Static Registration for Non-Registering Endpoints in IMS Networks
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Solution Overview
Problem
Service providers face challenges in providing IMS network services to non-registering endpoints, where the identification of the calling party is not preserved, and the PUID/PAI header meanings differ for business and wholesale customers, making it difficult to offer seamless communication services.
Innovation Solution
Non-registering endpoints are statically registered onto the data network, with multiple S-CSCF and P-CSCF servers assigned for redundancy and load sharing, using the P-Served-User header to identify and trigger services, and employing wildcard PUIDs for flexible subscriber number handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-registering endpoints are supported without static registration, then endpoint flexibility and ease of connection are improved, but calling party identification cannot be preserved and service provisioning fails
Solution Approach 1:
The system performs preliminary provisioning of non-registering endpoints with static registration data before actual service use. The HSS stores pre-configured P-Served-User headers and associated S-CSCF/P-CSCF server information for NREs, enabling the network to identify and route calls to these endpoints without requiring them to perform dynamic registration. This preliminary configuration preserves calling party identification while maintaining endpoint flexibility.
2Reliability
If multiple S-CSCF and P-CSCF servers are assigned for redundancy, then network reliability is improved, but system complexity increases
Solution Approach 1:
The HSS serves as a universal provisioning repository that stores P-Served-User header information for multiple S-CSCF and P-CSCF servers associated with each non-registering endpoint. This single HSS instance manages redundancy for all servers, eliminating the need for individual configuration on each server and reducing overall system complexity while maintaining high availability through multiple server assignments.
3Adaptability or versatility
If PUID headers are customized for different customer types, then service differentiation is improved, but network configuration complexity increases
Solution Approach 1:
The system applies different P-Served-User header formats and PUID structures locally according to customer type. Business customers receive P-Served-User headers configured for call-back number identification, while wholesale customers receive headers configured for originating calling party identification. This localized customization is managed centrally in the HSS, allowing service differentiation without requiring complex configuration changes across the entire network infrastructure.
Data Source
AI summary
Many of the current IMS standards and enriched services were originally designed for the individual subscribers that are serviced by the wireless network. However, the IMS standards do not fully address the problem of providing the IMS enriched services and features to business PBX customers or wholesale customers that do not directly register to the IMS network. The present invention discloses a method for providing IMS enriched services and features to business PBX customers or wholesale customers through the use of a static provisioning and registration method.