Method and wireless communication terminal for transmitting and receiving data in a wireless communication system

By using request and response frames to map traffic identifiers (TIDs) and links in multi-link device (MLD) systems, the problem of undefined mapping relationships in wireless communication systems is solved, thereby improving service quality and management efficiency.

CN122179929APending Publication Date: 2026-06-09WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC
Filing Date
2021-08-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing wireless communication systems, when providing high-speed wireless LAN services, especially in the process of mapping traffic identifiers (TIDs) and links between multi-link devices, suffer from the problem that the mapping relationship is not clearly indicated, which affects service quality and management efficiency.

Method used

A multi-link device (MLD) system is adopted to map traffic identifiers (TIDs) and links by transmitting request frames and response frames. The mapping information and transmission direction information in the request frame are used to implicitly determine the mapping relationship that is not indicated, and the link is managed and the mapping is adjusted by management frames.

Benefits of technology

It improves the service quality of multi-link devices, realizes effective mapping and management of TID to links, and enhances the flexibility and efficiency of the system.

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Abstract

The present invention relates to a method of transmitting and receiving data in a wireless communication system and a wireless communication terminal. A method of a multi-link device (MLD) of a wireless communication system transmitting a frame is disclosed. The MLD transmits a request frame for mapping between a traffic identifier (TID) and a link, the request frame including first mapping information for setting a mapping relationship between at least one TID among a plurality of TIDs and at least one link and information related to a number of the at least one TID for which mapping with the at least one link is requested. Then, the MLD receives a response frame in response to the request frame, a first remaining TID among the plurality of TIDs, other than the at least one TID, effectively maintaining a previously set mapping relationship with a link or applying a default mapping relationship, the first remaining TID being indicated by the first mapping information not to have a mapping relationship with a special link.
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Claims

1. A non-access point multilink device (NMPMLD) configured to operate in a wireless communication system, the NMPMLD comprising: Communication module; as well as A processor configured to control the communication module. The processor is configured as follows: A request frame is transmitted to the AP MLD, the request frame including a TID-to-link mapping element associated with the link mapped to each TID in one or more Traffic Identifiers (TIDs). Receive a response frame as a response to the request frame, and According to the multi-link reconfiguration process, some or all of the configuration links of a specific TID that are mapped to one or more TIDs are removed. Specifically, based on the fact that a particular TID has no remaining setup links due to the removal of some or all of the setup links mapped to that particular TID, the particular TID is mapped to all remaining enable links, and The response frame indicates whether the mapping indicated by the TID to the link mapping element is accepted.

2. The non-AP MLD according to claim 1, in, When a particular TID is not mapped to any remaining setup links due to the removal of all setup links mapped to that particular TID, the particular TID is mapped to all remaining enabled links.

3. The non-AP MLD according to claim 1, in, When a particular TID is mapped to any remaining setup link due to the removal of some of the setup links that were mapped to that particular TID, the particular TID does not change the state of being mapped to all the remaining enabled links.

4. The non-AP MLD according to claim 1, in, The TID-to-link mapping element includes: i) a link mapping field for one or more TIDs, and ii) a link mapping presence subfield indicating the presence or absence of each of the link mapping fields for the one or more TIDs.

5. The non-AP MLD according to claim 4, in, Each indication in the link mapping field of the one or more TIDs is mapped to the link of the corresponding TID in the one or more TIDs.

6. The non-AP MLD according to claim 4, in, When the link mapping field for a specific TID is missing in the link mapping field of one or more TIDs, the most recent TID to link mapping for that specific TID remains unchanged and is valid.

7. The non-AP MLD according to claim 4, in, When no TID-to-link mapping is performed for any of the one or more TIDs, the TID is mapped to all the remaining enabled links.

8. The non-AP MLD according to claim 1, in, The request frame further includes transmission direction information indicating the transmission direction of the one or more TIDs.

9. The non-AP MLD according to claim 1, in, When i) the request frame is a probe request frame as a management frame, and ii) the response frame is a probe response frame as a management frame, the deactivated link for the non-AP MLD is used in the request frame and the response frame.

10. The non-AP MLD according to claim 1, wherein, The processor is configured as follows: Receive management frames, The management frame is transmitted only on the link mapped to the one or more TIDs.

11. The non-AP MLD according to claim 10, in, The management frame is transmitted based on the assigned Access Class (AC).

12. A method for transmitting frames in a wireless communication system by a non-access point multilink device (Non-AP MLD), the method comprising: Transmit a request frame to the AP MLD, the request frame including a TID-to-link mapping element associated with the link mapped to each of the one or more traffic identifiers (TIDs); Receive a response frame as a response to the request frame; as well as According to the multi-link reconfiguration process, some or all of the configuration links of a specific TID that are mapped to one or more TIDs are removed. Specifically, based on the fact that a particular TID has no remaining setup links due to the removal of some or all of the setup links mapped to that particular TID, the particular TID is mapped to all remaining enable links, and The response frame indicates whether the mapping indicated by the TID to the link mapping element is accepted.

13. The method according to claim 12, in, When a particular TID is not mapped to any remaining setup links due to the removal of all setup links mapped to that particular TID, the particular TID is mapped to all remaining enabled links.

14. The method according to claim 12, in, When a particular TID is mapped to any remaining setup link due to the removal of some of the setup links that were mapped to that particular TID, the particular TID does not change the state of being mapped to all the remaining enabled links.

15. The method according to claim 12, in, The TID-to-link mapping element includes: i) a link mapping field for one or more TIDs, and ii) a link mapping presence subfield indicating the presence or absence of each of the link mapping fields for the one or more TIDs.

16. The method according to claim 15, in, Each indication in the link mapping field of the one or more TIDs is mapped to the link of the corresponding TID in the one or more TIDs.

17. The method according to claim 15, in, When the link mapping field for a specific TID is missing in the link mapping field of one or more TIDs, the most recent TID to link mapping for that specific TID remains unchanged and is valid.

18. The method according to claim 15, in, When no TID-to-link mapping is performed for any of the one or more TIDs, the TID is mapped to all the remaining enabled links.

19. The method according to claim 12, in, The request frame further includes transmission direction information indicating the transmission direction of the one or more TIDs.

20. The method according to claim 12, in, When i) the request frame is a probe request frame as a management frame, and ii) the response frame is a probe response frame as a management frame, the deactivated link for the non-AP MLD is used in the request frame and the response frame.

21. The method according to claim 12, wherein the method further comprises: Receive management frames, The management frame is transmitted only on the link mapped to the one or more TIDs.

22. The method according to claim 21, in, The management frame is transmitted based on the assigned Access Class (AC).

23. An access point multilink device (AP MLD) for a wireless communication system, the AP MLD comprising: Communication module; as well as A processor configured to control the communication module. The processor is configured as follows: Receive a request frame from a non-AP MLD, the request frame including a TID-to-link mapping element associated with the link mapped to each of one or more Traffic Identifiers (TIDs), and A response frame is transmitted in response to the request frame. Specifically, according to the multi-link reconfiguration process, some or all of the configuration links of a specific TID mapped to one or more TIDs are removed. Specifically, based on the fact that a particular TID has no remaining setup links due to the removal of some or all of the setup links mapped to that particular TID, the particular TID is mapped to all remaining enable links, and The response frame indicates whether the mapping indicated by the TID to the link mapping element is accepted.