Submission doc.: IEEE /1301r1 NAV Rule for UL MU Response Date: Slide 1 Authors: Nov 2015 Huawei Technologies NameAffiliationAddressPhone Jun Luo Huawei 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Yingpei Lin 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Peter Loc Yi Luo F1-17, Huawei Base, Bantian, Shenzhen Le Liu F1-17, Huawei Base, Bantian, Shenzhen 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

Submission doc.: IEEE /1301r1 Slide 2 Authors (continued) NameAffiliationAddressPhone Edward Au Huawei 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Teyan Chen F1-17, Huawei Base, Bantian, Shenzhen Yunbo Li F1-17, Huawei Base, Bantian, Shenzhen NameAffiliation AddressPhone Ron Porat Broadcom Sriram Venkateswaran Matthew Fischer Leo Montreuil Andrew Blanksby Vinko Erceg Nov 2015 Huawei Technologies NameAffiliationAddressPhone Masahito Mori Sony Corp. Yusuke Yuichi Kazuyuki William

Submission doc.: IEEE /1301r1 Slide 3 Authors (continued) Nov 2015 Huawei Technologies 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

Submission doc.: IEEE /1301r1 Slide 4 Authors (continued) Nov 2015 Huawei Technologies 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 Rolf De Vegt 1700 Technology Drive San Jose, CA 95110, USA Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA

Submission doc.: IEEE /1301r1 Slide 5 Authors (continued) Nov 2015 Huawei Technologies NameAffiliationAddressPhone Simone Merlin Qualcomm 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 NameAffiliationAddressPhone James Yee Mediatek No. 1 Dusing 1 st Road, Hsinchu, Taiwan Alan Jauh Chingwa Hu Frank Hsu Thomas Pare Mediatek USA 2860 Junction Ave, San Jose, CA 95134, USA ChaoChun Wang m James Wang Jianhan Liu Tianyu Wu Zhou Lan Russell Huang

Submission doc.: IEEE /1301r1 Slide 6 NameAffiliationAddressPhone Authors (continued) NameAffiliationAddressPhone Joonsuk Kim Apple Aon Mujtaba Guoqing Li Eric Wong Chris Nov 2015 Huawei Technologies 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

Submission doc.: IEEE /1301r1 Slide 7 Authors (continued) Nov 2015 Huawei Technologies 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

Submission doc.: IEEE /1301r1 Slide 8 Authors (continued) 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 Yamada NTT DOCOMO 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, , Japan Fujio Watanabe 3240 Hillview Ave, Palo Alto, CA com Haralabos Papadopoulos tions.com Nov 2015 Huawei Technologies

Submission doc.: IEEE /1301r1 Background and Recaps Slide 9 Nov 2015 The intra-BSS NAV operations of STA for responding to a trigger frame were discussed recently[1-2]. Motion passed on IEEE Sept 2015[1][3]: –A STA that is polled from a Trigger Frame for UL MU transmission considers the NAV in determining whether to respond unless one of the following conditions is met The NAV was set by a frame originating from the AP sending the trigger frame The response contains ACK/BA and the duration of the UL MU transmission is below a TBD threshold Other condition TBD NAV for the TXOP Trigger Frame(1-3) UL MU 1 AP STA UL MU 2 Trigger Frame(3-4) UL MU 3 UL MU 4 UL MU 3 STA 4 STA4’s NAV was set by AP’s TF TXOP STA4 can response TF with UL MU PPDU, as the NAV was set by AP Huawei Technologies

Submission doc.: IEEE /1301r1 NAV Setting by UL MU PPDU Slide 10 Nov 2015 Motion passed on IEEE Sept 2015[3][4]: HE-SIG-A shall include the following fields in an SU PPDU or MU DL/UL PPDU (the size of each field is TBD and other fields are TBD): –TXOP duration –…… The NAV of a STA can also be set by UL PPDUs from other intra-BSS STAs. Huawei Technologies

Submission doc.: IEEE /1301r1 Proposed Solution: UL Response Rule Slide 11 Nov 2015 In 11ax TXOP, if the NAV was set by an intra-BSS frame originating from other STAs(except for AP sending the trigger frame), A STA that is polled from a trigger frame for UL OFDMA transmission should also not consider the NAV in responding the trigger frame −STA4 missed the reception of the trigger frame to STA1-3(e.g. strong OBSS interference, or high MCS for TF), and was set NAV by UL MU PPDU from a closer STA3 NAV for the TXOP Trigger Frame(1-3) UL MU 1 AP STA UL MU 2 Trigger Frame(3-4) UL MU 3 UL MU 4 UL MU 3 STA 4 STA4’s NAV was set by STA3’s UL PPDU! TXOP STA4 missed the receiving of TF, and not set NAV by TF STA4 can response TF with UL MU PPDU, as the NAV was set by intra-BSS frame Huawei Technologies

Submission doc.: IEEE /1301r1 Summary Slide 12 Nov 2015 In the presentation, we propose the following UL MU response rule: −In 11ax TXOP, if the NAV was set by a frame originating from intra-BSS STAs, a STA that is polled from a trigger frame for UL OFDMA transmission should not consider the NAV in responding the trigger frame Huawei Technologies

Submission doc.: IEEE /1301r1 Straw Poll Do you agree to add the following underlining part to the TGax Specification Framework: –4.3 UL MU operation [802.11ax SFD] A STA that is polled from a Trigger frame for UL MU transmission considers the NAV in determining whether to respond unless one of the following conditions is met The NAV was set by a frame originating from the AP sending the trigger frame The response contains ACK/BA and the duration of the UL MU transmission is below a TBD threshold The NAV was set by a frame originating from intra-BSS STAs Other condition TBD −Y −N −A Slide 13 Nov 2015 Huawei Technologies

Submission doc.: IEEE /1301r1 Slide 14 Reference Nov 2015 [1] 11-15/1062r1 NAV Consideration for UL MU Response to Trigger frame [2] 11-15/1058r0 CCA consideration for UL MU transmission [3] 11-15/0132R9 Spec Framework [4] 11-15/1077r0 HE-SIG-A Content Huawei Technologies