A Method for controlling congestion in VANET

Abstract

Due to the availability of multiple sensing units on a single radio board of the modern VANET nodes, some sensor networks need to handle heterogeneous traffic within the same application. This numerous traffic may have completely different priorities in terms of transmission rate, required throughput, packet loss, etc. Because of the multi-hop transmission characteristic of this prioritized heterogeneous traffic, incidence of congestion is extremely common and unless handled effectively, it may thwart the appliance objectives. To address this challenge, in this work we propose a Prioritized Oriented Congestion Control Protocol (PCCP) which performs hop-by-hop rate adjustment controlling the congestion and ensures efficient rate for the prioritized diverse traffic. This protocol conjointly might be applied for healthcare infrastructure. We exploit cross layer approach to perform the congestion control. Our protocol uses intra-queue priorities along with weighted fair queuing for ensuring feasible transmission rates & throughput of nodal data. It also guarantees efficient link utilization by using dynamic transmission rate adjustment. In this work we present detailed analysis and simulation results with the description of our protocol to demonstrate its effectiveness in handling