CoBF and CoSR Procedures for IEEE 802.11
"Proposed procedures for CoBF and CoSR in IEEE 802.11 aim to enhance flexibility and agreement levels. STAs can recommend themselves for enrollment, enabling better AP-STA coordination."
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Jun. 2025 Doc.: IEEE 802.11-25/1022r0 CoSR and CoBF follow up Name Jay Yang Affiliations Address Phone email Yang.zhijie@zte.com.cn ZTE YanLi ZTE Yun Li ZTE Bo Sun Sanechips Submission Jay Yang al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 Background Known from the following passed motion, the AP decides which associated STA to participate the CoBF and CoSR operation. M#327,M#328,M#311 Co-BF Invite frame includes the Per-User Info in Sharing BSS Co-BF Response frame includes the Per-User Info in Shared BSS Co-BF Sync frame includes the Per-User Info in Both BSS How AP to select the candidate associated STAs? Based on the associated STA s QoS information, like SCS, QoS characteristic Randomly select some associated STAs Submission Slide 2 Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 Proposal Without a certainly level agreement from STA, such feature may become stiff in the implementation. We propose to define a procedure to allow STA to recommend itself to enroll in the CoSR, CoBF scheme via some signaling exchange, to make the implementation make flexible. The STA is unaware of the CoBF and CoSR operation between its associated AP and neighbor AP until UHR sounding or CoSR transmission happened. Before that, AP should provide the MAPC negotiation information to its associated STAs. Submission Slide 3 Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 The proposed procedure with recommendation functionality in CoSR,CoBF 1) MAPC discovery & MAPC negotiation 2) AP provides the negotiated CoSR, CoBF information to its associated STAs via a TBD signaling. The neighbor AP s BSSID information should be included. 3) Optional Measurement to obtain RSSI information between STA and OBSS AP Reuse some exist protocol, like RTS/CTS, probe request/response etc. 4) Recommend itself to enroll in CoSR and/or CoBF procedure based on its associated AP s negotiated MAPC information Reuse the exist protocol with some extension, like Beacon report. 5) The AP may schedule the self recommended STA in CoSR and/or CoBF procedure. 6) The AP synchronize to the STA if the CoSR,CoBF agreement update. Set up new agreement or agreement tear down The STA should cease measurement and self recommendation procedure if no CoSR or CoBF agreement existed any more. Slide 4 Submission Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 The following figure depicts an example that the STA recommends itself to enroll in the CoSR, CoBF procedure Submission Slide 5 Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 Summary To make the implementation more flexible and certainly level agreement in CoBF and CoSR, we propose to define a STA self recommendation procedure with following additional signaling exchange. The AP shall provide CoBF, CoSR negotiation information(including the agreement set-up, update, etc.) to the STA. The STA optional perform some measurement with the target OBSS AP The STA self recommend to enroll in a certain CoBF, CoSR procedure. Submission Slide 6 Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 THANK YOU Submission
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 Reference 802.11bn draft0.2 24/209r15 TGbn Specification Framework for TGbn Submission Slide 8 Jay Yang, et al. (ZTE)
Jun. 2025 Doc.: IEEE 802.11-25/1022r0 SP1 Do you agree to define a preparation phase for CoBF and CoSR including the following signaling exchange: The AP shall provide CoBF, CoSR negotiation information(including the agreement set-up, update, etc.) to the STA. The STA optional perform some measurement with the target OBSS AP The STA self recommend to enroll in a certain CoBF, CoSR procedure. Submission Slide 9 Jay Yang, et al. (ZTE)
