Scenario design:

In order to initiate the simulation of a scenario in a project first of all a scenario must be created. OPNET can manage the scenarios in an excessive level, whichindicates that OPNET can easily create a new scenario, can easily manage that scenario and can also easily duplicate the scenario. Especially in this project eight scenarios are considered for simulation and the detailed designing is discussed in the following sections. As discussed in the introduction chapter, this project application is simulated with a significant aim to compare the performance of TCP against the performance of CBR with the utilization of few parameters and these parameters are fixed that is 200 mobile nodes are used for the simulation across the 500X500 meters of capacity area. The following sections explain all the eight scenarios that are simulated to achieve the aim of the project:

Scenario 1:

This is the first scenarios and the generation of TCP traffic across the MANET is done using certain simulation setup. Initially a blank scenario is created for the network campus and this is considered as the MANET model. A 500X500 meters area is considered as the capacity area in this project the screen shots representing these are appended with the appendix section. The objects required for the scenario that are taken from the object palette are dragged and dropped in the work station and the objects required are Application configuration, mobile configuration, profile configuration, mobile wireless LAN workstations and a fixed wireless LAN server.

                   The usual process of simulating this scenario uses all these objects and these objects setup is described later in the next chapter. The appendix section is attached with the screen shots that explain the entire procedure of using these objects. This scenario is regarded as a different scenario when compared with the other scenarios because of the traffic type and application type used. The nodes used in the scenario possess mobility character and FTP application is used across for sending the TCP traffic. The other changes made are configuration of nodes, configuration of server, application configuration and profile configuration. Few parameters are used for doing the configuration for the development of scenario simulation and the parameters are:

  • 200 mobile nodes are taken as the number of nodes
  • Campus is taken as the network scale
  • 500X500 meters is the size of the network
  • MANET model is used as the model family
  • AODV is the routing protocol used
  • FTP is the application used
  • TCP is traffic sent
  • Tahoe is the parameter of TCP

                        All the above parameters are necessary for the simulation of scenario 1 and these are explained further in the further chapters. As discussed earlier the application is added with the server, 200 mobile nodes, mobile configuration, application configuration and profile configuration. AODV routing protocol is used in this particular scenario for evaluating the TCP traffic performance throughout the MANET. The results obtained from the simulation of this scenario are analyzed in the results explanation chapter.

This paper is written and submitted by Sujana Priya V.