IoT Cell Interference Detection and Device Location
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Solution Overview
Problem
The increasing load and interference in IoT cells of radio access networks due to defective IoT devices, which can cause unreliable node function and are difficult to detect and isolate, especially when they affect adjacent cells due to small frequency spacings.
Innovation Solution
A method that monitors multiple adjacent IoT cells to detect interference patterns, correlates node identifiers and timestamps to identify interfering devices, and uses triangulation to locate them, potentially aided by IMSI identification and noise power measurements to determine the precise position of the interfering device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of IoT devices in a cell is increased to accommodate more devices, then the coverage and service capacity are improved, but the interference and communication load on nodes increase
Solution Approach 1:
The patent segments the monitoring task by dividing the network into multiple cells, each monitored independently. By monitoring multiple adjacent cells separately and comparing their interference patterns, the system can identify whether interference is localized to one cell or affects multiple cells, thereby resolving the contradiction between accommodating more devices and managing interference through granular monitoring.
2Measurement precision
If monitoring of multiple adjacent cells is performed to identify interfering devices, then the precision of locating interfering devices is improved, but the complexity and resource consumption of the monitoring system increase
Solution Approach 1:
The monitoring system is segmented into multiple independent cell monitoring units, each handling one cell. This modular approach improves location precision by enabling cross-cell comparison while managing complexity through standardization and independence of each monitoring unit.
Solution Approach 2:
Instead of monitoring the entire network simultaneously, the system performs partial monitoring by focusing on multiple adjacent cells at a time. This selective approach improves location precision for interfering devices while reducing overall system complexity and resource consumption compared to full-network monitoring.
3Duration of action of stationary object
If defective IoT devices continue to up-link regularly due to incorrect power control implementation, then the battery lifetime is extended, but the interference and unreliable node function increase
Solution Approach 1:
The patent implements a feedback mechanism where the monitoring system detects interference patterns and identifies defective devices. By providing feedback information about device status and interference contribution, the system enables network operators to take corrective actions, thus resolving the contradiction between extended battery lifetime and maintained reliability.
Data Source
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AI summary
Method for monitoring an IoT (Internet of Things) cell of a radio access network, the method comprising the steps of monitoring an IoT node, the monitored IoT node servicing an IoT cell of a radio access network and having a known position, and detecting an interference of the IoT cell serviced by the monitored IoT node, and computer program product for monitoring an IoT cell of a radio access network.