Multi-link communication
This disclosure provides systems, methods, and apparatuses for associating a wireless communication device such as a wireless station (STA) of a STA multi-link device (MLD) with an access point (AP) MLD that includes a first AP associated with a first communication link of the AP MLD and includes one or more secondary APs associated with one or more respective secondary communication links of the first AP MLD. The first AP includes one or more virtual APs, and the first AP and the one or more virtual APs of the first AP belong to a first multiple basic service set identifier (BSSID) set associated with the first communication link. The AP MLD transmits a frame including a first element carrying discovery information for the first AP and the one or more virtual APs belonging to the first multiple BSSID set, and including a second element carrying discovery information for the one or more secondary APs of the first AP MLD associated with the one or more respective secondary communication links of the first AP MLD.
1. A method for wireless communication performed by an access point (AP) multi-link device (MLD), comprising:
generating a frame by a first AP that is affiliated with the AP MLD and is associated with a first communication link of the AP MLD, the AP MLD comprising one or more affiliated secondary APs that are associated with one or more respective secondary communication links of the AP MLD, the frame comprising:
information for the first AP, the information comprising at least one of an operating class of the first AP, a wireless channel of the first AP, and a basic service set identifier (BSSID) of the first AP;
a first portion carrying information for each secondary AP of the one or more affiliated secondary APs, the information comprising an operating class of the respective secondary AP, a wireless channel of the respective secondary AP, and a BSSID of the respective secondary AP; and
a second portion carrying common attributes of the AP MLD; and
transmitting the frame on the first communication link.
2. The method of claim 1 , further comprising:
receiving a request from a wireless station (STA) of a STA MLD in accordance with the transmitted frame, the request comprising a multi-link (ML) association request or a ML probe request; and
transmitting one or both of association information or the information for the first AP and one or both of the association information and the information for the one or more affiliated secondary APs in accordance with the ML association request or the ML probe request.
3. The method of claim 2 , further comprising:
associating the STA MLD with the AP MLD in accordance with the request; and
communicating with the STA MLD on one or more of the first communication link or the one or more respective secondary communication links in accordance with the association.
4. The method of claim 3 , wherein the associating comprises:
establishing a common security context between a first medium access control service access point (MAC-SAP) endpoint of the AP MLD and a second MAC-SAP endpoint of the STA MLD, each of the first and second MAC-SAP endpoints for communicating over the first communication link and the one or more respective secondary communication links.
5. The method of claim 2 , further comprising:
establishing a block acknowledgement (BA) session with the STA MLD in accordance with an affiliation of one or more traffic identifiers (TIDs) with a first group of communication links that comprises one or more of the first communication link or the one or more respective secondary communication links.
6. The method of claim 5 , further comprising:
dynamically reaffiliating the one or more TIDs with a second group of communication links that includes one or more of the first communication link or the one or more respective secondary communication links, the first group of communication links different than the second group of communication links; and
transmitting an Add Block Acknowledgment (ADDBA) frame including a field carrying an indication of the reaffiliation.
7. The method of claim 1 , further comprising:
receiving, by the first AP on the first communication link, a directed probe request from a wireless station (STA) of a STA MLD, the directed probe request requesting one or more of the information, operating parameters, capabilities, or an operating class for each AP affiliated with the AP MLD; and
transmitting the frame as a multi-link (ML) probe response frame in accordance with receiving the directed probe request from the STA MLD.
8. The method of claim 7 , wherein the directed probe request indicates one or more of capabilities, operating parameters, an operating class, or identification information of each STA of the STA MLD.
9. The method of claim 1 , wherein the frame further comprises a first identifier (ID) field carrying a first identifier that uniquely identifies one or both of the AP MLD with which the first AP is affiliated or a respective secondary AP of the one or more affiliated secondary APs.
10. The method of claim 9 , wherein the frame further comprises one or more second ID fields, each field of the one or more second ID fields carrying one or both of a link identifier that identifies a respective secondary AP of the one or more secondary APs or an MLD identifier that identifies the first AP MLD.
