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Trajectory optimization and resource allocation method of unmanned aerial vehicle multi-hop relay communication system

A communication system and trajectory optimization technology, applied in the field of unmanned aerial vehicle communication, can solve the problem of no communication bandwidth optimization processing, etc.

Active Publication Date: 2019-10-25
GUANGDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

Among the existing patents, the patent No. "201810769377.1" named "a wireless communication method, device, equipment and readable storage medium" optimizes the flight trajectory and transmission power of the UAV relay. Communication bandwidth is not optimized

Method used

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  • Trajectory optimization and resource allocation method of unmanned aerial vehicle multi-hop relay communication system
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  • Trajectory optimization and resource allocation method of unmanned aerial vehicle multi-hop relay communication system

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Embodiment 1

[0142] Provide a kind of trajectory optimization and resource allocation method of unmanned aerial vehicle multi-hop relay communication system; image 3 As shown, the method includes the following steps:

[0143] S1: Modeling the trajectory optimization and resource allocation problems based on the UAV multi-hop relay communication system.

[0144] Suppose there are M UAVs as multi-hop relays to assist communication, denoted as a set Such as figure 1 shown. Assuming that the flying height H of the UAV is constant and the flight time is T, divide T into N time slots, and the length of each time slot is a sufficiently small δ t . Therefore, the position of the UAV can be regarded as invariable in each time slot, and the mth UAV relay trajectory is expressed as a sequence q m (t)=[x m (t),y m (t)] T , assuming the source location is The location of the destination is where w s =[0,0],w d =[L,0]. The maximum speed of flight is v max , then V=v max δ t , indicat...

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Abstract

The invention relates to a trajectory optimization and resource allocation method of an unmanned aerial vehicle multi-hop relay communication system. The method comprises the following steps: S1, modeling a trajectory optimization and resource allocation problem based on the unmanned aerial vehicle multi-hop relay communication system; S2, calculating the maximum system throughput by allocating power and bandwidth under the condition of giving an unmanned aerial vehicle trajectory; S3, under the condition of given unmanned aerial vehicle power and bandwidth allocation, optimizing the trajectory by using continuous convex programming; and S4, maximizing the throughput of the system by adopting a joint optimization unmanned aerial vehicle trajectory and source / unmanned aerial vehicle transmitting power and bandwidth allocation alternating optimization algorithm. According to the method, the multiple unmanned aerial vehicles are used as the multi-hop relay to assist the communication, thethroughput of the system is maximized by jointly optimizing flight paths, bandwidths and power of the multiple unmanned aerial vehicles, and the throughput of the system can be improved.

Description

technical field [0001] The present invention relates to the field of unmanned aerial vehicle communication, and more specifically, relates to a trajectory optimization and resource allocation method of an unmanned aerial vehicle multi-hop relay communication system. Background technique [0002] With the development and maturity of UAV communication technology, UAV is playing an increasingly important role in the field of wireless communication. Due to the high flexibility and high mobility of UAVs, UAVs have given full play to the unique advantages of UAVs in many fields. Multiple drones can accurately transmit the fire situation to the command center in a timely and effective manner, so that the disaster situation can be analyzed fully and effectively, so that the fire fighting plan can be formulated accurately and efficiently, and valuable time can be gained for disaster relief. Compared with the traditional UAV relay trajectory and power optimization with a given bandwi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L12/24H04W24/02H04W24/06
CPCH04B7/18504H04L41/142H04L41/145H04W24/02H04W24/06
Inventor 张广驰樊静窈崔苗林凡
Owner GUANGDONG UNIV OF TECH
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