Repeatable experiments with mobile nodes in a relocatable WSN testbed
2011 (English)In: Computer journal, ISSN 0010-4620, E-ISSN 1460-2067, Vol. 54, no 12, 1973-1986 p.Article in journal (Refereed) Published
Many sensor network application scenarios include mobile nodes, such as a moving sink. Evaluatingsuch applications in a testbed is challenging since the testbed has to support mobile nodes. Wepresent Sensei-UU, a sensor network testbed that supports mobile sensor nodes. The testbedis inexpensive, relocatable and possible to reproduce by other researchers. Its primary designobjectives are to support experiments with repeatable mobility and to support relocating thetestbed deployment to different locations. Mobile sensor nodes are carried by robots that usefloor markings for navigation and localization. The testbed can be used to evaluate applicationsin which sensor nodes move in the order of meters rather than millimeters, e.g., when a humancarries a mobile phone that collects data while passing stationary sensor nodes. To investigate therepeatability of robot movements, we measure the achieved precision and timing of the robots, andfind that our robot localization is accurate to ±1 cm. Furthermore, we investigate variations inradio signal strengths between mobile and stationary nodes. We study the impact of imprecisemovements, external sources of interference, and environmental influences. We conclude thatSensei-UU supports experiments in which these variations are acceptably low to capture small-scalefading phenomena in IEEE 802.15.4.
Place, publisher, year, edition, pages
2011. Vol. 54, no 12, 1973-1986 p.
Computer Engineering Signal Processing
Research subject Computer Science with specialization in Computer Communication; Electrical Engineering with specialization in Signal Processing
IdentifiersURN: urn:nbn:se:uu:diva-151814DOI: 10.1093/comjnl/bxr052ISI: 000298386300005OAI: oai:DiVA.org:uu-151814DiVA: diva2:411418