IoT Terminal Band Selection via Relay Interference Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems involving IoT terminals and low earth orbit satellites, existing methods struggle to prevent radio wave interference due to the inability of control signals like RTS/CTS to reach all IoT terminals, making it difficult to manage interference effectively.
Innovation Solution
A wireless communication system that includes a first communication device and one or more second communication devices around it, with a relay device that moves, where the second communication devices measure radio wave reception strength and transmit this information to the first device, allowing it to determine and use an optimal band for data transmission to the relay device, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control signals such as RTS/CTS are used to manage data transmission timing, then radio wave interference can be prevented in traditional wireless networks, but this method cannot be applied in satellite-IoT terminal communication because control signals cannot reach all IoT terminals
Solution Approach 1:
The patent introduces a relay device (satellite) as an intermediary to manage communication between IoT terminals. Instead of direct terminal-to-terminal control signals, the relay device coordinates transmission by receiving signals from one terminal and forwarding to another, enabling interference management in satellite-based networks where direct control signal propagation is not feasible
Solution Approach 2:
The patent implements a feedback mechanism where the relay device monitors transmission requests from IoT terminals and provides clear-to-send responses. This feedback loop allows the relay device to control transmission timing and prevent interference by only allowing terminals to transmit when the relay device confirms the channel is clear
2Productivity
If multiple IoT terminals transmit data simultaneously to increase productivity, then data collection efficiency improves, but radio wave interference occurs between terminals outside signal coverage that cannot mutually recognize each other
Solution Approach 1:
The patent implements periodic transmission opportunities where IoT terminals transmit data at scheduled intervals coordinated by the relay device. This periodic action allows multiple terminals to transmit efficiently while the relay device manages timing to prevent interference, converting simultaneous transmission into controlled sequential access
Solution Approach 2:
The patent uses a preliminary request-to-send mechanism where IoT terminals must first request transmission permission before actually transmitting data. This preliminary action allows the relay device to assess channel conditions and grant transmission rights in a way that prevents interference while maintaining high productivity
Data Source
AI summary
In a wireless communication system including a first communication device, one or more second communication devices disposed around the first communication device, and a relay device that moves, the second communication device includes a second reception unit that attempts to receive a radio wave in a predetermined band and measures reception strength, and a second transmission unit that transmits, to the first communication device, reception result information indicating a peripheral radio wave condition based on the reception strength measured by the second reception unit, and the first communication device includes a first reception unit that attempts to receive a radio wave in the predetermined band and measures reception strength, a determination unit that determines a band to be used for transmission of data to the relay device on a basis of a peripheral radio wave condition based on the reception strength measured by the first reception unit and the peripheral radio wave condition based on the reception result information transmitted from the second transmission unit, and a first transmission unit that transmits the data to the relay device using the band determined by the determination unit.