IMS Registration S-CSCF Selection by Subscriber Location
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Solution Overview
Problem
The Internet Protocol (IP) Multimedia Subsystem (IMS) lacks sufficient controls over the assignment of control functions to user equipment (UE), often assigning a control function geographically distant from the UE, leading to increased network overhead and latency, which affects network operations and user experience.
Innovation Solution
Implementing a method on a network computing device to manage IMS registration by selecting a Serving Call Session Control Function (S-CSCF) based on subscriber location information and S-CSCF location information, ensuring a geographically close S-CSCF is assigned to the UE, and if the first selected S-CSCF is unavailable, selecting a second S-CSCF for registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the IMS assigns a control function to a UE without geographic consideration, then the assignment process is simple and fast, but the network overhead increases and latency increases
Solution Approach 1:
The patent applies preliminary action by obtaining S-CSCF location information in advance during the UE registration process, before the actual control function assignment is made. This allows the network to proactively select an geographically close S-CSCF, reducing subsequent network latency without significantly impacting the assignment speed.
2Loss of time
If the IMS assigns a control function geographically close to the UE, then network overhead is reduced and latency is reduced, but the control over assignment becomes more complex
Solution Approach 1:
The patent introduces an intermediary mechanism by utilizing the HSS to provide S-CSCF location information. This intermediary component facilitates the geographic-based assignment process without requiring complex control logic in the core assignment mechanism, thereby reducing network latency while managing complexity through a dedicated information source.
3Adaptability or versatility
If the IMS uses multiple S-CSCFs for load balancing, then network management flexibility is improved, but the complexity of selecting and managing S-CSCFs increases
Solution Approach 1:
The patent applies local quality by selecting S-CSCFs based on their specific geographic locations relative to each UE. Instead of treating all S-CSCFs uniformly, the system evaluates location-specific characteristics to make assignment decisions, enabling load balancing flexibility while managing selection complexity through a clear geographic criterion.
Data Source
AI summary
Various embodiments include network computing devices and methods for computing resource management. Various embodiments include network computing devices and methods for managing IP Multimedia Subsystem (IMS) registration of a user equipment (UE). A processor of a network computing device may send to a home subscriber server (HSS) a user authorization request in response to receiving a registration request from the UE. The processor may receive from the HSS a user authorization answer comprising subscriber location information associated with the UE. The processor may send a registration request to register the UE with a serving CSCF (S-CSCF) based on the subscriber location information and S-CSCF location information.