Mobile Relay Timing for Position-Grouped IoT Uplink Interference
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Solution Overview
Problem
Existing techniques for managing uplink signals in IoT terminals with a large number of devices result in high interference due to overlapping channels, leading to inefficient communication and reduced cost performance.
Innovation Solution
A wireless communication system utilizing a mobile relay apparatus that groups IoT terminals based on position information, determines transmission sets, and controls timing to minimize interference by ensuring terminals in the same group transmit at different times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional simultaneous timing control techniques are applied to manage uplink signals from multiple IoT terminals, then communication efficiency can be maintained in small-scale systems, but interference increases and cost performance deteriorates when the number of terminals becomes large
Solution Approach 1:
The patent segments the large number of IoT terminals into multiple groups based on their position information. Each group is assigned a specific time slot for uplink transmission to the relay apparatus. This segmentation prevents simultaneous transmissions from all terminals, thereby reducing interference while maintaining communication efficiency even when the total number of terminals is large.
2Quantity of substance
If the number of IoT terminals is increased to expand system capacity, then coverage and data collection capability improve, but the probability of channel overlap increases leading to interference
Solution Approach 1:
The patent implements periodic action by assigning different time slots to different groups of terminals. Each group transmits uplink signals at its designated periodic interval rather than simultaneously. This time-division approach allows the system to support a large quantity of terminals while preventing channel overlap and interference through structured periodic transmission patterns.
3Device complexity
If simple interference suppression methods are used to reduce complexity, then cost performance improves, but the ability to manage large numbers of terminals effectively is reduced
Solution Approach 1:
The patent applies preliminary action by pre-assigning groups and time slots to terminals based on their position information before uplink transmission begins. The relay apparatus determines the group assignment and transmission timing in advance, so terminals can transmit without complex real-time interference suppression. This preliminary organization maintains communication efficiency while keeping the interference suppression method simple and cost-effective.
Data Source
AI summary
A wireless communication system includes a plurality of communication apparatuses and a relay apparatus which is mobile, in which the relay apparatus includes a classification unit that groups the plurality of communication apparatuses by using position information of each of the plurality of communication apparatuses, a set determination unit that determines a set of communication apparatuses belonging to different groups that transmit and receive data within the same period, a transmission timing control unit that determines a transmission period for each determined set, and a plurality of antennas that receive data transmitted from the plurality of communication apparatuses in the determined transmission period for each determined set, and the plurality of communication apparatuses include a communication unit that transmits data to the relay apparatus within the transmission period for each set determined by the relay apparatus.