Duration and MAC Padding for UL MU PPDU in IEEE 802.11-15
Explore the study on Duration and MAC Padding for UL MU PPDU in IEEE 802.11-15 conducted by a group of authors from various affiliations such as Qualcomm, Marvell, LG Electronics, Broadcom, Intel, and Orange. The research delves into the intricacies of wireless communication technology, providing valuable insights for industry professionals and researchers alike.
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doc.: IEEE 802.11-15/0617r0 Duration and MAC Padding for UL MU PPDUs Date: 2015-05-10 Authors: Gang Ding 5775 Morehouse Dr. San Diego, CA, USA gding@qti.qualcomm.com Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA smerlin@qti.qualcomm.com George Cherian 5775 Morehouse Dr. San Diego, CA, USA gcherian@qti.qualcomm.com Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA aasterja@qti.qualcomm.com Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA gbarriac@qti.qualcomm.com Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA caldana@qca.qualcomm.com Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands allert@qti.qualcomm.com Bin Tian 5775 Morehouse Dr. San Diego, CA, USA btian@qti.qualcomm.com Qualcomm Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA hsampath@qti.qualcomm.com Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands mwentink@qti.qualcomm.com Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands rvannee@qti.qualcomm.com Rolf De Vegt 1700 Technology Drive San Jose, CA 95110, USA rolfv@qca.qualcomm.com Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA svverman@qti.qualcomm.com Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA tyucek@qca.qualcomm.com VK Jones 1700 Technology Drive San Jose, CA 95110, USA vkjones@qca.qualcomm.com Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA youhank@qca.qualcomm.com Submission Slide 1 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email Liwen Chu hongyuan@marvell.com Lei Wang yakunsun@marvell.com Jinjing Jiang Leileiw@marvell.com Hongyuan Zhang liwenchu@marvell.com Yakun Sun jinjing@marvell.com Yan Zhang yzhang@marvell.com 5488 Marvell Lane, Santa Clara, CA, 95054 Rui Cao Marvell 408-222-2500 ruicao@marvell.com Jie Huang jiehuang@marvell.com Sudhir Srinivasa sudhirs@marvell.com Saga Tamhane sagar@marvell.com Mao Yu my@marvel..com Edward Au edwardau@marvell.com Hui-Ling Lou hlou@marvell.com Submission Slide 2 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email Wookbong Lee wookbong.lee@lge.com Kiseon Ryu kiseon.ryu@lge.com Jinyoung Chun jiny.chun@lge.com Jinsoo Choi js.choi@lge.com 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137- 130, Korea Jeongki Kim jeongki.kim@lge.com LG Electronics Giwon Park giwon.park@lge.com Dongguk Lim dongguk.lim@lge.com Suhwook Kim suhwook.kim@lge.com Eunsung Park esung.park@lge.com HanGyu Cho hg.cho@lge.com Laurent cariou Laurent.cariou@orange.com Orange Thomas Derham thomas.derham@orange.com Submission Slide 3 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email Ron Porat rporat@broadcom.com Matthew Fischer Sriram Venkateswaran Tu Nguyen mfischer@broadcom.com Broadcom Vinko Erceg Robert Stacey robert.stacey@intel.com Eldad Perahia eldad.perahia@intel.com Shahrnaz Azizi shahrnaz.azizi@intel.com 2111 NE 25th Ave, Hillsboro OR 97124, USA Po-Kai Huang po-kai.huang@intel.com +1-503-724-893 Intel Qinghua Li quinghua.li@intel.com Xiaogang Chen xiaogang.c.chen@intel.com Chitto Ghosh chittabrata.ghosh@intel.com Rongzhen Yang rongzhen.yang@intel.com Submission Slide 4 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Innovation Park, Cambridge CB4 0DS (U.K.) Maetan 3-dong; Yongtong-Gu Suwon; South Korea 1301, E. Lookout Dr, Richardson TX 75070 Innovation Park, Cambridge CB4 0DS (U.K.) 1301, E. Lookout Dr, Richardson TX 75070 Maetan 3-dong; Yongtong-Gu Suwon; South Korea Phone Email Fei Tong f.tong@samsung.com +44 1223 434633 Hyunjeong Kang hyunjeong.kang@samsung.com +82-31-279-9028 Kaushik Josiam k.josiam@samsung.com (972) 761 7437 Samsung Mark Rison m.rison@samsung.com +44 1223 434600 Rakesh Taori rakesh.taori@samsung.com (972) 761 7470 Sanghyun Chang s29.chang@samsung.com +82-10-8864-1751 Yasushi Takatori takatori.yasushi@lab.ntt.co.jp Yasuhiko Inoue inoue.yasuhiko@lab.ntt.co.jp 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan Yusuke Asai NTT asai.yusuke@lab.ntt.co.jp Koichi Ishihara ishihara.koichi@lab.ntt.co.jp Akira Kishida kishida.akira@lab.ntt.co.jp 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, 239-8536, Japan Akira Yamada yamadaakira@nttdocomo.com watanabe@docomoinnovations. com hpapadopoulos@docomoinnova tions.com Fujio Watanabe NTT DOCOMO 3240 Hillview Ave, Palo Alto, CA 94304 Haralabos Papadopoulos Submission Slide 5 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email pbarber@broadbandmobilete ch.com peterloc@iwirelesstech.com Phillip Barber The Lone Star State, TX Peter Loc F1-17, Huawei Base, Bantian, Shenzhen 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai F1-17, Huawei Base, Bantian, Shenzhen 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada F1-17, Huawei