How to send messages on a radioMedium

[Shesha Sreenivasamurthy]

I am very new to Inet and omnet. My goal is to send messages between  myhost[0] -> myshos[1] using 802.11 radioMedium. So I have created the following files.

I have implemented simplehost.cc and simplehost.h with initialize and handleMessage function. I am missing the part where the messages should go form myhost[0] -> Medium -> myhost[1] and viceversa. Can anyone give me some suggestions ?

=========

NED

========

simple SimpleHost

{

parameters:

gates:

input in;

output out;

}

network Wireless

{

parameters:

types:

submodules:

radioMedium: Ieee80211ScalarRadioMedium;

myhosts[2]: SimpleHost;

connections:

// I don't know how to connect gates to of my simpleHost to radioMedium

}

==============

omnetpp.ini

===============

[General]

network = Wireless

description = Two hosts communicating wirelessly

[Config Ieee80211ScalarRadioMedium]

description = "802.11 radio"

[Shesha Sreenivasamurthy]

I made some progress. But still have issues ... With the following setup, The network initializes ok but when I send message, I get the following error.

<!> Unsupported command -- in module (inet::physicallayer::Ieee80211Radio) WirelessNetwork.hostA.wlan[0].radio (id=60), at t=0s, event #1

Can anyone please help me here ?

===========

NED

==========

import inet.networklayer.configurator.ipv4.Ipv4NetworkConfigurator;

import inet.physicallayer.wireless.common.contract.packetlevel.IRadioMedium;

import inet.node.inet.WirelessHost;

import inet.visualizer.canvas.integrated.IntegratedCanvasVisualizer;

import inet.physicallayer.wireless.common.contract.packetlevel.IRadio;

simple SimpleHost

{

parameters:

gates:

input in @directIn;

output out;

}

network WirelessNetwork

{

parameters:

@display("bgb=600,600");

//numWlanInterfaces = default(1);

submodules:

visualizer: IntegratedCanvasVisualizer;

configurator: Ipv4NetworkConfigurator;

// UnitDiskRadioMedium Ieee80211RadioMedium

radioMedium: <default("Ieee80211RadioMedium")> like IRadioMedium {

@display("p=263.344,135.296");

}

// radio: <default("Ieee80211Radio")> like IRadio {

// @display("p=41,74");

// }

hostA: WirelessHost {

@display("p=60,195");

}

hostB: WirelessHost {

@display("p=450,195");

}

shostA: SimpleHost {

@display("p=60,350");

}

shostB: SimpleHost {

@display("p=450,350");

}

connections:

shostA.out --> hostA.radioIn++;

shostB.out --> hostB.radioIn++;

}

===============

omnetpp.ini

==============

[General]

description = Simple sim where two host communicate wirelessly

network = WirelessNetwork

sim-time-limit = 60s

*.host*.ipv4.arp.typename = "GlobalArp"

# WLAN Configuration

*.host*.wlan[0].typename = "AckingWirelessInterface"

*.host*.wlan[0].mac.useAck = false

*.host*.wlan[0].mac.fullDuplex = false

*.host*.wlan[0].radio.transmitter.communicationRange = 500m

*.host*.wlan[0].radio.receiver.ignoreInterference = true

*.host*.wlan[0].mac.headerLength = 23B

*.radioMedium.typename = "Ieee80211RadioMedium"

*.host*.wlan[0].radio.typename = "Ieee80211Radio"

*.host*.**.bitrate = 1Mbps

# Visualizer Configuration

**.radio.displayCommunicationRange = true

*.visualizer.mediumVisualizer.displaySignals = true

*.visualizer.physicalLinkVisualizer.displayLinks = true

*.visualizer.physicalLinkVisualizer.packetFilter = "UDPData*"

*.visualizer.mobilityVisualizer.displayVelocities = true

*.visualizer.mobilityVisualizer.displayMovementTrails = true

# Add Mobility to Hosts

*.hostA.mobility.typename = "LinearMobility"

*.hostA.mobility.speed = 0.1mps

*.hostA.mobility.initialMovementHeading = 200deg

==============

SimpleHost.cc

===============

void SimpleHost::initialize()

{

msgId = 0;

printf("********** NAME %s ***********\n", getName());

printf("HAS GATES %d\n", hasGates());

vector<string> mygates = getGateNames();

for (auto i = mygates.begin(); i != mygates.end(); ++i)

printf("GATES %s\n", (*i).c_str());

if (strcmp("shostA", getName()) == 0)

{

printf("I’m host 0, sending initial message\n");

inet::cMessage *msg = new inet::cMessage("InitialMsg");

send(msg, "out");

}

}

void SimpleHost::handleMessage(inet::cMessage *msg)

{

char msgStr [32];

printf("Received message ‘%s'\n", msg->getName());

printf("********** NAME 1 %s ***********\n", getName());

if (strcmp("shostA", getName()) == 0)

{

printf("I’m host 0, sending the message\n");

sprintf(msgStr, "HOSTA-MSG-%d", msgId++);

}

else if (strcmp("shostB", getName()) == 0)

{

printf("I’m host 1, sending the message\n");

sprintf(msgStr, "HOSTB-MSG-%d", msgId++);

}

inet::cMessage *newMsg = new inet::cMessage(msgStr);

send(newMsg, "out");

delete msg;

}

[Alfonso Ariza Quintana]

You are using the 802.11 radio with a mac that doesn't support this radio.

*.host*.wlan[0].typename = "AckingWirelessInterface" # here you select the interface type (mac and radio type)

*.host*.wlan[0].radio.typename = "Ieee80211Radio"  # Now you change the radio to 802.11 radio type

---

De: omn...@googlegroups.com <omn...@googlegroups.com> en nombre de Shesha Sreenivasamurthy <she...@gmail.com>
Enviado: domingo, 28 de agosto de 2022 20:07
Para: OMNeT++ Users <omn...@googlegroups.com>
Asunto: [Omnetpp-l] Re: How to send messages on a radioMedium

 

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[Shesha Sreenivasamurthy]

Thanks Alfonso.

I want to use 802.11. Where can I find compatible interfaces (Mac) for this radio type ?

Thanks,

Shesha

On Aug 29, 2022, at 1:00 AM, Alfonso Ariza Quintana <aari...@hotmail.com> wrote:



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