[Standards] mobile strengths and weaknesses

Peter Saint-Andre stpeter at stpeter.im
Tue Mar 25 20:28:09 UTC 2008

Fabio Forno wrote:
> Thanks for the update. Some notes below
> On Sat, Mar 22, 2008 at 1:37 AM, Peter Saint-Andre <stpeter at stpeter.im> wrote:
>>  2. XMPP requires a persistent TCP connection, which leads to battery
>>  drain - as the network connection is required always when client is
>>  online, the WiFi / GPRS / 3G connection is required as well. The "always
>>  active" radio transceiver will consume a lot of power and drain the battery.
>>  - OMA IMPS has a solution for this: the client can turn off the
>>  signalling channel when the client is not in active use (chatting/etc),
>>  and tell the server to fall back to SMS-based signalling. When the
>>  server receives new messages that are destined for the client, it will
>>  inform the client (using a special SMS message) that content is
>>  available. The client will then resume the network + normal signalling.
>>  (PSA NOTE: this is the "session pause" or "session hush" idea...)
> We were talking last week about the same idea with the people at Sapo.
> The SMS option is possible also with XMPP since any mobile application
> (J2ME, Symbian or the coming Android) can listen for incoming SMSes on
> a given port and be automatically scheduled. Besides the session pause
> feature, 

So do you think that we need to define a generic session pause feature,
or is it handled well enough already in BOSH?

> with BOSH again it's possible to stop the connection and
> re-establish it when we receive an SMS. However this is feature for
> carriers, since I don't think that free server operators or users will
> pay the cost of an SMS for almost any incoming message.
> Unfortunately this is design flaw  of GPRS/ 3G networks, and we have
> to live with it unless there won't be install battery refills with
> fuel cells ;)

Heh, yeah.


Peter Saint-Andre

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