hi benny and all, Still work in power consumption problem , analysis and tests of this problem (tests used Digital Multi meter MS8218 to collect reading for power consumption in mobile Nokia N73), results: - WCDMA standby (battery life time 8 days). - Connect access point by simple application (battery life time 3 days). - PJSIP demo GUI connect access point only (not register) (battery life time 3 days). This result means connect of access point consumption 5 days, Nokia suggest solution of power consumption by access point in VOIP application see : http://wiki.forum.nokia.com/index.php/TSS000650_-_Increasing_WLAN_power_efficiency_for_full-duplex_VoIP_and_Video_applications Question: how to apply this solution in PJSIP library? Thank very match. From: e-mohhassan@xxxxxxxxxxx To: pjsip at lists.pjsip.org Date: Tue, 24 Feb 2009 08:07:34 +0000 Subject: Re: Power consumption Thanks for benny, and L'm try to resolve this problem. Date: Tue, 24 Feb 2009 07:41:51 +0000 From: bennylp@xxxxxxxxx To: pjsip at lists.pjsip.org Subject: Re: Power consumption On Tue, Feb 24, 2009 at 6:43 AM, mohamed hassan <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 _________________________________________________________________ More than messages?check out the rest of the Windows Live?. http://www.microsoft.com/windows/windowslive/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090322/6e45a1ec/attachment-0001.html>
