Buffer-aided relaying scheme with energy harvesting in a cognitive wireless sensor network

Thanh-Dat Le ,Oh–Soon Shin

doi:10.1177/1550147717709962

Thanh-Dat Le , Oh–Soon Shin

Open Access

https://doi.org/10.1177/1550147717709962

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Abstract

This article presents a practical relaying scheme that improves the outage performance of a cognitive wireless sensor network. The relays in the proposed system have finite buffers and they are sel...

Highlights

Wireless sensor networks (WSNs) are considered key enablers for the Internet of Things (IoT), and these are employed over a wide range of use cases, including building management, transportation and logistics, health care, and smart grids.[1,2] In a WSN, energy efficiency is crucial because it determines the network lifetime
Multihop transmissions using wireless relays have been accepted as a powerful means to improve the energy efficiency of the WSNs
This article presented a hybrid relaying scheme to exploit the benefits of the buffer-aided relay to improve the performance of a cognitive WSN with energy harvesting capabilities

Summary

Introduction

Wireless sensor networks (WSNs) are considered key enablers for the Internet of Things (IoT), and these are employed over a wide range of use cases, including building management, transportation and logistics, health care, and smart grids.[1,2] In a WSN, energy efficiency is crucial because it determines the network lifetime. The outage performance will benefit from the significant increase in the coding gain of this scheme.[11] We assume that each buffer has contained a certain number of packets that would be dedicated to the handshake process between the nodes in the initial phase, and the best relays for reception and transmission are, respectively, determined as krÃ = arg max gSRk and ktÃ = arg max gRkD ð5Þ k2f1, 2, ..., Kg. under a practical assumption of finite buffers,[15] the scenarios with a full or empty buffer are possible for which the selected relays cannot receive or transmit data. + EgSRp k2\PRr(n)k2y\PRk 0(+ng)SRsgk2SR!p (IyggktShR+,k rzsy+k2g) Rs!k2Dg\th,grtzhy+k g!Rskk2D=\1KY ,Àkg62nthR(n!) Pkr=y1KY P,kÀk0+62ngRS(Rsnk)2P\rggthSRp

À expP0lSRp ð15Þ

Findings

Conclusion