Cited 7 time in webofscience Cited 9 time in scopus

Design of robust adaptive frequency hopping for wireless medical telemetry systems

Title
Design of robust adaptive frequency hopping for wireless medical telemetry systems
Authors
Park, Kyung-JoonPark, T. R.Schmitz, C. D.Sha, L.
DGIST Authors
Park, Kyung-Joon
Issue Date
2010
Citation
IET Communications, 4(2), 178-191
Type
Article
Article Type
Article
Keywords
HEALTH-CARENETWORKSBAND
ISSN
1751-8628
Abstract
The authors propose an adaptive frequency hopping (AFH) algorithm, entitled robust adaptive frequency hopping (RAFH), for providing increased reliability of a wireless medical telemetry system (WMTS) under coexistence environment with non-medical devices. The conventional AFH scheme classifies channels into 'good' or 'bad' according to the threshold-based on-off decision by packet error rate (PER) measurement, and only uses good channels with a uniform hop probability. Unlike the conventional AFH scheme, RAFH is a novel technique, which solves a constrained entropy maximisation problem and assigns every channel a different hop probability as a decreasing function of the measured PER. The key novelty of RAFH over existing AFH schemes is that it reflects the relative channel condition by assigning non-uniform hop probabilities. By adopting constrained entropy maximisation, RAFH not only improves the average PER, but also reduces the PER fluctuation over time under a dynamic interference environment, both of which increase the reliability of WMTS. Through extensive simulation, we show that RAFH outperforms basic frequency hopping (FH) and the conventional AFH with respect to the PER under various scenarios of dynamic interference.
URI
http://hdl.handle.net/20.500.11750/6506
DOI
10.1049/iet-com.2008.0693
Publisher
Institution of Engineering and Technology
Related Researcher
  • Author Park, Kyung-Joon CSI(Cyber-Physical Systems Integration) Lab
  • Research Interests Cyber-Physical Systems; 무선 센서-액츄에이터 네트워크; 스마트 팩토리
Files:
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Collection:
Department of Information and Communication EngineeringCSI(Cyber-Physical Systems Integration) Lab1. Journal Articles


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