doc.: IEEE /0088 Submission Ng for compressed beamforming feedback January, 2016 Slide 1 Date: Authors: Ron Porat, Broadcom, et. al. NameAffiliation AddressPhone Ron Porat Broadcom Sriram Venkateswaran Matthew Fischer Mingyue Ji Leo Montreuil Andrew Blanksby Vinko Erceg

doc.: IEEE /0088 Submission January, 2016 Slide 2 Authors (continued) Ron Porat, Broadcom, et. al. Robert Stacey Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA Shahrnaz Azizi Po-Kai Huang Qinghua Li Xiaogang Chen Chitto Ghosh Laurent Cariou Yaron Alpert Assaf Gurevitz Ilan Sutskover

doc.: IEEE /0088 Submission January, 2016 Slide 3 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Hongyuan Zhang Marvell 5488 Marvell Lane, Santa Clara, CA, Yakun Sun Lei Wang Liwen Chu Jinjing Jiang Yan Zhang Rui Cao Sudhir Srinivasa Bo Yu Saga Tamhane Mao Yu Xiayu Zheng Christian Berger Niranjan Grandhe Hui-Ling Lou

doc.: IEEE /0088 Submission January, 2016 Slide 4 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Alice Chen Qualcomm 5775 Morehouse Dr. San Diego, CA, USA Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA Bin Tian 5775 Morehouse Dr. San Diego, CA, USA Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian 5775 Morehouse Dr. San Diego, CA, USA Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA Lin Yang 5775 Morehouse Dr. San Diego, CA, USA Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands Naveen Kakani 2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA Raja Banerjea 1060 Rincon Circle San Jose CA 95131, USA Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands

doc.: IEEE /0088 Submission January, 2016 Slide 5 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Rolf De Vegt Qualcomm 1700 Technology Drive San Jose, CA 95110, USA Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA Tao Tian 5775 Morehouse Dr. San Diego, CA, USA Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA VK Jones 1700 Technology Drive San Jose, CA 95110, USA Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA

doc.: IEEE /0088 Submission January, 2016 Slide 6 Authors (continued) Ron Porat, Broadcom, et. al. Joonsuk Kim Apple Aon Mujtaba Guoqing Li Eric Wong Chris NameAffiliationAddressPhone James Yee Mediatek No. 1 Dusing 1 st Road, Hsinchu, Taiwan Alan Jauh Chingwa Hu m Frank Hsu Thomas Pare Mediatek USA 2860 Junction Ave, San Jose, CA 95134, USA ChaoChun Wang om James Wang Jianhan Liu Tianyu Wu Zhou Lan Russell Huang m

doc.: IEEE /0088 Submission January, 2016 Slide 7 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Peter Loc Huawei Le Liu F1-17, Huawei Base, Bantian, Shenzhen Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Yi Luo F1-17, Huawei Base, Bantian, Shenzhen Yingpei Lin 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Jiyong Pang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Zhigang Rong Telesis Court, Suite 365, San Diego, CA NA Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada David X. Yang F1-17, Huawei Base, Bantian, Shenzhen Yunsong Yang Telesis Court, Suite 365, San Diego, CA NA Junghoon Suh 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Edward Au 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Teyan Chen F1-17, Huawei Base, Bantian, Shenzhen Yunbo Li F1-17, Huawei Base, Bantian, Shenzhen

doc.: IEEE /0088 Submission January, 2016 Slide 8 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Jinmin Kim LG Electronics 19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea Kiseon Ryu Jinyoung Chun Jinsoo Choi Jeongki Kim Dongguk Lim Suhwook Kim Eunsung Park JayH Park HanGyu Cho Thomas DerhamOrange Bo Sun ZTE #9 Wuxingduan, Xifeng Rd., Xi'an, China Kaiying Lv Yonggang Fang Ke Yao Weimin Xing Brian Hart Cisco Systems 170 W Tasman Dr, San Jose, CA Pooya Monajemi

doc.: IEEE /0088 Submission January, 2016 Slide 9 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Fei Tong Samsung Innovation Park, Cambridge CB4 0DS (U.K.) Hyunjeong Kang Maetan 3-dong; Yongtong-Gu Suwon; South Korea Kaushik Josiam 1301, E. Lookout Dr, Richardson TX (972) Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) Rakesh Taori 1301, E. Lookout Dr, Richardson TX (972) Sanghyun Chang Maetan 3-dong; Yongtong-Gu Suwon; South Korea Yasushi Takatori NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa Japan Yasuhiko Inoue Shoko Shinohara Yusuke Asai Koichi Ishihara Junichi Iwatani Akira YamadaNTT DOCOMO 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, , Japan

