 request contains the URI identity of the IP-SM-GW entity. MESSAGE sip : ipsmgw homeB. net SIP/2. 0 10) The message SMS-DELIVER-REPORT/RP-ACK is carried by the SIP MESSAGE message between the P-CSCF and S-CSCF entities. 11) The message SMS-DELIVER-REPORT/RP-ACK is carried by the SIP MESSAGE message between the S-CSCF and IP-SM-GW entities. Short Message Service 12) The answer 202 Accepted acknowledges the SIP MESSAGE message received by the IP-SM-GW entity. 13), 14) The messages are identical to those exchanged for SMS over SGsAP with the IP-SM-GW entity playing the same role as the MSC server entity. Bibliography Chapter 1 - Network Architecture [3GPP TS 23.401] General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access [3GPP TS 23.228] IP Multimedia Subsystem (IMS); Stage 2 [3GPP TS 24.229] IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 [3GPP TS 29.212] Policy and Charging Control (PCC); Reference points Chapter 2 - Signaling Protocol [3GPP TS 24.301] Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS): Stage 3 [3GPP TS 36.331] Radio Resource Control (RRC): Protocol specification [3GPP TS 36.413] S1 Application Protocol (S1AP) [3GPP TS 36.423] X2 application protocol (X2AP) [3GPP TS 29.274] Evolved General Packet Radio Service (GPRS) Tunneling Protocol for Control plane (GTPv2-C); Stage 3 [IETF RFC 3261] SIP: Session Initiation Protocol [IETF RFC 4566] SDP: Session Description Protocol [IETF RFC 3428] Session Initiation Protocol (SIP) Extension for Instant Messaging VoLTE and ViLTE: Voice and Conversational Video Services over the 4G Mobile Network, First Edition. André Perez. C ISTE Ltd 2016. Published by ISTE Ltd and John Wiley & Sons, Inc. 290 VoLTE and ViLTE [IETF RFC 3262] Reliability of Provisional Responses in the Session Initiation Protocol (SIP) [IETF RFC 3515] The Session Initiation Protocol (SIP) Refer Method [IETF RFC 6665] SIP-Specific Event Not