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WO2016106489A1 - Procédé, appareil et dispositif pour envoyer et recevoir une trame de transmission - Google Patents

Procédé, appareil et dispositif pour envoyer et recevoir une trame de transmission Download PDF

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Publication number
WO2016106489A1
WO2016106489A1 PCT/CN2014/095300 CN2014095300W WO2016106489A1 WO 2016106489 A1 WO2016106489 A1 WO 2016106489A1 CN 2014095300 W CN2014095300 W CN 2014095300W WO 2016106489 A1 WO2016106489 A1 WO 2016106489A1
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Prior art keywords
transmission frame
field
bandwidth
copy
transmission
Prior art date
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PCT/CN2014/095300
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English (en)
Chinese (zh)
Inventor
杜振国
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201480080267.4A priority Critical patent/CN106464709B/zh
Priority to PCT/CN2014/095300 priority patent/WO2016106489A1/fr
Publication of WO2016106489A1 publication Critical patent/WO2016106489A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a device and a device for transmitting and receiving a transmission frame.
  • an access point (English: Access Point, AP for short) is used to transmit a transmission frame between one or more stations (English: Station, abbreviated as STA)
  • STA stations
  • some STAs may not be accurate due to channels and other reasons.
  • the AP may not be able to accurately receive the transmission frame sent by the STA.
  • an AP needs to first transmit a trigger frame (Trigger frame) to multiple STAs to be scheduled to allocate uplink transmissions of these STAs. Or the downlink received resource, that is, the AP simultaneously schedules multiple STAs to transmit uplink or downlink on different subchannels.
  • the AP sends a Trigger frame, where the uplink and downlink resource scheduling information of the subsequent multiple STAs is included; the scheduled STA transmits or receives according to the content in the Trigger frame at the corresponding time and frequency band.
  • the Trigger frame can also schedule only UL-only, or only DL-only, or schedule uplink and downlink simultaneously.
  • MIMO multi-user multiple input multiple output
  • the receiving object of the Trigger frame is a plurality of users to be scheduled. If some of the users fail to receive the Trigger frame correctly, all subsequent scheduling for the user is invalid, and the corresponding resources are wasted. Therefore, it is particularly important to improve the reliability of the Trigger frame.
  • Trigger frame as an example to illustrate the problem of unreliable transmission between the AP and the STA.
  • the problem of unreliable transmission exists in the transmission of any type of frame. Therefore, it is necessary to improve the frame transmission between the access point and the station.
  • the reliability is only in the multicast scene like Trigger frame, the transmission reliability problem of the frame is particularly prominent.
  • the method for improving the reliability of frame transmission is to use a lower modulation coding scheme (English: Modulation and Coding Scheme, MCS for short), that is, a lower modulation rate and a channel coding rate.
  • MCS Modulation and Coding Scheme
  • the lowest MCS in 802.11ac is MCS0, that is, the code rate is 1/2
  • the modulation mode is Binary Phase Shift Keying (English: Binary Phase Shift Keying, BPSK).
  • BPSK Binary Phase Shift Keying
  • 802.11ah a more The low-order MCS repeats the result of the modulation coding of MCS0 to enhance reliability.
  • the essence of this lower-order MCS is to introduce more redundancy in exchange for the improvement of reliability, but it will lead to an increase in the amount of data to be transmitted, a longer transmission time, and a lower transmission efficiency.
  • a non-HT duplicate transmission method is proposed in 802.11n, as shown in Figure 1.
  • First construct a 20MHz transmission frame, then copy it on multiple 20MHz channels, and then send it out.
  • the purpose of non-HT duplicate is to reserve a wider channel. For example, when an 802.11ac device intends to transmit to another 802.11ac device using 80 MHz, four request-to-send (English: Request to Send, RTS) frames are transmitted in a non-HT duplicate manner on the 80 MHz channel.
  • RTS Request to Send
  • any other third-party device hears the RTS on its own basic channel (the basic channel of different cells may be different), it can know that the other party will use the channel at a later time, so it will not Actively go to the competition channel, so as not to cause interference to the other party's transmission.
  • non-HT duplicate does not have the ability to improve transmission reliability, because for a receiving user, when it receives a transmission frame on a 20MHz channel, it is impossible to know whether the frame is also It was copied on other channels and copied on which channels. Therefore, even if the transmitting end actually copies the frame over multiple 20 MHz, the receiving end cannot use these copies for merging to improve reliability.
  • the embodiment of the invention provides a method and a device and a device for transmitting and receiving a transmission frame, so as to improve the reliability of frame transmission between the transmitting end and the receiving end.
  • a method for transmitting a transmission frame including:
  • the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap of a transmission subchannel used for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly form a transmission of the transmission The transmission channel of the frame.
  • the at least one field after the first signaling field of the transmission frame includes: the first part of the transmission frame All fields after a signaling field, or, a data field, or a second signaling field, or a data field and a second signaling field.
