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Performance Monitoring and Control in Wireless Sensor Networks
KTH, School of Technology and Health (STH), Data- och elektroteknik (Closed 20130701).
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 [en]
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: urn:nbn:se:kth:diva-94545ISBN: 978-91-7501-354-1 (print)OAI: oai:DiVA.org:kth-94545DiVA: diva2:526016
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
List of papers
1. NeTraWeb - A Web-Based Traffic Flow Performance Meter
Open this publication in new window or tab >>NeTraWeb - A Web-Based Traffic Flow Performance Meter
Show others...
2006 (English)In: 4th Swedish National Computer Networking Workshop SNCNW 2006, 2006Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a web-based traffic flow performance meter. The NeTraWeb tool configures and automates the measurement activities, including storage and presentation of the main performance parameters.

National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-84637 (URN)
Conference
Swedish National Computer Networking Workshop, October 26-27 2006, Luleå
Note

QC 20120217

Available from: 2012-02-17 Created: 2012-02-13 Last updated: 2016-02-22Bibliographically approved
2. An End-to-End Performance Meter for Applications in Wireless Body Sensor Networks
Open this publication in new window or tab >>An End-to-End Performance Meter for Applications in Wireless Body Sensor Networks
2008 (English)In: 2008 5th International Summer School and Symposium on Medical Devices and Biosensors, Institute of Electrical and Electronics Engineers (IEEE), 2008, 295-298 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a monitoring method and its implementation as a light-weight end-to-end performance meter for quality-demanding applications in wireless body sensor networks. The method is evaluated in a wireless sensor network testbed for healthcare applications.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2008
Keyword
Biosensors, Health, Metric system, Sensor networks, Sensors, Wireless networks, Demanding applications, End-to-end performances, Health care applications, Light weighting, Medical Devices, Summer schools, Test beds, Wireless body sensor networks, Wireless sensors
National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-38743 (URN)10.1109/ISSMDBS.2008.4575086 (DOI)000260566000076 ()2-s2.0-51949091342 (Scopus ID)978-1-4244-2252-4 (ISBN)
Conference
5th International Workshop on Wearable and Implantable Body Sensor Networks, BSN 2008, in conjunction with the 5th International Summer School and Symposium on Medical Devices and Biosensors, ISSS-MDBS 2008; Hong Kong; 1 June 2008 through 3 June 2008
Note

QC 20120529

Available from: 2011-09-07 Created: 2011-08-31 Last updated: 2016-09-29Bibliographically approved
3. Performance Monitoring and Control in Contention-Based Wireless Sensor Networks
Open this publication in new window or tab >>Performance Monitoring and Control in Contention-Based Wireless Sensor Networks
2009 (English)In: Proceedings of the 2009 6th International Symposium on Wireless Communication Systems, ISWCS'09, NEW YORK: IEEE conference proceedings, 2009, 507-511 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper presents a method for performance monitoring and control in wireless body sensor networks based on measurement feedback. Test results using a prototype implementation of the method are also analyzed. The method has been evaluated for demanding healthcare related applications in wireless personal area networks.

Place, publisher, year, edition, pages
NEW YORK: IEEE conference proceedings, 2009
National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-30188 (URN)10.1109/ISWCS.2009.5285347 (DOI)000274636700103 ()2-s2.0-71449118823 (Scopus ID)978-1-4244-3583-8 (ISBN)
Conference
6th IEEE International Symposium on Wireless Communication Systems (ISWCS 09) Siena, ITALY, SEP 07-10, 2009
Note

QC 20150707

Available from: 2011-02-28 Created: 2011-02-21 Last updated: 2016-02-22Bibliographically approved
4. Measurement-Based Admission Control in Wireless Sensor Networks
Open this publication in new window or tab >>Measurement-Based Admission Control in Wireless Sensor Networks
2010 (English)In: 2010 FOURTH INTERNATIONAL CONFERENCE ON SENSOR TECHNOLOGIES AND APPLICATIONS (SENSORCOMM), IEEE , 2010, 447-452 p.Conference paper, Published paper (Refereed)
Abstract [en]

Wireless sensor networks have today emerged as a feasible infrastructure for healthcare applications. This paper addresses the non-trivial performance problems in contention-based wireless networks. We present a method for admission control in contention-based networks, implemented as a component of a performance management system. The test results show that admission control can improve the predictability and level of performance in wireless sensor networks. The system can be used as a tool for dimensioning and configuration as well as for real-time admission control. The often unpredictable dynamics in contention-based access networks means that continuous performance control is needed to maintain a desired quality of service.

