Session Management Module Failure Recovery in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, managing sessions efficiently and robustly against failures is challenging, especially in scenarios where session management modules experience failures, leading to disruptions in service delivery.
Innovation Solution
A method and apparatus for managing sessions in wireless communication systems that involve identifying a failed session management module, determining a substitute module, obtaining necessary information from a control plane entity, and controlling the substitute module to manage sessions based on the obtained information, including transmitting requests and receiving session information through specific messages like N4 association setup requests or PDU session establishment requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If session management modules are used to manage sessions in wireless communication systems, then service delivery is enabled, but system reliability deteriorates when failures occur in the modules
Solution Approach 1:
The system performs preliminary actions by pre-identifying substitute session management modules before failures occur. When a failure is detected, the already-prepared substitute module can immediately take over, eliminating the need for complex real-time selection and reducing system downtime without increasing operational complexity
Solution Approach 2:
The patent creates copy instances of session management modules (substitute modules) that can replace failed original modules. These copies maintain the same functional capabilities, ensuring service continuity while simplifying the failure recovery process through standardized replacement procedures
2Reliability
If session management modules experience failures, then service disruption occurs, but implementing complex failure detection and recovery mechanisms increases system complexity
Solution Approach 1:
The system implements feedback mechanisms where session management modules continuously monitor each other's operational status. When a failure is detected through this feedback loop, the system automatically triggers the substitute module activation process, ensuring service continuity through simple, automated responses rather than complex manual intervention procedures
Solution Approach 2:
The patent introduces an intermediary mechanism (the substitute module) that mediates between the failed session management module and the sessions it manages. This intermediary takes over the management responsibilities seamlessly, maintaining service continuity while simplifying the overall failure management architecture through a standardized mediation layer
3Reliability
If substitute modules are used to replace failed modules, then service delivery continues, but information transfer overhead increases due to obtaining session information from control plane entities
Solution Approach 1:
The system performs preliminary actions by pre-establishing communication channels and preparing session information structures in the control plane entity before failures occur. When a substitute module needs to take over, the required session information is already formatted and ready for rapid transfer, minimizing retrieval time while ensuring service availability
Data Source
AI summary
Provided are a method and apparatus for managing a session in a wireless communication system. The method includes identifying a session management module with a failure from among a plurality of session management modules that each manage at least one session; determining a substitute module that replaces the session management module with the failure; obtaining, from a control plane entity, information about at least one session managed by the session management module with the failure; and controlling the substitute module to manage the at least one session, based on the obtained information about the at least one session.