1. Discussion on Spatial Reuse Operations in 11ax
Month Year
doc.: IEEE yy/xxxxr0
Mar 2016
Discussion on Spatial Reuse Operations in 11ax
Date:
Authors:
Name
Affiliation
Address
Phone
Jun Luo
Huawei
No 200 Jinsu Road, Shanghai China
Yunbo Li
F1-17, Huawei Base, Bantian, Shenzhen
Jiayin Zhang
Jun Zhu
No 200 Jinsu Road, Shanghai China 
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
Huawei Technologies
John Doe, Some Company

2. Authors (continued) Mar 2016 Yunsong Yang Huawei Junghoon Suh
Name
Affiliation
Address
Phone
Yunsong Yang
Huawei
10180 Telesis Court, Suite 365, San Diego, CA  NA
Junghoon Suh
303 Terry Fox, Suite 400 Kanata, Ottawa, Canada
Peter Loc
Huawei Technologies

3. 2111 NE 25th Ave, Hillsboro OR 97124, USA
Authors (continued)
Authors:
Name
Affiliation
Address
Phone
Ron Porat
Broadcom
Sriram Venkateswaran
Matthew Fischer
Zhou Lan
Leo Montreuil
Andrew Blanksby
Vinko Erceg
Mingyue Ji
Robert Stacey
Intel
2111 NE 25th Ave, Hillsboro OR 97124, USA     
Shahrnaz Azizi
Po-Kai Huang
Qinghua Li
Xiaogang Chen
Chitto Ghosh
Laurent Cariou
Yaron Alpert
Assaf Gurevitz
Ilan Sutskover
Huawei Technologies

4. Authors (continued) Hongyuan Zhang Marvell
Name
Affiliation
Address
Phone
Hongyuan Zhang
Marvell
5488 Marvell Lane, Santa Clara, CA, 95054
Yakun Sun
Lei Wang
Liwen Chu
Jinjing Jiang
Yan Zhang
Rui Cao
Sudhir Srinivasa
Bo Yu
Saga Tamhane
Mao Yu
Xiayu Zheng
Christian Berger
Niranjan Grandhe
Hui-Ling Lou
Huawei Technologies

5. Authors (continued) Alice Chen Qualcomm Albert Van Zelst
Name
Affiliation
Address
Phone
Alice Chen
Qualcomm
5775 Morehouse Dr. San Diego, CA, USA
Albert Van Zelst
Straatweg 66-S Breukelen, 3621 BR Netherlands
Alfred Asterjadhi
Arjun Bharadwaj
Bin Tian
Carlos Aldana
1700 Technology Drive San Jose, CA 95110, USA
George Cherian
Gwendolyn Barriac
Hemanth Sampath
Lin Yang
Menzo Wentink
Naveen Kakani
2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA
Raja Banerjea
1060 Rincon Circle San Jose CA 95131, USA
Richard Van Nee
Huawei Technologies

6. Authors (continued) Rolf De Vegt Qualcomm Sameer Vermani Simone Merlin
Name
Affiliation
Address
Phone
Rolf De Vegt
Qualcomm
1700 Technology Drive San Jose, CA 95110, USA
Sameer Vermani
5775 Morehouse Dr. San Diego, CA, USA
Simone Merlin
Tao Tian
Tevfik Yucek  
VK Jones
Youhan Kim
Huawei Technologies

7. Authors (continued) Jianhan Liu Mediatek USA
Name
Affiliation
Address
Phone
Jianhan Liu
Mediatek
USA
2860 Junction Ave, San Jose, CA 95134, USA
Thomas Pare
ChaoChun Wang
James Wang
Tianyu Wu
Russell Huang
James Yee
No. 1 Dusing 1st Road, Hsinchu, Taiwan  
Alan Jauh
Frank Hsu
Joonsuk Kim
Apple
Aon Mujtaba  
Guoqing Li
Eric Wong
Chris Hartman
Huawei Technologies

8. Authors (continued) Jinmin Kim LG Electronics
Name
Affiliation
Address
Phone
Jinmin Kim
LG Electronics
19, Yangjae-daero 11gil, Seocho-gu, Seoul , Korea
Kiseon Ryu
Jinyoung Chun
Jinsoo Choi
Jeongki Kim
Dongguk Lim
Suhwook Kim
Eunsung Park
JayH Park
HanGyu Cho
Thomas Derham
Orange
Bo Sun
ZTE
#9 Wuxingduan, Xifeng Rd., Xi'an, China
Kaiying Lv
Yonggang Fang
Ke Yao
Weimin Xing
Brian Hart
Cisco Systems
170 W Tasman Dr, San Jose, CA 95134
Pooya Monajemi
Huawei Technologies

