Re: [MEXT] the future of the MEXT working group

Hi,

I think that the point is to give a choice to the network and user if
mobility is needed or not. Some applications benefit from seamless
mobility (e.g., VoIP), but others may not (e.g., Web access). The
network and user should be able to specify the capability of mobility
and appropriate access network for each application. In that sense,
Dynamic MM is an interesting feature.

I agree that the current 3GPP architecture is very complicated and may
not be optimal, but I don't think it is a good idea to change it in IETF...

Regards,
-- 
Hidetoshi

(2011/11/05 12:15), Pete McCann wrote:
> On Fri, Nov 4, 2011 at 2:06 PM,<[email protected]>  wrote:
>>
>> Applications are evolving such that they can handle change in access network
>> connectivity. A small set of applications currently need the type of seamless
>> mobility and handovers that Mobile IP provides. But that advantage and benefit
>> is waning IMHO.
> 
> The same argument could be applied to the GPRS architecture.  Gluing
> additional access technologies to the P-GW with GTP tunnels is completely
> unnecessary.
> 
>> I dont disagree with your points above and I guess having a document which
>> illustrates how a Mobile IP based approach can dramatically simplify the interfaces
>> and complexity would be useful. But then again maybe the requirements are such
>> that any attempt to meet those with Mobile IP and IETF protocols would result in
>> an equivalently complex system. I don't know.. But thats a possibility.
> 
> We should definitely not try to replicate GPRS with Mobile IP.  I think the
> point of this discussion is that some of the requirements (like IP address
> continuity throughout all space and time) that drove the existing architecture
> need to be relaxed.
> 
>> You could also view a future where the complexity of the architecture is
>> overwhelming enough to cause its own demise.
> 
> I think we may be close to that point already.
> 
> -Pete
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