7.1 Short Message forwarding
23.1423GPPInterface and signalling flowRelease 17TSValue-added Services for SMS (VAS4SMS)
The short message forwarding shall be a service feature only active for terminating user. The signaling procedure in originating side network shall not be affected for whether the message forwarding is active or not.
The figures in this clause describe the following possible scenarios when short message forwarding is active:
– a short message is forwarded to an address which is specified by terminating user other than called number.
– a short message is not forwarded subject to terminating user’s configuration
Figure 7.1-1 Terminating signaling flow – Short Message is forwarded
NOTE1: The content of the VAS4SMS message in operation 5 is the same as the original SMS, only the destination address shall be changed to forwarded-to number.
1-4. See general flow described in the previous clause 7.0. The VAS AS B checks that a terminating user has activated short message network forwarding service and indicates to the SMS Node B there is terminating VAS active.
5. According to user B’s preferences, the VAS AS B decides the message needs to be forwarded to MS C. The VAS AS B takes a loop check for original SM. If there is a loop prevention indication set in the SM, the VAS AS B shall not apply short message forwarding service and do not go to following steps.
6-10.The VAS AS B delivers the original short message to the MS C after including a loop prevention indication.
11. The VAS AS B generates a report of the short message and sends it to SMS Node B.
12. The SMS Node B notifies the originating side of the delivery status.
Figure 7.1-2 Terminating signaling flow – Short Message is not forwarded
NOTE2: The VAS4SMS message in operation 5 is the same as the original SM.
1-4. See general flow described in the previous clause 7.0. The VAS AS B checks that a terminating user has activated short message forwarding service and indicates to the SMS Node B there is terminating VAS active.
5. According to user B’s preferences, the VAS AS B decides the message needs not to be forwarded.
6-10.The VAS AS B delivers the original short message to the terminating user. See general flow described in the previous clause 7.0.
11. The VAS AS B generates a report of the short message and sends it to SMS Node B.
12. The SMS Node B notifies the originating side of the delivery status.