Re: [JXTA discuss] NEW Re: [JXTA discuss] Mobile IP

Giorgis,

Here is my understanding:

The peer can (and typically does) have multiple "endpoints" associated with it.
In your example, the IP address X would be one endpoint.  As the new IP
address Y becomes active, it also becomes an endpoint.  The JXTA message
routing associates the destination at the peer level, not at the endpoint level
that we as programmers typically have to deal with.  This allows messages to
transparently end up at the peer through endpoint X or endpoint Y without
either party in the communication having to know all the details.  Hence,
JXTA can be thought of as a network abstraction/independence layer.  Pretty
slick.

Check out the following for a nice example:

http://weblogs.java.net/blog/tra/archive/2005/02/the_power_of_jx.html

HTH,

Mike




On 7/16/05, Giorgos Georgakoudis <[email protected]> wrote:
> I read the paper but I did not get any clear answer. Ok, here is a scenario:
> 
> Someone is using a JXTA enabled PDA communicating in P2P JXTA network.
> Moving in the city, the PDA's IP changes from X to Y. What happens?
> 
> Guess 1: The Peer Advertisement that the PDA has issued still exists (as the
> timeout has not expired) so when other peers want to communicate with this
> peer they find a "new" route. There is some delay though. ( Will there be
> any missing packets granted they were routed according to the "old" route?
> Is there any caching of messages in the relay route?)
> 
> Guess 2: The peer is considered disconnected so it issues a new Peer
> Advertisement to manifest its existence in the JXTA universe. All previous
> communication is considered disconnected.
> 
> Giorgis Georgakoudis
> 
> ----- Original Message -----
> From: "Peter Fagerlund" <[email protected]>
> To: <[email protected]>
> Sent: Saturday, July 16, 2005 3:14 PM
> Subject: Re: [JXTA discuss] Mobile IP
> 
> 
> It do not affect the jxta protocols, the mobile is recognised through a
> jxme-proxy relay being the window in to the jxta world.
> 
> http://www.jxta.org/project/www/docs/JXTA4J2ME.pdf
> 
> /p
> 
> On 16 Jul 2005, at 10:24, Giorgos Georgakoudis wrote:
> 
> > Hello,
> >
> >
> > I would like to ask what happens in jxta when we have a mobile peer
> > that is moving through networks thus having a mobile IP address. How
> > does that affect the jxta protocols? Is the peer considered dead and
> > reconnected or otherwise? If there is any documentation mentioning
> > this or any other concepts please let me know.
> >
> > Giorgis Georgakoudis
> 
> 
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-- 
Mike Cumings