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International Journal of Telemedicine and Applications
Volume 2009, Article ID 987046, 13 pages
http://dx.doi.org/10.1155/2009/987046
Research Article

Delay Analysis of GTS Bridging between IEEE 802.15.4 and IEEE 802.11 Networks for Healthcare Applications

1Department of Computer Science, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
2Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1

Received 16 June 2008; Accepted 18 September 2008

Academic Editor: Yang Xiao

Copyright © 2009 Jelena Mi¡ić and Xuemin (Sherman) Shen. 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

We consider interconnection of IEEE 802.15.4 beacon-enabled network cluster with IEEE 802.11b network. This scenario is important in healthcare applications where IEEE 802.15.4 nodes comprise patient's body area network (BAN) and are involved in sensing some health-related data. BAN nodes have very short communication range in order to avoid harming patient's health and save energy. Sensed data needs to be transmitted to an access point in the ward room using wireless technology with higher transmission range and rate such as IEEE 802.11b. We model the interconnected network where IEEE 802.15.4-based BAN operates in guaranteed time slot (GTS) mode, and IEEE 802.11b part of the bridge conveys GTS superframe to the 802.11b access point. We then analyze the network delays. Performance analysis is performed using EKG traffic from continuous telemetry, and we discuss the delays of communication due the increasing number of patients.