CN1921367B - Data frame retransmission method and system based on non-acknowledgment mechanism in multi-carrier DO system - Google Patents

Abstract

The present invention provides a data frame retransmission method and system based on a non-response mechanism in a multi-carrier DO system. The identification information of the correctly received data frame in the carrier link where the frame is located determines the identification information of the errored frame, and the wireless access terminal transmits the identification information of the errored frame and the identification information of the carrier link where the errored frame is located to On the network side, the network side determines the data frame that needs to be retransmitted according to the received identification information, and retransmits the data frame. The present invention greatly simplifies the processing process for the wireless access terminal to detect the wrong frame, simplifies the content of the message transmitted between the wireless access terminal and the network side, and reduces the length of the NAK control message; The purpose of improving the response speed of error frames, improving the efficiency of data frame retransmission, and improving the efficiency of effective data transmission in multi-carrier DO systems.

Description

Data frame retransmission method and system based on non-acknowledgment mechanism in multi-carrier DO system

technical field

The invention relates to the technical field of wireless network communication, in particular to a data frame retransmission method and system based on a non-response mechanism in a multi-carrier DO system.

Background technique

At present, 3G mobile communication technology is gradually mature and commercially available. 3GPP2 (Third Generation Mobile Communication Cooperation Project Organization 2) CDMA2000 1XEV-DO (Evolution, Evolution, Data Only, only supports packet data services) will further provide competitive services in the next few years. wireless access system.

1XEV-DO technology is a technology used to transmit high-speed packet data services. The maximum peak rate supported by each sector carrier frequency can reach 2.4Mbps. In version A, the peak rate can reach 3.1Mbps. However, in order to maintain competitiveness in the next decade or decades, it is necessary to introduce new wireless access technologies.

At present, the industry has reached a preliminary consensus on the evolution of 3GPP2 air interface technology, which is to divide the evolution of 3GPP2 air interface technology into two stages. The first stage is to adopt multi-carrier DO technology and upgrade the upper layer software without changing the physical layer as much as possible. , obtain a higher peak data rate, and ensure backward compatibility. The completion time of this standard is about the end of 2005; the second stage, the introduction of more advanced new technologies, is the long-term evolution plan of 3GPP2.

RLP (Radio Link Protocol) is a link layer protocol that guarantees best-effort transmission of packet data in the 1XEV-DO system. It can provide more reliable data transmission for the upper layer such as the TCP layer, thereby shielding the wireless side from burst Send error code interference.

RLP is a protocol that provides error detection and data frame retransmission based on NAK (Not Acknowledged). When the data receiving end detects that a data frame is lost during transmission, it may request the data sending end to retransmit the lost data frame through a NAK control message. The data sending end performs data retransmission according to the sequence number of the first byte of the lost data carried in the NAK control message and the length of the lost data.

In a multi-carrier DO system, multiple forward carrier channels may transmit data frames at the same time. Therefore, RLP needs to be modified to ensure the validity and reliability of data reception.

At present, a schematic diagram of an implementation method of data frame retransmission based on a single-RLP (single-RLP) instance is shown in FIG. 1 .

In Figure 1, the network side maintains a single RLP instance. The RLP instance packages the upper-layer packet data and assigns consecutive SAR_Seq sequence numbers to each RLP packet. Then, the RLP packets with continuous SAR_Seq sequence numbers are allocated to different carriers according to the scheduling algorithm. Each carrier link allocates continuous ARQ_Seq sequence numbers to the RLP packets transmitted on the link.

The wireless access terminal detects whether there is an error frame on the carrier link according to the continuity of the ARQ_Seq sequence number of each RLP packet, and the SAR_Seq sequence number of the RLP packet is used to reorder the RLP packets received on multiple carrier links , so as to be submitted to the upper layer for processing.

If the wireless access terminal detects that the ARQ_Seq sequence number on a carrier link is discontinuous, it means that an error frame occurs on the carrier link, and the wireless access terminal needs to request the network side to resend the RLP packet with the error frame through the NAK control message .

The current data frame retransmission method based on the non-acknowledgment mechanism will be described in detail through two specific examples below.

Example 1. The SAR_Seq sequence numbers and ARQ_Seq sequence numbers of the RLP packets received by the wireless access terminal from carrier link 1 and carrier link 2 respectively are as follows:

Carrier Link 1, namely Link1 Carrier Link 2, namely Link2

<ARQ_Seq, SAR_Seq> <ARQ_Seq, SAR_Seq>

<1, 5>--received correctly <1, 6>--received correctly

<2, 8>--Not yet received

<3, 9>--Received correctly <3, 10>--Not yet received

The ARQ_Seq sequence numbers of the RLP packets received by the wireless access terminal from carrier link 1 are 1 and 3 respectively, and the ARQ_Seq sequence numbers of the RLP packets received by the wireless access terminal from carrier link 2 are 1; since carrier link 1 The ARQ_Seq sequence numbers of the RLP packets are not continuous, so the wireless access terminal detects that an error frame is generated, and needs to request the network side to retransmit the RLP packet.

