Cellular UAV Flight Management for Range and Tracking Reliability
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Solution Overview
Problem
Current UAV flight control systems face challenges in maintaining reliable communication and tracking due to limited range and interference with civilian and military air traffic, as well as ground objects, primarily because of the weight and radar detection limitations of UAVs, which can lead to collision hazards.
Innovation Solution
The implementation of 4G cellular infrastructure for UAV communication, utilizing compatible modems and antennae to establish a reliable data link, enabling efficient uplink and downlink data transmission, and employing a flight data collection and distribution server to manage flight paths and prevent collisions, while using multiple SIM cards and virtual mobile networks for robust communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special wireless links are used for UAV control, then communication reliability is improved, but communication range is limited and requires line of sight
Solution Approach 1:
The patent introduces ground stations as intermediary nodes that relay communication between UAVs and control centers. Multiple ground stations are distributed across the service area, each providing local coverage. When a UAV moves beyond the range of one ground station, the system automatically hands over control to another ground station, thereby extending the overall communication range while maintaining reliability through the intermediary ground station infrastructure.
2Weight of moving object
If UAV weight is reduced below 25 kgs, then maneuverability and efficiency are improved, but radar detection capability deteriorates and tracking becomes difficult
Solution Approach 1:
The patent implements a feedback-based tracking system where ground stations continuously monitor UAV positions and report to a central control system. The control center processes this data and provides feedback commands to guide UAVs back to authorized flight paths if they deviate. This active monitoring and feedback mechanism compensates for the reduced radar detectability of lightweight UAVs, enabling effective tracking and collision prevention despite their small size and low radar cross-section.
3Length of stationary object
If multiple ground stations are deployed for extended coverage, then communication range is improved, but system complexity increases
Solution Approach 1:
The patent designs ground stations with multi-functionality to reduce overall system complexity. Each ground station is equipped to perform multiple functions including local UAV control, data collection, communication relay, and coordination with other ground stations. The standardized ground station design allows them to operate independently or in coordination, providing universal functionality across the entire service area. This multi-functional approach reduces the need for specialized equipment at each location and simplifies the overall system architecture.
Data Source
AI summary
A flight management system for unmanned aerial vehicles (UAVS), in which the UAV is equipped for cellular fourth generation (4G) flight control. The UAV caches on-board a 4G modem, an antenna connected to the modern for providing for downlink wireless RF. A computer is connected to the modem. A 4G infrastructure to support sending via uplink and receiving via downlink from and to the UAV. The infrastructure further includes 4G base stations capable of communicating with the UAV along its flight path. An antenna in the base station is capable of supporting a downlink to the UAV. A control centre accepts navigation related data from the uplink. In addition, the control centre further includes a connection to the 4G Infrastructure for obtaining downlinked data. A computer for calculating location of the UAV using navigation data from the downlink.