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MAC Padding in Trigger Frame

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Presentation on theme: "MAC Padding in Trigger Frame"— Presentation transcript:

1 MAC Padding in Trigger Frame
Date: Authors: Name Affiliation Address Phone Liwen Chu Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 Jinjing Jiang Lei Wang Hongyuan Zhang Yakun Sun Yan Zhang Rui Cao Bo Yu Sudhir Srinivasa Saga Tamhane Mao Yu Edward Au Hui-Ling Lou Liwen Chu (Marvell), et. al.

2 Authors (continued) Albert Van Zelst Alfred Asterjadhi Arjun Bharadwaj
Name Affiliation Address Phone Albert Van Zelst Qualcomm Straatweg 66-S Breukelen, 3621 BR Netherlands Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA Arjun Bharadwaj Bin Tian Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian Gwendolyn Barriac Hemanth Sampath Menzo Wentink Richard Van Nee Rolf De Vegt Sameer Vermani Simone Merlin Tevfik Yucek   VK Jones Youhan Kim Liwen Chu (Marvell), et. al.

3 Authors (continued) Robert Stacey Intel
Name Affiliation Address Phone Robert Stacey Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA      Eldad Perahia Shahrnaz Azizi Po-Kai Huang Qinghua Li Xiaogang Chen Chitto Ghosh Laurent cariou Rongzhen Yang Ron Porat Broadcom Matthew Fischer Sriram Venkateswaran Zhou Lan Leo Montreuil Andrew Blanksby Vinko Erceg Liwen Chu (Marvell), et. al.

4 Authors (continued) James Yee Mediatek
Name Affiliation Address Phone James Yee Mediatek No. 1 Dusing 1st Road, Hsinchu, Taiwan   Alan Jauh Chingwa Hu Frank Hsu Thomas Pare USA 2860 Junction Ave, San Jose, CA 95134, USA ChaoChun Wang James Wang Jianhan Liu Tianyu Wu Russell Huang Joonsuk Kim Apple Aon Mujtaba   Guoqing Li Eric Wong Chris Hartman Liwen Chu (Marvell), et. al.

5 Authors (continued) Phillip Barber Peter Loc Le Liu Jun Luo Huawei
Name Affiliation Address Phone Phillip Barber Huawei The Lone Star State, TX Peter Loc Le Liu F1-17, Huawei Base, Bantian, Shenzhen Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Yi Luo Yingpei Lin Jiyong Pang Zhigang Rong 10180 Telesis Court, Suite 365, San Diego, CA  NA Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada David X. Yang Yunsong Yang Zhou Lan F1-17, Huawei Base, Bantian, SHenzhen Junghoon Suh Jiayin Zhang Liwen Chu (Marvell), et. al.

6 Authors (continued) Hyeyoung Choi LG Electronics
Name Affiliation Address Phone Hyeyoung Choi LG Electronics 19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea Kiseon Ryu Jinyoung Chun Jinsoo Choi Jeongki Kim Giwon Park Dongguk Lim Suhwook Kim Eunsung Park HanGyu Cho Thomas Derham Orange Brian Hart Cisco Systems 170 W Tasman Dr, San Jose, CA 95134 Pooya Monajemi Bo Sun ZTE #9 Wuxingduan, Xifeng Rd., Xi'an, China Kaiying Lv Yonggang Fang Ke Yao Weimin Xing Liwen Chu (Marvell), et. al.

7 Authors (continued) Fei Tong Hyunjeong Kang Samsung Kaushik Josiam
Name Affiliation Address Phone 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 75070 (972) Mark Rison Rakesh Taori (972) Sanghyun Chang Yasushi Takatori NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa Japan Yasuhiko Inoue Yusuke Asai Koichi Ishihara Akira Kishida Akira Yamada NTT DOCOMO 3-6, Hikarinooka, Yokosuka-shi, Kanagawa, , Japan Fujio Watanabe 3240 Hillview Ave, Palo Alto, CA 94304 Haralabos Papadopoulos Liwen Chu (Marvell), et. al.

8 Recap of UL OFDMA Frame Exchange
A legacy duplicated Trigger frame or HE Trigger is transmitted to trigger a UL OFDMA/MU-MIMO frame exchange. TBD IFS after the end of Trigger PPDU, STAs transmit UL MU frames. OFDMA or broadcast acknowledge DL Trigger Trigger STA1 A-MPDU to AP BlkAck Trigger STA2 A-MPDU to AP BlkAck Trigger BlkAck STA3 A-MPDU to AP Trigger STA’s time for UL OFDMA TX preparation OFDMA Frame Exchange Slide 8 Liwen Chu (Marvell), et. al.

9 Consideration of IFS between TF and UL MU PPDU
Month Year Doc Title Consideration of IFS between TF and UL MU PPDU As proposed in [1], MU carry sensing is done after Trigger frame or DL MU that contain Trigger frames. Inter-frame space should satisfy the following conditions: long enough for the responding STA to prepare the UL data. long enough for the responding STA to sense the allocated channel, if the CS is considered before the UL MU transmission in response to a Trigger frame. No risk for other STAs to contend the medium. Carrier Sense (CS) AP Gains the channel access DL UL DL Trigger UL MU PPDU ACK /BA IFS ?? TXOP Liwen Chu (Marvell), et. al. John Doe, Some Company

10 SIFS between TF and UL MU PPDU
Month Year Doc Title SIFS between TF and UL MU PPDU As proposed in [1], MU carrier sensing is done after Trigger frame. SIFS between Trigger and UL MU PPDU should be used since: SIFS is of sufficient duration to allow for energy detection. Longer than SIFS may not be safe from medium access perspective. SIFS time seems tight for some implementations: e.g. power control, BW in L-STF field. Carrier Sense (CS) AP Gains the channel access DL UL DL Trigger UL MU PPDU ACK /BA SIFS TXOP Liwen Chu (Marvell), et. al. John Doe, Some Company

11 Liwen Chu (Marvell), et. al.
Trigger Padding For legacy dup Trigger PPDU, propose to add padding before FCS of the Trigger frame HE STAs able to converge Viterbi for useful bits before the end of airtime of the padded PPDU. Legacy STAs decode the frame until the end of the FCS based on PHY SIG length value. Legacy STAs can set NAV correctly. The padding detail is TBD. Length indicated by PHY SIG Frame Control Duration/ID Common Info Per STA/Group Info SERVICE RA TA Padding FCS Enough Time for Viterbi Trace back Liwen Chu (Marvell), et. al.

12 Liwen Chu (Marvell), et. al.
Summary Propose SIFS between Trigger (DL MU with Trigger frames) and UL MU transmission. Provide a simple padding mechanism for Trigger PPDU. Buy sufficient time for STAs to respond Trigger. No impact on legacy devices. Liwen Chu (Marvell), et. al.

13 Liwen Chu (Marvell), et. al.
References [1] 11-16/0031r0 UL MU CS rules [2] Draft P802.11REVmc_D5.0 Liwen Chu (Marvell), et. al.

14 Liwen Chu (Marvell), et. al.
Straw Poll 1 Do you agree to add the following text in Section 4.3 of the SFD: The inter frame space between a PPDU that contains a trigger frame and its triggered UL MU PPDU is SIFS Liwen Chu (Marvell), et. al.

15 Straw Poll 2 Do you agree to add the following text to the SFD?
The specs shall define a MAC padding scheme (TBD) for trigger frame sent in Non-HT PPDUs Liwen Chu (Marvell), et. al. Liwen Chu (Marvell), et. al.

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