The answer depends a lot on why you want to detect these nodes.
(Note that the set of nodes in radio range changes over time.)
If you are a host, you really are only interested in routers. You use RS to find them.
If you are a router, hosts will find you. Other routers will find you while they are starting up as hosts, but then the routing protocol takes over.
If you are an application and have a protocol that supports multicast (such as CoAP), just send your request to FF02::1.
That sounds like a MAC layer question, then.
If you are defining a new MAC scheme, it may be worthwhile thinking about good ways to interact with 6LoWPAN-ND, though — that might turn out to be a good cross-layer optimization.
(Again, note that “all neighbors in radio range” is not really well-defined, because links may not be bidirectional, but your TDMA scheme may address that problem.)
Not one that would be useful for managing interference.
But 6LoWPAN and NUD (and/or routing protocol mechanisms) will give a router a pretty good view of what hosts are talking to it with good link quality.
Probably, I need a MAC-layer mechanism for discovering neighbor in radio range for address the interference problem and built my TDMA scheduling.
Maybe the 802.15.4e provide a mechanism for do this.
Joseph, 802.15.4e doesn’t provide natively any mechanism for discover neighbor. You may use EB (Enhanced Beacon) for inform neighbor about the presence of nodes. However, you certainly need to repeat this phase continuously, cause of time-variance of connectivity between (in particular in mobile context).
I’m not sure, but maybe alternatively, you can use RS message for discovery neighbor
March 28th, 2011 - 10:26
thx
March 30th, 2011 - 11:57
No comment
April 13th, 2011 - 07:46
Please show your WEB-based support of 6LoWPAN.
July 7th, 2011 - 17:44
thanks.
July 27th, 2011 - 18:20
thanks.
November 25th, 2011 - 10:50
Thanks
May 23rd, 2012 - 09:53
Hi, I have a question (probably very trivial).
How (exchanging what packets) and in what step is possible for a node detect each neighbor in its radio range?
I don’t understand if the MAC layer must detect other devices in its radio range or if this is possible using 6LoWPAN-ND.
May 23rd, 2012 - 10:06
The answer depends a lot on why you want to detect these nodes.
(Note that the set of nodes in radio range changes over time.)
If you are a host, you really are only interested in routers. You use RS to find them.
If you are a router, hosts will find you. Other routers will find you while they are starting up as hosts, but then the routing protocol takes over.
If you are an application and have a protocol that supports multicast (such as CoAP), just send your request to FF02::1.
May 23rd, 2012 - 10:09
Thank you for the answer.
I need information of all neighbor in radio range of each node because I want create a proper TDMA multichannel scheduling.
May 23rd, 2012 - 10:16
That sounds like a MAC layer question, then.
If you are defining a new MAC scheme, it may be worthwhile thinking about good ways to interact with 6LoWPAN-ND, though — that might turn out to be a good cross-layer optimization.
(Again, note that “all neighbors in radio range” is not really well-defined, because links may not be bidirectional, but your TDMA scheme may address that problem.)
May 23rd, 2012 - 10:23
I was just thinking about a cross-layer optimization.
Hence, 6LoWPAN does not provide any mechanism for discover “all neighbor in radio range” ?
May 23rd, 2012 - 10:35
Not one that would be useful for managing interference.
But 6LoWPAN and NUD (and/or routing protocol mechanisms) will give a router a pretty good view of what hosts are talking to it with good link quality.
May 23rd, 2012 - 10:50
Probably, I need a MAC-layer mechanism for discovering neighbor in radio range for address the interference problem and built my TDMA scheduling.
Maybe the 802.15.4e provide a mechanism for do this.
May 23rd, 2012 - 12:30
Joseph, 802.15.4e doesn’t provide natively any mechanism for discover neighbor. You may use EB (Enhanced Beacon) for inform neighbor about the presence of nodes. However, you certainly need to repeat this phase continuously, cause of time-variance of connectivity between (in particular in mobile context).
I’m not sure, but maybe alternatively, you can use RS message for discovery neighbor
May 23rd, 2012 - 12:38
How can be RS used for discovery neighbor ( I imagine you are talking about radio range neighbor) ?