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Dear. Freedman
Thanks for your comment.
Please, see my answers below in
lines.
Best Regards
kihyoung
--------------------------------------------
Kihyoung Cho Research Engineer Standards & System Research Group Mobile Communication R&D Center, LG Electronics Inc. -------------------------------------------- Phone:+82-(0)31-450-2945 Mobile:+82-(0)11-738-3895 Fax:+82-(0)31-450-7912 e-mail: kihyoung@lge.com --------------------------- Dear Kihyoung
There are some things I don't
understand inn the document:
1. Does the initial request for scanning
comes form the BS or the MSS? Actually it should come from
both.
Of course the request
for scanning can come from both BS and MSS.
As is specified in the
current spec, the request for scanning can be initiated by the BS in
unsolicited manner. Even though the contribution does not contain the
example of scanning which is initiated by BS, the proposed method for
periodic scanning can come from both BS and MSS.
2. it seems to me that in the 802.16
framework, it is more natural to leave the BS with the responsibility to
allocate time for the scanning. So all the parameters in red should be
left out of the MOB-SCN-REQ from the MSS and left to the RSP message from
the BS.
I agree with you in that
the BS is responsible for allocating the time related to scanning, but I
think that the value can be negotiated. Those proposed parameters in the
MOB-SCN-REQ are the requested value by MSS, the final values will be
allocated by the BS as other parameters in the MOB-SCN-REQ
message. 3. I miss the report of the scanning
results, namely the measurement results. It is important, IMHO that
in addition to the CINR values, the MSS should report also the absolute
RSS (received signal strength) values in dBm, which are measured anyway.
They provide more information to the BS and may be more reliable than the
CINR.
If the result of the
measurement should be reported to the BS, the other measurements are also
possible criteria for the decision of handover, such as RSS, BER, and
RTT. I think that, among those other measurements, the absolute RSS
is the most efficient, because it can be measured faster(no
decoding). In addition, the RSS is used in other standard.
However, I'm doubt that the report of two measurements is necessary. I'm
afraid that the report of CINR and RSS can give duplicate information
to the BS, because, those two parameters are much corrleated. I
think that the issue of the RSS should be discussed further
to be reached in the consensus.
----- Original Message -----
From:
kihyoung
Sent: Sunday, June 13, 2004 11:27
AM
Subject: [STDS-802-16-MOBILE]
[STDS-802-16-MOBILE][Handoff] an MSS's periodic scanning
In last telecon, it was dicided to harmonize two contributions(A method of scanning neighbor BSs periodically.pdf & BS initiated Handover with early scanning.pdf,) because. those two contributions are authored by same contributors and also discuss similar category, scanning optimaization. In this handover ad-hoc, we propose only one document with some minor revisions. Please find the uploaded file in the server. The name of the contribution is.. A method of scanning neighbor BSs periodically-rev1.pdf (http://wirelessman.dyndns.org/cgi-script/CSUpload//upload/handoff%252edb/A%20method%20of%20scanning%20neighbor%20BSs%20periodically%2drev1.pdf) The flollowings are the summary of the contribution. To provide reliable CINR information, an MSS should continuously measure CINR of the neighbor BSs and average the measured CINR for a given duration. In the current specification, the MSS should exchange SCN-REQ/RSP messages with the serving BS whenever the MSS tries to scan. So the frequent exchange of Scanning related messages cause too much overhead and result in wasting of bandwidth and battery power. In this contribution, we propose a method of enabling an MSS to scan neighbor BSs periodically to reduce the number of scanning request and response message. Please review the contribution and discuss it at coming telecon. B.R Kihyoung -------------------------------------------- Kihyoung Cho Research Engineer Standards & System Research Group Mobile Communication R&D Center, LG Electronics Inc. -------------------------------------------- Phone:+82-(0)31-450-2945 Mobile:+82-(0)11-738-3895 Fax:+82-(0)31-450-7912 e-mail: kihyoung@lge.com --------------------------- |
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