Z.2 Architecture

23.2283GPPIP Multimedia Subsystem (IMS)Release 18Stage 2TS

Support for RLOS requires additional functionalities in the P-CSCF, I- CSCF, and S-CSCF as will be depicted below. The additional functionality can be built on the existing functionality to support RLOS and non-RLOS IMS services. Optionally, dedicated IMS nodes (P/I/S-CSCFs) supporting only RLOS can be deployed.

NOTE: Architecture for roaming scenarios without IMS-level roaming agreement (as defined in Annex W) does not apply to RLOS users accessing IMS.