CN106161410A - Data processing method, Apparatus and system - Google Patents

Abstract

The invention discloses a data processing method, device and system, belonging to the technical field of communication, comprising: generating an A-MPDU according to multiple MPDUs, and the A-MPDU includes y subframes; if the kth subframe is a non-empty subframe and is located in the first The length of the data part after the delimiter of the k subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then the first processing is performed on the kth subframe, and the first processing makes it located at the kth subframe The length of the data part after the delimiter of the subframe and before the delimiter of the k+1th subframe is an integer multiple of x, 1≤k≤y, k is an integer; send the processed A-MPDU to the receiving end , so that the receiving end can obtain multiple MPDUs according to the processed A-MPDU analysis. The invention solves the problem of waste of communication system resources and realizes the effect of reducing the waste of communication system resources. The invention is used for data transmission.

Description

Data processing method, device and system

technical field

The present invention relates to the field of communication technology, in particular to a data processing method, device and system.

Background technique

802.11 is a wireless local area network communication standard. 802.11n introduces an optional Aggregation-Medium access control Protocol Data Unit (English: Aggregation-Medium access control Protocol Data Unit; abbreviation: A-MPDU) transmission mechanism. In the subsequent 802.11ac, A-MPDU becomes Required mechanism. In the A-MPDU transmission mechanism, the sending end aggregates multiple messages into one message in the form of A-MPDU at the MAC layer, and transmits the message to the receiving end.

The A-MPDU includes a plurality of subframes, and each subframe consists of a delimiter (English: Delimiter) at the head of the subframe, and a media access control protocol data unit (English: Medium accesscontrol Protocol Data Unit; : MPDU) and padding bits (English: Pad) at the end of the subframe. Among them, Delimiter is 4 bytes long, and Delimiter includes MPDU length indication (English: MPDULength) and MPDU characteristic bit (English: MPDU Signature), MPDU Length is used to indicate the length of the MPDU in this subframe, and MPDU Signature is used to identify this subframe The starting position of the frame, the content of MPDUSignature is a given sequence ("0x4E" in the current 802.11 standard); the length of Pad is 0-3 bytes, and its function is to make the sum of the length of MPDU and Pad a 4-byte integer times, so the length of the Pad can be adjusted according to the length of the MPDU. During data parsing, the receiving end guesses the starting position of the next subframe according to the MPDULength in the Delimiter. If the MPDU Length of a certain subframe is decoded incorrectly, it can search for the next MPDU Signature in the A-MPDU to determine the next subframe. The starting position of the frame. Since the length of the Delimiter is 4 bytes, the receiver can search for the MPDU Signature sequence in the A-MPDU in units of 4 bytes. If the last byte of the current 4 bytes matches the MPDU Signature, it can be considered that the current 4 bytes are the Delimiter of a subframe; otherwise, search for the next 4 bytes and perform the matching operation again. Obviously, this method of searching in units of 4 bytes is much faster in data parsing than searching in units of 1 byte. Therefore, the length of the corresponding Pad can be adjusted according to the length of the MPDU in each subframe, so that the sum of the length of the MPDU and the corresponding Pad is an integer multiple of 4 bytes, so that the receiving end can use 4 bytes after receiving the data message. Do a quick search for your unit. 802.11ac also introduces the Downlink Multiple User-Multiple Input Multiple Output (English: DownLink Multiple User-Multiple Input Multiple Output; abbreviation: DL MU-MIMO) mechanism, that is, the sender can generate multiple data messages, and each data message is The transmission is performed in the form of A-MPDU, and the sending end simultaneously carries multiple data messages on different spatial streams and sends them to multiple receiving ends.

In 802.11ax, the next-generation technical standard of 802.11ac, the MAC layer also adopts the A-MPDU structure, and the basic structure of the subframe is the same as that in 802.11ac, and the DL MU-MIMO mechanism is also adopted in 802.11ax . In addition, 802.11ax also introduces other multi-user mechanisms, such as Orthogonal Frequency Division Multiple Access (English: Orthogonal Frequency Division Multiple Access; OFDMA for short) and uplink multiple user multiple input multiple output (English: Uplink Multiple User-Multiple Input Multiple Output; abbreviation: UL MU-MIMO). Regardless of the multi-user transmission mechanism, it will cause multiple A-MPDUs to exist at the same time, and each A-MPDU contains multiple subframes, that is, the multi-user transmission mechanism causes a large number of subframes to appear simultaneously in the transmission. The number of filled subframes will also be large, which increases the additional overhead of the communication system, thus causing a waste of communication system resources.

Contents of the invention

In order to solve the problem of waste of communication system resources, the present invention provides a data processing method, device and system. Described technical scheme is as follows:

In a first aspect, a data processing method is provided for a sending end, the data processing method includes:

Generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, the The data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, and y≥ 2, y is an integer;

If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth Subframes perform the first processing, the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤ y, k are integers;

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe includes: moving the part of the length m of the head of the MPDU located in the k+1th subframe to After the MPDU of the kth subframe after the delimiter of the kth subframe, before the delimiter of the k+1th subframe, so that after the delimiter of the kth subframe, the The length of the data part before the delimiter of the k+1th subframe is an integer multiple of x, wherein, 0<m≤x-1, m is an integer;

and sending the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by parsing the processed A-MPDU.

In combination with the first aspect, in the first implementable manner of the first aspect,

The data processing method further includes: when the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the first processing of the kth subframe includes:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the MPDU located in the kth subframe The sum of the lengths of the MPDUs of the kth subframe after the delimiter is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer.

In combination with the first aspect or the first implementable manner of the first aspect, in the second implementable manner of the first aspect,

When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information;

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to the The length of the part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the The length of the part after the MPDU of the k-1 subframe and before the delimiter of the kth subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is located in the kth subframe The length of the part after the delimiter of subframes.

In a second aspect, a data processing method is provided for a sending end, and the data processing method includes:

Generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, the The data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, y≥2, y is an integer;

If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth Subframes carry out the second processing, the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤ y, k are integers;

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe includes: moving the part with a length of m at the end of the MPDU of the kth subframe to the k+th subframe Before the MPDU of 1 subframe and after the delimiter of the k+1th subframe, the length of the data part after the delimiter of the kth subframe and before the k+1th delimiter is an integer multiple of x , where, 0≤m≤x-1, m is an integer;

and sending the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by parsing the processed A-MPDU.

In combination with the second aspect, in the first implementable manner of the second aspect,

The data processing method further includes: when the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the second processing of the kth subframe includes:

After the MPDU of the kth subframe located after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the MPDU of the k-1th subframe is moved to the MPDU of the kth subframe The sum of the length of the part before and after the delimiter of the kth subframe, the length Q of the padding bit, and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0< Q≤x-1, Q is an integer.

In combination with the second aspect or the first possible implementation of the second aspect, in the second possible implementation of the second aspect,

When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information;

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe.

In combination with the second possible realization of the second aspect, in the third possible realization of the second aspect,

The delimiter of each subframe also includes a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe When there is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the delimiters of other subframes in the multiple subframes except the kth subframe are consistent with the The location identifiers in the kth subframe delimiter are different.

In combination with the second implementable manner of the second aspect or the third implementable manner of the second aspect, in the fourth implementable manner of the second aspect,

The delimiter of each subframe further includes a stuffing flag used to indicate whether there are stuffing bits in each subframe.

In a third aspect, a data processing method is provided for a receiving end, and the data processing method includes:

Receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of the subframes includes a delimiter and a data part, and the data part of each of the subframes The lengths are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second length indication information, so The data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer;

Analyzing and processing the subframes in the plurality of subframes in units of length x in order to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, and k is an integer , the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, the data part of the k-1th subframe is obtained from the The first part of the MPDU of the kth subframe is obtained, the second part of the MPDU of the kth subframe is obtained from the data part of the kth subframe, and the first part and the second part are combined to form The MPDU of the kth subframe, at this time 2≤k≤y;

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate the length of the kth subframe The length of the part where the MPDU is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located at the delimiter of the kth subframe The sum of the lengths of the following parts, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the location of the k+1th subframe The length of the part before the delimiter; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe, and the location of the kth subframe The sum of the length of the part before the delimiter and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate that the kth subframe The length of the part where the MPDU of the frame is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located in the kth subframe sum of the lengths of the part after the delimiter, and the second length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe.

In a fourth aspect, a data processing method is provided for a receiving end, the data processing method includes:

Receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of the subframes includes a delimiter and a data part, and the data part of each of the subframes The lengths are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second length indication information, so The data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer;

Analyzing and processing the subframes in the plurality of subframes in units of length x in order to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, and k is an integer , the parsing process includes performing a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the kth subframe Obtaining the first part of the MPDU of the kth subframe in the data part, obtaining the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and combining the first part with the The two parts are combined to form the MPDU of the kth subframe, at this time 1≤k≤y-1;

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe.

In combination with the fourth aspect, in the first implementable manner of the fourth aspect,

The delimiter also includes a filling identifier, and the parsing process also includes:

Detecting a filling identifier in the kth subframe;

Executing the first parsing process when it is detected that the padding flag indicates that the padding bit does not exist in the kth subframe;

When it is detected that the padding flag indicates that the padding bit exists in the kth subframe, the second parsing process is performed on the kth subframe: according to the first in the delimiter of the kth subframe In the length indication information and the second length indication information, in the data part of the kth subframe, the part with a distance of e from the delimiter of the kth subframe and a length of f is obtained as the part of the kth subframe For the MPDU of the k subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length indicated by the first length indication information in the delimiter of the kth subframe indicated length.

In a fifth aspect, a data processing device is provided, the data processing device is a sending end, and the data processing device includes:

A generating unit, configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, and each of the subframes includes a delimiter and A data part, the data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, y≥2, and y is an integer;

The first processing unit is configured to be a non-empty subframe in the kth subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , the first processing is performed on the kth subframe, and the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be x Integer multiple, 1≤k≤y, k is an integer;

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe includes: moving the part of the length m of the head of the MPDU located in the k+1th subframe to After the MPDU of the kth subframe after the delimiter of the kth subframe, before the delimiter of the k+1th subframe, so that after the delimiter of the kth subframe, the The length of the data part before the delimiter of the k+1th subframe is an integer multiple of x, wherein, 0<m≤x-1, m is an integer;

The sending unit is configured to send the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by analyzing the processed A-MPDU.

In combination with the fifth aspect, in the first implementable manner of the fifth aspect,

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the first processing of the kth subframe includes:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the MPDU located in the kth subframe The sum of the lengths of the MPDUs of the kth subframe after the delimiter is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer.

In combination with the fifth aspect or the first possible realization of the fifth aspect, in the second possible realization of the fifth aspect,

When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information;

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to the The length of the part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the The length of the part after the MPDU of the k-1 subframe and before the delimiter of the kth subframe;

Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is located in the kth subframe The length of the part after the delimiter of subframes.

In a sixth aspect, a data processing device is provided, the data processing device is a sending end, and the data processing device includes:

A generating unit, configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, and each of the subframes includes a delimiter and A data part, the data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x, where x≥1, and x is an integer , y≥2, y is an integer;

The second processing unit is used for the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , the second processing is performed on the kth subframe, and the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be x Integer multiple, 1≤k≤y, k is an integer;

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe includes: moving the part with a length of m at the end of the MPDU of the kth subframe to the k+th subframe Before the MPDU of 1 subframe and after the delimiter of the k+1th subframe, the length of the data part after the delimiter of the kth subframe and before the k+1th delimiter is an integer multiple of x , where, 0≤m≤x-1, m is an integer;

The sending unit is configured to send the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by analyzing the processed A-MPDU.

In combination with the sixth aspect, in the first implementable manner of the sixth aspect,

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the second processing of the kth subframe includes:

After the MPDU of the kth subframe located after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the MPDU of the k-1th subframe is moved to the MPDU of the kth subframe The sum of the length of the part before and after the delimiter of the kth subframe, the length Q of the padding bit, and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0< Q≤x-1, Q is an integer.

In combination with the sixth aspect or the first possible realization of the sixth aspect, in the second possible realization of the sixth aspect,

When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information;

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe.

In combination with the second possible realization of the sixth aspect, in the third possible realization of the sixth aspect,

The delimiter of each subframe also includes a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe When there is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the delimiters of other subframes in the multiple subframes except the kth subframe are consistent with the The location identifiers in the kth subframe delimiter are different.

In combination with the second implementable manner of the sixth aspect or the third implementable manner of the sixth aspect, in the fourth implementable manner of the sixth aspect,

The delimiter of each subframe further includes a stuffing flag used to indicate whether there are stuffing bits in each subframe.

In a seventh aspect, a data processing device is provided, the data processing device is a receiving end, and the data processing device includes:

The receiving unit is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, and each of the The length of the data part of the subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second Length indication information, the data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer ;

An analysis unit, configured to sequentially analyze and process the subframes in the plurality of subframes in units of length x to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤ y, k is an integer, and the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the k-1th subframe Obtaining the first part of the MPDU of the kth subframe in the data part, obtaining the second part of the MPDU of the kth subframe from the data part of the kth subframe, combining the first part with the The two parts are combined to form the MPDU of the kth subframe, at this time 2≤k≤y;

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate the length of the kth subframe The length of the part where the MPDU is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located at the delimiter of the kth subframe The sum of the lengths of the following parts, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the location of the k+1th subframe The length of the part before the delimiter; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe, and the location of the kth subframe The sum of the length of the part before the delimiter and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate that the kth subframe The length of the part where the MPDU of the frame is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located in the kth subframe sum of the lengths of the part after the delimiter, and the second length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe.

In an eighth aspect, a data processing device is provided, the data processing device is a receiving end, and the data processing device includes:

The receiving unit is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, and each of the The length of the data part of the subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second Length indication information, the data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer ;

An analysis unit, configured to sequentially analyze and process the subframes in the plurality of subframes in units of length x to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤ y, k are integers, and the parsing unit includes:

The first parsing unit is configured to perform a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the kth subframe Obtain the first part of the MPDU of the kth subframe from the data part of the k+1th subframe, obtain the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and combine the first part and the The second part is combined to form the MPDU of the kth subframe, at this time 1≤k≤y-1;

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe.

In combination with the eighth aspect, in the first implementable manner of the eighth aspect,

The delimiter also includes a padding identifier, and the parsing unit also includes:

a detection unit, configured to detect the filling identifier in the kth subframe;

The first parsing unit is specifically configured to perform the first parsing process on the kth subframe when the detection unit detects that the filling bit does not exist in the kth subframe;

The second parsing unit is configured to perform a second parsing process on the kth subframe when the detection unit detects that the stuffing flag indicates that the stuffing bits exist in the kth subframe: according to the kth subframe The first length indication information and the second length indication information in the delimiter of the k subframe, in the data part of the kth subframe, the distance from the delimiter of the kth subframe is e, And the part with a length of f is used as the MPDU of the kth subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length of the kth subframe The first length in the delimiter indicates the length indicated by the information.

In a ninth aspect, a data processing system is provided, and the data processing system includes: a sending end and a receiving end,

The sending end is the data processing device described in the fifth aspect or the sixth aspect;

The receiving end is the data processing device described in the seventh aspect or the eighth aspect.

In summary, the present invention provides a data processing method, device and system. For two adjacent subframes of an A-MPDU, the sending end moves some bytes of the MPDU header of the next subframe forward to the front The end of the MPDU of a subframe, or the sender moves some bytes at the end of the MPDU of the previous subframe to the head of the MPDU of the next subframe, so that it is located after the delimiter of the previous subframe. The length of the data part before the delimiter of a subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a scene of a data processing system provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an A-MPDU provided by an embodiment of the present invention;

Fig. 3 is a method flowchart of a data processing method provided by an embodiment of the present invention;

Fig. 4 is a method flowchart of another data processing method provided by an embodiment of the present invention;

Fig. 5 is a method flowchart of another data processing method provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of two adjacent subframes provided by an embodiment of the present invention;

Fig. 7 is a schematic diagram of a first treatment provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of another first treatment provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a delimiter provided by an embodiment of the present invention;

Fig. 9-1 is a schematic structural diagram of another delimiter provided by an embodiment of the present invention;

Fig. 9-2 is a schematic structural diagram of another delimiter provided by an embodiment of the present invention;

FIG. 9-3 is a schematic structural diagram of another delimiter provided by an embodiment of the present invention;

Fig. 9-4 is a schematic structural diagram of a delimiter provided by another embodiment of the present invention;

Fig. 9-5 is a schematic structural diagram of another delimiter provided by another embodiment of the present invention;

Fig. 10 is a method flowchart of another data processing method provided by an embodiment of the present invention;

Fig. 11 is a method flowchart of a data processing method provided by another embodiment of the present invention;

Fig. 12 is a method flowchart of another data processing method provided by another embodiment of the present invention;

FIG. 13 is a schematic structural diagram of another two adjacent subframes provided by an embodiment of the present invention;

Fig. 14 is a schematic diagram of a second process provided by an embodiment of the present invention;

Fig. 15 is a schematic diagram of another second processing provided by an embodiment of the present invention;

Fig. 16 is a method flow chart of a parsing process provided by an embodiment of the present invention;

Fig. 17 is a schematic structural diagram of a data processing device provided by an embodiment of the present invention;

Fig. 18 is a schematic structural diagram of another data processing device provided by an embodiment of the present invention;

Fig. 19 is a schematic structural diagram of another data processing device provided by an embodiment of the present invention;

Fig. 20 is a schematic structural diagram of another data processing device provided by an embodiment of the present invention;

Fig. 21 is a schematic structural diagram of an analysis unit provided by an embodiment of the present invention;

Fig. 22 is a schematic structural diagram of another parsing unit provided by an embodiment of the present invention;

Fig. 23 is a schematic structural diagram of a data processing device provided by another embodiment of the present invention;

Fig. 24 is a schematic structural diagram of another data processing device provided by another embodiment of the present invention;

Fig. 25 is a schematic structural diagram of another data processing device provided by another embodiment of the present invention;

Fig. 26 is a schematic structural diagram of another data processing device provided by another embodiment of the present invention.

