IEEE
P802.11aa TG - MEETING UPDATE
Status
of Project IEEE 802.11aa Task Group
Robust streaming of Audio
Video Transport Streams
March
2012,
•
802.11aa Status
report
•
Amendment 2:
MAC Enhancements for Robust Audio Video Streaming " will
be reviewed by RevCom for its 28 March 2012 meeting.
•
Expected
publish date is 8 weeks afterwards
•
Approved
Minutes for Teleconference and
•
Joint meeting
with 802.1avb
•
Status
•
Work under
consideration by 802.1avb
•
Very large
networks with time critical streams
•
Possible
pre-emption and scheduling
•
Support of
redundant paths
•
Standards for
putting the AP in the middle of the networks, (RJ45 and Ethernet and 802.11)
•
802.11 bridging
•
Presentation on
changes required to Annex C of 802.1Q-2011, 12/0432r0 (Alex Ashley, NDS)
•
During the comment resolution process of P802.11aa, some
MIB attributes, MLME primitives and frames were renamed
•
Possible future liaison
•
Suggested that
wait until the requirement is clearer, informal discussion with 802.11
‘experts’ then possible joint presentation to WNG if there is a gap
Closing Report is document 12/0448r0
January
2012,
•
Result of
Second re-Circulation Sponsor Ballot is 100% approval. 6 comments received which were resolved in
Teleconference (12/0002r2)
•
Discussed and
agreed four additional changes
(details in 12/0137r0)
•
Prepared Draft
9.0 incorporating these resolutions and changes and Approved
a 10-day Sponsor Group Recirculation Ballot.
Closing Report is document 12/0135r0
November
2011,
•
Resolved all
initial Sponsor Ballot comments (11/1382r3)
•
147 comments
•
Discussed
11/1417r1, “Ping-Pang Handoff”
•
Consensus that
subject was not in PAR for 11aa
•
Passed Motion
to approve a 15-day Sponsor Group Recirculation Ballot of D 7.0
•
Held a joint
meeting with 801.AVB
Closing Report is in document 11/1578r0
September
2011
•
802.11aa Draft
D6.0
–
Is in the
second week of its first Sponsor Ballot
–
Sponsor Ballot
1 votes are due October 12, 2011
•
There were no
discussions at this meeting
Plans:
·
Teleconferences
(Oct 24, 27 and 31 – 1130-1330 Hrs EDT)
•
In the
teleconferences and at the November 2011 meeting:
–
Work on
resolutions of comments from SB 1
–
Complete
resolutions and begin another SB
Closing Report is in document 11/1071r0
July
2011
Accomplishments
· Resolved all LB179 comments.
· Completed required documentation in order to obtain
conditional approval from the EC to start sponsor ballot of P802.11aa.
· Jointly met with 802.1AVB.
· Graham Smith (DSP Group) has been elected as the new
chair of Task Group aa.
Listened
to the following submissions:
|
Comment
Resolution Status – 100% done (Comment Resolution Spreadsheet is 11/0867r7)
|
|
|
|||
|
|
Accept |
Principle |
Declined,
Withdrawn |
Total |
|
Editor |
31 |
16 |
16 |
63 |
|
GCR |
3 |
12 |
2, 13 |
30 |
|
General |
|
1 |
|
1 |
|
Interworking |
1 |
|
|
1 |
|
OBSS |
4 |
19 |
3 |
26 |
|
SCS |
|
6 |
5 |
11 |
|
Total |
39 |
54 |
39 |
132 |
Plans:
Teleconferences (Aug 15,
Sep 01, Oct 24, 27, 31, Nov 03 2011 – 1130-1330 Hrs EDT)
·
review and resolve letter ballot comments
After
the July 2011 Meeting
·
Complete draft 6.0 recirculation and resolve
resulting comments
·
Complete a clean draft 6.0 recirculation
·
Start sponsor ballot
Sept 2011 Meeting
· Since
the first sponsor ballot is targeted to complete on Oct 17. 2011 which is after
the week of the September 2011 meeting, the plan is to meet in the September
2011 meeting and provide a status update on the progress made in completing the
milestones planned between now and the September 2011, to the members.
