Re: VS: issue 6: scope of SA changes

Hi Mika,

> If we have this fine granularity and we do not want to move some 
> streaming data from WLAN to GPRS, what would happen to these
> SA's that are used to protect the streaming data during the handover? 
> If they stay as they were, does the streaming server send the data all 
> the time to this "lost connection", or do we some how delete the 
> "WLAN SA's" that are not moved to GPRS? 
> What happens to application level connection? Is it just going to die
> because there is no acknowledgements coming in?
>  
> Or should we move all SA's to GPRS and then let the application kill
> the unwanted stream? 

There's probably a few different cases. If we are talking about
mobility, then it seems that you have to move everything with
you to the new address in any case. (Unless you want to do
something like the zero address set for some of the SAs --
this might make sense if you have high-bandwidth traffic
that you don't want to come and fill you GPRS buffers.
But my head hurts if I try to think about this combination
of features...)

Another situation is multihoming. You could have stream 1
that you always keep in GPRS and stream 2 that you move
to the WLAN whenever its available. If you go out of
WLAN coverage, you don't kill stream 2, you just move
it back to GPRS.

--Jari