Candidate Cell Timing Advance Handling for Uplink Handover Failures
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Solution Overview
Problem
In communication systems, terminals may fail to send uplink signals or experience timing advance (TA) changes to unavailable states during cell handovers, leading to inefficiencies and potential communication disruptions.
Innovation Solution
A method and device for determining and addressing uplink signal failures or TA unavailability by acquiring the TA of candidate cells or stopping the uplink signal, and sending failure information to network devices to manage handovers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal pre-acquires TA of candidate cells to improve handover efficiency, then handover efficiency is improved, but the terminal may fail to send uplink signals or experience TA changes to unavailable states
Solution Approach 1:
The terminal pre-acquires TA of candidate cells before handover to enable direct communication after handover, improving handover efficiency. This preliminary action allows the terminal to skip the TA acquisition process in the target cell, achieving faster handover while maintaining communication reliability through proper failure detection and reporting mechanisms
Solution Approach 2:
The terminal monitors the validity of pre-acquired TA values and detects when uplink signal transmission fails or TA becomes unavailable. Failure information is reported to the network device, which provides feedback to adjust handover parameters or reconfigure candidate cells, ensuring reliable communication despite the preliminary TA acquisition approach
2Reliability
If the terminal sends uplink signal to acquire TA of candidate cell, then TA acquisition reliability is improved, but handover efficiency deteriorates due to additional processing time
Solution Approach 1:
The terminal acquires TA of candidate cells in advance during the cell selection and evaluation phase, before the actual handover is triggered. This preliminary TA acquisition eliminates the need for uplink signal transmission and TA measurement in the target cell, reducing handover processing time while ensuring reliable TA values through proper validation and monitoring mechanisms
Data Source
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AI summary
The present invention provides a processing method, an apparatus, a device, and a storage medium. The method comprises: when determining that transmission of an uplink signal of a terminal on a candidate cell fails, and/or determining that TA of the candidate cell is changed into an unavailable state, executing first processing, wherein the first processing is used for implementing one of the following: acquiring TA of a candidate cell, and stopping transmitting an uplink signal. Embodiments of the present invention provide a processing method for the situation where "transmission of an uplink signal of a terminal on a candidate cell fails, and/or TA of the candidate cell is changed into an unavailable state", and provide a deterministic reference for further action, so as to avoid the occurrence of the situation of "signal transmission interference and power loss caused by the terminal not knowing what processing needs to be executed when transmission of the uplink signal of the terminal on the candidate cell fails, and/or TA of the candidate cell acquired by the terminal is changed from an available state into an unavailable state", thereby ensuring the communication stability of the terminal.