To simulate Network Communication projects using OMNeT++ has needs to configure a network environment in which the different devices, protocols, and communication layers communicate. OMNeT++ is highly modular, and with frameworks such as INET, we can simulate numerous types of network communication, has contained wired, wireless, IP-based, and application-layer communication. Need simulation help then feel free to share with phdprime.com your reasech details we will help you promptly.
Here’s a step-by-step guide to simulate network communication projects using OMNeT++.
Steps to Simulate Network Communication Projects in OMNeT++
- Install OMNeT++ and Required Frameworks
- OMNeT++: Download and install OMNeT++.
- INET Framework: The INET Framework is necessary for simulating network communication in OMNeT++. It delivers a wide range of protocols, has contain TCP, UDP, IP, Ethernet, and wireless technologies (Wi-Fi, LTE, 5G).
- Understand the Network Communication Requirements
- Wired Networks: Ethernet-based communication or other wired networking technologies.
- Wireless Networks: Communication using Wi-Fi, Bluetooth, or cellular networks (LTE, 5G).
- Protocols: Describe the communication protocols (TCP, UDP, HTTP, etc.) used among devices.
- Application Layer: Replicate communication at the application level, like file transfer, web communication, etc.
- Create the Network Topology in NED
Describe the network topology using the NED (Network Description) language. This contains specifying the devices, routers, access points, and links among them. Below is an instance NED files for a simple network communication scenario:
network SimpleNetwork
{
submodules:
host1: StandardHost;
host2: StandardHost;
router: Router;
connections:
host1.pppg++ <–> EthLink <–> router.pppg++;
host2.pppg++ <–> EthLink <–> router.pppg++;
}
- StandardHost: Represents a network node (e.g., a computer or server).
- Router: Signifies a router forwarding packets among hosts.
- EthLink: An Ethernet link connecting the devices.
- Configure the Simulation Parameters in the INI File
The .ini file specifies the configuration for simulation; has contain the protocols used, network parameters, and simulation duration.
Example .ini file configuration for TCP communication between two hosts:
network = SimpleNetwork
sim-time-limit = 100s
# Host 1 sends TCP data
*.host1.numApps = 1
*.host1.app[0].typename = “TcpApp”
*.host1.app[0].localPort = 1000
*.host1.app[0].connectAddress = “host2”
*.host1.app[0].connectPort = 1000
*.host1.app[0].sendBytes = 10000B
# Host 2 receives TCP data
*.host2.numApps = 1
*.host2.app[0].typename = “TcpSinkApp”
*.host2.app[0].localPort = 1000
- TcpApp: Represents an application that sends data using TCP.
- TcpSinkApp: Denotes an application that receives data using TCP.
- connectAddress: Specifies the IP address of the destination host (in this case, host2).
- Implement Communication Protocols
OMNeT++ permits you to replicate different communication protocols, has TCP, UDP, ICMP, and HTTP. The INET framework already contains implementations of these protocols.
Example of configuring UDP communication:
*.host1.numApps = 1
*.host1.app[0].typename = “UdpBasicApp”
*.host1.app[0].destAddresses = “host2”
*.host1.app[0].destPort = 5000
*.host1.app[0].sendInterval = 1s
*.host1.app[0].messageLength = 512B
*.host2.numApps = 1
*.host2.app[0].typename = “UdpSink”
*.host2.app[0].localPort = 5000
- UdpBasicApp: Sends UDP packets to the certain destination (host2) at regular intervals.
- UdpSink: Receives UDP packets sent by host1.
- Simulate Wireless Communication
To replicate wireless communication, like Wi-Fi or LTE, we can set up the wireless interface of the hosts and the access points. Here’s how we can describe a wireless communication scenario using Wi-Fi:
Modify the NED file:
network WirelessNetwork
{
submodules:
accessPoint: Ieee80211AccessPoint;
mobileHost: WirelessHost;
connections:
mobileHost.wlanNic <–> Ieee80211Link <–> accessPoint.wlan;
}
In the .ini file, configure the wireless settings:
# Wireless settings
*.mobileHost.wlanNic.txPower = 20mW
*.accessPoint.wlan.radio.transmitter.power = 50mW
*.accessPoint.wlan.channel = 11
- Ieee80211AccessPoint: Denotes a Wi-Fi access point.
- WirelessHost: signify a mobile device capable of wireless communication.
- Run the Simulation
- Build the project: Compile the project in OMNeT++ by selecting Project > Build All.
- Run the simulation: Use Run Configurations to execute the simulation, either using the graphical interface (Qtenv) or command-line interface (Cmdenv). OMNeT++ will replicate the network communication in terms of the setup in the .ned and .ini files.
- Analyse Simulation Results
OMNeT++ creates scalar and vector files with detailed simulation results. We can measure metrics such as:
- Throughput: Total data successfully routed through the network.
- Latency: The time taken for a packet to travel from the source to the destination.
- Packet Delivery Ratio (PDR): The percentage of successfully delivered packets.
- Jitter: The variation in packet arrival time, important in real-time communication.
We can utilize OMNeT++’s built-in analysis tool Plove to envision performance data, or export the outcomes to external tools such as MATLAB or Python for further evaluation.
- Advanced Network Communication Scenarios
We can prolong network communication project by adding complexity:
- Multi-hop Networks: Replicate multi-hop communication in which data is forwarded across multiple routers.
- Network Congestion: Establish traffic congestion scenarios and learn on how different protocols manage it.
- QoS-aware Communication: Execute Quality of Service (QoS) policies that select traffic in terms of latency, bandwidth, or other factors.
- Mobile Networks: Add mobility to the hosts using OMNeT++ mobility models such as RandomWaypointMobility.
Example Project Ideas for Network Communication:
- TCP vs. UDP Performance: Replicate and relate the performance of TCP and UDP in diverse network conditions (e.g., congestion, packet loss).
- Wireless Sensor Networks (WSNs): mimic communication in a WSN in which devices transfer periodic data to a central server using low-power communication protocols.
- Real-time Video Streaming: Replicate a real-time video streaming scenario and measure the performance of protocols such as RTP and UDP in terms of latency, jitter, and packet loss.
- QoS-Aware Routing: Execute routing techniques that selects real-time traffic (e.g., VoIP) over bulk data transfer in a wired or wireless network.
As shown above, we provided the detailed complete procedures to simulate the network communication project which were implemented and analyse the outcomes using the tool of OMNeT++. Additional information with certain details on this network communication will be provided in upcoming manual.
