Coordinated Beamforming for IEEE 802.11bn: Opportunities and Framework
Explore the potential of Coordinated Beamforming (Co-BF) in IEEE 802.11bn for enhancing spatial reuse and reducing latency. Learn about the objectives, meaning, and framework of Co-BF, along with its implications for Wi-Fi access points. Discover how Co-BF enables efficient channel and time resource sharing, leading to improved network performance. Join the discussion on advancing Co-BF capabilities for future wireless communications.
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January 2024 doc.: IEEE 802.11-24/0009r0 Coordinated Beamforming for 802.11bn Date: 2024-01-03 Authors: Name Okan Mutgan Affiliations Nokia Address Phone email okan.mutgan@nokia- sbell.com Prabodh Varshney Lorenzo Galati Giordano Mika Kasslin Francesc Wilhelmi Gianluca Fontanesi Submission Slide 1 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 Background Multi-AP coordination (MAPC) is one of the most discussed protocol enhancements for 802.11bn. MAPC may enable development of new features, among them Coordinated Beamforming (Co-BF). Co-BF has been already extensively discussed in TGbe [1-5] and leverages on the applications of beamforming and null steering capabilities. Submission Slide 2 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 Objectives Clarify Co-BF meaning, its requirements and opportunities. Submission Slide 3 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 What does Co-BF mean? Wi-Fi access points (APs) are densely deployed and equipped with multiple antennas. Digital precoding/filtering techniques allow APs to focus radiation patterns towards users to serve, BUT also to null interference towards/from overlapping basic service set (OBSS) devices. The application of radiation nulls requires CSI acquisition from OBSS devices. APs equipped with Co-BF with null steering have the possibility to share channel and time resources, avoiding contentions and interference. Submission Slide 4 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 Co-BF framework for 802.11bn 1. Define a common MAPC framework (wireless or wired) valid for Co-BF but also for other coordination techniques: Coordination set establishment and maintenance with the means available in the semi-static MAPC framework 2. Define a specific Co-BF framework for: CSI acquisition from OBSS devices (CSI acquisition means for own devices reused). Allocation and communication of nulling capabilities in both UL and DL directions. 3. Data transmission with beams and nulls activated Relaxing channel access constraints (concurrent transmission without power reduction) Submission Slide 5 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 Co-BF opportunities Through Co-BF with null steering is possible to boost spatial reuse opportunities by making media available for simultaneous transmissions, thus reducing worst-case latency [2, 5]. We aim to highlight the opportunity to build upon what has been already discussed [1-5] and straw-polled (see below) in TGbe. Submission Slide 6 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 Straw poll Do you believe coordinated beamforming with null steering should be considered for inclusion in the 802.11 TGbn Specification Framework Document (SFD)? Yes No Abstain Submission Slide 7 Okan Mutgan et al., Nokia
January 2024 doc.: IEEE 802.11-24/0009r0 References [1] Coordinated Null Steering for EHT , 19/0811. [2] Performance of Coordinated Null Steering in 802.11be , 19/1212. [3] Coordinated Beamforming/Null Steering in 802.11be , 19/1594. [4] Downlink spatial reuse parameter framework with coordinated Beamforming/Null Steering for 802.11be , 19/1779. [5] Performance of parameterized spatial reuse (PSR) with coordinated beamforming/null steering for 802.11be , 20/0091. Submission Slide 8 Okan Mutgan et al., Nokia
