Wireless sensor networks can enable numerous advanced monitoring and control applications.
They are characterized by a need to maximize their efficiency, especially with
respect to energy consumption, since the lifetime of a sensor node has a huge impact on the
usability of a wireless sensor network. In this thesis, an energy efficient MAC protocol for
wireless sensor networks is proposed. The protocol is based on IEEE 802.11, with some
modifications to accommodate power efficiency and scalability which are the two main
design factors for wireless sensor networks. The proposed Multi-Phase MAC (Φ-MAC)
protocol uses periodic listen and sleep modes to save energy. Sensor nodes in Φ-MAC protocol
are allocated into different phases so that the listen periods of the different phases are
non-overlapping. Distributing the nodes among the phases allows the nodes to sleep longer
and conserve battery power. This distribution also effectively reduces the traffic seen by the
nodes in each phase, which reduces the probability of collisions and retransmissions. The
results of the numerical simulations show that Φ-MAC outperforms other proposed MAC
protocols in its efficiency of consuming power.
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/860 |
| Date | 10 April 2008 |
| Creators | Al-Sanad, Abdul-Elah Sanad. |
| Contributors | Gebali, Fayez. |
| Source Sets | University of Victoria |
| Detected Language | English |
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