Closing Report is in document 11/1071r0
Meeting Minutes are in document
11/1096r0
May
2011 Indian Wells,
Accomplishments
· Resolved all LB175 comments
· Generated ANA requests for P802.11aa
Listened
to the following submissions:
|
Comment
Resolution Status – 100% done (Comment Resolution Spreadsheet is 11/523r7)
|
|
|
|||
|
|
Accept |
Principle |
Declined |
Total |
|
Editor |
18 |
2 |
|
20 |
|
GCR |
11 |
14 |
3 |
28 |
|
General |
|
4 |
|
4 |
|
OBSS |
7 |
25 |
|
32 |
|
SCS |
4 |
3 |
2 |
9 |
|
Total |
40 |
48 |
5 |
93 |
Plans:
Teleconferences
(Mondays June 13, 20, 27; July 11 2011 – 1130-1230 Hrs EDT)
·
review comment resolutions
After
the May 2011 Meeting
·
Start 4th recirculation LB with
P802.11aa D5.0
·
Start MECs with
P802.11aa D5.0
·
Form Sponsor Ballot Pool
July 2011 Meeting
· Resolve 4th recirculation LB comments/MEC
comments and generate Draft 6.0
· Joint
Meeting with 802.1AVB
Closing Report is in document 11/0799r0
Meeting Minutes are in document
11/0786r0
Mar 2011
Accomplishments
– Resolved
all LB173 comments
Listened to the following
submissions:
|
Comment Resolution Status –
100% done (Comment Resolution Spreadsheet is 11/267r3)
|
|
|
|||
|
|
Accept |
Principle |
Declined |
Total |
|
Editor |
168 |
28 |
15 |
211 |
|
GCR |
11 |
68 |
18 |
97 |
|
General |
16 |
5 |
|
21 |
|
Interworking |
4 |
4 |
2 |
10 |
|
OBSS |
19 |
33 |
5 |
57 |
|
SCS |
7 |
13 |
5 |
25 |
|
Total |
225 |
151 |
45 |
421 |
Plans:
·
Teleconferences (Mondays Mar 28,
Apr 04, 11, 18, 2011 –
1130-1230 Hrs EDT)
·
review comment resolutions
·
May 2011 Meeting
o
Resolve third recirculation LB Comments
o
Complete Draft5.0 and start fourth
recirculation
Closing Report is in document 11/0430r0
Meeting Minutes are in document
11/0431r0
Jan 2011
Accomplishments
– Resolved
all LB170 comments
Comment Resolution Status –
100% done (Comment Resolution Spreadsheet is 10/1441r9)
|
|
|
|||
|
|
Accept |
Principle |
Declined |
Total |
|
Approved_Editor |
12 |
3 |
2 |
17 |
|
Approved_GCR |
45 |
83 |
22 |
150 |
|
Approved_General |
|
|
1 |
1 |
|
Approved_Interworking |
13 |
12 |
4 |
29 |
|
Approved_OBSS |
29 |
48 |
21 |
98 |
|
Approved_SCS |
11 |
18 |
3 |
32 |
|
Total |
110 |
164 |
53 |
327 |
Plans:
·
Teleconferences (Mondays Feb 14,
21, 28; Mar 07, 2011 –
1130-1230 Hrs EDT)
o review comment resolutions
·
Jan 2011 Meeting
o
Resolve second recirculation LB Comments
o
Complete Draft4.0 and start third
recirculation
o
Joint Meeting with 802.1AVB
Closing Report is in document 11/0176r0
Meeting Minutes are in document
11/0137r0
Nov 2010
Accomplishments
– Resolved all LB164 comments
– Joint
meeting with 802.1AVB
Joint Meeting with 802.1AVB
·
Overview of changes to 802.11 to support
802.1Qat
·
Discussion on future 802.1AVB topics
Having an 802.11 BSS act like first class
802.1Q bridges (so they can participate in the dynamic reconfiguration and
management protocols)
Open: How to deal with the STA-Bridge issue?
