Wireless sensor networks suffer from limited power resources. Therefore, managing the energy
constraints and exploring new ways to minimize the power consumption during the operation of
the nodes are critical issues. Conventional MAC protocols deal with this problem without
considering the internal properties of the sensor nodes’ batteries. However, recent studies about
battery modeling and behaviour showed that the pulsed discharge mechanism and the charge
recovery effect may have a significant impact on wireless communication in terms of power
saving. In this thesis we propose two battery-aware MAC protocols that take benefit of these
factors to save more energy and to prolong the lifetime of the nodes/network without affecting
the throughput. In both protocols we measure the remaining battery capacity of the node and use
that measurement in the back-off scheme. The first protocol gives the nodes with higher
remaining battery capacity more priority to access the medium, while the other one provides
more medium access priority to the nodes with lower remaining battery capacity. The objective
is to investigate, through simulations, which protocol reduces the power consumption of the
nodes, improve the lifetime of the network, and compare the results with the CSMA-CA
protocol.
| Identifer | oai:union.ndltd.org:uottawa.ca/oai:ruor.uottawa.ca:10393/22656 |
| Date | January 2012 |
| Creators | Nasrallah, Yamen |
| Contributors | Mouftah, Hussein T. |
| Publisher | Université d'Ottawa / University of Ottawa |
| Source Sets | Université d’Ottawa |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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