Base Station Time Quality Delivery During UE Handover
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Solution Overview
Problem
Existing wireless communication systems face challenges in maintaining time synchronization during user equipment mobility, particularly in ensuring continuous time synchronization services as user equipment moves between different base stations or network areas.
Innovation Solution
Implementing a method where target base stations receive time delivery configurations or areas from the network, determining and delivering time quality information to user equipment during handover or base station switching procedures, using clock quality acceptance criteria and time delivery areas to ensure seamless time synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time synchronization is maintained during UE mobility through continuous delivery of time quality information, then time synchronization reliability is improved, but network resource consumption and system complexity increase
Solution Approach 1:
The source base station performs preliminary action by including time delivery configuration information in the handover required message before the actual handover occurs. This allows the target base station to be pre-configured with the necessary time quality information delivery parameters, ensuring continuous synchronization without increasing operational complexity during the handover execution phase.
Solution Approach 2:
The core network acts as an intermediary by receiving the time delivery configuration from the source base station and forwarding it to the target base station through the handover request message. This intermediary mechanism ensures proper routing and delivery of time quality information across different network elements during UE mobility, maintaining synchronization reliability without requiring direct complex coordination between all nodes.
2Stability of the object's composition
If time quality information is delivered continuously during handover procedures, then time synchronization continuity is improved, but information transmission overhead increases
Solution Approach 1:
The patent extracts only the essential time delivery configuration information (including clock quality acceptance criteria, clock quality level, and synchronization status) from the complete handover procedure. By separating and transmitting only these critical parameters rather than all handover details, the system maintains time synchronization continuity while minimizing information transmission overhead during the handover process.
Solution Approach 2:
The time delivery configuration information is extracted and prepared in advance by the source base station and included in the handover required message. This preliminary extraction and preparation of only the necessary time quality parameters ensures that when the handover executes, the time synchronization information is already ready at the target base station, maintaining continuity without requiring additional information transmission during the critical handover moment.
3Measurement precision
If clock quality metrics are transmitted to UE during handover, then time synchronization accuracy is improved, but processing requirements and latency increase
Solution Approach 1:
The source base station performs preliminary action by determining and including the time delivery configuration information (with clock quality metrics) in the handover required message before initiating the handover procedure. This allows the target base station to receive and process the time synchronization information in advance, reducing the processing time and latency during the actual handover execution while maintaining high time synchronization accuracy.
Solution Approach 2:
The core network performs preliminary action by receiving and processing the time delivery configuration from the source base station and forwarding it to the target base station before the handover completes. This preliminary processing of clock quality metrics by the core network distributes the processing load and reduces the processing time requirement at the target base station during the critical handover moment, maintaining synchronization accuracy while reducing latency.
Data Source
AI summary
Time synchronization can be maintained during mobility of the UE by utilizing communications with a target base station. The target base station may receive a time delivery configuration or a time delivery area from the network. The time delivery configuration or a time delivery area is used to determine a delivery of time quality information, which can be utilized by the UE.