Change search
ReferencesLink to record
Permanent link

Direct link
Improving Low-Power Wireless Protocols with Timing-Accurate Simulation
RISE, Swedish ICT, SICS. Department of Information Technology.
Number of Authors: 1
2011 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

Low-power wireless technology enables numerous applications in areas from environmental monitoring and smart cities, to healthcare and recycling. But resource-constraints and the distributed nature of applications make low-power wireless networks difficult to develop and understand, resulting in increased development time, poor performance, software bugs, or even network failures. Network simulators offer full non-intrusive visibility and control, and are indispensible tools during development. But simulators do not always adequately represent the real world, limiting their applicability. In this thesis I argue that high simulation timing accuracy is important when developing high-performance low-power wireless protocols. Unlike in generic wireless network simulation, timing becomes important since low-power wireless networks use extremely timing-sensitive software techniques such as radio duty-cycling. I develop the simulation environment Cooja that can simulate low-power wireless networks with high timing accuracy. Using timing-accurate simulation, I design and develop a set of new low-power wireless protocols that improve on throughput, latency, and energy-efficiency. The problems that motivate these protocols were revealed by timing-accurate simulation. Timing-accurate software execution exposed performance bottlenecks that I address with a new communication primitive called Conditional Immediate Transmission (CIT). I show that CIT can improve on throughput in bulk transfer scenarios, and lower latency in many-to-one convergecast networks. Timing-accurate communication exposed that the hidden terminal problem is aggravated in duty-cycled networks that experience traffic bursts. I propose the Strawman mechanism that makes a radio duty-cycled network robust against traffic bursts by efficiently coping with hidden terminals. The Cooja simulation environment is available for use by others and is the default simulator in the Contiki operating system since 2006.

Place, publisher, year, edition, pages
Uppsala, Sweden: Uppsala University , 2011, 13. , 222 p.
Series
, SICS Dissertation, urn:nbn:se:uu:diva-159886
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:ri:diva-23893ISBN: 978-91-554-8182-7OAI: oai:DiVA.org:ri-23893DiVA: diva2:1042971
Projects
ContikiWISENET (NES)Promos
Available from: 2016-10-31 Created: 2016-10-31

Open Access in DiVA

fulltext(1751 kB)3 downloads
File information
File name FULLTEXT01.pdfFile size 1751 kBChecksum SHA-512
85146581ea6459ae54686fcf5323fdb11dadff5ff16a9d17e39fd141a02f94c6045e89dec3d9864016d3fecbf4b875eeeae2949f707e5c709519cb38fcd6bc79
Type fulltextMimetype application/pdf

Other links

http
By organisation
SICS
Computer and Information Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 3 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: 7 hits
ReferencesLink to record
Permanent link

Direct link