By way of the above drawings, specific embodiments of the invention have been shown and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept for those skilled in the art by referring to specific embodiments.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , an embodiment of the present invention provides a schematic diagram of a scenario of a data processing system. The data processing system includes a sending end A and a receiving end B. The sending end A can generate multiple data messages, and simultaneously send multiple data messages to A data message is aggregated into an A-MPDU and sent to the receiving end B, and the A-MPDU may include multiple subframes. The sending end A may be a router, and the receiving end B may be a computer or a mobile phone. It should be noted that the sending end A and the receiving end B may also be other devices, which is not limited in this embodiment of the present invention.

Figure 2 is a schematic structural diagram of the A-MPDU in 802.11n and 802.11ac, as shown in Figure 2, the A-MPDU includes n subframes, and n is greater than or equal to 1, and each subframe is delimited by the Symbol, MPDU located in the middle of the subframe and padding bits located at the end of the subframe. The delimiter of each subframe includes an MPDU length indication and an MPDU flag, the MPDU length indication is used to indicate the length of the MPDU in the subframe (in bytes), and the MPDU flag is used to identify the starting position of the subframe , in the 802.11 standard, the length of the delimiter is 4 bytes. When the receiving end receives the A-MPDU and parses it, the receiving end guesses the starting position of the next subframe according to the MPDU length indication in the delimiter. If the MPDU length indication of a certain subframe indicates a decoding error, it can pass Search the next MPDU flag in the A-MPDU, find the next subframe and analyze the next subframe. Since the MPDU flag is located in the delimiter of the subframe, in order to facilitate the receiving end to determine the position of the next subframe by searching for the next MPDU flag, it usually adds padding bits after the MPDU of each subframe, so that the MPDU and the padding The sum of the bit lengths is an integer multiple of the length of the delimiter, and the length of the padding bits can be adjusted according to the length of the MPDU in the subframe. The specific filling content of the stuffing bits can be all 0s or all 1s or a random sequence, which is a redundant bit.

As an example, the length in this embodiment of the present invention is in units of bytes, for example, the length of the delimiter is 4 bytes, that is, the number of bytes in the delimiter is 4. For example, subframe 2 in FIG. 2 consists of a delimiter at the head of subframe 2, an MPDU at the middle of subframe 2, and padding bits at the end of subframe 2, wherein the length of the delimiter is 4 bytes, the length of the padding bit is 0-3 bytes, when the length of the MPDU of subframe 2 is not an integer multiple of 4 bytes, the subframe is made by adding padding bits after the MPDU of the subframe The sum of the MPDU length of 2 and the padding bit length is an integer multiple of 4 bytes.

As shown in Figure 3, the embodiment of the present invention provides a data processing method, the data processing method can be used at the sending end, and the data processing method can include:

Step 301, generate an A-MPDU according to multiple MPDUs, the A-MPDU includes y subframes, each subframe may include a delimiter and a data part, the data part may include an MPDU, and the length of the data part of each subframe is greater than or equal to zero, The length of the delimiter of each subframe is x bytes, x≥1, x is an integer, y≥2, and y is an integer.

For example, the delimiter length x in the current 802.11n and 802.11ac standards is 4 bytes. Assuming that there are N1 MPDUs in total, and the number of subframes in the A-MPDU is N2, then N2 is greater than or equal to N1. Among them, N1 subframes correspond to N1 MPDUs, and the remaining N2-N1 subframes are empty subframes, which function to make the distance between adjacent non-empty subframes meet the preset requirements (the empty subframe is located between two non-empty subframes) Or fill the A-MPDU to a certain length (non-empty subframes are located after all non-empty subframes). Of course, the A-MPDU may also contain only N1 non-empty subframes without empty subframes, that is, N1=N2. The empty subframe only includes a delimiter and does not include an MPDU, that is, the empty subframe may include a delimiter and a data part with a length of zero, so the length of the empty subframe is fixed to x bytes. The multiple subframes refer to an ordered subframe sequence composed of N1 non-empty subframes and possible empty subframes. The length of the data part of the empty subframe is equal to zero, and the length of the data part of the non-empty subframe is greater than zero.

Step 302, if the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then the K subframes perform the first processing, and the first processing makes the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y , k is an integer; wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe may include: the length of the header of the MPDU located in the k+1th subframe The part that is m is moved to after the MPDU of the k-th subframe after the delimiter of the k-th subframe, and before the delimiter of the k+1-th subframe, so that after the delimiter of the k-th subframe, The length of the data part before the delimiter of k+1 subframes is an integer multiple of x, where 0<m≤x-1, m is an integer.

Step 303: Send the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by analyzing the processed A-MPDU.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sending end will forward some bytes of the MPDU header of the next subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

It is worth noting that the above first processing procedure is executed subframe by subframe starting from the first subframe of the A-MPDU, and the execution result of the previous subframe will affect the number of bytes that need to be shifted forward when the subsequent subframe is executed. The execution result of the above-mentioned first processing procedure is that for any subframe in the plurality of subframes, a part of its data part is located before its delimiter, and another part of its data part is located after its delimiter. Of course, if the kth subframe is the first subframe, since there is no subframe before the first subframe, the part before the delimiter in the data part of the first subframe does not exist, that is, the The data part of the first subframe is located after the delimiter of the first subframe.

When the kth subframe is an empty subframe and the kth subframe is the last subframe, or the kth subframe is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, for the kth The process of the first processing of the subframe may include: adding a padding bit with a length of Q after the MPDU of the kth subframe after the delimiter of the kth subframe, so that the length Q of the padding bit is the same as that in the kth subframe The sum of the MPDU lengths of the kth subframe after the delimiter is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer. In other words, when the kth subframe is an empty subframe and the kth subframe is the last subframe, or the kth subframe is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the The processing rule of the kth subframe is different from that of other subframes. Since there is no subsequent subframe for the kth subframe at this time to provide it with a forward byte, the method of filling redundant bits can only be used. It should be noted that the empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, and the non-empty subframe is the data subframe. frame.

Further, when k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information; wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is located in the kth subframe The length of the part after the delimiter of the subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe Length, when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the second length indication information in the delimiter of the kth subframe The indicated length is zero. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the delimitation of the k+1th subframe The length of the part before the symbol, when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, the length of the MPDU in the delimiter of the kth subframe The second length indication information is used to indicate the length of the part where the MPDU of the second subframe is moved after the MPDU of the first subframe and before the delimiter of the second subframe. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The length of the part, when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, the second in the delimiter of the kth subframe The length indicated by the length indication information is zero. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate the length of the part of the MPDU of the k subframe after the delimiter of the k subframe, when k=1, Both the first length indication information and the second length indication information in the delimiter of the kth subframe are used to indicate the length of the MPDU of the kth subframe. It should be noted that both the first length indication and the second length indication in the delimiter of the empty subframe are set to zero.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sending end will forward some bytes of the MPDU header of the next subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 4, the embodiment of the present invention provides another data processing method, which can be used at the receiving end, and the data processing method can include:

Step 401, receive the A-MPDU sent by the sending end, the A-MPDU includes y subframes, each subframe may include a delimiter and a data part, the length of the data part of each subframe is greater than or equal to zero, and the delimiter of each subframe The length of the symbol is x, x≥1, x is an integer, the delimiter may include the first length indication information and the second length indication information, the data part may include MPDU, and the delimiter between every two subframes The length of the data part is an integer multiple of x, y≥2, and y is an integer.

Step 402, sequentially analyze and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, and k is Integer, the parsing process for the kth subframe may include: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, obtain the first length from the data part of the k-1th subframe The first part of the MPDU of the k subframe, the second part of the MPDU of the kth subframe is obtained from the data part of the kth subframe, and the first part and the second part are combined to form the MPDU of the kth subframe. At this time, 2 ≤k≤y.

For example, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth subframe. -The length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe, The sum of the length of the part before the delimiter of the kth subframe and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate the k+1th subframe The MPDU of the frame is moved to the length of the part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth- The sum of the length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information uses After the MPDU indicating the kth subframe is moved to the MPDU of the k-1th subframe, the length of the part before the delimiter of the kth subframe; or, the first length indication information is used to indicate the MPDU of the kth subframe The sum of the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the The two-length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sending end will forward some bytes of the MPDU header of the next subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

It should be noted that when the receiving end generates the A-MPDU, the first processing must be performed subframe by subframe, and the processing result of the previous subframe will affect the processing of the next subframe. However, when the receiving end parses any subframe, it only needs to analyze the subframe according to the first length indication information and the second length indication information in the subframe delimiter, without relying on information of other subframes .

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sending end will forward some bytes of the MPDU header of the next subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 5, the embodiment of the present invention provides another data processing method for the sending end and the receiving end. The data processing method may include:

Step 501, the sender acquires multiple data messages.

For example, the data message may be generated by a communication device connected to the sender, where the communication device may be a computer, or the data message may be generated locally by the sender, which is not limited in this embodiment of the present invention.

Step 502, the sender generates multiple MPDUs according to multiple data messages.

The sending end may generate multiple corresponding MPDUs according to the multiple data messages acquired in step 501, and each MPDU records data corresponding to the data message corresponding to the subframe.

Step 503, the sender generates an A-MPDU according to multiple MPDUs.

Exemplarily, the A-MPDU may include y subframes, y≥2, and y is an integer. Each subframe includes a delimiter and a data part, the data part may include MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x bytes, x≥1, x is an integer. For example, the delimiter length in the current 802.11n and 802.11ac standards is 4 bytes. It should be noted that, in the 802.11ax communication standard or other communication standards, the length of the delimiter may also be other values, which is not limited in this embodiment of the present invention. The number of the multiple MPDUs may not be equal to the number of subframes in the A-MPDU. Assuming that there are N1 MPDUs in total, and the number of subframes in the A-MPDU is N2, then N2 is greater than or equal to N1. Among them, N1 subframes correspond to N1 MPDUs, and the remaining N2-N1 subframes are empty subframes, which function to make the distance between adjacent non-empty subframes meet the preset requirements (the empty subframe is located between two non-empty subframes) Or fill the A-MPDU to a certain length (non-empty subframes are located after all non-empty subframes). Of course, the A-MPDU may only include N1 non-empty subframes without empty subframes, that is, N1=N2. The empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and a data part with a length of zero, so the length of the empty subframe is fixed x bytes, that is, the length of the delimiter in the empty subframe. A plurality of subframes refers to an ordered subframe sequence composed of N1 non-empty subframes and possible empty subframes, the length of the data part of the empty subframe is equal to zero, and the length of the data part of the non-empty subframe is greater than zero.

Step 504, the sending end sequentially performs the first processing on the subframes in the multiple subframes to obtain the processed A-MPDU.

It should be noted that performing the first processing on the subframe refers to processing the passed subframe so that the length of the data part located after the delimiter of the current subframe and before the delimiter of the next subframe is an integer of x times, that is, the length of the MPDU of a subframe is an integer multiple of x, where the length of a subframe MPDU refers to the distance from the last byte of the subframe delimiter to the first byte of the next subframe delimiter The length of the data part between. The empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, and the delimiter located in the empty subframe in the empty subframe After that, the length of the data part before the delimiter of the next subframe of the empty subframe is zero, which is an integer multiple of x, so there is no need to perform the first processing on the empty subframe. It should be noted that, in the embodiment of the present invention, a subframe is a non-empty subframe, which means that the subframe is not an empty subframe. If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth subframe Perform the first processing, the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y, k is Integer; It should be noted that when k=y, the kth subframe is the last subframe, since the number of subframes in the A-MPDU is y, there is no k+1th subframe at this time, so The first processing may make the length of the data part of the kth subframe after the delimiter of the kth subframe be an integer multiple of x.

On the one hand, when the kth subframe is a non-empty subframe, there is a k+1th subframe and it is a non-empty subframe, and the data located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe The length of the part is not an integer multiple of x, and the first processing process for the kth subframe may include: moving the part of the length m of the head of the MPDU located in the k+1th subframe to the kth subframe After the delimiter of the kth subframe after the MPDU of the k+1th subframe, before the delimiter of the k+1th subframe, so that after the delimiter of the kth subframe and before the delimiter of the k+1th subframe The length of the data part is an integer multiple of x, where, 0<m≤x-1, m is an integer.

As shown in FIG. 6, the kth subframe and the k+1th subframe are two adjacent subframes, and the kth subframe is a non-empty subframe, and the k+1th subframe is also a non-empty subframe. The k subframe is located before the k+1th subframe, the length of the delimiter of the kth subframe and the k+1th subframe are both x, and it is located after the delimiter of the kth subframe, located in the kth subframe The length of the data part before the delimiter of +1 subframe is M. Before performing the first processing on the kth subframe, it can be judged whether the length M of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is x Integer multiple, if M is an integer multiple of x, then the first processing is not performed on the kth subframe. As shown in Figure 7, if M is not an integer multiple of x, the first processing is performed on the kth subframe. Specifically, the sender can calculate the remainder of M divided by x, and the difference between x and the remainder of M divided by x value m, and move the data part of the header of the MPDU of the k+1th subframe whose length is m bytes to after the MPDU of the kth subframe after the delimiter of the kth subframe, k+1 before the delimiter of the subframe, so that the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is an integer multiple of x. At this time, the data part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe is MPDU1 of the k+1th subframe, and the data part after the delimiter of the k+1th subframe The data part of the k+1 subframe is MPDU 2 of the k+1 subframe, and MPDU1 and MPDU2 form the MPDU of the k+1 subframe.

For example, when the kth subframe is a non-empty subframe, there is a k+1th subframe, and the k+1th subframe is also a non-empty subframe, the lengths of the delimiters of the kth subframe and the k+1th subframe are the same is x bytes, x is equal to 4, the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is M equals to 9 bytes, and 9 is not an integer multiple of 4. M is not an integer multiple of x. The remainder of M divided by x is equal to the remainder 1 of 9 divided by 4, and the difference m between x and M divided by x is equal to the difference 3 between 4 and 1. Since M is not an integer multiple of x, it is located in the kth subframe The length of the data part after the delimiter of the k+1th subframe and before the delimiter of the delimiter is not an integer multiple of the length of the delimiter, so the first processing can be performed on the kth subframe so that it is located in the kth subframe The length of the data part after the delimiter of the k+1th subframe and before the delimiter of the subframe is an integer multiple of the length of the delimiter. Specifically, the data part of the header of the MPDU of the k+1th subframe with a length of 3 bytes can be moved to after the MPDU of the kth subframe after the delimiter of the kth subframe, the k+1th Before the delimiter of the subframe, the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is 9 bytes, 3 bytes and 12 bytes , 12 bytes is an integer multiple of 4 bytes, that is, the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is an integer multiple of the length of the delimiter.

It is worth noting that the above first processing procedure is executed subframe by subframe starting from the first subframe of the A-MPDU, and the execution result of the previous subframe will affect the number of bytes that need to be shifted forward when the subsequent subframe is executed. The execution result of the above-mentioned first processing procedure is that for any subframe in the plurality of subframes, a part of its data part is located before its delimiter, and another part of its data part is located after its delimiter. Of course, if the kth subframe is the first subframe, since there is no subframe before the first subframe, the part before the delimiter in the data part of the first subframe does not exist, that is, the The data part of the first subframe is located after the delimiter of the first subframe.

