Routing Protocols in Vehicular Ad Hoc Networks

Abstract

Vehicular Ad hoc Network (VANET), a subclass of mobile ad hoc networks (MANETs), is a promising approach for the intelligent transportation system (ITS). The design of routing protocols in VANETs is important and necessary issue for support the smart ITS. The key difference of VANET and MANET is the special mobility pattern and rapidly changeable topology. It is not effectively applied the existing routing protocols of MANETs into VANETs. In this chapter, we mainly survey new routing results in VANET. The authors introduce unicast protocol, multicast protocol, geocast protocol, mobicast protocol, and broadcast protocol. It is observed that carry-and-forward is the new and key consideration for designing all routing protocols in VANETs. With the consideration of multi-hop forwarding and carryand- forward techniques, min-delay and delay-bounded routing protocols for VANETs are discussed in VANETs. Besides, the temporary network fragmentation problem and the broadcast storm problem are further considered for designing routing protocols in VANETs. The temporary network fragmentation problem caused by rapidly changeable topology influence on the performance of data transmissions. The broadcast storm problem seriously affects the successful rate of message delivery in VANETs. The key challenge is to overcome these problems to provide routing protocols with the low communication delay, the low communication overhead, and the low time complexity.

Stochastic modeling and performance analysis in balancing load and traffic for vehicular ad hoc networks: A review

“…An ad hoc network is the interconnection of nodes forming a network that dynamically changes without fixed infrastructure while providing decentralized management 3 . The network of driving vehicles known as VANET is a specific type of Mobile Ad hoc Network (MANET), 4 in which the movement of nodes is faster than MANET. A network such as this allows for infrastructure‐to‐vehicle (IVC) and vehicle‐to‐vehicle (V2V) communication.…”