How to Implement Network Backhaul in OMNeT++
To implement the network backhaul in OMNeT++, we have to simulate the portion of the network which links the access points (example: base station or cell towers) to the core network. It is usually a high-capacity network that carries accumulated traffic from multiple access points to the core network.
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In below, we offered the approach that helps you implement it in OMNeT++:
Step-by-Step Implementation:
Step 1: Set Up the OMNeT++ Environment
Make certain that OMNeT++ and essential libraries like INET or Simu5G (for 5G networks), are properly installed and configured.
Step 2: Define the Network Components
Begin by generating the essential elements like base stations, routers, and the core network.
Example Network Components
// Define the Base Station (BS)
module BaseStation
{
gates:
inout backhaul;
}
// Define the Core Network Node
module CoreNetworkNode
{
gates:
inout backhaul[];
}
Step 3: Create the Backhaul Network
State the backhaul network that links the base station to the core which is usually encompasses creating the backhaul links, which could be fiber-optic, microwave, or other high-capacity links.
Example Backhaul Network Definition
network BackhaulNetwork
{
submodules:
bs1: BaseStation;
bs2: BaseStation;
bs3: BaseStation;
router: Router {
gates:
ethg[3]; // Allow connection to multiple base stations
}
core: CoreNetworkNode;
connections allowunconnected:
bs1.backhaul <–> EthernetCable <–> router.ethg[0];
bs2.backhaul <–> EthernetCable <–> router.ethg[1];
bs3.backhaul <–> EthernetCable <–> router.ethg[2];
router.ethg++ <–> EthernetCable <–> core.backhaul++;
}
Step 4: Implement Backhaul Routing Logic
In a backhaul network, routing logic is typically executed in the router or aggregation node, which collects traffic from different base stations and forwards it to the core network.
Example Routing Logic
You can use the INET frameworkâs existing routing protocols or execute custom logic.
network = BackhaulNetwork
sim-time-limit = 100s
# Assign IP addresses
*.bs*.backhaul.ipv4.address = “10.0.0.x” # x represents the BS number
*.router.ethg*.ipv4.address = “10.0.0.x” # x corresponds to the interface number
*.core.backhaul.ipv4.address = “10.0.1.1”
# Define routing table entries
*.router.ipv4.routingTable[0].destAddress = “10.0.1.0”;
*.router.ipv4.routingTable[0].netmask = “255.255.255.0”;
*.router.ipv4.routingTable[0].gateway = “10.0.1.1”;
*.router.ipv4.routingTable[0].interfaceName = “ethg++”;
Step 5: Define Traffic Flows
Describe traffic flows amongst the base stations and the core network by simulating the backhaul network. It can accomplished by using applications like TCP or UDP traffic generators.
Example Traffic Definition
# Define traffic generation at the base stations
*.bs1.numApps = 1
*.bs1.app[0].typename = “UdpBasicApp”
*.bs1.app[0].destAddress = “10.0.1.1”
*.bs1.app[0].destPort = 5000
*.bs1.app[0].messageLength = 1024B
*.bs1.app[0].sendInterval = exponential(1s)
*.bs2.numApps = 1
*.bs2.app[0].typename = “UdpBasicApp”
*.bs2.app[0].destAddress = “10.0.1.1”
*.bs2.app[0].destPort = 5000
*.bs2.app[0].messageLength = 1024B
*.bs2.app[0].sendInterval = exponential(1s)
*.bs3.numApps = 1
*.bs3.app[0].typename = “UdpBasicApp”
*.bs3.app[0].destAddress = “10.0.1.1”
*.bs3.app[0].destPort = 5000
*.bs3.app[0].messageLength = 1024B
*.bs3.app[0].sendInterval = exponential(1s)
Step 6: Run the Simulation
Compile and run the simulation. Observe the network performance to see how the traffic from the base stations is accumulated and forwarded over the backhaul to the core network.
Step 7: Analyze the Results
Once the simulation is completed, analyze the results using OMNeT++’s tools. You can assess metrics like latency, throughput, and packet loss across the backhaul network to estimate its performance.
Step 8: Extend the Simulation (Optional)
Depending on the objectives, you can extend the simulation by attaching more difficult routing protocols, simulating various backhaul technologies (e.g., microwave, satellite), or introducing failures and recovery mechanisms.
In conclusion, we will walk you through the initialization and simulation process to implement the Network Backhaul using INET framework in OMNeT++ with some samples. Whenever you need any details of this, we will offer it.