doc.: IEEE /0088 Submission January, 2016 Slide 10 Authors (continued) Ron Porat, Broadcom, et. al. NameAffiliationAddressPhone Masahito Mori Sony Corp. Yusuke Yuichi Kazuyuki William

doc.: IEEE /0088 Submission Background In 11ax, the number of tones has quadrupled relative to 11ac (for the same BW) and with it potentially the severity of the FB overhead. Current IEEE spec framework states –The amendment shall define a mechanism to reduce the MIMO compressed beamforming feedback overhead –That mechanism shall use the compressed beamforming feedback as defined in section in ac as a baseline –In the IEEE September meeting we agreed that Ng = 1 won’t be used. In this contribution we investigate values of Ng greater than 1 for many channels, configurations, SU and MU and try to conclude on a set of Ng values that provides good balance between efficiency, performance and minimizing options January, 2016 Slide 11Ron Porat, Broadcom, et. al.

doc.: IEEE /0088 Submission Simulations January, 2016 Slide 12Ron Porat, Broadcom, et. al. Extensive simulations over many cases SU ‒ 4x1, 8x1, 8x2, 8x4 MU 4x1, 3 users, Nss = 1/user 8x1, 3 users, Nss = 1/user 8x1, 6 users, Nss = 1/user 8x2, 3 users, Nss = 2/user 8x2, 6 users, Nss = 1/user Channels considered: 11nB, 11nD, 11nE, UMi-LoS Full results in appendix, following two slides show sample results

doc.: IEEE /0088 Submission Results: Ng = 16 Useful in many SU cases and simpler MU cases January, 2016 Slide 13Ron Porat, Broadcom, et. al. SU: 8 antenna AP, 2 antenna STA, 11nD channel MU: 3 STAs each with 2 antennas, 8 antenna AP, 11nD channel Ng = 16 is optimal (or near optimal) in about 55% of the cases simulated

doc.: IEEE /0088 Submission Results: Ng = 4 Ng = 4 – used in more challenging SU and MU cases January, 2016 Slide 14Ron Porat, Broadcom, et. al. MU: 6 STAs each with 1 antenna, 8 antenna AP SU: 8 antenna AP, 4 antenna STA, 11nD channel Ng = 4 is optimal (or near optimal) in about 45% of the cases simulated

doc.: IEEE /0088 Submission Conclusion Investigated choices for tone grouping parameter Ng. Propose two values –Ng = 16: Achieves peak goodput for many SU cases and for the simpler MU cases (same overhead as 11ac Ng = 4) –Ng = 4: Suffices for the more challenging SU and MU cases and has same overhead as 11ac Ng = 1 In addition for MU, propose to feed back delta SNR on all tones where the V matrix is fed back –Unlike 11ac where delta SNR was fed back on half the tones used to feed back V –This prevents an effective Ng of 8 and 32 for delta SNR and simplifies the STA processing with very minimal increase in overhead January, 2016 Slide 15Ron Porat, Broadcom, et. al.

doc.: IEEE /0088 Submission SP #1 January, 2016 Slide 16Ron Porat, Broadcom, et al. Do you support adding to the TG Specification Framework: The compressed beamforming report shall support the following values for the tone grouping parameter Ng: Ng = 4 and Ng = 16 (Ng is referenced to the HE 4x payload tones). Yes No Abstain

doc.: IEEE /0088 Submission SP #2 January, 2016 Slide 17Ron Porat, Broadcom, et al. Do you support adding to the TG Specification Framework: In the MU Exclusive Beamforming Report for the delta SNR, the locations of the feedback tones shall be identical to the tone locations of the compressed V matrices fed back Yes No Abstain

doc.: IEEE /0088 Submission Appendix January, 2016 Slide 18Ron Porat, Broadcom, et. al.

doc.: IEEE /0088 Submission SU 4 x 1 January, 2016 Slide 19Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission SU 8 x 1 January, 2016 Slide 20Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission SU 8 x 2 January, 2016 Slide 21Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission SU 8 x 4 January, 2016 Slide 22Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission MU 4x1, 3 users January, 2016 Slide 23Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission MU 8x1, 3 users January, 2016 Slide 24Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission MU 8x1, 6 users January, 2016 Slide 25Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission MU 8x2, 3 users, Nss = 2/user January, 2016 Slide 26Ron Porat, Broadcom, et al.

doc.: IEEE /0088 Submission MU 8x2, 6 users January, 2016 Slide 27Ron Porat, Broadcom, et al.