Conditional Handover Feedback for LBT and Random Access Failures
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Solution Overview
Problem
In conditional handover procedures, network devices face challenges in identifying the cause of failures, such as LBT failures, leading to suboptimal network parameter adjustments and reduced system performance due to the inability to distinguish between mobility parameter configuration issues and LBT problems.
Innovation Solution
The proposed solution involves the UE reporting specific failure-related information to the network device, allowing the network device to adjust network parameters based on whether the failure is caused by LBT or mobility issues, thereby improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device adjusts network parameters based on handover failure reports, then the handover success rate is improved, but the network device cannot identify the cause of failure leading to suboptimal parameter adjustments
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports detailed failure information (including LBT failure indicators and mobility failure indicators) back to the network device. This enables the network device to identify the specific cause of handover failure and adjust network parameters accordingly, resolving the information loss problem while maintaining improved handover success rate.
Solution Approach 2:
The failure report is segmented into distinct indicators: LBT failure indicator and mobility failure indicator. This segmentation allows the network device to differentiate between LBT-related failures and mobility-related failures, enabling targeted parameter adjustments for each failure type rather than generic adjustments.
2Measurement precision
If the UE reports detailed failure information to the network device, then the network device can identify failure causes and adjust parameters accurately, but the communication protocol complexity increases
Solution Approach 1:
The patent introduces specific parameters (LBT failure indicator and mobility failure indicator) into the existing failure report structure. By changing the report format to include these discrete indicators, the system achieves precise failure cause identification without requiring completely new complex protocols, leveraging existing reporting frameworks.
Solution Approach 2:
The failure report acts as an intermediary structure that carries both LBT and mobility failure indicators. This intermediary mechanism allows detailed failure information to be transmitted through existing communication channels without requiring separate dedicated protocols for each type of failure information.
Data Source
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AI summary
Embodiments of this application provide a communication method and a related device. The method includes: A terminal device receives a conditional handover CHO command from a source base station; the terminal device determines, according to the CHO command, to hand over from a source cell to a target cell; when the terminal device fails to perform channel access LBT in the target cell, or successfully performs LBT and fails to perform random access in the target cell, the terminal device selects a cell; and the terminal device sends first information to a network device. The first information includes a first parameter, and the first parameter is related to a CHO failure caused by the LBT failure in the target cell; or the first information includes a second parameter, and the second parameter is related to a CHO failure caused by the successful LBT and the random access failure in the target cell. According to this application, system performance can be improved.