For example, if the kth subframe is a non-empty subframe, there is a k+1th subframe, and the k+1th subframe is also a non-empty subframe, before the first processing is performed on the kth subframe, the kth subframe and the kth subframe The length of the delimiter of +1 subframe is x bytes, and x is equal to 4, assuming that the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is M Equal to 9 bytes, 9 bytes is not an integer multiple of 4 bytes, that is, M is not an integer multiple of x. Assume that the length of the data part after the delimiter of the k+1 subframe and before the delimiter of the k+2 subframe is 8 bytes, and 8 bytes is an integer multiple of 4 bytes, that is, the k+th subframe The length of the data part after the delimiter of the k+1th subframe in the MPDU of one subframe is an integer multiple of x. Since the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, it is necessary to perform the first processing on the kth subframe, and divide M by x The remainder is equal to the remainder 1 of 9 divided by 4, and the difference m between x and M divided by the remainder of x is equal to the difference 3 between 4 and 1. When performing the first processing on the kth subframe, the k+1th subframe The data part of the head of the MPDU whose length is 3 bytes is moved to the MPDU of the kth subframe after the delimiter of the kth subframe, and before the delimiter of the k+1th subframe, so that it is located at the delimiter of the kth subframe The length of the data part after the delimiter of the k subframe and before the delimiter of the k+1th subframe is 9 bytes, 3 bytes and 12 bytes, and 12 bytes is an integer multiple of 4 bytes. After performing the first processing on the kth subframe, the length of the data part after the delimiter of the k+1th subframe in the MPDU of the k+1th subframe is 8-3 equal to 5 bytes, 5 bytes It is not an integer multiple of 4 bytes, that is, after performing the first processing on the k-th subframe relative to before performing the first processing on the k-th subframe, in the k+1-th subframe MPDU, the fixed number located in the k+1th subframe The length of the data portion after the delimiter has changed.

It should be noted that when the kth subframe is a non-empty subframe, and there is a k+1th subframe and is a non-empty subframe, after the first processing is performed on the k-1th subframe, if the kth subframe is located The length of the data part after the delimiter and before the delimiter of the k+1th subframe is an integer multiple of the length x of the delimiter, so the first processing does not need to be performed on the kth subframe.

On the other hand, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe , the process of the first processing of the kth subframe may include: adding a padding bit with a length of Q after the MPDU of the kth subframe after the delimiter of the kth subframe, so that the length Q of the stuffing bit is the same as that located at The sum of the lengths of the MPDUs of the kth subframe after the delimiter of the kth subframe is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer.

Specifically, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, The process of the first processing of the kth subframe is the same as the first processing of the kth subframe if the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is a non-empty subframe The process is different, since the kth subframe has no subsequent non-empty subframe to provide it with forward bytes, so the method of filling redundant bits can only be used. Before performing the first processing on the kth subframe, it can be detected whether the length of the data part after the delimiter of the kth subframe is an integer multiple of x. It should be noted that at this time, the length of the data part located in the kth subframe The data part after the delimiter is the MPDU after the delimiter of the last subframe. If after detection, it is known that the length of the data part after the delimiter of the kth subframe is an integer multiple of x, then the first processing is not performed on the kth subframe. If it is detected that the length of the data part after the delimiter of the kth subframe is not an integer multiple of x, the first process is performed on the kth subframe. Wherein, the first processing procedure of the kth subframe may include: calculating the remainder of dividing the length of the data part after the delimiter of the kth subframe by x, and the difference Q between x and the remainder, and After the data part of the kth subframe after the delimiter of the kth subframe, a stuffing bit with a length of Q is added, so that the length Q of the stuffing bit is the same as the data of the last subframe after the delimiter of the last subframe The sum of the lengths of the parts is equal to an integer multiple of x.

As shown in Figure 8, if the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe frame, the length of the delimiter of the kth subframe is x, and the length of the data part of the kth subframe is M before the first processing is performed on the k-1th subframe. Assume that when the first processing is performed on the k-1th subframe, the data part of the length m of the head of the MPDU of the kth subframe is moved to the kth after the delimiter of the k-1th subframe After the MPDU of the 1st subframe, before the delimiter of the kth subframe, after the delimiter of the k-1th subframe, after the MPDU of the k-1th subframe, before the delimiter of the kth subframe The data part with a length of m is the MPDU1 of the kth subframe, the data part of the kth subframe after the delimiter of the kth subframe can be MPDU2, and the MPDU1 of the kth subframe is composed of the MPDU2 of the kth subframe MPDU of the kth subframe. At this time, the length of the data part after the delimiter of the kth subframe is M-m. If M-m is an integer multiple of x, the first process is not performed on the kth subframe. If M-m is not an integer multiple of x, perform the first processing on the kth subframe. Specifically, the sending end may calculate the remainder of dividing the length of the data part after the delimiter of the kth subframe by x, and the difference Q of the remainder of x, and calculate the remainder after the delimiter of the kth subframe Add padding bits of length Q after the data part of the kth subframe, so that the sum of the length Q of the padding bits and the length of the data part of the kth subframe after the delimiter of the kth subframe is equal to an integer multiple of x .

It should be noted that if the length of the data part after the delimiter of the k-1th subframe and before the delimiter of the kth subframe is an integer multiple of x, then it is not necessary to perform the first Once processed, at this time, there is no need to move the data part of the length m of the head of the MPDU of the kth subframe to after the MPDU of the k-1th subframe after the delimiter of the k-1th subframe, the second The length of the data part before the delimiter of the k subframe, that is, after the delimiter of the kth subframe is M.

For example, the length of the delimiter of each subframe in the plurality of subframes is x equal to 4 bytes, if the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe frame and there is a k+1th subframe and the k+1th subframe is an empty subframe, the length of the data part after the delimiter of the kth subframe is 9 bytes, and 9 bytes are not an integer multiple of 4 bytes , that is, the length of the data part after the delimiter of the kth subframe is not an integer multiple of x. It should be noted that, at this time, the data part after the delimiter of the kth subframe is located in the last subframe MPDU after the delimiter. The length of the data part after the delimiter of the kth subframe is divided by the remainder of x equal to the remainder 1 of 9 divided by 4, and the difference between x and this remainder is equal to the remainder Q of 9 divided by 4. The difference Q is equal to 4 and The difference of 1 is 3, and a padding bit with a length of 3 bytes is added after the data part after the delimiter of the kth subframe, so that the length of the padding bit is the same as that of the kth subframe after the delimiter of the last subframe The sum of the lengths of the MPDUs of each subframe is equal to an integer multiple of 4 bytes.

It should be noted that when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe When, after the first processing is performed on the subframe before the kth subframe, if the length of the data part after the delimiter of the kth subframe is still an integer multiple of the length x of the delimiter, there is no need to The kth subframe performs the first processing. When the A-MPDU contains only one subframe, that is, when y=1, the process of the first processing of the subframe can refer to when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or When the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the process of the first processing of the kth subframe, that is, when the subframe after the delimiter When the length of the data part is not an integer multiple of the length of the delimiter, padding bits are added after the MPDU of the subframe, so that the sum of the length of the MPDU after the delimiter of the subframe and the length of the stuffing bits is the length of the delimiter Integer multiples of .

Further, when the sending end generates an A-MPDU according to multiple MPDUs in step 503, the A-MPDU may include multiple subframes, and any subframe in the multiple subframes includes a delimiter and an MPDU, and in step In 504, while the sending end performs the first processing on the kth subframe, the sending end may set the delimiter of the kth subframe according to the first processing procedure on the kth subframe. Exemplarily, when k≧2, the delimiter of the kth subframe may include the first length indication information and the second length indication information.

In the first aspect, the first length indication information in the delimiter of the kth subframe may be used to indicate the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the kth The second length indication information in the delimiter of the subframe is used to indicate the length of the data part after the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. Please refer to FIG. 7, the first length indication information in the delimiter of the k+1th subframe can be used to indicate the length of the MPDU2, and the second length indication information in the delimiter of the k+1th subframe Can be used to indicate the length of the MPDU1. It should be noted that when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the second length indication information in the delimiter of the kth subframe The length indicated by the length indication information is zero. If the kth subframe is an empty subframe, the length indicated by the first length indication and the length indicated by the second length indication in the delimiter of the kth subframe are both zero.

In the second aspect, the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate The length of the data part after the MPDU of the k+1 subframe is moved to the MPDU of the kth subframe and before the delimiter of the k+1th subframe. Please refer to FIG. 7, the first length indication information in the delimiter of the k+1th subframe can be used to indicate the sum of the lengths of MPDU1 and MPDU2, and the first length indication information in the delimiter of the k+1th subframe The two-length indication information can be used to indicate that the MPDU of the k+2th subframe (not shown in FIG. 7) is moved to the data part after the MPDU of the k+1th subframe and before the delimiter of the k+2th subframe length. It should be noted that when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the second length indication information in the delimiter of the kth subframe The length indication information is used to indicate the length of the part where the MPDU of the second subframe is moved after the MPDU of the first subframe and before the delimiter of the second subframe. If the kth subframe is an empty subframe, the length indicated by the first length indication and the length indicated by the second length indication in the delimiter of the kth subframe are both zero.

In the third aspect, the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate The length of the data part after the MPDU of the k subframe is moved to the MPDU of the k-1th subframe and before the delimiter of the kth subframe. When the kth subframe is the first subframe in the plurality of subframes, the first length indication information in the delimiter of the first subframe is used to indicate the length of the MPDU of the first subframe , the length of the second length indication information in the delimiter of the first subframe is zero. Please refer to FIG. 7, the first length indication information in the delimiter of the k+1th subframe can be used to indicate the sum of the lengths of MPDU1 and MPDU2, and the first length indication information in the delimiter of the k+1th subframe The two-length indication information may be used to indicate the length of the MPDU1. It should be noted that when k=1, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the second length indication information in the delimiter of the kth subframe The length indicated by the length indication information is zero. If the kth subframe is an empty subframe, the length indicated by the first length indication and the length indicated by the second length indication in the delimiter of the kth subframe are both zero.

In the fourth aspect, the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate The length of the data part after the delimiter of the kth subframe in the MPDU of the k subframe. When the kth subframe is the first subframe among the plurality of subframes, both the first length indication information and the second length indication information in the delimiter of the first subframe are used to indicate that the first The length of the MPDU of subframes. Please refer to FIG. 7, the first length indication information in the delimiter of the k+1th subframe can be used to indicate the sum of the lengths of MPDU1 and MPDU2, and the first length indication information in the delimiter of the k+1th subframe The second length indication information may be used to indicate the length of the MPDU2. It should be noted that when k=1, both the first length indication information and the second length indication information in the delimiter of the kth subframe are used to indicate the length of the MPDU of the kth subframe. If the kth subframe is an empty subframe, the length indicated by the first length indication and the length indicated by the second length indication in the delimiter of the kth subframe are both zero.

Step 505, the sending end sends the processed A-MPDU to the receiving end.

In step 504, after the sending end sequentially performs the first processing on the subframes in the multiple subframes, the processed AMPDU is obtained. Then, the sending end can send the processed A-MPDU to the receiving end, so that the receiving end can obtain multiple MPDUs by parsing the processed A-MPDU. It should be noted that the processed A-MPDU sent by the sender and received by the receiver may include y subframes, and each subframe includes a delimiter and a data part, assuming that the kth subframe is any one of the y subframes subframe, the data part of the kth subframe is the data part between the delimiter of the kth subframe and the delimiter of the k+1th subframe. The length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, and x is an integer, and the delimiter includes the first length indication information and the second length indication information , the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer.

Step 506, the receiving end sequentially analyzes and processes the subframes in the processed A-MPDU to obtain multiple MPDUs.

Specifically, the processed A-MPDU may include y subframes, the kth subframe is any one of the y subframes, 1≤k≤y, k is an integer, and the analysis process of the kth subframe It may include: obtaining the first part of the MPDU of the kth subframe from the data part of the k-1th subframe according to the first length indication information and the second length indication information in the delimiter of the kth subframe, and obtaining the first part of the MPDU of the kth subframe from the data part of the kth subframe. The second data part of the MPDU of the kth subframe is obtained from the data part of the k subframe, and the first part and the second part are combined to form the MPDU of the kth subframe. In this case, 2≤k≤y.

Since there are four indication modes for the first length indication information and the second length indication information in the delimiter of the kth subframe in step 504, accordingly, there are four kinds of indication methods for the kth subframe in step 506. Parsing method.

In the first aspect, when the first length indication information in the delimiter of the kth subframe is used to indicate the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the kth subframe When the second length indication information in the delimiter is used to indicate the length of the data part after the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe and before the delimiter of the kth subframe, according to The first length indication information and the second length indication information in the delimiter of the subframe, obtain the first part of the MPDU of the kth subframe from the data part of the k-1th subframe, and obtain the first part of the MPDU of the kth subframe from the data part of the kth subframe Obtaining the second part of the MPDU of the k-th subframe may include:

According to the second length indication information in the delimiter of the kth subframe, from the data part of the k-1th subframe, obtain the data part that is close to the delimiter of the kth subframe and has a length of m (that is, the kth subframe - the last m bytes in the data part of 1 subframe), as the first part of the MPDU of the kth subframe, m is the length indicated by the second length indication information in the delimiter of the kth subframe; According to the first length indication information in the delimiter of the kth subframe, from the data part of the kth subframe, obtain the data part close to the delimiter of the kth subframe and having a length of p (that is, the kth subframe The first p bytes in the data part of the kth subframe), as the second part of the MPDU of the kth subframe, p is the length indicated by the first length indication information in the delimiter of the kth subframe. It should be noted that, after parsing the kth subframe, it can be determined according to the length p indicated by the first length indication information in the delimiter of the kth subframe and the length x of the delimiter After the delimiter of the kth subframe, the position with a distance of x×ceil(p/x) from the delimiter of the kth subframe is the starting position of the k+1th subframe, and the starting position of the k+1th subframe is The starting position is the starting position of the delimiter of the k+1th subframe. Specifically, ceil(p/x) represents the upper integer of the quotient of p and x, and x×ceil(p/x) represents the value of p and x The product of the upper integer of the quotient of p and x, for example, the upper integer of the quotient of p and x is: greater than or equal to the quotient of p and x, and the integer closest to the quotient of p and x, for example, the quotient of p and x is 5.1, then the upper integer of the quotient of p and x is 6; the upper integer of the quotient of p and x is 5, and the upper integer of the quotient of p and x is 5. The distance from the delimiter of the k-th subframe is defined as the distance from the last byte in the delimiter of the k-th subframe. If in the process of parsing the kth subframe, the delimiter of the kth subframe is decoded incorrectly, the receiving end cannot obtain the correct first length indication information and the second length indication information. At this time, the following can be searched One MPDU Signature obtains the starting position of the next subframe, which is consistent with the practice in the prior art.

It should be noted that when k=1, since there is no subframe before the first subframe before processing, that is, the first subframe does not move the data part of the MPDU header of the first subframe to the previous subframe Therefore, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the length indicated by the second length indication information in the delimiter of the kth subframe to zero. Therefore, when parsing the first subframe, according to the first length indication information in the delimiter of the kth subframe, the delimiter near the kth subframe can be obtained from the data part of the kth subframe. Delimiter and the data part of length p (that is, the first p bytes in the data part of the kth subframe), as the MPDU of the kth subframe, p is the first in the delimiter of the kth subframe The length indicates the length indicated by the information.

In the second aspect, when the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate the kth subframe When the MPDU of the +1 subframe is moved to the length of the data part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe, according to the first length indication information in the delimiter of the kth subframe And the second length indication information, obtain the first part of the MPDU of the kth subframe from the data part of the k-1th subframe, and obtain the second part of the MPDU of the kth subframe from the data part of the kth subframe, Can include:

According to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the data part of the k-1th subframe, obtain a delimiter close to the kth subframe and a length of F The data part (that is, the last F bytes in the data part of the k-1th subframe), as the first part of the MPDU of the kth subframe, F is the first length indication in the delimiter of the kth subframe The remainder of dividing the sum of the length indicated by the information and the length indicated by the second length indication information by x; according to the first length indication information and F in the delimiter of the kth subframe, from the data part of the kth subframe In, get the data part close to the delimiter of the kth subframe and the length is q (that is, the first q bytes in the data part of the kth subframe), as the second part of the MPDU of the kth subframe, q is a difference between the length indicated by the first length indication information in the delimiter of the kth subframe and F. It should be noted that, after parsing the kth subframe, the definition of the kth subframe can be determined according to the first length indication information and the second length indication information in the delimiter of the kth subframe. After the delimiter, the position with a distance of x×ceil(q/x) from the delimiter of the kth subframe is the starting position of the k+1th subframe, that is, the starting position is the kth subframe The starting position of the delimiter of the +1 subframe, for example, the distance from the delimiter of the kth subframe is defined as the distance after the last byte in the delimiter of the kth subframe For the distance between locations, the meaning of x×ceil(q/x) can refer to the above-mentioned explanation of the meaning of x×ceil(p/x), and the embodiment of the present invention does not repeat it here. If the delimiter of the kth subframe is decoded incorrectly, the receiving end cannot obtain the correct first length indication information and second length indication information. At this time, the starting position of the next subframe can be obtained by searching the next MPDU Signature, This is consistent with the practice in the prior art.

