SISO and MU-MIMO Beamforming Proposal in IEEE 802.11-17

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Explore the proposal for enhancing Single User (SU) and Multi-User (MU) Multiple Input Multiple Output (MIMO) beamforming in IEEE 802.11-17 through the integration of BRP frames for sector sweep feedback information instead of traditional feedback frames. Addressing the need for defined frames in both SU-MIMO and MU-MIMO scenarios, the proposal aims to improve efficiency and accuracy in beamforming processes.

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Feb 2017 doc.: IEEE 802.11-17/0286r0 SISO phase of SU/MU-MIMO Beamforming Date: 2017-02-23 Authors: Name Affiliations Address Phone email Lei Huang lei.huang@sg.panasonic.com Hiroyuki Motozuka Panasonic Corporation Gaius Wee Takenori Sakamoto Submission Slide 1 Lei Huang (Panasonic)

Feb 2017 doc.: IEEE 802.11-17/0286r0 Background The SISO Feedback frame is used to carry sector sweep feedback information. I-TXSS SISO Feedback Short Short Short SISO Short SSW SSW Short SSW SSW Short SSW SSW SISO Feedback Feedback ... ... Initiator Short Short Short SISO Short SSW SSW Short SSW SSW Short SSW SSW SISO Feedback Feedback ... ... Responder R-TXSS The DMG SISO Setup frame is used to poll each responder and the DMG SISO Setup Response frame is used to carry sector sweep feedback information. SISO phase of SU-MIMO beamforming I-TXSS subphase (optional) Setup subphase (mandatory) ... ... DMG SISO Setup 1 DMG SISO Setup 2 DMG SISO Setup M CDOWN=N CDOWN=N-1 CDOWN=0 Initiator DMG SISO Setup Response 1 Responder 1 DMG SISO Setup Response 2 Responder 2 ... ... ... DMG SISO Setup Response M Responder M SISO phase of MU-MIMO beamforming Submission 2 Lei Huang (Panasonic)

Feb 2017 doc.: IEEE 802.11-17/0286r0 Problem Statement For SU-MIMO beamforming, the SISO Feedback frame is not defined in D0.2 [1]. For MU-MIMO beamforming, the DMG SISO Setup frame and DMG SISO Setup Response frame are not defined in D0.2 [1]. Submission 3 Lei Huang (Panasonic)

Feb 2017 doc.: IEEE 802.11-17/0286r0 Proposal For SU-MIMO beamforming, the BRP frame is reused to carry sector sweep feedback information instead of the SISO Feedback frame. The BRP frame is capable of carrying the channel measurement feedback for sector sweep using short SSW packets [2]. For MU-MIMO beamforming, the BRP frame is reused to poll each responder to feedback sector sweep information and to carry sector sweep feedback information instead of the DMG SISO Setup frame and DMG SISO Setup Response frame. Similar to what has been done in 11ad BRP setup subphase; The BRP frame is capable of carrying the channel measurement feedback for sector sweep using short SSW packets [2]. For MU-MIMO beamforming, the Setup subphase is renamed to the SISO Feedback subphase The goal of the Setup subphase is to collect feedback of the last I-TXSS from each responder intended to be part of the MU group, which is to be used for sector down-selection in the following MU-MIMO BF Setup subphase. The renaming can avoid unnecessary confusion with the following MU-MIMO BF Setup subphase and unify the terms with SU-MIMO beamforming. Submission 4 Lei Huang (Panasonic)

Feb 2017 doc.: IEEE 802.11-17/0286r0 Proposal (cont.) I-TXSS SISO Feedback For proposed changes on SU-MIMO beamforming and MU-MIMO beamforming, please refer to the document (IEEE 802.11-17/0287r0) for details. Short Short Short Short SSW SSW Short SSW SSW Short SSW SSW ... ... BRP BRP Initiator Short Short Short Short SSW SSW Short SSW SSW Short SSW SSW ... ... BRP BRP Responder R-TXSS SISO phase of SU-MIMO beamforming I-TXSS SISO Feedback Short Short Short Short SSW SSW Short SSW SSW Short SSW SSW ... ... BRP BRP BRP BRP ... ... BRP BRP Initiator BRP BRP Responder 1 BRP BRP Responder 2 ... ... BRP BRP Responder M SISO phase of MU-MIMO beamforming Submission 5 Lei Huang (Panasonic)

Feb 2017 doc.: IEEE 802.11-17/0286r0 SP Do you agree to incorporate the proposed changes on SU- MIMO beamforming and MU-MIMO beamforming as shown in IEEE 802.11-17/0287r0 into the next draft 11ay specification? Y N A Submission 6 Lei Huang (Panasonic)