Investigate Performance of IEEE 802.11b Using OPNET

ABSTRACT: In recent years, the research community interest has increased about wireless ad hoc networks. IEEE 802.11b standard is one of the wireless network standards which is used in such network these groups’ standards. The IEEE 802.11b standard defines the protocol and proper interconnections of data communication tools wireless local area network (LAN). It includes the physical and media access control (MAC) layers of the ISO seven-layer network model. Therefore, investigating its performance with different ad hoc network configurations is necessary. Routing protocols like AODV, DSR, TORA and OLSR are famous studies that discourse the performance evaluation of routing protocols via different evaluation methods. Various methods and simulation environments grant different outcomes. Thus, there is a need to broaden the spectrum to account for effects not taken into consideration in a particular environment. There is a need to expand the spectrum to take into consideration the effects of file size, numbers of nodes and mobility that were neglected in a specific environment. During the time of the thesis, the performance of AODV, ad hoc routing protocol in OPNET was evaluated using several scenarios. Effectiveness of this approach with 802.11b standard in various wireless ad hoc network configurations was investigated. The simulation results were analyzed and compared. In our simulation work, FTP traffic is used between a client and FTP server through other entire nodes with AODV protocol and 802.11b wireless standard. Our simulation results would also represent a situation where a MANET node can receive traffic from another node in the network. Furthermore, the nodes are randomly scattered in the network to provide the possibility of multi hop routes from the client to the server. Keywords: Mobile Wireless ad Hoc Networks, Routing Protocol, Performance Evaluation, OPNIT simulator, AODV. …………………………………………………………………………………………………………………………