After the wireless access terminal determines that there is an RLP packet that needs to be retransmitted, it needs to further determine the SAR_Seq sequence number of the lost RLP packet. At present, the method for the wireless access terminal to determine the SAR_Seq sequence number of the lost RLP packet is:

The wireless access terminal determines that the SAR_Seq sequence numbers of the last RLP packets received from the two carrier links are 6 and 9 respectively, so the wireless access terminal determines that the SAR_Seq sequence numbers of the lost RLP packets are 7 and 8, although the SAR_Seq RLP packets with sequence number 8 may also be transmitted over the air.

After determining the SAR_Seq sequence number of the lost RLP packet, the wireless access terminal assembles a NAK control message and sends it to the network side. The information that needs to be included in the NAK control message is: SAR_Seq sequence numbers 7 and 8 of the lost RLP packet, The SAR_Seq sequence number 9 of the last RLP packet received by the inbound terminal on carrier link 1, and the SAR_Seq sequence number 6 of the last RLP packet received by the wireless access terminal on carrier link 2.

After receiving the NAK control message, the network side determines on which carrier link the lost RLP packet is sent according to the list maintained by itself. For example, it is determined that the RLP packet with the SAR_Seq sequence number 7 is sent on the carrier link 1. The RLP packet of 8 is sent on the carrier link 2, and the network side can determine the SAR_Seq sequence number according to the SAR_Seq sequence number 9 of the last RLP packet received by the wireless access terminal on the carrier link 1 provided in the NAK control message The RLP packet of 7 is a frame error and needs to be retransmitted; the network side can determine the SAR_Seq sequence number according to the SAR_Seq sequence number 6 of the last RLP packet received by the wireless access terminal on the carrier link 2 provided in the NAK control message The RLP packet of 8 has not been received yet, it is not a frame error, and does not need to be retransmitted.

After the network side determines the RLP packet that needs to be retransmitted, it retransmits the RLP packet with the SAR_Seq number 7 to the wireless access terminal, thereby solving the problem of stable forward data transmission based on RLP in the multi-carrier DO system.

Example 2. The SAR_Seq sequence number and ARQ_Seq sequence number of the RLP packet received by the wireless access terminal from carrier link 1 and carrier link 2 are as follows:

Carrier Link 1, namely Link1 Carrier Link 2, namely Link2

<ARQ_Seq, SAR_Seq> <ARQ_Seq, SAR_Seq>

<1, 5>--received correctly <1, 6>--received correctly

<2, 7>--Received correctly

<3, 8>--Received correctly

<2, 10>--received correctly

<5, 11>--Received correctly <3, 12>--Not yet received

The ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 1 are 1, 2, 3, and 5 respectively, and the ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 2 are 1 and 2 , 3. Since the ARQ_Seq sequence numbers of the RLP packets in the carrier link 1 are discontinuous, the wireless access terminal detects that an error frame is generated, and needs to request the network side to retransmit the RLP packet.

After determining that there is an RLP packet that needs to be retransmitted, the wireless access terminal needs to further determine the SAR_Seq sequence number of the lost RLP packet. The wireless access terminal respectively determines that the SAR_Seq sequence numbers of the last RLP packets it receives from the two carrier links are 10 and 11 respectively, and the RLP packet with the SAR_Seq sequence number 8 has been received correctly, so the wireless access terminal determines that it is lost The SAR_Seq number 9 of the RLP packet.

After determining the SAR_Seq sequence number of the lost RLP packet, the wireless access terminal assembles a NAK control message and sends it to the network side. The information that needs to be included in the NAK control message is: the SAR_Seq sequence number 9 of the lost RLP packet, and the wireless access terminal The SAR_Seq sequence number of the last RLP packet received on carrier link 1 is 11, and the SAR_Seq sequence number of the last RLP packet received by the wireless access terminal on carrier link 2 is 10.

After receiving the NAK control message, the network side determines which carrier link the lost RLP packet was sent on according to the list maintained by itself. For example, it is determined that the RLP packet with the SAR_Seq sequence number of 9 is sent According to the SAR_Seq number 11 of the last RLP packet received by the wireless access terminal on the carrier link 1 provided in the NAK control message, it can be determined that the RLP packet with the SAR_Seq number 9 is a frame error and needs to be retransmitted.

After the network side determines the RLP packet that needs to be retransmitted, it retransmits the RLP packet with the SAR_Seq number 9 to the wireless access terminal, thereby solving the problem of stable forward data transmission based on RLP in the multi-carrier DO system.

It can be seen from the above description that in the existing data frame retransmission method based on the non-acknowledgment mechanism, the terminal device needs to determine the errored frame according to the RLP packets it receives from multiple carrier links. In many cases, the complexity of judging the lost data frame by the wireless access terminal is greatly increased, so that the wireless access terminal cannot respond quickly to the lost data frame. Moreover, the NAK control message assembled by the wireless access terminal carries the SAR_Seq sequence number of the RLP packet it received last from each carrier link, so that the length of the NAK control message is proportional to the number of carrier links. In practical applications, The SAR_Seq sequence number is generally 22 bits. When the number of carrier links increases, the length of the NAK control message is greatly increased, thereby reducing the transmission efficiency of effective data and reducing the data throughput.

