WO2022068602A1

WO2022068602A1 - Data transmission method and apparatus

Info

Publication number: WO2022068602A1
Application number: PCT/CN2021/118861
Authority: WO
Inventors: 黄国刚; 淦明; 郭宇宸; 李云波; 李伊青
Original assignee: 华为技术有限公司
Priority date: 2020-09-29
Filing date: 2021-09-16
Publication date: 2022-04-07
Also published as: CN114340041A

Abstract

A data transmission method and apparatus, which relate to the technical field of communication. The data transmission method comprises: generating a first frame, wherein the first frame includes re-mapping reason information, and the re-mapping reason information is used for indicating a re-mapping reason; and sending the first frame. Reason information for establishing a mapping relationship between a service identifier and a link is carried in a radio frame, such that according to the reason information, a response-end device can quickly and accurately establish, with a request-end device, a mapping relationship between the service identifier and the link, thereby avoiding signaling overheads and time delay caused by repeated negotiation.

Description

Data transmission method and device

This application claims the priority of the Chinese patent application with the application number 202011058049.4 and the invention titled "Data Transmission Method and Device" filed with the State Intellectual Property Office on September 29, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a data transmission method and apparatus.

Background technique

With the development of wireless communication technology, more and more wireless communication devices support multi-link communication. For example, it supports communication on multiple links in different communication frequency bands (eg, 2.4GHz, 5GHz, 6GHz, etc.), or supports communication on different channels in the same communication frequency band, so as to improve the communication efficiency of the communication device. Among them, a communication device that supports multi-link communication may be called a multi-link device (MLD). Multilink devices include multilink access points (access points, APs) and multilink stations (stations, STAs).

Before communication between a multi-link AP and a multi-link STA, a multi-link needs to be established. In the process of establishing a multi-link, a mapping relationship can be established between a traffic identifier (traffic identifier, TID) and a link. Therefore, in the subsequent multi-link communication process, service management can be better performed. For example, according to the rate or service delay characteristics of different links, different service identifiers are mapped to corresponding links, so as to provide different service qualities for different services.

In the process of establishing the mapping relationship between services and links, the requesting end device (such as a multi-link AP device or a multi-link STA device) will send a request to the responding end device (such as a multi-link STA device) according to its own link conditions and/or service requirements. A link AP device or a multi-link STA device) sends a mapping relationship between services and links. However, the mapping relationship may not meet the requirements of the responder device, resulting in failure to establish the mapping relationship.

It can be seen that multiple times of negotiation are required between the multi-link AP and the multi-link STA before the mapping relationship between services and links can be successfully established. Therefore, how to quickly and effectively establish a mapping relationship between services and links is an urgent technical problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a data transmission method and device, which are used for carrying relevant auxiliary information for establishing a mapping relationship between a service identifier and a link in a radio frame, so that a responder device can quickly and accurately establish and request a terminal according to the relevant auxiliary information. The mapping relationship between service identifiers and links between devices avoids signaling overhead and delay caused by repeated negotiation.

A first aspect provides a data transmission method, the method comprising: generating a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate the remapping cause. Send the first frame.

The method may be executed by a first device (such as a multi-link AP or a multi-link STA), or may be executed by a component in the first device (such as a chip system).

Based on the above technical solution, the first device notifies the second device of the reason for initiating establishment of the mapping relationship between the service identifier and the link. In this way, the second device can establish the mapping relationship between the service identifier and the link according to the reason, thereby avoiding the established mapping relationship that does not meet the requirements of the first device, resulting in failure of TID-to-link mapping negotiation, and improving TID-to-link mapping. Link mapping negotiation efficiency.

In a possible implementation manner, the remapping reason information is carried in one or more of the following fields: the maximum number of links allowed to be opened field, the closed link set information field, the link quality report information field, the service quality QoS report Information field; wherein, the maximum number of links allowed to be opened subfield is used to indicate the maximum number of links allowed to be opened; the closed link set information field is used to indicate the set of links that need to be closed; the link quality report information field is used to indicate the chain Road quality information; the QoS report information field is used to indicate service quality information.

Optionally, the link quality information includes, for example, the following item or items: RSSI value of received signal strength indication, SINR value of signal-to-interference and noise ratio, indication information of whether RSSI satisfies the first condition, and indication of whether SINR satisfies the second condition information.

Optionally, the service quality information includes, for example, a QoS value, or indication information of whether the QoS satisfies the third condition.

In this way, different remapping reasons are carried in different fields, and after receiving the first frame, the responder device can obtain the corresponding remapping reasons in the corresponding fields.

In a possible implementation manner, the first frame includes first indication information, and the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information is carried in the control field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield. Wherein, the first subfield is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame. The first subfield and/or the second subfield are used to indicate whether the down link set information field is present in the first frame. The third subfield is used to indicate whether the link quality report information field is present in the first frame. The fourth subfield is used to indicate whether the QoS report information field is present in the first frame.

In this way, the remapping cause information contained in the first frame is indicated by the first subfield, the second subfield, the third subfield and the fourth subfield. According to the instruction, the responder device can obtain the remapping reason in the corresponding field to realize the rapid negotiation of TID-to-link mapping.

In a possible implementation manner, the first frame includes first indication information, and the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information is carried in the remapping cause field, and the first value and/or the second value of the remapping cause field is used to indicate whether the closed link set information field appears in the first frame. The third value of the remapping reason field is used to indicate whether the link quality report information field appears in the first frame. The fourth value of the remapping reason field is used to indicate whether the QoS report information field appears in the first frame.

In a possible implementation manner, the first frame includes first indication information, and the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information is carried in the control field and the remapping reason field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield. Wherein, the first subfield and the first value of the remapping reason field are used to indicate whether the field of the maximum number of links allowed to be opened appears in the first frame. The first subfield, the second subfield, the first value of the remapping cause field, and one or more of the second value of the remapping cause field are used to indicate whether the closed link set information field appears in the in the first frame. The third subfield and the third value of the remapping reason field are used to indicate whether the RSSI link quality report information field appears in the first frame. The fourth subfield and the fourth value of the remapping reason field are used to indicate whether the QoS report information field appears in the first frame.

In this way, through the first subfield, the second subfield, the third subfield, the fourth subfield, and the indication of the remapping reason field, double acknowledgment, and then determine whether the first frame contains the closed link set information field, and /or link quality report information field, and/or QoS report information field, to improve the transmission accuracy of remapping cause information.

It can be understood that the effective remapping cause can be transmitted only when the remapping cause information carried in the control field and the remapping cause field does not conflict.

In a possible implementation manner, the method further includes: receiving a second frame, where the second frame carries second service identifier mapping information, the second service identifier mapping information is based on a remapping reason, and the second service identifier mapping information It is used to indicate the second mapping relationship between the service identifier and the link.

Specifically, the second device determines the second mapping relationship between the service identifier and the link based on the first remapping reason and some of its own considerations, such as the requirement for the link transmission rate, to generate the second frame.

In a possible implementation manner, the second service identifier mapping information is carried in the service identifier and link mapping information field, and the service identifier and link mapping information field are used to utilize the correspondence between the service identifier and the bitmap of the link Indicates the second mapping relationship. Alternatively, the service identifier and link mapping information field is used to indicate the second mapping relationship by using the correspondence between the link identifier and the bitmap of the service identifier. Or, the service identification and link mapping information field includes a fifth subfield, and the fifth value of the fifth subfield is used to indicate the corresponding relationship between the service identification and the link mapping information field using the service identification and the bitmap of the link. Indicates the second mapping relationship; the sixth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field indicate the second mapping relationship by using the corresponding relationship between the link identifier and the bitmap of the service identifier. Or, the service identification and link mapping information field includes a fifth subfield, and the seventh value of the fifth subfield is used to indicate the corresponding relationship between the service identification and the link mapping information field using the service identification and the bitmap of the link. Indicate the second mapping relationship; the eighth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field use the corresponding relationship between the link identifier and the bitmap of the service identifier to indicate the second mapping relationship; the fifth subfield indicates the second mapping relationship; The ninth value of the field is used to indicate that the service identifier and the link mapping information field indicate the second mapping relationship by using the corresponding relationship between the bitmap of the link and the bitmap of the service identifier. Alternatively, the service identifier and link mapping information field includes a fifth subfield, and the tenth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the service identifier and the bitmap of the link. Indicate the second mapping relationship; the eleventh value of the fifth subfield is used to indicate that the service identifier and the link mapping information field use the corresponding relationship between the bitmap of the service identifier and the bitmap of the link to indicate the second mapping relationship . Alternatively, the service identifier and link mapping information field includes a fifth subfield, and the twelfth value of the fifth subfield is used to indicate that the service identifier and link mapping information field utilize the bitmap of the link identifier and the service identifier. The corresponding relationship indicates the second mapping relationship; the thirteenth value of the fifth subfield is used to indicate that the service identification and the link mapping information field utilize the corresponding relationship of the bitmap of the link and the bitmap of the service identification to indicate the second. Mapping relations.

In this way, through any of the above six methods, the transmission of service identification mapping information can be flexibly realized, so that the responding end device can quickly learn the mapping relationship between the service identification and the link, and complete the TID-to-link mapping. negotiate.

In a possible implementation manner, the second service identifier mapping information also carries the direction of the second mapping relationship between the service identifier and the link.

Optionally, the control field further includes a service identification direction subfield, which is used to indicate the direction of the service identification. For example, if the service identification direction subfield occupies 1 bit, it is used to indicate whether the TID is unidirectional or bidirectional. The direction of the one-way indication is the same as the TID direction corresponding to the device sending the first frame. Bidirectional includes the upstream direction and the downstream direction. For another example, if the service identification direction subfield occupies 2 bits, it is used to indicate whether the TID is an uplink direction, a downlink direction or bidirectional. For example, 10 indicates the upstream direction, 01 indicates the downstream direction, 11 indicates the bidirectional direction, and 00 is the reserved value.

In a possible implementation manner, the method further includes: sending a third frame, where the third frame is used to indicate a positive response or a negative response to the second frame.

That is to say, the third frame indicates whether the first device accepts the second mapping relationship, or indicates whether the second mapping relationship is successfully established.

In this way, after receiving the third frame, the second device can determine whether the TID-to-link mapping is successfully established.

In a possible implementation manner, the first frame further includes first service identifier mapping information, the first service identifier mapping information is based on a remapping reason, and the first service identifier mapping information is used to indicate the relationship between the service identifier and the link The first mapping relationship of .

Optionally, the first device may first determine a mapping relationship between a set of service identifiers and links according to the remapping reason. Then, subsequently, the second device may choose to accept, modify or replace the mapping relationship to improve negotiation efficiency.

In a possible implementation manner, the method further includes: the second frame also carries a status code, where the status code is used to indicate whether the mapping relationship between the service identifier and the link is successfully established.

In a possible implementation manner, if the establishment of the mapping relationship between the service identifier and the link fails, the status code carries the reason for the establishment failure.

In this way, the first device can determine whether the mapping relationship between the service identifier and the link is successfully established according to the status code. Further, if the establishment fails, it is determined whether to accept the second service identifier mapping information.

In a possible implementation manner, the first frame also carries a remapping mode, and the remapping mode includes an immediate remapping mode or a delayed remapping mode.

The immediate remapping mode means that after the negotiation of the mapping relationship between the service identifier and the link is successful, remapping is performed immediately according to the negotiated TID-to-link mapping. Delayed remapping mode means that after the negotiation of the mapping relationship between the service ID and the link is successful, remapping is performed according to the negotiated TID-to-link mapping after waiting for a period of time.

