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EP-4742800-A2 - DATA TRANSMISSION METHOD AND APPARATUS

EP4742800A2EP 4742800 A2EP4742800 A2EP 4742800A2EP-4742800-A2

Abstract

This application provides a data transmission method and an apparatus, to introduce a buffer status report BSR mechanism through multi-link ML cooperation, to improve performance of scheduling a station by an ML device. The method includes: A multi-link transmit end determines BSR signaling sent to a multi-link receive end, where the BSR signaling can enable the multi-link receive end to schedule a station of the multi-link transmit end over one or more links. Further, the multi-link transmit end sends the BSR signaling to the multi-link transmit end over the one or more links. This introduces a BSR mechanism through ML cooperation.

Inventors

  • GAN, Ming
  • HUANG, Guogang
  • LIANG, Dandan
  • YU, JIAN
  • LI, YUNBO
  • GUO, YUCHEN
  • HU, Mengshi

Assignees

  • Huawei Technologies Co., Ltd.

Dates

Publication Date
20260513
Application Date
20210315

Claims (10)

  1. A data transmission method, comprising: receiving (S711), by a multi-link receive end, a request message from a multi-link transmit end; and sending (S712), by the multi-link receive end, a response message to the multi-link transmit end, wherein: the request message and the response message are used for negotiating to set up a traffic identifier-to-link, TID-to-link, mapping relationship; the request message and/or the response message comprise/comprises mapping information and control information, wherein the mapping information indicates the TID-to-link mapping relationship, and the control information controls how to set up the TID-to-link mapping relationship, the mapping information comprises a control field and N link identifier bitmap fields, the control field comprises a TID bitmap field, the number N of the link identifier bitmap fields depends on a quantity of bits that are set to 1 in the TID bitmap field, a bit whose value is 1 in the TID bitmap field indicates that a TID identified by a position of the bit whose value is 1 in the TID bitmap field corresponds to one field of the N link identifier bitmap fields, a bit whose value is 1 in a link identifier bitmap field indicates that a TID corresponding to the link identifier bitmap field is corresponding to a link identified by a position of the bit whose value is 1 in the link identifier bitmap field, where N is a positive integer.
  2. The method according to claim 1, wherein a length of the link identifier bitmap field is fixed.
  3. The method according to claim 1, wherein if a bit in the TID bitmap field is set to 0, it indicates that a TID corresponding to the bit is mapped to all links.
  4. The method according to claim 1, wherein if bits of the TID bitmap are all set to 0, it indicates that each TID is mapped to all links.
  5. The method according to claim 1, wherein the control information indicates that a TID-to-Link mapping is accepted, accept TID-to-link mapping.
  6. The method according to claim 1, wherein the control information indicates that a TID-to-Link mapping is rejected, reject TID-to-link mapping.
  7. The method according to claim 1, wherein the control information indicates that a TID-to-Link mapping is suggested, suggest TID-to-link mapping.
  8. A multi-link receive end, configured to implement the method according to any one of claims 1 to 7.
  9. A computer-readable storage medium, configured to store a computer program, wherein the computer program comprises instructions used for implementing the method according to any one of claims 1 to 7.
  10. A computer program product, comprising computer program code, wherein when the computer program code is run on a computer, the computer implements the method according to any one of claims 1 to 7.

Description

This application claims priority to Chinese Patent Application No. 202010183125.8, filed with the China National Intellectual Property Administration on March 16, 2020 and entitled "DATA TRANSMISSION METHOD AND APPARATUS", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and more specifically, to a data transmission method and an apparatus. BACKGROUND Data traffic rapidly grows with development of the mobile Internet and popularization of smart terminals. A wireless local area network (wireless local area network, WLAN) technology with advantages of a high rate and low costs has become one of mainstream mobile broadband access technologies. To greatly improve a service transmission rate of a WLAN system, the institute of electrical and electronics engineers (institute of electrical and electronics engineers, IEEE) 802.11ax standard further uses an orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA) technology based on an existing orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) technology. The OFDMA technology supports simultaneous data sending and receiving by multiple nodes. In the IEEE 802.11ax standard, a buffer status report (buffer status report, BSR) mechanism may be used for assisting an access point (access point, AP) in uplink OFDMA scheduling. An operating frequency band range of an IEEE 802.11ax-compliant device is expanded from 2.4 GHz and 5 GHz to 2.4 GHz, 5 GHz, and 6 GHz. Due to an increasingly high user requirement for quality of service of communication, it is difficult for the IEEE 802.11 ax standard to meet user requirements in terms of a large throughput, low jitter, a low latency, and the like. Therefore, a next-generation IEEE technology, for example, the IEEE 802.11be standard, urgently needs to be developed. The IEEE 802.11be standard is referred to as an extremely high throughput (extremely high throughput, EHT) standard. An IEEE 802.11be-compliant device may reduce a service transmission delay through multi-link (multi-link, ML) cooperation. However, how to introduce the BSR mechanism to improve performance of scheduling a station by an ML device through ML cooperation becomes an urgent problem to be resolved. SUMMARY This application provides a data transmission method and an apparatus, to introduce a BSR mechanism through ML cooperation, to improve performance of scheduling a station by an ML device. According to a first aspect, a data transmission method is provided. The data transmission method may be performed by a multi-link transmit end, or may be performed by a chip or a circuit disposed in the multi-link transmit end. This is not limited in this application. The multi-link transmit end may be a multi-link station (station, STA), a multi-link AP, or another multi-link device. The data transmission method includes: The multi-link transmit end determines buffer status report BSR signaling, where the BSR signaling is used by a multi-link receive end for scheduling a station of the multi-link transmit end over one or more links. The multi-link transmit end sends the BSR signaling to the multi-link receive end over the one or more links. According to the data transmission method provided in this embodiment of this application, the multi-link transmit end sends the BSR signaling to the multi-link receive end, so that the multi-link receive end can schedule the station of the multi-link transmit end over the one or more links based on the BSR signaling. This improves, based on a BSR mechanism, performance of scheduling a station by an ML device through multi-link cooperation. With reference to the first aspect, in some implementations of the first aspect, the method further includes: The multi-link transmit end sends a request message to the multi-link receive end. The multi-link transmit end receives a response message from the multi-link receive end. The request message and the response message are used for negotiating to set up a traffic identifier-to-link TID-to-link mapping relationship. Further, according to the data transmission method provided in this embodiment of this application, before sending the BSR signaling to the multi-link receive end, the multi-link transmit end may further obtain the TID-to-link mapping relationship by negotiating with the multi-link receive end. Service buffer sizes on different links can be determined based on the TID-to-link mapping relationship, so that the multi-link transmit end can more accurately determine, based on the TID-to-link mapping relationship, the BSR signaling that needs to be sent. With reference to the first aspect, in some implementations of the first aspect, the BSR signaling includes one or more of a queue size all field of a transmission link, a scaling factor field of the transmission link, a TID field, a queue size field,