Contents of the invention

The purpose of the present invention is to provide a data frame retransmission method based on a non-acknowledgment mechanism in a multi-carrier DO system, which simplifies the processing process for wireless access terminals to detect errored frames, and simplifies the communication between wireless access terminals and the network side. The content of the transmitted message realizes the purpose of improving the response speed of the wireless access terminal to the errored frame, improving the retransmission efficiency of the data frame, and improving the effective data transmission efficiency in the multi-carrier DO system.

In order to achieve the above object, a data frame retransmission method based on a non-acknowledgment mechanism in a multi-carrier DO system provided by the present invention includes:

a. When the wireless access terminal detects that the sequence numbers of the data frames allocated continuously by the carrier link of the received data frame are discontinuous in the carrier link, it determines that an errored frame based on the non-acknowledgment mechanism occurs;

b. The wireless access terminal determines the identification information of the errored frame according to the identification information of the data frame that has been correctly received in the carrier link where the errored frame is located; the identification information of the data frame is: the network side is the wireless access terminal Consecutive data frame numbers assigned to all data frames transmitted on each carrier link;

c. The wireless access terminal transmits the identification information of the errored frame and the identification information of the carrier link where the errored frame is located to the network side;

d. The network side determines the data frames that need to be retransmitted according to the stored data frame transmission list and the received identification information, and retransmits the data frames.

Described step b specifically comprises:

The wireless access terminal determines the data frame sequence number information of the errored frame according to the data frame sequence numbers of two data frames adjacent to the errored frame that it has correctly received from the carrier link where the errored frame is located.

The data frame sequence number information of the errored frame is: the range of the data frame sequence number.

Described step c specifically comprises:

The wireless access terminal assembles a non-response control message according to the sequence number range of the data frame of the errored frame and the identification information of the carrier link where the errored frame is located, and transmits it to the network side, requesting the network side to retransmit the errored frame.

Described step d specifically comprises:

The network side determines the carrier link identification information in the entry matching the received error frame identification information according to the data frame sending list, and judges the carrier link identification information in the matching entry and the received carrier link identification information. Whether the identification information is the same;

If the same, determine the errored frame as a data frame that needs to be retransmitted, and retransmit the data frame;

If not, it is determined that the errored frame does not require data retransmission.

The non-response mechanism is: a non-response mechanism based on a default packet application, or a non-response mechanism based on a default multi-stream packet, or a non-acknowledge mechanism based on an enhanced multi-stream packet.

The identification information of the data frame includes: a SAR_Seq sequence number, and the sequence numbers of the data frames allocated continuously by the carrier link in the carrier link include: an ARQ_Seq sequence number.

The present invention also provides a data frame retransmission system based on a non-response mechanism in a multi-carrier DO system, including:

Retransmission requesting end: detect the serial number of the data frame in the carrier link allocated continuously by the carrier link of the data frame received by the wireless access terminal, and when it is determined that the serial number of the data frame in the carrier link is discontinuous, determine that the Based on the errored frame of the non-acknowledgment mechanism, the identification information of the errored frame is determined according to the identification information of the correctly received data frame in the carrier link where the errored frame is located, and the identification information of the errored frame and the errored frame are combined The identification information of the carrier link where it is located is transmitted to the data frame retransmission end; the identification information of the data frame is: the continuous data allocated by the network side for all data frames transmitted on each carrier link of the wireless access terminal frame number;

Data frame retransmission end: Determine the data frame that needs to be retransmitted according to the stored data frame transmission list and received identification information, and retransmit it to the retransmission request end.

The retransmission request end includes: a module for detecting an errored frame, a module for determining identification information, and a module for assembling a NAK message; and the data frame retransmission end includes: a module for determining a retransmission data frame and a retransmission module;

Errored frame detection module: detect the sequence number of the data frame in the carrier link allocated continuously by the carrier link of the data frame received by the wireless access terminal, and determine that the sequence number of the data frame in the carrier link is discontinuous An errored frame based on the non-response mechanism occurs, and the identification information module is notified;

Determine the identification information module: determine the identification information of the carrier link where the errored frame is located according to the notification, and according to the information that the wireless access terminal has correctly received from the carrier link where the errored frame is located, before and after the errored frame The data frame sequence numbers of two adjacent data frames determine the range of data frame sequence numbers by error frames, and transmit the identification information of the carrier link and the range of data frame sequence numbers by error frames to the assembled NAK message module;

Assembling the NAK message module: assembling the NAK control message according to the identification information of the received carrier link and the sequence number range of the data frame being erroneously framed, and transmitting it to the module for determining the retransmission data frame;

Determine the retransmission data frame module: determine the carrier link identification information in the entry matching the data frame sequence number of the error frame it receives according to the data frame sending list stored therein, and the carrier link identification information in the matching entry When the information is the same as the received carrier link identification information, the erroneous frame is determined as a data frame requiring data retransmission, and the data frame sequence number of the erroneous frame is transmitted to the retransmission module;

Retransmission module: transmits the corresponding data frame to the wireless access terminal according to the serial number of the data frame it receives.

