Wireless Node RLF Reporting Based on Candidate Cell Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing network coverage and mobility robustness due to unnecessary Radio Link Failure (RLF) reporting and storage, which increase signaling overhead and complexity during radio connection failures.
Innovation Solution
A method and device for wireless communication that selectively manages RLF reporting and storage by determining whether a target cell belongs to a candidate cell set, and only transmitting RLF-related messages when necessary, thereby reducing unnecessary reporting and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE stores and reports RLF information after radio connection failure, then network optimization and mobility robustness can be improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent extracts and removes the RLF information from the UE's storage and reporting mechanisms when the failure occurs in a non-candidate cell. By taking out the unnecessary RLF reporting requirement, the system reduces signaling overhead and complexity while maintaining reliability for important failures in candidate cells.
Solution Approach 2:
The patent applies different quality treatment to different cell types: RLF information is stored and reported only when the failure occurs in a candidate cell (local quality enhancement), while failures in non-candidate cells do not trigger RLF reporting. This selective approach optimizes the balance between reliability and complexity.
2Loss of information
If the UE reports RLF information for all failures, then complete failure data is available for network optimization, but signaling overhead increases
Solution Approach 1:
The patent extracts unnecessary RLF reporting cases by identifying that failures in non-candidate cells do not require reporting. This removal of redundant reporting significantly reduces signaling overhead while maintaining complete and meaningful failure data for network optimization through selective reporting of candidate cell failures.
Solution Approach 2:
Instead of reporting all RLF information (excessive action), the patent implements partial reporting only for candidate cell failures. This partial action approach reduces signaling overhead while providing sufficient information for effective network optimization.
3Reliability
If the UE performs RRC Reestablishment for radio connection failure, then connection recovery is achieved, but data transmission interruption occurs
Solution Approach 1:
The patent prepares CHO candidate cells in advance with pre-configured parameters and execution conditions. When a radio connection failure occurs, the UE can immediately execute the pre-prepared CHO to a suitable candidate cell, avoiding the time-consuming RRC Reestablishment process and reducing data transmission interruption.
Solution Approach 2:
The patent implements dynamic cell selection through CHO, where the UE can switch from the failed cell to a pre-identified candidate cell based on real-time conditions. This dynamic approach enables faster connection recovery compared to the static RRC Reestablishment process.
Data Source
AI summary
A method and a device in a communication node for wireless communications are provided in the present disclosure. A communication node receives a first signaling, the first signaling indicating a first candidate cell set; and determines a radio connection failure; and as a response to the determined radio connection failure, selects a first target cell; when the first target cell does not belong to the first candidate cell set, transmits a second signaling, the second signaling comprising first information; when the first target cell is a candidate cell in the first candidate cell set, transmits a third signaling, the third signaling not comprising the first information. The present disclosure proposes a scheme which reports no RLF-related message after recovery of radio connection failure, thus avoiding unnecessary information reporting and reducing signaling overhead, to the benefit of network optimization.