doc.: ieee 802.11-15/1120r0 submission buffer status report slide 1 date: 2015-09-12 authors: alfred...
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doc.: IEEE 802.11-15/1120r0
Submission
Buffer Status Report
Slide 1
Date: 2015-09-12
Authors: Name Affiliation Address Phone email
Alfred Asterjadhi
Qualcomm
5775 Morehouse Dr. San Diego, CA, USA
aasterja@qti.qualcomm.com
Simone Merlin smerlin@qti.qualcomm.com
Bin Tian 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 gbarriac@qti.qualcomm.com
Hemanth Sampath hsampath@qti.qualcomm.com
Menzo Wentink
Straatweg 66-S Breukelen, 3621 BR Netherlands
mwentink@qti.qualcomm.com
Richard Van Nee rvannee@qti.qualcomm.com
Albert Van Zelst allert@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 vkjones@qca.qualcomm.com
Youhan Kim youhank@qca.qualcomm.com
1 Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 2
Authors (continued):
Name Affiliation Address Phone email
Kiseon Ryu
LG Electronics
19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-130,
Korea 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
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
Shahrnaz Azizi
Intel
2200 Mission College Blvd, Santa Clara, CA 95054
shahrnaz.azizi@intel.com
Eldad Perahia eldad.perahia@intel.com
Robert Stacey 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
Chittabrata Ghosh chittabrata.ghosh@intel.com
Rongzhen Yang rongzhen.yang@intel.com
Laurent cariou laurent.cariou@intel.com
1 Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 3
Authors (continued)Name Affiliation Address Phone email
Ron Porat
Broadcom
rporat@broadcom.com
Matthew Fischer mfischer@broadcom.com
Sriram Venkateswaran
Tu Nguyen
Vinko Erceg
Lei Wang
Marvell
5488 Marvell Lane, Santa Clara, CA, 95054
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
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
1
Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 4
Authors (continued)
James Yee
Mediatek
No. 1 Dusing 1st 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
` 1 Thomas Pare
Mediatek USA
2860 Junction Ave, San Jose, CA 95134, USA
+1-408-526-1899 thomas.pare@mediatek.com
ChaoChun Wang chaochun.wang@mediatek.com
James Wang james.wang@mediatek.com
Jianhan Liu Jianhan.Liu@mediatek.com
Tianyu Wu tianyu.wu@mediatek.com
Russell Huang russell.huang@mediatek.com
` 1
Name Affiliation Address Phone email
1
Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 5
Authors (continued)
Name Affiliation Address Phone email
Phillip Barber
Huawei
The Lone Star State, TX pbarber@broadbandmobiletech.com
Peter Loc 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
1 Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 6
Authors (continued)Name Affiliation Address Phone email
Thomas Derham Orange
thomas.derham@orange.com
1 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.co
m
Fujio Watanabe 3240 Hillview Ave, Palo
Alto, CA 94304 watanabe@docomoinnovatio
ns.com
Haralabos Papadopoulos
hpapadopoulos@docomoinnovations.com
1 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.co
m
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
1 Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Slide 7
Authors (continued)
Name Affiliation Address Phone email
Bo Sun
ZTE
#9 Wuxingduan, Xifeng Rd Xian, China
sun.bo1@zte.com.cn
Kaiying Lv lv.kaiying@zte.com.cn
Yonggang Fang
Ke Yao
Weimin Xing
Brian Hart Cisco Systems
170 W Tasman Dr, San Jose, CA 95134
brianh@cisco.com
Pooya Monajemi pmonajem@cisco.com
Joonsuk Kim
Apple
joonsuk@apple.com
Aon Mujtaba mujtaba@apple.com
Guoqing Li guoqing_li@apple.com
Eric Wong ericwong@apple.com
Chris Hartman chartman@apple.com
1
Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Alfred Asterjadhi, et. al.
