Cell Handover Synchronization Skipping for Reduced Service Interruption
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Solution Overview
Problem
Current cell handover processes in wireless communication systems experience delays and service interruptions due to the need for synchronization with target cells, especially after handover failures, which affects the efficiency and performance of the system.
Innovation Solution
The solution involves a handover command from the base station that includes information on the timing sequence relationship of target cells, allowing the terminal to select a cell in slot synchronization for reestablishment, thereby omitting the synchronization step and reducing time delays and service interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs synchronization with the target cell during handover or reestablishment, then the handover can be completed successfully, but time delay and service interruption occur
Solution Approach 1:
The base station performs slot synchronization configuration in advance during the handover command phase, preparing the timing sequence relationship between target cells before the terminal actually needs to perform handover or reestablishment. This preliminary synchronization setup allows the terminal to skip the time-consuming synchronization step during critical handover moments, thereby reducing time delay while ensuring handover success
Solution Approach 2:
The terminal copies the synchronization timing information from the handover command received from the base station, using the pre-configured slot synchronization relationship to directly establish connection with the target cell without performing full synchronization procedures, thus eliminating synchronization-related time delays
2Reliability
If the terminal selects a target cell for reestablishment after handover failure, then connection can be restored, but service interruption time increases due to synchronization requirements
Solution Approach 1:
The base station pre-configures slot synchronization relationships for multiple candidate target cells in the handover command, enabling the terminal to immediately select and connect to an alternative cell upon handover failure without undergoing synchronization delays, thus reducing service interruption duration while ensuring connection reestablishment
Solution Approach 2:
The terminal skips the synchronization step entirely during reestablishment by utilizing the pre-configured timing sequence relationship from the handover command, rushing through the connection restoration process directly to minimize service interruption time
Data Source
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AI summary
The present disclosure relates to the technical field of wireless communication, and disclosed thereby is a cell handover method. The method comprises: receiving a handover instruction and time sequence relationship sent by a base station, the handover instruction being used for indicating a terminal switching to one from among at least two target cells, and the time sequence relationship being used for indicating whether any two cells among the at least two target cells are synchronized in time slot; synchronizing with a first cell among the at least two target cells∼ initiating handover to the first cell according to the synchronization result with the first cell, and determining a second cell among the at least two target cells after handover fails, the second cell being synchronized in time slot with the first cell; and initiating connection reconstruction to the second cell according to the synchronization result with the first cell. In the described solution, the step of synchronization may be skipped during reconstruction so as to improve the efficiency of cell handover and the communication effect of a system.