doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 1 TGax MU Ad-hoc November 2015 Agenda Date: Authors:

doc.: IEEE /1418r2 November 2015 IEEE TGax High Efficiency WLAN MU Ad Hoc Co-Chairs: Kaushik Josiam (Samsung) Kiseon Ryu (LG Electronics) Sigurd Schelstraete (Quantenna) TGax MU ad-hoc groupSlide 2

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 3 Meeting Protocol Please announce your affiliation when you first address the group during a meeting slot November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 4 Attendance 1.Register 2.Indicate attendance See document r0 for more details November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 5 Agenda Items November , 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 –Wednesday PM2 Technical Presentations approved by ax chair for presentation this week, and related straw polls Any other technical presentations November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 6 Agenda Items November , 4:00PM – 6:00PM 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 –Wednesday PM2 Technical Presentations approved by ax chair for presentation this week, and related straw polls Any other technical presentations November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 7 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 November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 8 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 November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 9 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 November 2015

doc.: IEEE /1418r2 TGax MU ad-hoc groupSlide 10 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 November 2015

doc.: IEEE /1418r2 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 11 November 2015

doc.: IEEE /1418r2 Submissions (MU) TGax MU ad-hoc groupSlide 12 November 2015 DCNTitleAuthorsAd Hoc 11-15/1280Traffic priority for random Multi User Uplink OFDMAStephane BaronMU 11-15/1301NAV Rule for UL MU ResponseYingpei LinMU 11-15/1312MU BAR Frame FormatReza HedayatMU 11-15/1314I/Q Imbalance Impact to TGax OFDMA Uplink ReceptionRui YangMU 11-15/1325MU-RTS/CTS Follow UpPo-Kai HuangMU 11-15/1326NAV Consideration for UL MU Response Follow UpPo-Kai HuangMU 11-15/1328Scheduling information for UL OFDMA AcknowledgementYujin NohMU 11-15/1340NDP Announcement for HE Sequence Narendar MadhavanMU 11-15/1364Signaling Trigger Information for STAs in 11axChittabrata GhoshMU 11-15/1369Random access based buffer status reportWoojin AhnMU 11-15/1370UL OFDMA Random Access ControlJinsoo AhnMU 11-15/1374 Consideration for protecting cascading MU DL/UL transmission with MU RTS/CTSJing MaMU

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 13 MU- Straw-poll 1 Do you agree to add to the TG specification framework document? The spec shall define a procedure for the data selection upon random trigger frame reception, respectful of AC priorities: Yes: 5 No: 2 Abstain: Many Strawpoll fails DCN: 11-15/1280

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 14 MU- Straw-poll 2 Do you agree to add to the TG specification framework document? The spec shall define a Collision Risk Factor (CRF) reflecting the probability of transmission error to be taken into account in the CWO computation according to the formula: CWO = CWOmin x 2 CRF The CRF can be provided by the AP (optional Randomization Parameter [4]) or computed locally by each STA based on its previous MU UL transmission status. Randomization Parameter received from AP is priority compared to locally computed CRF value. Yes: 5 No: 7 Abstain: Many Strawpoll fails DCN: 11-15/1280

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 15 MU- Straw-poll 3 Do you agree to add to the TG specification framework document? A STA shall compute the CWOmin and CWOmax values upon TF-R reception. The CWOmin value shall be adapted according to the number of RU (NbRu) defined by the received TF-R, and the CWOmax shall be adapted (AC_Priority_Factor[] is TBD) according to the current highest priority (CurrentAC) of the data contained in AC queues. The resulting formulas for the CWOmin and CWOmax shall be: CWOmin=NbRu CWOmax=fct (AC_Priority_Factor[Current AC] ) Yes: 2 No: 5 Abstain: Many Strawpoll fails DCN: 11-15/1280

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 16 MU Straw-poll 4 Do you agree to add to the TG specification framework document? The STA shall compute the OBO from CWO + an offset based on data AC according to the formula : OBO=rand[0,CWO]+AC_Offset[Current_AC](TBD) Yes: 3 No: 5 Abstain: Many Strawpoll fails DCN: 11-15/1280

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 17 MU Straw Poll #5 Do you agree to add the following underlined part to the TGax Specification Framework: –4.3 UL MU operation [802.11ax SFD] 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 The NAV was set by a frame originating from intra-BSS STAs Other condition TBD Y : 35 N: 0 A: 28 Strawpoll passes DCN: 11-15/1301

