Identifiers in HE PPDUs for Power Saving Study
Explore the study on identifiers in HE PPDUs for power saving conducted in September 2015 by various authors from Qualcomm, LG Electronics, Intel, Broadcom, Marvell, and Mediatek. The document discusses enhancements related to power saving mechanisms in wireless communication standards.
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September 2015 doc.: IEEE 802.11-15/1122r0 Identifiers in HE PPDUs for power saving Date: 2015-09-12 Authors: Alfred Asterjadhi 5775 Morehouse Dr. San Simone Merlin Name Affiliation Address Phone email aasterja@qti.qualcomm.com smerlin@qti.qualcomm.com Diego, CA, USA Bin Tian btian@qti.qualcomm.com 1700 Technology Drive San Jose, CA 95110, USA Carlos Aldana caldana@qca.qualcomm.com George Cherian gcherian@qti.qualcomm.com 5775 Morehouse Dr. San Diego, CA, USA Gwendolyn Barriac gbarriac@qti.qualcomm.com Hemanth Sampath hsampath@qti.qualcomm.com Menzo Wentink mwentink@qti.qualcomm.com Qualcomm Straatweg 66-S Breukelen, 3621 BR Netherlands Richard Van Nee rvannee@qti.qualcomm.com Albert Van Zelst allert@qti.qualcomm.com 1700 Technology Drive San Jose, CA 95110, USA 5775 Morehouse Dr. San Diego, CA, USA Rolf De Vegt rolfv@qca.qualcomm.com Sameer Vermani svverman@qti.qualcomm.com Tevfik Yucek tyucek@qca.qualcomm.com 1700 Technology Drive San Jose, CA 95110, USA VK Jones vkjones@qca.qualcomm.com Youhan Kim youhank@qca.qualcomm.com 1 Submission Slide 1 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Authors (continued): Name Affiliation Address 19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-130, Korea Phone email Kiseon Ryu kiseon.ryu@lge.com Hyeyouong Choi hy0117.choi@lge.com Jinyoung Chun jiny.chun@lge.com Jinsoo Choi js.choi@lge.com 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 Jinmin Kim jinmin1230.kim@lge.com 2200 Mission College Blvd, Santa Clara, CA 95054 2111 NE 25th Ave, Hillsboro OR 97124, USA Shahrnaz Azizi shahrnaz.azizi@intel.com Eldad Perahia eldad.perahia@intel.com Robert Stacey +1-503-724-893 robert.stacey@intel.com Po-Kai Huang po-kai.huang@intel.com Intel Qinghua Li quinghua.li@intel.com Xiaogang Chen xiaogang.c.chen@intel.com Chittabrata Ghosh chittabrata.ghosh@intel.com Rongzhen Yang rongzhen.yang@intel.com Laurent cariou laurent.cariou@intel.com 1 Submission Slide 2 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Authors (continued) Name Affiliation Address Phone email Ron Porat rporat@broadcom.com Matthew Fischer mfischer@broadcom.com Sriram Broadcom Venkateswaran Tu Nguyen Vinko Erceg 5488 Marvell Lane, Santa Clara, CA, 95054 Lei Wang 858-205-7286 Leileiw@marvell.com Hongyuan Zhang hongyuan@marvell.com Yakun Sun yakunsun@marvell.com Liwen Chu liwenchu@marvell.com Jinjing Jiang jinjing@marvell.com Marvell Yan Zhang yzhang@marvell.com Rui Cao ruicao@marvell.com Sudhir Srinivasa sudhirs@marvell.com Saga Tamhane sagar@marvell.com Mao Yu my@marvel..com Edward Au edwardau@marvell.com Hui-Ling Lu hlou@marvell.com Submission Slide 3 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 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 Mediatek Chingwa Hu chinghwa.yu@mediatek.com Frank Hsu frank.hsu@mediatek.com 2860 Junction Ave, San Jose, CA 95134, USA `Thomas Pare +1-408-526-1899 thomas.pare@mediatek.com chaochun.wang@mediatek.co m ChaoChun Wang James Wang james.wang@mediatek.com Mediatek USA Jianhan Liu Jianhan.Liu@mediatek.com Tianyu Wu tianyu.wu@mediatek.com Russell Huang russell.huang@mediatek.com ` Submission Slide 4 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Authors (continued) Name Affiliation Address Phone email pbarber@broadbandmobilete ch.com Phillip Barber The Lone Star State, TX Peter Loc peterloc@iwirelesstech.com 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 +86-18601656691 liule@huawei.com Jun Luo jun.l@huawei.com Yi Luo +86-18665891036 Roy.luoyi@huawei.com 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 +86-18565826350 Lanzhou1@huawei.com