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Doc.: IEEE 802.11-15/1137 Submission Triggered OFDMA Random Access Observations Date: 2015-09-11 Slide 1 Authors: NameAffiliationAddressPhoneEmail Russell.

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Presentation on theme: "Doc.: IEEE 802.11-15/1137 Submission Triggered OFDMA Random Access Observations Date: 2015-09-11 Slide 1 Authors: NameAffiliationAddressPhoneEmail Russell."— Presentation transcript:

1 doc.: IEEE 802.11-15/1137 Submission Triggered OFDMA Random Access Observations Date: 2015-09-11 Slide 1 Authors: NameAffiliationAddressPhoneEmail Russell Huang Mediatek USA 2860 Junction Ave, San Jose, CA 95134, USA +1-408-526-1899 thomas.pare@mediatek.com ChaoChun Wang chaochun.wang@mediatek.co m Tianyu Wu james.wang@mediatek.com Jianhan Liu Jianhan.Liu@mediatek.com James Wang tianyu.wu@mediatek.com Thomas Pare russell.huang@mediatek.com James Yee Mediatek No. 1 Dusing 1 st Road, Hsinchu, Taiwan +886-3-567-0766 james.yee@mediatek.com Alan Jauh alan.jauh@mediatek.com Chingwa Hu chinghwa.yu@mediatek.com Frank Hsu frank.hsu@mediatek.com Guoqing LI Apple 1 Infinite Loop Cupertino, CA 95014 USA +1-408-862-3055 guoqing_Li@apple.com Joonsuk Kim Joonsuk.kim@apple.com Eric Wong ericwong@apple.com Chris Hartman chartman@apple.com September 2015 Russell Huang, MediaTek

2 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 2 NameAffiliationAddressPhoneEmail Kazuyuki Sakoda Sony Electronics Kazuyuki.Sakoda@am.sony.co m Yusuke Tanaka YusukeC.Tanaka@jp.sony.com Eisuke Sakai Eisuke.Sakai@jp.sony.com Yuichi Morioka Yuichi.Morioka@jp.sony.com Masahito Mori Masahito.Mori@jp.sony.com Robert Stacey Intel 2111 NE 25th Ave, Hillsboro OR 97124, USA +1-503-724-893 robert.stacey@intel.com Po-Kai Huang po-kai.huang@intel.com 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 Laurent cariou laurent.cariou@intel.com Authors (continued) Russell Huang, MediaTek

3 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 3 NameAffiliationAddressPhoneEmail Yakun Sun Marvell 5488 Marvell Lane, Santa Clara, CA, 95054 408-222-2500 yakunsun@marvell.com Hongyuan Zhang hongyuan@marvell.com Lei Wang Leileiw@marvell.com Liwen Chu liwenchu@marvell.com Jinjing Jiang jinjing@marvell.com Yan Zhang yzhang@marvell.com Rui Cao ruicao@marvell.com Sudhir Srinivasa sudhirs@marvell.com Saga Tamhane sagar@marvell.com Mao Yu my@marvell..com Edward Au edwardau@marvell.com Hui-Ling Lou hlou@marvell.com Ron Porat Broadcom rporat@broadcom.com Matthew Fischer mfischer@broadcom.com Sriram Venkateswaran Leo Montreuil Andrew Blanksby Vinko Erceg Authors (continued) Russell Huang, MediaTek

4 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 4 NameAffiliationAddressPhoneEmail Peter Loc Huawei peterloc@iwirelesstech.com Le Liu F1-17, Huawei Base, Bantian, Shenzhen +86-18601656691 liule@huawei.com Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai jun.l@huawei.com Yi Luo F1-17, Huawei Base, Bantian, Shenzhen +86-18665891036 Roy.luoyi@huawei.com Yingpei Lin 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai linyingpei@huawei.com Jiyong Pang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai pangjiyong@huawei.com Zhigang Rong 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA zhigang.rong@huawei.com Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Rob.Sun@huawei.com David X. Yang F1-17, Huawei Base, Bantian, Shenzhen david.yangxun@huawei.com Yunsong Yang 10180 Telesis Court, Suite 365, San Diego, CA 92121 NA yangyunsong@huawei.com Zhou Lan F1-17, Huawei Base, Bantian, SHenzhen +86-18565826350 Lanzhou1@huawei.com Junghoon Suh 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada Junghoon.Suh@huawei.com Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai +86-18601656691 zhangjiayin@huawei.com Authors (continued) Russell Huang, MediaTek

5 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 5 NameAffiliationAddressPhoneEmail Albert Van Zelst Qualcomm Straatweg 66-S Breukelen, 3621 BR Netherlands allert@qti.qualcomm.com Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA aasterja@qti.qualcomm.com Bin Tian 5775 Morehouse Dr. San Diego, CA, USA btian@qti.qualcomm.com Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA caldana@qca.qualcomm.com George Cherian 5775 Morehouse Dr. San Diego, CA, USA gcherian@qti.qualcomm.com Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA gbarriac@qti.qualcomm.com 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 Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA smerlin@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 Authors (continued) Russell Huang, MediaTek

