message MAP FORWARD SHORT MESSAGE between the SMS-GMSC and MSC server entities. 5) The message SGsAP PAGING containing the temporary mobile subscriber identity (TMSI) of the mobile, is transmitted to the MME entity. 6) The message S1-AP PAGING, containing the identity shortened TMSI (S-TMSI) is sent to all eNB entities of the TAI area. VoLTE and ViLTE Server SMS / SMS-DELIVER SEND ROUTING INFO FOR SM SEND ROUTING INFO FOR SM ACK SMS / SMS-DELIVER / RP-DATA MAP FORWARD SHORT MESSAGE SGsAP PAGING S1-AP PAGING Paging Service Request SGsAP SERVICE REQUEST SMS / SMS-DELIVER / RP-DATA / CP-DATA SGsAP DOWNLINK UNITDATA SMS / SMS-DELIVER / RP-DATA/CP-DATA NAS DOWNLINK NAS TRANSPORT CP-ACK NAS UPLINK NAS TRANSPORT CP-ACK SGsAP UPLINK UNITDATA SMS-DELIVER-REPORT / RP-ACK / CP-DATA NAS UPLINK NAS TRANSPORT SMS-DELIVER-REPORT / RP-ACK / CP-DATA SGsAP UPLINK UNITDATA SMS-DELIVER-REPORT / RP-ACK MAP FORWARD SHORT MESSAGE ACK SMS-DELIVER-REPORT CP-ACK SGsAP DOWNLINK UNITDATA CP-ACK NAS DOWNLINK NAS TRANSPORT SGsAP RELEASE REQUEST Figure 10.5. Procedure at terminating side for SMS over SGsAP 7) The RRC Paging message is broadcast by the eNB entities belonging to the TAI area. The mobile connects to the eNB entity and performs a service request to the MME entity to establish the signaling bearer. Short Message Service 8) The MME entity sends a service request to the MSC server entity, via the message SGsAP SERVICE REQUEST. 9) The message SMS/SMS-DELIVER/RP-DATA/CP-DATA conveyed by the message SGsAP DOWNLINK UNITDATA between the MSC server and MME entities. 10) The message SMS/SMS-DELIVER/RP-DATA/CP-DATA transported by the message NAS DOWNLINK NAS TRANSPORT between the MME and the mobile. The CP-ACK message is transmitted from the mobile to acknowledge the message SMS/SMS-DELIVER/RP-DATA/CP-DATA. 11) The CP-ACK message is conveyed by the message NAS UPLINK NAS TRANSPORT between the mobile and the MME entity. 12) The CP-ACK message is conveyed by the message SGsAP UPLINK UNITDATA between the MME and MSC server entities. The message