A quotation from draft-ietf-rohc-sigcomp-sip-01.txt section 3:
"When SigComp is applied to SIP, there is a one-to-one relationship between a SIP dialog (see section 12 of [RFC-3261]) and a pair of peer SigComp compartments....
The only requirement is to maintain a local one-to-one mapping between a dialog ID and a compartment ID."
This kind of limitation might cause inefficiency. For exmaple, in case of UAC, which is configured to send all its' requests to an outbound proxy. Instead of using single compartment, that stores common data (all the outgoing requests share the same destination), each established dialog will trigger new compartment. It seems to be wasteful.
Generally, there might be several dialogs that share common data and had better if they would also share the same compartment, isn't it?
Thanks in advance, John.
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