It should be noted that when k=1, since there is no subframe before the first subframe before processing, that is, the first subframe does not move the data part of the MPDU header of the first subframe to the previous subframe Therefore, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the second length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe. The length of the part where the MPDU of the two subframes is moved after the MPDU of the first subframe and before the delimiter of the second subframe. At this time, F is equal to zero. When parsing the kth subframe, it is only necessary to obtain the subframe near the kth subframe from the data part of the kth subframe according to the first length indication information in the delimiter of the kth subframe. The delimiter of the frame and the data part of length q (that is, the first q bytes in the data part of the kth subframe), as the MPDU of the kth subframe, and q is the delimiter of the kth subframe The first length of indicates the length indicated by the information.

In the third aspect, when the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate the kth subframe When the MPDU of the subframe is moved to the length of the data part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe, according to the first length indication information in the delimiter of the kth subframe and the first length indication information in the delimiter of the kth subframe Two length indication information, obtain the first part of the MPDU of the kth subframe from the data part of the k-1th subframe, and obtain the second part of the MPDU of the kth subframe from the data part of the kth subframe, which may include :

According to the second length indication information in the delimiter of the kth subframe, from the data part of the k-1th subframe, obtain the data part that is close to the delimiter of the kth subframe and has a length of r (that is, the kth subframe -the last r bytes in the data part of 1 subframe), as the first part of the MPDU of the kth subframe, r is the length indicated by the second length indication information in the delimiter of the kth subframe; According to the first length indication information and r in the delimiter of the kth subframe, from the data part of the kth subframe, obtain the data part that is close to the delimiter of the kth subframe and has a length of s (that is, the kth subframe The first s bytes in the data part of the subframe), as the second part of the MPDU of the kth subframe, s is the length indicated by the first length indication information in the delimiter of the kth subframe and r difference. It should be noted that, after parsing the kth subframe, the definition of the kth subframe can be determined according to the first length indication information and the second length indication information in the delimiter of the kth subframe. After the delimiter, the position with a distance of x×ceil(s/x) from the delimiter of the kth subframe is the starting position of the k+1th subframe, that is, the starting position is the kth subframe The starting position of the delimiter of the +1 subframe, for example, the distance from the delimiter of the kth subframe is defined as the distance after the last byte in the delimiter of the kth subframe For the distance between locations, the meaning of x×ceil(s/x) can refer to the above explanation of the meaning of x×ceil(p/x), which will not be described in detail here in the embodiment of the present invention. If the delimiter of the kth subframe is decoded incorrectly, the receiving end cannot obtain the correct first length indication information and second length indication information. At this time, the starting position of the next subframe can be obtained by searching the next MPDUSignature, which means It is consistent with the practice in the prior art.

It should be noted that when k=1, since there is no subframe before the first subframe before processing, that is, the first subframe does not move the data part of the MPDU header of the first subframe to the previous subframe Therefore, the first length indication information in the delimiter of the kth subframe is used to indicate the length of the MPDU of the kth subframe, and the length indicated by the second length indication information in the delimiter of the kth subframe to zero. That is, r is equal to zero. When parsing the kth subframe, it is only necessary to obtain the data close to the kth subframe from the data part of the kth subframe according to the first length indication information in the delimiter of the kth subframe. The delimiter and the data part with a length of s (that is, the first s bytes in the data part of the kth subframe), as the MPDU of the kth subframe, s is the delimiter of the kth subframe. A length indicates the length indicated by the information.

In the fourth aspect, when the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe The sum of the length of the data part of the kth subframe and the length of the data part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate the kth subframe When the MPDU of the subframe is located at the length of the data part after the delimiter of the kth subframe, according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the k-1th subframe Obtaining the first part of the MPDU of the kth subframe in the data part of the frame, and obtaining the second part of the MPDU of the kth subframe from the data part of the kth subframe may include:

According to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the data part of the k-1th subframe, obtain the delimiter close to the kth subframe and have a length of u The data part (that is, the last u bytes in the data part of the k-1th subframe), as the first part of the MPDU of the kth subframe, u is the first length indication in the delimiter of the kth subframe The difference between the length indicated by the information and the length indicated by the second length indication information; according to the second length indication information in the delimiter of the kth subframe, from the data part of the kth subframe, obtain the The delimiter of the subframe and the data part of length v (that is, the first v bytes in the data part of the kth subframe), as the second part of the MPDU of the kth subframe, v is the kth subframe The second length in the delimiter indicates the length indicated by the information. It should be noted that, after parsing the kth subframe, the definition of the kth subframe can be determined according to the first length indication information and the second length indication information in the delimiter of the kth subframe. After the delimiter, the position with a distance of x×ceil(v/x) from the delimiter of the kth subframe is the starting position of the k+1th subframe, that is, the starting position is the kth subframe The starting position of the delimiter of the +1 subframe, for example, the distance from the delimiter of the kth subframe is defined as the distance after the last byte in the delimiter of the kth subframe For the distance between positions, the meaning of x×ceil(v/x) can refer to the above-mentioned explanation of the meaning of x×ceil(p/x), and the embodiment of the present invention does not repeat it here. If the delimiter of the kth subframe is decoded incorrectly, the receiving end cannot obtain the correct first length indication information and second length indication information. At this time, the starting position of the next subframe can be obtained by searching the next MPDU Signature, This is consistent with the practice in the prior art.

It should be noted that when k=1, since there is no subframe before the first subframe before processing, that is, the first subframe does not move the data part of the MPDU header of the first subframe to the previous subframe Therefore, both the first length indication information and the second length indication information in the delimiter of the kth subframe are used to indicate the length of the MPDU of the kth subframe. At this time, u is equal to zero, and when parsing the kth subframe, it is only necessary to extract from the data part of the kth subframe according to the first length indication information or the second length indication information in the delimiter of the kth subframe , get the data part close to the delimiter of the kth subframe and the length is v (that is, the first v bytes in the data part of the kth subframe), as the MPDU of the kth subframe, v is the kth subframe The length indicated by the first length indication information or the second length indication information in the frame delimiter.

It should be noted that when the receiving end generates the A-MPDU, the first processing must be performed subframe by subframe, and the processing result of the previous subframe affects the processing of the next subframe. However, when the receiving end parses any subframe, it only needs to analyze the subframe according to the first length indication information and the second length indication information in the subframe delimiter, without relying on information of other subframes .

Step 507, the receiving end obtains multiple data messages according to multiple MPDUs.

Specifically, since in step 502, the sending end generates multiple corresponding MPDUs according to multiple data messages, and data corresponding to the data message corresponding to the subframe is recorded in each MPDU, so in step 507, the receiving end acquires After the multiple MPDUs, multiple data messages can be obtained according to the multiple MPDUs.

It should be noted that, before the sending end sequentially performs the first processing on the subframes in the multiple subframes, if the distance between two adjacent subframes in the multiple subframes is less than the preset distance, you need to One or more empty subframes are inserted between them, so that the distance between two adjacent subframes reaches the preset distance requirement. The empty subframes only include delimiters and do not include MPDUs, that is, empty subframes include delimiters and zero-length data. part, so the length of the empty subframe is fixed x bytes. The distance between two adjacent subframes, defined as the byte distance between the MPDU start positions of two subframes, that is, from the position of the last byte in the delimiter of the previous subframe to the next subframe The distance between the position of the last byte in the delimiter. A subframe containing an MPDU is called a data subframe. After inserting one or more empty subframes between two data subframes, the previous data subframe of the two data subframes is called a previous subframe, indicating that the subframe It is a data subframe and the subframe after this subframe is an empty subframe; the latter data subframe in the two data subframes is called a subsequent subframe, which means that this subframe is a data subframe and the subframe before this subframe A frame is an empty subframe, and a data subframe is a non-empty subframe. When the sending end sequentially performs the first processing on the subframes in the multiple subframes, the sending end may also detect whether the currently processed kth subframe is a preceding subframe.

Further, when performing the first processing for the kth subframe in the plurality of subframes, if the kth subframe is a previous subframe, that is, the kth subframe is a non-empty subframe and there is a k+1th subframe and the kth subframe is The k+1 subframe is an empty subframe, and the process of the first processing of the previous subframe can refer to step 504 when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe When there is an empty subframe and the k+1th subframe exists and the k+1th subframe is an empty subframe, the first processing procedure for the kth subframe. Specifically, since the next subframe of the previous subframe is an empty subframe, there is no subsequent subframe to provide the forward byte to the previous subframe, so the method of filling redundant bits can only be used to perform the first processing on the previous subframe Before, it can be detected whether the length of the data part after the delimiter of the previous subframe is an integer multiple of x, if the length of the data part after the delimiter of the previous subframe is an integer multiple of x, then no The first processing needs to be performed on the preceding subframe. If the length of the data part after the delimiter of the previous subframe is not an integer multiple of x, a padding bit is added after the MPDU after the delimiter of the previous subframe, so that the length of the stuffing bit is the same as that of the previous subframe. The sum of the lengths of MPDUs after the frame delimiter is equal to an integer multiple of x. Since the next subframe of the first subframe is an empty subframe, the empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, the data part after the delimiter of the empty subframe and before the delimiter of the next subframe of the empty subframe is zero, which is an integer multiple of x, so there is no need to perform the next subframe of the previous subframe The first processing can continue to perform the first processing on the following subframes according to the order of the multiple subframes. When processing to the next subframe, you can refer to when the kth subframe is a non-empty subframe and there is a k+1th subframe And when the k+1th subframe is a non-empty subframe, the process of the first processing of the kth subframe, that is, the processing of the subsequent subframes, does not need special treatment.

As shown in Figure 9, the number of bytes of the delimiter of each subframe in 802.11ac is 4, and one byte is 8 bits. Therefore, there are 32 bits in the delimiter, and the information included in it includes position identification , MPDU length indication, cyclic redundancy code (English: Cyclic Redundancy Code; abbreviation: CRC) and MPDU feature bits, wherein, the position identifier occupies 1 bit in the delimiter, the MPDU length indication occupies 14 bits, and the CRC occupies 8 bits. The MPDU flag occupies 8 bits, so there is one reserved bit left in the delimiter, and the reserved bit is empty. The location identifier, reserved bits, MPDU length indication, CRC and MPDU flag bits are arranged in sequence.

Assume that the delimiter in this embodiment is implemented by modifying the format of the 802.11ac delimiter, that is, the delimiter includes the first length indication information and the second length indication information. When x is equal to 4, the first length indication information and the second length indication information in the delimiter of the subframe need to be in the subframe when setting the delimiter of the subframe in the four indication modes. On the basis of the delimiter of the corresponding atomic frame, two idle bits are extracted, and the first length indication information and the second length indication information in the delimiter of the subframe can respectively occupy the two idle bits and the original The 14 bits occupied by the MPDU length indication, or the first length indication information and the second length indication information may respectively occupy the 14 bits occupied by the original MPDU length indication and the two idle bits. Preferably, the number of bits allocated for the first length indication information should be greater than the number of bits allocated for the second length indication information, and the MPDU length indication occupied by the first length indication information may be allocated 14 bits, the two idle bits are allocated for the second length indication information. It should be noted that when allocating the 14 bits occupied by the MPDU length indication and the two idle bits for the first length indication information and the second length indication information, other methods can also be used. Without limitation, there is only one free bit left in the 802.11ac delimiter, so another free bit needs to be obtained to form two free bits. For example, the following methods can be used to obtain 2 idle bits for carrying the second length indication information.

In the first aspect, the two free bits may be a reserved bit in the delimiter of the atomic frame corresponding to the subframe and any 8 bits occupied by the second characteristic indicator.

For example, as shown in Figure 9-1, the two free bits can be a reserved bit in the delimiter of the atomic frame corresponding to the subframe and a reserved bit in the delimiter of the atomic frame corresponding to the subframe. The second characteristic indicates any 1 bit among the 8 bits occupied.

As shown in Figure 9-2, the two free bits can be 1 bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe and one of the delimiters of the atomic frame corresponding to the subframe bit reserved.

As shown in Figure 9-3, the two free bits can be reserved for one bit in the delimiter of the atomic frame corresponding to the subframe and the second feature in the delimiter of the atomic frame corresponding to the subframe Indicates any 1 of the 8 bits occupied. The 14 bits occupied by the MPDU length indication and the 8 bits occupied by the first characteristic indication are moved backward by one bit.

In the second aspect, as shown in FIG. 9-4 , the two free bits can be a reserved bit in the delimiter of the atomic frame corresponding to the subframe and a bit occupied by the position identifier.

In the third aspect, the two free bits may be any 2 bits in the 8 bits occupied by the first feature indication or any 2 bits in the 14 bits occupied by the MPDU length indication in the delimiter of the atomic frame corresponding to the subframe. As shown in Figure 9-5, in the 802.11ah mechanism, the first feature indication in the subframe delimiter only needs to occupy four bits. Similarly, the CRC can also be shortened here, for example, using 6 bits CRC. In this way, the 2 bits saved by the CRC can be used to carry the second length indication information.

In the embodiment of the present invention, in step 504, during the process of performing the first processing on the subframes in the multiple subframes sequentially by the sending end, if the kth subframe is an empty subframe, since the empty subframe is located after the delimiter of the empty subframe The length of the data part before the delimiter of the subframe next to the empty subframe is zero, which is an integer multiple of the length of the delimiter, so there is no need to perform the first processing on the empty subframe. When setting the delimiter of each subframe in the plurality of subframes, the first length indication information and the second length indication information are set in the delimiter of each subframe, and the delimiter of the empty subframe The lengths indicated by the first length indication information and the second length indication information are both zero. When the receiving end in step 506 parses the subframes in the processed A-MPDU in turn, it only needs to obtain the first length indication information and the second length indication information in the delimiter of each subframe. Subframes are parsed.

Optionally, in step 504, when the sending end sequentially performs the first processing on the subframes in the multiple subframes, it may detect whether the currently processed subframe is an empty subframe, and if the currently processed subframe is an empty subframe, then it is not true. Empty subframe is processed; If the subframe of current processing is non-empty subframe, then judge whether need to carry out first processing to current subframe, if need to carry out first processing to current subframe, then can refer to the first processing of subframe in step 504 A specific process of processing. And if the subframe is an empty subframe, the delimiter of the empty subframe can not be set, that is, the format of the delimiter in the empty subframe can be the same as in the prior art; if the subframe is a non-empty subframe, then in the delimiter of the subframe The first length indication information and the second length indication information are set in the delimiter. In step 506, when the receiving end parses the processed A-MPDU, it can first detect whether the current subframe is an empty subframe. The parsing method parses the subframe. If the current subframe is a non-empty subframe, the current subframe may be analyzed with reference to the specific analysis method for subframes in step 506 .

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sending end will forward some bytes of the MPDU header of the next subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 10, the embodiment of the present invention provides another data processing method, which can be used at the sending end, and the data processing method can include:

Step 901, generate A-MPDU according to multiple MPDUs, A-MPDU includes y subframes, each subframe includes a delimiter and a data part, the data part includes MPDU, the length of the data part of each subframe is greater than or equal to zero, each subframe The length of the frame delimiter is x, x≥1, x is an integer, y≥2, y is an integer.

For example, the delimiter length x is 4 in the current 802.11n and 802.11ac standards. Assuming that there are N1 MPDUs in total, and the number of subframes in the A-MPDU is N2, then N2 is greater than or equal to N1. Among them, N1 subframes correspond to N1 MPDUs, and the remaining N2-N1 subframes are empty subframes, which function to make the distance between adjacent non-empty subframes meet the preset requirements (the empty subframe is located between two non-empty subframes) Or fill the A-MPDU to a certain length (non-empty subframes are located after all non-empty subframes). Of course, the A-MPDU may only include N1 non-empty subframes without empty subframes, that is, N1=N2. The empty subframe only includes a delimiter and does not include an MPDU, that is, the empty subframe includes a delimiter and a data part with a length of zero, so the length of the empty subframe is fixed x bytes. The multiple subframes refer to an ordered subframe sequence composed of N1 non-empty subframes and possible empty subframes. The length of the data part of the empty subframe is equal to zero, and the length of the data part of the non-empty subframe is greater than zero.

Step 902, if the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then the K subframes perform the second processing, the second processing makes the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y , k is an integer; wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe may include: the length of the tail of the MPDU located in the kth subframe is m The part is moved before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe, so that the part of the data located after the delimiter of the kth subframe and before the k+1th delimiter The length is an integer multiple of x, where 0≤m≤x-1, and m is an integer.

