الفهرس 
differences with terestrial sensors networksOnly 14 pages are availabe for public view
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Abstract
This dissertation is concerned with two contributions. The first contribution is introduced for enhancing and improving the performance of routing protocols in Underwater Wireless Sensor Networks (UWSNs) and the second contribution is concerned with modelling and verifying UWSNs routing protocols on the basis of Coloured Petri Nets (CPNs In the first contribution, an algorithm to improve the performance of the Vector-Based Forwarding (VBF) is proposed which we call a Clustering Vector-Based Forwarding algorithm (CVBF). In the proposed algorithm, the space volume of the network is divided into a number of clusters where one virtual sink is assigned to each cluster. Then, the nodes inside each cluster are allowed to communicate with themselves just to reach its virtual sink node, which in turn sends the packets to the main sink in the network. Simulation results demonstrate that the proposed algorithm reduces the energy consumption especially in dense networks, increases the packet delivery ratio especially in sparse networks, and decreases the average end-to-end delay in both sparse and dense networks. These advantages are emphasized when the algorithm is compared with four other powerful routing algorithms: VBF, Hop-by-Hop VBF (HH-VBF), Vector-Based Void Avoidance (VBVA), and Energy-Saving VBF (ES-VBF) routing protocols.