EE 400 Term Project

A Survey of Vehicular Networks.Done by

Saif AL Mustanier ID#2264840Ali AL-Yami ID# 245786

References:• http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber• http://www.ieee802.org/11/PARs/index.html#Active• Denis Bakin; Evolution of 802.11 (physical layer)• Benjamin E. Henty; A Brief Tutorial on the PHY and MAC layers of the IEEE

802.11b Standard; July 12, 2001

Vehicular Networks (VANET)

• OUTLINE:• Definition• Application of VANET • Physical layer• Data link layer• Network layer • Transport layer

Definition of VANET• A Vehicular Ad-Hoc Network, or VANET, is a

form of mobile ad hoc network, to provide communications among nearby vehicles and between vehicles and nearest fixed equipment, usually described as roadside equipment.

• VANET using different ad-hoc networking technologies such as WiFi IEEE 802.11 b/g, WiMAX IEEE 802.16, Bluetooth, IRA, ZigBee for easy, accurate, effective and simple communication between vehicles on dynamic mobility

Source [1]

Application of VANET

• Comfort for the passenger.• Helping Driver.• Collision Avoidance.

Architecture of the VANET:

Type of the used layer • layered approach• un-layered approach

The Physical Layer:

• 1. The Physical Layer Convergence Protocol (PLCP):• provides a method for mapping the MAC sublayer protocol data units into a framing format

suitable for sending and receiving data and management.

• 2. Physical Medium Dependent (PMD):• The PMD interacts directly with the physical medium and performs the most basic

bit transmission functions of the network. It is mainly responsible for encoding and modulation

Data link layer:

• Aloha • CSMA• CSMA is an improved Aloha protocol where the transmitter

starts by sensing the channel before the transmission is initiated and only transmits if the channel is free

The Network layer

• The design of effective vehicular communications poses a series of technical challenges.

• multipath routing protocols

• vehicles are grouped according to their moving directions.

• To avoid link ruptures.

Transport Layer

• Vehicles are equipped with storage and processing devices.

• Unfortunately, studies have shown that TCP performance in VANET is very poor

• many solutions have been proposed.

• TCP variants

• entirely new transport protocols developed to replace TCP

Conclusion

• Definition• Application of VANET • Physical layer• Data link layer• Network layer • Transport layer

Thank You

I am ready to answer your questions