Dear all,

During the last rapporteur's meeting (Dublin - Ireland), it was expressed that defining H.22x (designed on the basis of H.225 annex G v2 at the current state - the backward compatibility with H.225 annex G v1 would be necessary) as a protocol used on BE--BE and BE--{Backend service entities} interfaces (other interfaces implying GKs could be considered) and stopping H.225 annex G would be a better way than defining a new protocol used on BE--{Backend service entities} interfaces and going on H.225 v2.

A significant argument is : in the latter case, the BE would support two application-layer protocols that may evolve separatly in the future. This would tend to make BE functionalities harder to implement. A second one is : if the H.22x "body" includes the H.225 annex G protocol , it can be used for information exchange on BE--BE interface even in the H.323 mobility management context.

To my understanding, H.22X would not contain any functional architecture description. This would be specifically described in every H.MMS.x draft, depending on the application context (H.323 specific, etc.). To give an example, the definition of generic entities would be contained in H.MMS.0. Specific entities such as GKs would be described in H.MMS.1. Then, mobility management implies a limited set of information exchanges that are independants from the application (although the type of exchange data depends on the application). These are related to the same actions at least : user registration/deregistration, location update, authentication, information update (e.g. user service profile transfer, update), location information request. So I think it is possible to define a "simple" generic protocol.

Best regards,

François Bougant France Telecom

-----Message d'origine----- De : Roy, Radhika R, ALASO [mailto:rrroy@att.com] Envoyé : mercredi 9 janvier 2002 16:16 À : BOUGANT François FTRD/DAC/ISS; ITU-SG16@echo.jf.INTEL.COM Cc : Meyer, Greg W Objet : RE: Report of Q.5 (mobility) phone conference, December 18th, 2001

Hi, Mr. Francois and All:

In addition, we also had some email correspondences among the conference participants and few interested folks including Mr. Jones and Mr. Reddy. It has been opined that H.22x is NOT needed because the extensions of the existing application-specific protocol (e.g., H.225.0 Annex G) for mobility will serve the purpose.

Copies of the emails are enclosed below.

Best regards,

Radhika R. Roy rrroy@att.com

PS: I would highly appreciate if Mr. Greg Meyer would send the email to the SG16 reflector as you know that I can receive the mail from the reflector, but cannot send it because of problems in filtering.