Specifically, for some devices with weak capabilities, it may not be possible to immediately move a protocol data unit (MAC protocol data unit MAC, MPDU) on one link to another link for transmission, that is, remapping cannot be performed immediately. Therefore, a preset waiting time is required. Correspondingly, in the first frame, the waiting period may also be indicated by the remapping delay timer field, so as to successfully complete the remapping.

In a second aspect, a data transmission method is provided, the method comprising: receiving a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate the remapping cause. Parse the first frame.

In a possible implementation manner, the first frame includes first indication information, and the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information is carried in the remapping reason field. The first value of the remapping reason field is used to indicate whether the field of the maximum number of links allowed to be opened appears in the first frame. The first value and/or the second value of the remapping reason field is used to indicate whether the closed link set information field appears in the first frame. The third value of the remapping reason field is used to indicate whether the link quality report information field appears in the first frame. The fourth value of the remapping reason field is used to indicate whether the QoS report information field appears in the first frame.

In a possible implementation manner, the first frame includes first indication information, and the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information is carried in the control field and the remapping reason field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield. Wherein, the first subfield and the first value of the remapping reason field are used to indicate whether the field of the maximum number of links allowed to be opened appears in the first frame. The first subfield, the second subfield, the first value of the remapping cause field, and one or more of the second value of the remapping cause field are used to indicate whether the closed link set information field appears in the in the first frame. The third subfield and the third value of the remapping reason field are used to indicate whether the link quality report information field appears in the first frame. The fourth subfield and the fourth value of the remapping reason field are used to indicate whether the QoS report information field appears in the first frame.

In a possible implementation manner, the method further includes: generating a second frame, where the second frame carries second service identifier mapping information, the second service identifier mapping information is based on a remapping reason, and the second service identifier mapping information uses is used to indicate the second mapping relationship between the service identifier and the link. Send the second frame.

In a possible implementation manner, the method further includes: receiving a third frame, where the third frame is used to indicate an affirmative acknowledgment or a negative acknowledgment to the second frame.

In addition, for the technical effect of the data transmission method of the second aspect, reference may be made to the technical effect of the data transmission method of the first aspect, which will not be repeated here.

In a third aspect, a data transmission method is provided, the method comprising: sending, on a first link, a management frame on a failed second link and a target link identifier, where the target link identifier is used to indicate a receiving end multi-link The device MLD forwards the received management frame to the module corresponding to the target link identifier.

The management frame is a unicast management frame sent by the first device to a module in the second device, and the target link identifier is used to point to the module. A module refers to a device in an MLD device. For example, an AP in the AP MLD. Another example is a certain STA in the STA MLD.

Based on the above technical solution, using the target link identifier, in the case of some links failure or unreachable, the management frame that should be sent can also be sent to the lower MAC layer corresponding to the failed or unreachable link, avoiding management Frame transmission failed.

In a possible implementation manner, the method further includes: sending a reporting link identifier on the first link, where the reporting link identifier is used to instruct the receiving end MLD to send a response on the first link corresponding to the reporting link identifier frame.

In a possible implementation manner, the target link identifier and the reporting link identifier are carried in the aggregation control A-control field of the MAC frame.

Exemplarily, the management frame includes a reporting link identifier (reporting link ID) and a destination link identifier (destination link ID). The reporting link identifier includes a reporting link identifier, which is used to indicate the identifier of the link that actually sends the management frame. The target link identifier includes the target link identifier, which is used to indicate the identifier of the final link to be forwarded to.

In a possible implementation manner, the management frame, the target link identifier and the reporting link identifier are carried in the frame body of the functional frame.

Optionally, a new function frame is defined, and the function frame carries the transparently transmitted management frame, the target link identifier and the reporting link identifier.

In a fourth aspect, a data transmission method is provided, the method comprising: receiving, on the first link, a management frame and a target link identifier on a failed second link. According to the target link identifier, it is determined to forward the received management frame to the module corresponding to the target link identifier.

In a possible implementation manner, the reporting link identifier is received on the first link, and the reporting link identifier is used to indicate that the response frame is sent on the first link corresponding to the reporting link identifier.

In addition, for the technical effect of the data transmission method of the fourth aspect, reference may be made to the technical effect of the data transmission method of the third aspect, which will not be repeated here.

In a fifth aspect, a data transmission device is provided, including a processing module and a communication module. The processing module is configured to generate a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate the remapping cause. The communication module is used to send the first frame.

In a possible implementation manner, the communication module is further configured to receive a second frame, where the second frame carries second service identifier mapping information, the second service identifier mapping information is based on a remapping reason, and the second service identifier mapping information It is used to indicate the second mapping relationship between the service identifier and the link.

In a possible implementation manner, the communication module is further configured to send a third frame, where the third frame is used to indicate a positive response or a negative response to the second frame.

Optionally, the communication module may include a receiving module and a sending module. Among them, the receiving module is used to receive data sent by other devices. The sending module is used to send data to other devices. The specific implementation manner of the communication module is not specifically limited in this embodiment of the present application.

Optionally, the communication device according to the fifth aspect may further include a storage module, where the storage module stores programs or instructions. When the processing module executes the program or the instruction, the data transmission apparatus described in the fifth aspect can execute the data transmission method described in the first aspect.

It should be noted that the data transmission device described in the fifth aspect may be an AP or a STA, or may be a chip or a chip system provided in the AP or STA, which is not limited in this application.

For the technical effect of the data transmission apparatus described in the fifth aspect, reference may be made to the technical effect of the data transmission method described in the first aspect, which will not be repeated here.

In a sixth aspect, a data transmission device is provided, including a processing module and a communication module. The communication module is configured to receive a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate the remapping cause. Processing module for parsing the first frame.

In a possible implementation manner, the processing module is further configured to generate a second frame, where the second frame carries second service identifier mapping information, the second service identifier mapping information is based on a remapping reason, and the second service identifier mapping information It is used to indicate the second mapping relationship between the service identifier and the link. The communication module is also used for sending the second frame.

In a possible implementation manner, the second service identifier mapping information is carried in the service identifier and link mapping information field, and the service identifier and link mapping information field are used to utilize the correspondence between the service identifier and the bitmap of the link Indicates the second mapping relationship. Alternatively, the service identifier and link mapping information field is used to indicate the second mapping relationship by using the correspondence between the link identifier and the bitmap of the service identifier. Or, the service identification and link mapping information field includes a fifth subfield, and the fifth value of the fifth subfield is used to indicate the corresponding relationship between the service identification and the link mapping information field using the service identification and the bitmap of the link. Indicates the second mapping relationship; the sixth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field indicate the second mapping relationship by using the corresponding relationship between the link identifier and the bitmap of the service identifier. Or, the service identification and link mapping information field includes a fifth subfield, and the seventh value of the fifth subfield is used to indicate the corresponding relationship between the service identification and the link mapping information field using the service identification and the bitmap of the link. Indicate the second mapping relationship; the eighth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field use the corresponding relationship between the link identifier and the bitmap of the service identifier to indicate the second mapping relationship; the fifth subfield indicates the second mapping relationship; The ninth value of the field is used to indicate that the service identifier and the link mapping information field indicate the second mapping relationship by using the corresponding relationship between the bitmap of the link and the bitmap of the service identifier. Alternatively, the service identifier and link mapping information field includes a fifth subfield, and the tenth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the service identifier and the bitmap of the link. Indicate the second mapping relationship; the eleventh value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the corresponding relationship between the bitmap of the service identifier and the bitmap of the link to indicate the second mapping relationship . Alternatively, the service identifier and link mapping information field includes a fifth subfield, and the twelfth value of the fifth subfield is used to indicate that the service identifier and link mapping information field utilize the bitmap of the link identifier and the service identifier. The corresponding relationship indicates the second mapping relationship; the thirteenth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the corresponding relationship of the bitmap of the link and the bitmap of the service identifier to indicate the second. Mapping relations.

In a possible implementation manner, the communication module is further configured to receive a third frame, where the third frame is used to indicate a positive response or a negative response to the second frame.

In a possible implementation manner, the second frame also carries a status code, and the status code is used to indicate whether the mapping relationship between the service identifier and the link is successfully established.

Optionally, the communication device according to the sixth aspect may further include a storage module, where the storage module stores programs or instructions. When the processing module executes the program or instruction, the data transmission apparatus described in the sixth aspect can execute the data transmission method described in the second aspect.

It should be noted that the data transmission device described in the sixth aspect may be an AP or a STA, or a chip or a chip system provided in the AP or STA, which is not limited in this application.

For the technical effect of the data transmission apparatus described in the sixth aspect, reference may be made to the technical effect of the data transmission method described in the second aspect, which will not be repeated here.

In a seventh aspect, a data transmission device is provided, including a communication module. Wherein, the communication module is used to send the management frame on the failed second link and the target link identifier on the first link, and the target link identifier is used to indicate the management frame to be received by the multi-link device MLD at the receiving end Forward to the module corresponding to the target link ID.

In a possible implementation manner, the communication module is further configured to send a reporting link identifier on the first link, where the reporting link identifier is used to instruct the receiving end MLD to send on the first link corresponding to the reporting link identifier response frame.

Optionally, the communication device according to the seventh aspect may further include a processing module and a storage module, where the storage module stores programs or instructions. When the processing module executes the program or the instruction, the data transmission apparatus described in the seventh aspect can execute the data transmission method described in the third aspect.

It should be noted that the data transmission device described in the seventh aspect may be an AP or a STA, or may be a chip or a chip system provided in the AP or STA, which is not limited in this application.

For the technical effect of the data transmission apparatus described in the seventh aspect, reference may be made to the technical effect of the data transmission method described in the third aspect, which will not be repeated here.

In an eighth aspect, a data transmission device is provided, including a processing module and a communication module. The communication module is configured to receive, on the first link, the management frame and the target link identifier on the failed second link. The processing module is configured to determine, according to the target link identifier, to forward the received management frame to the module corresponding to the target link identifier.

In a possible implementation manner, the communication module is further configured to receive a reporting link identifier on the first link, where the reporting link identifier is used to indicate that the response frame is sent on the first link corresponding to the reporting link identifier.

In a possible implementation manner, the management frame carries, the target link identifier and the reporting link identifier are carried in the frame body of the functional frame.

Optionally, the communication device according to the eighth aspect may further include a storage module, where the storage module stores programs or instructions. When the processing module executes the program or the instruction, the data transmission apparatus described in the eighth aspect can execute the data transmission method described in the fourth aspect.

It should be noted that the data transmission device described in the eighth aspect may be an AP or a STA, or a chip or a chip system provided in the AP or STA, which is not limited in this application.

For the technical effect of the data transmission apparatus described in the eighth aspect, reference may be made to the technical effect of the data transmission method described in the fourth aspect, which will not be repeated here.

In a ninth aspect, a data transmission device is provided, the data transmission device includes a processor and a transceiver, and the processor and the transceiver are used to implement any one of the methods provided in any one of the first to fourth aspects above. Wherein, the processor is configured to perform processing actions in the corresponding method, and the transceiver is configured to perform the actions of receiving/transmitting in the corresponding method.

In a tenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the functions provided in any one of the first to fourth aspects. any method.

An eleventh aspect provides a computer program product comprising computer instructions, which, when the computer instructions are executed on a computer, cause the computer to perform any one of the methods provided in any one of the first to fourth aspects.

A twelfth aspect provides a chip, comprising: a processing circuit and a transceiver pin, where the processing circuit and the transceiver pin are used to implement any one of the methods provided in any one of the foregoing first to fourth aspects. Wherein, the processing circuit is used for executing the processing actions in the corresponding method, and the transceiver pins are used for executing the actions of receiving/transmitting in the corresponding method.