QoS Maintenance Reports
Action for 802.11aa: Specific details on
802.11k/v traffic stream statistic reports
Making sure 802.11 APs
and STAs know the difference between "multicast" and "group
address" as conditions for routing action ... so that a stream that
has a DA with the "I/G" bit set does NOT necessarily result in a
broadcast transmission (with all the attendant wastage of bandwidth).
Action for 802.11aa: Overview of 802.11aa MRG (now known
as GCR)
·
MaxRes for 802.11
Comment Resolution Status
(Comment Resolution Spreadsheet is 10/1181r3)
|
* 287 comments are duplicates due to a processing error
Plans
·
Teleconferences (Nov 29; Dec 13, 20; Jan 03,10 –
1130-1230 Hrs EDT)
·
review comment resolutions
·
Jan 2011 Meeting
o Resolve first recirculation LB comments
o Generate and recirculate Draft
3.0
o Harmonize with MAC Protection, OBSS and BAR extensions in TGac/TGad
Closing Report is in document 10/1365r0
Meeting Minutes are in document
10/1333r0
Sept 2010
Accomplishments
–Started the
meeting with a great demo of some 11aa features from Alex Ashley
–Focused on
LB164 comment resolution
–Resolved and
adopted resolutions for 190 comments in this meeting
–A
modification to MRG that has the TG consensus has the potential to resolve a
significant chunk of MRG comments.
Comment Resolution Status
|
Category |
Total |
Resolved |
Resolved and adopted |
|
Editorial |
78(145) |
78 |
78 |
|
General |
36(41) |
04 |
0 |
|
Interworking |
33(40) |
33 |
33 |
|
MRG |
303(361) |
14 |
14 |
|
OBSS |
188(283) |
87 |
87 |
|
SCS |
56(111) |
56 |
56 |
|
|
994* [756] |
272 (39%) |
268 (37%) |
* 287 comments are duplicates due to a processing error
Plans
·
Teleconferences (Sep 27, Oct 11, Oct 18, Oct 25, Nov 1 and Nov 15, 2010
– 1100-1230 Hrs EDT)
·
review comment resolutions
·
Nov 2010 Meeting
o
Resolve
pending LB164 comments
o
Generate
and recirculate Draft 2.0
Closing Report is in document 10/1163r3
Meeting Minutes are in document
10/0881r0
July 2010
TGaa Draft1.0
passed WG Letter Ballot with 78.3% approval.
Listened to the following proposals:
|
|
||||||||||||||||||||||||
|
Accomplishments
· Joint meeting with 802.1AVB
· LB164 comment resolutions (~33% comments have resolutions)
· Listened to technical presentations
Comment Resolution Status
|
Category |
Total |
Resolved |
Resolved and adopted |
|
Editorial |
145 |
|
145 |
|
General |
41 |
04 |
0 |
|
Interworking |
40 |
40 |
0 |
|
MRG |
361 |
|
0 |
|
OBSS |
283 |
|
0 |
|
SCS |
111 |
67 |
0 |
|
Others |
13 |
|
0 |
|
|
994* [756] |
14.68% |
19.17% done |
* 238 comments are duplicates due to a processing error
Plans
·
Teleconferences (July 26, Aug 02, 09, 16
and 23, 2010 – 1100-1230 Hrs EDT)
·
review comment resolutions
·
Sep 2010 Meeting
o
Resolve
pending LB164 comments
o
Generate
and recirculate Draft 2.0
Closing Report is in document 10/0906r0
Meeting Minutes are in document
10/0881r0
May 2010
Listened to the following proposals:
|
|
Document number |
Title |
Author(s) |
|
1 |
10/541r1
|
Extending
11v QoS Traffic Capability |
Alex
Ashley |
|
2 |
10/457r1
|
Recommendation
for EDCA Overhead Factor |
Graham
Smith |
|
3 |
10/484r3
|
Draft0.03
Internal Review Comment Resolutions |
Ganesh
Venkatesan |
|
4 |
10/137r3
|
Interworking
