RE: [MIP-QOS] Re: MIP-QOS -- Scope of discussions

[Hemant.Chaskar@nokia.com]

Jak,


I don't totally agree with your three "seperate" issues :

>> So I think there are three separate issues here:
>>
>> 1) How to get signalling that is handover friendly and provides Intsrv
>> like properties in the radio access network without requiring the
>> entire network to be Intsrv?


>It seems to me that the answer is micro mobility.

Just wondering, what does micro-mobility have to do with IntServ?


>> 2) How to match up the above with a DiffSrv like core, like Diff-edge?

>Same answer here. I would use Intserv in the micro mobility domain (to
>handle high mobility) and Diffserv in the core.

Can we claim that IntServ is optimized for high mobility scenarios? 

Would it suffice to say as a requirement that:

"QoS mechanism must interoperate with HETEROGENEOUS QoS domains that may be
encountered in the new end-to-end path."

That way we will not wander into territory of saying which QoS scheme to be
used in which part of the network.

> 3) How to do handover friendly, end to end QoS for those service
> providers that don't want to overprovision and want to provide
> the "all circuits" message?

>I'd say Micro mobility again !


>Finally, i'd like to point out that it seems to me one issue is not being
>discussed : a call which is initiated in a cell may have some bandwidth
>guarantee in a cell (domain ?). Howerver, when the mobile terminal roams,
it
>may move into an area which cannot offer the same bandwidth to the
>terminal(because the bandwidth has been allocated to users with the same
>priority level). There are 2 issues :
>	- degrade the QoS for the user or connect through another path if
this >path
>exists (which has been mentioned)
>	- make sure that this does not happen to often (maybe by
distinguishing
>handoffs and new calls as it is done in most cellular systems)

I think the above issue is outside the scope of solution for which we are
formulating the requirements. The above issue is a special case of service
discovery problem at large. We will still assume that target AR is known and
hand over to it. Whether target AR wants to reserve bandwidth for handover
calls or wants to handover connection to yet another AR is not within the
scope of our problem statement.

Gwendal