Change search
ReferencesLink to record
Permanent link

Direct link
Power Effect Control for IEEE 802.15.4 Based Wireless Devices
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The goal of this project was to develop a method that can control the power level of IEEE 802.15.4-based wireless devices by analyzing the incoming signal and steering the strength of the transmitted signal in a way that diminishes the power requirements while keeping an adequate signal.

Local wireless networks connecting simple devices e.g. sensors or power switches, use the standard IEEE 802.15.4 and within it comes a number of built in methods for analyzing the quality of a signal. By studying their behaviour it is determined that the link quality indicator is best suited for these circumstances. Its statistical behaviour is studied for a range of power- levels to create a foundation for the simulations and to map the expected target areas.

A model is constructed in Matlab and a method for power-steering is built. The method analyzes the statistical parameters of the last 16 messages of the incoming signal. Based on where these are in relation to the map created earlier a message is included to the other device about whether to increase or decrease the signal strength. To create more stability as soon as the signal is within the target area the number of sampled messages is increased to 160.

This method is implemented on the IEEE 802.15.4-based wireless devices and the stability is observed. To explore the method further four different target areas are implemented for different requirements of the network and experiments are made with each.

Place, publisher, year, edition, pages
UPTEC F, ISSN 1401-5757 ; 12037
National Category
Information Systems
URN: urn:nbn:se:uu:diva-183802OAI: diva2:564052
Educational program
Master Programme in Engineering Physics
Available from: 2012-11-05 Created: 2012-11-01 Last updated: 2012-11-05Bibliographically approved

Open Access in DiVA

fulltext(713 kB)339 downloads
File information
File name FULLTEXT02.pdfFile size 713 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Holmstedt, Elise
Information Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 339 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 234 hits
ReferencesLink to record
Permanent link

Direct link