Subject: Re: [Sip] draft-niemi-sip-subnot-etags-00.txt

From: xupeili 18916 <[email-masked]>
Date: Sun, 26 Mar 2006 11:47:50 -0600

Hi All,

If we are to consider optimization of notification, I suggest we consider more than optimization of the notification body, for example, the batch subscription refreshment mentioned in draft-wang-sip-brs-00.txt to get a more through solution.

regards
Peili Xu

----- Original Message -----
From: "Drage, Keith (Keith)" <[email-masked]>
Date: Sunday, March 26, 2006 10:24 am
Subject: [Sip] draft-niemi-sip-subnot-etags-00.txt

> (As chair)
> 
> http://www.ietf.org/internet-drafts/draft-niemi-sip-subnot-etags-
> 00.txt makes a proposal for:
> 
> "   The Session Initiation Protocol (SIP) events framework enables
>   receiving asynchronous notification of events related to SIP 
> systems.   This framework defines the procedures for creating, 
> refreshing and
>   terminating subscriptions, as well as fetching and periodic polling
>   of resource state.  These procedures have a serious deficiency in
>   that they do not allow state to persist over a subscription 
> refresh,   or between two consecutive polls.  Another related but 
> different   problem relates to the relative intolerance of the 
> framework to
>   interferences in networking connectivity of subscribers in long-
>   lasting subscriptions.  This document explains the problems in more
>   detail and discusses possible solutions."
> 
> This draft was discussed at the face-to-face meeting at IETF #65 
> but without conclusion.
> 
> We seek views on whether the SIP WG should adopt a draft in this 
> area as a charter item, and if so, what scope that charter item 
> should have.
> 
> regards
> 
> Keith
> 
> Keith Drage
> [email-masked]
> 
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