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • a method for receiving a transmission frame including:
  • each of the at least one copy One copy corresponds to a specific bandwidth in the transport channel
  • the received at least one copy is decoded.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is used to transmit the transmission a bitmap of a transmission subchannel of the input frame, all of the transmission subchannels indicated by the bitmap together constitute a transmission channel for transmitting the transmission frame, and the transmission channel indicated by the bandwidth information according to the copy indication information Receiving at least one copy of at least one field subsequent to the first signaling field of the copied transmission frame, including:
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • a field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
  • a third aspect provides a transmitting apparatus for transmitting a frame, including:
  • a generating unit configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
  • a copying unit configured to perform frequency domain copying at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information Indicated transmission channel frequency bandwidth;
  • a sending unit configured to send the copied transmission on a transport channel indicated by the bandwidth information Incoming frames.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap of a transmission subchannel for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame.
  • the at least one field after the first signaling field of the transmission frame includes: the first information of the transmission frame Let all fields after the field, or, the data field, or the second signaling field, or the data field and the second signaling field.
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • a fourth aspect provides a receiving device for transmitting a frame, including:
  • a detecting unit configured to detect, in a first signaling field of the transmission frame, a copy indication signal of the transmission frame Information and bandwidth information;
  • a receiving unit configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
  • a first decoding unit configured to decode the received at least one copy.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap form a transmission of the transmission frame Transmission channel, the receiving device is specifically used to:
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • the at least after the first signaling field of the transmission frame A field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
  • the first decoding unit includes:
  • a merging unit configured to merge the received at least one copy
  • a second decoding unit configured to decode the combined transmission frame.
  • a fifth aspect provides a transmitting device for transmitting a frame, including: a processor and a transmitter;
  • the processor is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
  • the processor is further configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth.
  • the transmitter is configured to send the copied transmission frame on a transmission channel indicated by the bandwidth information.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate at least one after the first signaling field of the transmission frame.
  • the frequency domain bandwidth unit when the fields are used for frequency domain replication.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap of a transmission subchannel used for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly form a transmission of the transmission The transmission channel of the frame.
  • the at least one field after the first signaling field of the transmission frame includes: the first information of the transmission frame Let all fields after the field, or, the data field, or the second signaling field, or the data field and the second signaling field.
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • a sixth aspect provides a receiving device for transmitting a frame, including: a processor and a receiver;
  • the processor is configured to detect, in a first signaling field of a transmission frame, replication indication information and bandwidth information of the transmission frame;
  • the receiver is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
  • the processor is further configured to decode the received at least one copy.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether at least one after the first signaling field of the transmission frame Fields are used for frequency domain replication.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identification information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap form a transmission of the transmission frame Transport channel, the receiver is specifically used to:
  • the copy indication information includes a frequency domain for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame At least two bits of information in a unit of bandwidth.
  • the at least after the first signaling field of the transmission frame A field includes: all fields following the first signaling field of the transmission frame, or a data field, or a second signaling field, or a data field and a second signaling field.
  • the step of the processor performing the decoding of the received at least one copy including:
  • the transmitting end carries the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be sent, according to the copy indication information.
  • At least one field after the first signaling field of the transmission frame is frequency-domain-copied in units of a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the transmission channel indicated by the bandwidth information.
  • the transmission frame after the transmission is sent, so that the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
  • FIG. 1 is a schematic diagram of a transmission mode of a transmission frame in the prior art
  • FIG. 2 is a schematic flowchart of a method for transmitting a transmission frame according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of replication of a transmission frame
  • FIG. 5 is a schematic diagram of modulation coding of an MCS32 in the prior art
  • Figure 6 is a schematic diagram of replication of another transmission frame
  • Figure 7 is a schematic diagram of replication of another transmission frame
  • Figure 8 is a schematic diagram of replication of another transmission frame
  • Figure 9 is a schematic diagram of replication of another transmission frame
  • FIG. 10 is a schematic flowchart diagram of a method for receiving a transmission frame according to an embodiment of the present disclosure
  • FIG. 11 is a schematic structural diagram of a device for transmitting a transmission frame according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a device for receiving a transmission frame according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a sending device for transmitting a frame according to an embodiment of the present disclosure
  • FIG. 14 is a schematic structural diagram of a receiving device for transmitting a frame according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for transmitting a transmission frame according to an embodiment of the present invention, where the method includes the following steps:
  • Step S101 Generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame.
  • the sending end may be an AP
  • the receiving end is one or more STAs
  • the sending end may also be a STA
  • the receiving end is an AP
  • the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
  • an AP advertises a specific 20 MHz basic channel to its associated users
  • the receiving end generally listens to the basic channel.
  • the transmitting end generates a transmission frame to be transmitted, and the transmission frame includes a first signaling field, and of course, a data field and the like.
