Design and Performance Analysis of a New Priority-based Routing Protocol for Wireless Sensor Networks

By means of developing technology, it is possible to design sensor nodes with suitable prices, in small sizes, with low fault rates, containing more than one sensor and with high processing and transmitting capabilities. Wireless networks are built through thousands of combined sensor nodes which can sense, calculate and transmit.As wireless sensor networks are low cost and composed of multi-functional nodes, they are usually used in wide regions where access is difficult. It is important that they are able to sense and transmit for a long time without having any maintenance or adjustment with limited energy sources.One of the most important problems of wireless sensor networks is routing problem. Special protocols for the wireless sensor networks are required to be designed because of its own characteristics. Wireless sensor networks consisted of hundreds of nodes generate a great deal of data at a unit time. Because of situations like blockage while transmitting the huge generated data, not being able to deliver more important data in time or unable to deliver the data at all may emerge as a serious problem while insignificant data are delivered to the receiver. When high priority data with high packet delivery rates and the low expected delay cannot be transmitted, both material and spiritual losses are experienced in cases such as natural disasters which need urgent measures.In this thesis, a new routing protocol PBBR? (Priority Beaconless Based Routing) was designed which was determined by the source node wireless sensor networks and aimed delivering all data to the receiver as well as providing a better service for high priority data. The performance of the designed