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[802SEC] CURRENT TALLY #1: +++10 Day EC Email Ballot (Closes no later than 29 April 2007)+++ Motion to approve the formation of the 802.11 Video Transport Stream (VTS) Study Group



 

802 EC Members,

 

This is the current tally for the ongoing 802 EC ballot:

 

Motion:  "To approve formation of an IEEE 802.11 Study Group to examine

issues related to delivery of Video Transport Streams (VTS) over IEEE

P802.11, with the intent to create a PAR and Five criteria to form a new

Task Group. The proposed PAR and 5C would be reviewed by the 802.1 Audio

Video Bridging Task Group (802.1AVB TG), and in addition both the 

802.1AVB TG and 802.11 VTS SG (and eventually the 802.11 TG, if formed) 

will meet jointly at IEEE 802 plenary meetings, unless mutually agreed 

not to".

 

         802 EC Motion:          Vote Categories                        

802.11 VTS Study Group        APP   DIS   ABS   DNV   Date

 

VC    Mat   Sherman          APP   -     -     -     04/19/07

VC    Pat   Thaler           APP   -     -     -     04/19/07

ES    Buzz  Rigsbee          -     -     -     DNV   -

RS    Bob   O'Hara           APP   -     -     -     04/19/07

TR    John  Hawkins          APP   -     -     -     04/19/07

01    Tony  Jeffree          APP   -     -     -     04/18/07

03    Bob   Grow             -     -     -     DNV   -

11    Stuart Kerry            APP   -     -     -     04/18/07

15    Bob   Heile            -     -     -     DNV   -

16    Roger Marks            -     -     -     DNV   -

17    John  Lemon            -     -     -     DNV   -

18    Mike  Lynch            APP   -     -     -     04/18/07

19    Steve Shellhammer      APP   -     -     -     04/18/07

20    Arnie Greenspan        APP   -     -     -     04/19/07

21    Vivek Gupta            APP   -     -     -     04/18/07

22    Carl  Stevenson        APP   -     -     -     04/19/07

ME    Geoff Thompson         Non-Voting              -

 

             Results          11    0     0     5     Return

16    Voter Pool              100%  0%    0%    31%   69%

 

Regards,

 

/ Stuart

 

_______________________________ 

 

Stuart J. Kerry 

 

Chair, IEEE 802.11 WLANs WG 

c/o: NXP Semiconductors,

1109 McKay Drive, M/S 48A SJ, 

San Jose, CA 95131-1706, 

United States of America. 

  

+1 (408) 474-7356 - Phone 

+1 (408) 474-5343 - Fax 

+1 (408) 348-3171 - Cell 

eMail: stuart.kerry@nxp.com 

_______________________________ 

 

-----Original Message-----

From: ***** IEEE 802 Executive Committee List *****

[mailto:STDS-802-SEC@ieee.org] On Behalf Of Stuart J. Kerry

Sent: Wednesday, April 18, 2007 2:10 PM

To: STDS-802-SEC@listserv.ieee.org

Subject: [802SEC] +++10 Day EC Email Ballot (Closes no later than 29

April 2007)+++ Motion to approve the formation of the 802.11 Video

Transport Stream (VTS) Study Group

 

Dear EC Members, 

 

The 802 EC Chair has delegated me to conduct this EC ballot on his

behalf.

 

This is a 10 day email ballot to make a determination on the withdrawn

motion which was deferred to an 802 EC email ballot, that was submitted

to the Closing Orlando March 2007 802 EC meeting: 

 

 

Motion:  "To approve formation of an IEEE 802.11 Study Group to examine

issues related to delivery of Video Transport Streams (VTS) over IEEE

P802.11, with the intent to create a PAR and Five criteria to form a new

Task Group. The proposed PAR and 5C would be reviewed by the 802.1 Audio

Video Bridging Task Group (802.1AVB TG), and in addition both the 

802.1AVB TG and 802.11 VTS SG (and eventually the 802.11 TG, if formed) 

will meet jointly at IEEE 802 plenary meetings, unless mutually agreed 

not to".

 

Moved: Stuart J. Kerry 

 

Seconded: Tony Jeffree

 

This ballot opens 11:59 PM ET Wednesday 18th, 2007 and closes when all

voting EC members have cast a ballot but no later than 11:59 PM ET

Sunday April 29th, 2007 if enough ballots have been cast for a decision 

to be made (more than 9 approves or disapproves).  

