RE: Transfer of N-STATE_request in SUA

Stanislav,

-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of
Stanislav Ivanovich
Sent: Thursday, January 05, 2006 12:14 PM
To: SIGTRAN
Subject: RE: [Sigtran] Transfer of N-STATE_request in SUA


Tolga, Brian,

Brian I read all the sections in the SUA and the reason why I am asking this
question is that Tolga's answer below is the only way how a user is supposed
to generate N-STATE_request for a particular SCCP subsystem.

However I consider this fault in SUA specification for the following
reasons:

1) there are no conceptual problems of having DUNA message containing
N_STATE-request sent from ASP to SGP within a particular AS for the same
reason why it is not problem of having N-STATE_request sent from SCCP-user
to SCCP.

2) Using ASP TM messages for this management is very problematic since it
actually says that it is not possible to independently manage several SCCP
subsystems that are part of the same AS. It forces implementors to support
multiple AS'es per signaling process just to have separate SCCP subsystems
separately manageable!!
[TOLGA]OTOH, one could argue that AS is an entity which becomes
available/unavailable as a whole, i.e. if it has multiple subsystems, they
should be in-service/out-of-service simultaneously. So, what you consider as
problematic is IMO a direct consequence of the AS concept.

If you think otherwise why do you forbid sending DUNA from ASP to SGP which
is to carry N-STATE_request fro independent SCCP subsystems that are part of
the same AS? What is the problem of having this?

regards/ Stanislav Ivanovich



Tolga Asveren <[email protected]> wrote:
Stanislav,

The answer to your question is "No". The behavior you are mentioning is
controlled with ASPAC/ASPIA, i.e. with AS state.

Thanks,
Tolga


-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of
Stanislav Ivanovich
Sent: Thursday, January 05, 2006 11:46 AM
To: SIGTRAN
Subject: Re: [Sigtran] Transfer of N-STATE_request in SUA


Brian,

You didn't understand my question.! You refer to section 4.5.1. which is
related to handling of SSNM messages at SGP. I asked about N_STATE_request
(not N_STATE_indication) which is supposed to be sent from SCCP-user at ASP
to SCCP at SGP.

I would appreciate answer to my questions with YES or NO.

regards/ Stanislav Ivanovich


"Brian F. G. Bidulock" wrote:
Stanislav,

Read sections 4.5.1 and all of 3.4 of RFC 3868. Grep on N-STATE.

--brian

Stanislav Ivanovich wrote: (Thu, 05 Jan 2006 07:59:27)
>
> Hello SIGTRAN community,
>
>
>
> In standard SCCP there is a primitive called N-STATE_request which
> transfers management information (in-service/out-of-service) from
> SCCP-user to SCCP.
>
>
>
> How is this information conveyed between SGP and ASP?
>
> Is ASP allowed to send DUNA message to SGP by containing SSN (thus
> having DUNA corresponding to N-STA! TE primitive)?
>
>
>
> regards/ Stanislav Ivanovich
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--
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/





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