NetSim is the industry’s leading network simulation software for protocol modelling and simulation, network R & D and defence applications.
It is an end-to-end, full stack, packet level network simulator and emulator, providing network engineers with a technology development environment for protocol modelling, network R&D and military communications. The behaviour and performance of new protocols and devices can be investigated in an virtual network within NetSim at significantly lower cost and in less time than with hardware prototypes.
The Apr 19 release of NetSim (ver 11.1) rolls out exciting new features focused on enhancing usability:
Introducing Workspaces in NetSim – More freedom and flexibility
Users can group together NetSim source code, binaries, libraries, experiments and images related to one project
Export/import workspaces and export/import experiments
A single PC/VM and license can be used effectively by multiple users each of whom can independently modify the underlying source code
Building and linking your own code is now a breeze
Single click to open protocol source codes
Manual, complex and time-consuming tasks related to development environment, dependencies and compiler eliminated
Write your own code and simply build – NetSim will automatically simulate per your code
A Vehicular Adhoc Network (VANET) is a network that provides communication between moving vehicles (V2V) and infrastructure (V2I). VANETs are a rapidly emerging research topic. However, VANET field testing is extremely expensive, time-consuming and practically challenging. NetSim addresses these concerns by allowing users to
create and analyze real-world conditions within the simulator. IEEE 1609 defines the architecture and provides the standards for Wireless Access in Vehicular Environments (WAVE) that defines vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) wireless communications.
NetSim allows for VANET simulations per MAC/PHY standards defined in IEEE 802.11p, IEEE1609 WAVE and LTE.
NetSim™ – SUMO Interfacing
Simulation of IEEE 1609 WAVE based VANET Networks can be achieved by interfacing NetSim with SUMO (Simulation of Urban Mobility), an Open Source traffic simulation software. Users can model the number of vehicles, the direction and velocity of their movement, the features of the wireless network transceivers, the routing protocol,
etc. During simulation NetSim gathers data about the network to measure protocol performance. This includes application throughput, link utilization, packet delays, packet errors, packet delivery ratio etc.
Moreover, it is possible to visualize mobility & communication in VANET using NetSim animator.
These VANET simulation features would be useful to engineers & researchers working on the communications architecture for DSRC – based V2V and V2I interactions.
Other External Interfaces
MATLAB and Simulink
Wireshark for packet capture and analysis
NetSim Emulator to connect simulator to real devices
VANET Research Work-flow using NetSim™
VANET Network Stack
Basic Safety Message (BSM) Protocol as per standard J2735
Dedicated Short Range Communications (DSRC) Message
Wave Short Message Protocol (WSMP)
* WSM Transmission
* WSM Reception
* Service Requests and Channel Access Assignment
* Service Channel (SCH) and Control Channel (CCH)
IEEE 802.11p for VANET but users can also use IEEE 802.11 a/ b / g / n / ac
RF Propagation Models
* Friis Free Space Propagation
* Log Distance
* HATA Suburban, HATA Urban
* COST 231 HATA Suburban, COST 231 HATA Urban
* Indoor Office, Indoor Factory, Indoor Home
A variety of network performance metrics is reported including
Packet Delivery Ratio
IP Forwarding Table
Graphical plots over time … and more
Packet Trace: Users can log details of each packet as it flows in the network.
Event Trace: Users can log details of each event of the protocol FSM while execution of the discrete event simulation
LTE Based VANETs
VANETs based on LTE can also be simulated using NetSim. An example use-case is where vehicles use LTE to send/receive data to/from a remote server to make smart decisions regarding route planning and driving. A typical research problem would be to develop algorithms/architectures to ensure that the connection among vehicles and to the LTE infrastructure is ultra-reliable when the vehicles are moving at a high speed.
Key Research Areas
Some of the key research areas and challenges in VANETs are as under: