Multi-link operation (MLO) for easy mesh
A first Multi-AP device configured as a Multi-AP Agent transmits, to a second Multi-AP device configured as a Multi-AP Controller over a first communication link, a Device Provisioning Protocol (DPP) Configuration Request Message indicating multi-link operation (MLO) capabilities of the first Multi-AP device. The first Multi-AP device receives, from the second Multi-AP device over the first communication link, a DPP Configuration Response Message indicating MLO association information responsive to the indicated MLO capabilities, and establishes a backhaul path with a third Multi-AP device, configured as a second Multi-AP Agent, on the first communication link and one or more second communication links according to the MLO association information. The MLO capabilities may be indicated in a DPP Configuration Object of the DPP Configuration Request Message, and the MLO association information may be indicated in a multi-link device (MLD) address field of a DPP Configuration Object of the DPP Configuration Response Message.
1. A first Multiple Access Point (Multi-AP) device, comprising:
a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the first Multi-AP device to:
output a Device Provisioning Protocol (DPP) Configuration Request Message to a second Multi-AP device over a first communication link, the DPP Configuration Request Message indicating multi-link operation (MLO) capabilities of the first Multi-AP device;
obtain a DPP Configuration Response Message from the second Multi-AP device over the first communication link, the DPP Configuration Response Message indicating MLO association information responsive to the indicated MLO capabilities; and
establish a backhaul path with a third Multi-AP device on the first communication link and one or more second communication links according to the MLO association information.
2. The first Multi-AP device of claim 1 , wherein:
the MLO capabilities of the first Multi-AP device are indicated in a DPP Configuration Object of the DPP Configuration Request Message; and
the MLO association information is indicated in a multi-link device (MLD) address field of a DPP Configuration Object of the DPP Configuration Response Message.
3. The first Multi-AP device of claim 1 , wherein the processing system is further configured to cause the first Multi-AP device to:
output a Basic Service Set (BSS) Configuration Request Message to the second Multi-AP device over the first communication link, the BSS Configuration Request Message indicating MLO capabilities of the BSS associated with the first Multi-AP device; and
obtain a BSS Configuration Response Message from the second Multi-AP device over the first communication link, the BSS Configuration Response Message indicating one or more BSSs associated with a common multi-link device (MLD) identifier (ID).
4. The first Multi-AP device of claim 3 , wherein:
the MLO capabilities of the BSS associated with the first Multi-AP device are indicated in a DPP Configuration Object of the BSS Configuration Request Message; and
the one or more BSSs associated with the common MLD ID are indicated in an MLD address field of a DPP Configuration Object of the BSS Configuration Response Message.
5. The first Multi-AP device of claim 1 , wherein:
the first Multi-AP device is a first Multi-AP Agent including a backhaul station (STA) MLD configured to communicate with the third Multi-AP device over one or more of the first or second communication links;
the second Multi-AP device is a Multi-AP Controller configured to onboard the first and third Multi-AP devices according to a Multi-AP communication protocol; and
the third Multi-AP device is a second Multi-AP Agent including a fronthaul AP MLD configured to communicate with the backhaul STA MLD of the first Multi-AP Agent over the one or more of the first or second communication links.
6. The first Multi-AP device of claim 5 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain an AP Capability Query message from the Multi-AP Controller; and
output an AP Capability Report message to the Multi-AP Controller, the AP Capability Report message including an MLO Support Type-Length-Value (TLV) indicating MLO capabilities of the fronthaul AP MLD of the second Multi-AP Agent.
7. The first Multi-AP device of claim 5 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain an AP Capability Query message from the Multi-AP Controller; and
output a Backhaul STA Capability Report message to the Multi-AP Controller, the Backhaul STA Capability Report message including an MLO Support TLV indicating MLO capabilities of the backhaul STA MLD of the first Multi-AP Agent.
8. The first Multi-AP device of claim 5 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain an AP Metrics Query message from the Multi-AP Controller; and
output an AP Metrics Response message to the Multi-AP Controller, the AP Metrics Response message including an Associated Non-AP Operation Type-Length-Value (TLV) for each STA of the backhaul STA MLD of the first Multi-AP Agent.
9. The first Multi-AP device of claim 8 , wherein the Associated Non-AP Operation TLV for a respective STA of the backhaul STA MLD indicates an MLO configuration between the respective STA and a respective AP of a fronthaul AP MLD of the first Multi-AP Agent.
10. The first Multi-AP device of claim 8 , wherein the Associated Non-AP Operation TLVs for the backhaul STA MLD indicate Traffic Identifier (TID)-to-Link Mappings associated with the backhaul STA MLD of the first Multi-AP Agent and a fronthaul AP MLD of the first Multi-AP Agent.
11. The first Multi-AP device of claim 10 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain a Multi-AP Policy Configuration Request message from the Multi-AP Controller, the Multi-AP Policy Configuration Request message including an AP MLD TID-to-Link Mapping Request TLV that triggers a Multi-link Selection procedure for the backhaul STA MLD of the first Multi-AP Agent.
12. The first Multi-AP device of claim 11 , wherein the processing system is further configured to cause the first Multi-AP device to:
reconfigure the TID-to-Link Mappings responsive to the AP MLD TID-to-Link Mapping Request TLV.
13. The first Multi-AP device of claim 5 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain an Associated STA Link Metrics Query message from the Multi-AP Controller; and
output an Associated STA Link Metrics Query Response message to the Multi-AP Controller, the Associated STA Link Metrics Query Response message including an Associated Non-AP Operation Type-Length-Value (TLV) for each non-AP MLD client associated with a fronthaul AP MLD of the first Multi-AP Agent.