From the description of the above technical solution, it can be seen that when the wireless access terminal of the present invention determines that an errored frame occurs, it does not need to judge the reception of data frames of other carrier links, and directly receives the received data frame from the carrier link where the errored frame is located. Correctly received data frames can determine the identification information of the errored frame, which greatly simplifies the process of detecting the errored frame by the wireless access terminal; by combining the identification information of the carrier link where the errored frame is located and the data of the errored frame The frame number range information is transmitted to the network side, and the network side performs table entry matching on the data frame number range information of the errored frame received by it, and judges the identification information of the carrier link it receives and the carrier link in the matching table entry. Whether the identification information of the network side is the same to determine the data frame that needs to be retransmitted, without increasing the complexity of the process of judging the retransmission data frame on the network side, greatly simplifies the content of the message transmitted between the wireless access terminal and the network side, making NAK The length of the control message is effectively reduced, and the length of the NAK control message has nothing to do with the number of carrier links; thus, through the technical solution provided by the present invention, the response speed of the wireless access terminal to the errored frame is improved, and the data frame repetition rate is improved. The purpose of improving the transmission efficiency and improving the effective data transmission efficiency in the multi-carrier DO system.

Description of drawings

Fig. 1 is the implementation schematic diagram of the data frame retransmission based on the non-acknowledgment mechanism in the prior art;

FIG. 2 is a schematic diagram of a data frame retransmission system based on a non-acknowledgment mechanism in the multi-carrier DO system of the present invention.

Detailed ways

The cores of the method and system of the present invention are both: the wireless access terminal determines that an errored frame based on a non-response mechanism occurs, and the wireless access terminal determines according to the identification information of the data frame that has been correctly received in the carrier link where the errored frame is located. The identification information of the erroneous frame, the wireless access terminal transmits the identification information of the erroneous frame and the identification information of the carrier link where the erroneous frame is located to the network side, and the network side determines the need for data replay according to the received identification information The transmitted data frame and retransmit the data frame.

The technical solution provided by the present invention will be further described below based on the core idea of the present invention.

When the data frame based on the non-response mechanism is transmitted from the network side to the wireless access terminal, it will carry two identification information, one is the continuity and sequence allocated by the network side for all data frames that need to be transmitted to the wireless access terminal serial number, such as the SAR_Seq serial number; the other is the continuous and sequential serial number assigned by each carrier link to the data frames sent by it, such as the ARQ_Seq serial number; The sequence number assigned to the data frame of the wireless access terminal is called the data frame sequence number, and the sequence number allocated to the data frame sent by each carrier link is called the sequence number of the data frame in the carrier link.

The wireless access terminal receives the data frame transmitted from the network side from each carrier link, and determines whether an errored frame based on the non-acknowledgment mechanism occurs according to the serial number of the data frame in the carrier link, that is, the wireless access terminal determines whether it is from When the sequence numbers of data frames received in a certain carrier link are discontinuous in the carrier link, the wireless access terminal determines that an errored frame occurs in the carrier link.

After determining that an errored frame occurs in a carrier link, the wireless access terminal should determine the sequence number of the data frame of the errored frame. In the present invention, the specific method for the wireless access terminal to determine the sequence number of the data frame of the errored frame is: the wireless access terminal determines the sequence numbers of the data frames adjacent to the errored frame, and the wireless access terminal compares the two data frames The vacant data frame serial number between the serial numbers is determined as the data frame serial number of the errored frame, and the vacant data frame serial number can be expressed in the form from XX to YY, such as the data frame of the correctly received data frame adjacent to the errored frame The serial numbers are 7 and 9 respectively, and the serial number of the vacant data frame is 8. In this way, the serial number of the data frame of the wrong frame is 8, which can be expressed as only 8, or from 8 to 8; another example is before and after the wrong frame The data frame serial numbers of the adjacent correctly received data frames are 7 and 10 respectively, and the vacant data frame serial numbers are 8 and 9. In this way, the data frame serial numbers of the errored frames are 8 and 9, which can be expressed as 8 to 9.

It can be seen from the above description that in the present invention, when the wireless access terminal determines the sequence number of the data frame of the errored frame, it does not need to refer to the sequence numbers of the data frames received by the wireless access terminal from other carrier links. Only according to the data frame sequence number of the data frame correctly received from the carrier link where the errored frame is located, the data frame sequence number of the errored frame can be determined conveniently, which simplifies the processing process of the wireless access terminal for the errored frame, The response speed of the wireless access terminal to the errored frame is improved.

After the wireless access terminal determines the sequence number range of the errored frame, it needs to transmit the sequence number range of the data frame and the identification information of the carrier link where the errored frame is located to the network side, and the wireless access terminal can send the errored frame The sequence number of the data frame and the identification information of the carrier link where the errored frame is located are carried in the NAK control message and transmitted to the network side. Continuing from the previous example, if the sequence number of the errored frame is in the range of 8 to 8, and the carrier link where the errored frame is located If the carrier link identifier is 1, then 8 to 8 and 1 are carried in the NAK control message, and the data frame sequence numbers of data frames in other carrier links do not appear in the NAK control message, and the length of the LNAK control message is the same as the number of carrier links Regardless, the length of the NAK control message depends on the length of the data frame sequence number and the length of the carrier link identifier. In practical applications, the length of the data frame sequence number is 22 bits, and the length of the carrier link identifier is 4 bits, regardless of the number of carrier links. , the data frame identification information and the carrier link identification in the NAK control message always occupy 48 bits.