with 802.1Qat – 802.11 specific changes |
Ganesh
Venkatesan |
|
5 |
10/458r0
|
MIB
Style guide |
Alex
Ashley |
|
6 |
10/606r0
|
Location
for the DEI bit |
Alex
Ashley |
|
|
|
|
|
Accomplishments
· Discussed and resolved comments on Draft 0.03, Draft 0.04
and Draft 0.05
· Approved comment resolutions and empowered editor to
generate Draft 1.0
· WG Letter Ballot to start once Draft 1.0 is ready
Plans
·
Teleconferences (June 21, 2010 – 1100-1230
Hrs EDT)
·
Discuss open issues
·
July 2010 Meeting
o
Resolve
Letter Ballot Comments
o
Joint
meeting with 802.1AVB
Closing Report is in document 10/0644r0
Meeting Minutes are in document
10/0622r0
Mar 2010
Listened to the following proposals:
|
|
Document number |
Title |
Author(s) |
|
1 |
10/219r3
|
Solution
Choices for Interworking with 802.1Qat |
Ganesh
Venkatesan |
|
2 |
09/1183r1
|
Resolution
to Draft 0.02 Internal Review Comment #3 |
Brian
Hart |
|
3 |
10/319r0,10/320r0
|
Improving
MRG with DMS |
Brian
Hart |
|
4 |
10/304r0
|
Empirical
Formulae for EDCA overhead factor |
Graham
Smith |
|
5 |
10/398r0
|
Designated
MSRP Node handling on 802.11 Network |
Philippe
Klein |
|
6 |
10/326r0
|
OBSS
Race Condition Solution |
Alex
Ashley |
|
7 |
10/411r0, 10/412r0 |
Frame-Specific
Retry Limit for Intra-Stream Prioritization |
Yacine Ghamri Doudane |
Accomplishments
·
Discussed, resolved and approved
corresponding contributions related to comments on Draft 0.02, D0.03
·
Listened to technical proposals on TGaa topics
·
Jointly met with 802.1AVB
·
Reviewed alternate solutions on interworking
with 802.1Qat proposal.
·
Selected an approach for 802.11 interworking with 802.1Qat MSR
protocol
·
Empowered the editor to generate D0.05
incorporating approved internal review comment resolutions/new contributions.
Plans
·
Teleconferences (Mar 29, Apr 12, Apr 26,
May 10 – 1100-1230 Hrs EDT)
·
Complete internal review of Draft 0.04, resolve corresponding
comments
·
Listen to technical proposals on TGaa topics
·
Complete Draft 0.05 review
and generate comment spreadsheet
·
May 2010 Meeting
·
Complete Draft 0.05 comment resolution
·
Approve Draft1.0 and kickoff WG letter Ballot
Closing Report is in document 10/0395r0
Meeting Minutes are in document
10/0422r0
Jan 2010 2010,
Listened to the following proposals:
|
Document number |
Title |
Author(s) |
|
09/850r2 and 10/0048r1 |
Alternate
EDCA Parameter Set |
Alex
Ashley |
|
10/926r7 and 10/0137r0 |
Interworking
with 802.1Qat |
Ganesh
Venkatesan |
|
10/0055r0 |
Draft
0.03 Internal Review Comments |
TGaa
members |
|
09/850r4 |
4-Queue
version of Alternate EDCA Parameter Set proposal |
Alex
Ashley |
|
|
Informal
presentation on Harmonizing 802.11 MRG and 802.11v DMS |
Brian
Hart |
|
10/0062r0 |
OBSS
Race Condition |
Alex
Ashley |
Accomplishments
·
Listened to 4 technical presentations
·
Adopted resolutions to some internal review
comments into TGaa draft (10/0055r1)
·
Adopted technical proposal in 09/850r4 into TGaa draft
·
Adopted interworking with 802.1Qat proposal
in 10/0137r0 into TGaa draft
·
Planned for the joint meeting with 802.1AVB
in March 2010
Plans
Teleconferences
Mar 2010 meeting (
·
End the meeting with resolutions to all Draft
0.03/0.04 and empower the editor to generate Draft 1.0.
