LEO Satellite Data Relay via GEO Intermediaries
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Solution Overview
Problem
In wireless communication systems, LEO satellites face delays in transmitting data to earth stations due to insufficient feeder link networks, causing accumulation of data and increased transmission times when direct communication is not possible.
Innovation Solution
A wireless communication system that includes multiple moving communication apparatuses, such as LEO and GEO satellites, and reception apparatuses, where data is transmitted through a network of communication units and control units that relay data between satellites when direct communication with an earth station is not possible, utilizing GEO satellites as an alternative feeder link when LEO satellites cannot communicate with ground stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LEO satellites use autonomous distributed control for LPWA communication, then communication coverage is extended to remote areas, but data transmission time increases when feeder link is unavailable
Solution Approach 1:
The patent introduces GEO satellites as intermediary relay nodes in the communication network. When LEO satellites cannot directly communicate with earth stations due to feeder link unavailability, they can relay data through GEO satellites to reach the destination, thus reducing transmission time while maintaining coverage in remote areas
2Reliability
If LEO satellites accumulate data when direct communication is not possible, then data can be transmitted when feeder link is available, but transmission delay increases
Solution Approach 1:
By introducing GEO satellites as alternative relay paths, the system can transmit data promptly without waiting for feeder link availability. The GEO satellites act as intermediaries that accept and forward data from LEO satellites, eliminating the need to accumulate data and reducing transmission delay while maintaining reliable delivery
3Productivity
If multiple communication apparatuses are deployed to improve network capacity, then data relay capability is enhanced, but system complexity increases
Solution Approach 1:
The patent implements multi-functionality in the communication apparatuses, where each apparatus can perform both direct communication with earth stations and relay communication through other satellites. This universal capability allows the system to enhance network capacity through data relay while managing complexity by having each node serve multiple purposes rather than requiring separate dedicated relay infrastructure
Data Source
AI summary
A wireless communication system includes a first communication apparatus that moves, a second communication apparatus that moves, and a reception apparatus. A first control unit of the first communication apparatus, when an own apparatus can communicate with any of the reception apparatuses, transmits transmission data acquired by the own apparatus from a first communication unit to the reception apparatus, and, when the own apparatus cannot communicate with any of the reception apparatuses, transmits the transmission data from a second communication unit to the second communication apparatus capable of communicating with the own apparatus. A second control unit of the second communication apparatus transmits the transmission data received by a third communication unit from the first communication apparatus from a fourth communication unit to a reception apparatus capable of communicating with the own apparatus.