Role of Wireless Technology for Vehicular Network

All automobile manufacturers continue to incorporate more and more technological features into their vehicles. One of the features is wireless access. A Vehicular Ad-Hoc Network or VANET is a technology that uses moving vehicles as nodes in a network to create a mobile network. VANET turns every participating vehicle into a wireless router or node. Some measurement studies have previously been undertaken to understand feasibility of using Wi-Fi for VANET communication. Recently WiMAX is emerging as one of possible candidates for next generation mobile networks. Intelligent Transportation System (ITS) converges remote sensing and communication technologies to improve safety and to make journey enjoyable. This is now part of national strategy, for improving security, safety, efficiency and comfort, of every nation. Mobile WiMax is a suitable wireless technology for networked vehicular applications because of its mobility support at vehicular speeds and its inherent wide coverage, which minimizes rate of handover and thus data loss due to disrupted communication. Apart from vehicular mobility, terrain over which network is deployed will also impact network due to its effects on wireless signal propagation. In this paper, we analyse wireless technologies such as Wi-Fi, WiMAX, and DSRC. We will also see current scenario and problem definition in VANET. Keywords— Mobile WiMAX, WI-Fi, VANET, ITS, DSRC, V2V, V2I