7.7 Short Message Virtual Private Network (VPN)

23.1423GPPInterface and signalling flowRelease 17TSValue-added Services for SMS (VAS4SMS)

The originating user and the terminating user are in the same VPN and support sending messages to local numbers in the VPN. The local number may be a short number which is bound to mobile number. The mapping table with local number to mobile number shall be stored in the VAS AS. The VAS AS receiving a checking message from SMS Node checks that the originating user activating VPN service, then replace local number by terminating user’s mobile number.

Figure 7.7-1 Short Message Virtual Private Network procedure

1. The SMS Node A receives a short message to local number from MS and need ask the VAS AS to check whether the originating user has activated VAS.

2.-3. The VAS AS checks that the originating user has activated VPN service and the destination is a local number. The VAS AS indicates the SMS Node there is active originating VAS for originating user.

4. The VAS AS replaces the local number by its mobile number and continues according to the general procedure described in clause 7.0 step 4 and following.