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Sensors 2010, 10(11), 9919-9934; doi:10.3390/s101109919

MAC-Bridging for Multi-PHYs Communication in BAN

* ,
Graduate School of Telecommunication Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, South Korea
* Author to whom correspondence should be addressed.
Received: 9 September 2010 / Revised: 23 October 2010 / Accepted: 25 October 2010 / Published: 5 November 2010
(This article belongs to the Section Physical Sensors)
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Body Area Network (BAN) is a collection of low-power, miniaturised, and intelligent sensor nodes that are used for unobtrusive and ambulatory health monitoring of a patient without any additional constraints. These nodes operate on different frequency bands or Multiple Physical Layers (Multi-PHYs). Additionally, some BAN applications demand a logical connection between different nodes working on different Multi-PHYs. In this paper, the idea of controlling Multi-PHYs using one MAC protocol is introduced. Unlike existing procedures where different nodes working on different channels are connected at the link layer bridging/switching, the proposed procedure called bridging logically connects them at the MAC layer. In other words, the bridge is used to relay or filter packets between different PHYs in the same BAN. Numerical approximations are presented to analyze the stochastic behaviour of the bridges, all of them having Multi-PHYs interfaces. The MICS and the ISM bands are regarded as PHY1 and PHY2, respectively. The performance results are presented for PHY2 (given that data is already received from PHY1) in terms of probability of successful transmission, number of failed requests, power consumption, and delay. Simulations are conducted to validate the analytical results. It can be seen that the deployment of multiple bridges along with the corresponding nodes allows Multi-PHYs communication with high transmission probability, low power consumption, and tolerable delay.
Keywords: WBAN; MAC; transparency; wireless; multiple; physical; frequency bands; channels; Body Area Network WBAN; MAC; transparency; wireless; multiple; physical; frequency bands; channels; Body Area Network
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.

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Ullah, S.; Khan, P.; Ullah, N.; Kwak, K.S. MAC-Bridging for Multi-PHYs Communication in BAN. Sensors 2010, 10, 9919-9934.

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