RE: Recommendation for SUA modifications

Brian,

As far as I can see, SCTP congestion may not be good enough for cases:
a)Where there are I/O bound operations on ASP as part of application
logic -depending on latency on I/O operation, application can declare itself
congested, rather than waiting SCTP to detect it-
b)If ASP-M3UA and ASP-Service Logic are on different hosts/cards/blades
etc..

For both of those cases, congestion will probably propogate down to the SCTP
level eventually, but it can be detected and SG can take proper action
earlier. Actually I believe even for the generic case, application can
detect congestion earlier than SCTP for most of the situations and I think
to have the option to communicate this as early as possible is a nice thing
to have.

    Thanks,
    Tolga

> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Brian F. G. Bidulock
> Sent: Friday, October 14, 2005 10:46 AM
> To: Tolga Asveren
> Cc: [email protected]; [email protected]; [email protected]
> Subject: Re: [Sigtran] Recommendation for SUA modifications
>
>
> Tolga,
>
> What were the scenarios where SCTP flow control (arwnd) do not work?
>
> Could you detail them?
>
> I would like to capture them in my congestion draft.
>
> --brian
>
> Tolga Asveren wrote:                            (Fri, 14 Oct 2005
> 09:34:42)
> > Brian,
> >
> > On the big picture I agree with you that SSNM is meant to be
> used for SS7
> > network management, hence SCON is supposed to be used for SS7 congestion
> > procedures. OTOH, there is a need to notify congestion status
> of ASPs to SG
> > and right now it seems like we don't have a solution -actually
> till now the
> > supposed solution was relying on SCTP congestion but there are scenarios
> > where this is not enough/does not work well-. I believe
> something needs to
> > be done to address that issue.
> > a)Either a new ASPTM
> > b) or overloading SCON
> >
> >     Thanks,
> >     Tolga
> >
>
> --
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>
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