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
Local Time Synchronization in Bluetooth Piconets for Data Fusion Using Mobile Phones
KTH, School of Technology and Health (STH), Data- och elektroteknik (Closed 20130701).ORCID iD: 0000-0003-1668-9896
KTH, School of Technology and Health (STH), Data- och elektroteknik (Closed 20130701).
KTH, School of Technology and Health (STH).
2011 (English)In: BSN 2011: 8th International Conference on Body Sensor Networks, 2011, 113-138 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a method to synchronize the clocks in a Bluetooth piconet from the application layer in a mobile phone. It adapts algorithms for time synchronization of distributed systems and the Internet to Bluetooth networks. The performance issues that cause problems for data synchronization between master and slaves in Bluetooth are highlighted. The tests show that the synchronization error is limited to one sampling time.

Place, publisher, year, edition, pages
2011. 113-138 p.
National Category
Medical Laboratory and Measurements Technologies
Identifiers
URN: urn:nbn:se:kth:diva-84244DOI: 10.1109/BSN.2011.11Scopus ID: 2-s2.0-80051983426ISBN: 978-0-7695-4431-1 (print)OAI: oai:DiVA.org:kth-84244DiVA: diva2:499247
Conference
8th International Conference on Body Sensor Networks, BSN 2011. Dallas, TX. 23 May 2011 - 25 May 2011
Note

QC 20120214

Available from: 2012-02-13 Created: 2012-02-13 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
2. Multi-Sensor Data Synchronization using Mobile Phones
Open this publication in new window or tab >>Multi-Sensor Data Synchronization using Mobile Phones
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Body sensor networking is a rapidly growing technology. Today wearable sensors are used to measure and monitor e.g. pulse, temperature, skin conductance, heart activity, and movement (through GPS or inertial measurement units). Mobile phones can act as coordinating nodes in wireless personal area networks used in home automation, healthcare, sport and wellness e.g. to measure pulse and distance. Integration of data from multiple sources sensors (data fusion) means that data from each sensor node needs to be associated with data from other sensor nodes sampled at approximately the same time. Accurate methods for time synchronization are therefore a necessary prerequisite for reliable data fusion.

This thesis studies time synchronization problems in Bluetooth piconets between multiple wireless sensor nodes connected to a mobile phone that acts as coordinating node. Three different algorithms to enable correct data fusion have been developed, implemented and evaluated. The first is a single clock solution that synchronizes multiple wireless sensor nodes based solely on the mobile phone’s clock. The other two algorithms synchronize the clocks in sensor nodes to the clock in the coordinating node. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. 17 p.
Series
Trita-STH : report, ISSN 1653-3836 ; 2013:5
Keyword
wireless body sensor networks, wireless personal area network, sport technology, Bluetooth performance, time synchronization, data fusion, mobile phone application.
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-123222 (URN)978-91-7501-780-8 (ISBN)
Presentation
2013-06-12, LH3-515, Alfred Nobels allé 10, Huddinge, 14:15 (English)
Opponent
Supervisors
Note

QC 20130605

Available from: 2013-06-05 Created: 2013-06-04 Last updated: 2013-06-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Wåhslén, JonasOrhan, IbrahimLindh, Thomas
By organisation
Data- och elektroteknik (Closed 20130701)School of Technology and Health (STH)
Medical Laboratory and Measurements Technologies

Search outside of DiVA

GoogleGoogle Scholar

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 269 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