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

hello mohamed abdelaziz

thanx for your reply:) 

but why relay peer can send messege back to the peer, which have been changed IP address. In my opinion, jxta app sends and receives packege based on IP in PlatFormConfig. There is no a mechanism to detect IP address dynamicly, so after changing IP address, the peer still send packege based on IP used before. 

Does jxta code overcome this problem? 
btw: is there a Platformconfig in jxme as it in jxta-java?

thanx a lot and looking forward to your reply:) 
	

======= 2005-07-19 10:01:00 您在来信中写道：=======

>马里 wrote:
>
>>Hi mohamed abdelaziz
>>
>>I still feel a bit confusing about your reply.
>>  
>>
>>>A peer (jxme, or otherwise) can be mobile about the network, without
>>>having to worry about it's new address.
>>>    
>>>
>>Does peer in jxta-java and jxta-c can enjoy mobiliy as well? (relay mode or http directly)
>>  
>>
>A relayed (jxta-c, jxta-java* peer can enjoy mobility. otherwise there 
>some work to be done in the tcp, and http transport to handle runtime 
>interface address changes, once that is done, a peer can enjoy mobility 
>all the way around.
>
>>  
>>
>>>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
>>>    
>>>
>>Does peer can be re-connected sucessful, in the case of jxta-shell without relay, if I changed IP address directly without modifying it in PlatformConig.
>>  
>>
>
>only in relayed mode.
>
>Mohamed
>p.s. your email font setting produce difficult to read messages due to 
>size and spacing
>
>-- 
>http://blogs.sun.com/roller/page/hamada
>http://weblogs.java.net/blog/hamada
>
>
>>thanx very much
>>
>>
>>	
>>
>>======= 2005-07-18 15:21:00 您在来信中写道：=======
>>
>>  
>>
>>>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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>>
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>>
>>　　　　　　　　致
>>礼！
>>
>>				
>>　　　　　　　　马里
>>　　　　　　　　[email protected]
>>　　　　　　　　　　2005-07-19
>>
>>
>>
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　　　　　　　　致
礼！
 
				 
　　　　　　　　马里
　　　　　　　　[email protected]
　　　　　　　　　　2005-07-19