doc.: ieee 802.11-15/1357r1 submission extra tones in the preamble november, 2015 slide 1 date:...
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doc.: IEEE /1357r1 Submission Slide 3 Authors (continued) NameAffiliationAddressPhone Alice Chen Qualcomm 5775 Morehouse Dr. San Diego, CA, USA Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA Bin Tian 5775 Morehouse Dr. San Diego, CA, USA Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA George Cherian 5775 Morehouse Dr. San Diego, CA, USA Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA Lin Yang 5775 Morehouse Dr. San Diego, CA, USA Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands Naveen Kakani 2100 Lakeside Boulevard Suite 475, Richardson TX 75082, USA Raja Banerjea 1060 Rincon Circle San Jose CA 95131, USA Richard Van Nee Straatweg 66-S Breukelen, 3621 BR NetherlandsTRANSCRIPT
doc.: IEEE 802.11-15/1357r1
Submission
Extra tones in the preambleNovember, 2015
Slide 1
Date: 2015-11-06Authors:
Intel, Marvell, et. al.
Name Affiliation Address Phone Email
Robert Stacey
Intel
2111 NE 25th Ave, Hillsboro OR 97124,
USA
+1-503-724-893
Shahrnaz Azizi [email protected]
Po-Kai Huang [email protected]
Qinghua Li [email protected]
Xiaogang Chen [email protected]
Chitto Ghosh [email protected]
Laurent Cariou [email protected]
Yaron Alpert [email protected]
Assaf Gurevitz [email protected]
Ilan Sutskover [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 2
Authors (continued)
Name Affiliation Address Phone Email
Hongyuan Zhang
Marvell5488 Marvell Lane,Santa Clara, CA, 95054
408-222-2500
Yakun Sun [email protected]
Lei Wang [email protected]
Liwen Chu [email protected]
Jinjing Jiang [email protected]
Yan Zhang [email protected]
Rui Cao [email protected]
Sudhir Srinivasa [email protected]
Bo Yu [email protected]
Saga Tamhane [email protected]
Mao Yu [email protected]
Xiayu Zheng [email protected]
Christian Berger [email protected]
Niranjan Grandhe [email protected]
Hui-Ling Lou [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 3
Authors (continued)
Name Affiliation Address Phone Email
Alice Chen
Qualcomm
5775 Morehouse Dr. San Diego, CA, USA [email protected]
Albert Van Zelst Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
Alfred Asterjadhi 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Arjun Bharadwaj 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Bin Tian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Carlos Aldana 1700 Technology Drive San Jose, CA 95110, USA [email protected]
George Cherian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Gwendolyn Barriac 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Hemanth Sampath 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Lin Yang 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Menzo Wentink Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
m
Naveen Kakani2100 Lakeside Boulevard
Suite 475, RichardsonTX 75082, USA
Raja Banerjea 1060 Rincon Circle San JoseCA 95131, USA [email protected]
Richard Van Nee Straatweg 66-S Breukelen, 3621 BR Netherlands [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 4
Authors (continued)
Name Affiliation Address Phone Email
Rolf De Vegt
Qualcomm
1700 Technology Drive San Jose, CA 95110, USA [email protected]
Sameer Vermani 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Simone Merlin 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Tao Tian 5775 Morehouse Dr. San Diego, CA, USA [email protected]
Tevfik Yucek 1700 Technology Drive San Jose, CA 95110, USA [email protected]
VK Jones 1700 Technology Drive San Jose, CA 95110, USA [email protected]
Youhan Kim 1700 Technology Drive San Jose, CA 95110, USA [email protected]
Ron Porat
Broadcom
Sriram Venkateswaran [email protected]
Matthew Fischer
Leo MontreuilAndrew Blanksby
Vinko Erceg
doc.: IEEE 802.11-15/1357r1
