Network CSMAMac

This example shows how to use MiXiMs CSMA protocol implementation.

The network consists of a number of hosts which represent some kind of switches and a number of hosts which represent clients. At first they build up their routing tables by sending, forwarding (only switches), receiving and evaluating "Hello World" messages. After that phase the clients start randomly "jabbering" with other hosts and the switches only forward the "Jabber" messages to their destination.

The phy layer uses only "SimplePathlossModel" as AnalogueModel and "SNRThresholdDecider" as Decider.

The omnetpp.ini contains the following configurations:

• "General" - three clients in range of each other, no switch, no propagation delay
• "WithoutPropDelay" - four clients and two switches whereas the switches are in range of each other and the clients are in range of at least one switch, no propagation delay
• "WithPropDelay" - same but with propagation delay
• "CollissionMac" - same configuration but the parameters for the CSMAMacLayer lead to more collisions
• "Perftest" - used with CmdEnv for performance testing (time limited)

Usage diagram:

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Inheritance diagram:

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Parameters:

Properties:

Unassigned submodule parameters:

Source code:

//
//This example shows how to use MiXiMs CSMA protocol implementation.
//
//The network consists of a number of hosts which represent some kind of switches
//and a number of hosts which represent clients. At first they build up their
//routing tables by sending, forwarding (only switches), receiving and
//evaluating "Hello World" messages. After that phase the clients start randomly
//"jabbering" with other hosts and the switches only forward the "Jabber"
//messages to their destination.
//
//The phy layer uses only "SimplePathlossModel" as AnalogueModel and 
//"SNRThresholdDecider" as Decider.
//
//The omnetpp.ini contains the following configurations:
//
//- "General" 			- three clients in range of each other, no switch, no 
//						  propagation	delay
//- "WithoutPropDelay" 	- four clients and two switches whereas the switches are
//						  in range of each other and the clients are in range of at
//						  least one switch, no propagation delay
//- "WithPropDelay"		- same but with propagation delay
//- "CollissionMac"		- same configuration but the parameters for the CSMAMacLayer
//						  lead to more collisions
//- "Perftest"			- used with CmdEnv for performance testing (time limited)
//
network CSMAMac
{
    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)
        double numHosts; // total number of hosts in the network

        @display("bgb=$playgroundSizeX,$playgroundSizeY,white,,;bgp=10,50");
    submodules:
        world: BaseWorldUtility {
            parameters:
                playgroundSizeX = playgroundSizeX;
                playgroundSizeY = playgroundSizeY;
                playgroundSizeZ = playgroundSizeZ;
                @display("p=100,0;i=misc/globe");

        }
        connectionManager: ConnectionManager {
            parameters:
                @display("p=200,0;b=42,42,rect,yellow,,;i=abstract/multicast");

        }
        node[numHosts]: PhyMacHost {
            parameters:
                numHosts = numHosts;
                @display("p=50,50;b=42,42,rect,yellow,,;i=device/wifilaptop");

        }
    connections allowunconnected:
                         // all connections and gates are to be generated dynamically

}

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