It can be seen from the above description that when the wireless access terminal transmits the NAK control message to the network side, it does not need to carry the data frame sequence number of the last data frame received from each carrier link in the NAK control message, simplifying The NAK control message is shortened, the length of the NAK control message is shortened, and the effective data transmission efficiency in the multi-carrier DO system is improved.

The network side obtains the sequence number range of the errored frame and the identification of the carrier link where the errored frame is located from the NAK control message it receives, and compares each data frame sequence number within the sequence number range of the errored frame with the network side Record and store the sent list of data frames for matching to obtain matching entries. The network side judges whether the carrier link identifier in the matching entry is the same as the carrier link identifier in the NAK control message, and if it is determined that the two are the same, then it is determined that the erroneous frame is a data frame that needs to be retransmitted. That is, the erroneous frame is a real erroneous frame. If it is determined that the two are different, it is determined that the erroneous frame is transmitted through other carrier links, and the erroneous frame does not need to be retransmitted. Frames are not really errored.

It can be seen from the above description that after the present invention improves the method for the wireless access terminal to determine the serial number of the data frame that has been erroneously framed and the information carried in the NAK control message, the method for judging the data frame that needs to be retransmitted by the network side does not Big change, and more importantly, the present invention does not increase the complexity of the method for judging the data frame that needs to be retransmitted by the network side, so that the method of the present invention has good applicability.

The non-response mechanism in the present invention is: a non-response mechanism based on default grouping application, or a non-response mechanism based on default multi-stream grouping, or a non-response mechanism based on enhanced multi-stream grouping.

The method of the present invention will be described below by taking two specific applications of the non-response mechanism based on single RLP in the background art as examples.

Example 3. The SAR_Seq sequence numbers and ARQ_Seq sequence numbers of the RLP packets received by the wireless access terminal from carrier link 1 and carrier link 2 are as follows:

Carrier Link 1, namely Link1 Carrier Link 2, namely Link2

<ARQ_Seq, SAR_Seq> <ARQ_Seq, SAR_Seq>

<1, 5>--received correctly <1, 6>--received correctly

<2, 8>--Not yet received

<3, 9>--Received correctly <3, 10>--Not yet received

The ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 1 are 1 and 3 respectively, and the ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 2 are 1, 2, and 3; because The ARQ_Seq sequence numbers of the RLP packets in the carrier link 1 are discontinuous, so the wireless access terminal detects that an error frame is generated, and needs to request the network side to retransmit the RLP packet.

After determining that there is an RLP packet that needs to be retransmitted, the wireless access terminal needs to further determine the SAR_Seq sequence number range of the lost RLP packet. The wireless access terminal determines that the SAR_Seq sequence numbers of the two RLP packets adjacent to the lost RLP packet received correctly from carrier link 1 are 5 and 9 respectively, so the wireless access terminal directly determines the SAR_Seq of the lost RLP packet SAR_Seq sequence numbers range from 6 to 8.

After the wireless access terminal determines the SAR_Seq sequence number range of the lost RLP packet, it assembles a NAK control message and sends it to the network side. The information that needs to be included in the NAK control message is: the SAR_Seq sequence number range of the lost RLP packet, from 6 to 8. Identification information of carrier link 1.

After receiving the NAK control message, the network side determines the items in the RLP packet transmission list stored in its records that match the SAR_Seq sequence numbers 6, 7, and 8. Since the RLP packets with SAR_Seq sequence numbers 6 and 8 are sent through the carrier link 2 Therefore, the carrier link identifiers in the entries matching the SAR_Seq sequence numbers 6 and 8 should be the identifiers of the carrier link 2, so that the carrier link 1 identifier in the NAK control message matches the SAR_Seq sequence numbers 6 and 8 The carrier link identifiers in the table entries are different, and the network side determines that the RLP packets with SAR_Seq sequence numbers 6 and 8 do not need to perform data retransmission. Similarly, since the RLP packet whose SAR_Seq sequence number is 7 is sent through the carrier link 1, the carrier link identifier in the entry matching the SAR_Seq sequence number 7 should be the identifier of the carrier link 1. In this way, the NAK control message The identifier of the carrier link 1 is the same as the carrier link identifier in the entry matching the SAR_Seq number 7, and the network side determines that the RLP packet with the SAR_Seq number 7 is a frame error, and data retransmission is required.

After the network side determines the RLP packet that needs to be retransmitted, it retransmits the RLP packet with the SAR_Seq number 7 to the wireless access terminal, thereby solving the problem of stable forward data transmission based on RLP in the multi-carrier DO system.