 

Executive Summary:

 

The proposed 802.11 Video Transport Stream (VTS) Study Group will focus

On enhancements within the 802.11 MAC/PHY layers to improve video streaming

performance over 802.11 links. The problem space is constrained to be

limited to issues unique to 802.11 and nothing more.

 

The 802.11 VTS SG will collaborate with 802.1AVB TG to ascertain that

802.11 specifications include support for all mechanisms specified in 

802.1AVB. If there are no mechanisms within 802.11 to support 802.1AVB, 

the 802.11 VTS SG will work jointly with 802.1AVB TG to specify the 

required mechanisms. This strategy is decided based on discussions with 

Michael Johas Teener (802.1AVB TG Chair) and Ganesh Venkatesan (Proposed 

Chair of the 802.11 VTS SG, if approved), as well as the two WG Chairs.

 

If the 802.11 VTS SG formation is approved by the EC, the tentative

Schedule for 802.11 VTS SG in May interim meeting in Montreal includes a

Presentation on 802.1AVB and 802.1AVB Transport Protocol followed by a 

discussion how 802.11 fits into this specification. These meetings are 

open to all 802 members. 

 

Approved in 802.11 WG:

 

.         802.11 WNG SC - Results: 59-3-11

 

.         WG - Results: 76-1-25

 

Details:

 

802.11 VTS SG is focused on enhancements within the 802.11 MAC/PHY

layers to improve the performance of video streams sent over 802.11 links. 

This is the main focus of the 802.11 VTS SG and is expected that the SG 

will spend 80% of its time in this activity. Some of the areas for study 

are (not in any specific order, not a complete list). Some of these 

topics are not fully explored yet:

 

1.     Enhancements to 802.11e mechanisms to render them effective for

transport streams (not all bits are equal

 

2.     QoS Management mechanisms  (permits QoS control from higher

layers)

 

3.     Optimizations to make medium access more deterministic

 

4.     Forward Error Correction techniques that are effective for 802.11

(specifically low reliability of the medium)

 

5.     Resiliency mechanisms to mitigate interference

 

6.     Heuristics for retransmission, packet drop, etc

 

7.     Channel dynamics estimation and adaptation techniques 

 

In addition (if there are currently no known mechanisms in 802.11) the

VTS SG, in order to guarantee that the wired and wireless sub-systems can

co-exist, will also work on the following items listed below. It is

anticipated that the items in this list will involve some level of joint

activity between 802.1AVB TG and 802.11 VTS SG. About 20% of the 802.11

VTS SG activity is expected here. Please note that the items listed below

Will be in 802.11 (if needed) but will be performed jointly with the experts

From 802.1AVB TG.

 

.         Mechanisms to support those specified by 802.1 Qat (stream

reservation protocol - bandwidth, latency, Admission Control and Time

Synchronization) and 802.1Qav (forwarding and queuing of time-sensitive

streams). Note that support for 802.1AS is already included in 802.11v.

 

.         Mechanisms to support 802.1Qas (time synchronization).

 

.         Any additional mechanisms that are specified in 802.1AVB

Requiring additional support in 802.11. 

 

A liaison will be established between 802.1AVB TG and 802.11 VTS SG. The

liaison will ascertain 802.1 AVB mechanisms and optimizations in 802.11

for video streaming are compatible and they work together to improve

streaming performance. This will be a 2-way communication - advancements in

802.1AVB will be made known to the 802.11 VTS SG members and advancements 

made in the SG made known to 802.1AVB TG members.

 

.         The documents generated by the two groups may be reviewed by

Each other (on a case by case basis), 

 

.         There may be presentations from one group to the other to

Provide rationale/motivation for an approach/solution and 

 

.         Members from each group will attend meetings of the other when

possible.

 

 

Regards, 

 

/ Stuart 

 

_______________________________ 

 

Stuart J. Kerry 

Chair, IEEE 802.11 WLANs WG 

 

c/o: NXP Semiconductors,

1109 McKay Drive, M/S 48A SJ, 

San Jose, CA 95131-1706, 

United States of America. 

  

+1 (408) 474-7356 - Phone 

+1 (408) 474-5343 - Fax 

+1 (408) 348-3171 - Cell 

eMail:  stuart@ok-brit.com 

_______________________________ 

 

 


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