It should be noted that performing the second processing on the subframe refers to processing the passed subframe so that the length of the subframe is an integer multiple of x, where the length of the subframe refers to the length of the delimiter of the subframe and the length of the subframe The sum of the lengths of the data portion between the delimiter and the delimiter of the next subframe. The empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, and the empty subframe is located after the delimiter of the empty subframe The length of the data part before the delimiter of the next subframe and the empty subframe is an integer multiple of x, so there is no need to perform the second processing on the empty subframe.

Step 903: Send the processed A-MPDU to the receiving end, so that the receiving end can analyze and obtain multiple MPDUs according to the processed A-MPDU.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

It is worth noting that the above-mentioned second processing procedure is executed subframe by subframe starting from the first subframe of the A-MPDU, and the execution result of the previous subframe will affect the number of bytes that need to be moved forward when the subsequent subframe is executed. The execution result of the above-mentioned second processing procedure is that for any subframe in the plurality of subframes, a part of its data part is located between the delimiter of its current subframe and the delimiter of the next subframe, and part of its data part The other part is located after the delimiter of the next subframe. Of course, when the kth subframe is an empty subframe and the kth subframe is the last subframe, or the kth subframe is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, because There is no non-empty subframe after the kth subframe, so the part after the delimiter of the next subframe in the data part of the kth subframe does not exist, that is, the data part of the kth subframe is located in the kth subframe after the frame delimiter.

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the second processing of the kth subframe may include: after the delimiter of the kth subframe Add padding bits of length Q after the MPDU of the kth subframe, so that the MPDU of the k-1th subframe is moved to the length of the part after the delimiter of the kth subframe before the MPDU of the kth subframe, padding bits The sum of the length Q of and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer. In other words, when the kth subframe is an empty subframe and the kth subframe is the last subframe, or the kth subframe is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the The processing rule of the kth subframe is different from that of other subframes. Since there is no non-empty subframe following the kth subframe at this time, the kth subframe cannot be shifted backwards, so the method of filling redundant bits can only be used. It should be noted that the empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, and the non-empty subframe is the data subframe. frame.

When k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information; wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the k+1th The sum of the length of the part before the MPDU of the subframe and after the delimiter of the k+1 subframe and the length of the part of the MPDU of the k subframe before the delimiter of the k+1 subframe, the second length The indication information is used to indicate the length of the part where the MPDU of the k-1th subframe is moved before the MPDU of the kth subframe and after the delimiter of the kth subframe. When k=1, the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the definition of the k+1th subframe The sum of the length of the part after the delimiter and the length of the part of the MPDU of the k-th subframe before the delimiter of the k+1-th subframe, the length indicated by the second length indication information is zero. When the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the kth subframe The first length indication information in the delimiter of the frame is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication in the delimiter of the kth subframe The information is used to indicate the length of the part before the MPDU of the k-1th subframe before the MPDU of the kth subframe and after the delimiter of the kth subframe. It should be noted that both the first length indication and the second length indication in the delimiter of the empty subframe are set to zero.

Optionally, the delimiter of each subframe in the multiple subframes may also include a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, Or when the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifier in the delimiter of other subframes except the kth subframe in multiple subframes It is different from the position identifier in the kth subframe delimiter. The purpose of using the location identifier is to identify when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe When is an empty subframe, distinguish the kth subframe from other subframes. Since when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the kth The processing rules of a subframe at the sending end are different from other subframes. Correspondingly, the parsing rules at the receiving end are also different, so special identification is required so that the receiving end adopts different parsing rules for subframes at different positions. For example, in the 802.11ac standard, there is a frame end EoF (English: End of Frame) bit in the delimiter of each subframe, that is, a position identifier. In the embodiment of the present invention, if the kth subframe is a non-empty subframe and the kth subframe When the subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the EoF of the kth subframe can be set to 1 to distinguish other subframes except the kth subframe in the plurality of subframes. The delimiter of each subframe in the multiple subframes further includes a padding identifier used to indicate whether there is a padding bit in each subframe, and the padding identifier and the position identifier may be the same identifier.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 11, another embodiment of the present invention provides a data processing method, which can be used at the receiving end, and the data processing method can include:

Step 1001, receive the A-MPDU sent by the sending end, the A-MPDU includes y subframes, each subframe includes a delimiter and a data part, the length of the data part of each subframe is greater than or equal to zero, and the delimiter of each subframe The length of each is x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, the data part includes the media access control protocol data unit MPDU, and the delimitation of every two subframes The length of the data part between symbols is an integer multiple of x, y≥2, and y is an integer.

Step 1002, sequentially analyze and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, k is an integer, The parsing process includes performing a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, the kth subframe is obtained from the data part of the kth subframe The first part of the MPDU of the frame, the second part of the MPDU of the kth subframe is obtained from the data part of the k+1th subframe, and the first part and the second part are combined to form the MPDU of the kth subframe. At this time, 1 ≤k≤y-1.

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the length of the part after the delimiter of the k+1th subframe is the same as the length of the MPDU of the kth subframe. The sum of the lengths of the parts before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the length of the kth subframe The length of the part after the delimiter.

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Since the embodiment of the present invention reduces the addition of redundant padding bits to the subframe so that the number of bytes in the subframe MPDU is an integer multiple of the number of bytes in the delimiter, the additional overhead of the communication system is reduced, so the resources of the communication system are reduced waste.

Optionally, the delimiter also includes a padding flag, and the parsing process may also include: detecting the padding flag in the kth subframe; performing the first parsing process when the padding flag is detected indicating that there is no stuffing bit in the kth subframe ; When it is detected that the padding flag indicates that there is a padding bit in the kth subframe, the second parsing process is performed on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe , in the data part of the kth subframe, obtain the part whose distance from the delimiter of the kth subframe is e and whose length is f, as the MPDU of the kth subframe, e is the delimiter of the kth subframe f is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length indicated by the first length indication information in the delimiter of the kth subframe.

For example, the filling flag can be indicated by multiplexing the EoF in the 802.11ac delimiter, that is, when the EoF is 1, it means that the current subframe adopts the filling method; otherwise, the tail part of the MPDU of this subframe is moved to the next subframe by itself .

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 12, another embodiment of the present invention provides another data processing method for the sending end and the receiving end. The data processing method may include:

Step 1101, the sender acquires multiple data messages.

For example, the data message may be generated by a communication device connected to the sender, where the communication device may be a computer, or the data message may be generated locally by the sender, which is not limited in this embodiment of the present invention. 802.11ax is a wireless local area network communication standard, and in the 802.11ax, the sender can obtain multiple data messages.

Step 1102, the sender generates multiple MPDUs according to multiple data messages.

The sending end may generate multiple corresponding MPDUs according to the multiple data messages acquired in step 1101, and each MPDU records data corresponding to the data message corresponding to the subframe.

Step 1103, the sender generates an A-MPDU according to multiple MPDUs.

Exemplarily, the A-MPDU may include y subframes, y≥2, and y is an integer. Each subframe includes a delimiter and a data part, the data part may include MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x bytes, x≥1, x is an integer. For example, the length x of the delimiter in the current 802.11n and 802.11ac standards is 4 bytes. It should be noted that, in the 802.11ax communication standard or other communication standards, the length of the delimiter can also be other values, This embodiment of the present invention does not limit this.

The number of the multiple MPDUs may not be equal to the number of subframes in the A-MPDU. Assuming that there are N1 MPDUs in total, and the number of subframes in the A-MPDU is N2, then N2 is greater than or equal to N1. Among them, N1 subframes correspond to N1 MPDUs, and the remaining N2-N1 subframes are empty subframes, which function to make the distance between adjacent non-empty subframes meet the preset requirements (the empty subframe is located between two non-empty subframes) Or fill the A-MPDU to a certain length (non-empty subframes are located after all non-empty subframes). Of course, the A-MPDU may only include N1 non-empty subframes without empty subframes, that is, N1=N2. The empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and a data part with a length of zero, so the length of the empty subframe is fixed x bytes, that is, the length of the delimiter in the empty subframe. A plurality of subframes refers to an ordered subframe sequence composed of N1 non-empty subframes and possible empty subframes, the length of the data part of the empty subframe is equal to zero, and the length of the data part of the non-empty subframe is greater than zero.

Step 1104, the sending end sequentially performs the second processing on the subframes in the multiple subframes to obtain the processed A-MPDU.

It should be noted that performing the second processing on the subframe refers to processing the passed subframe so that the length of the data part located after the delimiter of the current subframe and before the delimiter of the next subframe is an integer of x times, that is, the length of the MPDU of a subframe is an integer multiple of x, where the length of a subframe MPDU refers to the distance from the last byte of the subframe delimiter to the first byte of the next subframe delimiter The length of the data part between. The empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, and the delimiter located in the empty subframe in the empty subframe Thereafter, the length of the data part before the delimiter of the next subframe of the empty subframe is zero, which is an integer multiple of x, so there is no need to perform the second processing on the empty subframe. It should be noted that, in the embodiment of the present invention, a subframe is a non-empty subframe, which means that the subframe is not an empty subframe. If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth subframe Perform the second processing, the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y, k is Integer; It should be noted that when k=y, the kth subframe is the last subframe, since the number of subframes in the A-MPDU is y, there is no k+1th subframe at this time, so The second processing may make the length of the data part of the kth subframe after the delimiter of the kth subframe be an integer multiple of x.

On the one hand, when the kth subframe is a non-empty subframe, there is a k+1th subframe and it is a non-empty subframe, and the data located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe The length of the part is not an integer multiple of x, and the second processing process for the kth subframe may include: moving the part with a length of m at the end of the MPDU of the kth subframe to the MPDU of the k+1th subframe Before and after the delimiter of the k+1th subframe, so that the length of the data part after the delimiter of the kth subframe and before the k+1th delimiter is an integer multiple of x, where 0≤ m≤x-1, m is an integer.

As shown in FIG. 13, the kth subframe and the k+1th subframe are two adjacent subframes, and the kth subframe is a non-empty subframe, and the k+1th subframe is also a non-empty subframe. The k subframe is located before the k+1th subframe, the length of the delimiter of the kth subframe and the k+1th subframe is x, and it is located after the delimiter of the kth subframe. The length of the data part before the delimiter of the k+1th subframe is M. Before the second processing is performed on the kth subframe, it may be determined whether the length M of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is x Integer multiple, if M is an integer multiple of x, the kth subframe is not subjected to the second processing. As shown in Figure 14, if M is not an integer multiple of x, the second processing is performed on the kth subframe. Specifically, the sender can calculate the remainder m of dividing M by x, and place The data part of the tail of the MPDU whose length is m is moved before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe, so that it is located after the delimiter of the kth subframe and after the delimiter of the k+1th subframe. The length of the data part before the delimiter of k+1 subframes is an integer multiple of x. At this time, the data part after the MPDU of the kth subframe and with a length of M-m is the MPDU1 of the kth subframe, and after the delimiter of the k+1th subframe, the data part close to the k+1th subframe The data part with a delimiter and a length of m is the MPDU 2 of the kth subframe, and the MPDU1 and the MPDU2 form the MPDU of the kth subframe.

For example, when the kth subframe is a non-empty subframe, there is a k+1th subframe, and the k+1th subframe is also a non-empty subframe, the delimiter of the kth subframe and the k+1th subframe The length is x bytes, x is equal to 4, the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is M equals to 9 bytes, and 9 is not an integer of 4 Times means that M is not an integer multiple of x. Since M is not an integer multiple of x, that is, the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of the length of the delimiter, so the The k subframes perform the second processing, so that the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is an integer multiple of the length of the delimiter. Because the remainder of M divided by x is equal to 1 (the remainder of 9 divided by 4), the data part of length f at the end of the MPDU of the kth subframe can be moved to before the MPDU of the k+1th subframe, After the delimiter of the k+1 subframe, the length of the data part after the delimiter of the k+1 subframe and before the delimiter of the k+1 subframe is 8 (the difference between 9 and 1 ) is an integer multiple of 4.

Note that the above-mentioned second processing procedure is executed subframe by subframe starting from the first subframe of the A-MPDU, and the execution result of the previous subframe will affect the number of bytes that need to be moved forward when the subsequent subframe is executed. The execution result of the above-mentioned second processing procedure is that for any subframe among the multiple subframes that have undergone the second processing, a part of its data part is located between the delimiter of the current subframe and the delimiter of the next subframe , the other part of its data part is located after the delimiter of the next subframe, of course there are some exceptions, for example, when the kth subframe is an empty subframe and the kth subframe is the last subframe, or the kth subframe When the frame is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, since there is no non-empty subframe after the kth subframe, the data part of the kth subframe is located in the next subframe The part after the delimiter does not exist, that is, the data part of the kth subframe is located after the delimiter of the kth subframe.

For example, if the kth subframe is a non-empty subframe, there is a k+1th subframe, and the k+1th subframe is also a non-empty subframe, before the second processing is performed on the kth subframe, the kth subframe and the The length of the delimiter of the k+1th subframe is x bytes, and x is equal to 4. Assume that the length of the data part after the kth subframe delimiter and before the k+1th subframe delimiter is M is equal to 9 bytes, and 9 bytes is not an integer multiple of 4 bytes, that is, M is not an integer multiple of x. Assume that the length of the data part after the delimiter of the k+1 subframe and before the delimiter of the k+2 subframe is 8 bytes, and 8 bytes is an integer multiple of 4 bytes, that is, the k+th subframe The length of the data part after the delimiter of the k+1th subframe in the MPDU of one subframe is an integer multiple of x. Since the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, the second processing needs to be performed on the kth subframe, and M is divided by x The remainder is equal to 1 (the remainder of dividing 9 by 4), and when the second processing is performed on the kth subframe, the data part with a length of 1 at the end of the MPDU of the kth subframe can be moved to the k+th subframe Before the MPDU of 1 subframe and after the delimiter of the k+1 subframe, the length of the data part after the delimiter of the k subframe and before the delimiter of the k+1 subframe is 8 bytes (the difference between 9 and 1), 8 bytes is an integer multiple of 4 bytes.

Before the second processing is performed on the kth subframe, the length of the data part after the delimiter of the k+1th subframe and before the delimiter of the k+2th subframe is 8 bytes, 8 bytes The section is an integer multiple of 4 bytes; after the second processing of the kth subframe, the data part after the delimiter of the k+1th subframe and before the delimiter of the k+2th subframe The length of 8+1 is equal to 9 bytes, and 9 bytes is not an integer multiple of 4 bytes, that is, after performing the second processing on the kth subframe relative to before performing the second processing on the kth subframe, the The length of the data part after the delimiter of the k+1 subframe and before the delimiter of the k+2 subframe changes.

On the other hand, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe , since there is no non-empty subframe following the kth subframe, only the method of filling redundant bits can be used. At this time, the process of the second processing of the kth subframe may include: calculating the length of the part where the MPDU of the k-1th subframe is moved before the MPDU of the kth subframe and after the delimiter of the kth subframe The remainder of dividing the sum of the length of the MPDU of the k-th subframe by x, and the difference Q between x and the remainder, and adding the length after the MPDU of the k-th subframe after the delimiter of the k-th subframe is the filling bit of Q, so that the MPDU of the k-1th subframe is moved before the MPDU of the kth subframe, the length of the part after the delimiter of the kth subframe, the length Q of the filling bit and the length of the kth subframe The sum of the lengths of the MPDUs is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer.

When the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, for the kth The second processing process of the subframe is different from the second processing process of the kth subframe if the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is a non-empty subframe. Since the kth subframe has no subsequent non-empty subframe to provide it with a forward byte, only the method of filling redundant bits can be used. Before the second processing is performed on the kth subframe, the length and the length of the part after the delimiter of the kth subframe after the MPDU of the k-1th subframe is moved to the MPDU of the kth subframe can be detected. Whether the sum of the MPDU lengths of the kth subframe after the delimiter of the subframe is an integer multiple of x, if after detection, it is known that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, The sum of the length of the part after the delimiter of the kth subframe and the length of the MPDU of the kth subframe after the delimiter of the kth subframe is an integer multiple of x, then the kth subframe is not performed. Two processing. If it is detected, it is known that the MPDU of the k-1th subframe is moved before the MPDU of the kth subframe and the length of the part after the delimiter of the kth subframe is the same as the length of the part after the delimiter of the kth subframe. If the sum of the lengths of the MPDUs of the kth subframe is not an integer multiple of x, the second processing is performed on the kth subframe.

