How to Implement Small Cell Nets in OMNeT++
To implement small cell networks in OMNeT++ has encompasses to generate a network of small cell base stations that delivers localized cellular coverage that commonly in dense urban areas or indoor environments and the small cells can be interconnected to a central base station or a core network through backhaul links. The given the below are the procedures on how to implement small cell networks in OMNeT++.
Step-by-Step Implementation:
Step 1: Set Up the OMNeT++ Environment
Make sure that OMNeT++ and essential models, like INET or Simu5G (for 5G networks), are installed and configured properly.
Step 2: Define the Small Cell Base Station (SCBS)
Small cell base stations (SCBS) are the key modules of the small cell network that state a module that denotes these stations.
Example Small Cell Base Station Module
module SmallCellBaseStation
{
gates:
inout backhaul; // Gate for connecting to backhaul
inout wireless; // Gate for wireless communication with UEs
}
Step 3: Define User Equipment (UE)
State user equipment (UE) that will connect to the small cell base stations.
Example UE Module
module UserEquipment
{
gates:
inout wireless; // Gate for wireless communication with SCBS
}
Step 4: Create the Small Cell Network
Now, state a network that contains the multiple small cell base stations and user equipment. These small cells can be linked to a central base station or a core network through a backhaul link.
Example Small Cell Network Definition
network SmallCellNetwork
{
submodules:
scbs1: SmallCellBaseStation;
scbs2: SmallCellBaseStation;
scbs3: SmallCellBaseStation;
ue1: UserEquipment;
ue2: UserEquipment;
ue3: UserEquipment;
router: Router;
core: CoreNetworkNode;
connections allowunconnected:
scbs1.backhaul <–> EthernetCable <–> router.ethg++;
scbs2.backhaul <–> EthernetCable <–> router.ethg++;
scbs3.backhaul <–> EthernetCable <–> router.ethg++;
router.ethg++ <–> EthernetCable <–> core.backhaul++;
ue1.wireless <–> IdealWirelessLink <–> scbs1.wireless;
ue2.wireless <–> IdealWirelessLink <–> scbs2.wireless;
ue3.wireless <–> IdealWirelessLink <–> scbs3.wireless;
}
Step 5: Configure Wireless Parameters
Setup the wireless communication parameters, like transmission power, data rates, and channel frequencies, to emulate the realistic wireless communication.
Example Configuration in the .ini File
network = SmallCellNetwork
sim-time-limit = 100s
# Wireless communication parameters
*.ue*.wireless.transmissionPower = 20mW
*.ue*.wireless.dataRate = 100Mbps
*.ue*.wireless.carrierFrequency = 2.5GHz
*.scbs*.wireless.transmissionPower = 100mW
*.scbs*.wireless.dataRate = 1Gbps
*.scbs*.wireless.carrierFrequency = 2.5GHz
# Backhaul link parameters
*.scbs*.backhaul.datarate = 1Gbps
*.router.ethg*.datarate = 1Gbps
*.core.backhaul.datarate = 10Gbps
Step 6: Define Traffic Patterns
To mimic the network, state traffic patterns where the UEs interact with each other or with the core network via the small cell base stations.
Example Traffic Configuration
# Traffic generation at UEs
*.ue1.numApps = 1
*.ue1.app[0].typename = “UdpBasicApp”
*.ue1.app[0].destAddress = “10.0.0.1” # Core network address
*.ue1.app[0].destPort = 5000
*.ue1.app[0].messageLength = 1024B
*.ue1.app[0].sendInterval = exponential(1s)
*.ue2.numApps = 1
*.ue2.app[0].typename = “UdpBasicApp”
*.ue2.app[0].destAddress = “10.0.0.1” # Core network address
*.ue2.app[0].destPort = 5000
*.ue2.app[0].messageLength = 1024B
*.ue2.app[0].sendInterval = exponential(1s)
Step 7: Implement Handover Logic (Optional)
In scenarios where UEs move among the coverage areas of various small cells to apply the handover logic is vital. We can either use existing handover mechanisms that delivered by frameworks such as Simu5G or implement custom logic.
Step 8: Run the Simulation
Compile and execute the simulation. We need to observe how UEs interact with the small cell base stations, how traffic is transmitted via the backhaul to the core network, and evaluate the parameters like throughput, latency, and packet loss.
Step 9: Analyse the Results
To assess the performance of the small cell network using OMNeT++’s analysis tools. We can measure the metrics such as signal strength, handover success rates, throughput, and latency.
Step 10: Extend the Simulation (Optional)
We can expand the simulation by adding more complex features like interference modelling, cutting-edge handover techniques, and varying network loads.
In the final, we all learn and get knowledge about the small cell networks that is used to make the localized cellular coverage that was implemented in OMNeT++ simulation tool. We will elaborate on the small cell networks that applied in diverse simulation instances.
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