[STDS-802-16] Fw: Re: Re: [STDS-802-16] [MMR-AH-UM] Some comments for jointcontributions ofusage model
Hi Aimin,
I totally agree that there should be some rules to allow the handover
procedure to happen without bothering the upstream RSs or BS. But I think
it may be an mobile protocol instead of a routing protocol. From my
knowledge, routing protocols are meant to exchange routing information
e.g., OSPF, BGP, Rbridge, AODV....etc. I think these routing protocols are
too complicated to be implemented in the master-slave like and connection
oriented MMR networks, and also the MMR-BS can learn the whole MMR topology
including the routing information or it can authorise some particular RSs
to do that.
Best Regards,
Jen-Shun Yang (Tonny Yang)
ITRI/ICL
TEL: +886-3-5914616
email: jsyang@itri.org.tw
Aimin Zhang <zam@huawei.com> -
2006/06/15 04:47 PM
收件人： "jsyang@itri.org.tw" <jsyang@itri.org.tw>,
副本抄送： "john_lee@huawei.com" <john_lee@huawei.com>,
主旨： Re: [STDS-802-16] [MMR-AH-UM] Some comments for
jointcontributions ofusage model
Jen Shun,
Maybe we are going into technical details. :)
I want to clarify that the route I meant in the previous mail is the path
from the BS to the RS which an MS associated to, not the one from the
serving RS to the target RS.
In a multi-hop relay system, when an intermediate RS (say RS0) detects a
better RS (RS1) for itself to connected to it can just make a handover
request to its serving RS (RS2), RS2 may agree the handover request of RS0
without bothering the upstream RSs or BS.
So there should be some rules to allow the above mentioned procedure to
happen. I think this rule is a routing protocol on RS.
Best Regards,
Aimin
Hi Aimin,
Thanks for your comments.
I don't mean all mechanisms must be centralized controlled. At least, the
HARQ might not appropriate to be centralized controlled. I merely mean
that since 802.16 networking is a connection oriented network, centralized
relay path helps the MMR-BS to coordinate information exchanges with
numerous RS. Regarding MS handover, I think we can apply your "combined
architecture" idea if I didn't misunderstnad your meaning, but there is
still no need any routing protocol in each RS because the target RS/BS and
original RS/BS have been well determined by MS and/or RS and/or MMR-BS
during MS moving.
Best Regards,
Jen-Shun Yang (Tonny Yang)
ITRI/ICL
TEL: +886-3-5914616
email: jsyang@itri.org.tw
Aimin Zhang <zam@huawei.com> -
2006/06/15 03:11 PM
收件人﹕ "jsyang@ITRI.ORG.TW" <jsyang@ITRI.ORG.TW>,
副本抄送﹕ "john_lee@huawei.com" <john_lee@huawei.com>,
主旨﹕ Re: [STDS-802-16] [MMR-AH-UM] Some comments for joint
contributions ofusage model
Hello Jen Shun,
Do you mean a centralized controlled system architechture? If the number
of hops is more than two, there will be a lot of signaling needed to
collect necessary information for routing or handover, etc. Because there
are always a lot of MS moving simultaneously from one RS-cell to the other
RS-cell, so the signaling overhead might become very huge and a lot of
bandwidth will be used .
I think it better to have a combined architechture. The last 2 hops can be
centralized controllized by a high capability RS, however, the first few
hops from MMR-BS to this RS should be distributed controlled.
In the combined architechture, an MS can be connected to any RS with
different capability. However, the intermediate-RS should have better to be
high capability to support distributed controlled.
Best regards,
Aimin
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Hi Saravanan,
Thanks for your supporting. Actually, I also think the term of "routing"
is not appropriate to be adopted in any 802.16j documents, because it is no
need to have routing protocol in RS.
What do you think?
Best Regards,
Jen-Shun Yang (Tonny Yang)
ITRI/ICL
TEL: +886-3-5914616
email: jsyang@itri.org.tw
"Saravanan Govindan" <Saravanan.Govindan@sg.panasonic.com> -
2006/06/15 02:07 PM
收件人﹕ <jsyang@ITRI.ORG.TW>,
<STDS-802-16@listserv.ieee.org>, ..
副本抄送﹕ ,
主旨﹕ RE: [STDS-802-16] [MMR-AH-UM] Some comments for joint
contributions of usage model
Hi Jen-Shun,
I agree that a difference between mesh and relay is based on path
selection. Centralized relay path helps the MMR-BS coordinate exchanges
with the numerous RS.
In particular, I think the revision you propose below addresses this point.
Cheers,
Saravanan Govindan
-----Original Message-----
From: Jen-Shun Yang [mailto:jsyang@ITRI.ORG.TW]
Sent: Wednesday, June 14, 2006 1:47 PM
To: STDS-802-16@listserv.ieee.org
Subject: [STDS-802-16] [MMR-AH-UM] Some comments for joint contributions of
usage model
Dear Jerry,
Thanks for your great efforts.
Regarding the Chapter 5.3 "Types of Routes", I would like to have the
comments as below:
1. To distinguish MMR’s topology from Mesh topology, it is not clear if we
said the MMR’s topology is only tree-like topology; because the mesh
network could be a tree-like topology too.
2. Actually, I think the "centralized relay path selection by MMR-BS" is
the major difference to distinguish MMR’s topology from Mesh topology, and
we should not allow the distributed routing protocols implemented in each
RS due to the connection oriented characteristics in MMR. It will worsen
the complexity if we allow the implementation of distributed routing
protocols.
3. Therefore, I would like to make a revision to the following sentence
written in the second paragraph of chapter 5.3.
Original sentence:
It should be noted that even when multiple routes are enabled between the
RSs, the overall topology is still tree-like because all data
communications are between the MMR-BS and MSs and this usage does not
violate the scope as defined in 802.16j PAR.
Revised sentence:
It should be noted that even when multiple routes are enabled between the
RSs, the overall topology is still tree-like and applying centralized relay
path selection by MMR-BS, because all data communications are between the
MMR-BS and MSs and this usage should not violate the scope as defined in
802.16j PAR.
Best Regards,
Jen-Shun Yang (Tonny Yang)
ITRI/ICL
TEL: +886-3-5914616
email: jsyang@itri.org.tw
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