Entropy-maximization based adaptive frequency hopping for wireless medical telemetry systems

Kyung Joon Park, Tae Rim Park, Christopher D. Schmitz, Lui Sha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose an adaptive frequency hopping algorithm, entitled robust adaptive frequency hopping (RAFH), for increased reliability of wireless medical telemetry system (WMTS) under coexistence environment with non-medical devices. The conventional adaptive frequency hopping (AFH) scheme classifies channels into "good" or "bad" according to the threshold-based on-off decision, and uses good channels with a uniform hop probability. Unlike the conventional AFH scheme, RAFH solves a constrained entropy maximization problem and assigns each channel a different hop probability, which is a decreasing function of the measured PER. By adopting constrained entropy maximization, RAFH not only improves the average PER, but also reduces the PER fluctuation under dynamic interference environment. Our simulation studies show that RAFH outperforms the basic FH and the conventional AFH with respect to the PER under various scenarios of dynamic interference.

Original languageEnglish (US)
Title of host publicationWiMD 2009 - Proceedings of the 1st ACM International Workshop on Medical-Grade Wireless Networks, co-located with MobiHoc 2009
PublisherAssociation for Computing Machinery, Inc
Pages15-20
Number of pages6
ISBN (Electronic)9781605585246
DOIs
StatePublished - May 18 2009
Event1st ACM International Workshop on Medical-Grade Wireless Networks, WiMD 2009 - New Orleans, United States
Duration: May 18 2009 → …

Publication series

NameWiMD 2009 - Proceedings of the 1st ACM International Workshop on Medical-Grade Wireless Networks, co-located with MobiHoc 2009

Other

Other1st ACM International Workshop on Medical-Grade Wireless Networks, WiMD 2009
Country/TerritoryUnited States
CityNew Orleans
Period5/18/09 → …

Keywords

  • Entropy maximization
  • Frequency hopping spread spectrum
  • Wireless coexistence
  • Wireless medical telemetry system

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Software
  • Hardware and Architecture

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