  • the transmitting end writes the copy indication information and the bandwidth information in the first signaling field, where the copy indication information may include a copy indication, configured to indicate whether to transmit one or more fields after the first signaling field of the transmission frame Domain replication; this bandwidth information indicates the transmission channel frequency bandwidth that the replicated transmission frame should fill.
  • the first signaling field and all the fields before it are copied and transmitted in the frequency domain in units of 20 MHz, and the first signaling field Subsequent other fields are transmitted in the manner indicated by the first signaling field.
  • Step S102 Perform, according to the copy indication information, at least one field subsequent to the first signaling field of the transmission frame in a specific bandwidth unit, so that the copied transmission frame is filled with the bandwidth information.
  • Transmission channel frequency bandwidth
  • the field to be copied is frequency-domain-copied in units of a specific bandwidth, and then the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information.
  • the specific bandwidth is 20 MHz and the transmission channel frequency bandwidth is 80 MHz
  • the first letter of the transmission frame should be One or more fields after the field are copied four times, so that the copied transmission frame is filled with the transmission channel frequency bandwidth of 80 MHz.
  • Step S103 transmitting the copied transmission frame on a transmission channel indicated by the bandwidth information.
  • the transmitting end After the preparation of the transmission frame and the partial or all fields after the first signaling field in the transmission transmission frame is completed, the transmitting end transmits the copied transmission frame on the transmission channel indicated by the bandwidth information, so that the receiving end When receiving, if it is detected that the copy indication information and the bandwidth information are in the first signaling field, the receiving end may determine the first signaling of the transmission frame received on the transmission channel frequency bandwidth indicated by the bandwidth information.
  • the merging technique can be any combination of techniques, such as selective merging, maximum ratio merging, depending on the selection and implementation of the receiving end.
  • a replication frame of a transmission frame is configured by using a physical layer convergence procedure protocol data unit (PPDU) as shown in FIG. 3.
  • the PPDU includes an old pilot (L-preamble), a first signaling field (HE-SIG-A), a short training field (HE-STF), a long training field (HE-LTF), and a data field (Data).
  • a second signaling field (HE-SIG-B) may also be included.
  • the first signaling field includes a bandwidth (English: Bandwidth, BW for short) and a duplicate indication.
  • the BW can be set to N ⁇ 20 MHz, where the specific bandwidth is 20 MHz, where The specific bandwidth is a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end does not need to re-notify the receiving end.
  • N does not represent the number of transmission channels, and it can be understood that the frequency of the transmission channel full of N ⁇ 20 MHz needs to be N times.
  • the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
  • the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver. Of course, it can also be explicitly performed in the first signaling field.
  • the identifier that is, the first signaling field contains identification information of one or more fields for performing frequency domain copying. Then, one or more fields after the first signaling field of the above 20 MHz PPDU are copied on the N ⁇ 20 MHz transmission channel frequency bandwidth, and the copied transmission frame is transmitted on the N ⁇ 20 MHz transmission channel frequency bandwidth.
  • the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
  • the transmission frame is a Trigger frame, and the data field contains scheduling information.
  • the constellation mapping may have phase rotation, in order to reduce the peak to average power ratio (English: Peak to Average Power Ratio, referred to as: PAPR). This is a general-purpose technology in the current standard where the bandwidth is greater than 20 MHz, and will not be particularly emphasized later.
  • the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in FIG. A copy of the transmission frame, in which the third 20 MHz is unused, in which case the receiving end should exclude unused subbands when performing reception or combining operations.
  • FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
  • a modulation coding method called MCS32 is proposed.
  • MCS modulation coding method
  • the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
  • MCS32 is 20MHz
  • Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
  • SINR Signal to Interference plus Noise Ratio
  • the embodiment of the present invention improves it. Please refer to the replication diagram of another transmission frame shown in FIG. 6 and FIG. 7.
  • FIG. 6 when the channel condition is good, copy in the 80 MHz bandwidth in units of 40 MHz. Two times is a better choice to reduce the time domain transmission time and improve transmission efficiency;
  • Fig. 7 when the channel conditions are poor, copying in units of 20 MHz may not be sufficient, and copying in units of 10 MHz can ensure reliability. Therefore, the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit
  • the non-replicating PPDU structure can be seen as a special case of the copy PPDU structure.
  • the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
  • the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
  • BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
  • the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
  • the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
  • the AP needs to reply to the STAs with an acknowledgement frame, that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important. At this time, the transmission of the confirmation frame can also adopt the manner of the present invention. send.
  • an acknowledgement frame that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important.
  • the transmission of the confirmation frame can also adopt the manner of the present invention. send.
  • the invention is also not limited to multi-user transmissions, but may be transmissions between an AP and a single STA.
  • the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
  • the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
  • FIG. 10 is a schematic flowchart of a method for receiving a transmission frame according to an embodiment of the present invention, where the method includes the following steps:
  • Step S201 detecting replication indication information and bandwidth information of the transmission frame in a first signaling field of the transmission frame.
