doc.: IEEE /1141r2 September 2015 TGax MU ad-hoc groupSlide 1 TGax MU ad-hoc September 2015 Agenda Date: Authors:

doc.: IEEE /1141r2 September 2015 IEEE TGax High Efficiency WLAN MU Ad Hoc Co-Chairs: Kiseon Ryu (LG Electronics) Sigurd Schelstraete (Quantenna) Kaushik Josiam (Samsung) TGax MU ad-hoc groupSlide 2

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 3 Meeting Protocol Please announce your affiliation when you first address the group during a meeting slot September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 4 Attendance 1.Register 2.Indicate attendance See document r0 for more details September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 5 Agenda Items September , 1:30PM – 3:30PM Call meeting to order Patent policy, etc. (Call for Potentially Essential Patents) Set and approve agenda Note ad hoc rules Note MU ad hoc sessions this week –Tuesday PM1 –Tuesday PM3 –Wednesday PM2 Technical Presentations approved by ax chair for presentation this week, and related straw polls Any other technical presentations September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 6 Agenda Items September , 7:30PM – 9:30PM Call meeting to order Patent policy, etc. (Call for Potentially Essential Patents) Set and approve agenda Note ad hoc rules Continue Technical Presentations approved by ax chair for presentation this week, and related straw polls Any other technical presentations September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 7 Agenda Items September , 4:00PM – 6:00PM Call meeting to order Patent policy, etc. (Call for Potentially Essential Patents) Set and approve agenda Note ad hoc rules Continue Technical Presentations approved by ax chair for presentation this week, and related straw polls Any other technical presentations September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 8 Participants, Patents, and Duty to Inform All participants in this meeting have certain obligations under the IEEE-SA Patent Policy. Participants: –“Shall inform the IEEE (or cause the IEEE to be informed)” of the identity of each “holder of any potential Essential Patent Claims of which they are personally aware” if the claims are owned or controlled by the participant or the entity the participant is from, employed by, or otherwise represents “Personal awareness” means that the participant “is personally aware that the holder may have a potential Essential Patent Claim,” even if the participant is not personally aware of the specific patents or patent claims –“Should inform the IEEE (or cause the IEEE to be informed)” of the identity of “any other holders of such potential Essential Patent Claims” (that is, third parties that are not affiliated with the participant, with the participant’s employer, or with anyone else that the participant is from or otherwise represents) –The above does not apply if the patent claim is already the subject of an Accepted Letter of Assurance that applies to the proposed standard(s) under consideration by this group Quoted text excerpted from IEEE-SA Standards Board Bylaws subclause 6.2 Early identification of holders of potential Essential Patent Claims is strongly encouraged No duty to perform a patent search Slide #1 September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 9 Patent Related Links All participants should be familiar with their obligations under the IEEE-SA Policies & Procedures for standards development. Patent Policy is stated in these sources: IEEE-SA Standards Boards Bylaws IEEE-SA Standards Board Operations Manual Material about the patent policy is available at Slide #2 If you have questions, contact the IEEE-SA Standards Board Patent Committee Administrator at or visit This slide set is available at September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 10 Call for Potentially Essential Patents If anyone in this meeting is personally aware of the holder of any patent claims that are potentially essential to implementation of the proposed standard(s) under consideration by this group and that are not already the subject of an Accepted Letter of Assurance: –Either speak up now or –Provide the chair of this group with the identity of the holder(s) of any and all such claims as soon as possible or –Cause an LOA to be submitted Slide #3 September 2015

doc.: IEEE /1141r2 TGax MU ad-hoc groupSlide 11 Other Guidelines for IEEE WG Meetings All IEEE-SA standards meetings shall be conducted in compliance with all applicable laws, including antitrust and competition laws. –Don ’ t discuss the interpretation, validity, or essentiality of patents/patent claims. –Don ’ t discuss specific license rates, terms, or conditions. Relative costs, including licensing costs of essential patent claims, of different technical approaches may be discussed in standards development meetings. –Technical considerations remain primary focus –Don ’ t discuss or engage in the fixing of product prices, allocation of customers, or division of sales markets. –Don ’ t discuss the status or substance of ongoing or threatened litigation. –Don ’ t be silent if inappropriate topics are discussed … do formally object See IEEE-SA Standards Board Operations Manual, clause and “Promoting Competition and Innovation: What You Need to Know about the IEEE Standards Association's Antitrust and Competition Policy” for more details. Slide #4 September 2015

