Re: [Dime] one doubt about sip application

[Miguel Garcia <Miguel.An.Garcia at nokia.com>]

Tony:

The intention of the SIP-Accounting-Information is to outsource Diameter
accounting to a different server, not to a different realm. So, from
that point of view, the idea is to keep the realm constant, but not the
server. I am not sure of any use case where you need to switch realms
within the same application (SIP services), but different hosts
(authorization/authentication vs. accounting).

Additionally, if the Diameter client gets only the realm where to
provide accounting, as you propose, then you need to have a mechanism to
guarantee that you can discover the host out of the realm. So, if this
mechanism is not in place, or the Realm Routing Table is not properly
provisioned, you run into trouble.

Thus, I wouldn't recommend to provide realms for the accounting part of
the Diameter SIP application.

BR,

         Miguel


Tony Zhang wrote:
> Hi All:
>    In Sip Application SIP-Accounting_Information is like below:
>          SIP-Accounting-Information ::= < AVP Header: xx01 >
>                                    * [ SIP-Accounting-Server-URI ]
>                                    * [ SIP-Credit-Control-Server-URI ]
>                                    * [ AVP]
>  
>    Actual in Rfc3588 accounting request define is like below:
>       <ACR> ::= < Diameter Header: 271, REQ, PXY >
>                 < Session-Id >
>                 { Origin-Host }
>                 { Origin-Realm }
>                 { Destination-Realm }
>                 { Accounting-Record-Type }
>                 { Accounting-Record-Number }
>                 [ Acct-Application-Id ]
>                 [ Vendor-Specific-Application-Id ]
>                 [ User-Name ]
>                 [ Accounting-Sub-Session-Id ]
>                 [ Acct-Session-Id ]
>                 [ Acct-Multi-Session-Id ]
>                 [ Acct-Interim-Interval ]
>                 [ Accounting-Realtime-Required ]
>                 [ Origin-State-Id ]
>                 [ Event-Timestamp ]
>               * [ Proxy-Info ]
>               * [ Route-Record ]
>               * [ AVP ]
>  
> this is means,Account Request recommend use Realm not Host.
>  
> so if define SIP-Accounting_Information  like below is better or not?
>          SIP-Accounting-Information ::= < AVP Header: xx01 >
>                                     [ SIP-Accounting-Server-Realm ]
>                                     [ SIP-Credit-Control-Server-Ream ]
>                                    * [ AVP]
> we send account request to account server,then we can Fill 
> SIP-Accounting-Server-Realm  Into Destination-Realm of Account Request.
>  
> if not like this,we should fill SIP-Accounting-Server-URI into 
> Destination-Host,the other question is how to contruct 
> Destination-Realm(this avp is mandatory)?
>  
> Thanks!
> Tony Zhang
> 
> 
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-- 
Miguel A. Garcia           tel:+358-50-4804586
sip:miguel.an.garcia at openlaboratory.net
Nokia Research Center      Helsinki, Finland


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