MME Handling Duplicated E-RAB IDs in Dual Connectivity
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Solution Overview
Problem
In wireless communication systems, especially in dual connectivity scenarios, abnormal cases can occur during evolved universal terrestrial radio access network (E-UTRAN) radio access bearers (E-RAB) modification, where E-RAB identifiers (IDs) are set to the same value, leading to unhandled errors and potential service disruptions.
Innovation Solution
A method and apparatus are provided for a mobility management entity (MME) to receive an E-RAB modification indication message and trigger a user equipment (UE) context release procedure when multiple E-RAB IDs are set to the same value, using a cause value to manage the release and prevent service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If E-RAB modification indication message is processed without validation, then processing speed is maintained, but system reliability deteriorates due to duplicated E-RAB IDs causing service disruptions
Solution Approach 1:
The patent applies preliminary action by validating E-RAB IDs in the modification indication message before processing the modification. The MME checks whether multiple E-RAB IDs have duplicate values prior to executing the modification operation, preventing service disruptions caused by duplicate identifiers while maintaining reliable system operation.
2Reliability
If duplicated E-RAB IDs are detected and handled, then service disruption is prevented, but processing time increases due to additional validation steps
Solution Approach 1:
The patent replaces complex error handling mechanisms with a simple validation check. Instead of implementing sophisticated error detection and recovery procedures for duplicated E-RAB IDs, the system uses a straightforward comparison operation to identify duplicates before processing, significantly reducing processing time while ensuring service continuity.
3Ease of operation
If E-RAB modification is performed without duplicate detection, then processing simplicity is maintained, but error handling capability deteriorates leading to unhandled abnormalities
Solution Approach 1:
The patent applies self-service by enabling the MME to autonomously detect and handle duplicated E-RAB IDs within the modification indication message. The system performs self-validation of the received message, identifying duplicate identifiers and managing the abnormal situation without requiring external intervention or complex error handling procedures from other network elements.
Data Source
AI summary
A method and apparatus for handling duplicated evolved universal terrestrial radio access network (E-UTRAN) radio access bearers (E-RABs) for dual connectivity in a wireless communication system is provided. A mobility management entity (MME) receives an E-RAB modification indication message including several E-RAB identifiers (IDs) set to the same value, and triggers a user equipment (UE) context release procedure with a cause value.