doc.: IEEE /1141r2 A straw poll needs to achieves at least 75% at the ad-hoc level to be converted to a motion at the TG level. In the case a consensus can not be reached within an Ad Hoc group (a stalemate that prohibits further progress), the subject is moved to the Task group, if an Ad Hoc straw poll vote to move the subject to the Taskgroup achieves >50% approval. A straw poll affecting the Spec Framework has to start with, –Do you agree to add to the TG Specification Frame work document? –x.y.z. For further details, please see the operating rules for Tgax Ad-hoc groups – tgax-ad-hoc-groups.docxhttps://mentor.ieee.org/802.11/dcn/15/ ax-operating-rules-for- tgax-ad-hoc-groups.docx Ad-hoc Group Straw poll rules Document: 15/0075r0 TGax MU ad-hoc groupSlide 12 September 2015

doc.: IEEE /1141r2 Submissions (MU) TGax MU ad-hoc groupSlide 13 September 2015 DCNTitleAuthorAd Hoc 11-15/1043Overall Protocol of UL MU BA for Multicast TransmissionKazuyuki SakodaMU 11-15/1047RU selection process upon TF-R receptionStephane BaronMU 11-15/1053Multiuser Block ACK Request (MU-BAR)Guoqing LiMU 11-15/1057Multiple Resource Unit Allocation for TGax OFDMAKome OteriMU 11-15/1058CCA consideration for UL MU transmissionKiseon RyuMU 11-15/1062NAV Consideration for UL MU Response to Trigger framePo-Kai HuangMU 11-15/106511ax uplink Multi-TID aggregationChao-Chun WangMU 11-15/1086Consideration on multi-STA BA frame indicationJing MaMU 11-15/1097Reducing Channel Sounding Protocol Overhead for 11axNarendar MadhavanMU 11-15/1102Fragmentation with MU OperationChittabrata GhoshMU 11-15/1103DL Sounding Sequence with UL MU FeedbackChittabrata GhoshMU 11-15/1105UL OFDMA-based Random Access ProcedureChittabrata GhoshMU 11-15/1107Power Save with Random AccessChittabrata GhoshMU 11-15/1117Regarding UL MU protectionWoojin AhnMU 11-15/1123Acknowledgement to DL MULiwen ChuMU 11-15/1129Feedback overhead in DL-MU-MIMOFilippo TosatoMU

doc.: IEEE /1141r2 Straw poll 1 Do you agree to add to the TG Specification Frame work document? –4.y.z. The amendment shall include a mechanism to multiplex acknowledgment frames to Multicast transmission. –Yes: /No: /Abstain: 11/0/Many Strawpoll passes September 2015 Yusuke Tanaka, Sony CorporationSlide 14

doc.: IEEE /1141r2 The spec shall define a MU-BAR frame to solicit BA/ACKs from multiple STAs in UL MU transmissions? –Yes: 57 –No: 0 –Abs: 4 Strawpoll passes Strawpoll 1 Slide 15 September 2015 Guoqing Li, Apple

doc.: IEEE /1141r2 Straw Poll #1 Do you agree to add to the TG Specification Framework? The amendment shall allow multiple RUs to be allocated to a single user Y/N/A: 14/23/22 Strawpoll fails Kome Oteri (InterDigital)Slide 16 Sept 2015

doc.: IEEE /1141r2 Straw poll Do you agree to add to the SFD? 4 Multi-user (MU) features 4.1 General STA shall consider CCA to respond to a Trigger frame under a non- null TBD set of conditions. Yes: 47 No: 0 Abstain: 13 Strawpoll passes Kiseon Ryu et al. (LG)Slide 17

doc.: IEEE /1141r2 Straw Poll #1 Do you agree to add to the TG Specification Frame work document? –x.y.z. A STA that is polled from a trigger frame for UL MU transmission considers the NAV in determining whether to respond unless one of the following conditions is met the NAV was set by a frame originating from the AP sending the trigger frame the response contains ACK/BA and the duration of the UL MU transmission is below a TBD threshold Other condition TBD Yes: 46 No: 3 Abstain: 13 Strawpoll passes Po-Kai Huang et al. (Intel) Slide 18