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 18 MU Straw Poll #5 Do you agree to add the following to the SFD? Scheduling information for UL OFDMA Acknowledgement from STA may be contained within the “HE variant of the HT Control Field” Y/N/A: 19/0/26 Strawpoll passes DCN: 11-15/1328

doc.: IEEE /1418r2 November 2015 TGax MU ad-hoc groupSlide 19 MU Straw Poll #6 Do you agree to add the following to the SFD? HE variant of HT control field that contains scheduling information for UL MU Acknowledgement from STAs shall also include number of LTF symbols, N LTF, and PHY padding and packet extension signaling, PE, for UL MU transmission. The signaling format of the scheduling information for UL MU Acknowledgement is defined as Y/N/A: 9/23/25 Strawpoll fails VHT (1)HE (1)TBD PPDU length PEN LTF 9 TBD 3 3 RU allocation bits 1 1 TBD DCN: 11-15/1328

doc.: IEEE /1418r2 MU Straw Poll #7 Do you agree the following to be added to 11ax SFD: 7.2.X: The MU BAR frame is a Trigger frame whose Trigger Type subfield is MU BAR that carries additional BAR Control subfield (TBD) and an additional BAR Information subfield (TBD) in Common Info and/or each Per-User info. Yes: 22 No: 2 Abstain: 22 Strawpoll passes Slide 20 November 2015 DCN: 11-15/1312 TGax MU ad-hoc group

doc.: IEEE /1418r2 MU Straw Poll #8 Do you agree to add to the TG Specification Frame work document? –x.y.z. MU-RTS/CTS frame exchange may be used for protection of MU transmissions during that TXOP Yes: 47 No: 0 Abstain: 7 Strawpoll passes Slide 21 DCN: 11-15/1325 TGax MU ad-hoc group November 2015

doc.: IEEE /1418r2 MU Straw Poll #9 Do you agree to add to the TG Specification Frame work document? –x.y.z. The MAC format of MU-RTS is a variant of trigger frame format Yes: 48 No: 0 Abstain: 8 Strawpoll passes Slide 22 DCN: 11-15/1325 TGax MU ad-hoc group November 2015

doc.: IEEE /1418r2 MU Straw Poll #10 Do you agree to add to the TG Specification Frame work document? –x.y.z. The CTS sent in response to a frame that solicits simultaneous CTS shall be transmitted on one or more 20 MHz channels. Yes: 44 No: 0 Abstain: 9 Strawpoll passes Slide 23 DCN: 11-15/1325 TGax MU ad-hoc group November 2015

doc.: IEEE /1418r2 MU Straw Poll #11 Do you agree to add to the TG Specification Frame work document? –x.y.z. MU-RTS may request STAs to send non-HT CTS immediate response Yes: 39 No: 0 Abstain: 7 Strawpoll passes Slide 24 DCN: 11-15/1325 TGax MU ad-hoc group November 2015

doc.: IEEE /1418r2 MU Straw Poll #12 Do you agree to add to the TG Specification Frame work document? –x.y.z. MU-RTS will carry signaling for each STA to indicate the 20MHz channel(s) for transmitting CTS responses when CTS is sent in (duplicate) non-HT PPDU When a STA sends CTS in response to MU-RTS, the CTS response shall be transmitted in the 20MHz channel(s) indicated in MU-RTS –provided other transmission conditions TBD are met (e.g. channel idleness) The indicated 20 MHz channel(s) can be either Primary20, Primary40, Primary80 or 160/80+80 MHz. Other indications are TBD. Exact Signaling TBD Y/N/A: 40/3/12 Strawpoll passes Slide 25 DCN: 11-15/1325 November 2015

doc.: IEEE /1418r2 MU Straw Poll #13 Do you agree to add to the TG Specification Frame work document? –x.y.z. A STA maintains two NAVs One is the NAV for Intra-BSS frame, and second one is the NAV for Inter-BSS frame or frame that cannot be determined to be Intra-BSS or Inter-BSS Note that maintaining two NAVs does not imply maintaining two NAV timers The detailed method of maintaining two NAVs (e.g., two NAV timers or one NAV timer with difference of two NAV values, etc.) is TBD Mandatory or Optional TBD Y/N/A: 30Y/0/14 Strawpoll passes Slide 26 DCN: 11-15/1326 TGax MU ad-hoc group November 2015

doc.: IEEE /1418r2 MU Straw Poll #14 (Not for pre-motion) Do you agree to add a sequence similar to the VHT sounding sequence that does not include a trigger frame and where the sounding feedback frames are sent in SU PPDUs for HE DL sounding sequence? Y/N/A: 8/3/33 Slide 27 November 2015 HE NDP-A HE NDP HE Compressed Beamforming Beamforming Report Poll HE Compressed Beamforming Beamforming Report Poll HE Compressed Beamforming AP STA 1 STA 2 STA 3 SIFS DCN: 11-15/1340 TGax MU ad-hoc group

doc.: IEEE /1418r2 MU Straw Poll #15 Do you agree to amend the following text in the SFD as follows: 4.6. Lines –The amendment shall define a new shall follow a channel sounding sequence (Refer Fig. 14) initiated by an HE AP that includes a trigger information frame, a SIFS after NDP frame, in order to facilitate UL MU mode of Compressed Beamforming Action frame from multiple HE STAs Y/N/A: 7/1/many Strawpoll passes Slide 28 November 2015 DCN: 11-15/1340 TGax MU ad-hoc group

doc.: IEEE /1418r2 MU Straw Poll #16 Do you agree to add the following text to the SFD: Within an A-MPDU the trigger information for a STA, if present, shall be signaled either in Trigger frame(s) or in the MAC header of MPDU(s) contained in the A-MPDU but not both. Yes:28 No: 0 Abstain: 14 Strawpoll passes November 2015 Slide 19 DCN: 11-15/1364 TGax MU ad-hoc group