Performance Modeling of Caution Message Delivery in VANET-A Survey and Comparison

Vehicular Ad Hoc Network applications plays an important role in improving the quality and efficiency of transportation system. To improve transportation safety vehicles exchange safety messages among them which helps to reduce accidents and chain collision. In the existing system safety messages are broadcasted using flooding technique which leads to congestion when the traffic density increases and consequently packet loss occurs In this paper we are going to study about an analytical model that helps to exchange Safety message with high performance by selecting reliable forwarder using Power-Aware Link Quality Estimation technique and compare it with the existing system .By reducing the congestion, reliability increases and delay decreases, consequently the performance of emergency message diffusion increases. The model also studies the ways to enable connectivity in dense, sparse and isolated traffic condition.