9. Authors (continued) Fei Tong Samsung Hyunjeong Kang 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  
Shoko Shinohara
Yusuke Asai  
Koichi Ishihara  
Junichi Iwatani  
Akira Yamada
NTT DOCOMO
3-6, Hikarinooka, Yokosuka-shi, Kanagawa, , Japan
 3759
Huawei Technologies

10. Authors (continued) Huawei Technologies Name Affiliation Address Phone
Masahito Mori
Sony Corp.
Yusuke Tanaka
Yuichi Morioka
Kazuyuki Sakoda
William Carney
Tomoko Adachi
Toshiba
Narendar Madhavan
Kentaro Taniguchi
Toshihisa Nabetani
Tsuguhide Aoki
Koji Horisaki
David Halls
Filippo Tosato
Zubeir Bocus
Fengming Cao
Parag Kulkarni
Huawei Technologies

11. Authors (continued) Huawei Technologies Minho Cheong Newracom, Inc.
9008 Research Dr, Irvine, CA 92618
Reza Hedayat
Young Hoon Kwon
Yongho Seok
Daewon Lee
Yujin Noh
Sigurd Schelstraete
Quantenna
3450 W. Warren Ave, Fremont, CA 94538
Huizhao Wang
Huawei Technologies

12. Month Year
Doc Title
Recap on Spatial Reuse
Current SFD[1] has already approved the following SR operations:
An STA determines whether a detected frame is an inter-BSS or an intra-BSS frame by using BSS color or MAC address in the MAC header. If the detected frame is an inter-BSS frame, under TBD condition, uses TBD OBSS PD level that is greater than the minimum receives sensitivity level.
Spatial Reuse fields are decided to be carried in HE-SIG-A[1]. Currently the detailed fields and number of bits are TBD.
Questions: On what TBD condition, AP/STA can use OBSS PD(OPD) level to enable SR when detecting inter- BSS frame?
Huawei Technologies
John Doe, Some Company

13. Month Year
Doc Title
Observations
Note that SR link from inter-BSS should be disallowed on some cases:
Ongoing transmitter/receiver is located in highly overlapped scenario with too many potential OBSS SR links (e.g. detecting number of OBSS larger than a threshold)
PPDU needs reliable transmission(e.g., VOIP data with high QoS requirement or management frame)
PPDU length is less than a threshold (e.g., maximum BA transmission time)
Other conditions……
Huawei Technologies
John Doe, Some Company

14. Proposal: “SR_allowed” Signaling
Month Year
Doc Title
Proposal: “SR_allowed” Signaling
Propose to add “SR_allowed” signaling in HE-SIGA to indicate whether SR from OBSS is allowed or not.
use a value of SR field to indicate SR is disallowed (e.g. “all 0” of Spatial Reuse field means “disallowed”)
Otherwise, SR can be allowed
Huawei Technologies
John Doe, Some Company

15. How to Use “SR_Allowed” Signaling
Month Year
Doc Title
How to Use “SR_Allowed” Signaling
AP makes the decision to allow or disallow SR:
DL: AP carries “SR-allowed” indication in HE-SIGA of ongoing DL PPDU.
UL:AP carries “SR-allowed” indication in the common field of Trigger Frame. UL STAs copy this indication from TF to HE-SIGA of UL PPDU.
3rd party node may enable SR[*1] if all OBSS PPDUs it received indicate SR is allowed (i.e. the value of SR field is not equal to the SR disallowed value).
If any OBSS PPDU indicates to disallow SR, 3rd party nodes will use legacy CCA value (-82dBm) for channel assessment.
Note*1: Other TBD conditions(e.g. RSSI less than OPD) should also be satisfied.
“value!=all 0”
“value!=all 0”
DL PPDU
DL PPDU
BSS1
“value!=all 0”
“value=all 0” TF
“value!=all 0” TF
“value =all 0”
BSS2
UL PPDU
UL PPDU
No SR
3rd party node
SR PPDU
Huawei Technologies
John Doe, Some Company

16. Conclusion
In the presentation, we propose to carry “SR_allowed” signaling in HE-SIGA to indicate whether SR operation is allowed or not.
Huawei Technologies

17. Straw Poll Do you support to add to SFD
Include the “SR_allowed” signaling in HE-SIGA to indicate whether SR operation is allowed or not.
use a value of Spatial Reuse field to indicate SR is disallowed
The conditions to disallow SR are TBD
Y/N/A
Huawei Technologies

18. Reference
[1] ax-spec-framework
Huawei Technologies