Radio Link Failure Optimization for Bearer Splitting
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Solution Overview
Problem
In the context of layered network architectures with coexisting eNBs, existing protocols fail to effectively address radio link failures (RLF) related to bearer splitting, leading to inappropriate setting of mobility parameters, which affects UE connectivity and network performance.
Innovation Solution
A network optimization method and device that receives RLF reports from User Equipment (UE) to determine connection failure reasons related to bearer splitting, allowing macro base stations to adjust parameters such as bearer split timing and cell selection, thereby optimizing bearer splitting procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bearer splitting is implemented in layered network architecture, then network coverage and resource utilization are improved, but radio link failure rate increases due to inappropriate bearer splitting parameters
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports RLF information to the network side, and the network optimizes bearer splitting parameters based on this feedback. The network receives RLF reports from the UE, analyzes the failure reasons, and adjusts bearer splitting parameters accordingly to prevent future failures.
Solution Approach 2:
The patent focuses on optimizing bearer splitting parameters such as split timing, split conditions, and parameter thresholds. By dynamically adjusting these parameters based on network conditions and UE reports, the system achieves more reliable bearer splitting while maintaining network coverage benefits.
2Reliability
If bearer splitting parameters are frequently adjusted, then connection reliability is improved, but network complexity and processing overhead increase
Solution Approach 1:
The patent performs preliminary analysis of RLF reports and identifies failure reasons before adjusting parameters. The network side pre-configures optimization strategies and only activates parameter adjustments when specific failure conditions are detected, avoiding unnecessary complexity.
Solution Approach 2:
The patent applies different optimization strategies for different types of RLF scenarios. Instead of uniformly adjusting all bearer splitting parameters, the system identifies specific local issues (e.g., handover-related failures vs. coverage-related failures) and applies targeted parameter adjustments only where needed.
3Measurement precision
If RLF reports are processed in detail to identify failure reasons, then parameter optimization accuracy is improved, but processing time and system latency increase
Solution Approach 1:
The patent segments the RLF report processing into distinct phases: report reception, failure reason identification, optimization decision, and parameter adjustment. This segmentation allows parallel processing of different functions and reduces overall processing time while maintaining analysis accuracy.
Solution Approach 2:
The patent applies partial analysis of RLF reports by focusing on the most critical failure indicators and using threshold-based filtering. Instead of analyzing every detail of each report, the system identifies key failure patterns and applies optimized processing only when necessary, reducing processing time while maintaining sufficient accuracy.
Data Source
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AI summary
Disclosed are a network optimization method, device and system for a radio link failure (RLF), the method comprising: if a local base station determines, after receiving an RLF report transmitted by a UE, that the RLF report is a link failure related to bearer separation, then transmitting the RLF report to a macro eNB; the macro eNB determines the cause of the link failure according to the RLF report and a bearer separation and recovery process, such that the macro eNB involved in the cause of the link failure conducts parameter adjustment, thus achieving self-configuration and self-optimization according to the RLF report reported by the UE when setting the parameter related to bearer separation.