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What is Ned File in OMNeT++

         Let’s us take a look into this article “what is Ned file in OMNeT++” which depicts the major functions about Ned file in OMNeT++.

         The network description is denoted as the NED and it is considered as the topology description language of OMNeT++. Ned includes the simple process to define the regular topologies and structures such as.

  • Tree
  • Hypercube
  • Mesh
  • Ring
  • Chain

        For instance, our technical professionals have highlighted the sample code for the creation of VANET based simulation topology.

package org.car2x.veins.nodes;

import org.car2x.veins.base.connectionManager.ConnectionManager;

import org.car2x.veins.base.modules.BaseWorldUtility;

import org.car2x.veins.modules.mobility.traci.TraCIScenarioManager*;

import org.car2x.veins.modules.obstacle.ObstacleControl;

import org.car2x.veins.modules.world.annotations.AnnotationManager;

import org.car2x.veins.nodes.Car;

import org.car2x.veins.visualizer.roads.RoadsCanvasVisualizer;

network Scenario

{

    parameters:

        double playgroundSizeX @unit(m); // x size of the area the nodes are in (in meters)

        double playgroundSizeY @unit(m); // y size of the area the nodes are in (in meters)

        double playgroundSizeZ @unit(m); // z size of the area the nodes are in (in meters)

        @display(“bgb=$playgroundSizeX,$playgroundSizeY”);

    submodules:

        obstacles: ObstacleControl {

            @display(“p=240,50”);

        }

        annotations: AnnotationManager {

            @display(“p=260,50”);

        }

        connectionManager: ConnectionManager {

            parameters:

                @display(“p=150,0;i=abstract/multicast”);

        }

        world: BaseWorldUtility {

            parameters:

                playgroundSizeX = veins_eval_by_version(veins_omnetpp_buildnum(), “playgroundSizeX”, 1525, “parent.playgroundSizeX”);

                playgroundSizeY = veins_eval_by_version(veins_omnetpp_buildnum(), “playgroundSizeY”, 1525, “parent.playgroundSizeY”);

                playgroundSizeZ = veins_eval_by_version(veins_omnetpp_buildnum(), “playgroundSizeZ”, 1525, “parent.playgroundSizeZ”);

                @display(“p=30,0;i=misc/globe”);

        }

        manager: TraCIScenarioManagerLaunchd {

            parameters:

                @display(“p=512,128”);

        }

        roadsCanvasVisualizer: RoadsCanvasVisualizer {

            @display(“p=300,0”);

        }

        node[0]: Car {

        }

 

    connections allowunconnected:

}

Ned Code for VANET Topology

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