Further on this.
My understanding is that 802.15.5 is NOT being used by anyone.
Zigbee has their own mesh methodology. I do not have the documents, but
as it was described to me, it is based on path discovery after network
admission.
There is a new Mesh Under Routing Interest Group in 802.15, with a call
for submissions for for the July 15th meeting. This IG is not yet on
the document server, it seems the submissions are being posted under the
WNG SG:
https://mentor.ieee.org/802.15/documents?is_group=wng0
So far there is one submission:
https://mentor.ieee.org/802.15/dcn/12/15-12-0268-01-wng0-l2-routing-demands-for-fan.ppt
Mesh under IS out of scope for IETF and 6lowpan. It IS in scope for
802.15. Unfortunately to play in IEEE, you have to pay. That is attend
a meeting. Though the document server is publicly available.
Oh the chair for this study group is Clint Powell, [email protected].
On 06/04/2012 11:40 PM, Myung Jong Lee wrote:
Hi Damien and all,
Though I am not an active member for 6lowpan, I just like to note that
there is a "mesh under" routing standard, IEEE 802.15.5 a recommended
practice, completed in 2009. You may take a look at it. It is built on
IEEE 802.15.4b and sitting below IP layer. I believe it could be
one of the feasible approaches for mesh under technologies. For the
details, you may refer to the standard itself or the paper, " IEEE
802.15.5 WPAN mesh standard-low rate part: meshing the wireless sensor
networks," IEEE JSAC, Vol 28, No. 7, 2010 .
Thanks,
Myung
On Tue, Jun 5, 2012 at 9:10 AM, Samita Chakrabarti
<[email protected]
<mailto:[email protected]>> wrote:
Hi Damien,
Please find responses in-line.
------------------------------------------------------------------------
*From:* [email protected] <mailto:[email protected]>
[mailto:[email protected]
<mailto:[email protected]>] *On Behalf Of *Damien Roth
*Sent:* Monday, June 04, 2012 5:03 AM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [6lowpan] Mesh under routing and Neighbor Discovery
Hello,
I continue my investigations the neighbor discovery protocol
for 6LoWPAN (draft-ietf-6lowpan-nd-18), and there is one point
that remains unclear to me.
With 6LoWPAN, two routing mechanisms can be used : route over and
mesh under. Everything is OK with the route over mechanism but I'm
locked with mesh-under. In mesh-under routing, there is only two
entities, the 6LBR (border router) and the hosts. Multiple hops
may be needed to for hosts to reach the 6LBR.
====> In mesh under case, the assumption is that all hosts are
directly IP-reachable from 6LBR. How the packets are flown from a
host to the 6LBR ( using a L2-mechanism) is out of scope of the
document. Currently I don't know of L2-routing protocols for
mesh-under network - however, there might be some proprietary ones.
My problem is in multihop configuration : how the multicast Router
Solicitation messages, used by the neighbor discovery protocol,
can reach the 6LBR ?
Does it depends on the routing protocol used ?
====> Please check the section 10 (Examples) to get an
understanding how the routers and hosts bootstrap in the multi-hop
6lowpan networks. Initial multicast RS is sent only to the local
subnet and taken care by the local 6LR router in case of
route-over scenario.
-Samita
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