11. The method of claim 10 , wherein each link identifier of the first link identifier and the one or more second link identifiers associates one or more traffic identifiers (TIDs) with a respective communication link of the first communication link and the one or more respective secondary communication links.
12. The method of claim 1 , wherein:
the first portion comprises one or more per-STA profile subelements, each per-STA profile subelement indicating the information for a corresponding secondary AP of the one or more affiliated secondary APs associated with a respective secondary communication link of the one or more respective secondary communication links; and
the second portion comprises an MLD common element or field indicating the common attributes of the AP MLD.
13. The method of claim 12 , wherein each per-STA profile subelement further includes one or more of capability information or operating parameter information of a corresponding secondary AP of the one or more affiliated secondary APs, the capability information indicating one or more of high-throughput (HT) capabilities, very high-throughput (VHT) capabilities, high efficiency (HE) capabilities, HE 6 GHz Band capabilities, or extremely high-throughput (EHT) capabilities, and the operating parameter information indicating one or more of HT operation parameters, VHT operation parameters, HE operation parameters, EHT operation parameters, enhanced distributed channel access (EDCA) parameters, multi-user (MU) EDCA parameters, uplink (UL) orthogonal frequency division multiple access (OFDMA) random access (UORA) parameters, target wait time (TWT) parameters, fast initial link setup (FILS) parameters, or spatial reuse (SR) parameters.
14. The method of claim 13 , wherein an absence of a particular capability or operating parameter from a respective per-STA profile subelement of the one or more per-STA profile subelements indicates that the particular capability or operating parameter of the corresponding secondary AP of the one or more affiliated secondary APs is the same as the particular capability or operating parameter of the first AP.
15. The method of claim 13 , wherein the frame further includes a field within each per-STA profile subelement carrying an indication of whether the per-STA profile subelement of the one or more per-STA profile subelements carries all of the information for the corresponding secondary AP or only a portion of the information for the corresponding secondary AP.
16. The method of claim 1 , wherein the first portion comprises a reduced neighbor report (RNR) element, and the second portion comprises a multi-link element.
17. The method of claim 16 , wherein the RNR element indicates one or more of a transmit power level, a critical update, or an applicable amendment to the IEEE 802.11 family of standards for each AP of the one or more secondary APs.
18. The method of claim 16 , wherein:
the RNR element includes one or more neighbor AP information fields, each field of the one or more neighbor AP information fields including a unique link identifier (ID) that identifies a corresponding communication link of the one or more secondary communication links associated with a respective one or more secondary APs; and
the multi-link element includes one or more per-STA profile subelements, each per-STA profile subelement of the one or more per-STA profile subelements including a corresponding one of the unique link IDs and one or more of capabilities or operating parameters for a respective AP of the one or more affiliated secondary APs.
19. The method of claim 1 , wherein the frame further includes a field containing an indication of a presence or absence of each of the common attributes indicated in the second portion of the frame.
20. The method of claim 1 , wherein the frame further indicates whether the AP MLD supports simultaneous transmit-and-receive (STR) operations across multiple links of the first communication link or the one or more respective secondary communication links.
21. The method of claim 1 , wherein the frame comprises one of a beacon frame, a probe response frame, an association response frame, or a reassociation response frame.
22. The method of claim 1 , wherein:
the frame further includes an indication of one or more critical updates corresponding to one or more of the first AP or the one or more affiliated secondary APs; and
the one or more critical updates include a change in operating channels or a change in basic service set (BSS) parameters for one or more APs of the first AP or the one or more secondary APs.
