Distributed relay selection method suitable for simultaneous information and power transfer relay network

A distributed relay and relay network technology, applied in two distributed relay selection fields, can solve the problems of designing relay selection protocols for relay networks without radio frequency signals, and achieve the effect of reducing computational complexity and improving performance

Active Publication Date: 2015-01-07
东开数科(山东)产业园有限公司
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Problems solved by technology

However, for energy-constrained relay networks, most of the research focuses on the case of relay nodes harvesting energy. So far, there is no relay network designed specifically for relaying energy harvesting from the source node’s RF signal. following option agreement

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  • Distributed relay selection method suitable for simultaneous information and power transfer relay network
  • Distributed relay selection method suitable for simultaneous information and power transfer relay network
  • Distributed relay selection method suitable for simultaneous information and power transfer relay network

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] The application scenarios of the distributed relay selection method applicable to the relay network of the communication energy simultaneous interpretation described in the present invention are as follows: figure 1 As shown, where S is the source node, D is the destination node, and R is the relay node. After relay selection, there is a link between the selected relay node and the destination node. The source node forwards the information to the destination node through the selected relay node.

[0032] see image 3 , the present invention provides a distributed relay selection method suitable for the relay network of simultaneous interpretation of information. Each relay node estimates the channel state information of its own forward link and backward link through communication with the source node and the destination node, and then each re...

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Abstract

The invention discloses a distributed relay selection method suitable for a simultaneous information and power transfer relay network. The method is based on a relay selection strategy with maximum collection energy as the purpose and a relay selection strategy with the maximum signal to noise ratio as the purpose. A source node selects one of N relay nodes as the relay node participating in cooperative transfer. The relay selection process includes the steps that each relay node estimates channel state information of a forward link and a backward link of the relay node through communication between the relay node and the source node and between the relay node and a target node, then, the competition time of each relay node is calculated according to the estimated channel information and a pre-defined competition time function, the relay node with the shortest competition time in each time slot is selected as a cooperative node, and the performance of a system can be effectively improved through the distributed relay selection method.

Description

technical field [0001] The present invention relates to a single relay cooperative transmission technology in the technical field of mobile communication, in particular to two distributed relay selection methods in a simultaneous wireless information and power transfer (SWIPT) network. Background technique [0002] Relay cooperative communication is an effective strategy to exploit the available spatial diversity among distributed single-antenna terminals. Due to the natural distribution of relay nodes in wireless relay networks, it is difficult for multiple relay nodes to simultaneously forward signals to destination nodes in resource-constrained or large-scale relay networks. Therefore, various single relay selection methods have been proposed to improve the performance of the system. [0003] In energy-constrained wireless relay networks, such as wireless sensor networks, nodes are usually equipped with fixed energy supply devices, such as batteries. In this way, in sce...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/12H04W40/22
CPCH04W40/12H04W40/22Y02D30/70
Inventor 张超闫静
Owner 东开数科(山东)产业园有限公司
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