Place, publisher, year, edition, pages
IEEE, 2010
Keyword
wireless sensor networks; admission control; performance monitoring and control
National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-84233 (URN)10.1109/SENSORCOMM.2010.71 (DOI)000296392600075 ()2-s2.0-77957944672 (Scopus ID)978-0-7695-4096-2 (ISBN)
Conference
4th International Conference on Sensor Technologies and Applications (SENSORCOMM), Mestre, ITALY, JUL 18-25, 2010
Note

© 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20120217

Available from: 2012-02-17 Created: 2012-02-13 Last updated: 2016-02-22Bibliographically approved
5. Local Time Synchronization in Bluetooth Piconets for Data Fusion Using Mobile Phones
Open this publication in new window or tab >>Local Time Synchronization in Bluetooth Piconets for Data Fusion Using Mobile Phones
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.

National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-84244 (URN)10.1109/BSN.2011.11 (DOI)2-s2.0-80051983426 (Scopus ID)978-0-7695-4431-1 (ISBN)
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
6. Performance evaluation of time synchronization and clock drift compensation in wireless personal area networks
Open this publication in new window or tab >>Performance evaluation of time synchronization and clock drift compensation in wireless personal area networks
2012 (English)In: BodyNets '12 Proceedings of the 7th International Conference on Body Area Networks, ICST , 2012, 153-158 p.Conference paper, Published paper (Refereed)
Abstract [en]

Efficient algorithms for time synchronization, including compensation for clock drift, are essential in order to obtain reliable fusion of data samples from multiple wireless sensor nodes. This paper evaluates the performance of algorithms based on three different approaches; one that synchronizes the local clocks on the sensor nodes, and a second that uses a single clock on the receiving node (e.g. a mobile phone), and a third that uses broadcast messages. The performances of the synchronization algorithms are evaluated in wireless personal area networks, especially Bluetooth piconets and ZigBee/IEEE 802.15.4 networks. A new approach for compensation of clock drift and a realtime implementation of single node synchronization from the mobile phone are presented and tested. Finally, applications of data fusion and time synchronization are shown in two different use cases; a kayaking sports case, and monitoring of heart and respiration of prematurely born infants. 

Place, publisher, year, edition, pages
ICST, 2012
Keyword
Time synchronization, clock drift, data fusion, Bluetooth, IEEE 802.15.4.
National Category
Communication Systems
Identifiers
urn:nbn:se:kth:diva-123218 (URN)10.4108/icst.bodynets.2012.250342 (DOI)2-s2.0-84908592912 (Scopus ID)978-193696860-2 (ISBN)
Conference
7th International Conference on Body Area Networks, BODYNETS 2012, Oslo, Norway, 24 September 2012 through 26 September 2012
Note

QC 20130605

Available from: 2013-06-04 Created: 2013-06-04 Last updated: 2016-02-22Bibliographically approved
7. Measurement-Based Performance and Admission Controlin Wireless Sensor Networks
Open this publication in new window or tab >>Measurement-Based Performance and Admission Controlin Wireless Sensor Networks
2011 (English)In: The International Journal on Advances in Systems and Measurement, ISSN 1942-261x, Vol. 4, no 1-2, 32-45 p.Article in journal (Refereed) Published
Abstract [en]

This journal paper presents a measurement-basedperformance management system for contention-based wireless sensor networks. Its main features are admission andperformance control based on measurement data from lightweight performance meters in the endpoints. Test results showthat admission and performance control improve the predictability and level of performance. The system can also be used asa tool for dimensioning and configuration of services in wireless sensor networks. Among the rapidly emerging services inwireless sensor networks we focus on healthcare applications

Place, publisher, year, edition, pages
IARIA, 2011
Keyword
wireless sensor network, admission control, performance monitoring and control
National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-84683 (URN)
Note

Qc 20120215

Available from: 2012-02-15 Created: 2012-02-13 Last updated: 2016-02-22Bibliographically approved
8. Contention-Based Wireless Sensor Networks: A case study for ambient assisted living
Open this publication in new window or tab >>Contention-Based Wireless Sensor Networks: A case study for ambient assisted living
Show others...
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.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-37888 (URN)
Conference
AAL Forum 2010, Odense, Denmark
Note

QC 20111114

Available from: 2011-08-18 Created: 2011-08-18 Last updated: 2016-02-22Bibliographically approved

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CiteExportLink to record
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Citation style
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  • modern-language-association-8th-edition
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  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
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