It can be seen from example 3 that in the present invention, the wireless access terminal does not need to refer to the SAR_Seq sequence number of the RLP packet it receives from carrier link 2, only according to the SAR_Seq sequence number of the RLP packet it correctly receives from carrier link 1. The SAR_Seq sequence number range of the errored frame can be determined quickly and conveniently, which simplifies the processing process of the errored frame by the wireless access terminal. The information contained in the NAK control message in Example 1 of the prior art is: the SAR_Seq of the lost RLP packet Sequence number 7, SAR_Seq sequence number 9 of the last RLP packet received by the wireless access terminal on carrier link 1, SAR_Seq sequence number 6 of the last RLP packet received by the wireless access terminal on carrier link 2; and the present invention The information contained in the NAK control message is: the SAR_Seq sequence number of the lost RLP packet ranges from 6 to 8, and the identification information of carrier link 1; since the carrier link identification information generally occupies 4 bits, and the SAR_Seq sequence number generally occupies 22 bits, so the existing The length of the NAK message of technical example 1 is at least 66bit, and along with the growth of carrier link quantity, the length of NAK message also can increase with the multiple of 22bit, and the length of NAK control message among the present invention is at least 48bit, and message The length is independent of the number of carrier links, which simplifies NAK control messages and improves the transmission efficiency of valid data in multi-carrier DO systems.

Example 4. The SAR_Seq sequence number and ARQ_Seq sequence number of the RLP packet received by the wireless access terminal from carrier link 1 and carrier link 2 are as follows:

Carrier Link 1, namely Link1 Carrier Link 2, namely Link2

<ARQ_Seq, SAR_Seq> <ARQ_Seq, SAR_Seq>

<1, 5>--received correctly <1, 6>--received correctly

<2, 7>--Received correctly

<3, 8>--Received correctly

<2, 10>--received correctly

<5, 11>--Received correctly <3, 12>--Not yet received

The ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 1 are 1, 2, 3, and 5 respectively, and the ARQ_Seq numbers of the RLP packets received by the wireless access terminal from carrier link 2 are 1 and 2 , 3. Since the ARQ_Seq sequence numbers of the RLP packets in the carrier link 1 are discontinuous, the wireless access terminal detects that an error frame is generated, and needs to request the network side to retransmit the RLP packet.

After determining that there is an RLP packet that needs to be retransmitted, the wireless access terminal needs to further determine the SAR_Seq sequence number range of the lost RLP packet. The wireless access terminal determines that the SAR_Seq sequence numbers of the two RLP packets adjacent to the lost RLP packet that it correctly receives from carrier link 1 are 8 and 11 respectively, so the wireless access terminal directly determines the sequence number of the lost RLP packet SAR_Seq sequence numbers range from 9 to 10.

After the wireless access terminal determines the SAR_Seq sequence number range of the lost RLP packet, it assembles a NAK control message and sends it to the network side. The information that needs to be included in the NAK control message is: the SAR_Seq sequence number range of the lost RLP packet, from 9 to 10. Identification information of carrier link 1.

After receiving the NAK control message, the network side determines the items in the RLP packet transmission list stored in its own records that match the SAR_Seq sequence numbers 9 and 10. Since the RLP packet with the SAR_Seq sequence number 10 is sent through the carrier link 2, The carrier link identifier in the entry matching the SAR_Seq sequence number 10 should be the identifier of the carrier link 2, so that the carrier link 1 identifier in the NAK control message matches the carrier link identifier in the entry matching the SAR_Seq sequence number 10 It is different, the network side determines that the RLP packet with the SAR_Seq sequence number 10 does not need to perform data retransmission. Similarly, since the RLP packet whose SAR_Seq sequence number is 9 is sent through the carrier link 1, the carrier link identifier in the entry matching the SAR_Seq sequence number 9 should be the identifier of the carrier link 1. In this way, the NAK control message The identifier of the carrier link 1 is the same as the carrier link identifier in the entry matching the SAR_Seq number 9, and the network side determines that the RLP packet with the SAR_Seq number 9 is a frame error, and data retransmission is required.

After the network side determines the RLP packet that needs to be retransmitted, it retransmits the RLP packet with the SAR_Seq number 9 to the wireless access terminal, thereby solving the problem of stable forward data transmission based on RLP in the multi-carrier DO system.

It can be seen from Example 4 that the wireless access terminal in the present invention does not need to refer to the SAR_Seq sequence number of the RLP packet it receives from carrier link 2, only according to the SAR_Seq sequence number of the RLP packet it correctly receives from carrier link 1. The SAR_Seq sequence number range of the errored frame can be determined quickly and conveniently, which simplifies the processing of the errored frame by the wireless access terminal. The information contained in the NAK control message in the example 2 of the prior art is: the SAR_Seq of the lost RLP packet Sequence number 9, SAR_Seq sequence number 11 of the last RLP packet received by the wireless access terminal on carrier link 1, SAR_Seq sequence number 10 of the last RLP packet received by the wireless access terminal on carrier link 2; and the present invention The information contained in the NAK control message is: the SAR_Seq sequence number of the lost RLP packet ranges from 9 to 10, and the identification information of the carrier link 1; since the carrier link identification information generally occupies 4 bits, the SAR_Seq sequence number generally occupies 22 bits, so the existing The length of the NAK message of technical example 2 is at least 66bit, and along with the growth of carrier link quantity, the length of NAK message also can increase with the multiple of 22bit, and the length of NAK control message among the present invention is at least 48bit, and message The length is independent of the number of carrier links, which simplifies NAK control messages and improves the transmission efficiency of valid data in multi-carrier DO systems.