Description of drawings

FIG. 1 is a schematic diagram 1 of a communication system provided by an embodiment of the present application;

FIG. 2 is a second schematic diagram of a communication system provided by an embodiment of the present application;

3 is a schematic diagram of a frame structure of a multi-link information unit provided by an embodiment of the present application;

4 is a schematic diagram of a frame structure of a target wake-up time unit provided by an embodiment of the present application;

5 is a schematic diagram of a frame format of a first frame provided by an embodiment of the present application;

6 is a schematic diagram 1 of a frame structure of a service identifier and a link mapping information field provided by an embodiment of the present application;

7 is a schematic diagram 2 of a frame structure of a service identifier and a link mapping information field provided by an embodiment of the present application;

8 is a schematic diagram 3 of a frame structure of a service identifier and a link mapping information field provided by an embodiment of the present application;

9 is a fourth schematic diagram of a frame structure of a service identifier and a link mapping information field provided by an embodiment of the present application;

FIG. 10 is a schematic flowchart 1 of a data transmission method provided by an embodiment of the present application;

FIG. 11 is a second schematic flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 12 is a third schematic flowchart of a data transmission method provided by an embodiment of the present application;

13 is a schematic structural diagram of an AP MLD and a STA MLD participating in communication provided by an embodiment of the present application;

FIG. 14 is a fourth schematic flowchart of a data transmission method provided by an embodiment of the present application;

15 is a schematic diagram of a frame format of a transparently transmitted management frame provided by an embodiment of the present application;

16 is a schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application;

FIG. 17 is a schematic structural diagram of another data transmission apparatus provided by an embodiment of the present application.

Detailed ways

In the description of this application, unless otherwise stated, "/" means "or", for example, A/B can mean A or B. In this article, "and/or" is only an association relationship to describe the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone these three situations. Further, "at least one" means one or more, and "plurality" means two or more. The words "first" and "second" do not limit the quantity and execution order, and the words "first", "second" and the like do not limit certain differences.

In this application, the words "exemplary" or "such as" are used to mean serving as an example, illustration, or illustration. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

First, as shown in Table 1 below, the abbreviations of the terms involved in this application are introduced.

Table 1

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application. For example, the communication system adopts a system of the IEEE 802.11 standard. Exemplarily, the IEEE 802.11 standard includes, but is not limited to, the 802.11be standard, or the next-generation 802.11 standard. The applicable scenarios of the technical solution of the present application include: communication between AP and STA, communication between AP and AP, and communication between STA and STA. As shown in FIG. 1 , the communication system includes at least one multi-link AP 100 and at least one multi-link STA 200. For example, multi-link STA 200 includes multi-link STA 1, multi-link STA 2 and multi-link STA 3.

Optionally, the STA involved in this embodiment of the present application may be various user terminals, user devices, access devices, user stations, user units, mobile stations, user agents, user equipment or other names with wireless communication functions, wherein , the user terminal may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to the wireless modem, as well as various forms of user equipment (UE), mobile station (mobile station, MS), terminal (terminal), terminal equipment (terminal equipment), portable communication device, hand-held, portable computing device, entertainment device, gaming device or system, global positioning system device or is configured to communicate via a wireless medium Any other suitable device for network communication, etc. Here, for the convenience of description, the devices mentioned above are collectively referred to as stations, or STAs, or multi-link STAs, or multi-link STA devices, or STA MLDs, or non-access point stations (non-access point stations, non-access point stations) -AP STA), or non-AP MLD.

Optionally, the access point AP involved in this embodiment of the present application is a device deployed in a wireless communication network to provide a wireless communication function for its associated STA, and the access point AP can be used as the center of the communication system. , which can be communication devices such as base stations, routers, gateways, repeaters, communication servers, switches, or bridges, where the base stations can include various forms of macro base stations, micro base stations, and relay stations. Here, for the convenience of description, the devices mentioned above are collectively referred to as access point AP, or multi-link AP, or multi-link AP device, or AP MLD.

For ease of understanding, related terms and concepts that may be involved in the embodiments of the present application are first introduced below.

1) Multi-link communication

During the evolution of cellular networks and WLANs, MLDs can transmit and receive data through multiple links. Multilinks can be deployed on multi-bands, where there can be one or more links on a band. The multiple frequency bands may include, but are not limited to, the following frequency bands: a 2.4 GHz Wi-Fi frequency band, a 5 GHz Wi-Fi frequency band, and a 6 GHz Wi-Fi frequency band. Also, MLD can communicate over multiple channels on the same frequency band. The multiple frequency bands or multiple channels may be collectively referred to as multiple links. Through multi-link communication, the peak throughput is increased, the delay of service transmission is reduced, and the communication rate between MLDs is improved.

Exemplarily, as shown in FIG. 2 , the multi-link AP includes M APs, such as AP#1 to AP#M. The M APs are in one-to-one correspondence with the M links supported by the multi-link AP. A multi-link STA may include N STAs, such as STA#1 to STA#N. The N STAs are in one-to-one correspondence with the N links supported by the multi-link STA. Wherein, M and N are both integers greater than 1. M may or may not be equal to N.

Among the multi-link STAs, a STA working on one link can be associated with an AP working on the same link among the multi-link APs, so that the STA and the AP can perform data transmission through the link. For example, STA#1 in the multilink STA is associated with AP#1 in the multilink AP, so that communication between STA#1 and AP#1 is performed through link 1. STA#2 in the multi-link STA is associated with AP#2 in the multi-link AP, so that communication between STA#2 and AP#2 is performed through link 2. STA#3 in the multi-link STA is associated with AP#3 in the multi-link AP, so that communication between STA#3 and AP#3 is performed through link 3. By analogy, no further description will be given.

Further, the links between the multi-link STA and the multi-link AP can be deployed in the same or different frequency bands. For example, if Link 1 is deployed in the 2.4GHz Wi-Fi band, AP#1 works in the 2.4GHz Wi-Fi band. Link 2 is deployed in the 5GHz Wi-Fi band, and AP#2 works in the 5GHz Wi-Fi band. Link 3 is deployed in the 6GHz Wi-Fi band, and AP#3 works in the 6GHz Wi-Fi band.

In this embodiment of the present application, the AP/STA corresponding to the link may be described as: the AP/STA working on the link.

It will be appreciated that multi-link devices can communicate with other devices. In this embodiment of the present application, other devices may be multi-link devices or may not be multi-link devices.

2) Multi-link establishment

Before the multi-link STA and the multi-link AP perform multi-link communication, the multi-link STA may send an association request frame to the multi-link AP, and the association request frame carries the multi-link information on the STA side. After receiving the association request frame, the multi-link AP sends an association response frame to the multi-link STA device, and the association response frame carries the multi-link information on the AP side. Through the interaction of the multi-link information, the establishment of the multi-link between the multi-link STA and the multi-link AP is realized, and then the multi-link communication is realized on the established multi-link.

Exemplarily, the multi-link information can be carried by a multi-link information element (ML element). FIG. 3 shows a schematic diagram of a frame structure of a multi-link information unit. As shown in Figure 3, the multi-link information unit includes: an element ID (element ID) field, a length (length) field, an element ID extension (element ID extension) field, a control (control) field, and a multi-link device public information ( MLD common info) field and zero or more link profile subelement fields.

The public information field of the multi-link device carries the public information of the MLD on all multi-links. For example, the public information includes the MAC address of the MLD and the like. Each link information subunit carries the dedicated information of each corresponding link. For example, the proprietary information includes capability information of the MLD site on each link, and the like.

3) Upward direction, downward direction

The uplink direction refers to the transmission direction in which the STA sends data to the AP.

The downlink direction refers to the transmission direction in which the AP sends data to the STA.

Exemplarily, as shown in FIG. 2 , the transmission direction in which STA#1 sends data to AP#1 is the uplink direction, and the transmission direction in which AP#2 sends data to STA#2 is the downlink direction.

4) Service identification and link mapping (TID-to-link mapping)

With the development of communication technology, multi-link technology can support more and more types of services. In order to better manage services, a mapping relationship can be established between services and links to provide different services for different services. Purpose of service. Establishing a mapping relationship between services and links may be implemented as establishing a mapping relationship between service identifiers and links by presetting a service identifier corresponding to the service.

Exemplarily, the service identifiers of non-important services may be mapped to some links, and the service identifiers of important services may be mapped to all links, so as to improve the efficiency and accuracy of executing important services. Alternatively, the service identifiers of different services are mapped to corresponding links according to the rates of different links and the delay characteristics of services.

In some scenarios, during the multi-link establishment process, a mapping relationship between service identifiers and links is established.

Wherein, if the operation of establishing the mapping relationship between service identifiers and links is not performed during the multi-link establishment process, all service identifiers are mapped to each established link by default.

In other scenarios, after the multi-link is established, due to reasons such as device movement or service change, it may be necessary to perform remapping between service identifiers and links to establish a remapping relationship that conforms to the current situation to meet service requirements. For example, after the STA MLD moves, it reaches the edge of the AP signal coverage, so that the delay-sensitive services on some links do not meet the QoS requirements, and the mapping relationship between the service identifier and the link needs to be re-established to reduce the service transmission delay.

Wherein, the device requesting the establishment of service identification and link mapping may be a STA MLD or an AP SLD.

5) Target wake time (target wake time, TWT) negotiation

In the IEEE 802.11ax standard, it is proposed that the STA and the AP negotiate through the TWT to determine the same TWT parameters, for example, including the schedule. This schedule includes sleep periods, such as beacon periods. After the TWT negotiation, the STA can periodically sleep and wake up according to the sleep cycle to save energy. During the TWT negotiation process, the STA may act as the requester device that initiates the TWT negotiation, and initiate a TWT negotiation request to the AP that is the responder device. Alternatively, the AP may act as the requester device that initiates the TWT negotiation, and initiate a TWT negotiation request to the STA that is the responder device.

Wherein, in the TWT negotiation process, the request mode of the requesting end device includes any one of the following: requesting TWT parameters, suggesting TWT parameters, and requiring TWT parameters. The requester device will perform different operations in different request modes according to its own needs, and send the corresponding TWT negotiation request to the responder device. After receiving the TWT negotiation request, the responder device will perform corresponding operations according to different request methods. As shown in Table 2 below, operations performed by the requester device and the responder device under different request modes are shown.

Table 2

Correspondingly, the operation performed by the responder device corresponds to any of the following response modes: accepting TWT parameters, replacing TWT parameters, specifying TWT parameters, and rejecting TWT parameters. As shown in Table 3 below, it shows the specific operations that the responder device needs to perform in different response modes.

table 3

Exemplarily, FIG. 4 shows a schematic diagram of a frame structure of a TWT element. As shown in FIG. 4 , the TWT unit includes an element ID (element ID) field, a length (length) field, a TWT request (TWT request) field, and a TWT setup command (TWT setup command) field. Among them, the TWT request field occupies 1 bit, which is used to indicate the device type that sends the TWT unit. For example, when the value of the TWT request field is 1, it indicates that the device sending the TWT unit is the requesting end device; when the value of the TWT request field is 0, it indicates that the device sending the TWT unit is the responding end device. The TWT setup command field occupies 3 bits, which are used to indicate the type of TWT setup. Actions to be performed when sending a site.

Table 4

It should be noted that in Table 4 above, N/A means not applicable (not applicable).

The above is an introduction to the related terms and concepts involved in the embodiments of the present application, which will not be repeated below.

In the prior art, some schemes propose to use the above-mentioned TWT negotiation rules to exchange TID-to-link mapping between the requesting end device and the responding end device, so as to realize the establishment of service identifiers and links between the requesting end device and the responding end device. Mapping relationships to improve business efficiency.

However, if the TWT negotiation rules are directly applied to the scenario of establishing the mapping relationship between service identifiers and links, based on the above Table 2-Table 4, it can be seen that problems will occur at least in the following negotiation scenarios:

(1) The request method is to suggest the TID-to-link mapping parameter, and the response method is to replace the TID-to-link mapping parameter.

