R-TWT SP Protection in 11bn: Considerations and Proposals
This document discusses considerations and proposals for R-TWT SP protection in the IEEE 802.11-23/2212r0 standard, focusing on AP coordination, overlapping R-TWT SPs, STAs in a BSS, and proposals for protection mechanisms. Topics include avoiding overlap between neighboring APs, informing associated APs of OBSS R-TWT SPs, and defining elements to minimize signaling overhead.
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Nov 2023 Doc.: IEEE 802.11-23/2212r0 R-TWT protection in 11bn Date: 2023-12-22 Authors: Name Affiliations Address Phone email Xiangxin Gu Spreadtrum Xiangxin.gu@unisoc.com Yingqiao Quan Spreadtrum Lei Zhou H3C Submission Slide 1 Xiangxin Gu (Spreadtrum)
Nov 2023 Doc.: IEEE 802.11-23/2212r0 Background MAP coordinated R-TWT SP protection has been discussed for a long time. In this contribution, we provide considerations and proposals on R-TWT SP protection in 11bn. Submission Slide 2 Xiangxin Gu (Spreadtrum)
Nov 2023 Doc.: IEEE 802.11-23/2212r0 Considerations on R-TWT SP protection 11bn APs of OBSS R-TWT SPs may be not in an ESS. They are just neighboring. Overlapped R-TWT SPs should be avoided between 2 APs that can hear from each other. If there have to be overlapped R-TWT SPs between the 2 APs, C-OFDMA and C-TDMA etc. can be candidate solutions. However, for APs not belonging to an ESS, there may be security issues. Further study is needed. STAs in a BSS may have different OBSS R-TWT SPs to protect, subject to their locations. STA22 STA31 STA21 AP1 STA12 AP2 AP3 STA11 STA32 Submission Slide 3 Xiangxin Gu (Spreadtrum)
Nov 2023 Doc.: IEEE 802.11-23/2212r0 Proposals on R-TWT SP protection in 11bn Based on the previous considerations, we propose in a BSS: A STA informs its associated AP the OBSS R-TWT SPs to protect. During each of the OBSS R-TWT SPs, The STA should not EDCA the channel to protect the OBSS R-TWT SP. The AP should not send to the STA to avoid transmission failure. The AP may send to another STA that doesn t inform the OBSS R-TWT SP. The AP broadcasts the OBSS R-TWT SPs to protect. During each of the OBSS R-TWT SPs, The AP should not EDCA the channel to protect the OBSS R-TWT SP. STAs in the BSS should not send to the AP to avoid transmission failure. RCPI of the Beacon frame sent by the AP of each OBSS R-TWT SP to protect can be added. Spatial Reuse can be studied in further. New element to describe protected periods of the OBSS R-TWT SPs can be defined to save signaling overhead. Not all information in TWT element are needed. Submission Slide 4 Xiangxin Gu (Spreadtrum)
Nov 2023 Doc.: IEEE 802.11-23/2212r0 Conclusion For OBSS R-TWT SPs protection, different locations of STAs should be taken into consideration. Submission Slide 5 Xiangxin Gu (Spreadtrum)
Nov 2023 Doc.: IEEE 802.11-23/2212r0 References [1] https://mentor.ieee.org/802.11/dcn/23/11-23-0226-02-0uhr-coordination-of-r-twt-for-multi-ap- deployment.pptx [2] https://mentor.ieee.org/802.11/dcn/23/11-23-0250-00-0uhr-ap-coordination-with-r-twt.pptx [3] https://mentor.ieee.org/802.11/dcn/23/11-23-0291-00-0uhr-r-twt-multi-ap-coordination.pptx [4] https://mentor.ieee.org/802.11/dcn/23/11-23-1087-00-0uhr-announcement-for-r-twt-coordination.pptx [5] https://mentor.ieee.org/802.11/dcn/23/11-23-0046-02-0uhr-multi-ap-coordination-for-low-latency-traffic- delivery-usage-scenarios-and-potential-features.pptx [6] https://mentor.ieee.org/802.11/dcn/23/11-23-1916-00-00bn-r-twt-coordination-in-multi-bss.pptx [7] https://mentor.ieee.org/802.11/dcn/23/11-23-1952-00-00bn-coordinated-r-twt-for-multi-ap-scenarios- follow-up.pptx [8] https://mentor.ieee.org/802.11/dcn/23/11-23-2064-00-00bn-sta-assisted-multi-ap-coordination.pptx Submission Slide 6 Xiangxin Gu (Spreadtrum)