As shown in Figure 15, if the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe frame, the length of the delimiter of the kth subframe is x, and the length of the MPDU of the kth subframe is M, assuming that when the second processing is performed on the k-1th subframe, it will be located in the k-1th subframe The data part with a length of m at the end of the MPDU of the frame is moved before the MPDU of the kth subframe and after the delimiter of the kth subframe, and the data part with a length of m at the end of the MPDU of the k-1th subframe is the MPDU2 of the k-1th subframe. Therefore, the length of the data part after the delimiter of the kth subframe is M+m. If M+m is an integer multiple of x, the kth subframe is not subjected to the second processing. If M+m is not an integer multiple of x, calculate the remainder of dividing M+m by x, and the difference Q between x and the remainder, and place the MPDU of the kth subframe after the delimiter of the kth subframe After the data part of , add a padding bit with a length of Q, so that the MPDU of the k-1th subframe is moved before the MPDU of the kth subframe, the length of the data part after the delimiter of the kth subframe, and the length of the padding bit The sum of lengths of the MPDU and the length of the kth subframe is equal to an integer multiple of x.

It should be noted that, if the length of the data part after the delimiter of the k-1 subframe and before the delimiter of the k-th subframe is an integer multiple of x, there is no need to The frame is subjected to the second processing. At this time, there is no need to move the data part of the length m at the end of the MPDU of the k-1 subframe to after the delimiter of the k subframe and before the MPDU of the k subframe, that is The length of the MPDU of the kth subframe after the delimiter of the kth subframe is M.

For example, the length of the delimiter of each subframe in the plurality of subframes is x equal to 4 bytes, the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe And there is a k+1th subframe and the k+1th subframe is an empty subframe, the length of the data part after the delimiter of the kth subframe is 9 bytes, and 9 bytes is not an integer multiple of 4 bytes. The length of the data part after the delimiter of the kth subframe is divided by the remainder of x equal to 1 (the remainder of 9 divided by 4), and the difference Q between x and the remainder is equal to 3 (the difference between 4 and 1), A padding bit with a length of 3 bytes can be added after the MPDU of the kth subframe, so that the length of the data part after the delimiter of the kth subframe is 12 bytes (the sum of 9 and 3), that is, The length of the data part after the delimiter of the k subframes is equal to an integer multiple of 4 bytes.

It should be noted that when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe When, after the second processing is performed on the subframe before the kth subframe, if the length of the data part after the delimiter of the kth subframe is still an integer multiple of the length x of the delimiter, there is no need to The kth subframe performs the second processing. When the A-MPDU contains only one subframe, that is, when y=1, the process of the second processing of the subframe can refer to when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or When the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the second processing process for the kth subframe, that is, when the subframe is after the delimiter When the length of the data part is not an integer multiple of the length of the delimiter, padding bits are added after the MPDU of the subframe, so that the sum of the length of the MPDU after the delimiter of the subframe and the length of the stuffing bits is the length of the delimiter Integer multiples of .

Further, when the sending end generates an A-MPDU according to multiple MPDUs in step 1103, the A-MPDU may include multiple subframes, and any subframe in the multiple subframes may include a delimiter and an MPDU. In step 1104, while the sending end is performing the second processing on the kth subframe, the sending end may set the delimiter of the kth subframe according to the second processing process on the kth subframe. Exemplarily, when k≧2, the delimiter of the kth subframe may include the first length indication information and the second length indication information.

Specifically, the first length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the kth subframe is moved to before the MPDU of the k+1th subframe, and the delimiter of the k+1th subframe The sum of the length of the following data part and the length of the data part before the delimiter of the k+1 subframe of the MPDU of the kth subframe, the second length indication information in the delimiter of the kth subframe is used The length of the data part after the delimiter of the kth subframe before the MPDU indicating that the k-1th subframe is moved to the kth subframe. It should be noted that when k=1, the length indicated by the first length indication information in the delimiter of the kth subframe is the length of the MPDU of the kth subframe, and the delimiter of the kth subframe The length indicated by the second length indication information in the symbol is zero. If the kth subframe is an empty subframe, the length indicated by the first length indication and the length indicated by the second length indication in the delimiter of the kth subframe are both zero.

Further, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, Since the processing method for the kth subframe is to add padding bits after the MPDU of the kth subframe, at this time, the first length indication information in the delimiter of the kth subframe is used to indicate the kth subframe The length of the data part of the MPDU located after the delimiter of the kth subframe, the second length indication information in the delimiter of the kth subframe is used to indicate that the MPDU of the k-1th subframe is moved to the kth subframe The length of the data part before the MPDU of the frame and after the delimiter of the kth subframe.

Optionally, the delimiter of each subframe may also include a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the location identifiers in the delimiters of other subframes except the kth subframe in multiple subframes are related to the kth subframe The location identifiers in the delimiters are different. Since when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the sending end The processing rules for the kth subframe are different from other subframes, and correspondingly, the parsing rules of the receiving end are also different, so special identification is required so that the receiving end adopts different parsing rules for subframes at different positions. For example, in the 802.11ac standard, there is an EoF (English: End of Frame) bit in the delimiter of each subframe, that is, a position identifier. In the embodiment of the present invention, if the kth subframe is a non-empty subframe and the kth subframe When the subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the EoF of the kth subframe can be set to 1 to distinguish other subframes except the kth subframe in the plurality of subframes.

For example, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, The location identifier may be 1, and when the kth subframe is a subframe other than the kth subframe among the multiple subframes, the location identifier may be 0. It should be noted that when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe frame, on the premise that the location identifiers in the subframe delimiters other than the kth subframe in multiple subframes are different from the location identifiers in the kth subframe delimiter, the location identifier can also be other values , which is not limited in this embodiment of the present invention. Optionally, the delimiter of each subframe in the multiple subframes may further include a padding identifier used to indicate whether there is a padding bit in each subframe, and the padding identifier and the location identifier may be the same identifier.

Step 1105, the sending end sends the processed A-MPDU to the receiving end.

In step 1104, after the sending end sequentially performs the second processing on the subframes in the multiple subframes, the processed AMPDU is obtained. Then, the sending end can send the processed A-MPDU to the receiving end, so that the receiving end can obtain multiple MPDUs by parsing the processed A-MPDU. It should be noted that the processed A-MPDU may include y subframes, each subframe includes a delimiter and a data part, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe Both are x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, the data part includes the media access control protocol data unit MPDU, and the delimiter of every two subframes The length of the data part between is an integer multiple of x, y≥2, and y is an integer.

For example, the first length indication information may be used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe and the length of the part after the delimiter of the k+1th subframe is the same as the length of the part of the kth subframe The sum of the lengths of the parts of the MPDU located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the kth subframe The length of the part after the delimiter of the frame. It should be noted that when there is a padding bit in the kth subframe, the MPDU of the kth subframe is moved to the length of the data part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe is 0, at this time the kth subframe may be the last subframe or the subframe next to the kth subframe is an empty subframe.

Step 1106, the receiving end sequentially analyzes and processes the subframes in the processed A-MPDU to obtain multiple MPDUs.

As shown in Figure 16, the kth subframe is any one of the y subframes, 1≤k≤y, k is an integer, and the process of parsing the kth subframe in step 1106 may include:

Step 11061, the receiving end judges whether there is a padding bit in the kth subframe by detecting the padding flag in the delimiter of the kth subframe. If yes, go to step 11063; if not, go to step 11062.

Since in step 1104, the sending end sets the delimiter of the kth subframe according to the second processing procedure of the kth subframe, the delimiter of the kth subframe may include Whether there is a stuffing flag of stuffing bits in the frame. Therefore, the receiving end can determine whether there is a stuffing bit in the kth subframe by detecting the stuffing flag in the delimiter of the kth subframe.

Step 11062, the receiving end performs the first parsing process on the kth subframe according to the first length indication information and the second length indication information in the delimiter of the kth subframe.

Specifically, the receiving end may obtain the first part of the MPDU of the kth subframe from the data part of the kth subframe, obtain the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and convert The first part and the second part are combined to form the MPDU of the kth subframe, and at this time, 1≤k≤y-1.

First, the receiving end may calculate the sum of the length indicated by the first length indication information in the delimiter of the kth subframe and the length indicated by the second length indication information, and calculate the sum of the length indicated by the length indicated by the second length indication information in the delimiter of the kth subframe The difference between the length indicated by the first length indication information and the length indicated by the second length indication information and m is used as the data part between the delimiter of the k+1th subframe and the delimiter of the kth subframe where m is the remainder of dividing the sum of the length indicated by the first length indication information in the delimiter of the k+1th subframe and the length indicated by the second length indication information by x.

Secondly, the receiving end can determine the k+1th subframe according to the delimiter of the kth subframe and the length of the data part between the delimiter of the k+1th subframe and the delimiter of the kth subframe The position of the delimiter. It should be noted that the length of the data part between the delimiter of the k+1th subframe and the delimiter of the kth subframe is from the last byte in the delimiter of the kth subframe to The length of the data part between the first byte in the delimiter of the k+1th subframe, the position of the delimiter of the kth subframe is the first byte in the delimiter of the kth subframe byte position. Specifically, the receiving end may base on the position of the delimiter of the kth subframe, the length x of the delimiter of the kth subframe, and the delimiter of the k+1th subframe and the delimiter of the kth subframe The length of the data part between the delimiters, determine the distance from the first byte in the delimiter of the kth subframe as the delimiter of the k+1th subframe and the delimitation of the kth subframe The length of the data part between symbols and the position of the sum of x is the position of the delimiter of the k+1th subframe, that is, the position of the first byte in the delimiter of the k+1th subframe .

After determining the position of the delimiter of the k+1th subframe, determine the starting position of the data part of the k+1th subframe according to the length of the delimiter of the k+1th subframe, specifically Yes, the start position of the data part of the k+1th subframe is a position with a length of x-1 between the first byte of the delimiter of the k+1th subframe. The receiving end can obtain the delimiter close to the k+1 subframe from the data part of the k+1 subframe, and the data part with a length of m (that is, the data part of the k+1 subframe near m bytes before), as the second part of the MPDU of the kth subframe; and according to the first length indication information and m in the delimiter of the kth subframe, from the data part of the kth subframe , get the data part close to the delimiter of the k+1th subframe and the length is w (that is, the last w bytes in the data part of the kth subframe), as the first part of the MPDU of the kth subframe , w is the difference between the length indicated by the first length indication information and m.

It should be noted that when k=1, since there is no subframe before the first subframe before processing, that is, the data part of the first subframe does not include the MPDU tail of the previous subframe moved to the first subframe The data part of the frame, therefore, the length indicated by the first length indication information in the delimiter of the kth subframe is the length of the MPDU of the kth subframe, and the length of the MPDU in the delimiter of the kth subframe The length indicated by the two-length indication information is zero.

After the first part and the second part of the MPDU of the kth subframe are acquired, the first part and the second part of the MPDU of the kth subframe may be combined to form the MPDU of the kth subframe.

Step 11063: The receiving end performs a second parsing process on the kth subframe according to the first length indication information and the second length indication information in the delimiter of the kth subframe.

Specifically, the receiving end may acquire the MPDU of the kth subframe in the data part of the kth subframe.

It should be noted that when there is a padding bit in the kth subframe, the MPDU of the kth subframe is moved to the length of the data part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe is 0, at this time the kth subframe may be the last subframe or thereafter be empty subframes. If there is a padding bit in the kth subframe, at this time, the length indicated by the first length indication information in the delimiter of the kth subframe is the length of the MPDU of the kth subframe, and the length of the MPDU of the kth subframe The length indicated by the second length indication information in the delimiter is the length of the data part before the MPDU of the kth subframe after the k-1th subframe is moved to the kth subframe's delimiter, and the receiving end can according to The first length indication information and the second length indication information in the delimiter of the kth subframe, in the data part of the kth subframe, the distance from the delimiter of the kth subframe is e, and the length is The data part of f, as the MPDU of the kth subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the first length in the delimiter of the kth subframe Indicates the length indicated by the message.

For example, as shown in FIG. 15 , there are stuffing bits in the kth subframe after the processing, and when the second processing is performed on the k-1th subframe, in the data part of the k-1th subframe, the length is m The data part of the kth subframe is moved after the delimiter of the kth subframe and before the MPDU of the kth subframe. The length of the MPDU of the kth subframe is M. At this time, the delimiter of the kth subframe The length indicated by the length indication information is the length M of the MPDU of the kth subframe, and the length indicated by the second length indication information of the kth subframe is the fixed time when the k-1th subframe is moved to the kth subframe. The length m of the data part after the delimiter and before the MPDU of the kth subframe. Therefore, the receiving end can acquire the distance from the delimiter of the kth subframe in the data part of the kth subframe according to the first length indication information and the second length indication information in the delimiter of the kth subframe is m, and the data part whose length is M is used as the MPDU of the kth subframe.

Step 1107, the receiving end obtains multiple data messages according to multiple MPDUs.

Specifically, since in step 1102, the sending end generates multiple corresponding MPDUs according to multiple data messages, and data corresponding to the data message corresponding to the subframe is recorded in each MPDU, so in step 1107, the receiving end acquires After the multiple MPDUs, multiple data messages can be obtained according to the multiple MPDUs.

It should be noted that before the sending end sequentially performs the second processing on the subframes in the multiple subframes, if the distance between two adjacent subframes in the multiple subframes is less than the preset distance, it is necessary to One or more empty subframes are inserted between them, so that the distance between two adjacent subframes reaches the preset distance requirement. The empty subframes only include delimiters and do not include MPDUs, that is, empty subframes include delimiters and zero-length data. part, so the length of the empty subframe is fixed x bytes. The distance between two adjacent subframes, defined as the byte distance between the MPDU start positions of two subframes, that is, from the position of the last byte in the delimiter of the previous subframe to the next subframe The distance between the position of the last byte in the delimiter. A subframe containing an MPDU is called a data subframe. After inserting one or more empty subframes between two data subframes, the previous data subframe of the two data subframes is called a previous subframe, indicating that the subframe It is a data subframe and the subframe after this subframe is an empty subframe; the latter data subframe in the two data subframes is called a subsequent subframe, which means that this subframe is a data subframe and the subframe before this subframe A frame is an empty subframe, and a data subframe is a non-empty subframe. When the sending end sequentially performs the second processing on the subframes in the multiple subframes, the sending end may also detect whether the currently processed kth subframe is a previous subframe.

Further, when performing the second processing for the kth subframe among the plurality of subframes, if the kth subframe is a previous subframe, that is, the kth subframe is a non-empty subframe and there is a k+1th subframe and the kth subframe is The k+1 subframe is an empty subframe, and the process of the second processing of the previous subframe can refer to when the kth subframe is a non-empty subframe and the kth subframe is the last subframe in step 504, or the kth subframe is a non-empty subframe. When there is an empty subframe and the k+1th subframe exists and the k+1th subframe is an empty subframe, the second processing procedure for the kth subframe. Specifically, since the next subframe of the previous subframe is an empty subframe, there is no subsequent subframe to provide the forward byte to the previous subframe, so the method of filling redundant bits can only be used to perform the second processing on the previous subframe Before, it can be detected whether the length of the data part after the delimiter of the previous subframe is an integer multiple of x, if the length of the data part after the delimiter of the previous subframe is an integer multiple of x, then no The second processing needs to be performed on the preceding subframe. If the length of the data part after the delimiter of the previous subframe is not an integer multiple of x, a padding bit is added after the MPDU after the delimiter of the previous subframe, so that the length of the stuffing bit is the same as that of the previous subframe. The sum of the lengths of MPDUs after the frame delimiter is equal to an integer multiple of x. Since the next subframe of the first subframe is an empty subframe, the empty subframe only includes the delimiter and does not include the MPDU, that is, the empty subframe includes the delimiter and the data part with a length of zero, so the length of the empty subframe is fixed x bytes, the data part after the delimiter of the empty subframe and before the delimiter of the next subframe of the empty subframe is zero, which is an integer multiple of x, so there is no need to perform the next subframe of the previous subframe The second processing can continue to perform the second processing on the following subframes according to the order of the multiple subframes. When processing to the next subframe, you can refer to when the kth subframe is a non-empty subframe and there is a k+1th subframe And when it is a non-empty subframe, the process of the second processing of the kth subframe, that is, the processing of the subsequent subframe does not need special treatment.

As shown in Figure 9, the number of bytes of the delimiter of each subframe in 802.11ac is 4, and one byte is 8 bits. Therefore, there are 32 bits in the delimiter, and the information included in it includes position identification , MPDU length indication, cyclic redundancy code (English: Cyclic Redundancy Code; abbreviation: CRC) and MPDU feature bits, wherein, the position identifier occupies 1 bit in the delimiter, the MPDU length indication occupies 14 bits, and the CRC occupies 8 bits. The MPDU flag occupies 8 bits, so there is one reserved bit left in the delimiter, and the reserved bit is empty. The location identifier, reserved bits, MPDU length indication, CRC and MPDU flag bits are arranged in sequence.