  • the sending end may be an AP
  • the receiving end is one or more STAs
  • the sending end may also be a STA
  • the receiving end is an AP
  • the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
  • an AP advertises a specific 20 MHz basic channel to its associated users
  • the receiving end generally listens to the basic channel.
  • the receiving end first detects, on the basic channel, whether the first signaling field of the transmission frame includes the copy indication information and the bandwidth information, where the transmission frame includes the first signaling field, and of course, the data field and the like.
  • the copy indication information may include a copy indication, configured to indicate whether to perform frequency domain copying on one or more fields subsequent to the first signaling field of the transmission frame, where the copy indication information may further include the transmission frame of the copy Identification information of at least one field following the first signaling field; the bandwidth information refers to a transmission channel frequency bandwidth that the copied transmission frame should be full.
  • At least one field following the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling field, or, a data field and a second signaling Field.
  • the first signaling field of the transmitting end and all the previous fields thereof are copied and transmitted in the frequency domain in units of 20 MHz, and the first letter The other fields following the field are transmitted in the manner indicated by the first signaling field.
  • Step S202 receiving, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on the transport channel indicated by the bandwidth information, the at least one copy Each of the copies corresponds to a particular bandwidth in the transport channel.
  • the at least one field is specified by a protocol, or the two parties negotiate in advance, receiving one or more of at least one field after the first signaling field of the copied transmission frame on the transmission channel indicated by the bandwidth information Copies.
  • At least one field is indicated by the identification information in the copy indication information, after receiving the first signaling field of the copied transmission frame indicated by the identification information, on the transmission channel indicated by the bandwidth information One or more copies of at least one field.
  • the specific bandwidth may be a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end may not need to re-notify the receiving end.
  • the copy indication information includes a specific bandwidth used to indicate a frequency domain bandwidth unit when frequency domain copying is performed on at least one field subsequent to the first signaling field of the transmission frame.
  • Step S203 decoding the received at least one copy.
  • the receiving end decodes multiple copies of the copied field in the received transmission frame, specifically, combining the copies by using a merge technique, and then decoding the combined transmission frame, so that the copy can be accurately and reliably received.
  • the content of the field thereby improving the reliability of data transmission in the transmission frame between the sender and the receiver.
  • the merging technique can be any merging technique, such as merging, that is, the receiving end receives on a specific bandwidth, for example, the specific bandwidth is 20 MHz, and if any of the 20 MHz decoding is correct, the frame transmission is successful; Merging, that is, the receiving end combines multiple copies of the received fields on the 20 MHz and then decodes them.
  • the specific combining technique depends on the selection and implementation of the receiving end.
  • the specific bandwidth herein may also be a frequency domain bandwidth unit for indicating frequency domain copying of at least one field after the first signaling field of the transmission frame, which will be described in detail later.
  • a schematic diagram of a transmission frame is transmitted, and the transmission frame adopts a PPDU structure as shown in FIG. 3.
  • the PPDU includes L-preamble, HE-SIG-A, HE-STF, HE-LTF, and Data, and may also include HE-SIG-B.
  • the first signaling field includes a BW and a copy indication.
  • the BW may be set to be N ⁇ 20 MHz, where the transmitting end frequency-transmits one or more fields after the HE-SIG-A with a specific bandwidth. Domain replication, the specific bandwidth is 20MHz.
  • the specific bandwidth is the preset bandwidth, that is, the bandwidth that the sender and the receiver have pre-negotiated, or The pre-defined bandwidth, the sender may not need to re-notify the receiver, and the receiver receives a copy of the copied field according to the preset bandwidth agreed by the protocol.
  • the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
  • the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver.
  • the identifier may also be explicitly identified in the first signaling field, that is, the first signaling field includes identification information of one or more fields for performing frequency domain replication.
  • the receiving end decodes multiple copies of the received copied field according to the protocol convention or according to the identification information.
  • the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
  • the transmission frame is a Trigger frame, and the data field contains scheduling information.
  • the bandwidth and copy indication are located in the unique HE-SIG field.
  • the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in another transmission frame of FIG.
  • the bandwidth information is a bitmap of the transmission subchannel of the transmission transmission frame, all the transmission subchannels indicated by the bitmap together constitute a transmission channel for transmitting the transmission frame, and step S202 is specifically: the transmission indicated by the bitmap At least one copy of at least one field following the first signaling field of the replicated transmission frame is received on the channel.
  • FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
  • a modulation coding method called MCS32 is proposed.
  • MCS modulation coding method
  • the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only fixed MCS can be used (because of the MCS word in the HT-SIG)
  • MCS32 is 20MHz
  • MCS maximum frequency division multiple access
  • the segment has been set to 32 and cannot be used to indicate other modulation and coding modes of the Data section).
  • SINR Signal to Interference plus Noise Ratio
  • the embodiment of the present invention improves it.
  • the transmitting end has a bandwidth of 80 MHz in units of 40 MHz. Copying twice is a better choice, which can reduce the time domain transmission time and improve the transmission efficiency.
