Base Station Controller IMS Registration Consolidation
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Solution Overview
Problem
Current IMS network registration methods require direct and separate communication between user agents and services, bypassing the S-CSCF, which reduces the simplicity and efficiency of the registration process, especially when multiple services require application-specific data.
Innovation Solution
Base station controllers (BSCs) register with the IMS network on behalf of access terminals, allowing them to engage in IMS communications and reserve resources, thereby reducing the need for individual terminal registrations and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each access terminal registers separately with the IMS network, then the registration process maintains direct communication between user agents and services, but the resource consumption and complexity increase significantly
Solution Approach 1:
The BSC acts as an intermediary entity that performs registration on behalf of multiple access terminals. Instead of each terminal directly registering with the IMS network, the BSC consolidates these registrations, reducing the number of registration transactions while maintaining the ability to reach individual terminals through the established BSC connection.
2Adaptability or versatility
If multiple services require application-specific data during registration, then service functionality is enhanced, but the registration process efficiency is reduced
Solution Approach 1:
The BSC performs preliminary registration actions on behalf of access terminals before individual service-specific registrations are needed. This preliminary consolidation reduces the initial registration overhead, while service-specific data can be exchanged subsequently through the already-established BSC connection, separating the bulk registration from the detailed service configuration.
3Reliability
If the S-CSCF holds registration state in system memory for each user, then service delivery is maintained, but the resource consumption increases
Solution Approach 1:
The BSC merges multiple access terminal registrations into a single consolidated registration with the IMS network. This consolidation reduces the number of separate registration states that need to be maintained in the S-CSCF system memory, as the BSC can manage multiple terminals through its single registered connection, thereby reducing overall memory resource consumption while maintaining service delivery capability.
Data Source
AI summary
Exemplary methods and systems for providing access to IMS services are disclosed herein. An exemplary method involves a first radio access network (RAN) component: (a) sending a registration message to an IMS network in order to register the first RAN component with the IMS network, wherein the IMS registration message provides an IP address at which to register the first RAN component, (b) receiving a service request from a first access terminal, wherein the first RAN component is a serving RAN component for the first access terminal, and (c) in response to receiving the service request, the first RAN component engaging in an IMS service on behalf of the first access terminal, wherein engaging in the IMS service on behalf of the first access terminal comprises sending the IMS network a first initiation message for a session event, wherein the first initiation message comprises: (i) a field that identifies the first access terminal and (ii) a field that includes an IP address of a second RAN component that serves a target access terminal.