Ultra Wideband transmission technique is supposed to be a promising candidate for fixed and mobile ad-hoc networks in short range scenarios. Ad-hoc networks are characterized by a lake of infrastructure, thus routing protocols are needed to establish connections between nodes. This thesis presents a performance analysis and evaluation for different routing protocols: On-Demand Distance Vector Routing protocol (AODV), Dynamic Source Routing protocol (DSR), Destination-Sequenced Distance Vector (DSDV), and No Ad-hoc routing protocol (NOAH), considering two realistic scenarios. These scenarios were simulated using NS-2 with a 802.15.4a physical layer. The first scenario denoting a production line in a factory shows that the static routing protocol NOAH outperforms all protocols on the basis of packet delivery ratio and received throughput. In the second scenario designating a mobile ad-hoc network, routing protocols were compared in terms of packet delivery ratio, end-to-end delay and normalized routing load in different environments, in order to observe the influence of the network size, network load, and nodes mobility. Simulation results showed that DSR has performed well on the basis of packet delivery ratio while AODV has performed better in terms of average end-to-end delay. For normalized routing load we found that DSDV routing protocol is more stable than AODV and DSR.

The aim of our work was to study and evaluate the performance of a wireless system associated with UWB. For this purpose, many scenarios were considered and simulated using Network Simulator NS-2. After introducing our work, we discussed in Chapters 1 and 2 the basic UWB characteristics. In addition, a brief overview of NS-2 and routing protocols was presented in Chapter 3. Later on, in Chapter 4, we showed that a network with private acquisition preamble achieve higher throughput than a network with common acquisition preamble. Then, a comprehensive study for a line scenario was provided. Simulation results showed that the static routing protocol NOAH outperforms AODV, DSDV and DSR. After that, we presented a detailed performance comparison of important routing protocols for mobile ad hoc wireless networks, using a variety of workload such as mobility, load and size of the ad-hoc networks. There was not a clear dominance of one protocol over the others. Some routing protocols were likely to perform best for some metrics, while others perform better for different metrics.