6 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 6 Authors (continued) NameAffiliationAddressPhoneEmail Thomas DerhamOrange thomas.derham@orange.com Brian Hart Cisco Systems 170 W Tasman Dr, San Jose, CA 95134 brianh@cisco.com Pooya Monajemi pmonajem@cisco.com Russell Huang, MediaTek

7 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 7 Authors (continued) NameAffiliationAddressPhoneEmail Fei Tong Samsung Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434633 f.tong@samsung.com Hyunjeong Kang Maetan 3-dong; Yongtong-Gu Suwon; South Korea +82-31-279-9028 hyunjeong.kang@samsung.com Kaushik Josiam 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7437 k.josiam@samsung.com Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434600 m.rison@samsung.com Rakesh Taori 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7470 rakesh.taori@samsung.com Sanghyun Chang Maetan 3-dong; Yongtong-Gu Suwon; South Korea +82-10-8864-1751 s29.chang@samsung.com Yasushi Takatori NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan takatori.yasushi@lab.ntt.co.jp Yasuhiko Inoue inoue.yasuhiko@lab.ntt.co.jp Yusuke Asai asai.yusuke@lab.ntt.co.jp Koichi Ishihara ishihara.koichi@lab.ntt.co.jp Akira Kishida kishida.akira@lab.ntt.co.jp Akira Yamada NTT DOCOMO 3-6, Hikarinooka, Yokosuka- shi, Kanagawa, 239-8536, Japan yamadaakira@nttdocomo.com Fujio Watanabe 3240 Hillview Ave, Palo Alto, CA 94304 watanabe@docomoinnovations. com Haralabos Papadopoulos hpapadopoulos@docomoinnova tions.com Russell Huang, MediaTek

8 doc.: IEEE 802.11-15/1137 Submission September 2015 Slide 8 NameAffiliationAddressPhoneEmail Kiseon Ryu LG Electronics 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-130, Korea kiseon.ryu@lge.com Jinyoung Chun jiny.chun@lge.com Jinsoo Choi js.choi@lge.com Jeongki Kim jeongki.kim@lge.com 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 Bo Sun ZTE #9 Wuxing duan, Xifeng Rd, Xi’an, China Sub.bo1@zte.com.cn Kaiying Lv lv.kaiying@zte.com.cn Yonggang Fang yfang@ztetx.com Ke Yao Yao.ke5@zte.com.cn Weimin Xing Xing.weimin@zte.com.cn Authors (continued) Russell Huang, MediaTek

9 doc.: IEEE 802.11-15/1137 Submission Overview of the Triggered OFDMA Random Access STAs start UL MU operation after AP sends the trigger frames For random access cases, STAs randomly access an RU by using a certain randomization algorithm. Efficiency is one of the metrics to justify the OFDMA random access mechanisms. –Efficiency = number of resource units with successful transmission/all resource units Slide 9 September 2015 Russell Huang, MediaTek

10 doc.: IEEE 802.11-15/1137 Submission Review - CSMA vs. Slotted ALOHA Slide 10 Random access can be CSMA or slotted ALOHA CSMA/CA has better efficiency than slotted ALOHA. –Reason: CSMA uses a much smaller slot (different than slotted ALOHA’s slot) to do the carrier sensing before transmission. Using CSMA for MU OFDMA on UL complicates the receiver design. –STAs transmitting at different time in separate sub-channels is a hard problem for the design of the AP’s receiver. Slotted ALOHA in OFDMA random access. –Packets are transmitted in RUs randomly selected by STAs –With traffic following Poisson arrival, the throughput is Ge -G. (P(k=1) = λ k e - λ /k!). The optimal value is.368 September 2015 Russell Huang, MediaTek

11 doc.: IEEE 802.11-15/1137 Submission To Achieve The Best Efficiency Slide 11 Efficiency depends on the traffic load. Usually randomization is used to tune the traffic load. –36.8% of efficiency is acceptable as long as the system can achieve it consistently. Randomization approaches to tuning the traffic –Backoff mechanism (backoff counter picked in the range of 0 and CW) [1] –Transmission probability control –Etc. Overall traffic and collisions status information in OFDMA random access is difficult for individual STAs to obtain, but easy for AP. With traffic estimation, AP can determine the optimal value of the traffic tuning parameter so that optimal efficiency can be achieved. September 2015 Russell Huang, MediaTek

12 doc.: IEEE 802.11-15/1137 Submission Randomization Parameter Broadcasting Slide 12 AP broadcasts the randomization parameter(s) to the STAs, which can be –Contention window size –Transmission probability –Etc. The AP can broadcast it in –Beacons, less overhead –Trigger frame, more adaptive We propose AP broadcast the parameter(s) in the trigger frame. September 2015 Russell Huang, MediaTek

13 doc.: IEEE 802.11-15/1137 Submission Do you support to let AP broadcast a TBD parameter in the trigger frame to the STAs so that STAs can initiate the random access process after the trigger frames? –Yes –No –Abs Strawpoll 1 Slide 13 September 2015 Russell Huang, MediaTek

14 doc.: IEEE 802.11-15/1137 Submission [1] UL OFDMA-based Random Access Procedure, doc.: IEEE 802.11-15/1105r0 Reference Slide 14 September 2015 Russell Huang, MediaTek

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