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SMSC on CDMA network with ANSI and ITU

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usersphinx
SMSC on CDMA network with ANSI and ITU

Hi all,

I'm trying to understand how to handle both ANSI and ITU SMS in a CDMA network?

I'm developing an SMSC for CDMA network and I'm very new the ANSI world, the operator is asking my us to provide them an SMSC that handle both ANSI and ITU standards at the same time. So the message can be revived on ANSI and should be delivered to ITU-GSM network.

I'm not sure if that should be done by provisional MSISDN ranges or NDC or something like that or maybe it shouldn't be handled by the SMSC at all.

I hope you guys can help with your experience.

afink
afink's picture
RE: SMSC on CDMA network with ANSI and ITU

In the ITU GSM world you use the following protocol stack

ITU-MTP2
ITU-MTP3
ITU-SCCP
ITU-TCAP
GSM-MAP
SMS Layer

If you use GSM in the USA, you have this

In the ITU GSM world you use the following protocol stack

ANSI-MTP2
ANSI-MTP3
ANSI-SCCP
(ITU-SCCP as conversion)
ITU-TCAP
GSM-MAP
SMS Layer

If you talk about old CDMA networks you have this

ANSI-MTP2
ANSI-MTP3
ANSI-SCCP
ANSI-TCAP
IS41-MAP
IS41-SMS Layer

If we talk about 3G and newer stuff, then GSM-MAP is used again.
Basically you will only find IS41 in older networks.

We did a convertor to look like GSM to put in front to receive so CDMA networks can look like GSM. This was by simulating a HLR and MSC for the SMS side. Then we filed the message to SMPP to the CDMA SMSC.

One difference. in IS41 you have the possibility to transfer a message from SMSC to SMSC. In GSM there is no such thing. You can only terminate it directly to the phone (or a intermediate system which looks like it delivered it to the phone)

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SS7 , Internet & Networking Expert.
Developed own SS7/Sigtran/GSM protocol stack