Exemplarily, the requesting end device is congested due to too many services carried on link 1, and after mapping some service identifiers on link 1 to other links, obtains the mapping relationship 1, and initiates remapping to the responding end device. Negotiate the request and send the mapping relationship 1 to the responder device. After receiving the mapping relationship 1, the responder device will modify some or all of the mapping relationships in the mapping relationship 1 according to its own needs because it does not know the reason why the requesting device requires remapping, and may still map some service identifiers. To link 1, get the mapping relationship 2. After receiving the mapping relationship 2, the requester device determines that the mapping relationship 2 cannot be implemented, and needs to send the updated mapping relationship to the responder device again for negotiation. In this way, after multiple negotiation, the requesting end device and the responding end device can re-establish the mapping relationship between the service identifier and the link, which is inefficient.

(2) The request method is to request the TID-to-link mapping parameter or suggest the TID-to-link mapping parameter, and the response method is to specify the TID-to-link mapping parameter.

In the current scenario, the mapping relationship specified by the responder device may not be applicable to the link and service conditions of the requester device, which will cause the negotiation to fail.

It can be seen that if the requester device and the responder device do not know the reason for the other party's mapping during the TID-to-link mapping negotiation process, they need to negotiate multiple times, resulting in low efficiency of the negotiation process; or if the negotiation fails, affect the efficiency of business execution.

In order to solve this technical problem, a first frame for the scenario of establishing a mapping relationship between service identifiers and links is proposed. The first frame can trigger the TID-to-link mapping negotiation process with the responder device. . The first frame includes remapping cause information, and after receiving the first frame, the responding end device can determine the remapping cause indicated by the requesting end device according to the remapping cause information, thereby improving negotiation efficiency.

The above-mentioned first frame may also be referred to as a TID-to-link mapping setup frame. It should be understood that the first frame may be aggregated or carried in the transmission data. The above-mentioned remapping reason information may also be called auxiliary information, which is mainly used to assist in determining TID-to-link mapping.

The requesting device that sends the first frame may be STA MLD or AP MLD. For STA MLD or AP MLD, the reasons for initiating TID-to-link mapping negotiation are the same or different. Therefore, before introducing the frame format of the first frame, we first introduce the reasons why the STA MLD and the AP MLD initiate the TID-to-link mapping negotiation.

For STA MLD, the following reasons can be included for initiating TID-to-link mapping negotiation:

Cause 1. The link fails or the link is unreachable.

For example, the STA MLD moves beyond the signal coverage of an AP, resulting in unreachable part of downlink data, or unreachable uplink and downlink data. Exemplarily, as shown in FIG. 2, if the STA MLD moves, causing the coverage of AP#1 to be exceeded, the data transmitted on link 1 is unreachable.

It should be noted that during the TID-to-link mapping negotiation process, link unreachability is a strong restriction. That is, because the TID-to-link mapping negotiation initiated by the link is unreachable, the responder device cannot map the service ID modification to the unreachable link, thereby avoiding the failure of the TID-to-link mapping negotiation.

Cause 2. Delay-sensitive services do not meet the QoS requirements.

For example, if the amount of data carried on the link is too large, so that the QoS of some delay-sensitive services carried on the link does not meet the QoS requirements, it is necessary to map the service identifiers of these delay-sensitive services to links that can guarantee better QoS. superior.

Reason 3, energy saving.

For example, if the STA MLD closes one or more links for the purpose of energy saving, it is necessary to remap the service identifiers corresponding to the links to be closed so that they are mapped to the new links.

It should be noted that if the reason for the STA MLD to initiate TID-to-link mapping negotiation is to save energy, the responder device should accept the TID-to-link mapping.

For AP MLD, the following reasons can be included for initiating TID-to-link mapping negotiation:

The first reason is load balancing.

For example, if the AP MLD determines that the load on the current link is unbalanced, it needs to adjust the services carried on the link, and remap some services on the over-congested link to other links with lighter load. In order to achieve load balancing and improve business efficiency.

The second reason is to reduce the transmission latency of sensitive services.

For example, AP MLD remaps non-sensitive services on link 1 to other links, thereby reducing the transmission latency of sensitive services on link 1.

The third reason is access control.

For example, the AP MLD manages the STAs accessed by each AP device attached to it according to the type or capability of the STA. Among them, the capabilities of the STA include the number of transmit and receive streams it supports, whether the links corresponding to the multi-link device support simultaneous transmit and receive (STR) data, and whether the links corresponding to the multi-link device support shared transmit and receive chains. (Tx/Rx chain), etc.

Based on the reason why the STA MLD and the AP MLD initiate the TID-to-link mapping negotiation, as shown in Table 5 below, the information that may be included in the first frame is exemplarily given. Among them, the elements of the maximum number of links allowed to open, the link quality report element, the QoS report element and the closed link set element correspond to the reasons for the above-mentioned TID-to-link mapping negotiation, are optional elements, and the information contained in the first frame can contain one or more of them. Optionally, an indication field is set in the first frame to indicate whether the first frame carries the element of the maximum number of links allowed to be opened, the link quality report element, the QoS report element and the closed link set element.

table 5

次序 order		信息information
11	类别字段(category)Category field (category)
22	多链路功能字段(multi-link action)Multi-link action field (multi-link action)
33	对话令牌(dialog token)dialog token
44	业务标识与链路映射元素(TID-to-link mapping element)TID-to-link mapping element
55	允许开启的最大链路数元素(max number of enabled links element)max number of enabled links element
66	链路质量报告元素(link quality report element)link quality report element
77	QoS报告元素(QoS report element)QoS report element
88	关闭链路集合元素(disable link set element)disable link set element
……	……

Optionally, FIG. 5 shows a schematic diagram of a frame format of the first frame. As shown in Figure 5, the first frame includes an element ID (element ID) field, a length (length) field, a control (control) field, a remapping reason (remapping reason) field, and the maximum number of links allowed to be opened (max number of enabled links) field, disable link set info field, link quality report information (link quality report info) field, QoS report information (QoS report info) field, service identifier and link mapping information (TID) -to-link mapping info) field, and remapping delay timer (remapping delay timer) field.

Optionally, the first frame includes remapping reason information, where the remapping reason information is used to indicate the remapping reason.

The remapping reason information is carried in one or more of the following fields: the maximum number of links allowed to be opened field, the closed link set information field, the link quality report information field, and the service quality QoS report information field. That is to say, the remapping reason information contained in the first frame can use one or more of the maximum number of links allowed to be opened field, the closed link set information field, the link quality report information field, and the QoS report information field. field to indicate.

In some embodiments, the maximum number of links allowed to be opened field is used to indicate the maximum number of links currently allowed to be opened by the device sending the first frame. For example, when the STA MLD needs to save energy, the maximum number of links allowed to be turned on can be indicated by the Maximum number of links allowed to be turned on field.

In some embodiments, the shutdown link set information field is used to indicate the link set that needs to be shut down. That is, it corresponds to remapping reasons such as link failure, link unreachability, access control, and load balancing.

In some embodiments, the link quality report information field is used to indicate the link quality of the link, and the link quality report information field carries link quality information.

Exemplarily, the link quality information includes, for example, one or more of the following: RSSI value, SINR value, indication information of whether the RSSI satisfies the first condition, and indication information of whether the SINR satisfies the second condition. The RSSI value may be an uplink RSSI value, or a downlink RSSI value, or may include an uplink RSSI value and a downlink RSSI value. The RSSI value may be the RSSI value measured by the STA according to the beacon frame, or the uplink RSSI value may be determined according to the difference between the transmission power of the beacon frame sent by the AP and the transmission power of the STA. The first condition is used to measure whether the link is reachable. For example, if the RSSI satisfies the first condition, the link is reachable, and the corresponding indication information indicates that the link is reachable. For another example, if the RSSI does not satisfy the first condition, the link is unreachable, and the corresponding indication information indicates that the link is unreachable. The SINR value may be an uplink SINR value, or a downlink SINR value, or may include an uplink SINR value and a downlink SINR value. The second condition is used to measure whether the link is reachable. For example, if the SINR satisfies the second condition, the link is reachable, and the corresponding indication information indicates that the link is reachable. For another example, if the SINR does not satisfy the second condition, the link is unreachable, and the corresponding indication information is indicating that the link is unreachable.

In some embodiments, the QoS report information field is used to indicate the quality of service of the corresponding service identifier. The QoS report information field carries service quality information.

Exemplarily, the service quality information includes, for example, a QoS value, or information indicating whether the QoS satisfies the third condition. The QoS value includes, for example, an average packet waiting delay, a delay jitter, an average rate, and the like. The second condition may be whether the QoS requirement is met. For example, if the QoS satisfies the second condition, the QoS satisfies the requirement, and the corresponding indication information indicates that the service identifier satisfies the QoS requirement. For another example, if the QoS does not meet the second condition, then the QoS does not meet the requirement, and the corresponding indication information is to indicate that the service identifier does not meet the QoS requirement.

Optionally, the first frame includes first indication information, where the first indication information is used to indicate whether the field carrying the remapping reason information appears in the first frame. The first indication information may be carried in the control field, or in the remapping cause field, or in the control field and the remapping cause field. Three indication manners in which the first indication information is carried in different fields are respectively introduced below.

Manner 1: The first indication information is carried in the control field.

Exemplarily, as shown in FIG. 5 , the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield. Wherein, the first subfield may be the current maximum number of enabled links present (max number of enabled links present) subfield, and the first subfield occupies 1 bit, which is used to indicate whether the field of the maximum number of enabled links present appears in the in the first frame. The second subfield may be the currently closed link set information (disable link set info present) subfield, the second subfield occupies 1 bit, and the first field and/or the second field is used to indicate whether the disabled link set information field is appears in the first frame. The third subfield may be a current link quality information (link quality info present) subfield, and the third subfield occupies 1 bit and is used to indicate whether the link quality report information field appears in the first frame. The fourth subfield may be a current QoS information (QoS info present) subfield, and the fourth subfield occupies 1 bit and is used to indicate whether the QoS report information field appears in the first frame.

For example, the first field is used to indicate the maximum number of links allowed to be opened, and to indicate the set of links that need to be shut down. For another example, the first field and the second field are used to indicate the set of links that need to be closed.

In this way, the remapping reason information contained in the first frame is indicated by the first subfield, the second subfield, the third subfield and the fourth subfield. According to the instruction, the responder device can obtain the remapping reason in the corresponding field to realize the rapid negotiation of TID-to-link mapping.

In another possible design, when the information indicating the maximum number of links allowed to be turned on needs to occupy a small number of bits, the field of the maximum number of links allowed to be turned on can be used as a subfield of the control field, directly in the control field The maximum number of links allowed to be opened subfield in indicates the maximum number of links allowed to be opened. For example, the maximum number of links allowed to be enabled subfield occupies 4 bits. Correspondingly, the control field does not need to contain a subfield of the maximum number of links currently allowed to be opened.

In some embodiments, as shown in FIG. 5 , the control field further includes other subfields, such as a service identification mapping request (TID mapping request) subfield, a service identification mapping command (TID mapping command) subfield, a service identification mapping mode (TID mapping mode) subfield, and reserved subfield.

The service identifier mapping request subfield occupies 1 bit, and is used to indicate whether the device sending the first frame is the requester device or the responder device. For example, when the value of the service identifier mapping request subfield is 1, it is used to indicate that the device currently sending the first frame is the requester device. For another example, when the value of the service identifier mapping request subfield is 0, it is used to indicate that the device currently sending the first frame is the responder device.