  • the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the receiving end decodes the copy of the received copied field according to the BU.
  • the bandwidth of the basic channel negotiated by the transmitting end and the receiving end is constant, for example, 20 MHz, however, the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit.
  • L-premble and HE-SIG-A remain unchanged, and the transmission is replicated in units of a basic channel bandwidth of 20 MHz, and only the subsequent fields are copied and transmitted.
  • the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
  • the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
  • BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
  • the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
  • the receiving end decodes the copy of the received copied field according to the copy indication information.
  • the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
  • a method for receiving a transmission frame according to an embodiment of the present invention where the transmitting end passes the transmission to be transmitted
  • the first signaling field of the frame carries a copy indication message and bandwidth information, and according to the copy indication information, at least one field after the first signaling field of the transmission frame is frequency-domain copied in a specific bandwidth, so that the copied transmission is performed.
  • the frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information, so that the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the transmission.
  • the reliability of the transmission of data in the transmission frame between the terminal and the receiving end.
  • FIG. 11 is a schematic structural diagram of a device for transmitting a transmission frame according to an embodiment of the present invention.
  • the device 1000 includes:
  • the generating unit 11 is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame.
  • the sending end may be an AP
  • the receiving end is one or more STAs
  • the sending end may also be a STA
  • the receiving end is an AP
  • the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
  • an AP advertises a specific 20 MHz basic channel to its associated users
  • the receiving end generally listens to the basic channel.
  • the generating unit 11 generates a transmission frame to be transmitted, the transmission frame including a first signaling field, and of course, a data field and the like thereafter.
  • the transmitting end writes the copy indication information and the bandwidth information in the first signaling field, where the copy indication information may include a copy indication, configured to indicate whether to transmit one or more fields after the first signaling field of the transmission frame Domain replication; this bandwidth information indicates the transmission channel frequency bandwidth that the replicated transmission frame should fill.
  • the first signaling field and all the fields before it are copied and transmitted in the frequency domain in units of 20 MHz, and the first signaling field Subsequent other fields are transmitted in the manner indicated by the first signaling field.
  • the copying unit 12 is configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information.
  • the indicated transmission channel frequency bandwidth is configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth information.
  • the copy unit 12 performs frequency domain copying of the field to be copied in units of a specific bandwidth according to the copy indication information, and then the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information. For example, if the specific bandwidth is 20 MHz and the transmission channel frequency bandwidth is 80 MHz, the transmission should be One or more fields following the first signaling field of the frame are replicated four times such that the copied transmission frame is full of the 80 MHz transmission channel frequency bandwidth.
  • the sending unit 13 is configured to send the copied transmission frame on a transport channel indicated by the bandwidth information.
  • the transmitting unit 13 transmits the copied information on the transmission channel indicated by the bandwidth information. Transmitting a frame, so that when receiving the receiving end, if the copy indication information and the bandwidth information are detected in the first signaling field, the receiving end may determine that the received channel frequency bandwidth indicated by the bandwidth information is received.
  • the merging technique can be any combination of techniques, such as selective merging, maximum ratio merging, depending on the selection and implementation of the receiving end.
  • a replication frame of a transmission frame is configured by using a physical layer convergence procedure protocol data unit (PPDU) as shown in FIG. 3.
  • the PPDU includes an old pilot (L-preamble), a first signaling field (HE-SIG-A), a short training field (HE-STF), a long training field (HE-LTF), and a data field (Data).
  • a second signaling field (HE-SIG-B) may also be included.
  • the first signaling field includes a bandwidth (English: Bandwidth, BW for short) and a duplicate indication.
  • the BW can be set to N ⁇ 20 MHz, where the specific bandwidth is 20 MHz, where The specific bandwidth is a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end does not need to re-notify the receiving end.
  • N does not represent the number of transmission channels, and it can be understood that the frequency of the transmission channel full of N ⁇ 20 MHz needs to be N times.
  • the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
  • the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver. Of course, it can also be explicitly performed in the first signaling field.
  • the identifier that is, the first signaling field contains identification information of one or more fields for performing frequency domain copying. Then, one or more fields after the first signaling field of the above 20 MHz PPDU are copied on the N ⁇ 20 MHz transmission channel frequency bandwidth, and the copied transmission frame is transmitted on the N ⁇ 20 MHz transmission channel frequency bandwidth.
  • the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
  • the transmission frame is a Trigger frame, and the data field contains scheduling information.
  • the constellation mapping may have phase rotation, in order to reduce the peak to average power ratio (English: Peak to Average Power Ratio, referred to as: PAPR). This is a general-purpose technology in the current standard where the bandwidth is greater than 20 MHz, and will not be particularly emphasized later.
  • the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in FIG. A copy of the transmission frame, in which the third 20 MHz is unused, in which case the receiving end should exclude unused subbands when performing reception or combining operations.
  • FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
  • a modulation coding method called MCS32 is proposed.
  • MCS modulation coding method
  • the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
  • MCS32 is 20MHz
  • Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
  • SINR Signal to Interference plus Noise Ratio
  • the embodiment of the present invention improves it. Please refer to the replication diagram of another transmission frame shown in FIG. 6 and FIG. 7.
  • FIG. 6 when the channel condition is good, copy in the 80 MHz bandwidth in units of 40 MHz. Two times is a better choice to reduce the time domain transmission time and improve transmission efficiency;
  • Fig. 7 when the channel conditions are poor, copying in units of 20 MHz may not be sufficient, and copying in units of 10 MHz can ensure reliability. Therefore, the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit
  • the non-replicating PPDU structure can be seen as a special case of the copy PPDU structure.
  • the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
  • the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
  • BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
  • the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
  • the solution designed by the present invention is not limited to the resource scheduling frame, but can be used for any transmission frame to improve the reliability of the transmission.
  • the AP needs to reply to the STAs with an acknowledgement frame, that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important. At this time, the transmission of the confirmation frame can also adopt the manner of the present invention. send.
  • an acknowledgement frame that is, ACK or BA. Since the transmission of the acknowledgment frame is not transmitted to each STA by the OFDMA or the MIMO method, but is broadcasted in a single frame mode (content is in the MAC layer, ie, the Data field), it needs to be received by multiple STAs, so its reliability is also particularly important.
  • the transmission of the confirmation frame can also adopt the manner of the present invention. send.
  • the invention is also not limited to multi-user transmissions, but may be transmissions between an AP and a single STA.
  • the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
  • the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
  • FIG. 12 is a schematic structural diagram of a device for receiving a transmission frame according to an embodiment of the present invention.
  • the device 2000 includes:
  • the detecting unit 21 is configured to detect the copy indication information and the bandwidth information of the transmission frame in a first signaling field of the transmission frame.
  • the sending end may be an AP
  • the receiving end is one or more STAs
  • the sending end may also be a STA
  • the receiving end is an AP
  • the sending end and the receiving end negotiate a basic channel, for example, the current In the 802.11 standard
  • an AP advertises a specific 20 MHz basic channel to its associated users
  • the receiving end generally listens to the basic channel.
  • the detecting unit 21 first detects, on the basic channel, whether the first signaling field of the transmission frame includes copy indication information and bandwidth information, and the transmission frame includes a first signaling field, and of course, a data field and the like.
  • the copy indication information may include a copy indication, configured to indicate whether to perform frequency domain copying on one or more fields subsequent to the first signaling field of the transmission frame, where the copy indication information may further include the transmission frame of the copy Identification information of at least one field following the first signaling field; the bandwidth information refers to a transmission channel frequency bandwidth that the copied transmission frame should be full.
  • At least one field following the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling field, or, a data field and a second signaling Field.
  • the first signaling field of the transmitting end and all the previous fields thereof are copied and transmitted in the frequency domain in units of 20 MHz, and the first letter The other fields following the field are transmitted in the manner indicated by the first signaling field.
  • the receiving unit 22 is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on the transport channel indicated by the bandwidth information, Each of the at least one copy corresponds to a particular one of the transmission channels.
  • the receiving unit 22 receives at least one field after the first signaling field of the copied transmission frame on the transmission channel indicated by the bandwidth information. One or more copies.
  • the receiving unit 22 receives the first letter of the copied transmission frame indicated by the identification information on the transmission channel indicated by the bandwidth information. One or more copies of at least one field following the field.
  • the specific bandwidth may be a preset bandwidth, that is, a bandwidth that has been pre-negotiated by the transmitting end and the receiving end, or a predetermined bandwidth of the protocol, and the transmitting end may not need to re-notify the receiving end.
  • the copy indication information includes a specific bandwidth used to indicate a frequency domain bandwidth unit when frequency domain copying is performed on at least one field subsequent to the first signaling field of the transmission frame.
  • the first decoding unit 23 is configured to decode the received at least one copy.
  • the first decoding unit 23 decodes multiple copies of the copy field in the transmission frame received by the receiving unit 22, specifically, the first decoding unit 23 includes: a merging unit and a second decoding unit, and a merging unit for receiving The at least one copy to be merged; the second decoding unit is configured to decode the combined transmission frame.
  • the merge technique is used to combine the copies, and then the combined transmission frames are decoded, so that the contents of the copied fields can be accurately and reliably received, thereby improving the data transmission in the transmission frame between the transmitting end and the receiving end. reliability.
  • the merging technique can be any merging technique, such as merging, that is, the receiving end receives on a specific bandwidth, for example, the specific bandwidth is 20 MHz, and if any of the 20 MHz decoding is correct, the frame transmission is successful; Merging, that is, the receiving end combines multiple copies of the received fields on the 20 MHz and then decodes them.
  • the specific combining technique depends on the selection and implementation of the receiving end.
