September 2008 doc.: IEEE 802.11-08/1003r0 March 2009 802.11aa – Robust Audio Video Transport Streaming Vancouver, British Columbia Opening Report Date: 2009-02-18 Authors: Ganesh Venkatesan, Intel Corporation Alex Ashley, NDS Ltd

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Abstract This submission summarizes TGaa goals and agenda for the IEEE 802.11 Vancouver Session (March 2009). Slide 2 Ganesh Venkatesan, Intel Corporation Page 2 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Snapshot Since the Los Angeles session: March 2009 Snapshot Since the Los Angeles session: 2 Teleconferences focused on (a) OBSS and (b) Reliable Multicast. Goals for the Vancouver Session: OBSS Adopt formal definition of OBSS for TGaa Listen, review and adopt OBSS solution into the TGaa draft Listen, review, down select and adopt Reliable Multicast mechanism(s) into TGaa draft Jointly meet with 802.1AVB: Discuss 802.11 specific input to DMN specification Discuss viability of the ‘drop precedence’ idea Ganesh Venkatesan, Intel Corporation

Opening Report March 2009 November 2007 September 2008 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Opening Report Slide 4 Ganesh Venkatesan, Intel Corporation Page 4 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Attendance Recording - 802.11 September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Attendance Recording - 802.11 Sign-in at http://newton.events.ieee.org “newton” is a local server, not reachable via a VPN “newton” is active only during 802.11 sessions First “sign in” to provide contact information Only name and affiliation may be posted publicly, as per IEEE rules No other personal information will be publicly available Second, log attendance Sign In Slide 5 Ganesh Venkatesan, Intel Corporation Page 5 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

As a Courtesy To Others … March 2009 As a Courtesy To Others … PLEASE switch your Mobile Phones OFF, or to VIBRATE Alert, remember to MUTE your PC also please ! "Our thanks to all those people who now use Headsets !” The use of Audio and / or Video recording of any 802.11 meeting is Specifically Prohibited as per the 802.11 WG Policies and Procedures. This is mandated by the IEEE-SASB in the OpManual - 5.3.3.5. Still photography is only permitted by a public request and permission of the meeting membership via the WG Chair, and is not for commercial purposes, also mandated by IEEE-SASB in the OpManual - 5.3.3.4. Ganesh Venkatesan, Intel Corporation

802.11aa – March 2009 March 2009 Call Meeting to Order September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 802.11aa – March 2009 Call Meeting to Order Policies and Procedures, Attendance reminder: http://newton.events.ieee.org/ **IEEE Patent Policy http://standards.ieee.org/board/pat/pat-slideset.ppt Are there any patent claim(s)/patent application claim(s) and/or the holder of patent claim(s)/patent application claim(s) that the participant believes may be essential for the use of that standard? Minute any responses that were given, specifically the patent claim(s)/patent application claim(s) and/or the holder of the patent claim(s)/patent application claim(s) that were identified (if any) and by whom. ***Affiliation FAQ - http://standards.ieee.org/faqs/affiliationFAQ.html Anti-Trust FAQ - http://standards.ieee.org/resources/antitrust-guidelines.pdf Ethics - http://www.ieee.org/portal/cms_docs/about/CoE_poster.pdf IEEE 802.11 Policies and Procedures - http://www.ieee802.org/11/DocFiles/07/11-07-0360-04-0000-802-11-policies-and-proceedures.htm IEEE 802 Policies and Procedures - http://www.ieee802.org/policies-and-procedures.pdf ** Read slide deck *** Note especially items #7 & #11 Slide 7 Ganesh Venkatesan, Intel Corporation Page 7 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Overview of the plan for the week September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 Overview of the plan for the week March 2009 Review Joint Meeting material (if needed) Approvals [Review & ] Approve Los Angeles Meeting minutes (09/0170r0) [Review & ] Approve Jan -Mar 09 teleconference minutes (09/0221r1) Approve teleconference schedule OBSS Adopt formal definition of OBSS for TGaa Listen, review and adopt OBSS solution into the TGaa draft Listen, review, down select and adopt Reliable Multicast mechanism(s) into TGaa draft Jointly meet with 802.1AVB: Discuss 802.11 specific input to DMN specification Discuss viability of the ‘drop precedence’ idea Slide 8 Ganesh Venkatesan, Intel Corporation Page 8 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Technical Presentations March 2009 Technical Presentations Distributed Channel Assignment 09/285r0 Andrew Myles OBSS Analysis of Channel Requirements 08/1470r4 Graham Smith Overlapping BSS Proposal 09/230r0 Graham Smith OBSS OSQAP QoS Issues 09/347r0 Graham Smith Efficient Error Control Using Network Coding for Multicast Transmission 09/277r0 Kevin Rhee Feedback-jamming Multicast ARQ 09/.290r0 Jochen Miroll Quasi-reliable Multicast 09/247r0 Jochen Miroll More Reliable GroupCast Proposal Present 09/340r0 Hang Liu Drop Precedence in wireless, wired-wireless networks 09/264r0 Alex Ashley AVB DMN and 802.11 09/0403r0 Philippe Klein Group addressed normative text 08/1244r2 Slide 9 Ganesh Venkatesan, Intel Corporation