The data frame retransmission system based on the non-acknowledgment mechanism in the multi-carrier DO system provided by the present invention is shown in FIG. 2 .

In Fig. 2, the system of the present invention mainly includes: a retransmission request end and a data frame retransmission end. The retransmission requesting end is: the wireless access terminal, and the data frame retransmission end is located at the network side.

The retransmission requester is mainly used to determine the identification information of the errored frame according to the identification information of the correctly received data frame in the carrier link where the errored frame is located when it is determined that an errored frame based on the non-response mechanism occurs, and will be The identification information of the errored frame and the identification information of the carrier link where the errored frame is located are transmitted to the data frame retransmission end.

The data frame retransmission end is mainly used to determine the data frame that needs to be retransmitted according to the received identification information, and retransmits it to the retransmission request end.

The main functions of the retransmission requesting end are realized by the module of detecting the errored frame, determining the identification information module, and assembling the NAK message module. The main function of the data frame retransmission terminal is realized by the module for determining the retransmission data frame and the retransmission module.

The module for detecting errored frames is mainly used to detect the serial numbers of the data frames continuously assigned by the carrier links in the carrier links of the data frames received by the wireless access terminal from each carrier link, and determine the data frame number in a certain carrier link When the sequence numbers of the frames in the carrier link are discontinuous, it is determined that an errored frame based on the non-response mechanism occurs, and the identification information module is notified, such as the ARQ_Seq sequence numbers of the RLP packets received by the wireless access terminal from the carrier link 1 respectively When it is 1, 2, 3, or 5, it is determined that a lost RLP packet occurs.

The module for determining the identification information is mainly used to determine the identification information of the carrier link where the errored frame is located according to the notification of the module for detecting the errored frame, and according to the information correctly received by the wireless access terminal from the carrier link where the errored frame is located, and the received The data frame numbers of the two adjacent data frames before and after the error frame determine the range of the data frame number of the error frame, such as two RLP packets adjacent to the lost RLP packet received by the wireless access terminal from carrier link 1 The SAR_Seq sequence numbers of the RLP packets are 8 and 11 respectively, then the identification information module determines that the SAR_Seq sequence numbers of the lost RLP packets range from 9 to 10. After determining the sequence number range of the errored frame data frame, the identification information module transmits the identification information of the carrier link and the sequence number range of the errored frame data frame to the assembly NAK message module.

The assembly NAK message module is mainly used to assemble the NAK control message according to the identification information of the carrier link it receives and the sequence number range of the framed data frame, and transmit it to the module for determining the retransmission data frame; for example, the SAR_Seq sequence number is from 9 to The identification information of 10 and carrier link 1 is carried in the NAK control message and transmitted to the module for determining the retransmission data frame.

The module of determining the retransmission data frame is mainly used to determine the carrier link identification information in the matching entry of each data frame sequence number within the range of the sequence number of the errored frame received by it according to the data frame transmission list stored in it, and When the carrier link identification information in the entry is the same as the received carrier link identification information, determine the errored frame as a data frame that needs to be retransmitted, and transmit the data frame sequence number of the errored frame to the retransmission module. For example, if the carrier link corresponding to the RLP packet with the SAR_Seq sequence number 10 in the data frame transmission list is set as carrier link 2, and the carrier link corresponding to the RLP packet with the SAR_Seq sequence number 9 in the data frame transmission list is carrier link 1, Since the information in the NAK control message is: the identification of the carrier link 1, the SAR_Seq sequence numbers 9 and 10, it can be determined that the RLP packet with the SAR_Seq sequence number 9 is framed incorrectly, and data retransmission is required, and the module for determining the retransmission data frame will SAR_Seq number 9 is transmitted to the retransmission module.

The retransmission module is mainly used to retransmit the corresponding data frame to the wireless access terminal according to the sequence number of the received data frame such as SAR_Seq sequence number 9.

Although the present invention has been described by way of example, those of ordinary skill in the art know that there are many variations and changes in the present invention without departing from the spirit of the invention, and the claims of the application document of the present invention include these variations and changes.

