DEEP: Density-Aware Emergency Message Extension Protocol for VANETs

Abstract

Abstract-With the rapid developments in vehicular communication technology, academics and industry researchers are paying increasing attention to vehicular ad hoc networks (VANETs). In VANETs, dissemination delay and reliability are important criteria for many applications, especially for emergency messages. Existing approaches have difficulty satisfying both requirements simultaneously because they conflict with one another. In this paper, we propose a novel mechanism, called the Density-aware Emergency message Extension Protocol (DEEP) to disseminate emergency messages in VANETs. DEEP resolves the broadcast storm problem, achieves low dissemination delay, and provides high reliability over a realistic multi-lane freeway scenario. The mechanism delivers emergency messages to a specific area (e.g., the area before the exit) in a timely manner and guarantees that all relevant vehicles in that area will receive the messages. Drivers can then change their routes and avoid getting caught in a traffic jam. Performance evaluations via NS-2 simulations demonstrate that DEEP achieves both lower dissemination delay and higher reliability than existing approaches.

Secure Certificateless Authentication and Road Message Dissemination Protocol in VANETs

“…Similarly, a cooperative message authentication scheme [18] is developed to alleviate the verification overload in the RSU side, where the legitimate vehicles are responsible for message verification in the vicinity. Thereafter, in order to achieve high reliability and low dissemination delay at the same time, density-aware emergency message extension protocol (DEEP) [22] is constructed. As illustrated, emergency warning messages can be timely delivered to all the vehicles within the operating range, which could drastically improve driving safety.…”

“…Meanwhile, normal channel is the more ordinary way, where the road information is gathered from normal vehicles. In this case, some of the vehicles are assumed to be benign devices which transmit precise messages, while the rest are negative vehicles [22]. Note that the negative vehicles may report trivial or even false information to the VANET system.…”

Modeling and Analysis of Safety Messages Propagation in Platoon‐Based Vehicular Cyber‐Physical Systems

“…From the perspective of routing, an efficient broadcast protocol called Density-aware Emergency message Extension Protocol (DEEP) is proposed in [25]. Different vehicles are given different forwarding priorities by segmenting roads into multiple blocks according to vehicle density.…”

Position Based Density Conscious Routing Protocol in Vehicular Ad Hoc Networks

“…However, the drawback is the overuse of the bandwidth for any communication i.e., misuse of the bandwidth due to redundant copies of the same packet available over the network. Density Aware Emergency Message Extension Protocol DEEP [3] focuses on delay and reliability of emergency messages while achieving a trade-off between the two conflicting parameters. The protocol guarantees the delivery of emergency information in timely manner .While the Greedy Bundle Relaying Scheme with Bulk Bundle Release (GBRS-BBR) [10] allows source to greedily release a bulk of bundles to every arriving vehicle irrespective of its arrival time and speed, which are predicted to contribute the most minimization of overall bundle delivery delay.…”