Sorry for the bump, but I've been able to keep a stable TCP-based XMPP
connection just fine as I move about the SF Bay area. I'm using AT&T.
__________________
Robert Quattlebaum
(Sent from iPhone)
On Apr 8, 2009, at 12:31 PM, "Thiranjith ." <[email protected]>
wrote:
Hi,
Can we use XMPP to talk to a client on a mobile device (e.g. PDA/
mobile phone) that is connected to the internet using 3G? From what
I understand, phones' end-point IP changes as they move around, and
generally they are behind the network operator's (At&T, Vodafone
etc) firewall.
Say that user 'A' sends a message to our mobile client. From what I
understand, the message will go through the XMPP server (e.g. Jabber.org
or our own) to find where our client is, so it can route the
message. How would the XMPP server know where to find our client in
the place? The IP our client used when registering with the server
could be different now because it could have moved around.
Does the mobile client need to periodically notify the server about
its IP? From what I understand, the BOSH technique described in http://xmpp.org/extensions/xep-0124.html#intro
is meant to address this, but it seems to work only if the entity
behind the firewall initiate the connection first (in this case, the
client running within the mobile phone).
Please correct me if I got all this wrong as I am new to XMPP, but I
would greately appreciate if anyone can explain how the xmpp server
finds the mobile client that is on the move. Does our sever needs to
implement that routing logic ourselves? Any articles explaining this
would also be great!
Thank you!
Thira
