Moving Relay Waveform Data Control for Band Congestion
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Solution Overview
Problem
The communication band from a relay apparatus mounted on a low earth orbit satellite to a base station can become congested due to the large data amount of waveform data being transmitted, especially when receiving data from IoT terminals in various locations such as buoys or mountainous areas.
Innovation Solution
A wireless communication system that includes a moving relay apparatus with a first signal receiver to acquire waveform data from a first communication apparatus, a second signal transmitter to transmit this data to a second communication apparatus, and a transmission data controller to manage the data amount based on communication quality, reducing the number of reception antennas or quantization bits when communication quality is good.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If waveform data from all reception antennas is transmitted to the base station, then signal recovery accuracy is improved, but communication band congestion occurs due to enormous data amount
Solution Approach 1:
The patent applies local quality by making different reception antennas have different data transmission priorities based on their individual signal qualities. Antennas with high signal quality (low correlation with other antennas) transmit their waveform data, while antennas with low signal quality (high correlation) do not transmit. This selective approach ensures that only valuable local signal information is transmitted, maintaining recovery accuracy while reducing overall data amount.
Solution Approach 2:
The patent changes the parameter of data transmission volume based on signal quality metrics. By calculating correlation values between received signals from different antennas and determining which antennas provide unique information, the system dynamically adjusts which antenna data is transmitted. This parameter-based selection resolves the contradiction by transmitting only necessary data portions.
2Reliability
If waveform data is transmitted for all reception antennas, then complete signal information is provided to the base station, but power consumption increases due to large data transmission volume
Solution Approach 1:
The patent evaluates each reception antenna's local signal quality through correlation calculation and selectively transmits only from antennas that provide unique information. This approach maintains signal information completeness by ensuring that transmitted data contains sufficient diversity for accurate recovery, while significantly reducing power consumption by avoiding transmission of redundant data from correlated antennas.
Solution Approach 2:
The patent applies partial action by transmitting waveform data from only a subset of reception antennas rather than all antennas. By selecting the minimum necessary number of antennas that provide sufficient signal diversity for accurate recovery, the system achieves complete enough signal information while minimizing energy expenditure on data transmission.
3Quantity of substance
If data amount of waveform data is reduced, then communication band congestion is alleviated, but signal recovery accuracy at the base station may deteriorate
Solution Approach 1:
The patent changes the transmission parameter from transmitting all antenna data to selectively transmitting only from antennas with low correlation values (high signal quality). This parameter-based selection ensures that the reduced data set still contains sufficient information for accurate signal recovery, as the selected antennas provide unique and valuable signal characteristics.
Solution Approach 2:
The patent introduces correlation calculation as an intermediary mechanism to evaluate and select which antenna data to transmit. This intermediary assessment ensures that only antennas providing unique information are selected, maintaining signal recovery accuracy while reducing data amount. The correlation metric acts as a gatekeeper that preserves quality while enabling reduction.
Data Source
AI summary
A moving relay apparatus includes a first signal receiver, a second signal transmitter, and a transmission data controller. The first signal receiver receives a wireless first signal transmitted by the first communication apparatus by a reception antenna, and acquires waveform data of the first signal received by the reception antenna. A second signal transmitter transmits the waveform data acquired by the first signal receiver to the second communication apparatus by a second signal. A transmission data controller controls a data amount of the waveform data generated by the first signal receiver on the basis of information regarding communication quality between the relay apparatus and the first communication apparatus at a relay apparatus position where the first signal has been received.