Interference Manager for Narrowband Broadband Proximity
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Solution Overview
Problem
Signal interference between physically-proximate narrowband and broadband communication devices, particularly in hazardous environments, degrades communication quality and can have critical consequences for public safety personnel.
Innovation Solution
Implementing an interference manager in both broadband and narrowband communication devices to detect proximity and adjust transmission spectrum blocks, allowing them to coordinate and mitigate interference by switching or delaying transmissions when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If broadband and narrowband communication devices operate in close proximity using spectrally-proximate spectrum blocks, then communication coverage and functionality are improved, but signal interference degrades communication quality
Solution Approach 1:
The interference manager continuously monitors the communication environment for interference conditions and dynamically adjusts transmission parameters. When interference is detected between broadband and narrowband devices, the system feedbacks control signals to modify spectrum block usage, power levels, or transmission timing, thereby resolving the contradiction between maintaining communication coverage and eliminating harmful interference.
Solution Approach 2:
The system changes operational parameters such as spectrum block selection, transmission power, and timing characteristics based on detected interference conditions. By dynamically adjusting these parameters through the interference manager, the system maintains communication functionality while adapting to prevent or mitigate interference between spectrally-proximate devices operating in close proximity.
2Reliability
If broadband devices transmit using high power in spectrally-proximate blocks, then transmission reliability is improved, but interference with narrowband communications increases
Solution Approach 1:
The interference manager implements dynamic control of transmission parameters based on real-time detection of narrowband communication activity. When narrowband devices are detected in proximity, the broadband device dynamically adjusts its transmission power or spectrum block selection to reduce interference, while maintaining transmission reliability when interference conditions are absent. This dynamic adaptation resolves the contradiction between high-power transmission benefits and harmful interference generation.
Data Source
AI summary
A communication pathway (145) can be established between physically collocated narrowband (135) and broadband (105) devices. The narrowband device (135) can identify a communication channel. A transmission frequency used by the broadband device (105) can be spectrally-proximate to a reception frequency used by the narrowband device (135) in a frequency range associated with the communication channel, resulting in interference of the narrowband device's (135) reception when the broadband device (105) is transmitting and the narrowband device (135) is receiving concurrently. The narrowband device (135) can instruct the broadband device (105) to switch to a transmission spectrum block that is spectrally separated from the reception spectrum block of the communication channel to minimize interference between the devices when the narrowband device (135) handles a call assignment.