Random relay selection method based on energy cooperation

A technology of energy and relay nodes, applied in the direction of electrical components, wireless communication, etc., can solve the problems of ignoring the feasibility of energy loss, blind transmission, energy consumption, etc., and achieve a solid and reliable mathematical model, long communication life, and low probability of interruption Effect

Active Publication Date: 2019-09-20
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, because the relay node cannot accurately know the location of the source node, the feasibility of the energy transmission direction and the energy loss during the transmission process are ignored to a certain extent.
[0004] To sum up, in the current state of relay cooperative communication in the prior art, there is a lack of specific analysis of energy collection and transmission of relay nodes, blind transmission and energy consumption, resulting in a high probability of system interruption

Method used

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  • Random relay selection method based on energy cooperation
  • Random relay selection method based on energy cooperation
  • Random relay selection method based on energy cooperation

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Embodiment 1

[0035] With the rapid development of wireless communication technology, intelligent networks such as fifth-generation (5G) cellular systems and the Internet of Things (IOT) are coming, people's demand for ultra-high data transmission rates, high-density connections and high mobility will indeed be greatly affected be satisfied. All these services require user terminals to have high computing power for real-time signal processing, which accelerates the depletion of embedded batteries, and it is often inconvenient for sensor nodes to replace batteries regularly, especially in remote and low-income areas. Insufficient energy has become the bottleneck of the development of these communication systems and various intelligent Internet networks. The present invention conducts research on this situation and proposes a random relay selection method based on energy cooperation. See figure 1 , the present invention analyzes the energy cooperation between the source node and the relay nod...

Embodiment 2

[0060] The random relay selection method based on energy cooperation is the same as embodiment 1, wherein the energy collection and transmission analysis of the nodes described in step (4) specifically includes the following steps:

[0061] 4.1 Source node energy analysis: The source node selects the communication link according to its own energy state. When the energy storage state of the source node is greater than the energy consumed by sending data to the destination node, the direct link is selected for communication. The energy of the adjacent time slots of the source node The relationship is expressed as:

[0062] L s [n+1]=L s [n]+E s [n]-δ sd

[0063] Among them, L s [n] is the energy storage state of the source node battery in the nth time slot, L s [n+1] is the energy storage state of the source node battery in the n+1th time slot, E s [n] is the energy collected by the source node from the environment, δ sd is the energy consumed by the source node to send ...

Embodiment 3

[0073]The random relay selection method based on energy cooperation is the same as that in Embodiment 1-2, and the path probability P of the direct link is calculated in step (5) of the present invention 1 ,details as follows:

[0074] The performance of a communication system is measured by the corresponding index, and for the wireless relay network, the outage probability becomes the main index to measure it. When the link capacity C does not meet the required user rate r 0 When , an outage event will occur, so whether an outage can occur also depends on the average signal-to-noise ratio of the link and its channel fading distribution model, which is expressed by defining the outage probability as:

[0075] P out =P{C0}=P{γ<ε}

[0076] Among them, γ represents the signal-to-noise ratio, ε is the threshold of the signal-to-noise ratio, and r 0 is the information transmission rate in the communication process, and it can be known from Shannon's theorem Order P sd = δ s...

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Abstract

The invention discloses a random relay selection method based on energy cooperation, and solves the problem of poor interruption performance caused by limited energy in a wireless relay network. According to the implementation scheme, a communication model for data transmission is set; a communication link is selected according to the position distribution condition of the relay node and the battery state of the source node, and the signal-to-noise ratio of the communication link and signals received by the relay node and the destination node is calculated; the source node and the relay node can collect energy from the environment and calculate the steady-state distribution of the battery and the energy consumption of the transmission link; and an interruption probability expression for measuring the system performance is obtained according to the signal-to-noise ratio and the battery steady-state distribution. According to the method, energy cooperation is introduced, energy cooperation is carried out on the source node and the relay node, communication link selection is carried out through steady-state distribution of the battery, the interruption probability of the relay model is obtained, and by adopting the method, the smaller interruption probability can be obtained, the performance is better, and the method is used for energy-carrying communication of the wireless relay network.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to relay communication under energy cooperation, in particular to a random relay selection method based on energy cooperation, which is used for wireless sensor network communication. Background technique [0002] At present, in the wireless communication network, the relay can not only assist the source node to transmit data to the destination node, but also improve the system capacity while saving the transmission power, so the relay technology has become one of the research hotspots in the communication field. However, due to the frequent use of relay nodes and the inability to regularly replace node batteries, energy holes appear in the network, which in turn affects the life of the sensor network. The emergence of energy harvesting technology can just overcome this bottleneck. [0003] Initially, energy harvesting technology considered harvesting energy from the surrou...

Claims

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Application Information

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IPC IPC(8): H04W24/06H04W40/10H04W40/12H04W40/22
CPCH04W24/06H04W40/10H04W40/12H04W40/22
Inventor 刘向丽刘冬妮李海娇李赞
Owner XIDIAN UNIV
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