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Sensors 2017, 17(1), 151; doi:10.3390/s17010151

A Study on Coexistence Capability Evaluations of the Enhanced Channel Hopping Mechanism in WBANs

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (BUPT), No. 10 Xitucheng Road, Haidian District, Beijing 100876, China
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Author to whom correspondence should be addressed.
Academic Editor: Giancarlo Fortino
Received: 14 August 2016 / Revised: 22 December 2016 / Accepted: 23 December 2016 / Published: 14 January 2017
(This article belongs to the Section Sensor Networks)

Abstract

As an important coexistence technology, channel hopping can reduce the interference among Wireless Body Area Networks (WBANs). However, it simultaneously brings some issues, such as energy waste, long latency and communication interruptions, etc. In this paper, we propose an enhanced channel hopping mechanism that allows multiple WBANs coexisted in the same channel. In order to evaluate the coexistence performance, some critical metrics are designed to reflect the possibility of channel conflict. Furthermore, by taking the queuing and non-queuing behaviors into consideration, we present a set of analysis approaches to evaluate the coexistence capability. On the one hand, we present both service-dependent and service-independent analysis models to estimate the number of coexisting WBANs. On the other hand, based on the uniform distribution assumption and the additive property of Possion-stream, we put forward two approximate methods to compute the number of occupied channels. Extensive simulation results demonstrate that our estimation approaches can provide an effective solution for coexistence capability estimation. Moreover, the enhanced channel hopping mechanism can significantly improve the coexistence capability and support a larger arrival rate of WBANs. View Full-Text
Keywords: WBANs; channel hopping mechanism; channel conflict; coexistence capability estimation WBANs; channel hopping mechanism; channel conflict; coexistence capability estimation
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Wei, Z.; Sun, Y.; Ji, Y. A Study on Coexistence Capability Evaluations of the Enhanced Channel Hopping Mechanism in WBANs. Sensors 2017, 17, 151.

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