Base, Bantian, Shenzhen 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA F1-17, Huawei Base, Bantian, SHenzhen 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai Le Liu liule@huawei.com +86-18601656691 Jun Luo jun.l@huawei.com Yi Luo Roy.luoyi@huawei.com +86-18665891036 Yingpei Lin linyingpei@huawei.com Jiyong Pang pangjiyong@huawei.com Huawei Zhigang Rong zhigang.rong@huawei.com Rob Sun Rob.Sun@huawei.com David X. Yang david.yangxun@huawei.com Yunsong Yang yangyunsong@huawei.com Zhou Lan Lanzhou1@huawei.com +86-18565826350 Junghoon Suh Junghoon.Suh@huawei.com Jiayin Zhang zhangjiayin@huawei.com +86-18601656691 Submission Slide 6 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email No. 1 Dusing 1st Road, Hsinchu, Taiwan James Yee +886-3-567-0766 james.yee@mediatek.com Alan Jauh alan.jauh@mediatek.com chinghwa.yu@mediatek.co m frank.hsu@mediatek.com Mediatek Chingwa Hu Frank Hsu 2860 Junction Ave, San Jose, CA 95134, USA Thomas Pare +1-408-526-1899 thomas.pare@mediatek.com chaochun.wang@mediatek.c om james.wang@mediatek.com ChaoChun Wang James Wang Mediatek USA Jianhan Liu Jianhan.Liu@mediatek.com Tianyu Wu tianyu.wu@mediatek.com russell.huang@mediatek.co m Russell Huang Submission Slide 7 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Authors (continued) Name Affiliation Address Phone Email 170 W Tasman Dr, San Jose, CA 95134 Brian Hart brianh@cisco.com Cisco Systems Pooya Monajemi pmonajem@cisco.com #9 Wuxingduan, Xifeng Rd., Xi'an, China Bo Sun sun.bo1@zte.com.cn Kaiying Lv lv.kaiying@zte.com.cn ZTE Yonggang Fang yfang@ztetx.com Ke Yao yao.ke5@zte.com.cn Weimin Xing xing.weimin@zte.com.cn Joonsuk Kim Cupertino, CA joonsuk@apple.com +1-408-974-5967 Aon Mujtaba mujtaba@apple.com Guoqing Li Apple guoqing_li@apple.com Eric Wong ericwong@apple.com Chris Hartman chartman@apple.com Submission Slide 8 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Introduction The TGax SFD [1] incudes initial specifications for the UL MU OFDMA/MIMO MAC protocol An UL MU PPDU (MU-MIMO or OFDMA) is sent as an immediate response (IFS TBD) to a Trigger frame (format TBD) sent by the AP. [MAC Motion #3, March 2015] The amendment shall include a mechanism to multiplex BA/ACK responses to DL MU transmission. From [2]: Acknowledge frame Trigger frame AP AP STA STA1 1 UL MU PPDU Spatial domain Frequency/ STA STA2 2 UL MU PPDU STA STA3 3 UL MU PPDU STA STA4 4 UL MU PPDU This presentation discusses the duration of UL MU OFDMA PPDUs and the need for padding Submission Slide 9 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Proposal for UL OFDMA UL OFDMA PPDU STA1 Pad Freq. BAs TF PPDU STA 2 Time duration The Trigger Frame indicates the duration of the UL OFDMA Each STA transmits an UL OFDMA PPDU of the duration indicated by the Trigger If a STA does not have enough data to fill the available PSDU bytes, then the MAC adds A-MPDU padding as defined in .11ac specifications for DL MU MIMO While A-MPDU_length < PSDU_LENGTH and A-MPDU_Length mod 4 0, add a subframe pad octect and increment A-MPDU_Length by 1. While A-MPDU_length + 4 PSDU_LENGTH, add an A-MPDU EOF subframe and increment A-MPDU_Length by 4. (EOF subframe has Length field = 0 and EOF field = 1) While A-MPDU_length < PSDU_LENGTH, add an EOF pad octet and increment A- MPDU_Length by 1 Submission Slide 10 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Motivations Each channel occupied by the UL OFDMA PPDU should be maintained busy for the time indicated by AP If a STA was allowed to end its transmission earlier, the unused sub-channel could be acquired by an OBSS STA, which may initiate a transmissions, potentially resulting in: Interference with the following DL BAs Immediate BA not possible for STAs that terminated earlier Corrupted reception of the remaining UL MU PPDUs due to interference at the AP In particular, the primary channel should not be left unused while other STAs are completing the UL MU PPDU transmission on secondary channels The virtual protection provided by trigger frame (NAV) or UL MU PPDU PHY preamble (deferral for the PPDU duration) is not fully reliable against OBSS [3] Submission Slide 11 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Conclusions For UL OFDMA we propose: UL MU PPDUs from all the STAs shall end at the time duration indicated by AP Same MAC padding rules as in 11ac DL MU MIMO can be used Submission Slide 12 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Straw poll 1 Would you agree to add the following text to the SFD: UL OFDMA PPDUs shall end at the time indicated in trigger frame, by adding padding if necessary Submission Slide 13 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 Straw poll 2 Would you agree to add the following text to the SFD: The MAC padding for UL MU OFDMA PPDUs is done by using the 11ac A-MPDU padding procedure Submission Slide 14 G. Ding et al, Qualcomm
doc.: IEEE 802.11-15/0617r0 References [1] 11-15-0132-04-00ax-spec-framework.docx [2] 11-15-0365-00-00ax-ul-mu-procedure.pptx [3] 11-15-0367-00-00ax-obss-preamble-detection.ppt Submission Slide 15 G. Ding et al, Qualcomm
