Cullen Jennings wrote:
I'd like it if the requirements state that the solution be able to
support a "make before break" style of handover even if it possible
to use the solution to also do "break before make".
Cullen <in my individual contributor role>
Dear Cullen (and all interested people),
we are revising the draft-niccolini-sipping-siphandover to take into
account the different comments and I am now tackling your comment.
We can simply take the comment literally, adding it in section 4:
The solution should support a "make before break" even if it is possible
to use the solution to also do "break before make"
But if we dig a little bit into this problem... we can ask what is meant
by "support": is it just "allow" or is it "exploit" ?
Therefore a second option is to include a mandatory requirement and an
optional one:
Mandatory req:
The solution should *allow* a "make before break" even if it is possible
to use the solution to also do "break before make"
Optional req:
Using "make before break" should minimize packet loss. The solution
should also try to take care of the packet reordering due to the
vertical handover.
In this respect we had some discussion among contributors to the draft,
salvatore loreto wrote:
how minimize the packet loss (or avoid it at all) and the re ordering
problem during a Vertical Handover! The question is there any
protocol solution that can avoid it, or it is an hacking question?
I'd like to have some discussion and comments on this point: do we take
care of requirements that relate to how the packets are handled in order
to minimize loss and packet reordering ?
Cheers,
Stefano
--
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Stefano Salsano
Dipartimento Ingegneria Elettronica
Universita' di Roma "Tor Vergata"
Via del Politecnico, 1 - 00133 Roma - ITALY
http://netgroup.uniroma2.it/Stefano_Salsano/
E-mail : stefano.salsano@xxxxxxxxxxx
Cell. : +39 320 4307310
Office : (Tel.) +39 06 72597770 (Fax.) +39 06 72597435
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