Closing Report is in document 10/0157r0
Meeting Minutes are in document
10/0127r0
Nov 2009,
Listened to the following proposals:
|
1150/r1 |
Feedback-jamming
Multicast ARQ results with capture effect |
Jochen
Miroll |
|
1139/r1 |
OBSS
Management Text |
Graham
Smith |
|
1138/r1 |
Outline
of Proposed OBSS Solution |
Graham
Smith |
|
1137/r1 |
EDCA
Bandwidth Factor |
Graham
Smith |
|
1136/r1 |
AP
Shut Out Neighborhood Effect |
Graham
Smith |
|
0926/r4 |
Interworking
with 802.1Qat |
Ganesh
Venkatesan |
|
1215/r0 |
Non-contentious
(internal review) comments assigned to BrianH |
Brian
Hart |
|
1251/r0 |
Intra-AC
Prioritization Use Cases |
Alex
Ashley |
|
1157/r1 |
Explain
OBSS issue as well as possible simulation scenarios for OBSS in TGac |
Takatori
Yasushi |
Accomplishments
Plans
Teleconferences
·Hear presentations on inter-working with 802.1Qat and Intra-AC priorities
·Review Draft 0.02 and address comments/issues
Jan ‘09 meeting (
·
End the session with approved text for all TGaa PAR topics
Closing Report is in document 09/1269r1
Meeting Minutes are in document
09/1270r0
Sep 2009,
The Task Group did not meet.
July 2009,
Listened to the following proposals:
1. Stream Classification Service (09/0725r0)
2. Implementation for Intra-AC Differentiated Services
(09/0022r1)
3. Applicability of 802.11s MCCA to HCCA OBSS (09/0660r3)
4. OBSS Sharing with Access Fraction (09/0662r2)
5. 40MHz Channel Selection (09/0740r0)
6. HCCAOP Scheme – Efficiency and Sharing (09/0666r3)
7. Proposal for OBSS (09/0757r1)
8. Agenda for Joint Meeting with 802.1AVB (09/787r0)
9. 20MHz versus 40MHz for
Video (09/805r0)
10. OSQAP OBSS Requirements Compliancy (09/0882r0)
11. Neighborhood Capture and OBSS (09/0844r0)
In addition to these
presentation Graham Smith presented an overview of TGaa
Goals for OBSS to TGac (09/762r0).
Accomplishments
Adopted the Drop Precedence submission into TGaa Draft (09/726r1)
Listened to the complete OBSS solution (09/757r1)
Joint meeting with 802.1AVB
Decided not to meet in the September Interim
Listened to proposals/simulation results
Noted a 4 month slip in the TGaa
timeline
Plans
Teleconferences
·Continue with OBSS discussions
·Address review comments
·Prepare presentations for joint meeting with
AVB
·Prepare TGaa Draft
0.02
Nov ‘09 meeting (
·
Start the session with TGaa
Draft 0.02
·
Adopt submissions into TGaa
draft in order to address all the PAR topics
·
Meet jointly with 802.1AVB
Closing Report is in document
09/0891r0.
TGaa will not be meeting in
March 2009,
Listened to the following proposals:
12. Considerations for OBSS Sharing Using QLoad
element (09/497r2)
13. Considerations for Statistical Multiplexing Support for OBSS (09/496r2)
14. OBSS Simulations/Results
15. More Reliable Multicast/Broadcast results 09/528r1
Accomplishments
Vice-Chair --
Elected Alex Ashley as Vice-Chair for the Task Group
Listened to proposals/simulation results
Others
Internal review of Draft 0.01
Timeline review
Plan for the joint meeting with 802.1AVB (in the July
plenary)
Plans
Teleconferences
·
Continue with OBSS discussions
·
Address review comments
·
Aggressively address other topics from TGaa
PAR
·
Prepare presentations for joint meeting with
AVB
July ‘09 meeting (
·
Converge on a framework for OBSS
·
Complete internal review of D0.01
·
Make progress on other PAR topics
Closing Report
is in document 09/0613r0.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
March 2009,
Listened to the following proposals (* at the joint meeting with 802.1AVB):
1. Distributed Channel Assignment 09/285r0 Andrew Myles
2. OBSS Analysis of Channel Requirements 08/1470r4 Graham
Smith
3. Overlapping BSS Proposal 09/230r0 Graham Smith
4. OBSS OSQAP QoS Issues 09/347r0
Graham Smith
5. Efficient Error Control Using Network Coding for
Multicast Transmission 09/277r0 Kevin Rhee
6. Feedback-jamming Multicast ARQ 09/.290r0
Jochen Miroll
7. Quasi-reliable Multicast 09/247r0 Jochen Miroll
8. More Reliable GroupCast
Proposal Present 09/340r0 Hang Liu
9. Drop Precedence in wireless, wired-wireless networks*
09/264r0 Alex Ashley
10. AVB DMN and 802.11 09/0403r0* Philippe Klein
11. Group addressed normative text 08/1244r2
Accomplishments
OBSS
·
Listened to four presentations on OBSS in the
context of TGaa
·
Started discussions on a strategy and plan
for OBSS
Reliable Multicast
·
Reviewed the harmonized set of Reliable Multicast mechanism(s)
·
Listened to 2 additional proposals on
reliable multicast
·
Adopted harmonized Reliable Multicast
mechanism(s) into TGaa draft
Joint Meeting with 802.1AVB
·
How to accommodate SRP in 802.11?
