Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Contention-Based Wireless Sensor Networks: A case study for ambient assisted living
University of Dresden, Germany.
KTH, School of Technology and Health (STH), Data- och elektroteknik (Closed 20130701).
KTH, School of Technology and Health (STH), Data- och elektroteknik (Closed 20130701).
KTH, School of Technology and Health (STH), Medical Engineering.
Show others and affiliations
2010 (English)In: Active Ageing, Smart Solutions, New Markets, 2010Conference paper, Published paper (Refereed)
Abstract [en]

Wireless personal area networks have emerged as an important communication infrastructure in areas such as at-home healthcare and home automation, independent living and assistive technology. Initiatives towards interoperability and standardization are taken by several players. Zigbee Alliance has launched a profile for “Zigbee wireless sensor applications for health, wellness and fitness” [1]. The Continua Health Alliance promotes “an interoperable personal healthcare ecosystem”. They have published “design guidelines for the telehealth ecosystem” including the interface to personal area network health devices and electronic health record devices ([2], [3]). These examples show that wireless personal area networks, including body sensor networks, are becoming more mature and are considered to be a realistic alternative as communication infrastructure for demanding services. However, to transmit vital sign parameters from ECGs, pulse-oximeters, EEGs etc in wireless networks is also a challenge, especially if multiple sensors compete for access. Contention-based access networks offer simplicity and utilization advantages, but the drawback is unpredictable performance due to loss of transmitted packets.

We have used the SHIMMER wireless sensor platform developed at Intel [4] in the living lab at the Centre for Health and Building at KTH in a case study to identify and evaluate performance problems. The full-scale living lab consists of two apartments especially equipped with modern technique for healthcare at home and assisted living.

Our paper focuses on continuous monitoring of the heart activity using a wireless ECG based on the wireless personal area network (WPAN) standard IEEE 802.15.4. Results from performance tests in the living lab will be presented e.g. influence of equipment such as micro wave ovens. Since contention-based wireless access has no guarantees for the quality of the delivered service it is interesting to determine to what extent the received ECG signal is sensitive to loss of information. We have recorded ECG signals as well as emulated packet loss in existing ECG records from official databases. The result of two cardiologists´ assessment of ECGs with different loss ratio levels and patterns will be reported in the paper. One interesting conclusion is that a diagnosis is fully possible for ECGs with packet loss ratio up to at least 5%. This project is part of research at the School of Technology and Health at KTH.

Place, publisher, year, edition, pages
2010.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-37888OAI: oai:DiVA.org:kth-37888DiVA: diva2:435463
Conference
AAL Forum 2010, Odense, Denmark
Note

QC 20111114

Available from: 2011-08-18 Created: 2011-08-18 Last updated: 2016-02-22Bibliographically approved
In thesis
1. Performance Monitoring and Control in Wireless Sensor Networks
Open this publication in new window or tab >>Performance Monitoring and Control in Wireless Sensor Networks
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Wireless personal area networks have emerged as an important communication infrastructure in areas such as at-home healthcare and home automation, independent living and assistive technology, as well as sports and wellness. Wireless personal area networks, including body sensor networks, are becoming more mature and are considered to be a realistic alternative as communication infrastructure for demanding services. However, to transmit data from e.g., an ECG in wireless networks is also a challenge, especially if multiple sensors compete for access. Contention-based networks offer simplicity and utilization advantages, but the drawback is lack of predictable performance. Recipients of data sent in wireless sensor networks need to know whether they can trust the information or not. Performance measurements, monitoring and control is of crucial importance for medical and healthcare applications in wireless sensor networks.

This thesis focuses on development, prototype implementation and evaluation of a performance management system with performance and admission control for wireless sensor networks. Furthermore, an implementation of a new method to compensate for clock drift between multiple wireless sensor nodes is also shown. Errors in time synchronization between nodes in Bluetooth networks, resulting in inadequate data fusion, are also analysed.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. vi, 21 p.
Series
TRITA-STH : report, ISSN 1653-3836 ; 2012:3
Keyword
body sensor networks, wireless sensor networks, performance monitoring, performance control, admission control, Bluetooth performance, clock drift compensation, time synchronization
National Category
Medical Engineering Communication Systems
Identifiers
urn:nbn:se:kth:diva-94545 (URN)978-91-7501-354-1 (ISBN)
Presentation
2012-06-05, Sal 3-221, Alfred Nobels allé 10, Huddinge, 11:00 (English)
Opponent
Supervisors
Note

QC 20120529

Available from: 2012-05-29 Created: 2012-05-10 Last updated: 2016-02-22Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Lindh, ThomasOrhan, IbrahimBrodin, Lars-ÅkeLundberg, Stefan
By organisation
Data- och elektroteknik (Closed 20130701)Medical EngineeringCentre for Health and Building, CHB
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 426 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf