1. Response Given Trigger Frame Type
Date:
Name
Affiliation
Address
Phone
Jian Yu
Huawei
F1-17, Huawei Base, Bantian, Shenzhen
David X. Yang
Peter Loc
Le Liu
Jun Luo
5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai
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
Yunsong Yang
Junghoon Suh
David Xun Yang et al. (Huawei)

2. Authors (continued) Jiayin Zhang Huawei Edward Au Teyan Chen Yunbo Li
Name
Affiliation
Address
Phone
Jiayin Zhang
Huawei
5B-N8, No.2222 Xinjinqiao Road, Pudong, Shanghai
Edward Au
303 Terry Fox, Suite 400 Kanata, Ottawa, Canada
Teyan Chen
F1-17, Huawei Base, Bantian, Shenzhen
Yunbo Li

3. 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

4. Authors (continued) Alice Chen Albert Van Zelst Alfred Asterjadhi
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

5. Authors (continued) Rolf De Vegt Sameer Vermani Qualcomm 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

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

7. 2111 NE 25th Ave, Hillsboro OR 97124, USA
Authors (continued)
Name
Affiliation
Address
Phone
Ron Porat
Broadcom
Sriram Venkateswaran
Matthew Fischer
Leo Montreuil
Andrew Blanksby
Vinko Erceg
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

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

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

10. Authors (continued) Name Affiliation Address Phone Email Masahito Mori
Sony Corp.
Yusuke Tanaka
Yuichi Morioka
Kazuyuki Sakoda
William Carney

11. Introduction
Trigger type (allowed response type / Trigger frame variant) is in the common info field to indicate the allowed response type of the UL MAC frames
In this contribution, we discuss how the STAs respond given the allowed response type
David Xun Yang et al. (Huawei)

12. Response Given the Trigger Type
When the AP sends a trigger frame variant, e.g., TF for CSI (or BF report poll trigger), here are several options for the response rule
Opt1: The response shall only contain the frame with required type; if there is no frame with the required type, the STA shall transmit QoS Null frame
Opt2: The response shall contain at least frame with required type if the required type is available at the STA side; if there is no frame with the required type, the STA shall transmit QoS Null frame
Opt3: The response shall contain at least the frame with required type if the required type is available at the STA side; if there is no frame with the required type, , the STA can transmit other frame(s) without required type restriction (e.g., data frame)
David Xun Yang et al. (Huawei)

13. Pros. VS. Cons.
Opt1: The response shall only contain the frame with required type if the required type is available at the STA side; if there is no frame with the required type, the STA shall transmit QoS Null frame
Pros: easy for implementation and scheduling
Cons: a lot of padding may exist, the efficiency is low
Opt2: The response shall contain at least frame with required type if the required type is available at the STA side; if there is no frame with the required type, the STA shall transmit QoS Null frame
Pros: easy for implementation, aggregation of other types of MAC frames (e.g., data frame) will increase the efficiency
Cons: the resource will be wasted if no required response is available
Opt3: The response shall contain at least the frame with required type if the required type is available at the STA side; if there is no frame with the required type, , the STA can transmit other frame(s) without required type restriction (e.g., data frame)
Pros: efficiency can be high even no required response is available
Cons: the implementation and state machine are very complicated. Difficult for scheduling.
We prefer Opt2, and think Opt3 can be helpful
David Xun Yang et al. (Huawei)

14. Reference 11-15-0132-13-00ax-spec-framework
David Xun Yang et al. (Huawei)

15. Straw Poll Do you support to add the following to the SFD:
If the trigger frame requests a specific frame type as response, the response to this trigger frame shall contain at least the frame with the required type if the required type is available at the STA side; if the STA has no frame with the required type, the STA should transmit QoS Null frame to AP.
David Xun Yang et al. (Huawei)