To simulate Vehicular Named Data Networking (NDN) projects in OMNeT++ has needs to include to utilizing specialized frameworks and modules intended for Named Data Networking and vehicular communication. Feel free to reach out to phdprime.com, and we will assist you with comparative analysis.
Here is a step-by-step guide to help you simulate Vehicular NDN (VNDN) projects using OMNeT++:
Steps to Simulate Vehicular NDN Projects in OMNeT++
- Install OMNeT++
- Make sure that OMNeT++ is installed on the system.
- We also need to install the INET framework that is usually utilized for vehicular and wireless network simulations.
- Install and Set Up NDNsim
- To Replicate Named Data Networking (NDN), we need to install the NDNsim module, which is a fork of the ns3 network simulator with built-in NDN support.
- But, OMNeT++ doesn’t have a direct NDN implementation such as NDNsim, so we need to perform with frameworks that execute NDN over OMNeT++.
Currently, we have to either:
- Integrate NDNsim with OMNeT++ (which may require custom setup) or
- Adapt existing NDN modules in OMNeT++ or replicate NDN functionality in the application layer by creating custom packet forwarding mechanisms.
For ease, I recommend discover VANET frameworks like Veins, INET, or SimuLTE, that could be customized to support NDN-like behaviour.
- Set up VANET Environment
For vehicular networks, we need mobility models for vehicles in a city or highway environment. Install and setup a VANET simulation framework like Veins or SUMO (Simulation of Urban MObility).
- Veins are a vehicular network simulation framework built on OMNeT++ and SUMO.
- SUMO is utilized for simulating the movement of vehicles. It delivers realistic traffic data for utilize in VANET simulations.
To install Veins:
- Clone the Veins repository.
- Follow the installation instructions to incorporate Veins with OMNeT++ and SUMO.
- Model NDN Functionality
- While NDN utilize data-centric communication (where communication is based on named data rather than host IP addresses), we will required replicating data forwarding based on names (content identifiers) instead of IP addresses.
- We can execute a simple NDN forwarding logic using OMNeT++’s application layer. This involves:
- Describe content names.
- Configures Interest and Data packet structures.
- Executing content caching approaches at each node (vehicle).
- Setting up Interest/Data packet forwarding in terms of content names rather than IP routing.
- Define NDN Application Layer
- Generate an application layer module in OMNeT++ that implements NDN functionality. This will includes describing new packet types (e.g., Interest packets, Data packets) and handling them at each node (vehicle).
Example:
- Interest Packet: A request for content/data.
- Data Packet: Contains the requested content and is cached by intermediate nodes (vehicles).
In the simulation, vehicles will request and forward data (content) based on named identifiers (rather than IP addresses), reflecting the core principle of NDN.
Sample interest packet definition:
class InterestPacket : public cPacket {
std::string contentName; // Name of the content being requested
};
Sample data packet definition:
class DataPacket : public cPacket {
std::string contentName; // Name of the content
std::string contentData; // Actual content/data
};
- Configure Mobility Models for Vehicles
Utilize the SUMO traffic simulator to create realistic vehicular movement data and import it into OMNeT++ through Veins or directly using SUMO’s TraCI interface.
Example mobility configuration:
*.node[*].mobility.typename = “TraCIMobility”
*.node[*].mobility.host = “localhost”
*.node[*].mobility.port = 8813
This make sure that the vehicles move realistically in the simulation and interact based on their positions.
- Implement Caching and Forwarding Strategies
In NDN, nodes (vehicles) cache data they receive to help fulfil advanced requests from other nodes. To simulate this in OMNeT++:
- Execute caching mechanisms in the vehicular nodes to store data packets.
- Execute forwarding approaches to forward Interest packets in terms of content names such as flooding, multicast, or unicast.
Example of a basic cache in a vehicle node:
std::unordered_map<std::string, DataPacket> contentCache;
void cacheData(DataPacket data) {
contentCache[data.contentName] = data;
}
- Routing and Forwarding Logic
Execute NDN-style forwarding logic where:
- Vehicles send Interest packets to request specific content.
- If a vehicle has the requested content in its cache, it transmits back a Data packet.
- If not, the Interest packet is forwarded to other vehicles in the network.
Example logic to forward Interest:
void forwardInterest(InterestPacket interest) {
if (contentCache.find(interest.contentName) != contentCache.end()) {
sendData(contentCache[interest.contentName]);
} else {
forwardToNeighbors(interest);
}
}
- Analyse Performance
- After executing the simulation, utilize OMNeT++’s built-in result collection behaviors to measure metrics such as:
- Cache hit ratio.
- End-to-end latency for content retrieval.
- Data dissemination efficiency.
- Effects of vehicle mobility on data delivery.
Enable result collection in the .ini configuration file:
**.recordEventLog = true
**.recordScalar = true
Example .ini Configuration for Vehicular NDN:
network = VNDNNetwork
**.numVehicles = 50
*.node[*].mobility.typename = “TraCIMobility”
*.node[*].mobility.initialX = uniform(0, 1000)
*.node[*].mobility.initialY = uniform(0, 1000)
*.node[*].wlan.typename = “AdhocHost”
*.node[*].wlan.macType = “Ieee80211Mac”
*.node[*].wlan.radio.transmitter.power = 2mW
*.node[*].app.typename = “VNDNApp” # Define NDN application here
*.visualization.enabled = true
- Run the Simulation
- After configuring the simulation, execute it in OMNeT++ and envision the vehicular communication in real-time.
- Measure the outcomes to learn the performance of the VNDN system, concentrates on metrics like delay, packet loss, cache utilization, etc.
- Extend and Customize
- We can customize VNDN simulation further by executing advanced features such as:
- Content popularity-based caching.
- Diverse forwarding approaches such as hierarchical, geographic-based.
- Incorporate with other networks such as LTE, 5G for hybrid vehicular communication systems.
In this setup, we deliver the more information regarding the Vehicular Named Data Networking that were simulated using the tool of OMNeT++ and it contains the simulation procedure, example snippets and advanced extension were provided in the manual. If needed, we will provide additional details regarding this process in another manual.
