[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Sipping] Internet draft on missed calls / msgs notification

Arjun,

Arjun Roychowdhury wrote: 
The intent of the draft is well placed and useful. However, I wonder
if this draft makes an assumption that the network service is only
provided by one entity.

I think it makes the assumption that the subscription terminates on one entity that can provide the requested information. How that entity gets the information is another story. There is a little bit of text that hints at a mechanism. I couldn't get much out of it - it might be overly restrictive. In any case, I think the mechanism for gathering the information can be independent of the mechanism for retrieving it.

The concept of service execution in SIP was that multiple nodes could
be participatory. In the case of a 'missed call' a proxy may be just a
default forwarding device to an AS that really decides if the call is
missed. Similarly, depending on other factors, the AS itself may be
'handing off' a call to another node, say a B2B. The AS thinks that
the call is actually connected whereas the B2B knows it is not.

The question therefore arises as to who really knows that the call is
really missed and who reports. More importantly, if the notion of the
service result is shared between multiple nodes, no one node could
really report effectively.

Therefore, is the concept of 'call history' more applicable here as a
primitive that needs be specified and missed call a construct on top
of it ? I

I agree that more work is needed, on a sort of framework, to determine how this information can be determined.

If we just view this as a "call log", that contains what information is known about calls, then we can perhaps dodge fully defining what constitutes a "missed" call. (IMO there is no single definition that everyone would agree on.) The log would just capture what information is available to it, and watchers can develop their own criteria for what constitutes "missed", if that is what they want to know.

	Paul

On 9/23/05, Avasarala Ranjit-A20990 <ranjit at motorola.com> wrote:


Hi
   I want to propose an internet draft on notification for missed calls/
messages thru XML event package. Plz go thru it and give your comments.

Thanks
<<draft-ranjit-missed-calls-msgs-00.txt>>

Regards
Ranjit



_______________________________________________
Sipping mailing list
https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use sip-implementors at cs.columbia.edu for questions on
current sip
Use sip at ietf.org for new developments of core SIP






--
Arjun Roychowdhury

_______________________________________________
Sipping mailing list  https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sip at ietf.org for new developments of core SIP


_______________________________________________
Sipping mailing list  https://www1.ietf.org/mailman/listinfo/sipping
This list is for NEW development of the application of SIP
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sip at ietf.org for new developments of core SIP