IP Communication Connection Control Instance Switching Without Re-registration
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Solution Overview
Problem
In IP-based communication systems, partial system failures lead to 'registration storms' when end users must re-register due to failed connection control entities, causing service impairments and increased network costs.
Innovation Solution
Implementing a method where a repeat registration request is sent instead of a new registration request, utilizing an existing valid registration, with end user-related data stored in a shared database, allowing the backup connection control entity to access this data without requiring end users to re-authenticate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If end users must re-register when connection control instances fail, then system reliability is improved through re-authentication, but registration storms occur causing service disruptions and increased network costs
Solution Approach 1:
The patent applies preliminary action by pre-storing end user-specific registration data in a shared database before failure occurs. When a connection control instance fails, the backup instance can immediately access this pre-stored data to perform re-registration without requiring users to re-authenticate, thus preventing registration storms while maintaining system reliability
Solution Approach 2:
The patent introduces a shared database as an intermediary between connection control instances and end user registration data. This intermediary stores registration data centrally, allowing backup instances to retrieve it without direct user re-authentication, thereby resolving the contradiction between reliability and service continuity
2Productivity
If network nodes are made robust to handle registration storms, then service continuity is improved, but network expansion costs increase
Solution Approach 1:
The patent extracts the registration data storage function from individual connection control instances and places it in a shared database. This extraction eliminates the need for each node to be individually robust against registration storms, reducing network expansion costs while maintaining service continuity through centralized data access
3Reliability
If re-registration process is implemented, then system security is maintained through re-authentication, but service disruption time increases
Solution Approach 1:
The patent applies preliminary action by pre-storing authenticated registration data in a shared database before failure occurs. When failure happens, the backup instance retrieves this pre-authenticated data immediately, maintaining system security through stored authentication credentials while reducing service disruption time by eliminating the need for real-time re-authentication
Data Source
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AI summary
The invention relates to a method and an IP communication system (10, 50) for switching connection control instances (11, 13; 51, 53) without re-registering end users (30; 70) that are previously registered with an IP-based communication system using an IP-based signaling protocol. Re-registration of at least one end user (30, 70) can be prevented in the event of a failure of a connection control instance (11, 51) that is primarily assigned to the end user (30, 70) by allowing an existing valid registration of the at least one end user (30, 70) to continue to be used even when switching from the failed connection control instance (11, 51) to a replacement connection control instance (13, 53).For this purpose, after successful authentication of the end users (30, 70), end user-related registration data is stored in a shared database (12, 52) that is at least effectively connected to the IP-based communication system (10, 50). If the primary connection control instance (11, 51) fails, the backup connection control instance (13, 53) can access the end user-related registration data.