  • the specific bandwidth herein may also be a frequency domain bandwidth unit for indicating frequency domain copying of at least one field after the first signaling field of the transmission frame, which will be described in detail later.
  • a schematic diagram of a transmission frame is transmitted, and the transmission frame adopts a PPDU structure as shown in FIG. 3.
  • the PPDU includes L-preamble, HE-SIG-A, HE-STF, HE-LTF, and Data, and may also include HE-SIG-B.
  • the first signaling field includes BW and
  • the BW can be set to N ⁇ 20 MHz, wherein the transmitting end performs frequency domain copying on one or more fields after the HE-SIG-A with a specific bandwidth of 20 MHz, where the specific bandwidth is The preset bandwidth, that is, the bandwidth that has been pre-negotiated by the sender and the receiver, or the bandwidth pre-defined by the protocol, the sender may not need to re-notify the receiver, and the receiver receives a copy of the copied field according to the preset bandwidth agreed by the protocol.
  • the copy indication may be set to 0 or 1 or other identifiers that are identifiable by both parties. For example, setting to 1 means copying one or more fields after the first signaling field in the transmission frame, and setting to 0 means not copying. .
  • the copy indication message may indicate that all fields after the first signaling field, such as HE-STF, HE-LTF, HE-SIG-B, and Data fields, are copied, or one or more of the fields may be selected for copying. Which fields are specifically copied, usually specified by the protocol in advance, or negotiated by the sender and receiver.
  • the identifier may also be explicitly identified in the first signaling field, that is, the first signaling field includes identification information of one or more fields for performing frequency domain replication.
  • the receiving end decodes multiple copies of the received copied field according to the protocol convention or according to the identification information.
  • the copy indication and the BW are located in the first signaling field HE-SIG-A, and the field to be copied and transmitted is located in the data field, and the data content in the data field may be, for example, resource allocation information.
  • the transmission frame is a Trigger frame, and the data field contains scheduling information.
  • the bandwidth and copy indication are located in the unique HE-SIG field.
  • the indication of the bandwidth is not necessarily a value, but may be a bitmap of a frequency transmission subchannel constituting the current transmission channel, as shown in another transmission frame of FIG.
  • FIG. 5 it is a schematic diagram of modulation coding of an MCS32 in the prior art.
  • a modulation coding method called MCS32 is proposed.
  • MCS modulation coding method
  • the data portion can only be repeated in units of fixed bandwidth (MCS32 is 20MHz), and only a fixed MCS can be used (because the MCS field in the HT-SIG has been set to 32, it cannot be used to indicate the Data portion.
  • MCS32 is 20MHz
  • Other modulation and coding methods due to the use of the combined technology to improve the signal to interference plus noise ratio (English: Signal to Interference plus Noise Ratio, referred to as: SINR), the Data part may use a higher MCS.
  • SINR Signal to Interference plus Noise Ratio
  • the embodiment of the present invention improves it.
  • the transmitting end has a bandwidth of 80 MHz in units of 40 MHz. Copying twice is a better choice, which can reduce the time domain transmission time and improve the transmission efficiency.
  • the information in the copy indication message needs to include a specific bandwidth, where the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame (English: Bandwidth Unit) , BU).
  • the receiving end decodes the copy of the received copied field according to the BU.
  • the bandwidth of the basic channel negotiated by the transmitting end and the receiving end is constant, for example, 20 MHz, however, the specific frequency domain bandwidth unit for performing field copying may be larger or smaller than the basic bandwidth unit.
  • L-premble and HE-SIG-A remain unchanged, and the transmission is replicated in units of a basic channel bandwidth of 20 MHz, and only the subsequent fields are copied and transmitted.
  • the resource allocation information is located in the Media Access Control layer (English: Medium Access Control, MAC for short), that is, the Data field of the PPDU structure.
  • the resource allocation information may also be located in the physical header, such as HE-SIG-B in FIG.
  • BW, Duplicate Indication, BU (optional) are located in HE-SIG-A, and the copy indicated by it is not a copy of the Data field, but a copy of HE-SIG-B.
  • the copy indication information may be at least two pieces of bit information including a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying on at least one field after the first signaling field of the transmission frame. For example, it is represented by two bit information, if 00 means no copy, 01 means copying in units of 20 MHz, 10 means copying in units of 40 MHz, and 11 means copying in units of 40 MHz.
  • the receiving end decodes the copy of the received copied field according to the copy indication information.
  • the solution designed by the present invention is It is not limited to resource scheduling frames, but can be used for any transmission frame to improve the reliability of its transmission.
  • the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency domain copying in a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
  • the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
  • FIG. 13 is a schematic structural diagram of a transmitting device for transmitting a frame according to an embodiment of the present invention, where the sending device 3000 includes: a processor 31 and a transmitter 32;
  • the processor is configured to generate a transmission frame, where the first signaling field of the transmission frame includes copy indication information and bandwidth information of the transmission frame;
  • the processor is further configured to perform frequency domain replication on at least one field after the first signaling field of the transmission frame in a specific bandwidth according to the copy indication information, so that the copied transmission frame is filled with the bandwidth.
