5G Session Management Bearer Context Validation
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Solution Overview
Problem
In 5G mobile communication systems, semantic errors in mapped EPS bearer contexts can lead to failures in service continuity during inter-system changes from 5G to 4G networks, due to invalid or missing parameters in EPS bearer contexts.
Innovation Solution
A method and apparatus for User Equipment (UE) to examine mapped EPS bearer contexts for invalid or missing parameters, and send a message to delete such contexts, ensuring proper handling and preventing service disruptions by identifying and correcting semantic errors in parameters like QoS and TFT parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE automatically accepts mapped EPS bearer contexts during inter-system change, then the inter-system change procedure is simple and fast, but semantic errors with invalid or missing parameters cause service continuity failure
Solution Approach 1:
The UE performs preliminary validation of mapped EPS bearer context parameters before accepting them during inter-system change. The device checks for semantic errors, invalid values, and missing mandatory parameters in advance, preventing erroneous contexts from being established and ensuring service continuity without requiring complex post-establishment correction mechanisms.
2Reliability
If the UE performs detailed validation of mapped EPS bearer context parameters, then service continuity is maintained, but the inter-system change procedure becomes more complex and time-consuming
Solution Approach 1:
The patent replaces complex manual parameter validation with automated validation mechanisms implemented in the UE's protocol stack. The device automatically checks mapped EPS bearer contexts for semantic errors, invalid parameters, and missing mandatory fields using predefined validation rules, eliminating the need for time-consuming manual verification while maintaining high reliability.
3Reliability
If the UE deletes mapped EPS bearer contexts with semantic errors, then service continuity is preserved, but additional signaling messages are required increasing procedure overhead
Solution Approach 1:
The UE performs preliminary validation of mapped EPS bearer contexts before finalizing the inter-system change. By detecting semantic errors, invalid parameters, and missing mandatory fields in advance, the device can selectively delete only the erroneous contexts while accepting valid ones, avoiding the need for comprehensive re-negotiation and reducing overall signaling overhead.
Data Source
AI summary
A method, executed by a User Equipment (UE) communicatively connected to a mobile communication network, is provided. The method may include the following steps: receiving a first 5G Session Management (5GSM) message including one mapped Evolved Packet System (EPS) bearer context for an inter-system change from the mobile communication network; determining whether the mapped EPS bearer context has invalid or missing parameters; and sending a second 5GSM message to the mobile communication network to delete the mapped EPS bearer context in response to the mapped EPS bearer context has one or more invalid or missing parameters.