Cell Relay Archive

[albert.e.manfredi@boeing.com]

In article <199802242013.MAA15419@thranduil.trillium.com.trillium.com>,
  rajeev@trillium.com (Rajeev Gupta) wrote:

[ ... ]

> In addition to the wireless aspects, WATM also has to deal with mobility
> management in the network (this is sometimes referred to as mobile
> ATM, MATM). There are two major aspects of mobility management:
>
> - location management: when a call is to be placed to a mobile terminal,
>   its current location must be determined by the network.
>
> - handover: when a mobile terminal moves while maintaining connections,
>   the connections need to be rerouted in the network in order to
>   maintain connectivity.
>
> These functions require support in the network in the form of storage
> functions (e.g. location registers) and control functions (e.g. signalling
> for handover). This work is being done in the WATM group of the
> ATM Forum. Most likely the work will result in specifying enhancements
> to existing protocols (e.g. UNI, PNNI, BICI) to support mobility.

Rajeev,

This is most interesting to me at the moment. Also, this difficult problem,
as far as I can tell, is identical to that faced by mobile IP. Do you have
a brief description of the general approach taken by the ATM forum that you
could share on here?

The solutions available today seem to be very compromised. What I think the
ultimate solution would be is something like a real-time OSPF (hence similar
to PNNI), but hopefully without bringing down the whole structure with its
own signaling overhead.

I'd be curious how they are approaching this. Thanks.

Bert
manfredi@arl.bna.boeing.com

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