Claims (9)

1. In the multi-carrier DO system based on the data frame retransmission method of no-answer mechanism, it is characterized in that, comprising:

   The quilt mistake frame of appearance based on no-answer mechanism determined in a, wireless access terminal when the sequence number of Frame in carrier link of the carrier link continuous dispensing of the Frame that detects reception is discontinuous;

   B, wireless access terminal are determined by the identification information of mistake frame according to this identification information by the Frame that correctly receives in the carrier link of mistake frame place; The identification information of described Frame is: network side be all Frames of transmitting on each carrier link of wireless access terminal distribute have a successional Frame sequence number;

   C, wireless access terminal transfer to network side with described by the identification information of mistake frame with by the identification information of the carrier link at mistake frame place;

   D, network side determine that according to the Frame transmission tabulation of its storage and the identification information that receives needs carry out the Frame of data re-transmission, and the line data frame of going forward side by side retransmits.
2. 2. based on the data frame retransmission method of no-answer mechanism, it is characterized in that in a kind of multi-carrier DO system as claimed in claim 1 that described step b specifically comprises:

   That the wireless access terminal correctly receives from the carrier link at quilt mistake frame place according to it, definite by the Frame serial number information of mistake frame with described Frame sequence number by two adjacent Frames of mistake frame.
3. 3. based on the data frame retransmission method of no-answer mechanism, it is characterized in that in a kind of multi-carrier DO system as claimed in claim 2 that described Frame serial number information by the mistake frame is: the Frame serial number range.
4. 4. based on the data frame retransmission method of no-answer mechanism, it is characterized in that in a kind of multi-carrier DO system as claimed in claim 3 that described step c specifically comprises:

   The wireless access terminal is assembled the non-control messages of replying according to described by the Frame serial number range of mistake frame with by the identification information of the carrier link at mistake frame place, and transmits it to network side, and the request network side retransmits by the mistake frame.
5. 5. based on the data frame retransmission method of no-answer mechanism, it is characterized in that in a kind of multi-carrier DO system as claimed in claim 1 that described steps d specifically comprises:

   Network side according to Frame send tabulation determine with its reception by the carrier link identification information in the list item of the identification information coupling of mistake frame, and judge whether the carrier link identification information in the described coupling list item identical with the carrier link identification information that it receives;

   If identical, this is missed the Frame that frame is defined as carrying out data re-transmission, the line data frame of going forward side by side retransmits;

   If inequality, determine that this is not needed to carry out data re-transmission by the mistake frame.
6. As in the described a kind of multi-carrier DO system of arbitrary claim in the claim 1 to 5 based on the data frame retransmission method of no-answer mechanism, it is characterized in that described no-answer mechanism is: based on the no-answer mechanism of default grouping application or based on the no-answer mechanism of default multithread grouping or based on the no-answer mechanism that strengthens the multithread grouping.
7. As in the described a kind of multi-carrier DO system of arbitrary claim in the claim 1 to 5 based on the data frame retransmission method of no-answer mechanism, it is characterized in that, the identification information of described Frame comprises: the SAR_Seq sequence number, and the sequence number of the Frame of described carrier link continuous dispensing in carrier link comprises: the ARQ_Seq sequence number.
8. In the multi-carrier DO system based on the Frame retransmission system of no-answer mechanism, it is characterized in that, comprising:

   Repeat requests end: the sequence number of Frame in carrier link of the carrier link continuous dispensing of the Frame that the detection wireless access terminal receives, when the definite sequence number of described Frame in carrier link is discontinuous, determine the quilt mistake frame of appearance based on no-answer mechanism, determine by the identification information of mistake frame according to this identification information by the Frame that correctly receives in the carrier link of mistake frame place, and with described by the identification information of mistake frame with transferred to Frame by the identification information of the carrier link at mistake frame place and retransmit and hold; The identification information of described Frame is: network side be all Frames of transmitting on each carrier link of wireless access terminal distribute have a successional Frame sequence number;

   Frame retransmits end: determine that according to the Frame transmission tabulation of its storage and the identification information that receives needs carry out the Frame of data re-transmission, and it is retransmitted to the repeat requests end.
9. 9. based on the Frame retransmission system of no-answer mechanism, it is characterized in that in a kind of multi-carrier DO system as claimed in claim 8 that described repeat requests end comprises: detect by the mistake frame module, determine identification information module, assembling NAK message module; And described Frame retransmits end and comprises: determine data retransmission frame module and retransmission module;

   Detect by the mistake frame module: the sequence number of Frame in carrier link of the carrier link continuous dispensing of the Frame that the detection wireless access terminal receives, when the definite sequence number of described Frame in carrier link is discontinuous, determine the quilt mistake frame of appearance, and notice is determined the identification information module based on no-answer mechanism;

   Determine the identification information module: determine by the identification information of the carrier link at mistake frame place according to described notice, and according to the wireless access terminal from correctly received the carrier link at mistake frame place, determine by the Frame serial number range of mistake frame with described Frame sequence number by two adjacent before and after mistake frame Frames, and transfer to the identification information of described carrier link with by the Frame serial number range of mistake frame and to assemble the NAK message module;

   Assembling NAK message module:, and transmit it to and determine the data retransmission frame module according to the identification information of the carrier link of its reception with by the Frame serial number range assembling NAK control messages of mistake frame;

   Determine the data retransmission frame module: according to the Frame of its storage send tabulation determine with its reception by the carrier link identification information in the Frame sequence number coupling list item of mistake frame, and the carrier link identification information of the carrier link identification information in described coupling list item and its reception is when identical, this is defined as carrying out the Frame of data re-transmission by the mistake frame, and the Frame sequence number of will quilt missing frame transfers to retransmission module;

   Retransmission module: according to the Frame sequence number of its reception with corresponding data frame transfer to the wireless access terminal.