Assume that the delimiter in this embodiment is implemented by modifying the format of the 802.11ac delimiter, that is, the delimiter includes the first length indication information and the second length indication information. When x is equal to 4, the first length indication information and the second length indication information in the delimiter of the subframe need to be in the subframe when setting the delimiter of the subframe in the four indication modes. On the basis of the delimiter of the corresponding atomic frame, two idle bits are extracted, and the first length indication information and the second length indication information in the delimiter of the subframe can respectively occupy the two idle bits and the original The 14 bits occupied by the MPDU length indication, or the first length indication information and the second length indication information may respectively occupy the 14 bits occupied by the original MPDU length indication and the two idle bits. Preferably, the number of bits allocated for the first length indication information should be greater than the number of bits allocated for the second length indication information, and the MPDU length indication occupied by the first length indication information may be allocated 14 bits, the two idle bits are allocated for the second length indication information. It should be noted that when allocating the 14 bits occupied by the MPDU length indication and the two idle bits for the first length indication information and the second length indication information, other methods can also be used. Without limitation, there is only one free bit left in the 802.11ac delimiter, so another free bit needs to be obtained to form two free bits. For example, the following methods can be used to obtain 2 idle bits for carrying the second length indication information.

Exemplarily, the delimiter of each subframe also includes a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe frame and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the delimiters of other subframes except the kth subframe in multiple subframes are delimited by the kth subframe The location identifiers in the symbols are different.

In 802.11ac, only one idle bit is left in the delimiter of the subframe, and the second length indication information needs two bits to bear. Therefore, 2 idle bits can be obtained through the following methods to carry the second length indication information.

In the first aspect, the two free bits can be a reserved bit in the delimiter of the atomic frame corresponding to the subframe and any 8 bits occupied by the second feature indicator, and the position identifier of the subframe can occupy the 1 bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe.

For example, as shown in Figure 9-1, the two free bits can be a reserved bit in the delimiter of the atomic frame corresponding to the subframe and a reserved bit in the delimiter of the atomic frame corresponding to the subframe. Any 1 bit among the 8 bits occupied by the second feature indication, the position identifier of the subframe may occupy 1 bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe.

As shown in Figure 9-2, the two free bits can be 1 bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe and one of the delimiters of the atomic frame corresponding to the subframe Bits are reserved, and the position identifier in the subframe delimiter may occupy any one of the 8 bits occupied by the second feature indication in the delimiter of the atomic frame corresponding to the subframe.

As shown in Figure 9-3, the two free bits can be reserved for one bit in the delimiter of the atomic frame corresponding to the subframe and the second feature in the delimiter of the atomic frame corresponding to the subframe Indicates any 1 of the 8 bits occupied. And move the 14 bits occupied by the MPDU length indication and the 8 bits occupied by the first feature indication backward by one bit, and the position identifier of the subframe can occupy the position identifier in the delimiter of the atomic frame corresponding to the subframe. 1 bit occupied.

In the second aspect, as shown in Figure 9-4, the two free bits can be a reserved bit and a bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe. At this time, the subframe The second characteristic indication of the corresponding atomic frame is used to indicate the position of the subframe. For example, the second characteristic indication may be: 01001011, 10110100, etc., wherein, when the second characteristic indication in the delimiter of the subframe is set to 01001011, it means that the subframe is a non-empty subframe and the subframe is the last subframe, or the subframe is a non-empty subframe and there is a next subframe in the subframe and the next subframe is an empty subframe.

In the third aspect, the two free bits may be any 2 bits in the 8 bits occupied by the first characteristic indication in the delimiter of the atomic frame corresponding to the subframe or any 2 bits in the 14 bits occupied by the MPDU length indication, The position identifier of the subframe may occupy 1 bit occupied by the position identifier in the delimiter of the atomic frame corresponding to the subframe. As shown in Figure 9-5, in the 802.11ah mechanism, the first feature indication in the subframe delimiter only needs to occupy four bits. Similarly, the CRC can also be shortened here, for example, using 6 bits CRC. In this way, the 2 bits saved by the CRC can be used to carry the second length indication information.

It should be noted that the delimiter of the kth subframe may also include a padding flag, which may be indicated by multiplexing the EoF in the 802.11ac delimiter, that is, when the EoF is 1, it means that the current subframe adopts the padding method ; Otherwise, the tail data part of the MPDU of this subframe is moved to the next subframe by itself. In the structure of the delimiter of the kth subframe shown in FIG. 9-5 , the padding identifier may occupy a reserved bit in the delimiter of the atomic frame corresponding to the kth subframe. For example, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, The filling flag of the kth subframe may be set to "filling", which is used to indicate that there are filling bits in the kth subframe. It should be noted that, the form of the filling identifier of the kth subframe may also be in other forms, which is not limited in this embodiment of the present invention.

In the embodiment of the present invention, in step 1104, during the process of performing the second processing on the subframes in the multiple subframes sequentially by the sending end, if the kth subframe is an empty subframe, since the empty subframe is located after the delimiter of the empty subframe The length of the data part before the delimiter of the subframe next to the empty subframe is zero, which is an integer multiple of the length of the delimiter, so there is no need to perform the second processing on the empty subframe. When setting the delimiter of each subframe in the plurality of subframes, the second length indication information and the second length indication information are set in the delimiter of each subframe, and the delimiter of the empty subframe Both the second length indication information and the length indicated by the second length indication information are zero. When the receiving end in step 1106 parses the subframes in the processed A-MPDU in turn, it only needs to obtain the second length indication information and the second length indication information in the delimiter of each subframe. Subframes are parsed.

Optionally, in step 1104, when the sending end sequentially performs the second processing on the subframes in the multiple subframes, it may detect whether the currently processed subframe is an empty subframe, and if the currently processed subframe is an empty subframe, then it is not true. Empty subframe is processed; If the subframe of current processing is non-empty subframe, then judge whether to need to carry out second processing to current subframe, if need to carry out second processing to current subframe, then can refer to the second processing of subframe in step 1104 2. The specific process of treatment. And if the subframe is an empty subframe, the delimiter of the empty subframe is not set, that is, the format of the delimiter in the empty subframe is the same as in the prior art; if the subframe is a non-empty subframe, then the delimiter in the subframe Set the second length indication information and the second length indication information in . In step 1106, when the receiving end parses the processed A-MPDU, it can first detect whether the current subframe is an empty subframe. The parsing method parses the subframe. If the current subframe is a non-empty subframe, the current subframe may be analyzed by referring to the specific analysis method for subframes in step 1106 .

To sum up, in the data processing method provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 17, the embodiment of the present invention provides a data processing device 160, which can be used at the sending end, and the data processing device 160 can include:

The generating unit 1601 is configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the data The part includes MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, y≥2, y is an integer.

The first processing unit 1602 is configured to be a non-empty subframe in the kth subframe, and the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer of x When multiple times, the first processing is performed on the kth subframe, the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y, k is an integer.

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe may include: shifting the part of the head of the MPDU located in the k+1th subframe whose length is m After the MPDU of the k-th subframe after the delimiter of the k-th subframe, before the delimiter of the k+1-th subframe, so that after the delimiter of the k-th subframe, the k+1-th subframe The length of the data part before the delimiter is an integer multiple of x, where, 0<m≤x-1, m is an integer.

The sending unit 1603 is configured to send the processed A-MPDU to the receiving end, so that the receiving end can analyze and obtain multiple MPDUs according to the processed A-MPDU.

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the first processing procedure for the kth subframe may include:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the kth subframe after the delimiter of the kth subframe The sum of the lengths of the MPDUs is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer.

When k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information.

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth subframe. The length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the delimitation of the k+1th subframe The length of the part before the break.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe the length of the section.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframes, the second length indication information is used to indicate the length of the part of the MPDU of the k th subframe after the delimiter of the k th subframe.

To sum up, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 18, the embodiment of the present invention provides another data processing device 170, which can be used at the sending end, and the data processing device 170 can include:

The generating unit 1701 is configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the data The part includes MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, y≥2, and y is an integer.

The second processing unit 1702 is configured to be a non-empty subframe in the kth subframe, and the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer of x When multiple times, the second processing is performed on the kth subframe, the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤y, k is an integer.

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe may include: moving the part of length m at the end of the MPDU of the kth subframe to the kth subframe Before the MPDU of the +1 subframe and after the delimiter of the k+1th subframe, the length of the data part located after the delimiter of the kth subframe and before the k+1th delimiter is an integer of x Times, where, 0≤m≤x-1, m is an integer.

The sending unit 1703 is configured to send the processed A-MPDU to the receiving end, so that the receiving end can analyze and obtain multiple MPDUs according to the processed A-MPDU.

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the second processing of the kth subframe may include:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit of length Q is added, so that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the kth subframe The sum of the length of the part after the delimiter, the length Q of stuffing bits and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer.

When k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information.

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the length of the part after the delimiter of the k+1th subframe is the same as the length of the MPDU of the kth subframe. The sum of the lengths of the parts before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the length of the kth subframe The length of the part after the delimiter.

The delimiter of each subframe may also include a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and When there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the subframe delimiters other than the kth subframe in the multiple subframes are the same as those in the kth subframe delimiter The location identifiers are different.

The delimiter of each subframe may also include a stuffing flag used to indicate whether there is a stuffing bit in each subframe.

In summary, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 19, the embodiment of the present invention provides another data processing device 180, which can be used at the receiving end. The data processing device 180 can include:

The receiving unit 1801 is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the length of the data part of each subframe are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, and the data part includes the media access control protocol In the data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer.

The parsing unit 1802 is configured to sequentially parse and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, k is an integer, and the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, obtain the first length from the data part of the k-1th subframe The first part of the MPDU of the k subframe, the second part of the MPDU of the kth subframe is obtained from the data part of the kth subframe, and the first part and the second part are combined to form the MPDU of the kth subframe. At this time, 2 ≤k≤y.

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth subframe. The length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the delimitation of the k+1th subframe The length of the part before the break. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe the length of the section. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframes, the second length indication information is used to indicate the length of the part of the MPDU of the k th subframe after the delimiter of the k th subframe.

To sum up, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in Figure 20, the embodiment of the present invention provides another data processing device 190, which can be used at the receiving end, and the data processing device 190 can include:

The receiving unit 1901 is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the length of the data part of each subframe are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, and the data part includes the media access control protocol In the data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer.

The parsing unit 1902 is configured to sequentially parse and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, k is an integer, as shown in Figure 21, the parsing unit 1902 may include:

The first parsing unit 19021 is configured to perform a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the data part of the kth subframe Obtain the first part of the MPDU of the kth subframe, obtain the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and combine the first part and the second part to form the kth subframe. MPDU, at this time 1≤k≤y-1.

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the length of the part after the delimiter of the k+1th subframe is the same as the length of the MPDU of the kth subframe. The sum of the lengths of the parts before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the length of the kth subframe The length of the part after the delimiter.

The delimiter may also include a padding identifier. As shown in FIG. 22, the parsing unit 1902 may include:

The detecting unit 19022 is configured to detect the filling indicator in the kth subframe.

The first parsing unit 19021 is specifically configured to perform the first parsing process on the kth subframe when the detecting unit detects that there is no stuffing bit in the kth subframe.

The second parsing unit 19023 is configured to perform a second parsing process on the kth subframe when the detection unit detects that the padding flag indicates that there is a padding bit in the kth subframe: according to the first in the delimiter of the kth subframe The length indication information and the second length indication information, in the data part of the kth subframe, obtain the part with a distance of e from the delimiter of the kth subframe and a length of f, as the MPDU of the kth subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length indicated by the first length indication information in the delimiter of the kth subframe.

In summary, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

An embodiment of the present invention provides a data processing system. The data processing system may include: a sending end and a receiving end. The sending end may include the data processing apparatus shown in FIG. 17 or FIG. 18 . The receiving end may include the data processing device shown in FIG. 19 or FIG. 20 .

To sum up, in the data processing system provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, or the sender moves some bytes at the end of the MPDU of the previous subframe to the head of the MPDU of the next subframe, so that after the delimiter of the previous subframe, the next subframe The length of the data part before the delimiter of the frame is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 23, another embodiment of the present invention provides a data processing device 210, which can be used at the sending end, and the data processing device 210 can include:

Processor 2101 (one or more), configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, A-MPDU includes y subframes, and each subframe includes delimited Delimiter and data part, the data part includes MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, y≥2, y is an integer.

The processor 2101 is also used when the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , perform the first processing on the kth subframe, the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤ k≤y, k is an integer.

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe may include: shifting the part of the head of the MPDU located in the k+1th subframe whose length is m After the MPDU of the k-th subframe after the delimiter of the k-th subframe, before the delimiter of the k+1-th subframe, so that after the delimiter of the k-th subframe, the k+1-th subframe The length of the data part before the delimiter is an integer multiple of x, where, 0<m≤x-1, m is an integer.

The sender 2102 is configured to send the processed A-MPDU to the receiving end, so that the receiving end can analyze and obtain multiple MPDUs according to the processed A-MPDU.

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the first processing procedure for the kth subframe may include:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the kth subframe after the delimiter of the kth subframe The sum of the lengths of the MPDUs is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer.

When k≥2, the delimiter of the kth subframe may include the first length indication information and the second length indication information.

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth subframe. The length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the delimitation of the k+1th subframe The length of the part before the break.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe the length of the section.

Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframes, the second length indication information is used to indicate the length of the part of the MPDU of the k th subframe after the delimiter of the k th subframe.

To sum up, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 24, another embodiment of the present invention provides another data processing device 220, which can be used at the sending end. The data processing device 220 can include:

Processor 2201 (one or more), configured to generate an aggregated media access control protocol data unit A-MPDU according to multiple media access control protocol data units MPDU, A-MPDU may include y subframes, and each subframe may include Delimiter and data part, the data part can include MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, y≥2, y is an integer.

The processor 2201 is also used when the kth subframe is a non-empty subframe, and the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , the second processing is performed on the kth subframe, the second processing makes the length of the data part located after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤ k≤y, k is an integer.

Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe may include: moving the part of length m at the end of the MPDU of the kth subframe to the kth subframe Before the MPDU of the +1 subframe and after the delimiter of the k+1th subframe, the length of the data part located after the delimiter of the kth subframe and before the k+1th delimiter is an integer of x Times, where, 0≤m≤x-1, m is an integer.

The sender 2202 is configured to send the processed A-MPDU to the receiving end, so that the receiving end can analyze and obtain multiple MPDUs according to the processed A-MPDU.

When the kth subframe is the last subframe or the k+1th subframe exists and is an empty subframe, the process of the second processing of the kth subframe may include:

After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit of length Q is added, so that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the kth subframe The sum of the length of the part after the delimiter, the length Q of stuffing bits and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0<Q≤x-1, and Q is an integer.

When k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information.

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the length of the part after the delimiter of the k+1th subframe is the same as the length of the MPDU of the kth subframe. The sum of the lengths of the parts before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the length of the kth subframe The length of the part after the delimiter.

The delimiter of each subframe may also include a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe and When there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the subframe delimiters other than the kth subframe in the multiple subframes are the same as those in the kth subframe delimiter The location identifiers are different.

The delimiter of each subframe may also include a stuffing flag used to indicate whether there is a stuffing bit in each subframe.

In summary, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 25, another embodiment of the present invention provides another data processing device 230, which can be used at the receiving end, and the data processing device 230 can include:

The receiver 2301 is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sender, the A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the length of the data part of each subframe are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, and the data part includes the media access control protocol In the data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer.

Processor 2302 (one or more), configured to sequentially analyze and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1 ≤k≤y, k is an integer, and the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the k-1th subframe Obtain the first part of the MPDU of the kth subframe from the data part of the kth subframe, obtain the second part of the MPDU of the kth subframe from the data part of the kth subframe, combine the first part and the second part to form the kth subframe MPDUs, at this time 2≤k≤y.

Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the kth subframe. The length of the part after the MPDU of 1 subframe and before the delimiter of the kth subframe. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the part after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the delimitation of the k+1th subframe The length of the part before the break. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe the length of the section. Or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the MPDU of the k-1th subframe, and the length of the part before the delimiter of the kth subframe is the same as the MPDU of the kth subframe. The sum of the lengths of the parts after the delimiter of the k subframes, the second length indication information is used to indicate the length of the part of the MPDU of the k th subframe after the delimiter of the k th subframe.

To sum up, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, so that the length of the data part after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

As shown in FIG. 26, another embodiment of the present invention provides another data processing device 240, which can be used at the receiving end. The data processing device 240 can include:

The receiver 2401 is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sender, the A-MPDU includes y subframes, each subframe includes a delimiter and a data part, and the length of the data part of each subframe are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, the delimiter includes the first length indication information and the second length indication information, and the data part includes the media access control protocol In the data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer.

Processor 2402 (one or more), configured to sequentially analyze and process the subframes in the multiple subframes in units of length x to obtain multiple MPDUs, wherein the kth subframe is any one of the y subframes, 1 ≤k≤y, k is an integer, as shown in Figure 21,

The processor 2402 is also configured to perform a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, obtain from the data part of the kth subframe The first part of the MPDU of the kth subframe, the second part of the MPDU of the kth subframe is obtained from the data part of the k+1th subframe, and the first part and the second part are combined to form the MPDU of the kth subframe, At this time, 1≤k≤y-1.

Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved before the MPDU of the k+1th subframe, and the length of the part after the delimiter of the k+1th subframe is the same as the length of the MPDU of the kth subframe. The sum of the lengths of the parts before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved to before the MPDU of the kth subframe, and the length of the kth subframe The length of the part after the delimiter.

Padding flags can also be included in the delimiter.

The processor 2402 is further configured to detect a stuffing flag in the kth subframe.

The processor 2402 is also specifically configured to perform the first parsing process on the kth subframe when the detection unit detects that there is no stuffing bit in the kth subframe.

The processor 2402 is also configured to perform a second parsing process on the kth subframe when the detection unit detects that the padding flag indicates that there is a stuffing bit in the kth subframe: according to the first length indication in the delimiter of the kth subframe information and the second length indication information, in the data part of the kth subframe, obtain the part whose distance from the delimiter of the kth subframe is e, and the length is f, as the MPDU of the kth subframe, e is The length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length indicated by the first length indication information in the delimiter of the kth subframe.

In summary, in the data processing device provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves some bytes at the end of the MPDU of the previous subframe to the next subframe The head of the MPDU, so that the length of the data part located after the delimiter of the previous subframe and before the delimiter of the next subframe is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

An embodiment of the present invention provides a data processing system. The data processing system may include: a sending end and a receiving end. The sending end may include the data processing apparatus shown in FIG. 23 or FIG. 24 . The receiving end may include the data processing device shown in FIG. 25 or FIG. 26 .

To sum up, in the data processing system provided by the embodiment of the present invention, for two adjacent subframes of the A-MPDU, the sender moves forward some bytes of the MPDU header of the subsequent subframe to the previous subframe. The end of the MPDU of the frame, or the sender moves some bytes at the end of the MPDU of the previous subframe to the head of the MPDU of the next subframe, so that after the delimiter of the previous subframe, the next subframe The length of the data part before the delimiter of the frame is an integer multiple of the length of the delimiter. Compared with the prior art, the number of bytes of the data part between the delimiters of the two subframes is an integer multiple of the number of bytes in the delimiters by adding redundant padding bits after the MPDU of the subframe. The embodiment of the invention can also make the number of bytes of the data part between the delimiters of the two subframes be an integer multiple of the number of bytes in the delimiters, and reduce the number of redundant padding bits added to the subframes, which is convenient This enables the receiving end to analyze the A-MPDU processed by the sending end uniformly in units of the number of bytes in the delimiter, which reduces the additional overhead of the communication system, thus reducing the waste of communication system resources.

All the above optional technical solutions can be combined in any way to form an optional embodiment of the present invention, which will not be repeated here.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

It should be noted that the order of the steps of the data processing method provided by the embodiment of the present invention can be appropriately adjusted, and the steps can also be increased or decreased accordingly according to the situation. Anyone familiar with the technical field within the technical scope disclosed in the present invention, Changes that can be easily thought of should be covered within the protection scope of the present invention, and thus will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

Claims (23)

1. A data processing method, characterized in that, for the sending end, the data processing method comprises: Generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, the The data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, and y≥ 2, y is an integer; If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth Subframes perform the first processing, the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤ y, k are integers; Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe includes: moving the part of the length m of the head of the MPDU located in the k+1th subframe to After the MPDU of the kth subframe after the delimiter of the kth subframe, before the delimiter of the k+1th subframe, so that after the delimiter of the kth subframe, the The length of the data part before the delimiter of the k+1th subframe is an integer multiple of x, wherein, 0<m≤x-1, m is an integer; and sending the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by parsing the processed A-MPDU. 2. The data processing method according to claim 1, further comprising: when the kth subframe is the last subframe or there is the k+1th subframe and is an empty subframe, the The process of the first processing of the kth subframe includes: After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the MPDU located in the kth subframe The sum of the lengths of the MPDUs of the kth subframe after the delimiter is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer. 3. The data processing method according to claim 1 or 2, characterized in that, When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information; Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to the The length of the part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the The length of the part after the MPDU of the k-1 subframe and before the delimiter of the kth subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is located in the kth subframe The length of the part after the delimiter of subframes. 4. A data processing method, characterized in that, for the sending end, the data processing method comprises: Generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, the The data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, y≥2, y is an integer; If the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x, then for the kth Subframes carry out the second processing, the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be an integer multiple of x, 1≤k≤ y, k are integers; Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe includes: moving the part with a length of m at the end of the MPDU of the kth subframe to the k+th subframe Before the MPDU of 1 subframe and after the delimiter of the k+1th subframe, the length of the data part after the delimiter of the kth subframe and before the k+1th delimiter is an integer multiple of x , where, 0≤m≤x-1, m is an integer; and sending the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by parsing the processed A-MPDU. 5. The data processing method according to claim 4, further comprising: when the kth subframe is the last subframe or there is the k+1th subframe and is an empty subframe, the The process of the second processing of the kth subframe includes: After the MPDU of the kth subframe located after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the MPDU of the k-1th subframe is moved to the MPDU of the kth subframe The sum of the length of the part before and after the delimiter of the kth subframe, the length Q of the padding bit, and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0< Q≤x-1, Q is an integer. 6. The data processing method according to claim 4 or 5, characterized in that, When k≥2, the delimiter of the kth subframe includes the first length indication information and the second length indication information' Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe. 7. The data processing method according to claim 6, wherein: The delimiter of each subframe also includes a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe When there is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the delimiters of other subframes in the multiple subframes except the kth subframe are consistent with the The location identifiers in the kth subframe delimiter are different. 8. The data processing method according to claim 6 or 7, characterized in that, The delimiter of each subframe further includes a stuffing flag used to indicate whether there are stuffing bits in each subframe. 9. A data processing method, characterized in that, for the receiving end, the data processing method includes " Receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of the subframes includes a delimiter and a data part, and the data part of each of the subframes The lengths are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second length indication information, so The data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer; Analyzing and processing the subframes in the plurality of subframes in units of length x in order to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, and k is an integer , the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, the data part of the k-1th subframe is obtained from the The first part of the MPDU of the kth subframe is obtained, the second part of the MPDU of the kth subframe is obtained from the data part of the kth subframe, and the first part and the second part are combined to form The MPDU of the kth subframe, at this time 2≤k≤y; Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate the length of the kth subframe The length of the part where the MPDU is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located at the delimiter of the kth subframe The sum of the lengths of the following parts, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the location of the k+1th subframe The length of the part before the delimiter; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe, and the location of the kth subframe The sum of the length of the part before the delimiter and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate that the kth subframe The length of the part where the MPDU of the frame is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located in the kth subframe sum of the lengths of the part after the delimiter, and the second length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe. 10. A data processing method, characterized in that, for a receiving end, the data processing method comprises: Receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of the subframes includes a delimiter and a data part, and the data part of each of the subframes The lengths are greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second length indication information, so The data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer; Analyzing and processing the subframes in the plurality of subframes in units of length x in order to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤y, and k is an integer , the parsing process includes performing a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the kth subframe Obtaining the first part of the MPDU of the kth subframe in the data part, obtaining the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and combining the first part with the The two parts are combined to form the MPDU of the kth subframe, at this time 1≤k≤y-1; Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe. 11. The data processing method according to claim 10, characterized in that, The delimiter also includes a filling identifier, and the parsing process also includes: Detecting a filling identifier in the kth subframe; Executing the first parsing process when it is detected that the padding flag indicates that the padding bit does not exist in the kth subframe; When it is detected that the padding flag indicates that the padding bit exists in the kth subframe, the second parsing process is performed on the kth subframe: according to the first in the delimiter of the kth subframe In the length indication information and the second length indication information, in the data part of the kth subframe, the part with a distance of e from the delimiter of the kth subframe and a length of f is obtained as the part of the kth subframe For the MPDU of the k subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length indicated by the first length indication information in the delimiter of the kth subframe indicated length. 12. A data processing device, characterized in that the data processing device is used for a sending end, and the device comprises: A generating unit, configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, and each of the subframes includes a delimiter and A data part, the data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x bytes, x≥1, x is an integer, y≥2, and y is an integer; The first processing unit is configured to be a non-empty subframe in the kth subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , the first processing is performed on the kth subframe, and the first processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be x Integer multiple, 1≤k≤y, k is an integer; Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the first processing of the kth subframe includes: moving the part of the length m of the head of the MPDU located in the k+1th subframe to After the MPDU of the kth subframe after the delimiter of the kth subframe, before the delimiter of the k+1th subframe, so that after the delimiter of the kth subframe, the The length of the data part before the delimiter of the k+1th subframe is an integer multiple of x, wherein, 0<m≤x-1, m is an integer; The sending unit is configured to send the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by analyzing the processed A-MPDU. 13. The data processing device according to claim 12, wherein when the kth subframe is the last subframe or there is a k+1th subframe and is an empty subframe, the kth subframe's A treatment process includes: After the MPDU of the kth subframe after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the length Q of the padding bit is the same as that of the MPDU located in the kth subframe The sum of the lengths of the MPDUs of the kth subframe after the delimiter is equal to an integer multiple of x, where 0<Q≤x−1, and Q is an integer. 14. The data processing device according to claim 12 or 13, wherein: When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information; Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to the The length of the part after the MPDU of the kth subframe and before the delimiter of the k+1th subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is moved to the The length of the part after the MPDU of the k-1 subframe and before the delimiter of the kth subframe; Alternatively, the first length indication information is used to indicate that the MPDU of the kth subframe is moved after the MPDU of the k-1th subframe and before the delimiter of the kth subframe. The sum of the lengths of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the MPDU of the kth subframe is located in the kth subframe The length of the part after the delimiter of subframes. 15. A data processing device, characterized in that, the data processing device is used for a sending end, and the device comprises: A generating unit, configured to generate an aggregated media access control protocol data unit A-MPDU according to a plurality of media access control protocol data units MPDU, the A-MPDU includes y subframes, and each of the subframes includes a delimiter and A data part, the data part includes the MPDU, the length of the data part of each subframe is greater than or equal to zero, and the length of the delimiter of each subframe is x, where x≥1, and x is an integer , y≥2, y is an integer; The second processing unit is used for the kth subframe is a non-empty subframe, and the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe is not an integer multiple of x , the second processing is performed on the kth subframe, and the second processing makes the length of the data part after the delimiter of the kth subframe and before the delimiter of the k+1th subframe be x Integer multiple, 1≤k≤y, k is an integer; Wherein, when there is a k+1th subframe and it is a non-empty subframe, the process of the second processing of the kth subframe includes: moving the part with a length of m at the end of the MPDU of the kth subframe to the k+th subframe Before the MPDU of 1 subframe and after the delimiter of the k+1th subframe, the length of the data part after the delimiter of the kth subframe and before the k+1th delimiter is an integer multiple of x , where, 0≤m≤x-1, m is an integer; The sending unit is configured to send the processed A-MPDU to the receiving end, so that the receiving end can obtain the multiple MPDUs by analyzing the processed A-MPDU. 16. The data processing device according to claim 15, wherein when the kth subframe is the last subframe or there is a k+1th subframe and is an empty subframe, the kth subframe's The second processing process includes: After the MPDU of the kth subframe located after the delimiter of the kth subframe, a padding bit with a length of Q is added, so that the MPDU of the k-1th subframe is moved to the MPDU of the kth subframe The sum of the length of the part before and after the delimiter of the kth subframe, the length Q of the padding bit, and the length of the MPDU of the kth subframe is equal to an integer multiple of x, where 0< Q≤x-1, Q is an integer. 17. The data processing device according to claim 15 or 16, wherein: When k≥2, the delimiter of the kth subframe includes first length indication information and second length indication information; Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe. 18. The data processing device according to claim 17, wherein: The delimiter of each subframe also includes a position identifier for indicating the position of each subframe, when the kth subframe is a non-empty subframe and the kth subframe is the last subframe, or the kth subframe is a non-empty subframe When there is an empty subframe and there is a k+1th subframe and the k+1th subframe is an empty subframe, the position identifiers in the delimiters of other subframes in the multiple subframes except the kth subframe are consistent with the The location identifiers in the kth subframe delimiter are different. 19. The data processing device according to claim 17 or 18, wherein: The delimiter of each subframe further includes a stuffing flag used to indicate whether there are stuffing bits in each subframe. 20. A data processing device, characterized in that, the data processing device is used for a receiving end, and the data processing device comprises: The receiving unit is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, and each of the The length of the data part of the subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second Length indication information, the data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer ; An analysis unit, configured to sequentially analyze and process the subframes in the plurality of subframes in units of length x to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤ y, k is an integer, and the parsing process for the kth subframe includes: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the k-1th subframe Obtaining the first part of the MPDU of the kth subframe in the data part, obtaining the second part of the MPDU of the kth subframe from the data part of the kth subframe, combining the first part with the The two parts are combined to form the MPDU of the kth subframe, at this time 2≤k≤y; Wherein, the first length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, and the second length indication information is used to indicate the length of the MPDU of the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate the length of the kth subframe The length of the part where the MPDU is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located at the delimiter of the kth subframe The sum of the lengths of the following parts, the second length indication information is used to indicate that the MPDU of the k+1th subframe is moved to after the MPDU of the kth subframe, and the location of the k+1th subframe The length of the part before the delimiter; or, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to after the MPDU of the k-1th subframe, and the location of the kth subframe The sum of the length of the part before the delimiter and the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe, the second length indication information is used to indicate that the kth subframe The MPDU of the frame is moved to the length of the part after the MPDU of the k-1th subframe and before the delimiter of the kth subframe; or, the first length indication information is used to indicate that the kth subframe The length of the part where the MPDU of the frame is moved to after the MPDU of the k-1th subframe and before the delimiter of the kth subframe is the same as the length of the part where the MPDU of the kth subframe is located in the kth subframe sum of the lengths of the part after the delimiter, and the second length indication information is used to indicate the length of the part of the MPDU of the kth subframe after the delimiter of the kth subframe. 21. A data processing device, characterized in that, the data processing device is used for a receiving end, and the data processing device comprises: The receiving unit is configured to receive the aggregated media access control protocol data unit A-MPDU sent by the sending end, the A-MPDU includes y subframes, each of which includes a delimiter and a data part, and each of the The length of the data part of the subframe is greater than or equal to zero, the length of the delimiter of each subframe is x, x≥1, x is an integer, and the delimiter includes the first length indication information and the second Length indication information, the data part includes a media access control protocol data unit MPDU, the length of the data part between the delimiters of each two subframes is an integer multiple of x, y≥2, and y is an integer ; An analysis unit, configured to sequentially analyze and process the subframes in the plurality of subframes in units of length x to obtain a plurality of MPDUs, wherein the kth subframe is any one of the y subframes, 1≤k≤ y, k are integers, and the parsing unit includes: The first parsing unit is configured to perform a first parsing process on the kth subframe: according to the first length indication information and the second length indication information in the delimiter of the kth subframe, from the kth subframe Obtain the first part of the MPDU of the kth subframe from the data part of the k+1th subframe, obtain the second part of the MPDU of the kth subframe from the data part of the k+1th subframe, and combine the first part and the The second part is combined to form the MPDU of the kth subframe, at this time 1≤k≤y-1; Wherein, the first length indication information is used to indicate that the MPDU of the kth subframe is moved to the part before the MPDU of the k+1th subframe and after the delimiter of the k+1th subframe The sum of the length and the length of the part of the MPDU of the kth subframe located before the delimiter of the k+1th subframe, the second length indication information is used to indicate that the MPDU of the k-1th subframe is moved The length of the part before the MPDU of the kth subframe and after the delimiter of the kth subframe. 22. The data processing device according to claim 21, wherein: The delimiter also includes a padding identifier, and the parsing unit also includes: a detection unit, configured to detect the filling identifier in the kth subframe; The first parsing unit is specifically configured to perform the first parsing process on the kth subframe when the detection unit detects that the filling bit does not exist in the kth subframe; The second parsing unit is configured to perform a second parsing process on the kth subframe when the detection unit detects that the stuffing flag indicates that the stuffing bits exist in the kth subframe: according to the kth subframe The first length indication information and the second length indication information in the delimiter of the k subframe, in the data part of the kth subframe, the distance from the delimiter of the kth subframe is e, And the part with a length of f is used as the MPDU of the kth subframe, e is the length indicated by the second length indication information in the delimiter of the kth subframe, and f is the length of the kth subframe The first length in the delimiter indicates the length indicated by the information. 23. A data processing system, characterized in that the data processing system comprises: a sending end and a receiving end, The sending end includes the data processing device according to any one of claims 12 to 19; The receiving end includes the data processing device according to any one of claims 20 to 22.