How to Implement Cellular Topology in OMNeT++
To implement the cellular topology in OMNeT++ has needs to include making a network that mimicking a cellular structure, where the networks are split into cells, each with a base station or cell tower that connects to mobile nodes in its range. Cellular topology is general in mobile communication networks, where each cell covers a specific geographic area, and mobile nodes can move among cells.
The following process will show how to implement a cellular topology in OMNeT++ using the INET framework:
Step-by-Step Implementations:
- Set up OMNeT++ and INET Framework
- Make sure that OMNeT++ and the INET framework are installed and correctly configured. The INET framework offers the required modules for simulating wireless communication, which is necessary for implementing a cellular topology.
- Define the Cellular Topology in a NED File
- Make a .ned file to describe the network topology. The network is divided into cells, each with a base station that manages communication with mobile node in a cellular topology.
Example:
package cellularTopologyExample;
import inet.node.inet.StandardHost;
import inet.node.inet.Router; // Used as the base station
network CellularTopology
{
parameters:
int numCells = default(3); // Number of cells in the cellular network
int numNodesPerCell = default(5); // Number of mobile nodes per cell
submodules:
baseStation[numCells]: Router {
parameters:
@display(“p=200+400*i,200”);
}
mobileNode[numCells][numNodesPerCell]: StandardHost {
parameters:
@display(“p=100+200*j+400*i,400”);
}
connections allowunconnected:
// Connect mobile nodes to their respective base stations
for i=0..numCells-1 {
for j=0..numNodesPerCell-1 {
mobileNode[i][j].wlan[0].connectTo = baseStation[i].wlan[0];
}
}
}
- In this example:
- Router is used to denotes the base stations or cell towers.
- StandardHost represents the mobile nodes within each cell.
- The mobile nodes in each cell are connected wirelessly to their corresponding base station.
- Configure the Nodes in OMNeT++ INI File
- In the omnetpp.ini file, configure the properties of the nodes, like IP addresses, mobility, and the applications they will run.
Example:
[General]
network = cellularTopologyExample.CellularTopology
# Configure IP addresses and routing
*.baseStation[*].ipv4.arp.typename = “GlobalArp”
*.mobileNode[*][*].ipv4.arp.typename = “GlobalArp”
*.mobileNode[*][*].wlan[0].ipv4.address = “10.0.0.x”
*.mobileNode[*][*].wlan[0].ipv4.netmask = “255.255.255.0”
# Mobility configuration: random waypoint model for mobile nodes
*.mobileNode[*][*].mobility.typename = “MassMobility”
*.mobileNode[*][*].mobility.bounds = “0,0,800,800”
*.mobileNode[*][*].mobility.initialX = uniform(100,700)
*.mobileNode[*][*].mobility.initialY = uniform(100,700)
*.mobileNode[*][*].mobility.speed = uniform(1,5)
# Example application setup: mobile node in one cell communicates with a node in another cell
*.mobileNode[0][0].numApps = 1
*.mobileNode[0][0].app[0].typename = “UdpBasicApp”
*.mobileNode[0][0].app[0].destAddresses = “10.0.0.6” # IP address of a node in another cell
*.mobileNode[0][0].app[0].destPort = 5000
*.mobileNode[0][0].app[0].messageLength = 1024B
*.mobileNode[0][0].app[0].sendInterval = 1s
*.mobileNode[1][1].numApps = 1
*.mobileNode[1][1].app[0].typename = “UdpSink”
*.mobileNode[1][1].app[0].localPort = 5000
- In this example:
- mobileNode[0][0] is configured to send UDP packets to mobileNode[1][1], which is in a various cell.
- By using random waypoint model, mobility is configured, mimicking movement within each cell’s area.
- Base stations are used as central points for communication within each cell.
- Configure Wireless Communication
- OMNeT++’s INET framework allows for wireless communication configuration. Make sure that wireless interfaces like wlan[0] are properly configured for the mobile nodes and base stations.
Example wireless configuration:
*.mobileNode[*][*].wlan[0].typename = “IdealWirelessInterface”
*.baseStation[*].wlan[0].typename = “IdealWirelessInterface”
*.mobileNode[*][*].wlan[0].mac.address = auto
*.baseStation[*].wlan[0].mac.address = auto
*.mobileNode[*][*].wlan[0].radio.transmitter.communicationRange = 200m
*.baseStation[*].wlan[0].radio.transmitter.communicationRange = 400m
- Wireless configuration uses IdealWirelessInterface for both mobile nodes and base stations, setting appropriate communication ranges to ensure nodes in a cell can communicate with their corresponding base station.
- Run the Simulation
- Mobility, and communication configurations, compile and run the simulation in OMNeT++ after setting up the network topology. We should see mobile nodes moving within their cells, communicating with their corresponding base stations.
- Analyze the Results
- To visualize and analyse the network traffic by using OMNeT++’s built-in tools. Observe how data is transmitted between mobile nodes and base stations, how the network handles traffic as nodes move between cells, and how mobility affects communication.
- Enhancements and Variations
- Handover Mechanism: Execute a handover mechanism where mobile nodes switch base stations as they move from one cell to another.
- Traffic Analysis: Calculate the performance of the network in terms of throughput, latency, and packet loss under various traffic conditions and mobility patterns.
- Interference and Noise: Mimic interference and noise in wireless communication to learn its impact on the cellular network.
Example Files
- CellularTopology.ned: Describes the cellular topology.
- omnetpp.ini: Encompasses configuration settings for the simulation.
In the end, we had to give more message about mimicking a cellular structure, to define cellular topology in NED file, wireless communication and some example files to execute Cellular Topology in OMNeT++ tool.
We provide help with both implementation and simulation for all aspects of Cellular Topology in the OMNeT++ program. Our team focuses on all mobile communication networks that relate to your project. Check out our top project ideas as we share the best topics on Cellular Topology.