Junghoon Suh Junghoon.Suh@huawei.com Jiayin Zhang +86-18601656691 zhangjiayin@huawei.com Submission Slide 5 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Authors (continued) Name Affiliation Address Phone email Thomas Derham Orange thomas.derham@orange.com 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan Yasushi Takatori takatori.yasushi@lab.ntt.co.jp Yasuhiko Inoue inoue.yasuhiko@lab.ntt.co.jp NTT Yusuke Asai 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 yamadaakira@nttdocomo.co m Akira Yamada NTT 3240 Hillview Ave, Palo Alto, CA 94304 watanabe@docomoinnovatio ns.com DOCOMO Fujio Watanabe Haralabos Papadopoulos hpapadopoulos@docomoinno vations.com Innovation Park, Cambridge CB4 0DS (U.K.) Fei Tong +44 1223 434633 f.tong@samsung.com Maetan 3-dong; Yongtong-Gu Suwon; South Korea hyunjeong.kang@samsung.co m Hyunjeong Kang +82-31-279-9028 1301, E. Lookout Dr, Richardson TX 75070 Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434600 1301, E. Lookout Dr, Richardson TX 75070 Kaushik Josiam (972) 761 7437 k.josiam@samsung.com Samsung Mark Rison m.rison@samsung.com Rakesh Taori (972) 761 7470 rakesh.taori@samsung.com Maetan 3-dong; Yongtong-Gu Suwon; South Korea +82-10-8864- 1751 Sanghyun Chang s29.chang@samsung.com Submission Alfred Asterjadhi, et. al. Slide 6
September 2015 doc.: IEEE 802.11-15/1122r0 Authors (continued) Name Affiliation Address Phone email #9 Wuxingduan, Xifeng Rd Xian, China Bo Sun sun.bo1@zte.com.cn Kaiying Lv lv.kaiying@zte.com.cn Yonggang Fang ZTE Ke Yao Weimin Xing 170 W Tasman Dr, San Jose, CA 95134 Brian Hart brianh@cisco.com Cisco Systems Pooya Monajemi pmonajem@cisco.com Joonsuk Kim joonsuk@apple.com Aon Mujtaba mujtaba@apple.com Guoqing Li Apple guoqing_li@apple.com Eric Wong ericwong@apple.com Chris Hartman chartman@apple.com Submission Slide 7 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Introduction Currently, PHY is discussing populating SIG-A and SIG-B An identifier of the BSS (e.g., BSS COLOR) is proposed in SIG-A that is Beneficial for spatial reuse as discussed in [1] Beneficial for power save as discussed in this presentation Other identifiers, such as the (set) receiver(s) is likely to be present in the SIG-B field of HE DL MU PPDUs However, it is not clear whether it will be present in the other cases In addition to the BSS COLOR field, we propose SIG-A to contain an UL/DL Flag field to: Enable intra-PPDU power saving Submission Slide 8 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Proposed Identifiers in PHY header Legacy Preamble (L-SIG) PSDU HE Preamble ((A-)MPDU) (RL-SIG, SIG-A, SIG-B, ) Identifiers: COLOR, RA, TA, BSS COLOR field is proposed for the SIG-A field of an HE PPDU The BSS COLOR contains a non-unique value that identifies the BSS All HE PPDUs generated by BSS s members have same value A STA that receives an HE PPDU with a BSS COLOR equal to its BSS classifies it as a member PPDU Otherwise, it classifies it as a nonmember PPDU UL/DL Flag field is proposed for the SIG-A field of an HE PPDU: The UL/DL Flag indicates whether the frame is Uplink or Downlink Submission Slide 9 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Considerations on power save PS state as known at AP (Awake) Awake STA 1 state Doze UL PPDU STA 7 BSS Activity DL PPDU STA 4 UL PPDU STA 2 DL PPDU STA 2 DL PPDU STA 1 UL PPDU DL PPDU OBSS Activity A non-AP STA that has declared to its AP to be in Awake state Can go to sleep for a duration of time only if: The AP is not going to transmit a frame to that STA during that duration of time E.g., the AP is busy communicating exclusively with other devices For the purpose of this proposal we focus on intra-PPDU power save After decoding the PHY header of a PPDU, the STA can sleep for the PSDU duration only if The PPDU is a member PPDU and is not intended for the STA Hence, the non-AP STA is not allowed to sleep for the duration of a PSDU that: Is contained in a non-member PPDU Is contained in a member