Submission Slide 5
Authors (continued)
Joonsuk Kim
Apple
Aon Mujtaba [email protected]
Guoqing Li [email protected]
Eric Wong [email protected]
Chris Hartman [email protected]
Name Affiliation Address Phone Email
James Yee
Mediatek
No. 1 Dusing 1st Road, Hsinchu, Taiwan +886-3-567-0766 [email protected]
Alan Jauh [email protected]
Chingwa Hu [email protected]
Frank Hsu [email protected]
Thomas Pare
MediatekUSA
2860 Junction Ave, San Jose, CA 95134, USA +1-408-526-1899 [email protected]
ChaoChun Wang [email protected]
James Wang [email protected]
Jianhan Liu [email protected]
Tianyu Wu [email protected]
Zhou Lan [email protected]
Russell Huang [email protected]
m
doc.: IEEE 802.11-15/1357r1
Submission Slide 6
Authors (continued)
Name Affiliation Address Phone Email
Peter Loc
Huawei
Le Liu F1-17, Huawei Base, Bantian, Shenzhen +86-18601656691 [email protected]
Jun Luo 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Yi Luo F1-17, Huawei Base, Bantian, Shenzhen +86-18665891036 [email protected]
Yingpei Lin 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Jiyong Pang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai [email protected]
Zhigang Rong10180 Telesis Court, Suite
365, San Diego, CA 92121 NA
Rob Sun 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
David X. Yang F1-17, Huawei Base, Bantian, Shenzhen [email protected]
Yunsong Yang10180 Telesis Court, Suite
365, San Diego, CA 92121 NA
Junghoon Suh 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
Jiayin Zhang 5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai +86-18601656691 [email protected]
Edward Au 303 Terry Fox, Suite 400 Kanata, Ottawa, Canada [email protected]
Teyan Chen F1-17, Huawei Base, Bantian, Shenzhen [email protected]
Yunbo Li F1-17, Huawei Base, Bantian, Shenzhen [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 7
Authors (continued)
Name Affiliation Address Phone Email
Jinmin Kim
LG Electronics19, Yangjae-daero 11gil, Seocho-gu, Seoul 137-
130, Korea
Kiseon Ryu [email protected]
Jinyoung Chun [email protected]
Jinsoo Choi [email protected]
Jeongki Kim [email protected]
Dongguk Lim [email protected]
Suhwook Kim [email protected]
Eunsung Park [email protected]
JayH Park [email protected]
HanGyu Cho [email protected]
Thomas Derham Orange [email protected]
Bo Sun
ZTE
#9 Wuxingduan, Xifeng Rd., Xi'an, China [email protected]
Kaiying Lv [email protected] Fang [email protected]
Ke Yao [email protected] Xing [email protected] Hart
Cisco Systems 170 W Tasman Dr, San Jose, CA 95134
[email protected] Monajemi [email protected]
doc.: IEEE 802.11-15/1357r1
Submission Slide 8
Authors (continued)
Name Affiliation Address Phone Email
Fei Tong
Samsung
Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434633 [email protected]
Hyunjeong Kang Maetan 3-dong; Yongtong-GuSuwon; South Korea +82-31-279-9028 [email protected]
Kaushik Josiam 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7437 [email protected]
Mark Rison Innovation Park, Cambridge CB4 0DS (U.K.) +44 1223 434600 [email protected]
Rakesh Taori 1301, E. Lookout Dr, Richardson TX 75070 (972) 761 7470 [email protected]
Sanghyun Chang Maetan 3-dong; Yongtong-GuSuwon; South Korea +82-10-8864-1751 [email protected]
Yasushi Takatori
NTT 1-1 Hikari-no-oka, Yokosuka, Kanagawa 239-0847 Japan
Yasuhiko Inoue [email protected]
Shoko Shinohara [email protected]
Yusuke Asai [email protected]
Koichi Ishihara [email protected]
Junichi Iwatani [email protected]
Akira Yamada
NTT DOCOMO
3-6, Hikarinooka, Yokosuka-shi, Kanagawa, 239-8536, Japan [email protected]
Fujio Watanabe3240 Hillview Ave, Palo Alto,
CA 94304
Haralabos Papadopoulos hpapadopoulos@docomoinnova
tions.com
doc.: IEEE 802.11-15/1357r1
Submission Slide 9
Authors (continued)
Name Affiliation Address Phone Email
Masahito Mori
Sony Corp.
