Trajectory optimization and resource allocation method for single unmanned aerial vehicle backscatter communication network

A technology of backscattering and communication network, applied in the direction of wireless communication, sustainable communication technology, radio transmission system, etc., can solve the problem of not considering the energy consumption of drones, achieve good link status and communication quality, and improve the system Energy efficiency, the effect of reducing energy consumption

Active Publication Date: 2021-03-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In addition, the existing research is all about the energy problem of ground users, without considering the energy consumption of UAVs

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  • Trajectory optimization and resource allocation method for single unmanned aerial vehicle backscatter communication network
  • Trajectory optimization and resource allocation method for single unmanned aerial vehicle backscatter communication network
  • Trajectory optimization and resource allocation method for single unmanned aerial vehicle backscatter communication network

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Embodiment Construction

[0032] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0033] The present invention proposes a single UAV backscatter communication network trajectory optimization and resource allocation method oriented to energy efficiency optimization, which jointly considers UAV trajectory and time resource allocation. scatter communication network.figure 1 In the scenario shown, a UAV with a rotor wing collects data from M (M ≥ 1) ground backscatter nodes BN, and the BN nodes transmit data by reflecting RF radio frequency signals emitted by PB (Power Beacon, signal tower); Backscatter nodes are uniformly and independently distributed around the PB; drones and reflection nodes BN can harvest energy from the PB. The height of PB is H, and there is a stable energy source. As the wireless energy source of the system, the transmission power of PB is P B express.

[0034] Establish a three-dimensional Cartesian coordinat...

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Abstract

The invention provides a trajectory optimization and resource allocation method for a single unmanned aerial vehicle backscatter communication network, and belongs to the technical field of unmanned aerial vehicle backscatter communication networks. The method comprises the following steps: 1, clustering a target area formed by all ground backscattering nodes according to node positions, dividingthe target area into N cells, and obtaining a centroid position of each cell; 2, setting the unmanned aerial vehicle to continuously fly among cells, and hovering above the centroid position of each cell to acquire data; 3, establishing an optimization target of single unmanned aerial vehicle backscatter communication network trajectory optimization and resource allocation; 4, decoupling the optimization target, converting the optimization target into a problem of dividing the hovering time of each cell and the proportion of the collected energy to the transmission time in each cell, iteratively solving, and outputting the optimal service time Ti of each cell and the proportion parameter beta i in each cell. According to the method, the energy consumption of the unmanned aerial vehicle isreduced, time resources are utilized to the maximum extent, and the system energy efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of UAV backscatter communication network, in particular to a single UAV backscatter communication network trajectory optimization and resource allocation method for energy efficiency optimization. Background technique [0002] As a cost-effective communication technology, the proposal of backscatter communication technology provides an effective solution for a large number of energy-constrained low-cost devices. Among them, the backscatter transmitter transmits information by reflecting the modulated signal, and does not require active radio frequency components, which reduces the power consumption of the circuit by several orders of magnitude. In the ambient backscatter network, the backscatter nodes (Backscatter Nodes, BNs) can obtain the energy required for their operation from environmental radio frequency sources such as Wi-Fi signals. BN collects energy from the radio frequency (Radio Frequency, RF) s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04W52/02
CPCH04B7/18506H04W52/02Y02D30/70
Inventor 李曦唐国强纪红张鹤立
Owner BEIJING UNIV OF POSTS & TELECOMM
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