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Wireless Short Message Service (SMS)
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PDF of this tutorial5. Mobile-Terminated Short Message Example
Figure 3 depicts the successful MT—SM scenario for GSM.
Figure 3. MT—SM Scenario (GSM)
- The short message is submitted from the ESME to the SMSC.
- After completing its internal processing, the SMSC interrogates the HLR and receives the routing information for the mobile subscriber.
- The SMSC sends the short message to the MSC using the forward short message operation.
- The MSC retrieves the subscriber information from the VLR. This operation may include an authentication procedure.
- The MSC transfers the short message to the MS.
- The MSC returns to the SMSC the outcome of the forwardShortMessage operation.
- If requested by the ESME, the SMSC returns a status report indicating delivery of the short message.
Figure 4. MT Short Message Scenario (IS—41)
- The short message is submitted from the ESME to the SMSC.
- The SMSC sends an acknowledgement to the ESME, indicating reception of the short message.
- After completing its internal processing, the SMSC interrogates the HLR.
- The HLR sends the routing information for the mobile subscriber to the SMSC.
- The SMSC sends the short message to the MSC using the SMSDPP Invoke operation.
- The MSC transfers the short message to the MS.
- The MS returns an acknowledgement to the MSC.
- The MSC returns to the SMSC the outcome of the SMSDPP operation.
- If requested by the ESME, the SMSC returns a delivery receipt indicating successful delivery of the short message.
