Hi all,
I've recently heard (unofficially) that some claim Annex G (APC-1546/TD-20 in Monterey) also to support roaming of users between different domains.
If this is true, I wonder how.
I can see how the AccessRequest/ValidationRequest might be sent from a visiting domain to the home domain for per-call authorization. While this might work in simple cases, it will hinder the use of services while roaming. I can not either see any mechanism to authorize the roaming registration.
I am sorry to post based on "rumors", but this may change the scope of Annex G significally, and I worry if this might affect future work on roaming. As Tiphon has just started their work on roaming by analysing existing roaming techniques in telco and datacom/IETF work,and not yet reached any conclusion, it seems premature to use annex G in its current state for roaming.
Espen