Microwave Sensing Packets for Unlicensed-Band Collision Avoidance
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Solution Overview
Problem
Microwave sensing devices operating in unlicensed bands face transmission collisions due to low signal frequency and short duration, leading to inefficient utilization of the band and interference with other communication devices.
Innovation Solution
A microwave sensing device and method that generates, transmits, and processes microwave sensing packets according to wireless communication protocols, using a wrapper and single tone signal to avoid collisions by detecting channel availability and identifying interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microwave sensing device transmits signals with low frequency and short duration to avoid detection, then the device can operate covertly, but the utilization rate of the unlicensed band decreases
Solution Approach 1:
The patent implements dynamic transmission parameters including variable frequency selection from multiple candidate frequencies, adjustable signal duration, and adaptive power control. The device dynamically adjusts transmission characteristics based on channel conditions and detection requirements, allowing optimization between covert operation and band utilization efficiency
Solution Approach 2:
The patent changes multiple transmission parameters including frequency (selecting from multiple candidate frequencies), duration (adjustable signal length), and power (adaptive power control) to resolve the contradiction. By varying these parameters, the system can maintain covert operation while improving overall band utilization through more efficient spectrum usage
2Adaptability or versatility
If the microwave sensing device operates in the unlicensed band, then the device can access available spectrum resources, but transmission collision with communication devices occurs
Solution Approach 1:
The patent implements clear channel assessment (CCA) and listen-before-talk (LBT) mechanisms that detect channel occupancy before transmission. The device performs preliminary detection of communication signals and identifies idle time slots, allowing microwave sensing transmissions to occur only when the channel is confirmed available, thus avoiding collisions while maintaining spectrum access
Solution Approach 2:
The patent uses channel detection feedback to adapt transmission timing and frequency selection. By continuously monitoring the channel for communication signals and feedback about channel occupancy, the device adjusts its transmission strategy to avoid collisions while maintaining access to unlicensed band resources
Data Source
AI summary
A microwave sensing device includes: a generation circuit, for generating a microwave sensing packet according to a wireless communication protocol; a detecting circuit, for detecting whether a channel is idle; a transmitting circuit, coupled to the generation circuit and the detecting circuit, for transmitting the microwave sensing packet in response to the channel being idle; a receiving circuit, coupled to the detecting circuit, for receiving a received microwave sensing packet corresponding to the microwave sensing packet; and a processing circuit, coupled to the receiving circuit, for determining whether the received microwave sensing packet comprises an interference.