Trajectory optimization and resource allocation method for single UAV backscatter communication network

A backscattering, communication network technology, applied in 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: 2021-12-03
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 UAV backscatter communication network
  • Trajectory optimization and resource allocation method for single UAV backscatter communication network
  • Trajectory optimization and resource allocation method for single UAV 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 1In 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 coordina...

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Abstract

The invention proposes a single UAV backscatter communication network trajectory optimization and resource allocation method, which belongs to the technical field of UAV backscatter communication network. Including: step 1, cluster the target area composed of all ground backscatter nodes according to the node positions, divide it into N cells, and obtain the centroid position of each cell; step 2, set the UAV to fly continuously between the cells , and hover above the centroid position of each cell to collect data; Step 3, establish the optimization goal of single UAV backscatter communication network trajectory optimization and resource allocation; Step 4, decouple the optimization goal and convert it into each The problem of the hovering time of each cell and the ratio of energy collection and transmission time in each cell is solved iteratively, and the optimal service time T of each cell is output. i and the proportional parameter β in each plot i . The method of the invention reduces the energy consumption of the unmanned aerial vehicle, utilizes time resources to the greatest extent, and significantly improves the energy efficiency of the system.

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 an ambient backscatter network, Backscatter Nodes (BNs) can obtain the energy required for their operation from ambient radio frequency sources such as Wi-Fi signals. BN collects energy from the radio frequency (Radio Frequency, RF) signal sent by the signal sourc...

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Application Information

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Patent Type & Authority Patents(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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