TGaa Agenda (tentative) September 2008 doc.: IEEE 802.11-08/1003r0 March 2009 TGaa Agenda (tentative) Monday AM1 (ad hoc) Administrivia Review of joint meeting material (if needed) OBSS Thursday AM1 (Jointly with 802.1AVB) Administrivia 802.11 specific input to DMN specification Drop Precedence in wireless, wired-wireless networks Joint teleconferences? Plans for the next joint meeting Monday AM2 (ad hoc) OBSS Tuesday AM2 (OBSS) Administrivia Approvals OBSS strategy/plan Review OBSS Requirements (08/944r7) Motion to approve OBSS definition Overview of Harmonized Reliable Multicast (09/340r0) Thursday PM1 (Reliable Multicast) Administrivia Reliable Multicast Motion to adopt Reliable Multicast proposal(s) Review closing report Wednesday AM1 (Reliable Multicast) Administrivia Reliable Multicast Ganesh Venkatesan, Intel Corporation Alex Ashley, NDS Ltd

Tuesday AM2 Agenda Administrivia Approvals March 2009 Tuesday AM2 Agenda Administrivia Approvals OBSS strategy/plan [55 minutes] Review OBSS Requirements (08/944r7) Motion to approve OBSS definition OBSS QoS proposal (09/347r0) Overview of Harmonized Reliable Multicast (09/340r0) [40 minutes] Ganesh Venkatesan, Intel Corporation

Wednesday AM1 Agenda Administrivia Reliable Multicast March 2009 Wednesday AM1 Agenda Administrivia Reliable Multicast Efficient Error Control Using Network Coding for Multicast Transmission 09/277r0 Kevin Rhee Feedback-jamming Multicast ARQ 09/.290r0 Jochen Miroll Quasi-reliable Multicast 09/247r0 Jochen Miroll More Reliable GroupCast Proposal Present 09/340r0 Hang Liu Review Group addressed normative text 08/1244r2 Ganesh Venkatesan, Intel Corporation

Thursday AM1 Agenda Joint 802.11aa/802.1AVB March 2009 Thursday AM1 Agenda Joint 802.11aa/802.1AVB Administrivia 802.11 specific input to DMN specification Drop Precedence in wireless, wired-wireless networks (09/264r0) Discussion on Worst Case delay for audio, video streams over an 802.11 link Need a mechanism to report the value 802.1Qav Class-A/Class-B traffic classes Re-iterate that Class-A’s end-to-end requirement is 2 msec Status of 802.11aa Joint teleconferences? Plans for the next joint meeting Ganesh Venkatesan, Intel Corporation

Thursday PM1 Agenda Administrivia Announcement(s) Reliable Multicast March 2009 Thursday PM1 Agenda Administrivia Announcement(s) Reliable Multicast Q & A on 09/340r0 Review of more reliable multicast normative text 08/1244r2 Motion to adopt Reliable Multicast proposal(s) Teleconference Schedule: Discussion and approval Timeline review (skipped) Review closing report OBSS strategy and plan Ganesh Venkatesan, Intel Corporation