Introduction
• One of the main features introduced in 11ax is UL MU operation– AP allocates UL resources used by multiple STAs to transmit their data
• For an efficient allocation the AP needs to know UL buffer status (BS) of its STAs. The BS knowledge allows the AP to: – Allocate resources to those STAs that have something to transmit in UL– Calculate correctly the UL resources needed by the STAs
• We propose to specify a BS report mechanism that:– Relies on QoS Control field and its enhancements for improving BS
report– Allows solicited or unsolicited delivery of the buffer status reports
• Delivery is performed using commonly expected 11ax frame exchanges
Slide 8
September 2015
doc.: IEEE 802.11-15/1120r0
Submission
Summary of Proposal
• AP elicits for BS reports via the Trigger frame– The AP can indicate whether it is soliciting BS information for:
• E.g., a particular TID (per-TID), for all TIDs (all-TID), with different granularity, …
• STA delivers BS report in QoS Control of QoS Data/Null frames– Per-TID BS info. is contained in Queue Size/TXOP Duration Requested
subfield• Note: This is the same signaling that is used for HCCA
• Note: Delivering BS information with different granularity, for the solicited and unsolicited case, is beneficial as well (see Appendix). The signaling for this case is currently TBD
Slide 9 Alfred Asterjadhi, et. al.
September 2015
doc.: IEEE 802.11-15/1120r0
Submission
“BS report” frames: Details
• STA reports BS info. in the QoS Control field of frames it transmits:– Queue Size is reported when AP is in control of UL TX parameters (e.g., MU)– TXOP Duration Requested when non-AP STA is in control of them (e.g., SU)
Slide 10 Alfred Asterjadhi, et. al.
September 2015
“BS Report”
doc.: IEEE 802.11-15/1120r0
Submission Alfred Asterjadhi, et. al.
BS Report mechanism: Overview
• STAs implicitly report their BS information in “BS report” frames– A “BS report” frame is any frame that contains QoS Control field
• AP can explicitly solicit particular BS info. in “BS polling” frames– The frame carrying the Trigger is proposed to act as a “BS polling” frame
• It can explicitly contain the type of BS information requested– E.g., Per-TID versus all-TID “BS report” (eventually the TID for which the
per-TID polling refers to)– Requested granularity for the BS info (i.e., units different from default)
Slide 11
September 2015
QoS Data
QoS Data
Trigger
QoS Data Ack
DL Data 3
DL Data 5
BA/QoS Data
BA/QoS Data
Beacon
BA
Buffer Status Report
Trigger
QoS Data/Null
Ack
SUMU
doc.: IEEE 802.11-15/1120r0
Submission Alfred Asterjadhi, et. al.
Summary
• We propose to re-use the QoS Control field for reporting BS– When carried in QoS Data/Null frame it allows per-TID “BS report”
• We also propose a simple BS signaling mechanism that enables:– AP to solicit BS information from STAs with different granularity
• Future extensions are possible to enable BS reports with different granularity
Slide 12
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Alfred Asterjadhi, et. al.
Straw Poll 1
• Do you support using the QoS Control field in QoS Data and QoS Null frames to report per-TID Buffer Status information?
Slide 13
September 2015
doc.: IEEE 802.11-15/1120r0
Submission Alfred Asterjadhi, et. al.
Straw Poll 2
• Do you support that an AP can poll STAs for buffer status reports using the frame carrying the trigger info?– The poll can request for specific buffer status information with TBD
granularity.
Slide 14
September 2015
doc.: IEEE 802.11-15/1120r0
Submission
APPENDIX
September 2015
Slide 15 Alfred Asterjadhi, et. al.
doc.: IEEE 802.11-15/1120r0
Submission
QoS Control field: Overview
• Current format of QoS Control field carries per-TID queue size/duration:– Queue Size ranges from 0 to 64 768 Octets, with a unit of 256 Octets– TXOP Duration Requested ranges from 0 to 8160 us, with a unit of 32 us
• However, HE transmit rates are expected to be highly flexible:– Covering a wider range (from ~416Kbps (@2.5MHz) to up to ~10?Gbps (@160MHz))– Hence, these limitations in BS info. signaling will lead to inefficient allocations
• E.g. 1: AP allocates low rate RU to STA that signaled 256 Bytes of UL Data– But STA actually has less (e.g., 128 Bytes) UL to be delivered in the 256 Octet RU
• An RU of ~5ms for UL TX@416Kbps requires that all UL MU STAs transmit for 5ms!– When time needed by the STA is actually half of that (50% of MU resource is wasted)
• E.g., 2: AP allocates high rate RU to STA that signaled >64 KB of UL Data– But STA actually has more (e.g., 640 KB) UL to be delivered in the 64KB Octet RU
• An RU of ~1 ms for UL TX@500Mbps is enough to transmit only 10% of its UL– When the STA could actually support transmitting at higher rates to deliver its UL (resource was
underused)
• Similar observations apply to the TXOP Duration Requested subfield as well
Slide 16
September 2015
Alfred Asterjadhi, et. al.
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