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Wireless Communications and Mobile Computing
Volume 2017, Article ID 6267579, 20 pages
https://doi.org/10.1155/2017/6267579
Research Article

A Novel Cooperation-Based Network Coding Scheme for Walking Scenarios in WBANs

1School of Electrical, Computer and Telecommunications Engineering, Faculty of Engineering and Information Science, University of Wollongong, Wollongong, NSW 2522, Australia
2College of Computer, National University of Defense Technology, Changsha, Hunan 410073, China

Correspondence should be addressed to Hongyun Zhang; ua.ude.liamwou@796zh

Received 29 May 2017; Revised 30 July 2017; Accepted 6 August 2017; Published 14 September 2017

Academic Editor: Donatella Darsena

Copyright © 2017 Hongyun Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In Wireless Body Area Networks (WBANs), the tradeoff between network throughput and energy efficiency remains a key challenge. Most current transmission schemes try to cope with the challenge from the perspective of general Wireless Sensor Networks (WSNs), which may not take the peculiarities of WBAN channels into account. In this paper, we take advantage of the correlation of on-body channels in walking scenarios to achieve a better tradeoff between throughput and energy consumption. We first analyze the characteristics of on-body channels based on realistic channel gain datasets, which are collected by our customized wireless transceivers in walking scenarios. The analytical results confirm the rationale of our newly proposed transmission scheme A3NC, which explores the combination of the aggregative allocation (AA) mechanism in MAC layer and the Analog Network Coding (ANC) technique in PHY layer. Both theoretical analyses and simulation results show that the A3NC scheme achieves significant improvement in upload throughput and energy efficiency, compared to the conventional approaches.