Editorial Preface From the Desk of Managing Editor…

In the last decade, we have witnessed a big increase in the use of wireless technologies in different type of network, such as ad hoc sensor networks and vehicular ad hoc networks. Ubiquitous access to the information anywhere, anytime, from any device by end-users continue to conduct the need to develop innovative architectures and protocols for ad hoc networks with capabilities that can help achieve this goal. The birth of mobile networks like the VANETs has opened up many research challenges that need to be treating to enable end-to-end communication transparently over a highly heterogeneous network. In particular VANET networks (Vehicular Ad hoc NETworks) are a new form of mobile ad hoc networks used to establish communications between vehicles or with infrastructure located at roadsides. These networks are used to meet the needs of communication applied to transportation networks to improve the driving and road safety for road users. Applications related to road safety is an important part of VANET applications and include the dissemination of messages on the state of traffic, the road conditions, accidents or messages reminding limitations speed and safety distances. Services deployed in VANETs are not limited only to road safety applications but other types of applications that allow the dissemination of practical information by providers of services to drivers of cars like the location of available parking places. The VANETs are characterized by high mobility, related to the speed of the cars, which is important on highways