Radio Device Transmission Power Control for UAV Co-Channel Interference
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Solution Overview
Problem
Current wireless communication networks face challenges in managing co-channel interference, particularly when unmanned aerial vehicles (UAVs) are involved, as their transmissions can propagate freely and cause interference even to base stations far away, leading to reduced network capacity due to high co-channel interference levels, especially when UAVs have more uplink traffic than downlink traffic.
Innovation Solution
Implementing a method where a radio access device in a communications network adjusts the transmission power of another radio device based on whether the communication link is for sky or ground communications, using power control parameters specific to each type, to mitigate co-channel interference by optimizing antenna noise temperature and signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UAVs transmit with high power to ensure communication quality, then uplink communication reliability is improved, but co-channel interference to other base stations increases
Solution Approach 1:
The patent applies local quality by differentiating transmission power control based on the type of communicating device. Ground devices use one power control mechanism while UAV devices use another, tailored mechanism. This allows each device type to transmit with appropriate power levels for its specific communication characteristics, ensuring reliable uplink communication for UAVs while preventing excessive interference to distant base stations.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting transmission power based on device type, location, and communication conditions. The network device determines whether a device is a ground device or UAV, and applies different power control parameters accordingly. This enables the system to optimize communication reliability for UAVs while controlling co-channel interference through adaptive power parameter modification.
2Productivity
If base station antennas use down tilt to reduce co-channel interference, then network capacity is improved, but antenna noise temperature increases for horizon-pointing antennas
Solution Approach 1:
The patent applies local quality by implementing different power control strategies for different device types and locations. Instead of uniformly increasing power for all devices (which would raise noise temperature), the system tailors power adjustments to specific scenarios: ground devices, UAVs, and devices in different geographic locations receive customized power control parameters, thereby maintaining network capacity while managing noise temperature locally.
Solution Approach 2:
The patent implements dynamics by making transmission power control adaptive and location-aware. The network device determines the geographic location of each communicating device and adjusts power parameters dynamically based on whether the device is a ground device or UAV, and its specific location characteristics. This dynamic adjustment allows the system to maintain network capacity while adapting to varying noise temperature conditions.
Data Source
AI summary
There is provided co-channel interference mitigation by power adjustments that take into account sensitivity improvement provided by the sky communications. In connection with a communications network configured for ground communications and sky communications one radio device performs transmission power control of another radio device. If at the controlling radio device, a radio link is determined to be sky communications, at least one power adjustment for controlling the transmission power of the other radio device is determined in accordance with one or more power control parameters for sky communications. The transmission power of the second radio device is controlled by the first radio device, on the basis of the determined at least one power adjustment. In this way co-channel interference mitigation is supported by power adjustments that take into account sensitivity improvement provided by the sky communications.