Due to historical reasons, interworking between IMS networks of different operators is still carried out through circuit gateway offices, which is not only inefficient, but also has poor user experience. With the popularization of 5G applications, operators' IMS networks have further expanded, and circuit-based interworking can no longer meet the needs of new services.
The operator's IMS network adds IBCF and TrGW functional modules to realize direct IP interworking. IBCF implements signaling interoperability, topology hiding and IP security protection capabilities for voice, video, and multimedia services. TrGW implements media interoperability, topology hiding and IP security protection capabilities for voice, video, and multimedia services, and supports voice codec format conversion.
Providing cross-network services
Realizing all-IP applications
Improving user experience