Handover Parameter Selection for High-Speed Mobile Terminals
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Solution Overview
Problem
In heterogeneous mobile communication networks, high-speed moving radio terminals frequently switch between base stations, leading to unnecessary resource consumption due to the small cell size of low-power base stations, resulting in inefficient resource allocation and increased overhead.
Innovation Solution
A mobile communication method where base stations notify radio terminals of specific parameters for high-speed and non-high-speed movement, allowing the terminals to selectively inhibit switching to low-power base stations, thereby optimizing handover processes and reducing unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a radio terminal moving at high speed switches to a low-power base station, then the terminal can access the heterogeneous network, but the terminal must immediately switch to another base station due to the small cell size, causing resource waste
Solution Approach 1:
The patent applies dynamics by making the handover parameter selection adaptive to the terminal's movement state. The terminal dynamically selects between first parameters (for high-speed movement) and second parameters (for non-high-speed movement) based on its current movement speed, allowing the system to optimize handover behavior in real-time according to terminal mobility conditions
Solution Approach 2:
The patent implements parameter changes by providing multiple sets of handover parameters with different configurations. The network configures first parameters that inhibit switching to low-power base stations for high-speed terminals, while providing second parameters that allow such switching for non-high-speed terminals. The terminal changes the active parameter set based on its movement state, thereby resolving the contradiction between network access and resource waste
2Reliability
If the terminal switches frequently between base stations due to small cell size, then the terminal maintains connection in the heterogeneous network, but unnecessary switching consumes additional resources and increases overhead
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple handover parameter sets with the network before the terminal needs to perform handovers. The terminal receives and stores both first parameters (for high-speed movement) and second parameters (for non-high-speed movement) in advance, so that when handover decisions are needed, the terminal can immediately select the appropriate pre-configured parameters without complex real-time calculations, thereby reducing processing complexity while maintaining reliable connection
Data Source
AI summary
A radio terminal UE according to one embodiment includes a radio communication unit 210 configured to receive a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for switching to a neighboring base station from a base station connected to the radio terminal, and a controller 260 configured to acquire movement speed information indicating a movement speed of the radio terminal and to select a parameter corresponding to the movement speed information. The first parameter is configured to inhibit processing for switching to a Pico base station PeNB which is included in the neighboring base stations.