The publish / subscribe scheme is an efficient paradigm for communication widely used in wired networks. However the use of this paradigm in the context of mobile networks such as VANETs is still an open research topic. In particular, the communication needs of mobile nodes often depend on the node state, location and/or surroundings. Consequently, extensions to the P/S paradigm have been propo...

Vehicular ad hoc networks (VANETs) are the specific class of Mobile ad hoc networks (MANETs).In a VANET, vehicles will rely on the integrity of received data for deciding when to present alerts to drivers. In this paper, we investigate the authentication issues with privacy preservation and non-repudiation in VANETs. We propose a novel framework with preservationand repudiation (ACPN) for VANET...

Vehicular Ad-hoc Network systems (VANETs) are a dynamic wireless network where the nodes move randomly without any infrastructure. VANETs are an open transmission and communication media without any security mechanism. So, there are a lot of malicious nodes attacks on VANETs. Blackhole attack is one of the security threats in which the traffic isn’t transmitted to the destination node but will ...

Vehicular adhoc networks (VANETs) are the important subset of mobile ad-hoc network (MANET) application which uses set of smart vehicles on road in the form of mobile nodes. The VANET provides the benefits of road safety and travellers comfort while protecting driver’s privacy from different types of attacks perpetrated by adversaries. In the forthcoming, it is usual that have vehicles which gr...

The Networks of vehicles moving on the road are considered as Vehicular Ad Hoc Networks (VANETs). The relative speed of the vehicles may be up to 300 km/hr and the number of nodes is very high. In Vehicular Ad Hoc Networks (VANETs) the nodes movement is bounded to road topology. In VANET the link breakage can be avoided with the help of the mobility pattern knowledge for neighbor nodes. In this...

Vehicular ad-hoc networks (VANETs) offer a large number of new potential applications. One of the envisioned applications is of course Internet access, which can be provided with the help of some roadside basestations. Many of the applications benefit from multi-hop relaying of information, thus requiring a routing protocol. Characteristics unique to VANETs (such as high mobility and the need f...

Local vehicle density estimation is increasingly becoming an essential factor of many vehicular ad-hoc network applications such as congestion control and traffic state estimation. This estimation is used to get an approximate number of neighbors within the transmission range since beacons do not give accurate accuracy about neighborhood. These is due to the special characteristics of VANETs su...

Vehicular Adhoc Networks (VANETs) are subpart of Mobile Adhoc Network. VANETs are self-organized wireless networks, which are infrastructure less. Due to the high mobility of VANETs and increase the speed of vehicles, the connectivity between vehicles become poor which result in an increase the dropped packets overhead of LSGO routing protocol. LSGO routing protocol is a combination of link sta...

Vehicular Ad hoc Network (VANET) is one type of Mobile Ad hoc Network (MANET). In VANETs, vehicles are connecting to computer networks. VANETs have dynamic nodes in the form of moving vehicles and static nodes in the form of Road Side Units (RSU). Movements of vehicles are limited to road layouts and fast compared to other ad hoc networks. Hence, frequent disconnections are happening in the com...

Vehicular Ad hoc Networks (VANETs) has a large research potential due to the requirement of real-time traffic information and its various applications. QoS requirements are important for VANET applications to ensure safety and provide emergency services. Due to the highly dynamic environment the connectivity between vehicles degrades leading to a highly unstable network. Existing algorithms doe...