Certain investigations on the hybrid methodologies for improving the performance in vehicular ad hoc networks

Abstract

Vehicular Ad Hoc Network (VANET) is a wireless network designed to provide safety, comfort, and other information needed by the drivers. VANET is an emerging technology with many innovative ideas to handle the vehicle traffic and road safety efficiently. Some of the key components governing VANET are Vehicle nodes, Smart Infotainment Devices, Global Positioning System, sensors, Road Side Units, and transceivers. USA 802.11p is the specific standard administering the vehicular communication systems in an intelligent manner, which is also called as Wireless Access in Vehicular Environments (WAVE) that potentially covers two modes of communication: Vehicle to Vehicle (V-V) and Vehicle to Infrastructure (V-I). One of the major issues with the VANET technology is the control of transmission data rate in the highly mobile and dynamic vehicular communication systems. Rate control algorithm or rate adaptation techniques provide adequate transmission data rate by assessing the channel conditions. This plays an important role in IEEE 802.11 wireless network and is widely used for static residential and enterprise network scenarios. Rate control algorithm assesses the channel condition to adjust the data transmission rate. Rate control algorithms are based on two factors namely Signal to Noise Ratio (SNR) and statistical count. Some of the SNR based rate control algorithms are Receiver Based Auto Rate (RBAR), Opportunistic Auto Rate Media Access Protocol (OAR), and Rate Adaptive Framing (RAF). newline