PPDU intended for the STA Submission Slide 10 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Can BSS COLOR alone enable intra-PPDU PS? HE Preamble Legacy Preamble (L-SIG) PSDU (RL-SIG, SIG-A, SIG-B, ) ((A-)MPDU) Sleep if member-PPDU Identifiers: COLOR, RA, TA, PPDU intended to non-AP STA Assuming that only the BSS COLOR field is available in the PHY header: The STA could go to sleep only if the received frame is a non-member PPDU But by doing so it could end up sleeping while the AP happens to transmit to it, missing the frame! In general, it is not a good idea to do so as it increases transmission failures In addition, BSS COLOR does not differentiate if the PPDU is intended to the STA Hence, the STA cannot go to sleep during the PSDUs that are: Transmitted by the AP and intended to other associated STAs (basically all BSS DL traffic minus 1) Transmitted by other associated STAs intended to the AP (basically all BSS UL traffic) Activating intra-PPDU PS for these PSDUs is very beneficial A STA is expected to receive frames generated within the BSS very frequently Hence, BSS COLOR alone does not provide information to enable intra-PPDU PS Because the STA at least needs to know that the PPDU is not intended for it Additional identifiers can help (see next slide) Slide 11 Submission Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Intra-PPDU PS enhancements When both BSS COLOR field and UL/DL Flag are available: Non-AP STA determines if the member PPDU is uplink or downlink The STA can go to sleep for all member PPDUs that are uplink (only UL) Hence, the addition of UL/DL Flag is beneficial for intra-PPDU PS Non-AP STAs can sleep during all UL member PSDUs not intended to it Note: A STA still has to receive DL member PPDUs not intended to it I.e., no intra-PPDU PS is possible for these frames An identifier of the intended receiver helps in this case, Pros and cons of this case are currently under investigation Submission Slide 12 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Summary We propose adding a BSS COLOR field and an UL/DL Flag field in the common portion of the HE PHY header to enable intra PPDU power saving for HE STAs Submission Slide 13 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Straw Poll 1 Do you support to add to the SFD: The spec shall support adding a BSS COLOR field in the SIG-A field The BSS COLOR field is an identifier of the BSS (size TBD) Submission Slide 14 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Straw Poll 2 Do you support adding the following rules to the SFD: An HE non-AP STA may enter the Doze state until the end of an HE DL MU PPDU if: the value of the PPDU s BSS COLOR field is equal to the BSS COLOR of its BSS, and the value derived from any of the STA Identifiers in the SIG-B field does not match its own identifier or that of a broadcast/multicast identifier An HE non-AP STA may enter the Doze state until the end of an HE UL MU PPDU if: the value of the PPDU s BSS COLOR field is equal to the BSS COLOR of its BSS Submission Slide 15 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Straw Poll 3 Do you support adding an UL/DL Flag field in the SIG-A of an HE SU PPDU? The UL/DL Flag indicates whether the frame is Uplink or Downlink The value of this field for TDLS is TBD Submission Slide 16 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 Straw Poll 4 Do you support to add the following rules to the SFD: An HE STA may enter the Doze state until the end of an HE SU PPDU if: the value of the PPDU s BSS COLOR field is equal to the BSS COLOR of its BSS, and the value of the UL/DL Flag field indicates that the frame is uplink Submission Slide 17 Alfred Asterjadhi, et. al.
September 2015 doc.: IEEE 802.11-15/1122r0 References [1] R. Porat (Broadcom), et, al, 11-14-0082-00-0hew-Improved-Spatial-Reuse- Feasibility-Part-I [2] 11-15/0314r2 Sleep States in IEEE 802.11ax Simulation Scenarios Submission Slide 18 Alfred Asterjadhi, et. al.
