Service Level Interworking (SLI) for messaging services
The present document specifies the protocol details of service level interworking between Instant Message (OMA-TS-SIMPLE_IM [4]) or Chat Session (OMA-TS-CPM_Conv_Fnct [17]) using the 3GPP IP Multimedia CN subsystem and the Short Message Service over both legacy CS/PS network as specified in the 3GPP TS 23.040 [2] and a generic IP Conectivity Access Network (IP-CAN) as specified in the 3GPP TS 24.341 [5]. These include:
- Procedures to implement service level interworking between IM and SM;
- Procedures to implement service level interworking between CPM and SM;
- Enhancement of the IP-SM-GW as an Application Server to support service selection, authorization and mapping between IM or CPM and SM protocols; and
- Interaction between service level interworking and transport layer interworking.