IMS Wildcard Identity Segmentation for Service Profile Flexibility
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Solution Overview
Problem
Current IMS network standards have limitations in handling wildcarded public identities, particularly in supporting distinct service profiles and preventing impersonation and incorrect service profile applications for identities within the range of a wildcarded public identity, due to the requirement that all identities must be registered and de-registered together and share the same Implicit Registration Set (IRS).
Innovation Solution
Enhancements to the Cx and Mw interfaces in Call Session Control Function (CSCF) nodes and Home Subscriber Server (HSS) allow for the storage and forwarding of information about distinct public identities within the range of a wildcarded identity but not in the same IRS, enabling correct matching and service profile application, and preventing impersonation by rejecting unauthorized requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all identities within a wildcarded public identity range are required to be in the same Implicit Registration Set (IRS), then simplified registration handling is achieved, but flexibility in assigning different service profiles and preventing impersonation is lost
Solution Approach 1:
The patent segments the set of identities within a wildcarded public identity range by creating separate Implicit Registration Sets (IRS) for different service profiles. Instead of forcing all identities into a single IRS, the system divides them into multiple IRS groups, allowing each group to have its own service profile while still being managed under the wildcarded identity framework. This enables flexible service profile assignment while maintaining efficient registration handling.
2Productivity
If wildcarded public identities are used to register thousands of numbers from a single identity, then PBX support is improved, but security against impersonation and incorrect service profile application deteriorates
Solution Approach 1:
The patent applies local quality by assigning different service profiles to different subsets of identities within the wildcarded range. Instead of a uniform service profile for all identities, the system creates localized service profile assignments based on specific IRS groups. This allows the system to maintain high registration efficiency while ensuring that each local group receives the appropriate service profile, thereby preventing incorrect service profile application and impersonation.
3Device complexity
If a single service profile is provisioned for all distinct IMPUs within a wIMPU, then provisioning complexity is reduced, but the ability to provide individualized services deteriorates
Solution Approach 1:
The patent segments the provisioning process by creating multiple service profile groups associated with different IRS sets. Each segment can be provisioned independently with its own service profile, allowing the system to maintain low provisioning complexity for each segment while enabling individualized services across different segments. This segmented approach avoids the need for completely individual provisioning of each IMPU while still providing individualized service capabilities.
Data Source
AI summary
The present invention concern methods and apparatuses for handling public identities in an Internet Protocol Multimedia Subsystem, IMS, network. A CSCF node receives information indicating a set of distinct public identities, within a range of a wildcarded public identity, which set of distinct public identities are not in the same Implicit Registration Set (IRS) as the wildcarded public identity. The information is received from a Home Subscriber Server (HSS) node. The CSCF node stores the information indicating the set of distinct public identities, which are not in the same IRS, in the CSCF node for allowing matching of an originating request to the information indicating the set of distinct public identities, which are not in the same IRS. Alternatively, the CSCF node forwards the information indicating the set of distinct public identities, which are not in the same IRS, to another CSCF node, for allowing matching of an originating request to the information indicating the set of distinct public identities, which are not in the same IRS.