Distributed Antenna Array for High-Speed Vehicle Mobility
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Solution Overview
Problem
Next-generation wireless communication systems face challenges in providing high-quality mobility management for high-speed vehicles, as conventional methods are inadequate for ensuring reliable data rates and quality of service, especially when large antenna arrays are aesthetically and aerodynamically unsuitable for vehicle installation.
Innovation Solution
A distributed antenna array system is implemented within vehicles, utilizing multiple antennas with diverse emission patterns and a central control unit to maximize reception diversity and prevent communication failures due to ray-blocking, along with a new cell selection method that considers ray distribution and angle of arrival information for efficient link stability and handover management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large antenna array is provided outside the vehicle to provide high quality communication service to high speed vehicles, then communication quality is improved, but aesthetic and aerodynamic problems are generated
Solution Approach 1:
The patent divides the large antenna array into multiple distributed antenna elements positioned at different locations within the vehicle (roof, trunk, hood, etc.). Each antenna element operates independently or in coordinated fashion, providing the benefits of a large array while avoiding the aesthetic and aerodynamic issues of a single large external antenna.
Solution Approach 2:
The distributed antenna elements are integrated into the existing vehicle structure and body panels. The antennas are nested within or mounted on the vehicle's aerodynamic surfaces, allowing the communication system to be embedded without disrupting the vehicle's external form or airflow characteristics.
2Device complexity
If conventional cell selection method based on signal strength threshold is used for high speed vehicles, then mobility management is simplified, but link failures occur due to ray-blocking during high-speed movement
Solution Approach 1:
The system performs preliminary measurements of signal strength, angle of arrival, and ray distribution characteristics before handover decisions are made. By anticipating potential link failures due to ray-blocking and preparing alternative cell candidates in advance, the system maintains continuous connectivity during high-speed movement without complex real-time adjustments.
Solution Approach 2:
The system continuously monitors signal characteristics including angle of arrival and ray distribution from multiple distributed antenna elements. This feedback information is used to dynamically adjust cell selection and handover decisions, preventing link failures by detecting early signs of ray-blocking and switching to alternative cells before complete signal loss occurs.
3Reliability
If distributed antenna array with multiple elements is implemented within the vehicle, then reception diversity is maximized and link failures are prevented, but device complexity increases
Solution Approach 1:
The patent combines the functions of multiple distributed antenna elements with the vehicle's existing communication infrastructure and control systems. The antenna elements share common signal processing, control, and power management resources, reducing overall system complexity while maintaining the diversity benefits of multiple antennas.
Solution Approach 2:
The distributed antenna system implements self-configuration and self-optimization capabilities. Each antenna element automatically determines its optimal operation mode based on local signal conditions, and the system autonomously performs beamforming and signal combining without requiring complex external control, reducing the burden on the vehicle's communication system.
Data Source
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AI summary
The present invention relates to a method for efficiently supporting communication for vehicles in a next-generation wireless communication system and a device for the same. To this end, a user equipment (UE) receives signals from a network through a plurality of antenna units which are located in dispersed locations of the UE, determines, through a central unit thereof, whether a mobility related event of the UE has occurred through the signals received through the plurality of antenna units and transmits an event occurrence report to the network when the mobility related event of the UE has occurred, wherein whether the mobility related event of the UE has occurred is determined in consideration of receive (Rx) power of the signals received through the plurality of antenna units and a ray distribution between the network and the UE.