Changes between Initial Version and Version 4 of Ticket #833


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Timestamp:
Aug 11, 2009 2:53:22 PM (15 years ago)
Author:
nanang
Comment:

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  • Ticket #833

    • Property Cc johan lantz added
    • Property Milestone changed from release-1.3 to release-1.4

  • Ticket #833 – Description

    initial v4  
     1Scope: 
     2 - Run-time configurable session interval (Session-Expires header) and minimum session interval (Min-SE header) per account basis. 
     3 - Refresher performs refreshes at half of session interval, and refreshee sends BYE slightly before session expiration. 'Slightly' == minimum of 32 seconds and one-third of session interval. 
     4 - Session interval negotiation, i.e: generate/handle 422 when SE less than Min-SE. 
     5 - Works even when only one UA in a dialog supports Session Timer (and it's not listed in Require header). 
     6 - Able to use Session Timer even when peer doesn't support Session Timer, perform refreshes by and for itself. 
     7 - Able to adapt when Session Timer is turned-off. 
     8 
     9Limitations: 
     10 - Refreshing session using UPDATE hasn't been supported yet. 
     11 - Refreshing session will always restart the media session (even if the media session is not modified). 
     12 - Session Timer can always be listed in Supported header, but it's not necessarily always used (by omitting Session-Expires header), currently there is no mechanism to omit/turn-off Session-Expires header.