Design and implementation of wireless sensor networks utilizing sector antennas

Thesis Type: Postgraduate

Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Electrical and Electronics Engineering, Turkey

Approval Date: 2016




This thesis considers the medium access control layer (MAC) for a wireless sensor network (WSN) utilizing sector antennas. We propose a communication protocol including a neighbor discovery protocol, a routing protocol and a transmission protocol similar to ALOHA for WSNs operating with sector antennas. The main contribution to the literature is to compare the outcome of using sector antennas with using omnidirectional antennas in WSNs by both experimental studies and simulations. Experimental studies compare: - A network performing the proposed MAC protocol and utilizing sector antennas, - A network performing ALOHA and using omnidirectional antennas. On the other hand, in addition to the networks in the experimental studies, simulation studies include: - A network using omnidirectional antennas and utilizing Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) algorithm, - A network utilizing sector antennas which have 5 sectors with the proposed MAC protocol, - A network using 3 sector antennas and has 3 different Radio Frequency (RF) modules, each directing to the different sectors, in the sink node. Both the experimental studies and the simulation results are presented to demonstrate the advantages of sector antennas over omnidirectional antennas by examining packet delivery ratio and latency parameters as networks’ traffic loads are varied.