We discussed the following items:
1. The joint
draft proposal: Preamble_adhoc_structure_v0.1.doc
There was a
long discussion over the proposal, which proved to be very
useful. It is not clear that we have reached a
consensus, however only members from Samsung have not agreed
with the proposal. The agreement is that we will not change the
existing preamble structure in order to maintain backward compatibility, but
introduce a Sync symbol (or postamble) which has a time domain repetition
structure. The Sync symbol is transmitted in certain interval (the exact
interval is to be defined). There are several different opinions on the
location of the Sync symbol, the exact location is to be defined. This
Sync symbol shall be transmitted mandatory by BS, but it is optional for MSS.
It is up to MSS to decide whether it wants to take advantage of this Sync
symbol. The actual sequence design depends on the outcome of
sequence design harmonization. It shall use whichever sequences chosen for the
existing preamble design, possible different lengths.
Raja proposed another
revision based on this proposal to add group ID in additional to the common
Sync sequence.
Wen Tong will work with others to provide a revision to reflect
today's CC agreement. Samsung agreed to review the revision. The
document combining with the consensus on sequence design will be used
as the first draft for Aug. 17 comment submission.
2. Sequence
harmonization status
We discussed how to
evaluate the sequences. The following are the criteria suggested: low PAPR,
low cross-correlation, complexity, consistency with the existing preamble
sequence. The simulation will use the existing preamble
structure.
Jeff Zhuang agreed to
work with others to generate performance matrices for proposed sequences
before Monday CC. It is agreed to continue offline Email discussion. We need
to work hard on this to reach a consensus by Monday night.
3. Comment on
"reference signaling" from LGE
Bin-Chul Ihm presented the proposal on "reference signal",
several members objected to use guard band for any other purpose.
There was no support for this proposal. Bin-Chul
Ihm will do further explanation to seek support before
Aug. 17.
4. Next
CC
We agreed to add another
CC to discuss sequence design.
Monday, Aug 16 ---
20:00-22:00 USA pacific time, 12:00 for Seoul, 6:00 for TelAviv, 23:00 for
Ottawa
The conference bridge is:
1+(613)7650160
Pass code: 3958089#