1. Diameter Signaling Router Mobile Number Portability User Guide
  2. vSTP IDP Relay and MOSMS
  3. MOSMS Overview
  4. MO-Based GSM SMS NP
  5. MO-Based GSM SMS NP Call Flows

MO-Based GSM SMS NP Call Flows

This section illustrates the sequence of messages that occur when a mobile operator delivers SMS messages in a number portability environment to:

  • A called subscriber that is in the same network as the calling subscriber
  • A called subscriber that is in a different network from the calling subscriber

Figure 5-9 MO-Based GSM SMS NP Call Flow for In-Network Subscriber

img/mo_based_gsm_sms_np.jpg

Call considerations:

  • The TCAP calling party is a wireless GSM subscriber.
  • The TCAP called party is a non-ported or ported-in wireless subscriber that belongs to the same carrier as the TCAP calling party.
  • The call type is SMS.
  • The SMSC (Short Message Service Center) has to remove the prefix that indicates that the DN (dialed number) is ported in.
  • If the called subscriber is ported-in, it must be provisioned individually.

Message Flow:

  1. MO_SMS(B) - vSTP intercepts SMS messages after they have undergone Prepaid Short Message Service Intercept (PPSMS) and Portability Check for Mobile Originated SMS (MNP SMS) processing and decodes the TCAP/MAP message destination address.
  2. MO_SMS(SP+B) - If successful, modify B-party Number and relay to SMSC.
  3. SRI_SM(B) - Send message to HLR to find B-party.
  4. SRI_SM - Send message to HLR to locate B-party.
  5. SRI_SM Ack - HLR sends message to vSTP.
  6. SRI_SM Ack - vSTP routes message to SMSC.
  7. MT_SMS - Deliver message to in-network subscriber.

Figure 5-10 MO-Based GSM SMS NP Call Flow for Other-Network Subscriber

img/mo_based_gsm_sms_np_other_network.jpg

Call considerations:

  • The TCAP called party is a non-ported or ported-in wireless subscriber that belongs to a different carrier from the TCAP calling party.
  • The call type is SMS.
  • The SMSC (Short Message Service Center) has to remove the prefix that indicates that the DN (dialed number) is ported in If the called subscriber is ported-out, it must be provisioned individually.
  • If the called subscriber is TDMA, the vSTP Migration feature ensures that the message gets delivered in the TDMA network.

Message Flow:

  1. MO_SMS(B) - vSTP intercepts SMS messages after they have undergone Prepaid Short Message Service Intercept (PPSMS) and Portability Check for Mobile Originated SMS (MNP SMS) processing and decodes the TCAP/MAP message destination address.
  2. MO_SMS(SP+B) - If successful, modify B-party Number and relay to SMSC.
  3. Deliver_SM - Forward message or submit message other network.