Mobile Relay Channel Switching for Low-Interference IoT Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication between IoT terminals and low-earth-orbit satellites is hindered by increased overlap of frequency bands and interference from other devices, leading to inefficient communication.
Innovation Solution
A mobile relay device transmits channel change signals to IoT terminals, indicating channels with lower interference levels for communication, allowing IoT terminals to switch to less interfered channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of IoT terminals communicating with the low-earth-orbit satellite is increased, then the coverage and utility of the communication system is improved, but the probability of channel overlap and interference increases
Solution Approach 1:
The patent implements dynamic channel allocation where the relay device continuously monitors interference levels on different channels and dynamically assigns channels to IoT terminals based on real-time conditions. This allows the system to adapt to changing interference patterns as more terminals are added, preventing channel overlap by actively managing channel assignments rather than using static allocation.
Solution Approach 2:
The relay device employs feedback mechanisms by monitoring interference levels on communication channels and using this information to make informed channel assignment decisions. The system collects feedback about channel quality and uses it to dynamically adjust channel allocations, ensuring that terminals are assigned to channels with acceptable interference levels even as the number of terminals increases.
2Adaptability or versatility
If the frequency band is shared with other devices, then spectrum utilization is improved, but interference from other devices increases
Solution Approach 1:
The relay device acts as an intermediary between IoT terminals and the shared frequency band. It monitors interference from other devices in the spectrum and mediates channel assignments to terminals, selecting channels that minimize exposure to external interference while maintaining efficient spectrum utilization. This intermediary function allows the system to share the frequency band effectively without being directly exposed to interference from other devices.
3Device complexity
If a simple random access system is used for LPWA, then device complexity and cost are reduced, but communication efficiency deteriorates under high interference
Solution Approach 1:
The system implements self-service through automatic channel monitoring and dynamic assignment performed by the relay device. The relay device autonomously monitors interference levels and assigns optimal channels to terminals without requiring complex terminal-side decision-making. This maintains simplicity at the terminal level while achieving efficient communication through the relay's intelligent channel management.
Data Source
AI summary
A wireless communication system includes one or more communications apparatuses, and a relay device, which is mobile, wherein the relay device includes a transmission unit adapted to transmit a channel change signal to the one or more communications apparatuses, the channel change signal containing channel information that indicates results corresponding to interference levels of a plurality of channels in a frequency band available for use in uplink transmission from the one or more communications apparatuses to the relay device and specifying information used to specify a communications apparatus subject to channel change, and the one or more communications apparatuses include a channel set unit adapted to set a channel having an interference level lower than a threshold as a channel to be used for communications with the relay device when the specifying information contained in the channel change signal is applicable.