Reliability Of Broadcasting Data Dissemination(safety Application)for The Urban Vehicular Ad Hoc Networks

Mobile network topology changes dynamically over time because of the high speed of vehicles.Therefore,the concept of the data dissemination scheme in a VANET environment has become an issue of debate for many research scientists.The main purpose of VANET is to ensure the safety and comfort of the passengers.Safety application and Non-Safety application are two important applications executed in Vehicular Networks.However,in our proposed protocol we take the safety application as our design application goal in data dissemination since it plays a significant role in reducing the number of accidents by giving the driver an early warning accident message that has occurred as the major goal of design VANET.This helps to prevent accidents by giving the drivers extra time to react.However,data dissemination in VANETs can be evaluated depending on existing network infrastructure.During,information dissemination,especially in the dense region,may lead to severe redundancy,the collision of messages as well as network contention this problem called broadcast storm problem.To ensure the reliability of broadcasting in VANETs we present some requirements analysis for design broadcast protocol should meet so as to alleviate the problem mention above.In this study,an effective and efficient adaptive probability data dissemination protocol(EEAPD)is proposed so as to ensure the reliability of broadcasting data dissemination based on safety application for urban VANETs are achieved.EEAPD comprises a delay scheme and probabilistic approach.The redundancy ratio(r)metric is used to explain the correlation between road segments and vehicles' density in rebroadcast probability decisions.The uniqueness of the EEAPD protocol comes from taking into account the number of road segments to decide which nodes are suitable for rebroadcasting the message.From simulation results,EEAPD is shown to achieve its general objective through performing high reliability by achieving better high-packet delivery ratio and low-packet drop ratio without overloading the network resources by providing a better low end-to-end delay.The proposed new protocol is responsive to moderate deployment and adapts to scalable and robustness features since only depend on Vehicle-to-Vehicle(V2V)communication by taking into account a beaconless strategy.The methodology presented in this study has both simulations and theoretical analysis approach.We validated our theoretical analysis by using realistic simulation.The simulations in this study were conducted using NS3 and traffic simulator called “SUMO”.