Simulation Based Performance Analysis of IEEE 802.11b Based MANETs

The IEEE 802.11b standard is a protocol for proper interconnection of data communication tool using the wireless transmission in the Local Area Network (LAN). It includes the physical and the Media Access Control (MAC) layers of the ISO seven-layer network model. Therefore, investigating its performance with different ad-hoc network environment is necessary. Previously, a number of studies investigate the performance of various routing protocols using different evaluation methods with simulators, resulting to different outcomes. Thus, 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 and compare them with real life scenario MANET network. This paper present analysis results for the performance evaluation of transmitting FTP file with AODV routing protocol in OPNET modeler and real life network for several scenarios with
802.11b wireless networking transmission method. Simulation
results demonstrate that the scenarios with small amount of fixed and mobile nodes shows better performance. The overall network performance automatically degrades with the increment of number of nodes as well as increment of packet size.