IMS Group Subscription Management via Implicit Registration Sets
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Solution Overview
Problem
Current IP Multimedia Subsystem (IMS) technologies face challenges in efficiently managing group access to IMS services, particularly for users without individual subscriptions, leading to inefficiencies and increased message transit times when handling large groups or non-IMS network terminals.
Innovation Solution
Incorporating functioning instructions into IMS subscriptions to adapt node behavior for specific user groups, allowing flexible handling of various access points and terminals, including IP-PBXs and SIP proxies, through wildcard Public Service Identities and Implicit Registration Sets, which enable flexible service profiles and message handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If individual IMS subscriptions are required for each user terminal, then service control and charging can be implemented, but device complexity and registration overhead increase significantly for large groups
Solution Approach 1:
The patent merges multiple individual user identities into a single group subscription. The group subscription acts as a container that holds multiple user identities (public service identities) and their associated service profiles. This allows multiple users to be managed under one subscription entity, reducing the number of separate registration operations needed while maintaining individual service control capabilities.
Solution Approach 2:
The group subscription serves multiple functions simultaneously: it acts as a registration entity, a service profile container, and a charging entity. The implicit registration set mechanism allows a single registration to cover multiple user identities, providing universal access control for group members without requiring individual registration procedures for each user.
2Ease of operation
If standard IMS registration procedures are used for group access, then individual user control is maintained, but message transit time increases for large groups
Solution Approach 1:
The patent performs preliminary configuration of the implicit registration set and associated service profiles during group subscription creation. This pre-configuration stores the relationships between group identity and member identities in advance, so that during actual message routing, the network can quickly resolve group addresses to individual member addresses without time-consuming lookup procedures.
Solution Approach 2:
The group subscription acts as an intermediary entity between the network and multiple end users. It mediates the registration and service delivery process by maintaining the implicit registration set that maps group identity to individual member identities, enabling efficient batch operations while preserving individual user control through stored service profiles.
3Adaptability or versatility
If wildcard Public Service Identities are used for group access, then flexible service profiles can be defined, but measurement precision of user identification decreases
Solution Approach 1:
The patent applies local quality by associating specific service profiles with individual user identities within the implicit registration set. While the group level uses wildcard identities for flexible service definition, each member identity within the group can have its own tailored service profile. This allows the system to maintain both the flexibility of wildcard matching at the group level and precise user identification at the individual level where needed.
Data Source
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AI summary
A method of facilitating access to services of an IP Multimedia Subsystem,by users groups that require alternative handling in relation to the standard handling of IP Multimedia Subsystemusers. Functioning instructions are added to the user group s subscription maintained in the IP Multimedia Subsystem, instructing nodes in the IP Multimedia Subsystemto adapt their standard functioning for this specific group of users. The instructionsin a subscription of a specific user group, providea node of the IP Multimedia Subsystemthat does no longer need to be specific for certain types of users,but has a standard way of operation,that is modified by instructions for dedicated operation for only that specific user group. In further aspect embodiments are disclosed providing improved solutions for known problems of IP Multimedia Subsystems making use of functioning instructions included in the subscription.