Moving Cell Handover Autonomy Reducing Interruption Time
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Solution Overview
Problem
In wireless communication systems, moving cells face challenges in rapidly performing handovers due to inefficiencies in acquiring information about target cells, leading to increased data interruption times.
Innovation Solution
A method where the moving cell independently determines and triggers handovers by directly accessing the target base station, reducing the need for measurement reports from the source base station and minimizing data interruption time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the moving cell follows the conventional handover procedure requiring measurement reports from the source base station, then the handover process maintains network control and coordination, but the handover time is extended and data interruption increases
Solution Approach 1:
The moving cell autonomously performs handover by independently selecting target cells and initiating handover procedures without requiring measurement reports or decisions from the source base station. The moving cell serves itself in the handover process, eliminating the need for complex inter-base station coordination and significantly reducing handover time and data interruption.
2Productivity
If the moving cell independently determines handover targets, then the handover speed increases and data interruption decreases, but the network loses centralized control over handover decisions
Solution Approach 1:
The network performs preliminary configuration by providing the moving cell with a list of candidate target cells and their associated parameters before handover is needed. This preliminary action enables the moving cell to make rapid autonomous decisions during handover while ensuring that only network-approved target cells are selected, thus maintaining network control reliability without sacrificing handover speed.
3Reliability
If the moving cell uses conventional handover methods requiring source base station coordination, then network coordination is maintained, but data interruption time increases due to additional signaling overhead
Solution Approach 1:
The invention extracts the handover decision-making function from the source base station and transfers it to the moving cell. By removing the source base station from the handover decision process, the patent eliminates the signaling overhead and coordination delays that cause data interruption, while maintaining network reliability through preliminary candidate cell configuration and post-handover notification mechanisms.
Data Source
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Figure 2
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AI summary
A method for supporting handover of a moving entity by a serving base station comprises transmitting a measurement configuration message including measurement configuration regarding neighboring base stations, to the moving entity; receiving a handover accept message from a target base station, to which the moving entity will perform handover, among the neighboring base stations; and transmitting a radio resource control (RRC) reconfiguration message indicating reconfiguration of RRC connection, to the moving entity, wherein a handover initiation scheme and a target base station selection scheme are determined according to whether the moving entity is a mobile terminal or a moving cell.