Vehicular Adhoc Networks (VANET) Specifications

Overview

NetSim is a discrete event simulator covering a broad range of wired, wireless, mobile and sensor networks. It comes with a simple and user friendly GUI which features drag and drop functionality for devices, links, application etc. The specifications for the VANET module in NetSim v10 are –

  • Design network, simulate and observe the performance of VANET network using NetSim GUI, per Wireless Access for Vehicular Environments (WAVE) covering
    • IEEE 1609
    • 802.11 p
    • SAE standard J2735
  • Facility to conduct various experiments for differing input / output parameters
    • Input: Transmitter Power, Antenna Gain, Antenna Height, Frequency Band, Bandwidth, ED Threshold, Standard Channel SCH, Standard Channel CCH.
    • Output: Routing Overhead, Delay, Packet Delivery ratio, Routing Time.

IEEE 1609

  • Resource Manager – IEEE 1609.1
  • Network and Transport Services – IEEE 1609.3
  • Multi-Channel Co-ordination – IEEE 1609.4

Application Layer

Basic Safety Message (BSM) Protocol as per standard J2735 Dedicated Short Range Communications (DSRC) Message Transport Layer

  • Wave Short Message Protocol (WSMP)
    • WSM Transmission
    • WSM Reception
    • Service Requests and Channel Access Assignment
    • Service Channel (SCH) and Control Channel (CCH)
  • Network Layer
    • IPv4
    • Routing Protocol
    • DSR
    • AODV
    • ZRP
    • OLSR

MAC Layer

  • Primary Protocol: IEEE1609
    • Channel Coordination
    • Channel Routing
    • Channel Access Assignment
  • Secondary Protocol: IEEE802.11
  • Control Channel Time (CCH_Time): 0 – 1000000 micro sec
  • Service Channel Time (SCH_Time): 0 - 1000000 micro sec
  • Guard Time: 0 – 1000 micro sec
  • Protocol for QoS: IEEE802.11e
  • RTS Threshold: 0 – 8000 bytes
  • Rate Adaptation Technique: Generic and Minstrel

PHY Layer –

  • Primary Protocol: IEEE1609
  • Secondary Protocol: IEEE802.11 a / b / g / n / ac / p
  • Protocol Standard: By default IEEE802.11p for VANET but user can use other standards also like IEEE802.11 a/b/n/ac as per requirement
  • Frequency Band: 5 GHz
  • Channel Bandwidth: 10 MHz
  • Standard Service Channels: 36_5180 to 64_5320 MHz
  • Standard Control Channel: 36_5180 to 64_5320 MHz
  • Transmission Type: OFDM
  • Slot Time: 9 micro sec

RF Propagation Models

  • Path Loss
    • Friis Free Space Propagation (Default option in GUI)
    • Log Distance
    • HATA Suburban, HATA Urban
    • COST 231 HATA Suburban, COST 231 HATA Urban
    • Indoor Office, Indoor Factory, Indoor Home
  • Shadowing Model
    • Constant
    • Lognormal
  • Fading Model
    • Rayleigh
    • Nakagami

Interface with SUMO for Road Traffic Simulation using TRACI API’s

  • Mobility as per SUMO

Protocol source C codes available for user modification

Output Performance Metrics: A variety of network performance is reported including

  • Network Metrics
  • IEEE802.11_Metrics
  • AODV / DSR Metrics
  • IP metrics, TCP / UDP Metrics etc
  • IP Forwarding Table
  • Dynamic metrics (Graphical plot of an attribute over time) is available for application throughputs

Detailed Packet Trace: Users can log details of each packet as it flows in the network.

Detailed Event Trace: Users can log each event of the protocol FSM while execution of the discrete event simulation

Command Line Interface

  • CLI mode of running for more concise and powerful means of control
  • Facilitates use of automated scripts for running batch simulations
  • Model network configurations using XML based configuration files

MATLAB Interface: NetSim can be interfaced with MATLAB offline or online (run-time)

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. This standard provides the foundation for a broad range of applications in the transportation environment, including vehicle safety, automated tolling, enhanced navigation, traffic management and many others.

Simulation of WAVE based VANET Networks can be achieved by interfacing NetSim with SUMO (Simulation of Urban Mobility), an Open Source traffic simulation software. NetSim handles simulation of the WAVE wireless network communication between the vehicles, while road traffic conditions can be modeled conveniently in SUMO.

NetSim Technology Support

  • Wireless Access for Vehicular Environments (WAVE) using 802.11p and IEEE 1609 which covers Resource Manager – IEEE 1609.1, Network and Transport Services – IEEE 1609.3, and Multi-Channel Co-ordination – IEEE 1609.4.
  • Basic Safety Message (BSM) Protocol as per SAE standard J2735 Dedicated Short Range Communications (DSRC) Message
  • Transport Layer - Wave Short Message Protocol (WSMP) including WSM Transmission, WSM Reception, Service Requests and Channel Access Assignment, Service Channel (SCH) and Control Channel (CCH)
  • WAVE MAC - Channel Coordination, Channel Routing, Channel Access Assignment
  • VANET simulations can also be visualized over maps since NetSim supports layering of Openstreetmaps
  • At the end of the simulation, NetSim will provide a set of detailed network performance metrics, link &application throughput plots and options for drill down into packet trace and event trace.

These VANET simulation features would be useful to engineers & researchers working on the communications architecture for DSRC - based V2V and V2I interactions.

LTE Based Vehicular Networks: VANET simulations based on LTE which is achieved by interfacing NetSim with SUMO. Road traffic conditions are modeled in SUMO and NetSim takes care of the network communication part. Vehicle mobility can be modeled along roads and per traffic signals. For more information see how-to-perform-vehicular-network-simulations-using-netsim-lte-library-