Double-unmanned-aerial-vehicle 3D trajectory design method for maritime safety communication

A dual-drone, maritime security technology, applied in location-based services, large-scale transport vehicles, safety devices, etc., can solve problems such as blocking communication, drone information transmission eavesdropping, etc., to improve The effect of system security performance

Pending Publication Date: 2022-07-15
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the open spectrum of the radio network, drone information transmission is vulnerable to potential eavesdroppers eavesdropping, or even blocking communication
However, traditional key encryption technology has serious challenges in key distribution and management.

Method used

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  • Double-unmanned-aerial-vehicle 3D trajectory design method for maritime safety communication
  • Double-unmanned-aerial-vehicle 3D trajectory design method for maritime safety communication
  • Double-unmanned-aerial-vehicle 3D trajectory design method for maritime safety communication

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] see figure 1 , UAVs S and J have the functions of information transmission and energy collection. Due to the small size of UAV S and UAV J and insufficient airborne energy, it is necessary to collect energy from the radio frequency signal sent by ship D and store it up to the threshold of its energy collection to meet the information transmission requirements of UAVs. In addition, the drone S transmits information to the ship D. Due to the openness of the RF signal, multiple potential eavesdroppers will eavesdrop on the messages of UAV S, and at the same time, UAV J sends artificial noise to interfere with eavesdropping. The invention jointly optimizes the 3D trajectory and the time slot allocation strategy of the UAV S and the UAV J to maximize the system security rate. It is verified by the simulation in the figure below that this implementation scheme can effectively improve the security performance of the communication system.

Embodiment 2

[0098] see figure 2 .Assume the total time of communication transmission is T, which is equally spaced by d t divided into N time slots. The slot switching coefficient α[n] represents the time allocation strategy for energy collection and transmission of information, where α={0, 1}. When α[n]=0, the nth time slot of the UAV is used for energy collection; when α[n]=1, the nth time slot of the UAV is used for information transmission. In particular, the UAV collects energy until its energy harvesting threshold is met.

Embodiment 3

[0100] see image 3 , since the problem is a complex integer non-convex problem, existing algorithms are difficult to solve. This algorithm resolves the problem into three sub-problems and handles the three sub-problems separately.

[0101] For problem 1: given the trajectory of the drone S {x s [n],y s [n], h s [n]} and the trajectory of UAV J {x j [n],y j [n], h j [n]}, optimize the time slot switching coefficient α[n]. In the present invention, the integer α[n] is first continuous, that is, α[n]∈[0,1], then the geometric method is used to approximate the worst position of eavesdropping, and then the linear problem is solved by the simplicity method, and finally the binary value is used. The discriminant method obtains the optimal time slot allocation strategy α[n].

[0102] For problem 2: given the trajectory of drone J {x j [n],y j [n], h j [n]} and time slot switching coefficient α[n] to optimize the trajectory of UAV S {x s [n],y s [n], h s [n]}. The prese...

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Abstract

The invention discloses a double-unmanned aerial vehicle 3D trajectory design method for maritime safety communication, which takes unmanned aerial vehicle sea area safety communication as a research background, and introduces wireless energy transmission based on time distribution. More practically, the method adds the requirement that the flight of the unmanned aerial vehicle generates the highest horizontal and vertical error; in addition, the invention provides a scene and a mathematical model of 3D dual-unmanned aerial vehicle sea area safety communication, and under the constraints of a plurality of potential unfixed eavesdropping positions, limited unmanned aerial vehicle energy, unmanned aerial vehicle flight maximum speed, unmanned aerial vehicle anti-collision minimum distance and positioning error, the unmanned aerial vehicle safety communication is realized. And flight paths and information energy transmission time distribution coefficients of the unmanned aerial vehicle S and the unmanned aerial vehicle J in the 3D space are planned in a combined manner, and sea area unmanned aerial vehicle-mobile ship secret communication is realized.

Description

technical field [0001] The invention relates to the technical field of maritime communication, in particular to a 3D trajectory design method for dual unmanned aerial vehicles for maritime safety communication. Background technique [0002] With the rapid development of my country's marine industry, the problem of broadband communication in sea areas has become the core problem to be solved urgently. At present, the maritime communication system is dominated by satellite communication and mobile communication. However, satellite communication has large transmission delay and high cost, and most of them can only provide narrowband communication. The coverage of mobile communication is small and cannot meet the requirements of far-sea operations. Compared with satellite communication and traditional mobile communication, because of its low cost, small size and easy deployment, UAVs can greatly increase the line-of-sight transmission range of aerial base stations to meet the ...

Claims

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Application Information

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IPC IPC(8): H04W4/029H04W4/42H04W12/02H02J50/20
CPCH04W4/029H04W4/42H04W12/02H02J50/20
Inventor 王伟李鑫睿刘锦涛吴磊季增栓姜浩宇苏鑫
Owner NANTONG UNIVERSITY
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