The service identifier mapping command subfield occupies 3 bits and is used to indicate the type of TID-to-link mapping negotiation. Referring to Table 6 below, when the service identifier mapping command subfield takes different values, as different site devices, the corresponding commands have different meanings. For example, the device sending the first frame is the requester device, and when the value of the service ID mapping command subfield is 0, it is used to indicate the request for the TID-to-link mapping parameter, and the first frame does not carry the TID-to-link mapping parameter . For another example, the device sending the first frame is the responder device, and when the value of the service identifier mapping command subfield is 4, it is used to indicate that the first frame carries the replaced TID-to-link mapping parameter. Among them, the TID-to-link mapping parameter includes the mapping relationship between the service identifier and the link.

Table 6

The service identifier mapping mode subfield occupies 1 bit and is used to indicate the remapping mode, and the remapping mode includes an immediate remapping mode or a delayed remapping mode. The immediate remapping mode means that after the negotiation of the mapping relationship between the service identifier and the link is successful, remapping is performed immediately according to the negotiated TID-to-link mapping. Delayed remapping mode means that after the negotiation of the mapping relationship between the service ID and the link is successful, remapping is performed according to the negotiated TID-to-link mapping after waiting for a period of time. Specifically, for some devices with weak capabilities, it may not be possible to immediately move a protocol data unit (MAC protocol data unit MAC, MPDU) on one link to another link for transmission, that is, remapping cannot be performed immediately. Therefore, a preset waiting time is required. Correspondingly, in the first frame, the waiting time can also be indicated by the remapping delay timer field, so as to successfully complete the remapping.

Manner 2: The first indication information is carried in the remapping reason field.

The first value of the remapping reason field is used to indicate whether the field of the maximum number of links allowed to be opened appears in the first frame. The first value and/or the second value of the remapping reason field is used to indicate whether the closed link set information field appears in the first frame. The third value of the remapping reason field is used to indicate whether the link quality report information field appears in the first frame. The fourth value of the remapping reason field is used to indicate whether the QoS report information field appears in the first frame.

That is, the remapping reason field can indicate whether the first frame includes the maximum number of links allowed to be opened field, and/or the closed link set information field, and/or the link quality report information field, and/or the QoS report information field.

Optionally, the remapping reason field can also be used to indicate the remapping reason. As shown in Table 7 below, the remapping reasons corresponding to the values of the partial remapping reason fields are exemplarily shown. It can be understood that other remapping reasons may also be included, which will not be repeated here.

Table 7

重映射原因字段取值Remap reason field value	重映射原因Reason for remapping
00	链路失效或者链路不可达Link failure or link unreachable
11	时延敏感类业务不满足QoS要求Delay-sensitive services do not meet QoS requirements
22	节能energy saving
33	负载均衡load balancing
44	减少敏感类业务的传输等待时延Reduce the transmission latency of sensitive services
55	接入控制access control

Manner 3: The first indication information is carried in the control field and the remapping reason field.

Wherein, as described in the first manner above, the control field includes a first subfield, a second subfield, a third subfield and a fourth field. The first subfield and the first value of the remapping reason field are used to indicate whether the field of the maximum number of links allowed to be opened appears in the first frame. The first subfield, the second field, the first value of the remapping cause field, and one or more of the second values of the remapping cause field are used to indicate whether the closed link set information field appears in the first subfield. in one frame. The third subfield and the third value of the remapping reason field are used to indicate whether the link quality report information field appears in the first frame. The fourth subfield and the fourth value of the remapping reason field are used to indicate whether the QoS report information field appears in the first frame.

The above-mentioned double confirmation through the first subfield, the second subfield, the third subfield, the fourth subfield and the indication of the remapping reason field, and then determine whether the first frame contains the maximum number of links allowed to open field, And/or close the link set information field, and/or the link quality report information field, and/or the QoS report information field, so as to improve the transmission accuracy of the remapping reason information. It can be understood that the effective remapping cause can be transmitted only when the first indication information carried in the control field and the remapping cause field does not conflict, that is, the indicated remapping cause does not conflict.

In this way, by any one of the above three methods, the remapping cause is sent to the responder device, so that the responder device can quickly identify the remapping cause and complete the TID-to-link mapping negotiation.

Optionally, the first frame may also carry service identifier mapping information, where the service identifier mapping information is based on a remapping reason and is used to indicate the mapping relationship between the service identifier and the link. Referring to Table 6 above, according to the indication of the service identifier mapping command subfield, it is determined that the TID-to-link mapping parameter needs to be provided, and the first frame carries the service identifier mapping information.

In some embodiments, the service identifier mapping information is carried in the service identifier and link mapping information field, and the service identifier and link mapping information field indicates the mapping relationship between the service identifier and the link in at least the following six ways.

Mode 1: The service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the correspondence between the service identifier and the bitmap of the link.

Exemplarily, the number of bits of the bitmap of the link is P times the number of links, and P is a positive integer. Wherein, a bit value of 1 indicates that the corresponding relationship includes a corresponding link; a bit value of 0 indicates that the corresponding relationship does not include a corresponding link. Assume that the number of links is 3, namely link 1, link 2 and link 3. P=1, the number of bits is 3. For example, if the bitmap is 001, it means link 3. For another example, if the bitmap is 101, it means link 1 and link 3.

Furthermore, by establishing the corresponding relationship between the service identifier and the bitmap of the link, the mapping relationship between the service identifier and the link is indicated. For example, if the service identifier and link mapping information field indicates that TID3 has a corresponding relationship with the bitmap 011 of the link, it means that TID3 is mapped to link 2 and link 3.

Mode 2: The service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the link identifier and the bitmap of the service identifier.

Exemplarily, the number of bits of the bitmap of the service identifier is Q times the number of TIDs, and Q is a positive integer. Wherein, a bit value of 1 indicates that the corresponding relationship contains a corresponding service identifier; a bit value of 0 indicates that the corresponding relationship does not contain a corresponding service identifier. Assume that the number of TIDs is 8, which are TID0-TID7 respectively. Q=1, the number of bits is 8. For example, if the bitmap is 10000000, it means TID0. For another example, if the bitmap is 00011000, it means TID3 and link TID4.

Furthermore, by establishing the corresponding relationship between the link identifier and the bitmap of the service identifier, the mapping relationship between the service identifier and the link is indicated. For example, if the service identifier and link mapping information field indicates that link 1 has a corresponding relationship with the bitmap 10000000 of the service identifier, it means that TID0 is mapped to link 1.

Mode 3. The service identifier and link mapping information field includes a fifth subfield, and the fifth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the service identifier and the bitmap of the link. Relationship, indicating the mapping relationship between service identifiers and links. The sixth value of the fifth subfield is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the service identifier and the link mapping information field using the link identifier and the bitmap of the service identifier.

Exemplarily, FIG. 6 shows schematic diagram 1 of the frame structure of the service identifier and link mapping information field. As shown in Figure 6, the service identification and link mapping information fields include an element ID field, a length (length) field, a control (control) field, a service identification or a bitmap of TIDs/links ) field. Wherein, as shown in FIG. 6 , the combination of the repetition control field and the service identifier or the bitmap field of the link is used to indicate one or more sets of mapping relationships. For the specific mapping relationship indication method, please refer to the following example description.

Wherein, the control field includes a manner flag subfield, which is used to indicate the combination mode for determining the corresponding relationship. That is, the fifth subfield is the marking mode subfield.

Optionally, the marking mode subfield occupies 1 bit, which is used to indicate that the control field includes a service identifier (TID) subfield or a link identifier (link ID) subfield.

In an example, as shown in FIG. 6 , when the value of the marking mode subfield is 0, the control field includes a service identification subfield, which is used to indicate the TID. Correspondingly, the service identifier or the bitmap field of the link is used to indicate the bitmap of the link. That is, the service identifier and link mapping information field indicates the mapping relationship between the service identifier and the link by using the corresponding relationship between the service identifier and the bitmap of the link.

In another example, as shown in FIG. 6 , when the marking mode subfield takes a value of 1, the control field includes a link identification subfield, which is used to indicate the link identification. Correspondingly, the bitmap field of the service identifier or link is used to indicate the bitmap of the service identifier. That is, the service ID and link mapping information field indicates the mapping relationship between the service ID and the link by using the corresponding relationship between the link ID and the bitmap of the service ID.

Optionally, as shown in FIG. 6 , the control field further includes a service identification direction (direction of TID) subfield, which is used to indicate the direction of the service identification. For example, if the service identification direction subfield occupies 1 bit, it is used to indicate whether the TID is unidirectional or bidirectional. The direction of the one-way indication is the same as the TID direction corresponding to the device sending the first frame. Bidirectional includes the upstream direction and the downstream direction. For another example, if the service identification direction subfield occupies 2 bits, it is used to indicate whether the TID is an uplink direction, a downlink direction or bidirectional. For example, 10 indicates the upstream direction, 01 indicates the downstream direction, 11 indicates the bidirectional direction, and 00 is the reserved value.

Exemplarily, according to the service identification direction subfield, it is determined that the service identification direction is the downlink direction, indicating that the current mapping relationship is suitable for the downlink transmission process.

Mode 4. The service identifier and link mapping information field includes a fifth subfield, and the seventh value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the service identifier and the bitmap of the link. Relationship, indicating the mapping relationship between service identifiers and links. The eighth value of the fifth subfield is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the service identifier and the link mapping information field using the link identifier and the bitmap of the service identifier. The ninth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the bitmap of the link and the bitmap of the service identifier to indicate the mapping relationship between the service identifier and the link. .

Optionally, FIG. 7 shows schematic diagram 2 of the frame structure of the service identifier and link mapping information field. As shown in Figure 7, the control field includes a marking mode subfield, occupying 2 bits, and is used to indicate that the control field includes a service identification (TID) subfield, a link identification (link ID) subfield, and the bits of the service identification. The bitmap of TIDs subfield, or the bitmap of links subfield of the link.

In an example, as shown in FIG. 7 , when the value of the marking mode subfield is 00, the control field includes a service identification subfield, which is used to indicate the TID. Correspondingly, the service identifier or the bitmap field of the link is used to indicate the bitmap of the link. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the service identifier and the bitmap of the link.

In another example, as shown in FIG. 7 , when the marking mode subfield takes a value of 01, the control field includes a link identification subfield, which is used to indicate the link identification. Correspondingly, the bitmap field of the service identifier or link is used to indicate the bitmap of the service identifier. That is, the service ID and link mapping information field is used to indicate the mapping relationship between the service ID and the link by using the corresponding relationship between the link ID and the bitmap of the service ID.

In another example, as shown in FIG. 7 , when the value of the marking mode subfield is 10, the control field includes the bitmap subfield of the service identifier, which is used to indicate the bitmap of the service identifier. Correspondingly, the service identifier or the bitmap field of the link is used to indicate the bitmap of the link. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the bitmap of the service identifier and the bitmap of the link.

In another example, as shown in FIG. 7 , when the value of the marking mode subfield is 11, the control field includes the bitmap subfield of the link, which is used to indicate the bitmap of the link. Correspondingly, the bitmap field of the service identifier or link is used to indicate the bitmap of the service identifier. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the bitmap of the link and the bitmap of the service identifier.

It should be noted that, for the description of other fields or subfields of the frame structure shown in FIG. 7 , reference may be made to the foregoing mode 3, and the relevant description of the frame structure shown in FIG. 6 will not be repeated here.

Mode 5. The service identifier and link mapping information field includes a fifth subfield, and the tenth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field using the service identifier and the bitmap of the link. Relationship, indicating the mapping relationship between service identifiers and links. The eleventh value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the correspondence between the bitmap of the service identifier and the bitmap of the link to indicate the mapping between the service identifier and the link. relation.

