Band coverage in wireless sensor networks

• Main Author: Hee, Shi Cheng
• Other Authors: Xiao Gaoxi
• Format: Final Year Project
• Language: English
• Published: 2018
• Subjects: DRNTU::Engineering
• Online Access: http://hdl.handle.net/10356/75291
• Institution: Nanyang Technological University

WSNs are used to monitor conditions of the surroundings that the network is covering, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively transmit the recorded data to the base station. The base station acts like an interface between users and the network, where one can retrieve required information from the network by injecting queries and gathering results. A WSN contains a huge number of sensor nodes that communicate among themselves using radio signals. These nodes are often cited as a much-needed source of improvement should WSN achieve greater usage, with limited processing speed, storage capacity, and communication bandwidth often a major problem. In this project, we propose a new scheme that utilizes the sleep-wakeup mechanism more often used by Barrier Coverage and termed the new scheme as Band Coverage to address the limited resources that the nodes can afford. Band Coverage will be evaluated for it performance and fault tolerance level using those of Barrier Coverage scheme as benchmark and comparison. This would be done using repeated simulations in Matlab. The results are heavily in favor of Band Coverage being able to achieve 1-barrier coverage consistently without the need of extra programming to ensure the above condition, which is often necessary for implementation of Barrier Coverage. The fault tolerance level of Band Coverage is shown to be far superior to that of Barrier Coverage as well, reliably covering up for any faulty nodes upon activation. Further studies however is needed to monitor the energy efficiency for each node due to the difference in number of nodes being active in each band at different time intervals, potentially resulting in more nodes consuming more energy to cover the area than others.