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A Greedy Algorithm Based Radio Frequency Energy Source Arrangement Method

A technology of radio frequency energy and layout method, which is applied in the direction of services, circuit devices, network topology, etc. based on specific environments, can solve the problem of low radio frequency energy rate, and achieve the effect of large capture power

Active Publication Date: 2021-02-26
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] However, at this stage, the rate at which RF energy capture sensor nodes capture the RF energy in the environment is still very low, which is one of the bottlenecks for the wide application of this new type of network.

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  • A Greedy Algorithm Based Radio Frequency Energy Source Arrangement Method
  • A Greedy Algorithm Based Radio Frequency Energy Source Arrangement Method
  • A Greedy Algorithm Based Radio Frequency Energy Source Arrangement Method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] refer to figure 1 , a method for arranging radio frequency energy sources based on a greedy algorithm, comprising the following steps:

[0026] Step 1. For i=1, 2,..., M and j=1, 2,..., N, where M is the number of nodes capturing radio frequency energy, and N is the number of candidate layout positions of the radio frequency energy source, according to the formula ( 1) Calculate the power p captured by the i-th node from the energy source placed at the j-th candidate placement position i,j :

[0027]

[0028] Where η represents rectification efficiency, G s Indicates the transmit gain of the energy source antenna, G r Indicates the receiving gain of the node antenna, L p Indicates the polarization loss, λ indicates the wavelength, d i,j is the distance between the i-th node and the j-th candidate arrangement position, P is the energy transmission power ...

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Abstract

A method for arranging radio frequency energy sources based on a greedy algorithm. Aiming at a given node position, a candidate arrangement position of a radio frequency energy source, and the number of energy sources to be arranged, a greedy algorithm is used to select the arrangement position of an energy source. The effective energy capture power increment of a candidate position is defined as the sum of the node’s effective energy capture power increment after an energy source is placed on the candidate position, and the energy sources are arranged one by one by iteratively performing the following operations: Among the candidate positions, the candidate position with the largest effective energy capture power increment is selected, and an energy source is arranged at the candidate position. The method of the invention realizes reasonable selection of the arrangement position of the radio frequency energy source, and can achieve a larger total effective energy capture power.

Description

technical field [0001] The invention relates to a method for arranging radio frequency energy sources based on a greedy algorithm, which is suitable for wireless sensor networks in which sensor nodes can capture radio frequency energy. Background technique [0002] Electromagnetic waves, as a ubiquitous, green and sustainable energy source, have attracted more and more attention from academia and industry. Radio frequency energy harvesting wireless sensor network is a new type of network that captures radio frequency energy in the environment and converts it into electrical energy to support the continuous work of nodes. [0003] However, the rate at which RF energy capture sensor nodes capture the RF energy in the environment is still very low at this stage, which is one of the bottlenecks for the wide application of this new type of network. In order to overcome this weakness, it is a feasible and effective method to deploy a dedicated RF energy source to power the nodes....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/38H04W16/18H04W84/18H02J50/90H02J50/40H02J50/20
CPCH04W16/18H04W84/18H02J50/20H02J50/40H02J50/90H04W4/38
Inventor 池凯凯陈喆飙许星原胡萍郑可琛
Owner ZHEJIANG UNIV OF TECH