Optionally, FIG. 8 shows schematic diagram 3 of the frame structure of the service identifier and link mapping information field. As shown in Figure 8, the control field includes a marking mode subfield, occupying 1 bit, which is used to indicate that the control field includes a service identifier (TID) subfield, or a service identifier or a bitmap of the link (bitmap of TIDs/ links) subfield.

In an example, as shown in FIG. 8 , when the marking mode subfield takes a value of 0, the control field includes a service identification subfield, which is used to indicate the TID. Correspondingly, the service identifier or the bitmap field of the link is used to indicate the bitmap of the link. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the service identifier and the bitmap of the link.

In another example, as shown in FIG. 8 , when the marking mode subfield is 1, the control field includes a service identifier or a link bitmap subfield, which is used to indicate a service identifier or a link bitmap. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the bitmap of the link and the bitmap of the service identifier. For example, if the service identifier or link bitmap subfield is used to indicate the link bitmap, the corresponding service identifier or link bitmap field is used to indicate the service identifier bitmap. For another example, if the service identifier or the bitmap subfield of the link is used to indicate the bitmap of the service identifier, the corresponding service identifier or the bitmap field of the link is used to indicate the bitmap of the link.

It should be noted that, for the description of other fields or subfields of the frame structure shown in FIG. 8 , reference may be made to the foregoing mode 3, and the relevant description of the frame structure shown in FIG. 6 will not be repeated here.

Mode 6. The service identification and link mapping information field includes a fifth subfield, and the twelfth value of the fifth subfield is used to indicate that the service identification and link mapping information field utilizes the bitmap of the link identification and the service identification The corresponding relationship indicates the mapping relationship between service identifiers and links. The thirteenth value of the fifth subfield is used to indicate the correspondence between the service identifier and the link mapping information field by using the bitmap of the link and the bitmap of the service identifier to indicate the mapping between the service identifier and the link. relation.

Optionally, FIG. 9 shows schematic diagram 4 of the frame structure of the service identifier and link mapping information field. As shown in Figure 9, the control field includes a marking mode subfield, occupying 1 bit, which is used to indicate that the control field includes a link ID (link ID) subfield, or a service ID or a bitmap of the link (bitmap of TIDs/links) subfield.

In an example, as shown in FIG. 9 , when the marking mode subfield takes a value of 0, the control field includes a link identification subfield, which is used to indicate the link identification. Correspondingly, the bitmap field of the service identifier or link is used to indicate the bitmap of the service identifier. That is, the service ID and link mapping information field is used to indicate the mapping relationship between the service ID and the link by using the corresponding relationship between the link ID and the bitmap of the service ID.

In yet another example, as shown in FIG. 9 , when the marking mode subfield takes a value of 1, the control field includes a service identifier or a link bitmap subfield, which is used to indicate a service identifier or a link bitmap. That is, the service identifier and link mapping information field is used to indicate the mapping relationship between the service identifier and the link by using the corresponding relationship between the bitmap of the link and the bitmap of the service identifier. For example, if the service identifier or link bitmap subfield is used to indicate the link bitmap, the corresponding service identifier or link bitmap field is used to indicate the service identifier bitmap. For another example, if the service identifier or the bitmap subfield of the link is used to indicate the bitmap of the service identifier, the corresponding service identifier or the bitmap field of the link is used to indicate the bitmap of the link.

It should be noted that, for the description of other fields or subfields of the frame structure shown in FIG. 9 , reference may be made to the above-mentioned mode 3, and the relevant description of the frame structure shown in FIG. 6 will not be repeated here.

Optionally, the service identifier and link mapping information field may carry all or part of the mapping information between the service identifier and the link. If the service identifier and link mapping information field carries the mapping information of part of the service identifier or the mapping information of part of the link, other mapping information not carried by default remains unchanged.

Exemplarily, the link includes link 1-link 5, and the service identifier and link mapping information field indicates the mapping relationship between link 1-link 4 and the service identifier respectively, then link 5 keeps the original mapping relationship unchanged. Change.

Optionally, in the link between the STA MLD and the AP MLD, a link is preset as an anchor link, and there is a mapping relationship between any TID and the anchor link. That is, any TID can be transmitted on the anchor link. The mapping relationship between the TID and the anchor link may or may not be indicated in the service identifier and link mapping information field. If not indicated, other fields can be used to indicate the anchor link information, and the STA MLD and the AP MLD establish a mapping relationship between the TID and the anchor link according to the anchor link information.

The above is an introduction to the first frame provided by the embodiment of the present application, which is uniformly described here, and will not be repeated below.

FIG. 10 is a first schematic flowchart of a data transmission method provided by an embodiment of the present application. As shown in Figure 10, the method includes the following steps:

S101. A first device generates a first frame.

Wherein, the first device is a requester device, which may be a STA MLD or an AP MLD.

It can be understood that, if the first device initially requests to establish the mapping relationship between the service identifier and the link, the remapping reason indicates the mapping reason, that is, the remapping reason information can also be described as the mapping reason information.

Optionally, the information carried in the first frame includes one of the following situations:

Case 1. The first frame contains the first remapping reason information.

In some embodiments, as shown in Table 6 above, the first device requests the establishment of the mapping relationship between the service identifier and the link by requesting the TID-to-link mapping parameter, and then the remapping reason needs to be sent to the first device. Second device, to avoid that the TID-to-link mapping parameter provided by the second device is not applicable to the service identifier and link situation of the first device.

Scenario 2: The first frame includes first remapping reason information and first service identifier mapping information.

The first service identifier mapping information is based on the first remapping reason, and the first service identifier mapping information is used to indicate the first mapping relationship between the service identifier and the link.

In some embodiments, as shown in Table 6 above, the request method for the first device to request to establish the mapping relationship between the service identifier and the link is to suggest a TID-to-link mapping parameter, or the request method is to require a TID-to-link mapping parameter. For the link mapping parameter, you need to provide the TID-to-link mapping parameter, that is, provide the first service identifier mapping information.

It should be noted that, for other information contained in the first frame, refer to the above description of the frame format of the first frame, and details are not repeated here.

S102. The first device sends the first frame to the second device. Correspondingly, the second device receives the first frame sent by the first device.

S103. The second device parses the first frame.

Optionally, after receiving the first frame and parsing the first frame, the second device obtains the remapping reason information, and further determines the reason why the first device requests to establish the mapping relationship between the service identifier and the link.

Further, the subsequent second device can establish a mapping relationship between the service identifier and the link according to the reason, thereby avoiding the established mapping relationship that does not meet the requirements of the first device, resulting in failure of TID-to-link mapping negotiation, and improving TID-to-link mapping. to-link mapping negotiation efficiency.

Optionally, after the second device receives the first frame, the second device may use the embodiment shown in FIG. 11 to feed back the second frame. FIG. 11 is a second flowchart of a data transmission method provided by an embodiment of the present application. As shown in Figure 11, the method includes the following steps:

S201. The second device generates a second frame.

For the frame format of the second frame, reference may be made to the above description of the frame format of the first frame.

Optionally, for the above-mentioned situation 1 of the information carried in the first frame, the information carried in the second frame includes one of the following situations:

Scenario 1-1: The second frame carries the second service identifier mapping information.

The second service identifier mapping information is based on the first remapping reason, and the second service identifier mapping information is used to indicate the second mapping relationship between the service identifier and the link.

Optionally, in the scenarios described in Scenario 1 and Scenario 1-1, the first frame may be described as a service identifier and link mapping request frame (TID-to-link mapping request frame), and correspondingly, the second frame may be described as a TID-to-link mapping request frame. Described as service identification and link mapping response frame (TID-to-link mapping response frame).

Scenario 1-2: The second frame carries the second service identifier mapping information and the second remapping reason information.

Specifically, after determining the second service identifier mapping information according to the first remapping cause, the second device may also determine the second remapping cause information according to its own service identifier and link conditions. Then, after the first device receives the second frame, if it is necessary to modify or replace the TID-to-link mapping parameter, it can determine the TID-to-link mapping parameter according to the second remapping reason information to improve the negotiation efficiency. Or, the first device can re-confirm the TID-to-link mapping parameter according to the first remapping reason information and the second remapping reason information, so as to avoid an error in the mapping relationship.

Optionally, in the scenarios described in Scenario 1 and Scenario 1-2, the first frame may be described as a service identifier and link mapping query frame (TID-to-link mapping query frame), and correspondingly, the second frame may be described as a TID-to-link mapping query frame. Described as service identification and link mapping request frame (TID-to-link mapping request frame). Then, after receiving the second frame, the first device may also send a service identifier and a link mapping response frame (TID-to-link mapping response frame) to the second device.

Optionally, for the above-mentioned situation 2 of the information carried in the first frame, the information carried in the second frame includes one of the following situations:

Scenario 2-1. The second frame carries the second service identifier mapping information and/or the status code.

The second service identifier mapping information is modified or replaced service identifier mapping information. The status code is used to indicate whether the mapping relationship between the service identifier and the link is successfully established. Optionally, if the establishment of the mapping relationship between the service identifier and the link fails, the status code carries the reason for the establishment failure.

In some embodiments, the second frame carries the second service identifier mapping information and the status code. As shown in Table 6 above, the response method of the second device is to replace the TID-to-link mapping parameter, or specify the TID-to-link mapping parameter. The second frame carries the modified or replaced service identification mapping information, and indicates the failure reason. Further, subsequently, the first device can determine whether to accept the second service identifier mapping information according to the status code.

In other embodiments, the second frame carries the second service identifier mapping information. The second service identifier mapping information may be modified or replaced service identifier mapping information. Alternatively, the second service identifier mapping information may be the same as the first service identifier mapping information, and the first device subsequently confirms the service identifier mapping information again.

In yet other embodiments, the status code is carried in the second frame. The second device uses the status code as an acknowledgement indication, including a positive acknowledgement (ACK) or a negative acknowledgement (NACK). For example, the status code is used to indicate that the TID-to-link mapping protocol has been established. For another example, the status code is used to indicate that the establishment of the TID-to-link mapping protocol fails. For another example, the status code is used to indicate refusal to establish the TID-to-link mapping protocol.

Scenario 2-2: The second frame carries the second service identifier mapping information and/or status code, and the second remapping reason information.

Specifically, for the role of the second remapping cause information in the current scenario, reference may be made to the relevant descriptions in Scenario 1-2, which will not be repeated here.

Optionally, in Scenario 2 and Scenario 2-1, or in the scenarios described in Scenario 2 and Scenario 2-2, the first frame may be described as a TID-to-link mapping setup frame (TID-to-link mapping setup). frame), correspondingly, the second frame can be described as a service identification and link mapping setup frame (TID-to-link mapping setup frame).

It should be noted that, for other information contained in the second frame, refer to the above description of the frame format of the first frame, and details are not repeated here.

S202. The second device sends a second frame to the first device. Correspondingly, the first device receives the second frame sent by the second device.

S203. The first device parses the second frame.

Based on the above solution, on the one hand, based on the scenarios shown in the above scenario 1, scenario 1-1, and scenario 1-2, the second device can determine the mapping relationship between the service identifier and the link according to the remapping reason and its own situation. Then, the mapping relationship will not cause the first device to fail to complete the establishment of the mapping relationship, thereby avoiding negotiation failure and improving negotiation efficiency. On the other hand, based on the scenarios shown in Scenario 2, Scenario 2-1, and Scenario 2-2, the second device can perform the mapping relationship between the received service identifier and the link according to the reason for remapping and its own situation. modify or replace. Likewise, the modified or replaced mapping relationship will not cause the first device to fail to complete the establishment of the mapping relationship, thereby avoiding negotiation failure and improving negotiation efficiency.

In this way, the first device and the second device can determine the mapping relationship between the service identifier and the link through a limited number of negotiations, which improves the negotiation efficiency.

