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

Giorgos,

A peer (jxme, or otherwise) can be mobile about the network, without 
having to worry about it's new address. Addressing within the JXTA 
network is by a peer's endpoint, which is resolved to an access point 
advertisement (an APA describes a peer's physical and virtual 
endpoints), if a peer changes it's physical or virtual endpoint, such 
change is reflected within the access point advertisement, and is 
automatically re-resolved when connection failures occur.   In relayed 
situations where the relay remains the same, a change in physical 
addresses has no effect, whereas in direct connections, or when a change 
to a different relay occurs, such change would manifest itself as slower 
than usual delivery of messages to the mobile peer, or in an exception 
when attempting to send more than 3 messages before the new Access Point 
Advertisement is resolved.  Also keep in mind that peer routes are 
resolved by a peer's advertisement or access point advertisement (via 
discovery), through the EndpointRouter resolution protocol, of through 
forward routes which are part of delivered messages.


Cheers,
Mohamed




Giorgos Georgakoudis 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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