DocumentCode :
625304
Title :
The Problem Bit
Author :
Keller, Matthias ; Beutel, Jan ; Thiele, Lothar
Author_Institution :
Comput. Eng. & Networks Lab., ETH Zurich, Zurich, Switzerland
fYear :
2013
fDate :
20-23 May 2013
Firstpage :
105
Lastpage :
114
Abstract :
Health monitoring is an integral service for the long-term operation of wireless sensor networks. Instead of actively adding probe or status traffic, recently proposed passive health monitoring systems infer system health solely from existing application traffic. Our results from extensive testbed experiments prove that the detection rate of an exemplary monitoring application is significantly improved, i.e., by up to 28% to overall 94%, when a passive health estimation method is complemented with a minimally active component. This paper presents Hybrid Monitoring, a novel health monitoring system that combines the advantages of passive and active health monitoring systems. Results from the analysis of passively reconstructed, inexact per-hop timing information are significantly improved when one bit of extra information is added to every packet. The resulting system is able to estimate a significant health metric, i.e., the number of occurred failure events on a node, with a high confidence. The temporal resolution of the estimated signal is equal to the packet sampling interval, the performance of our system is not affected by large packet delays, e.g., when a sensor node is disconnected for a long time.
Keywords :
biomedical communication; patient care; patient monitoring; wireless sensor networks; Hybrid Monitoring; active health monitoring system; application traffic; detection rate; estimated signal; extensive testbed experiment; failure event; health metric; inexact per-hop timing information; integral service; large packet delays; long-term operation; minimally active component; monitoring application; packet sampling interval; passive health estimation method; passive health monitoring system; sensor node; status traffic; system performance; temporal resolution; wireless sensor networks; Delays; Indexes; Monitoring; Spread spectrum communication; Tomography; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Distributed Computing in Sensor Systems (DCOSS), 2013 IEEE International Conference on
Conference_Location :
Cambridge, MA
Print_ISBN :
978-1-4799-0206-4
Type :
conf
DOI :
10.1109/DCOSS.2013.72
Filename :
6569415
Link To Document :
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