[pjsip] Power consumption

[Fabio Pietrosanti (naif)]

Please try to use the Nokia Energy Profiler:
http://www.forum.nokia.com/info/sw.nokia.com/id/324866e9-0460-4fa4-ac53-01f0c392d40f/Nokia_Energy_Profiler.html
http://silpol.blogspot.com/2008/01/let-power-be-with-you.html

With and without PJSIP running and then being online/offline, being 
during call and without call in progress.

Fabio

mohamed hassan wrote:
> Thanks for benny, and L'm try to resolve this problem.
>
> ------------------------------------------------------------------------
> Date: Tue, 24 Feb 2009 07:41:51 +0000
> From: bennylp at teluu.com
> To: pjsip at lists.pjsip.org
> Subject: Re: [pjsip] Power consumption
>
> On Tue, Feb 24, 2009 at 6:43 AM, mohamed hassan 
> <e-mohhassan at hotmail.com <mailto:e-mohhassan at hotmail.com>> wrote:
>
>     Hi all,
>     I'm working in development VOIP project but I'm found big problem,
>     end battry quickly in N73 (3hours) mobile and project during test
>     not send and recived any data, I'm used PJSIP library, used
>     Performance Investigator in carbide c++ to tracking power
>     consumption and used Nokia Energy Profiler, but not access to
>     thread responsible power consumption.
>     what's work to solve this problem?
>
>
> Thanks for the report. First of all, I got to admit that we have not 
> done extensive power profiling ourselves, but having said that, I 
> think we've done all we can to improve power consumption, for example, 
> we have zero polling on the Symbian target. So it could be that the 
> poor power consumption that you observed is a characteristic of 
> VoIP/SIP applications in general and not PJSIP in specific.
>
> Lets discuss where the power is consumed in PJSIP, assuming the 
> application is idle. As I mentioned, we used zero polling on Symbian, 
> so if the application is idle then basically PJSIP is stopped 
> completely (no running code in the background as such).
>
> First to check is the sound device. The 
> pjsua_media_config.snd_auto_close_time setting can be used to 
> automatically close the sound device when it's not used, but by 
> default this feature is disabled. Check that you've enabled it in your 
> application.
>
> Then there are these keep-alive stuffs. If you have SIP registration, 
> then of course we would need to periodically re-register, and apart 
> from that, there is also keep-alive packets that are sent to keep the 
> connection open. Default is every 15 seconds for UDP 
> (pjsua_acc_config.ka_interval) and 90 seconds for TCP/TLS 
> (PJSIP_TCP_KEEP_ALIVE_INTERVAL and PJSIP_TLS_KEEP_ALIVE_INTERVAL).
>
> If you use STUN/ICE, then the media sockets will also send keep alive 
> packets, approximately every 15 seconds too (PJ_STUN_KEEP_ALIVE_SEC, 
> PJ_TURN_KEEP_ALIVE_SEC, and PJ_ICE_ST_KEEP_ALIVE_MIN settings).
>
> All these keep alive packets takes up battery power, but it's just 
> something that we need to do. You can disable them if you want (but at 
> your own risk of course).
>
> And then of course the power spent to maintain the access point 
> connection too.
>
> It would be great if you come back with new data after you optimize 
> your application based on above.
>
> cheers
>  Benny
>
>
> ------------------------------------------------------------------------
> See all the ways you can stay connected to friends and family 
> <http://www.microsoft.com/windows/windowslive/default.aspx>
> ------------------------------------------------------------------------
>
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