Optionally, after the first device receives the second frame, the first device may use the embodiment shown in FIG. 12 to feed back the third frame. FIG. 12 is a third flowchart of a data transmission method provided by an embodiment of the present application. As shown in Figure 12, the method includes the following steps:

S301. The first device generates a third frame.

S302. The first device sends a third frame to the second device. Correspondingly, the second device receives the third frame sent by the first device.

Wherein, the third frame is used to indicate a positive response or a negative response to the second frame. That is, it indicates whether the first device accepts the second mapping relationship, or indicates whether the second mapping relationship is successfully established.

FIG. 13 shows a schematic structural diagram of the AP MLD and the STA MLD participating in the communication. The 802.11 standard focuses on the 802.11 physical layer (PHY) and MAC layer parts in AP MLD and STA MLD.

As shown in (a) of Figure 13, the multiple APs included in the AP MLD are independent of each other at the low MAC (low MAC) layer and the PHY layer, and are also independent of each other at the high MAC (high MAC) layer. The multiple STAs included in the STA MLD are independent of each other at the low MAC layer and PHY layer, and are also independent of each other at the high MAC layer.

As shown in (b) of Figure 13, multiple APs included in the AP MLD are independent of each other in the low MAC layer and the PHY layer, and share the high MAC layer. Multiple STAs included in the STA MLD are independent of each other in the low MAC layer and the PHY layer, and share the high MAC layer.

Of course, the STA MLD may adopt a structure in which the high MAC layers are independent of each other, while the AP MLD adopts a structure shared by the high MAC layers. Alternatively, the STA MLD adopts a structure in which the upper MAC layers are shared, and the AP MLD adopts a structure in which the higher MAC layers are independent of each other. Exemplarily, both the high MAC layer and the low MAC layer may be implemented by a processor in a system-on-a-chip of a multi-link device, and may also be implemented by different processing modules in a system-on-a-chip respectively.

It can be seen that, in the multi-link device, the low MAC layer is independent, so that the low MAC layer of each STA or AP corresponds to its own link. To transmit the management frame on the link is to send the management frame to the lower MAC layer corresponding to the link. In the prior art, if a certain link fails or is unreachable, the management frame that needs to be sent to the lower MAC layer corresponding to the link will fail to be sent.

Based on this, an embodiment of the present application provides a data transmission method. FIG. 14 is a fourth flowchart of a data transmission method provided by an embodiment of the present application. As shown in Figure 14, the method includes the following steps:

S401. On the first link, the first device sends a management frame and a target link identifier on the failed second link to the second device. Correspondingly, the second device receives the management frame and the target link identifier sent by the first device on the first link.

The management frame is a unicast management frame sent by the first device to a module in the second device, and the target link identifier is used to point to the module. Specifically, the target link identifier is used to instruct the receiving end multi-link device to forward the received management frame to the module corresponding to the target link identifier. The module refers to a certain device in the MLD device. For example, an AP in the AP MLD. Another example is a certain STA in the STA MLD.

Optionally, the first device also sends the reporting link identifier on the first link. The link corresponding to the reporting link identifier is the first link for sending the management frame, and the reporting link identifier is used to instruct the receiving end MLD to send a response frame on the first link corresponding to the reporting link identifier.

In some embodiments, the management frame includes a reporting link identifier (reporting link ID) and a destination link identifier (destination link ID). The reporting link identifier includes a reporting link identifier, which is used to indicate the identifier of the link that actually sends the management frame. The target link identifier includes the target link identifier, which is used to indicate the identifier of the final link to be forwarded to.

Exemplarily, the target link identifier and the reporting link identifier are carried in an aggregated control (aggregated control, A-control) field of the MAC frame.

In other embodiments, a new functional frame is defined, and the management frame, the target link identifier and the reporting link identifier are carried in the frame body of the functional frame. Further, the management frame, the target link identifier and the reporting link identifier are carried in the newly defined function frame for transparent transmission.

Exemplarily, as shown in Table 8 below, part of the information carried in the newly defined function frame is shown. The target link identifier and the reporting link identifier are carried in the X element.

Table 8

次序 order		信息information
11	类别字段(category)Category field (category)
22	功能字段(action)Function field (action)
33	透传的管理帧Transparent management frame
44	X元素(element)X element

In addition, FIG. 15 shows a schematic diagram of a frame format of a transparently transmitted management frame. As shown in Figure 15, the transparently transmitted management frame includes a management MPDU length (MMPDU length) field, a management MPDU frame control (MMPDU frame control) field, and a management MPDU frame body (MMPDU frame body) field.

S402. The second device determines to forward the received management frame to the module corresponding to the target link identifier according to the target link identifier.

Exemplarily, as shown in FIG. 2 , the first device is an AP MLD, the second device is a STA MLD, and the AP MLD needs to use link 2 to send a management frame to STA#2. It is assumed that the reporting link identifier corresponds to link 1, and the target link identifier corresponds to link 2. At this time, if link 2 fails, the AP MLD uses link 1 to send a management frame to STA#1. After receiving the management frame, STA#1 determines that the target link identifier corresponds to link 2, that is, corresponds to STA#2, and forwards the received management frame to STA#2. Optionally, STA#1 may also send a response frame on the link 1 corresponding to the reporting link identifier according to the reporting link identifier, to notify the AP whether the MLD management frame is sent successfully. The response frame includes an acknowledgment or a negative acknowledgment.

In this way, by using the target link identifier, in the case of failure or unreachability of some links, the management frame that should be sent can also be sent to the lower MAC layer corresponding to the failed or unreachable link, so as to avoid the failure of sending management frames. .

It should be understood that the embodiment shown in Fig. 14 may be combined with the embodiment shown in Fig. 10, Fig. 11 or Fig. 12 in the foregoing description.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of the data transmission apparatus (eg, the first device and the second device). It can be understood that, in order to realize the above-mentioned functions, the data transmission apparatus includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the device may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. The division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. The following is an example of dividing each function module corresponding to each function to illustrate:

FIG. 16 is a schematic structural diagram of a data transmission apparatus provided by an embodiment of the present application. As shown in FIG. 16 , the data transmission apparatus 1600 includes: a processing module 1601 and a communication module 1602 .

In a possible design, when the data transmission apparatus 1600 is used as the first device, the processing module 1601 is used to support the data transmission apparatus 1600 to perform step S101 in FIG. 10 , and/or to support the data transmission apparatus 1600 to perform the step S101 in FIG. step S301. The communication module 1602 is used for supporting the data transmission apparatus 1600 to perform step S102 in FIG. 10 , and/or for supporting the data transmission apparatus 1600 to perform step S202 in FIG. 11 , and/or for supporting the data transmission apparatus 1600 to perform the step S202 in FIG. 12 . , and/or the apparatus 1600 for supporting data transmission to perform step S401 in FIG. 14 .

In another possible design, when the data transmission apparatus 1600 is used as the second device, the processing module 1601 is used to support the data transmission apparatus 1600 to perform step S103 in FIG. 10 , and/or to support the data transmission apparatus 1600 to perform the diagram of Step S201 in 11, and/or the apparatus for supporting data transmission 1600 to perform step S402 in FIG. 14 . The communication module 1602 is used for supporting the data transmission apparatus 1600 to perform step S102 in FIG. 10 , and/or for supporting the data transmission apparatus 1600 to perform step S202 in FIG. 11 , and/or for supporting the data transmission apparatus 1600 to perform the step S202 in FIG. 12 . step S301.

Optionally, the communication module 1602 may include a receiving module and a sending module. Among them, the receiving module is used to receive data sent by other devices. The sending module is used to send data to other devices. The specific implementation manner of the communication module 1602 is not specifically limited in this embodiment of the present application.

Optionally, the data transmission apparatus 1600 shown in FIG. 16 may further include a storage module (not shown in FIG. 16 ), and the storage module stores programs or instructions. When the processing module 1601 executes the program or instruction, the data transmission apparatus 1600 shown in FIG. 16 can execute the data transmission method shown in FIG. 10 , FIG. 11 , FIG. 12 or FIG. 14 .

For the technical effect of the data transmission apparatus 1600 shown in FIG. 16 , reference may be made to the technical effect of the data transmission method shown in FIG. 10 , FIG. 11 , FIG. 12 or FIG. 14 , which will not be repeated here.

The processing modules involved in the data transmission apparatus 1600 shown in FIG. 16 may be implemented by processors or processor-related circuit components, and may be processors or processing units. The operations and/or functions of each module in the data transmission apparatus 1600 are respectively to implement the corresponding flow of the data transmission method shown in FIG. 10 , FIG. 11 , FIG. 12 or FIG.

FIG. 17 is a structural diagram of a possible product form of the data transmission device according to the embodiment of the present application.

As a possible product form, the data transmission apparatus described in this embodiment of the present application may be the above-mentioned first device, and the data transmission apparatus includes a processor 1701 and a transceiver 1702 . Optionally, the data transmission apparatus further includes a memory 1703 .

The processor 1701 is configured to support the data transmission apparatus to perform step S101 in FIG. 10 , and/or to support the data transmission apparatus to perform step S301 in FIG. 12 . The transceiver 1702 is configured to support the data transmission device to perform step S102 in FIG. 10 , and/or to support the data transmission device to perform step S202 in FIG. 11 , and/or to support the data transmission device to perform step S302 in FIG. 12 , and/or the apparatus for supporting data transmission to perform step S401 in FIG. 14 .

As another possible product form, the data transmission apparatus described in this embodiment of the present application may be the above-mentioned second device, and the data transmission apparatus includes a processor 1701 and a transceiver 1702 . Optionally, the data transmission apparatus further includes a memory 1703 .

The processor 1701 is configured to support the data transmission device to perform step S103 in FIG. 10 , and/or to support the data transmission device to perform step S201 in FIG. 11 , and/or to support the data transmission device to perform step S402 in FIG. 14 . The transceiver 1702 is used for supporting the data transmission device to perform step S102 in FIG. 10 , and/or for supporting the data transmission device to perform step S202 in FIG. 11 , and/or for supporting the data transmission device to perform step S301 in FIG. 12 .

As another possible product form, the data transmission device described in the embodiments of the present application may also be implemented by a chip. The chip includes: a processing circuit 1701 and a transceiver pin 1702 . Optionally, the chip may further include a memory 1703 .

The bus may include a path for transferring information between the components.

The above transceiver/transceiver pin 1702 is used to communicate with other devices. In this embodiment of the present application, the transceiver/transceiver pin may be a module, a circuit, a bus, an interface, a communication interface, or any other device capable of implementing a communication function, and is used to communicate with other devices. Optionally, the transceiver can be an independently set transmitter, and the transmitter can be used to send information to other devices, and the transceiver can also be an independently set receiver, used to receive information from other devices. The transceiver may also be a component that integrates the functions of sending and receiving information, and the specific implementation of the transceiver is not limited in this embodiment of the present application.

The above-described memory 1703 may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct rambus RAM (DR RAM) or other magnetic storage devices, or any other device that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer medium, but not limited to this. The memory 1703 may exist independently, or may be integrated with the processor 1701 .

As another possible product form, the data transmission apparatus described in the embodiments of the present application can also be implemented by using the following circuits or devices: one or more field programmable gate arrays (FPGA), programmable A programmable logic device (PLD), controller, state machine, gate logic, discrete hardware components, any other suitable circuit, or any combination of circuits capable of performing the various functions described throughout this application.

An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.

Optionally, the number of processors in the chip system may be one or more. The processor can be implemented by hardware or by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software codes stored in memory.

Optionally, there may also be one or more memories in the chip system. The memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. Exemplarily, the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips. The setting method of the processor is not particularly limited.

