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USSD signaling from MSC to HLR

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kanai_panda
USSD signaling from MSC to HLR

Can any one tell me for USSD  signaling from MSC to HLR what is the SCCP call party adress ? 
Is it MGT which is derived from IMSI series analysis ?

Best Regards
kanai

Edited by: admin on 05/16/2010 - 04:32
Anil
Re: USSD signaling from MSC to HLR

Could you give more details about your question?

kanai_panda
Re: USSD signaling from MSC to HLR

Yes Anil,

              when subscriber dials USSD service code , then this goes to subscriber 's serving MSC and serving MSC find that  this is USSD service. MSC simply forward it to subscriber HLR. After HLR send it to USSD application. My question is that what is the GT adress used by MSC to forward this code to HLR.  is it MGT which is derived from IMSI series analysis ? or is it GT of HLR ?

Thanks and regards
kanai

Anil
Re: USSD signaling from MSC to HLR

It should be GT+SSN (=6 for HLR) combination such that the USSD reaches the home HLR.

kanai_panda
Re: USSD signaling from MSC to HLR

You mean this is GT of HLR not MGT derived from series analysis. Actually when USSD reaches to MSC, on that time MSC checks the IMSI  and further forwards to HLR. Are you sure about this ?

Tanks
kanai

pramod
Re: USSD signaling from MSC to HLR

Hi
I dont think it ll look into its IMSI series.Based on the MSISDN ,MSC look into its DB and by confirming he s our subscriber only then it routes to Home HLR through already configured GT+SSN ie on E164 format

If im wrong plz correct me

Anil
Re: USSD signaling from MSC to HLR

kanai_panda wrote:
You mean this is GT of HLR not MGT derived from series analysis. Actually when USSD reaches to MSC, on that time MSC checks the IMSI  and further forwards to HLR. Are you sure about this ?
Tanks
kanai

Yes, (MSISDN as GT/Called party) + SSN(=6) would route the message to home HLR.
I don't think it'll do IMSI analysis.