·
Strategies for priority levels, precedence
levels and drop precedence
Plans
Teleconferences
·
Layout a OBSS strategy and plan
·
MRG discussions
·
Additional mechanisms for Reliable Multicast
·
Address other topics from TGaa
PAR
May ‘09 meeting (
·
Continue activities from teleconferences
·
Technical presentations on TGaa PAR topics
·
Review and improve TGaa
draft
Closing Report
is in document 09/0384r0.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
January 2009,
Listened to the following proposals:
Agreed on a constrained definition of OBSS, for which TGaa
will specify a solution. The definition is:
OBSS Definitions:
1. 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)
2.
OBSS Graph: A graph where APs are nodes of the graph and the edges are OBSS edges and
every AP within the OBSS graph can be connected via one or more OBSS APs to every other AP in the OBSS graph
3. Length(OBSS graph): Longest shortest path between any two APs in the OBSS graph
4. Size(OBSS graph): Number of nodes (APs)
in the OBSS graph
Scope of the 802.11aa
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
Plans for the March 2009
meeting (
1. Adopt reliable multicast proposals into the draft
2. Review and converge on OBSS definition/solution
4. Complete Draft 0.01
Closing Report is in document
09/0172r0.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
November 2008,
Listened to updates on 4 technical proposals
·
o
08/1272-00
Update on Managed Contention Access, Jing Zhu
o
08/126[01]-00
OSQAP and OBSS Requirements, Graham Smith
o
08/1250-00
Overlapping BSS, Brian Hart
o
08/1243-00
Duplicate Detection, Brian Hart
Listened to a presentation from 802.21 SG "Handover to Broadcast
Technologies"
Met jointly with 802.1AVB
input to 802.1Qat
Designated MSRP Node specification describing interworking with 802.11
Goals for the January 2009
802.11 Interim Meeting in
Listen to technical proposals
Review/Approve Normative submissions corresponding to
technical proposals
Start Draft 0.01 of TGaa
amendment
September 2008,
Goals for the November 2008
802.11 Plenary Meeting in
1. a tutorial on 802.11e, specifically on TSPECs
and what they mean; management interface to 802.11 QoS,
(by 802.11)
2. a tutorial on 802.1Qat, specifically the traffic classes
and what their delay/latency and throughput characteristics are (by 802.1AVB)
and
3. define a map between each 802.1Qat traffic
class to 802.11 TSPECs (jointly).
July 2008,
· Recognized the
need for a requirements document for OBSS and Reliable Multicast/Broadcast
statements in the PAR Scope.