Yusuke Tanaka [email protected]
Yuichi Morioka [email protected]
Kazuyuki Sakoda [email protected]
William Carney [email protected]
doc.: IEEE 802.11-15/1357r1
Submission
Outline• To increase data subcarriers in SIG-A/SIG-B, we propose to
allocate 4 extra subcarriers to 1x portion of the HE preamble not including L-STF and L-LTF fields.
• With extra tones, there are some power imbalance issues need to be discussed.
Intel, Marvell, et. al.Slide 9
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
• Due to the limitation that L-LTF covers only 52 subcarriers, HE-SIG-A/HE-SIG-B can only transmit information on 48 subcarriers. – More payloads were added in HE-SIG-A for 11ax– HE-SIG-B may need to convey large amount of information depending
on the number of scheduled STAs• Propose to add training subcarriers in L-SIG
– This extension provides extra channel estimates for the subsequent symbols (HE-SIGA/HE-SIGB)
– Symbols that follow L-SIG will have a subcarrier allocation similar to 11n/ac
Intel, Marvell, et. al.Slide 11
Motivation for extra subcarriers in the HE preamble
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Increased Subcarrier Allocation in L-SIG
• Allocate additional subcarriers in L-SIG– They are extended L-LTF subcarriers used for channel estimation;– Allows more data bits in HE-SIG-A and HE-SIG-B than that of the L-
SIG– The repeated extra subcarriers in RL-SIG allow comparable SNR
performance as L-LTF
Intel, Marvell, et. al.Slide 12
L-STF L-LTF L-SIG R-L-SIG HE-SIGA1 HE-SIGA2 HE-SIGB
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Impacts to legacy/11ax devices
• For legacy devices:– The extension would not impact the performance of legacy
devices in decoding L-SIG;– The extended subcarriers are simply disregarded by the
legacy devices.
• For 11ax devices:– Aware of the additional subcarriers and use them for
channel estimation;– Decoding L-SIG similar to legacy devices.
Intel, Marvell, et. al.Slide 13
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Power Adjustment
• We propose to transmit L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B with the same total power as L-LTF field – We could scale the power on L-SIG and RL-SIG to maintain
the same power per tone as in L-LTF. But keeping the same power per OFDM symbol is more straightforward.
• By keeping the same power per symbol in L-SIG/RL-SIG and L-LTF, the estimated channel on L-LTF and those obtained from extra subcarriers of L-SIG/RL-SIG have slightly power imbalance. – Friendly to amplitude immunity modulation (BPSK/QPSK);– If 16QAM/64QAM is applied in SIGB, receiver may choose to de-
boost the CE with factor sqrt(52/56) on the tones spanned by L-LTF.
Slide 14 Intel, Marvell, et. al.
November, 2015
doc.: IEEE 802.11-15/1357r1
Submission
Summary
• To increase HE-SIG-A/HE-SIG-B payload, propose to add 4 extra subcarriers on L-SIG and RL-SIG for additional LTF training.– Add 4 extra tones starting from L-SIG, through R-LSIG,
HE-SIG-A and HE-SIG-B fields.
• Propose to transmit L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B with the same total power as L-LTF field.– Receiver adjusts the power of estimated channel accordingly
if higher modulation order (>QPSK) is used on HE-SIG-B.
November, 2015
Intel, Marvell, et. al.Slide 15
doc.: IEEE 802.11-15/1357r1
Submission
Straw poll
• Do you support to:– Allocate 4 extra subcarriers, two at each edge of each 20MHz sub-
channel, for L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B fields in 11ax PPDUs.• The 4 subcarriers added to the L-SIG and RL-SIG fields are
transmitted with known TBD BPSK constellations (+-1).• The number of data subcarriers in HE-SIG-A and HE-SIG-B fields
are increased by 4 in each 20MHz sub-channel.• L-SIG, RL-SIG, HE-SIG-A and HE-SIG-B fields are always
transmitted with the same total power as L-LTF field (in cases when L-LTF is not being boosted).
Slide 16 Intel, Marvell, et. al.
November, 2015