14. The first Multi-AP device of claim 13 , wherein the Associated Non-AP Operation TLV for a respective non-AP MLD client indicates an MLO configuration between the respective non-AP MLD client and the fronthaul AP MLD of the first Multi-AP Agent.
15. The first Multi-AP device of claim 13 , wherein the Associated Non-AP Operation TLV for a respective non-AP MLD client indicates a Traffic Identifier (TID)-to-Link Mapping associated with the respective non-AP MLD client and the fronthaul AP MLD of the first Multi-AP Agent.
16. The first Multi-AP device of claim 15 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain a Multi-AP Policy Configuration Request message from the Multi-AP Controller, the Multi-AP Policy Configuration Request message including an AP MLD TID-to-Link Mapping Request TLV that triggers a Multi-link Selection procedure for the fronthaul AP MLD of the first Multi-AP Agent.
17. The first Multi-AP device of claim 16 , wherein the processing system is further configured to cause the first Multi-AP device to:
reconfigure the TID-to-Link Mapping responsive to the AP MLD TID-to-Link Mapping Request TLV.
18. The first Multi-AP device of claim 5 , wherein the processing system is further configured to cause the first Multi-AP device to:
obtain one or more link identifiers (IDs) from the Multi-AP Controller, each link ID indicating a respective communication link enabled for multi-link communications between the backhaul STA MLD of the first Multi-AP Agent and a fronthaul AP MLD of the first Multi-AP Agent.
19. A method for wireless communication by a first Multi-AP device, comprising:
transmitting a Device Provisioning Protocol (DPP) Configuration Request Message to a second Multi-AP device over a first communication link, the DPP Configuration Request Message indicating multi-link operation (MLO) capabilities of the first Multi-AP device;
receiving a DPP Configuration Response Message from the second Multi-AP device over the first communication link, the DPP Configuration Response Message indicating MLO association information responsive to the indicated MLO capabilities; and
establishing a backhaul path with a third Multi-AP device on the first communication link and one or more second communication links according to the MLO association information.
20. The method of claim 19 , wherein:
the MLO capabilities of the first Multi-AP device are indicated in a DPP Configuration Object of the DPP Configuration Request Message; and
the MLO association information is indicated in a multi-link device (MLD) address field of a DPP Configuration Object of the DPP Configuration Response Message.
21. The method of claim 19 , further comprising:
transmitting a Basic Service Set (BSS) Configuration Request Message to the second Multi-AP device over the first communication link, the BSS Configuration Request Message indicating MLO capabilities of the BSS associated with the first Multi-AP device; and
receiving a BSS Configuration Response Message from the second Multi-AP device over the first communication link, the BSS Configuration Response Message indicating one or more BSSs associated with a common multi-link device (MLD) identifier (ID).
22. The method of claim 21 , wherein:
the MLO capabilities of the BSS associated with the first Multi-AP device are indicated in a DPP Configuration Object of the BSS Configuration Request Message; and
the one or more BSSs associated with the common MLD ID are indicated in an MLD address field of a DPP Configuration Object of the BSS Configuration Response Message.
23. The method of claim 19 , wherein:
the first Multi-AP device is a first Multi-AP Agent including a backhaul station (STA) MLD configured to communicate with the third Multi-AP device over one or more of the first or second communication links;
the second Multi-AP device is a Multi-AP Controller configured to onboard the first and third Multi-AP devices according to a Multi-AP communication protocol; and
the third Multi-AP device is a second Multi-AP Agent including a fronthaul AP MLD configured to communicate with the backhaul STA MLD of the first Multi-AP Agent over the one or more of the first or second communication links.
24. The method of claim 23 , further comprising:
receiving an AP Metrics Query message from the Multi-AP Controller; and
transmitting an AP Metrics Response message to the Multi-AP Controller, the AP Metrics Response message including an Associated Non-AP Operation Type-Length-Value (TLV) for each STA of the backhaul STA MLD of the first Multi-AP Agent.
25. The method of claim 24 , wherein the Associated Non-AP Operation TLV for a respective STA of the backhaul STA MLD indicates an MLO configuration between the respective STA and a respective AP of a fronthaul AP MLD associated with the first Multi-AP Agent.
26. The method of claim 25 , wherein the Associated Non-AP Operation TLVs for the backhaul STA MLD indicate a Traffic Identifier (TID)-to-Link Mapping associated with the backhaul STA MLD of the first Multi-AP Agent and a fronthaul AP MLD of the first Multi-AP Agent.
27. The method of claim 26 , further comprising:
receiving a Multi-AP Policy Configuration Request message from the Multi-AP Controller, the Multi-AP Policy Configuration Request message including an AP MLD TID-to-Link Mapping Request TLV that triggers a Multi-link Selection procedure for the backhaul STA MLD of the first Multi-AP Agent.
28. The method of claim 27 , further comprising:
reconfiguring the TID-to-Link Mapping responsive to the AP MLD TID-to-Link Mapping Request TLV.
29. The method of claim 23 , further comprising:
receiving an Associated STA Link Metrics Query message from the Multi-AP Controller; and
transmitting an Associated STA Link Metrics Query Response message to the Multi-AP Controller, the Associated STA Link Metrics Query Response message including an Associated Non-AP Operation Type-Length-Value (TLV) for each non-AP MLD client associated with a fronthaul AP MLD of the first Multi-AP Agent.
30. The method of claim 29 , wherein the Associated Non-AP Operation TLV for a respective non-AP MLD client indicates an MLO configuration between the respective non-AP MLD client and the fronthaul AP MLD of the first Multi-AP Agent.