IMS Gateway Protocol Translation for Telephony Integration
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Solution Overview
Problem
Existing systems face challenges in seamlessly integrating telephony services with Internet Protocol (IP) multimedia subsystems (IMS) networks, particularly due to the need for proprietary protocols and complexities in managing mixed wireline and wireless technologies, which hinders the provision of advanced features like call hold and voicemail across diverse networks.
Innovation Solution
A gateway function acts as an application server, communicating with the IMS network through a session control unit, processing call interactions, and translating Computer Supported Telecommunications Applications (CSTA) protocol messages to Session Initiation Protocol (SIP) compliant messages for devices that do not support uaCSTA, enabling integration without proprietary interfaces and supporting advanced call control services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If proprietary protocols are used to integrate telephony services with IMS networks, then advanced services can be utilized, but device complexity and integration difficulty increase
Solution Approach 1:
The gateway serves as an intermediary component between the communication server and IMS network, translating between CSTA protocol messages and SIP protocol messages. This mediator approach allows telephony services to integrate with IMS networks without requiring direct proprietary protocol implementations, thereby reducing device complexity while maintaining service integration capability.
Solution Approach 2:
The patent replaces direct mechanical/protocol coupling between telephony systems and IMS networks with a message translation mechanism. Instead of requiring systems to physically integrate through proprietary interfaces, the gateway translates protocol messages, substituting complex direct integration with a simpler translation layer that maintains adaptability while reducing complexity.
2Adaptability or versatility
If protocol translation is implemented to support multiple devices, then compatibility improves, but processing overhead increases
Solution Approach 1:
The gateway is designed with universal functionality to handle multiple protocol translations simultaneously. By implementing a unified translation mechanism that can process CSTA to SIP translations for various devices through a single multi-functional component, the system achieves broad device compatibility without requiring separate translation components for each device type, thereby managing processing overhead efficiently.
3Adaptability or versatility
If advanced call control services are provided across diverse networks, then service capability improves, but system complexity increases
Solution Approach 1:
The system architecture is segmented into distinct functional components: the communication server handling telephony services, the gateway handling protocol translation, and the IMS network handling session control. This segmentation allows advanced call control services to be provided across diverse networks by distributing complexity across separate components rather than concentrating it in a single complex system, thereby maintaining service capability while managing overall system complexity.
Data Source
AI summary
An Internet protocol Multimedia Subsystem (IMS) gateway application server includes an originating application server module adapted to invoke call control services in response to requests initiated by a voice over Internet Protocol (IP) (VoIP) client associated with a communication device such as an IP telephone. Disclosed gateway application servers include a proxy server module adapted to notify the communication client of session control messages intended for the communication device.