High-Speed Vehicle Wireless Handover via Preliminary Signal Monitoring
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Solution Overview
Problem
High-speed vehicles face challenges in maintaining continuous wireless communication due to the difficulty of covering wide areas with high-frequency bands, leading to the need for closely spaced base stations, which increases costs and reduces service availability.
Innovation Solution
A method where user equipment (UE) monitors signal strength and transitions between base stations, maintaining a connection with a legacy base station while establishing communication with a new base station using beamforming and precoding, allowing for efficient handover and reduced base station density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If base stations are closely spaced to cover wide areas with high-frequency bands, then communication coverage is improved, but installation cost increases
Solution Approach 1:
The system performs preliminary actions by having the UE measure and report signal strength from neighboring base stations before handover is needed. The source base station proactively identifies suitable target base stations and prepares handover parameters in advance, enabling seamless transition without requiring dense base station deployment.
Solution Approach 2:
The UE acts as an intermediary by measuring signal strength from both source and target base stations and reporting to the source base station. This intermediary measurement mechanism enables intelligent handover decisions that reduce the need for closely spaced base stations while maintaining coverage.
2Reliability
If base stations are closely spaced to ensure continuous coverage for high-speed vehicles, then service availability is improved, but the number of base stations increases
Solution Approach 1:
The system performs preliminary measurements and evaluations before handover is triggered. The UE continuously measures signal strength from neighboring base stations and reports to the source base station, which prepares handover parameters in advance. This preliminary action ensures seamless service continuity without requiring excessive base station density.
Solution Approach 2:
The system implements feedback mechanisms where the UE reports measured signal strength from target base stations back to the source base station. This feedback enables intelligent handover decisions that maintain service availability for high-speed vehicles while reducing the total number of base stations needed.
3Speed
If handover is performed quickly for high-speed vehicles, then communication continuity is improved, but measurement and decision time is reduced
Solution Approach 1:
The system performs preliminary measurements continuously even before handover conditions are met. The UE measures signal strength from neighboring base stations in advance and reports to the source base station, which prepares handover parameters proactively. This preliminary action enables rapid handover execution without sacrificing measurement quality, even for high-speed vehicles.
Data Source
AI summary
In the present application, disclosed is a method for a user equipment, that is moving at high speed from a first base station to a second base station, to transmit and receive signals in a wireless communication system. Specifically, the method comprises the steps of: when a measurement value from the first base station is less than or equal to a first threshold value, monitoring a transmission of a first signal from the second base station; when the transmission of the first signal is detected, transmitting a response signal to the first signal to the second base station; and receiving a second signal from the second base station that has received the response signal.