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Relay selection method for energy harvesting wireless network

A wireless network and energy harvesting technology, applied in wireless communication, access restriction, electrical components, etc., can solve problems such as inability to reasonably select relay nodes, incompatibility, inability to effectively obtain the minimum interruption probability, etc.

Inactive Publication Date: 2014-05-14
XI AN JIAOTONG UNIV
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Problems solved by technology

When there is no energy harvesting, only the optimal relay is selected for transmission, so wireless opportunity passing is considered to be an effective way to improve the outage performance of wireless transmission; however, the current power allocation and relay selection scheme is based on the total power Therefore, the existing technology may not be suitable for the energy harvesting situation. Therefore, it is necessary to re-examine the power allocation and relay selection algorithms. The minimum outage probability of the energy harvesting wireless network can effectively evaluate the signal The rationality of relay node selection in the transmission process, but the existing technology cannot effectively obtain the minimum interruption probability, so that the relay node cannot be reasonably selected

Method used

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  • Relay selection method for energy harvesting wireless network
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  • Relay selection method for energy harvesting wireless network

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Embodiment Construction

[0032] The present invention is described in further detail below in conjunction with accompanying drawing:

[0033] The specific operation process of the relay selection method for the energy harvesting wireless network described in the present invention is:

[0034] The energy harvesting wireless network includes a source node S, a terminal node D, and N relay nodes. The signal is transmitted T times, and each transmission is divided into two stages. In the first stage, the source node S uses the same power P s Transmitting a signal; the second stage is to select the optimal relay node to receive the signal, and forward the signal to the terminal node D, where the relay node is equipped with an energy storage device, and after the relay node receives the signal, The signal will harvest energy at the relay node, where the fading coefficient of the channel in the first stage is expressed as The fading coefficient of the channel in the second stage is Assuming that the fadi...

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Abstract

The invention discloses a relay selection method for an energy harvesting wireless network. The method comprises the steps that in the acquiring process, an objective function which enables the outage probability to be minimal is established according to the limiting condition of energy harvesting; meanwhile, a heuristic dynamic power distribution and corresponding relay selection method is provided for solving the objective function, in the solving process, the energy acquired by signals from relay nodes are made dynamic, and therefore the precise minimal outage probability in the energy harvesting wireless network is obtained.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a relay selection method for an energy harvesting wireless network. Background technique [0002] Energy harvesting is a research hotspot in the field of wireless networks. When communication nodes have continuous and unreliable energy storage devices, re-study of traditional communication technologies becomes very meaningful. Currently, research on energy harvesting mainly focuses on the problems of throughput maximization, resource allocation and scheduling, or hybrid energy storage systems. In the energy harvesting mode of storage and transmission, the reliability and efficiency of transmission can be improved by optimizing the ratio of storage and transmission time. When there is no energy harvesting, only the optimal relay is selected for transmission, so wireless opportunity passing is considered to be an effective way to improve the outage performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/20H04W52/24
Inventor 李国兵张艺珍吕刚明张国梅
Owner XI AN JIAOTONG UNIV
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