  • the transmitter is configured to send the copied transmission frame on a transmission channel indicated by the bandwidth information.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identifier information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap of a transmission subchannel for transmitting the transmission frame, and all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame.
  • At least one field after the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling Field, or, data field and second signaling field.
  • the copy indication information includes at least two bit information of a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying of at least one field after the first signaling field of the transmission frame.
  • the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency field copying in units of a specific bandwidth, so that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
  • the receiving end can reliably receive the data in the field copied in the transmission frame, and improves the reliability field of the transmission of the data in the transmission frame between the transmitting end and the receiving end.
  • FIG. 14 is a schematic structural diagram of a receiving device for transmitting a frame according to an embodiment of the present invention, where the receiving device 4000 includes: a processor 41 and a receiver 42;
  • the processor is configured to detect, in a first signaling field of a transmission frame, replication indication information and bandwidth information of the transmission frame;
  • the receiver is configured to receive, according to the copy indication information, at least one copy of at least one field after the first signaling field of the copied transmission frame on a transport channel indicated by the bandwidth information, where the at least one copy Each copy of a copy corresponds to a particular bandwidth in the transport channel;
  • the processor is further configured to decode the received at least one copy.
  • the copy indication information includes a copy indication
  • the copy indication is used to indicate whether to perform frequency domain copying on at least one field subsequent to the first signaling field of the transmission frame.
  • the specific bandwidth is a preset bandwidth.
  • the copy indication information includes the specific bandwidth
  • the specific bandwidth is used to indicate a frequency domain bandwidth unit when frequency domain replication is performed on at least one field after the first signaling field of the transmission frame.
  • the copy indication information further includes identifier information of at least one field subsequent to the first signaling field of the transmission frame that is to be copied.
  • the bandwidth information is a bitmap for transmitting a transmission subchannel of the transmission frame, where all transmission subchannels indicated by the bitmap jointly constitute a transmission channel for transmitting the transmission frame,
  • the receiver is specifically used to:
  • the copy indication information includes at least two bit information of a frequency domain bandwidth unit for indicating whether to perform frequency domain copying and copying of at least one field after the first signaling field of the transmission frame.
  • At least one field after the first signaling field of the transmission frame includes: all fields after the first signaling field of the transmission frame, or a data field, or a second signaling Field, or, data field and second signaling field.
  • step of the processor performing the decoding of the received at least one copy comprises:
  • the transmitting end carries the first signaling of the transmission frame according to the copy indication information by carrying the copy indication message and the bandwidth information in the first signaling field of the transmission frame to be transmitted. At least one field after the field performs frequency domain copying in a specific bandwidth, such that the copied transmission frame is filled with the transmission channel frequency bandwidth indicated by the bandwidth information, and then the copied transmission frame is transmitted on the transmission channel indicated by the bandwidth information,
  • the receiving end can reliably receive the data in the field copied in the transmission frame, thereby improving the reliability of data transmission in the transmission frame between the transmitting end and the receiving end.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include a random access memory (RAM), a read-only memory (ROM), and an electrically erasable programmable read-only memory (Electrically Erasable Programmable).
  • EEPROM Electrically Error Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, Then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium.
  • DSL Digital Subscriber Line
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

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Abstract

L'invention concerne un procédé et un dispositif pour envoyer et recevoir une trame de transmission. Une extrémité émettrice inclut un message d'indication de duplication et des informations de largeur de bande dans un premier champ de signalisation d'une trame de transmission à envoyer ; l'extrémité émettrice effectue une duplication dans le domaine fréquentiel sur au moins un champ suivant le premier champ de signalisation de la trame de transmission dans une unité de largeur de bande spécifique conformément aux informations d'indication de duplication, de manière que la trame de transmission après duplication soit remplie avec une largeur de bande de fréquence de canal de transmission indiquée par les informations de largeur de bande ; et ensuite l'extrémité émettrice envoie la trame de transmission après duplication sur un canal de transmission indiqué par les informations de largeur de bande. De cette manière, une extrémité réceptrice peut recevoir de manière fiable des données dans le champ dupliqué de la trame de transmission, ce qui permet d'améliorer la fiabilité de transmission de données dans la trame de transmission entre l'extrémité émettrice et l'extrémité réceptrice.
PCT/CN2014/095300 2014-12-29 2014-12-29 Procédé, appareil et dispositif pour envoyer et recevoir une trame de transmission Ceased WO2016106489A1 (fr)

Priority Applications (2)

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CA3193621A1 (fr) 2020-12-31 2022-07-07 Huawei Technologies Co., Ltd. Procede et appareil pour reduire un rapport puissance crete/puissance moyenne dans la transmission d'unites de donnees de protocole de couche physique

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