doc.: IEEE /1141r2 Chao-Chun Wang al, MediaTek Inc.Slide 19 Straw Poll September 2015 Move to add to the SFD: The spec shall allow multiple TIDs in a single PSDU between AP and a STA for DL/UL OFDMA/MU-MIMO Multiple TIDs aggregation rules are TBD if necessary Y/N/A: 39/0/12 Strawpoll passes

doc.: IEEE /1141r2 Straw Poll 1 Do you agree to add to the TG Specification Framework: x.y.z. : –The amendment shall define a mechanism to enable multiplexing of the Compressed Beamforming Action frame (CSI feedback) from multiple stations using UL MU(MIMO or OFDMA) mode –Y/N/A: 24/0/8 Strawpoll passes Slide 20Narendar Madhavan, Toshiba September 2015

doc.: IEEE /1141r2 Straw Poll 2 Do you agree to add to the TG Specification Framework: x.y.z. : –The amendment shall define a new channel sounding sequence that includes trigger information in order to facilitate UL MU mode of Compressed Beamforming Action frame from multiple STAs. –Y/N/A: 21/0/14 Strawpoll passes Slide 21Narendar Madhavan, Toshiba September 2015

doc.: IEEE /1141r2 Straw-poll Do you agree that the spec shall support fragmentation negotiation in A-MPDUs for HE STAs? Yes: 51 No: 0 Abstain: 9 Strawpoll passes Slide 22 September 2015 Chittabrata Ghosh, et al. (Intel)

doc.: IEEE /1141r2 Straw-poll 1 Do you agree to include the DL sounding sequence illustrated in Slide 15 (of /1103r0) to the spec framework? Yes: 40 No: 0 Abstain: 7 Strawpoll passes Slide 23 September 2015 Chittabrata Ghosh, et al. (Intel)

doc.: IEEE /1141r2 Straw-poll 1 Do you agree to include the random access procedure illustrated in Slide 12 (of /1105r0) to the spec framework? Yes: 31 No: 5 Abstain: 8 Strawpoll passes Slide 24 September 2015 Chittabrata Ghosh, et al. (Intel)

doc.: IEEE /1141r2 Straw-poll 1 Do you agree to add to the spec framework? The spec shall indicate cascaded sequence of Trigger frames for random access by using a bit in the Trigger frame. Yes: 41 No: 0 Abstain: 11 Strawpoll passes Slide 25 September 2015 Chittabrata Ghosh, et al. (Intel)

doc.: IEEE /1141r2 Straw-poll 2 Do you agree to add to the spec framework? The spec shall include a mechanism that allows the Beacon frame to indicate the target transmission time(s) of one or more Trigger frame(s) that allocates resources for random access. Yes: 40 No: 0 Abstain: 11 Strawpoll passes Slide 26 September 2015 Chittabrata Ghosh, et al. (Intel)

doc.: IEEE /1141r2 Strawpoll Do you agree to add to the TG Specification Frame work document? –4.2.z. The spec shall define a function that Trigger frame solicits simultaneous CTS responses from multiple STAs to protect UL MU transmission. In case of UL MU protection with simultaneous CTS, UL MU Data transmission follows the simultaneous CTS after xIFS (IFS is TBD). Y/N/A: 7/21/18 Strawpoll fails Slide 27Woojin Ahn, Yonsei Univ. September 2015

doc.: IEEE /1141r2 Straw Poll 1 Do you agree to add the following to the SFD? The spec shall allow that the schedule information for OFDMA acknowledgement from STAs is contained in the MAC header of DL MPDU. Y/N/A: 33/0/14 Strawpoll passes Slide 28Liwen Chu et al. (Marvell)

doc.: IEEE /1141r2 Straw Poll 2 Do you agree to add the following to the SFD? The scheduling information content of OFDMA acknowledgement from STAs with the other scheduling information TBD: –UL PPDU Length (9 bits) + RU Allocation (TBD). Y/N/A: 33/0/10 Strawpoll passes Slide 29Liwen Chu et al. (Marvell)

doc.: IEEE /1141r2 Straw Poll Do you agree to add the following to the IEEE TGax Specification Framework (sec 4.1)? The amendment shall define a mechanism to reduce the MIMO compressed beamforming feedback overhead Y:N:A = 29/0/13 Strawpoll passes Slide 30Filippo Tosato, Toshiba September 2015