SIP Application Server IMS Registration Mediator
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Solution Overview
Problem
Current IP Multimedia Subsystem (IMS) architecture restricts Application Servers from registering or deregistering users or contact addresses, limiting their ability to offer services to users not already registered with the IMS, especially when accessing via non-SIP based networks.
Innovation Solution
A method and system allowing Session Initiation Protocol Application Servers to perform registration and deregistration on behalf of users through the Service Control Interface, Gm interface, or Ma interface with Call State Control Functions, enabling them to act as SIP User Agents and manage user profiles and capabilities within the IMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Application Servers are restricted from registering users in the IMS, then the IMS architecture maintains security and control through centralized registration, but Application Servers cannot provide services to unregistered users or access via non-SIP networks
Solution Approach 1:
The patent introduces a registration manager component that acts as an intermediary between Application Servers and the IMS registration system. This mediator enables Application Servers to register unregistered users on their behalf without compromising the centralized security model, thereby providing service access flexibility while maintaining architectural control.
Solution Approach 2:
The patent enables Application Servers to perform self-registration and user registration operations directly through the IMS interfaces. By allowing Application Servers to autonomously manage their own registration state and contact addresses, the system reduces the need for complex centralized management while maintaining security through standardized SIP procedures.
2Adaptability or versatility
If users must be registered before accessing IMS services, then the IMS can authenticate and allocate S-CSCFs properly, but users accessing via non-SIP networks cannot utilize IMS services
Solution Approach 1:
The patent implements preliminary registration actions where Application Servers can pre-register contact addresses and user profiles in the IMS before actual service access. This allows users from non-SIP networks to be recognized and authenticated when they access services, as their registration state is already established in advance through the Application Server.
Solution Approach 2:
The Application Server acts as an intermediary that bridges non-SIP networks and the SIP-based IMS. It performs registration on behalf of users from non-SIP networks, translating their access requests into standardized SIP registration procedures, thereby enabling network access flexibility while maintaining authentication reliability through the IMS security framework.
3Productivity
If Application Servers can register multiple contact addresses, then service delivery to multiple users and devices is enhanced, but the complexity of managing user profiles and contact addresses increases
Solution Approach 1:
The patent implements a universal registration mechanism where a single Application Server can register multiple contact addresses and serve multiple users through a unified interface. This multi-functional capability allows one Application Server to manage diverse contact addresses (different users, devices, access points) without requiring separate registration systems, thereby improving service delivery efficiency while standardizing profile management.
Solution Approach 2:
The patent merges multiple contact address registrations and user profile management operations into a single unified registration process. By combining multiple registration functions into one standardized procedure, the system enhances productivity through streamlined service delivery while reducing the apparent complexity through consolidation of management operations.
Data Source
AI summary
A method of registering or deregistering a user to or from an IP Multimedia Subsystem (IMS) network. A SIP Application Server (SIP-AS) performs a registration or deregistration with the IMS network on a user's behalf. The registration or deregistration is performed over one of the following interfaces: a Service Control Interface (ISC) with a Serving Call State Control Function (S-CSCF), a Gm interface with a Proxy CSCF (P-CSCF), or an Ma interface with an Interrogating CSCF (I-CSCF).