Hi Pierrick, Catching up on DMM threads, have been sleeping for a while, some comments woke me up :)
I agree with you. IMO, to achieve DMM we need: 1.) Localized Gateway Selection. The ability for the network to assign a anchor point closer to the UE location. Ex: Geo-location, RNC ID ... Most already got in Rel-10. 2.) Once the session is created and the UE moves to a new location. There should be a new gateway assignment. The network should continue to advertise both the prefixes, but the advertised prefixes should have the proper color to distinguish between those prefixes. 3.) Network should set up tunneling for the old prefixes, to the prev anchor. It should deprecate the older prefixes. 4.) UE should use enhanced SAS schemes to use the new prefix for the new flows. 5.) Over time, once the old flow die, the tunnel to the prev home is gone and the UE has optimized traffic flows. This introduces simple changes into the mobility architecture and most semantics are already there in one form, or the other. The missing aspect is the type of Address and how we enable the UE to leverage that aspect and make Source Address selection and also for the network to manage those prefixes in a proper way. To that affect, I agree this is one important requirement. -- Regards Sri On 3/19/12 3:16 AM, "[email protected]" <[email protected]> wrote: > I think it is worth to work on solution providing more information on the type > of address. IMHO, it is a requirement for the UE to play with more than one IP > address and select the more appropriate source address according the > topological anchor point. DMM is clearly one use-case but, this feature is > also required for offload purpose in current centralized network based > mobility. The ongoing proposals for RA extensions, that allow to distinguish > anchored from local prefix, are interesting. Now, the UE shall have the > intelligence to make the source address selection according to prefix > properties; at least extensions to RFC3484 may be defined but more > sophisticated selection behavior may be required, typically, policies based > selection, e.g. offload policies. > > Pierrick _______________________________________________ dmm mailing list [email protected] https://www.ietf.org/mailman/listinfo/dmm
