RE: [RRG] Mobility frequency

[<hannu.flinck@nsn.com>]

Hello Ran, 

There has been a lot of work in the IETF and IRTF that shows that
feasibility to use IP layer protocols to implement fast handovers. 

Please notice this one as well. There are many more similar results.

http://ieeexplore.ieee.org/iel5/10360/32961/01543800.pdf?isnumber=&arnum
ber=1543800
 
Even if mobility is persistently highly  exciting research question, I
believe the problem of this group is without mobility a challenging one.



Regards Hannu


>-----Original Message-----
>From: owner-rrg@psg.com [mailto:owner-rrg@psg.com] On Behalf 
>Of ext Randall Atkinson
>Sent: Thursday, February 21, 2008 15:38
>To: Routing Research Group
>Subject: [RRG] Mobility frequency
>
>An earlier separate comment by Scott Brim triggered this thought...
>
>Some in the IETF (historically at least, maybe not now) have 
>wanted to have IP mobility work well with many roaming events 
>in 1 minute.
>
>There is a useful and interesting NATO technical report [1] on 
>IP mobility that concludes that current IP mobility schemes 
>don't really work well for a device that moves its (layer-3) 
>location more often than once every few minutes.  Their 
>conclusion, as I recall, was that when considering mobility 
>one ought to be trying to use Layer-2 mobility (e.g. radios, 
>satellites) for smaller and high frequency movements (e.g. 
>movements on the scale of seconds) and using layer-3 mobility 
>much less frequently (e.g. movements on the scale of several 
>minutes or longer).
>
>That NATO report seems pretty sensible to me.  If one 
>considers a classical radio LAN, a node typically can move for 
>a while/distance before one needs to find and engage with a 
>new uplink base station.
>At least some mobile phone technologies also support the idea of
>L2 mobility (e.g. between individual cells, but within one 
>super-cell) where an L3 handoff is only 
>needed/applicable/useful between super-cells.
>
>The question of how much mobility a proposal ought to support, 
>if any at all, seems like a good one to ponder.
>
>Yours,
>
>Ran
>rja@extremenetworks.com
>
>[1] A search engine likely can find a PDF copy of this; I 
>don't have one to hand this minute.
>
>--
>to unsubscribe send a message to rrg-request@psg.com with the 
>word 'unsubscribe' in a single line as the message text body.
>archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
>

--
to unsubscribe send a message to rrg-request@psg.com with the
word 'unsubscribe' in a single line as the message text body.
archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg