Minutes of the second Relay TG MPDU construction adhoc
conference call
Wednesday April 11 2007
(13:00 GMT, 8:00
CDT,
9:00 EDT, 21:00 P.R.C./R.O.C.)
Chair: Jeffrey
(Zhifeng) Tao
Participants:
|
Kanchei (Ken) Loa
|
Hang Zhang
|
Yousuf Saifullah
|
|
Chie-Ming Chou
|
Mary Chion
|
Haihong Zheng
|
|
Yung-Ting Lee
|
Youn-Tai Lee
|
Derek Yu
|
|
Ranga Reddy
|
Hongyun Qu
|
|
|
|
|
|
|
|
|
|
The meeting was started at 13:00 GMT (9:00
EDT) on April 11 2007
and chaired by Jeffrey Z. Tao. The
agenda distributed on Wednesday April
10 2007 was followed.
1. Roll call
Roll call was conducted at the beginning of the adhoc and participants listed above were identified.
2. Brief review of contributions
- 07/285
- This
is a new contribution submitted as a response to the call for
comment/contribution with deadline of April 6.
- M. Chion
provided a brief overview of the contribution, which proposes a new
signaling type II acknowledgement header.
- Y. Saifullah
confirmed that this contribution has no conflict with the signaling type
II bandwidth request header accepted into the baseline during the Orlando
meeting.
- D. Yu and H. Zhang raised the issue of whether 3-bit “Extended Type”
field in the proposed signaling type II message would be sufficient or amenable
to any future extension.
- M. Chion
confirmed that some fields in 07/287 can be shortened, if the “Extended
Type” field needs to be extended.
- Y. Saifullah
explained that 3-bit should be sufficient for “Extended Type” field, as
there are not many usages scenarios reported in all the contributions that
have been dealt with in the TG so far.
- 07/267r1
- H. Qu
provided a brief overview of an updated version of this
contribution.
- The
contribution intends to clarify the MPDU construction format, which both supports
the notion of per-hop tunneling and provides a means to implement source
routing.
- H. Zhang asked for a comparison
between the subheader approach for source routing and the solution proposed
in 07/267.
- Y. Saifullah
questioned the necessity and benefit of performing per-hop tunneling.
- K. Loa, Y. Saifullah
and H. Zheng exchanged the opinion on
source routing versus table-based routing and compared the pros and cons
of both approaches.
- Y. Saifullah
and H. Zheng further suggested using MAP to
carry the route information for source routing.
3. Discussion on contribution handling
procedure.
- It has
been agreed upon in this teleconf that
contributions belonging to this adhoc will be
discussed and handled in the order of increasing document numbers.
- It has
been further agreed upon in this teleconf that
07/198 will be dealt with before 07/195, given the dependence of the
latter on the former. That is, the adhoc will handle contributions in the following order
[07/198, 07/195, 07/217, 07/221, 07/256, 07/257, 07/267, 07/285]
4. Detailed contribution discussion
- 07/198
- Y. Saifullah
and H. Zheng
suggested using CID semantics instead of a separate bit to
distinguish the relay MAC header.
- To
distinguish relay MAC header from the legacy 802.11e MAC header, 3 approaches have been identified
in the teleconf:
i. Use
“RSV” bit in the legacy 802.11e header
ii. Use
“Mesh subheader” bit in the TYPE field
iii. Use
CID semantics
- Y. Saifullah
and H. Zhang exchanged
discussion on the pros and cons of using extended subheader to fulfill
the same function. It has been
identified that the extended subheader approach would cause additional
overhead and does not utilize the current GMH very efficiently.
5. Action items
- Authors
of 07/267 shall upload the updated version and notify the adhoc group once the new version is available on the
server.
- Authors
of 07/198 shall address the comments raised during this teleconf and update the adhoc
group of the revision.
6. Next adhoc
meeting planning
Next teleconference call is tentatively scheduled on Monday April 16 2007 (13:00 GMT, 8:00
CDT, 9:00 EDT, 21:00 P.R.C/R.O.C, 22:00 Korea/Japan).
The teleconference was adjourned at 14:10 GMT (10:10am EDT).