Subject: [Simple] comments on draft-houri-simple-interdomain-scaling-optimizations-00

From: Qian Sun <[email-masked]>
Date: Wed, 11 Jul 2007 12:26:42 +0800

Hi,

To timed presence optimization, I can't see why watcher filtering specification requires enhancements. The following filter is enough, the notification can be suppressed if the timed-status does not change. And the watcher application may automatically switch the subscription on or off according to the interval specified by received <timed-status>.

<filter id="123" uri="sip:[email-masked]">
  <trigger>
     <changed>/presence/tuple/timed-status/basic@from</changed>
     <changed>/presence/tuple/timed-status/basic@until</changed>
  </trigger>
</filter>

I guess it is in the same situation with "notify pause", just as Jonathan commented at http://www1.ietf.org/mail-archive/web/sipping/current/msg13149.html :
"Another thought; you might be able to achieve this pausing with the existing filtering mechanisms (RFC 4661). If you specify a filter that basically includes nothing and delivers to you notifications on no events, then you'll probably get the same effect as your draft. Have you looked at that?"

Cheers,
Qian

_______________________________________________
Simple mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/simple