NS3 network simulator:
- NS3 network simulator is a discrete event simulator that used to simulate internet systems. It is mainly developed to focus research and educational purpose. The main aim of NS3 network simulator is to develop a environment for simulation to network.
- The ns3 simulation helps to simulate realistic models which in turn it can be used as a emulators.NS3 supports both IP and Non-IP based simulations.
Ns3 network Simulator Features:
2. No memory waste in IPv4 for node creation.
3.Mobility of the node may or may not be defined.
4.Cross layer features are available
Ns3 Simulator Example:
With the help of the point to point helper object we can create the network topology. with the help of this object we can set the data rate and the transmission delay of the channel.
pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("10Mbps"));
pointToPoint.SetChannelAttribute ("Delay", StringValue ("4ms"));
Once after the topology is designed we need to design device container, Ipv4 address for each node , Simulation start and ending time of the network.
To write a simple ns3 code :
The code starts with the following header files
All the ns3 library files are present in a folder called ns3 so during run time in order to avoid name collision all the header files included are written along with the root directory path as
To find the logging details of ns3 details of ns3 NS_LOG_COMPONENT_DEFINE module is used. The general syntax for the
example is the logging component that helps us to disable or enable message logging by taking that name as a reference.
int main(int argc,char *argv) represents the starting of the main function.
Node container class is used to create nodes.The syntax to create node is given by
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