Synchronized Handover Mechanism for Mobile Base Stations
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Solution Overview
Problem
In mobile communication systems, handover processes result in data interruption times due to the source base station transmitting unnecessary data to the target base station, leading to resource wastage, as the source base station is unaware of the handover timing.
Innovation Solution
A method where the source base station transmits a handover command message to the terminal, allowing it to inform both the source and target base stations of the handover timing, enabling synchronized data interruption and transfer, thereby minimizing data interruption time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the source base station continues transmitting data to the terminal during handover to maintain connection, then the interruption time is reduced, but unnecessary data is forwarded to the target base station causing resource wastage
Solution Approach 1:
The terminal feeds back handover execution timing information to the source base station after receiving the handover command. This feedback mechanism enables the source base station to know when the terminal will actually execute handover, allowing it to stop data transmission at the precise moment rather than continuing unnecessarily, thus resolving the contradiction between maintaining connection and avoiding resource waste
Solution Approach 2:
The source base station pre-forwards data to the target base station based on the terminal's handover execution timing information before the handover actually occurs. This preliminary action ensures data is ready at the target base station when handover happens, minimizing interruption time while avoiding continuous unnecessary transmission after handover completion
2Reliability
If the source base station forwards data to the target base station without knowing handover timing, then data continuity is maintained, but base station resources are wasted
Solution Approach 1:
The terminal provides feedback about its handover execution timing to the source base station. This feedback allows the source base station to precisely control data forwarding operations, stopping exactly when needed rather than continuing indefinitely, thus maintaining data continuity while conserving base station resources
3Ease of operation
If the source base station transmits data to the terminal after handover, then connection is maintained, but radio resources are wasted
Solution Approach 1:
The terminal feeds back handover execution timing information to the source base station, enabling the source base station to stop data transmission at the precise moment of handover. This resolves the contradiction by maintaining connection reliability while eliminating unnecessary radio resource consumption after handover completion
Data Source
AI summary
A method and an apparatus for synchronized handover in a mobile communication system are provided. A source base station providing data to a terminal transmits a handover command message for handover to a target base station to the terminal, and interrupts transmission of data to the terminal when the source base station receives a message for informing a handover execution timing from the terminal later. In addition, the source base station forwards data on the terminal to the target base station.