Mobile Relay Switching Using Distance and Relative Velocity
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Solution Overview
Problem
Mobile stations outside a communication-enabled area cannot communicate with a base station, and existing systems fail to efficiently manage the relay between mobile stations to maintain communication quality as they move.
Innovation Solution
A management method and apparatus that utilize position and velocity vectors to determine whether to maintain or switch relays between forwarding and forwarded mobile stations based on inter-mobile-station distances and relative velocity vectors, ensuring seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay combination is changed to maintain communication quality, then communication quality is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic relay selection by continuously monitoring position information and velocity vectors of mobile stations. The system automatically switches relay combinations based on real-time movement data, allowing the relay relationship to change dynamically rather than remaining static. This resolves the contradiction by enabling adaptive relay management that maintains communication quality without requiring complex manual intervention.
Solution Approach 2:
The patent employs feedback mechanisms by acquiring position information and velocity vectors from mobile stations, calculating inter-mobile-station distances and relative velocity vectors, and using these calculations to determine relay switching decisions. This closed-loop feedback system continuously optimizes relay selection based on actual station positions and movements, maintaining communication quality while automating the complexity management.
2Reliability
If relay switching is implemented to track moving stations, then communication continuity is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary calculations of inter-mobile-station distances and relative velocity vectors based on acquired position and velocity information. By pre-computing these parameters and storing them for comparison, the system can quickly determine relay switching decisions without time-consuming real-time calculations during the actual relay selection process, thus reducing processing time while maintaining communication continuity.
Solution Approach 2:
The patent changes the parameters used for relay determination from static distance measurements to dynamic calculations incorporating velocity vectors. By using relative velocity vectors and predicted position changes, the system can make faster relay switching decisions based on movement trends rather than requiring continuous complex position tracking, reducing the time needed for relay determination while ensuring communication continuity.
Data Source
AI summary
A derivation unit derives a first inter-mobile-station distance, derives a first relative velocity vector, derives a second inter-mobile-station distance, and derives a second relative velocity vector. A determination unit determines whether to maintain a relay between the base station and the forwarded mobile station by the first forwarding mobile station or to switch the relay to the second forwarding mobile station, based on the first inter-mobile-station distance, the first relative velocity vector, the second inter-mobile-station distance, and the second relative velocity vector.