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Hi
Vasu,
In the
current FBSS design, the data flow continuity between the old and the new Anchor
BSs during fast BS switching is provided through backhaul, similar to 1xEV-DO or
1xEV-DV. In this case, there will not be air-interface standards impact
for different types of network configuration.
If as
you suggested, MSS is to provide feedback information on data flow starting
point at the new Anchor BS, then a new UL feedback mechanism over-the-air is
required. Note that this scheme is only benefitial for the specific network
implementation where data is multicast to all BSs in the active set. I
do see the merit of this approach since it
will avoid the switching delay incurred by inter-BS signallng. Having said
that, we do need to figure out the feedback mechanism and the content of the
feedback that can support such approach.
Regards,
Mo-Han
Mo-Han,
I do
wonder though, whether there is a potential standards impact. The examples
provided seem to assume that the current anchor will indicate the point in the
data stream, over a backhaul, from which the new anchor should
initiate transmission to the MSS. However, if the MSS is used as a relay
for this information, over the air, we may reduce the inter-BS signaling when
all BSs share (buffer) the same data. Basically, in this scenario, the
MSS informs the new anchor as to the point in the data stream from which
data transfer should continue.
regards
Vasu
PS:
Since I'm joining the discussion late, please excuse any misunderstanding I
might have of the current protocol.
Hi
Jay and Inkyu,
I
echo Mary's reply below.
Regards,
Mo-Han
Hi, Jay nad
Inkyu,
This is Mary
Chion. Sorry about the late reply.
In FBSS, only one BS will be communicating with the MSS at
any time instance (the anchor BS). The BS can choose one of the BS in the
active set to be the anchor BS through MOB-BSHO-REQ/RSP message.
Once the MSS confirms the HO with MOB-HO-IND, The MSS should only expect
trasmission from the anchor BS.
Regarding the question of which
BS have the data, it's really an implementation issue, it also
depends on what kind of network architecture you will be using. If your
network architecture includes a control point for the BSs (i.e. BSC),
the control point can
buffer the data and only send to current anchor BS. When a new anchor BS
is chosen, the conotrl
point will just redirect the traffic. With distributed
system, the anchor BS should be
resposible for the data. When the ahcnor BS is changed, the old
anchor BS can forward data to
the new anchor BS. The above scenarios are only examples, the
implementatios can be different from each company and should not be
specified in the standard.
Regards,
Mary
To my knowledge, all BS's in an active set share same
data for an MSS.
Am I right?
Regards,
Inkyu Paek
hanarotelecom
----- Original Message -----
Sent: Monday, August 02, 2004 5:26
PM
Subject: [STDS-802-16-MOBILE]
[Harmonization] Question for FBSS
Dear MO-han
I have a quick question for my
clarification.
I wonder which BSs are responsible for having Data
for an MSS in FBSS(Fast BS Switching).
Do all BSs in active set have to share same data for
an MSS?
OR,
Only a serving BS has data for an MSS then forwards
the data to an anchor BS?
Thanks in advance.
Best
regard.
jay
--------------------------------------------
Yongseok
(jay) Jin
Research Engineer
Standards & System
Research Group
Mobile Communication R&D Center, LG Electronics
Inc.
--------------------------------------------
Phone:+82-(0)31-450-7187
Mobile:+82-(0)11-9953-3149
Fax:+82-(0)31-450-7912
e-mail: jayjay@lge.com
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