Moving Wireless Antenna Selection Using Predicted Channel Quality
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Solution Overview
Problem
In wireless communication systems where the communication apparatus is mounted on a moving body, such as a satellite, changes in channel state information (CSI) due to movement lead to increased load and decreased communication efficiency, and periodicity in channel capacity causes communication quality to deteriorate.
Innovation Solution
A wireless communication system and method that adjusts antenna selection based on calculated communication quality and movement schedule information to maximize communication quality, reducing the need for CSI feedback and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI is estimated and acquired with high frequency to maintain optimal transmission capacity for moving wireless communication apparatus, then communication quality is improved, but device load increases and communication efficiency decreases
Solution Approach 1:
The patent pre-calculates communication quality for each antenna combination based on position information and movement schedule before actual communication occurs. This preliminary calculation allows the system to anticipate optimal antenna selections without requiring frequent real-time CSI measurements, thereby reducing device load while maintaining communication quality.
Solution Approach 2:
The system uses its own position information and movement schedule to self-determine optimal antenna combinations without external feedback. By leveraging internally available data (position and movement schedule) rather than requiring external CSI feedback, the system reduces communication overhead and device load while maintaining reliable communication.
2Productivity
If CSI feedback is implemented frequently to track channel changes for moving apparatus, then transmission capacity optimization is improved, but communication efficiency decreases
Solution Approach 1:
The patent performs preliminary calculation of communication quality for all antenna combinations using position information and movement schedule data before communication begins. This advance preparation eliminates the need for frequent real-time CSI feedback loops, reducing time loss while maintaining optimal transmission capacity selection.
3Reliability
If antenna selection is adjusted frequently to maximize communication quality for moving apparatus, then communication quality is improved, but system load increases
Solution Approach 1:
The patent calculates communication quality for each antenna combination in advance using position information and movement schedule, storing these results for later use. This preliminary calculation approach allows the moving wireless communication apparatus to switch between pre-evaluated antenna selections without performing energy-intensive real-time calculations, thereby maintaining communication quality while reducing system load.
Data Source
AI summary
First wireless communication apparatus wirelessly communicates with second wireless communication apparatus using one or more first antennas. Second wireless communication apparatus wirelessly communicates with the first wireless communication apparatus using one or more second antennas. A controller included in the wireless communication system performs control to change one or both of first antennas wirelessly communicating with the second wireless communication apparatus among the one or more first antennas of a plurality of first wireless communication apparatuses or second antennas wirelessly communicating with the first wireless communication apparatus among a plurality of second antennas of the second wireless communication apparatus for maximizing communication quality on the basis of the communication quality for each time between first antenna and second antenna calculated using a position of the one or more second antennas and movement schedule information representing a position of first wireless communication apparatus for each time.