· Listened to 14 technical presentations:
1.802.11 Packets and MPEG Frames – Background (08/717r1)
2.OBSS Requirements (08/765r0)
3.OBSS Complexity (08/864r0)
4.OBSS Follow up (08/457r3 – VTS document)
5.Managed Contention Access (08/818r1)
6.Multicast/Broadcast Communication with Acknowledgement (08/803r0)
7.Block ACK Enhancements for Multicast Transmissions (08/809r1)
8.More Reliable Broadcast/Multicast (08/816r1)
9.Group Block Acknowledgements for Multicast Traffic (08/766r0)
10.EDCA Enhancements to Improve Link Reliability for
Multicast Streams (08/810r0)
11.Robust Multicast/Broadcast Protocol (08/587)
12.Using Packet Drop Precedence for Graceful Degradation
(08/764r0)
13.Requirement and Implementation for Intraflow
and Inter-AC Diffserv (08/857r0)
14.VTS Frame Structure (08/802r0)
· Met jointly with
802.1AVB
Goal for the September 2008
802.11 Interim Meeting at
May 2008,
· Elected
TG officers -- Chair (Ganesh Venkatesan, Intel Corporation) /Technical Editor
(Hang Liu, Thomson, Inc)/Secretary (--open--)
· Established a time line for the project:
·
Internal Review. Comment Resolution May ’09 (completed by)
·
WG Letter Ballot, Comment Resolution Nov ‘09
·
WG Recirculation, Comment Resolution Mar ‘10
·
Sponsor Ballot, Comment Resolution Sep ‘10
·
Sponsor Ballot Recirculation, Comment Resolution Jan ‘11
·
Submission to RevCom for
Ratification/Publication May ‘11
· Joint
meeting with 802.11v -- describe Directed Multicast and determine if Directed
Multicast belongs in 802.11v or 802.11aa. Conclusion is that Directed
Multicast belongs in 802.11v
· Listened
to three technical presentations:
Goal for the July 2008
802.11 Plenary Meeting at
Status
of Project IEEE 802.11 VTS Study Group (VTS SG is now 802.11aa TG)
Robust streaming of Audio
Video Transport Streams
March 2008,
· Obtained
WG approval for VTS PAR (document 07/1972r13)
· Reviewed
comments on VTS PAR from NESCom and submitted comment
resolutions to NESCom.
· Listened
to two technical presentations:
o Documents 08/0249r0, 08/0263r1 -- Synchronous Collision
Resolution and
o Document 08/303r2 -- Robust Multicast/Broadcast
· Joint
Meeting with 802.1AVB:
1. Discussed 802.lQav/802.1Qat
requirements in order to recommend appropriate 802.11 TSpec
and TCLAS parameters
· Define the mapping from the parameters in Stream Reservation Request into
802.11 TSpec(s)
· Define requirements for information on the state of an 802.11 link and expectation from an 802.11 link that AVB can use
2. Discussed “802.11
· 4-address frame with a special RA
· 6-address format that encapsulates the original 802.3 frame
· Obtained
WG approval to request ExCom to extend VTS SG --
Vote: 45-4-7
· Obtained
WG approval for the PAR/5C submission (07/1972r14) -- Vote: 43-4-4
· ExCom meeting results:
1. VTS SG PAR Approval -->
Moved/Seconded Kerry/Jeffree Vote: 15/0/0
2. VTS SG extension --> Moved/Seconded
Kerry/Karl Stevenson Vote: 14/0/1
Goal for the May 2008 802.11
Interim meeting at
Jan 2008,
· Brainstormed
on the PAR Scope to ascertain that the scope clearly reflects the intent of the
VTS project.
· Listened
to one presentation (document 08/0165r0) as part of the discussion around
enhancements pertinent to Broadcast/Multicast of Video Streams.
· Completed the discussion and developed an amended scope. An
updated PAR/5C submission (document 07/1972r11) incorporated the amended scope.
· Approved the PAR/5C document to be forwarded to the WG for
approval.
· The WG
approved the VTS SG PAR/5C submission (07/1972r11). Since there was no quorum
at this meeting, the VTS SG PAR/5C submission need to
be re-affirmed at the March 2008 plenary meeting.
There are still some concerns on the VTS SG PAR/5C
submission (includes two spelling errors). The issues will be discussed and
addressed in the teleconferences.
Goal for the March 2008
802.11 Interim meeting is:
Nov 2007,
Tuesday Nov-13-2007 PM2:
·
Video Capabilities of 11n devices (07/2766r0
Michael Livshitz)
·
Multi-packet FEC (07/2847r1 Alex Ashley)
·
Improvements to 802.11 for Video Applications
(07/2685r1 Graham Smith)
·
Multicast Enhancements for
Multimedia streaming (07/2842r0, Denis Pankratov)
The intent of the second presentation was to add to the VTS SG scope the item
"Link Adaptation Mechanisms".
