Convergence Gateway for Legacy CS to IMS Service Adaptation
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Solution Overview
Problem
Telecommunication Service Providers face challenges in providing voice service parity to IMS core network subscribers due to the difficulty in migrating legacy circuit-switched services to SIP-based application servers, resulting in limited availability of legacy service features in IMS core networks.
Innovation Solution
A convergence gateway is deployed in the IMS core network to interface between the IMS and legacy CS networks, adapting legacy circuit-switched services and extending IMS core network services to legacy subscribers, enabling seamless communication across both domains using appropriate signaling protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If legacy circuit-switched services are migrated to SIP-based application servers, then service modernization is achieved, but migration difficulty and complexity increase
Solution Approach 1:
The patent introduces an Intelligent Network gateway as an intermediary component that bridges the legacy Intelligent Network and the IMS domain. This gateway translates and adapts CAMEL service logic to SIP-based application servers, enabling service modernization without direct migration of legacy services. The gateway acts as a mediator that handles protocol conversion and service logic translation, reducing migration complexity while achieving service modernization.
2Adaptability or versatility
If IM-SSF is used to provide legacy services to IMS subscribers, then service compatibility is improved, but service feature availability is limited
Solution Approach 1:
The patent introduces an Intelligent Network gateway as an intermediary component that bridges the legacy Intelligent Network and the IMS domain. This gateway translates and adapts CAMEL service logic to SIP-based application servers, enabling service modernization without direct migration of legacy services. The gateway acts as a mediator that handles protocol conversion and service logic translation, reducing migration complexity while achieving service modernization.
3Adaptability or versatility
If signaling protocol mapping is implemented between SIP and CAMEL, then interoperability is achieved, but implementation complexity increases
Solution Approach 1:
The patent introduces an Intelligent Network gateway as an intermediary component that bridges the legacy Intelligent Network and the IMS domain. This gateway translates and adapts CAMEL service logic to SIP-based application servers, enabling service modernization without direct migration of legacy services. The gateway acts as a mediator that handles protocol conversion and service logic translation, reducing migration complexity while achieving service modernization.
Solution Approach 2:
The Intelligent Network gateway is designed with multi-functional capabilities to handle various CAMEL service logic types (Basic Service Logic, Enhanced Service Logic, Service Execution Logic) and translate them to SIP-based implementations. This universal design allows the gateway to support multiple legacy services through a single platform, reducing overall implementation complexity compared to separate mapping solutions for each service type.
Data Source
AI summary
Systems and methods for service execution across legacy telecommunications networks and Internet Protocol Multimedia Subsystem (IMS) domains are described. In one aspect, a convergence gateway is deployed in an IMS network to interface between the IMS network and a legacy circuit-switched (CS) telephony network (legacy network). The convergence server extends legacy network-supported circuit-switched services (including voice supplementary services, enhanced voice services, and messaging) to IMS core network subscribers. To this end, the systems and methods rely on the legacy network to implement supported circuit-switched services and generate corresponding results. The corresponding results are adapted to a signaling protocol and state model for the IMS network and provided to one or more IMS subscribers.