Exemplarily, the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller). controller unit, MCU), it can also be a programmable logic device (PLD) or other integrated chips.

Optionally, an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is made to perform the data transmission in the foregoing method embodiments. method.

Optionally, the embodiments of the present application further provide a computer program product including computer instructions, when the computer instructions are executed on the computer, the computer can execute the data transmission method in the foregoing method embodiments.

It should be understood that the computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server Or the data center transmits to another website site, computer, server or data center by wired (eg coaxial cable, optical fiber, digital subscriber line) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or data storage devices including one or more servers, data centers, etc. that can be integrated with the medium. The usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (e.g., solid state drives), and the like.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

It should be understood that the apparatuses and methods disclosed in the several embodiments provided in this application may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. . Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A data transmission method, characterized in that the method comprises:

generating a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate a remapping cause;

The first frame is sent.
The method according to claim 1, wherein the remapping reason information is carried in one or more of the following fields: the maximum number of links allowed to be opened field, the closed link set information field, the link quality report information field, the quality of service QoS report information field; wherein, the maximum number of links allowed to be opened subfield is used to indicate the maximum number of links allowed to be opened; the closed link set information field is used to indicate the link set that needs to be closed; The link quality report information field is used to indicate link quality information; the QoS report information field is used to indicate service quality information.
The method according to claim 2, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping cause information appears in the first frame frame; the first indication information is carried in a control field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield; wherein,

The first subfield is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

the first subfield and/or the second subfield is used for whether the indication of the shutdown link set information field appears in the first frame;

the third subfield is used to indicate whether the link quality report information field appears in the first frame;

The fourth subfield is used to indicate whether the QoS report information field is present in the first frame.
The method according to claim 2, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping cause information appears in the first frame frame; the first indication information is carried in the remapping cause field, wherein,

The first value of the remapping reason field is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

The first value and/or the second value of the remapping reason field is used to indicate whether the closed link set information field appears in the first frame;

The third value of the remapping reason field is used to indicate whether the link quality report information field appears in the first frame;

The fourth value of the remapping reason field is used to indicate whether the QoS report information field appears in the first frame.
The method according to claim 2, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping cause information appears in the first frame frame; the first indication information is carried in the control field and the remapping reason field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield; wherein,

The first value of the first subfield and the remapping reason field is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

One or more of the first subfield, the second subfield, the first value of the remapping cause field, and the second value of the remapping cause field are used to indicate the whether the closed link set information field is present in the first frame;

The third subfield and the third value of the remapping reason field are used to indicate whether the link quality report information field appears in the first frame;

The fourth subfield and the fourth value of the remapping reason field are used to indicate whether the QoS report information field appears in the first frame.
The method according to any one of claims 1-5, wherein the method further comprises:

Receive a second frame, where the second frame carries second service identifier mapping information, the second service identifier mapping information is based on the remapping reason, and the second service identifier mapping information is used to indicate the service identifier and the link. The second mapping relationship between the roads.
The method according to claim 6, wherein the second service identification mapping information is carried in a service identification and link mapping information field, and the service identification and link mapping information fields are used for using the service identification The corresponding relationship with the bitmap of the link indicates the second mapping relationship; or,

The service identifier and link mapping information field is used to indicate the second mapping relationship by using the corresponding relationship between the identifier of the link and the bitmap of the service identifier; or,

The service identifier and link mapping information field includes a fifth subfield, and the fifth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the sixth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field use the identifier of the link and the The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the seventh value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the eighth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the link identifier and the link mapping information field. The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; the ninth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the bits of the link The corresponding relationship between the map and the bitmap of the service identifier indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the tenth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the eleventh value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the bits of the service identifier The corresponding relationship between the map and the bitmap of the link indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the twelfth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the link identifier and all The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; the thirteenth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the link mapping information field. The corresponding relationship between the bitmap and the bitmap of the service identifier indicates the second mapping relationship.
The method according to claim 6 or 7, wherein the second service identifier mapping information further carries the direction of the second mapping relationship between the service identifier and the link.
The method according to any one of claims 6-8, wherein the method further comprises:

A third frame is sent, and the third frame is used to indicate an acknowledgment or a negative acknowledgment to the second frame.
The method according to any one of claims 1-9, wherein the first frame further includes first service identifier mapping information, and the first service identifier mapping information is based on the remapping reason, and the The first service identifier mapping information is used to indicate the first mapping relationship between the service identifier and the link.
The method according to claim 10, wherein the second frame further carries a status code, and the status code is used to indicate whether the mapping relationship between the service identifier and the link is successfully established.
The method according to claim 11, wherein if the establishment of the mapping relationship between the service identifier and the link fails, the status code carries the reason for the establishment failure.
The method according to any one of claims 1-12, wherein the first frame further carries a remapping mode, and the remapping mode includes an immediate remapping mode or a delayed remapping mode.
A data transmission method, characterized in that the method comprises:

receiving a first frame, where the first frame includes remapping cause information, and the remapping cause information is used to indicate a remapping cause;

Parse the first frame.
The method according to claim 14, wherein the remapping reason information is carried in one or more of the following fields: the maximum number of links allowed to be opened field, the closed link set information field, the link quality report information field, the quality of service QoS report information field; wherein, the maximum number of links allowed to be opened subfield is used to indicate the maximum number of links allowed to be opened; the closed link set information field is used to indicate the link set that needs to be closed; The link quality report information field is used to indicate link quality information; the QoS report information field is used to indicate service quality information.
The method according to claim 15, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping reason information appears in the first frame frame; the first indication information is carried in a control field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield; wherein,

The first subfield is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

The first subfield and/or the second subfield are used to indicate whether the closed link set information field appears in the first frame;

the third subfield is used to indicate whether the link quality report information field appears in the first frame;

The fourth subfield is used to indicate whether the QoS report information field is present in the first frame.
The method according to claim 15, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping reason information appears in the first frame frame; the first indication information is carried in the remapping cause field, wherein,

The first value of the remapping reason field is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

The first value and/or the second value of the remapping reason field is used to indicate whether the closed link set information field appears in the first frame;

The third value of the remapping reason field is used to indicate whether the link quality report information field appears in the first frame;

The fourth value of the remapping reason field is used to indicate whether the QoS report information field appears in the first frame.
The method according to claim 15, wherein the first frame includes first indication information, and the first indication information is used to indicate whether a field carrying the remapping reason information appears in the first frame frame; the first indication information is carried in the control field and the remapping reason field, and the control field includes a first subfield, a second subfield, a third subfield and a fourth subfield; wherein,

The first value of the first subfield and the remapping reason field is used to indicate whether the maximum number of links allowed to be opened field appears in the first frame;

One or more of the first subfield, the second subfield, the first value of the remapping cause field, and the second value of the remapping cause field are used to indicate the whether the closed link set information field is present in the first frame;

The third subfield and the third value of the remapping reason field are used to indicate whether the link quality report information field appears in the first frame;

The fourth subfield and the fourth value of the remapping reason field are used to indicate whether the QoS report information field appears in the first frame.
The method according to any one of claims 15-18, wherein the method further comprises:

A second frame is generated, and the second frame carries second service identifier mapping information, the second service identifier mapping information is based on the remapping reason, and the second service identifier mapping information is used to indicate that the service identifier is associated with the link. the second mapping relationship between the roads;

The second frame is sent.
The method according to claim 19, wherein the second service identification mapping information is carried in a service identification and link mapping information field, and the service identification and link mapping information fields are used for using the service identification The corresponding relationship with the bitmap of the link indicates the second mapping relationship; or,

The service identifier and link mapping information field is used to indicate the second mapping relationship by using the corresponding relationship between the identifier of the link and the bitmap of the service identifier; or,

The service identifier and link mapping information field includes a fifth subfield, and the fifth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the sixth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field use the identifier of the link and the The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the seventh value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the eighth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the link identifier and the link mapping information field. The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; the ninth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the bits of the link The corresponding relationship between the map and the bitmap of the service identifier indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the tenth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the service identifier and the link. The corresponding relationship of the bitmap of the road indicates the second mapping relationship; the eleventh value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the bits of the service identifier The corresponding relationship between the map and the bitmap of the link indicates the second mapping relationship; or,

The service identifier and link mapping information field includes a fifth subfield, and the twelfth value of the fifth subfield is used to indicate that the service identifier and link mapping information field uses the link identifier and all The corresponding relationship of the bitmap of the service identifier indicates the second mapping relationship; the thirteenth value of the fifth subfield is used to indicate that the service identifier and the link mapping information field utilize the link mapping information field. The corresponding relationship between the bitmap and the bitmap of the service identifier indicates the second mapping relationship.
The method according to claim 19 or 20, wherein the second service identifier mapping information further carries the direction of the second mapping relationship between the service identifier and the link.
The method according to any one of claims 19-21, wherein the method further comprises:

A third frame is received, the third frame being used to indicate an acknowledgment or a negative acknowledgment to the second frame.
The method according to any one of claims 15-22, wherein the first frame further includes first service identifier mapping information, and the first service identifier mapping information is based on the remapping reason, and the The first service identifier mapping information is used to indicate the first mapping relationship between the service identifier and the link.
The method according to claim 23, wherein the second frame further carries a status code, and the status code is used to indicate whether the mapping relationship between the service identifier and the link is successfully established.
The method according to claim 24, wherein if the establishment of the mapping relationship between the service identifier and the link fails, the status code carries the reason for the establishment failure.
The method according to any one of claims 15-25, wherein the first frame further carries a remapping mode, and the remapping mode includes an immediate remapping mode or a delayed remapping mode.
A data transmission method, characterized in that the method comprises:

Send the management frame on the failed second link and the target link identifier on the first link, where the target link identifier is used to instruct the receiving end multi-link device MLD to forward the received management frame to the The target link identifies the corresponding module.
The method of claim 27, wherein the method further comprises:

A reporting link identifier is sent on the first link, where the reporting link identifier is used to instruct the receiving end MLD to send a response frame on the first link corresponding to the reporting link identifier.
The method according to claim 27 or 28, wherein the target link identifier and the reporting link identifier are carried in the aggregation control A-control field of the MAC frame.
The method according to claim 27 or 28, wherein the management frame, the target link identifier and the reporting link identifier are carried in the frame body of the functional frame.
A data transmission method, characterized in that the method comprises:

receiving, on the first link, a management frame and a target link identifier on the failed second link;

According to the target link identifier, it is determined to forward the received management frame to the module corresponding to the target link identifier.
The method of claim 31, wherein the method further comprises:

A reporting link identifier is received on the first link, where the reporting link identifier is used to indicate that a response frame is sent on the first link corresponding to the reporting link identifier.
The method according to claim 31 or 32, wherein the target link identifier and the reporting link identifier are carried in the aggregation control A-control field of the MAC frame.
The method according to claim 31 or 32, wherein the management frame, the target link identifier and the reporting link identifier are carried in the frame body of the functional frame.
A data transmission device, characterized in that the data transmission device comprises a unit for performing each step in the method involved in any one of claims 1-13, or for performing any one of the claims 14-26. A unit for each step of the method referred to, or a unit for performing each step in the method referred to in any one of claims 27-30, or for performing any one of claims 31-34 The units involved in the various steps in the method.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, which, when the computer instructions are executed on a computer, cause the computer to execute the method described in any one of claims 1-13. method, or cause the computer to perform the method of any one of claims 14-26, or cause the computer to perform the method of any one of claims 27-30, or cause the computer to perform the method of claim 31- 34 The method of any one.
A chip, characterized in that the chip includes a processing unit and a transceiver pin; the processing unit is configured to perform the processing operation in the method according to any one of claims 1-34, and the transceiver pin is used for in performing the communication operation in the method of any one of claims 1-34.