General Monitoring of Observational Units in the Arctic Tundra
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https://hdl.handle.net/10037/21485Åpne
(PDF)
Zip-file containing the source code for the thesis project. (Ukjent)
Dato
2021-05-15Type
MastergradsoppgaveMaster thesis
Forfatter
Karlstrøm, Erlend MelumSammendrag
Climate change is going to change what we know about the arctic tundra.
Patterns in the behavior of the wildlife that lives there are predicted to undergo
a shift, and it will therefore be important to have reliable sources of empirical
data, so that we can understand how these developments are playing out. The
arctic tundra is remote and difficult to deploy sensing instruments on, and
signal coverage is unreliable.
Finding a way to monitor them reliably from a distance is needed.
This thesis describes how a prototype for a Wireless Sensor Network was
designed, implemented, and tested, with the aim of connecting Observational
Units together in a local cluster, and cooperate amongst themselves to propagate
monitoring data to external servers.
The system was designed so that nodes can dynamically discover neighboring
nodes within their range, and gossip knowledge about where sinks are in the
network. Sinks are nodes which have managed to establish a link with an
external server, and the paths to these sinks are spread across the network.
Such that if only node in the entire cluster is a sink, then data from every node
has a path outside of the cluster.
Results from running validation shows that the implemented prototype func-
tions as intended, but experiments have revealed apparent weaknesses. The
number of paths which are shared in gossiping shows an exponential growth
when the number of nodes in a cluster grows linearly. The experiments into
bundling and monitoring-data propagation shows that combining data together
causes a reduction in these types of transmissions by a factor equal to that
of the number of data fragments which are combined, however the Partial
Bundle Policy measure to increase throughput for fringe nodes has unexpected
consequences.
The prototype system works as intended per the design. We have found however
that the system is not scalable due to the extent of the accumulated path
knowledge. Suggestions for avenues to address this has been outlined in the
discussion chapter. There is a need to explore how something similar to this
prototype would look and perform in a real-life deployment on the arctic
tundra.
Forlag
UiT Norges arktiske universitetUiT The Arctic University of Norway
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