ISI (Intersymbol Interference) and ICI (Intercarrier Interference) are one of the major problem in OFDM system. Here a new technique has been proposed to eliminate this problem. For this the packet format of OFDM is needed to modify. After the modification it is found that performance is better than previous one. For simulation we use Network Simulator (NS2). This simulation has been deployed in Mobile Ad-hoc Network (MANET).

Now - a - days Multi-Protocol label switching (MPLS) is the new WAN (Wide Area Network) technology which is used in routers for long distance communication. In this thesis we compare the performance and convergence time between two same topology, where one is configured with MPLS technology and other one is configured with convectional WAN technology (HDLC). MPLS carries differentiated services across the Internet through a virtual path capability between packet (label) switches. In order to simulate the result we use cisco packet tracer 5.3 and GNS3 0.7 software. Using packet tracer we...