Wednesday
Nov-14-2007 PM2 (Joint meeting with 802.1):
· Presentation “Modified FCS/ARQ Behavior” – Todor Cooklev (07/2874r1)
Two
straw polls were conducted following the above presentation to understand
member interest in the techniques proposed in the above presentation --
1.
An approach to partition a packet
into ‘sensitive’ and ‘not sensitive’ parts, ascertain that the ‘sensitive’ part
arrived at the received intact and if it did, allow the ‘not sensitive’ part to
be propagated to upper layers without verifying if it did arrive intact.
2.
An approach to add an additional
encoding at the Transmitter and a corresponding decoding layer in the receiver
in order to benefit from inter-packet FEC.
The straw polls
and the corresponding results are :
Straw Poll-1
Allowing the 802.11 MAC layer to pass bit errors in the
“unprotected” part of the packet:
Should remain in the VTS SG PAR?
Yes: 19, No: 34
Straw Poll-2
Should the VTS SG PAR include a MAC-level FEC?
Yes: 26, No: 19
Based on
the straw polls, it is clear that member interest in the technique is low.
A joint
review of the VTS SG PAR submission (section 5.2 scope)
and the scope statement was modified to read as follows:
5.2 Scope of Proposed Standard: This amendment
defines enhancements to the 802.11 MAC for robust video streaming. The
MAC enhancements specified in this amendment are:
- Interworking with relevant 802.1 mechanisms
including, but not limited to, 802.1Qat, 802.1Qav and 802.1AS
- Link Adaptation Mechanisms
- Increased robustness in overlapping BSS
environments, based upon enhancing existing 802.11 mechanisms without the
requirement for a centralised management entity.
- Modified
EDCA timing and parameter selection for video transport
- Asynchronous
multicast streaming independent of power save modes employed by associated
stations.
Straw
poll on support for the above scope statement:
Do you think the scope statement in Slide#21 is appropriate for VTS SG?
Yes: 57, No: 4
Goal for the Jan 2008 802.11 Interim
meeting is:
Sep 2007,
Monday Sep-17-2007 PM2:
Wednesday
Sep-19-2007 PM2:
§ Update
document 07-1972/r5 with comments from the mid-week plenary discussion
§ Review the
document to verify of NesCom requirements are
addressed satisfactorily
At the
closing plenary the WG Motion to approve document 07-1972r6 and (a) forward it
to ExCom for approval and (b) forward it to 802.1avb
for consideration was amended. The amended motion reads "move to forward
the PAR and 5 Criteria document IEEE-802.11-07-1972r6 to 802.1avb for consideration".
A
following straw poll was conducted to understand what the Working Group members
prefer in terms of the contents of the VTS SG PAR. The choices were:
Option-A: the scope statement defines the general problem space – video streaming over 802.11.
The specifics of what is included and what is not is defined by the TG in a
“principles” or “requirements” document (3)
Option-B: the scope statement is detailed enough to
describe the specific areas that will be the focus of VTS (13)
Option-C: the scope statement defines the general
problem space but section 7.4 of the PAR document will include the specifics
(8)
None of
the above: (1)
The goal
for the Nov 2007 802.11 Plenary meeting is:
July 2007,
VTS Study Group Report
The VTS Study Group met at the following times -
Wednesday
July-18-2007 PM1:
Wednesday
July-18-2007 PM2 (jointly with 802.1AVB) :
§ Felix
(802.1AVB member) presented an outline of the 802.1av Stream Reservation
Protocol
The goal
for the Sep 2007 802.11 Interim meeting is to continue to discussions related
to the VTS SG PAR/5C document, complete it and forward the document for WG
approval.
May 2007,
VTS Study Group Report
The VTS Study Group met twice during the week - Tuesday May-15-2007 and
Wednesday May-16-2007 at the Fairmont The Queen
Elizabeth Hotel in
The goal for the July 2007 802 meeting is to continue to
discussions related to the VTS SG PAR/5C document, complete it and forward the
document for WG approval.
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