23. An access point (AP) multi-link device (MLD), comprising:
one or more modems;
one or more processors communicatively coupled with the one or more modems; and
one or more memories communicatively coupled with the one or more processors and storing processor-readable code that, when executed by the one or more processors in conjunction with the one or more modems, causes the AP MLD to perform operations comprising:
generating a frame by a first AP that is affiliated with the AP MLD and is associated with a first communication link of the AP MLD, the AP MLD comprising one or more affiliated secondary APs that are associated with one or more respective secondary communication links of the AP MLD, the frame comprising:
information for the first AP, the information comprising at least one of an operating class of the first AP, a wireless channel of the first AP, and a basic service set identifier (BSSID) of the first AP;
a first portion carrying information for each secondary AP of the one or more affiliated secondary APs, the information comprising an operating class of the respective secondary AP, a wireless channel of the respective secondary AP, and a BSSID of the respective secondary AP; and
a second portion carrying common attributes of the AP MLD; and
transmitting the frame on the first communication link.
24. A method for wireless communication performed by a wireless station (STA) multi-link device (MLD), comprising:
receiving, on a first communication link of an AP MLD, a frame from a first access point (AP) that is affiliated with the AP MLD and is associated with the first communication link of the AP MLD, the AP MLD comprising one or more affiliated secondary APs that are associated with one or more respective secondary communication links of the AP MLD, the frame comprising:
information for the first AP, the information comprising at least one of an operating class of the first AP, a wireless channel of the first AP, and a basic service set identifier (BSSID) of the first AP;
a first portion carrying information for each secondary AP of the one or more affiliated secondary APs, the information comprising an operating class of the respective secondary AP, a wireless channel of the respective secondary AP, and a BSSID of the respective secondary AP; and
a second portion carrying common attributes of the AP MLD.
25. The method of claim 24 , further comprising:
transmitting a request comprising a multi-link (ML) association request to the AP MLD, the ML association request indicating one or more of capabilities, operating parameters, an operating class, or identification information of each STA of the STA MLD; and
receiving association information for the first AP and association information for the one or more affiliated secondary APs in accordance with the ML association request.
26. The method of claim 25 , further comprising:
associating the STA MLD with the AP MLD in accordance with the association information; and
communicating with the AP MLD on one or more of the first communication link or the one or more respective secondary communication links in accordance with the association.
27. The method of claim 26 , wherein the associating comprises:
establishing a block acknowledgement (BA) session with the AP MLD in accordance with an affiliation of one or more traffic identifiers (TIDs) with a first group of communication links that comprises one or more of the first communication link or the one or more secondary communication links.
28. The method of claim 27 , further comprising:
dynamically reaffiliating the one or more TIDs with a second group of communication links that includes one or more of the first communication link or the one or more respective secondary communication links, the first group of communication links different than the second group of communication links; and
transmitting an Add Block Acknowledgment (ADDBA) frame including a field carrying an indication of the reaffiliation.
29. The method of claim 24 , further comprising:
transmitting a directed probe request to the first AP, the directed probe request requesting one or more of the information, operating parameters, capabilities, or an operating class for each AP affiliated with the AP MLD; and
receiving the frame in accordance with transmission of the directed probe request to the first AP affiliated with the AP MLD.
30. A wireless station (STA) multi-link device (MLD), comprising:
one or more modems;
one or more processors communicatively coupled with the one or more modems; and
one or more memories communicatively coupled with the one or more processors and storing processor-readable code that, when executed by the one or more processors in conjunction with the one or more modems, causes the STA MLD to perform operations comprising:
receiving, on a first communication link of an AP MLD, a frame from a first access point (AP) that is affiliated with the AP MLD and is associated with the first communication link of the AP MLD, the AP MLD comprising one or more affiliated secondary APs associated with one or more respective secondary communication links of the AP MLD, the frame comprising:
information for the first AP, the information comprising at least on of an operating class of the first AP, a wireless channel of the first AP, and a basic service set identifier (BSSID) of the first AP;
a first portion indicating information for each secondary AP of the one or more affiliated secondary APs, the information comprising an operating class of the respective secondary AP, a wireless channel of the respective secondary AP, and a BSSID of the respective secondary AP; and
a second portion indicating common attributes of the AP MLD.