Minutes review Los Angeles Minutes 09/0170r0 September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Minutes review Los Angeles Minutes 09/0170r0 Jan – Mar ‘09 Teleconference minutes 09/0221r1 Mar 09, 2009 ad hoc meeting minutes 09/324r0 Slide 15 Ganesh Venkatesan, Intel Corporation Page 15 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Motion-1 Move to approve TGaa Los Angeles Session Minutes (in document 09/0170r0). Moved: Hang Liu Second: David Hunter Vote: unanimous Slide 16 Ganesh Venkatesan, Intel Corporation Page 16 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Motion-2 Move to approve Jan - Mar ‘09 Teleconference Minutes (document 09/0221r1) Moved: Graham Smith Second: David Hunter Vote: Unanimously Slide 17 Ganesh Venkatesan, Intel Corporation Page 17 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Motion-3 Move to approve march 09, 2009 ad hoc meeting minutes (document 09/0324r0) Moved: Alex Ashley Second: Hang Liu Vote: Unanimously Slide 18 Ganesh Venkatesan, Intel Corporation Page 18 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Motion-4 Move to request the WG approve the following TGaa Teleconferences – Bi-weekly on Mondays between 1100-1230Hrs ET, starting March 23rd 2009 till July 27th, 2009. Moved: Graham Smith Second: Hang Liu Vote: Unanimously Slide 19 Ganesh Venkatesan, Intel Corporation Page 19 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

What is OBSS? OBSS Definitions: Scope of OBSS Solution – September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 What is OBSS? March 2009 OBSS Definitions: OBSS edge -- Any two APs operating in the same channel and can hear each other (either directly or via a STA associated to one of the APs) OBSS Graph – is a graph where APs are nodes of the graph and the edges are OBSS edges and every AP with in the OBSS graph can be connected via one or more OBSS APs to every other AP in the OBSS graph Length(OBSS graph) – longest shortest path between any two APs in the OBSS graph Size(OBSS graph) – number of nodes (APs) in the OBSS graph Scope of OBSS Solution – if length(OBSS graph) <= 2 and the size(OBSS graph) <=3 , enable the OBSS QAP solution otherwise (a) backoff to legacy (non .11aa) mode or (b) use a different solution Slide 20 Ganesh Venkatesan, Intel Corporation Page 20 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Issues with the scope of OBSS solution? September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 Issues with the scope of OBSS solution? March 2009 Length (OBSS graph) <= 2 is insufficient? 2.4GHz band has only 3 channels and suffers in OBSS environment. It is not in the scope of TGaa OBSS solution If the number of channels is > 17, a length of greater than 2 is improbable A length of 7 or 8 is common in dense deployments if the number of available channels is limited 9 or 11. This condition could be mitigated by having the QAPs fall back from 40MHz to 20MHz channels. Should TGaa specify a mechanism for this? Is a mechanism/solution that only addresses the scope as defined acceptable (despite the fact that consistent performance will not be met) as an incremental step over legacy? If a length of 7 or 8 is accepted to be the scope of the solution, it is not any simpler than the general OBSS problem (which is considered NP-Hard) Slide 21 Ganesh Venkatesan, Intel Corporation Page 21 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

September 2008 November 2007 doc.: IEEE 802.11-07/2752r1 doc.: IEEE 802.11-08/1003r0 March 2009 Motion-5 Move to instruct the editor to create the TGaa draft 0.01 and incorporate the text from document 08/1244r2. Moved: Liwen Chu Second: Alex Ashley Vote: Unanimously Slide 22 Ganesh Venkatesan, Intel Corporation Page 22 Alex Ashley, NDS Ltd Peter Ecclesine, Cisco Systems

Plans for the Montreal (May 2009) Session March 2009 Plans for the Montreal (May 2009) Session In upcoming teleconferences Layout a OBSS strategy and plan MRG discussions Additional mechanisms for Reliable Multicast Address other topics from TGaa PAR Plans for May ‘09 (Montreal) Meeting Continue activities from teleconferences Technical presentations on TGaa PAR topics Review and improve TGaa draft Slide 23 Ganesh Venkatesan, Intel Corporation