Conditional Reestablishment for Wireless Link Recovery
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reestablishing communication links after failures, leading to latency and reduced mobility robustness, particularly in scenarios like 5G NR and NB-IoT networks.
Innovation Solution
The method involves conditional reestablishment configuration information being transmitted from a base station to user equipment, allowing the equipment to evaluate execution conditions for candidate cells and initiate reestablishment procedures based on these conditions, along with a command-based approach to optimize link reestablishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional reestablishment procedure is used after link failure, then communication link can be restored, but reestablishment latency is high and mobility robustness is reduced
Solution Approach 1:
The patent applies preliminary action by pre-configuring conditional reestablishment information including candidate cell lists and execution conditions before link failure occurs. The UE proactively evaluates conditions (such as signal quality thresholds) and initiates reestablishment to candidate cells in advance, rather than reacting after failure. This reduces reestablishment latency while improving mobility robustness through pre-planned recovery paths
2Productivity
If reestablishment procedure is simplified to reduce latency, then reestablishment speed improves, but reestablishment reliability may be compromised
Solution Approach 1:
The system performs preliminary configuration of multiple candidate cells and their associated execution conditions before failure occurs. This allows the UE to quickly select from pre-evaluated options without complex real-time decision-making, maintaining high reestablishment speed while ensuring reliability through pre-validated candidate selections
Solution Approach 2:
The patent changes the parameter of reestablishment decision-making from reactive (after failure) to proactive (before failure). By configuring execution conditions such as signal quality thresholds and candidate cell priorities in advance, the system enables fast yet reliable reestablishment through pre-determined parameters rather than post-failure analysis
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatuses for reestablishment in a wireless communication system. According to some embodiments of the present disclosure, a method includes: receiving, at a user equipment (UE) from a first base station (BS), conditional reestablishment configuration information indicating a set of execution conditions for a set of candidate cells; and evaluating the set of execution conditions based on the conditional reestablishment configuration information in response to the reception of conditional reestablishment configuration information. The leaving indication is sent to the serving cell in response to the initiation of the conditional reestablishment. The RLF report is reported in response to the failure of conditional reestablishment or an RLF event when the conditional reestablishment is configured.