Radio Link Failure Report Extensions for Mobile Networks
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Solution Overview
Problem
Current radio link failure reports in LTE networks lack sufficient UE state and configuration information, making it difficult for the network to assess performance targets and apply corrective actions effectively, especially since UE state and configuration details are not reliably known, leading to potential handover failures and coverage issues.
Innovation Solution
Incorporating UE measurement state information into radio link failure reports, including details on measurement event triggering conditions, UE speed state, and DRX performance, to enable the network to determine appropriate corrective actions such as adjusting reporting criteria, power control, and inter-cell interference coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE state and configuration information is not included in RLF reports, then the report structure remains simple and easy to process, but the network cannot effectively assess performance targets and apply corrective actions
Solution Approach 1:
The patent applies preliminary action by having the UE store and prepare measurement state information (including measurement events, reporting criteria, speed state, and DRX performance) before the handover failure occurs. This pre-prepared information is then included in the RLF report, enabling the network to perform effective analysis and corrective actions without requiring real-time data collection during the failure event.
2Reliability
If measurement state information is added to RLF reports, then the network can better assess and mitigate failures, but the report complexity and processing overhead increase
Solution Approach 1:
The patent applies segmentation by dividing the measurement state information into distinct, organized components within the RLF report structure. The information is segmented into measurement events, reporting criteria, UE speed state, and DRX performance metrics. This structured segmentation makes the complex information easier to process and analyze while maintaining comprehensive diagnostic capability.
Data Source
AI summary
A method of reporting UE measurement state information in RLF report is provided. A UE performs radio measurements of a serving cell and neighbor cells in a mobile communication network. The UE evaluates a measurement reporting criteria and attempts to access the network to deliver a measurement report if the criteria is met. The UE then detects a radio link failure or a handover failure event and reconnects to the network by performing RRC reestablishment or RRC establishment. Finally, the UE transmits a failure event report to the network. The failure event report comprises UE measurement state information corresponds to the failure event. The UE measurement state information helps the network to determine whether to apply corrective actions to mitigate the failure.