Network-Initiated IMS Registration via Special Message
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Solution Overview
Problem
There is no mechanism for network-initiated IMS registration of communication terminals without using a short message, leading to devices not being reachable via the IMS even when they have an IP or circuit-switched connection, and permanent network resource occupation during standard registration.
Innovation Solution
A method for network-initiated IMS registration using a special message transmitted via an existing communication connection, recognized by the terminal device to initiate an SIP registration, allowing registration without constant network resource occupation, using either a short message or an IP data packet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard IMS registration is performed after switching on, then the terminal can be reached via IMS, but network resources are permanently occupied
Solution Approach 1:
The patent implements periodic or on-demand IMS registration triggered by specific events (incoming calls, messages, or periodic timers) rather than continuous registration. The terminal device registers with the IMS network only when necessary, freeing network resources during idle periods while maintaining reachability when needed.
Solution Approach 2:
The registration state of the terminal is made dynamic rather than static. The terminal can transition between registered and unregistered states based on network conditions, user activity, and service requirements, allowing flexible resource management while maintaining service availability.
2Quantity of substance
If no IMS registration is performed, then network resources are not occupied, but the terminal cannot be reached via IMS
Solution Approach 1:
The system performs preliminary registration actions before they are strictly needed. The terminal proactively registers with the IMS network in advance of actual service requirements, ensuring immediate reachability when services are needed while allowing unregistration afterward to free resources.
Solution Approach 2:
The system uses feedback mechanisms where the network or terminal monitors service requirements and triggers registration accordingly. When the network detects an incoming call or message, or when the terminal detects service needs, it initiates registration to ensure reachability, then can deregister when no longer needed.
3Reliability
If IMS client registers by default after switching on, then the terminal is reachable via IMS, but this is not desirable when IMS services are rarely required
Solution Approach 1:
The terminal device autonomously manages its own IMS registration state based on local conditions and network signals. The device determines when registration is necessary and performs it independently, or responds to network-initiated registration requests, eliminating the need for default automatic registration and improving network resource efficiency.
Data Source
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AI summary
The invention relates to a method and a system for the network-initiated IMS registration of a telecommunication terminal. According to said method, the network transmits a message having specific characteristics to the terminal via an existing communication link, and the terminal recognizes said message as an IMS registration request based on the characteristics of the message and subsequently sends a registration message to the network to register with the IMS.