Monitoring Device for Cognitive Radio Interference Mitigation
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Solution Overview
Problem
Cognitive radios often unintentionally interfere with incumbent devices, despite efforts to avoid occupied frequencies, leading to potential damage and signal degradation, highlighting a need for effective interference mitigation in shared radio spectrum environments.
Innovation Solution
A monitoring device equipped with a transceiver and processor detects interference caused by cognitive radios and reports it to a database or base station, which updates access policies to manage the operation of cognitive devices, ensuring they do not interfere with incumbent devices by adjusting transmission parameters or ceasing operations on specific frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cognitive radios operate in shared spectrum to increase spectrum utilization, then spectrum efficiency is improved, but interference with incumbent devices occurs
Solution Approach 1:
A monitoring device is introduced as an intermediary between cognitive radios and incumbent devices. The monitoring device detects interference conditions and generates hold requests to a database, which then directs cognitive radios to adjust their operations. This intermediary mechanism enables spectrum sharing while protecting incumbent devices from harmful interference.
Solution Approach 2:
The system implements a feedback loop where the monitoring device continuously monitors the radio frequency spectrum for incumbent signals, detects when cognitive radios cause interference, and sends hold requests to the database. The database then provides directed messages to cognitive radios to adjust their transmit operations, creating a closed-loop feedback system that dynamically manages interference.
2Reliability
If cognitive radios monitor and avoid occupied frequencies to protect incumbent devices, then incumbent device protection is improved, but spectrum utilization decreases
Solution Approach 1:
The monitoring device proactively monitors the radio frequency spectrum before cognitive radios transmit, detecting incumbent signals in advance. When incumbent devices are detected, the system generates hold requests before interference occurs, preventing rather than merely responding to interference events. This preliminary action allows cognitive radios to utilize spectrum whenever possible while ensuring incumbent protection.
Data Source
AI summary
A monitoring device (141) can include a transceiver (202) to receive a radio signal, and a controller (203) communicatively coupled to the transceiver to detect an infringement on the radio signal and report the infringement to a database. One or more policies within the database can be updated to mitigate the infringement. The monitoring device can also detect whether a cognitive radio (111) is generating interference on a primary spectrum used by an incumbent device (151). Other embodiments are disclosed.