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Acknowledgement to DL MU

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Presentation on theme: "Acknowledgement to DL MU"— Presentation transcript:

1 Acknowledgement to DL MU
Date: Name Affiliation Address Phone Liwen Chu Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 Lei Wang Jinjing Jiang Hongyuan Zhang Yakun Sun Yan Zhang Rui Cao Jie Huang Sudhir Srinivasa Saga Tamhane Mao Yu Edward Au Hui-Ling Lou Liwen Chu et al. (Marvell)

2 Authors (continues): Month Year Doc Title Liwen Chu et al. (Marvell)
Name Affiliation Address Phone Simone Merlin Qualcomm 5775 Morehouse Dr. San Diego, CA, USA Santosh Abraham Gwendolyn Barriac Cherian Gorge Alfred Asterjadhi Bin Tian 1700 Technology Drive San Jose, CA 95110, USA Carlos Aldana Hemanth Sampath Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands Richard Van Nee Rolf De Vegt Sameer Vermani Albert Van Zelst Tevfik Yucek   VK Jones Youhan Kim Liwen Chu et al. (Marvell) John Doe, Some Company

3 Authors (continued) Wookbong Lee Kiseon Ryu Jinyoung Chun
Name Affiliation Address Phone Wookbong Lee 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 Laurent cariou Orange Thomas Derham Liwen Chu et al. (Marvell)

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

5 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 et al. (Marvell)

6 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 et al. (Marvell)

7 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 Liwen Chu et al. (Marvell)

8 Authors (continued) Brian Hart Cisco Systems
Name Affiliation Address Phone 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 et al. (Marvell)

9 Overview of Trigger Frame Format
Unicast Trigger and broadcast Trigger frame are MAC control frames. Unicast Trigger and broadcast Trigger can be transmitted in DL OFDMA PPDU. [2] MPDU Delimiter is attached to the Trigger frame in such case. Common Info and Per STA Info are included in frame body of Trigger frame. 4 Common Info Per STA/Group Info Pad STA0’s Info or Group 0 Info …… STAn’s Info or Group m Info

10 DL OFDMA Frame Exchange Sequence
11ax allows DL OFDMA DL MU MIMO may be combined with DL OFDMA. STAs which are DL OFDMA receivers need to acknowledge the received frames if the AP ask for immediate Ack or BA. OFDMA acknowledge can decrease the acknowledge overhead Trigger frame or its simplification should be used for scheduling UL OFDMA acknowledgement. OFDMA BA AP’s (MU MIMO) A-MPDU with unicast Trigger to STA0, STA4, STA5 BA BA BA BA AP’s A-MPDU with unicast Trigger to STA3 Backoff or PIFS BA AP’s A-MPDU with unicast Trigger to STA2 BA AP’s A-MPDU with unicast Trigger to STA1 BA DL UL Primary 20MHz channel. TXOP

11 Simplified Trigger for UL OFDMA Acknowledgement
Month Year Doc Title Simplified Trigger for UL OFDMA Acknowledgement Unicast trigger frame can transmit schedule info for UL OFDMA data and acknowledgement from STAs. In DL OFDMA with short data frame, e.g. ~ 80-byte data PPDU in narrow resource unit (RU = subchannel), unicast trigger frame has bigger overhead. The simplified Trigger for OFDMA acknowledgement can decrease the overhead and should include the following scheduling information in the frame payload: RU Allocation includes start of the RU (start of 20MHz channel) and width of the RU. UL PPDU Length. MCS can be omitted since the AP and STA can figure out the same MCS by UL PPDU Length and RU Allocation The most robust MCS whose transmission time is shorter than UL PPDU Length can be selected. Other fields in Unicast trigger frame can also be saved when triggering UL OFDMA acknowledgement, e.g. AID, TC, Nsts are not needed for control frame. GI Mode, LTF Type/Num can be same as DL OFDMA. Bits: 9 TBD UL PPDU Length RU Allocation Marvell John Doe, Some Company

12 Simplified Trigger in MAC Header
Month Year Doc Title Simplified Trigger in MAC Header Putting the schedule information (frame body) of the simplified Trigger in MAC header uses less medium time than that used by separate Trigger. guarantee that a STA correctly receives schedule information when the STA needs to acknowledge the received frames. OFDMA ACK Trigger in MAC header OFDMA ACK Trigger in MAC Frame 12bits/symbol/26tones 27.2us 190.4us 24bits/symbol/26tones 13.6us 95.2us 48bits/symbol/26tones 6.8us 47.6us 4 2 6 or 0 6 ~3 4 Frame Control Duration A2 A1 Simplified Sched Info FCS OFDMA ACK Trigger ~3 Simplified Sched Info OFDMA ACK Trigger in MAC Header Marvell John Doe, Some Company

13 References [1] 802.11-15/0132-04-00ax-spec-framework
[2] ax- broadcast and unicast in DL MU Liwen Chu et al. (Marvell)

14 Straw Poll 1 Do you agree to add the following to the SFD?
The spec shall allow that the schedule information for OFDMA acknowledgement from STAs is contained in the MAC header of DL MPDU. Liwen Chu et al. (Marvell)

15 Straw Poll 2 Do you agree to add the following to the SFD?
The scheduling information content of OFDMA acknowledgement from STAs with the other scheduling information TBD: UL PPDU Length (9 bits) + RU Allocation (TBD). Liwen Chu et al. (Marvell)

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