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Routing remains one of the key challenges in vehicular networks due to their special properties such as the high mobility and the intermittent connectivity. Almost all the efficient routing solutions proposed for VANETs are based on geographic information provided by the navigation systems widely deployed in the new generation of vehicles. Typically, in these position-based protocols, a source node...
Because of shortage of raw materials, the energy-saving issues become popular in Vehicular Ad-hoc Networks (VANETs). A VANET is formed by traveling vehicles with communicating capability and thus it brings various applications. Navigation system is one of important applications in VANETs. The traditional navigation system usually plans a shortest path for users according to geographic maps but the...
Most of routing protocols in VANETs are position-based due to their well scalability. The forwarding decisions of such protocols are simply based on the location information of forwarders' neighborhood and the destination node. Due to high mobility of vehicles, location-service protocols are required to provide the destination location. Location services protocols can be categorized as flooding-based...
Traffic Information System(s) (TIS) has drawn a lot research attention in recent few years. Existing TIS proposals can be classified into two categories: infrastructure-less and infrastructure-based. Currently proposed infrastructure-less TIS cover only local scope; although the second type is likely to cover city-wide areas, it relies on expensive infrastructure-support. The design of an infrastructure-less...
There are two main types of applications for vehicular ad-hoc networks (VANET): safety applications and user applications (such as entertainment and mobile commerce). For user applications, Internet connectivity is a necessity. However, it is challenging to provide fast handoff for vehicles in a VANET due to the rapid movement of vehicles. Previous studies have showed that the time required by the...
The location service is an important component of position-based routing protocols, used for VANETs. A hierarchical structured location service called map based location service (MBLS) is proposed in this paper. The MBLS exploits navigation system by using geographical data file (GDF) from the digital-map database to recruit location servers and to send location updates. Simulation results show that...
Rapid advancement in wireless communication has made it possible to develop vehicular ad hoc networks, in which a vehicle can communicate with other vehicles via a wireless, multi-hop fashion. A variety of appealing real-world applications can be enabled by VANETs, such as driving safety and urban monitoring. Many location based routing algorithms have been proposed for data delivery in VANETs. Most...
Internet-based vehicular ad hoc network (IVANET) is an emerging technique that combines a wired Internet and a vehicular ad hoc network (VANET) for providing universal information and service accessibility. A key design optimization technique in IVANETs is to cache the frequently accessed data items in a local storage of vehicles. Since vehicles are not critically limited by the storage/memory space...
Ubiquitous Internet connectivity is very important in present environment. A lot of research has been done to extend Internet connectivity to vehicular ad hoc networks (VANETs). The biggest challenge to achieve this goal is the requirement of pervasive fully networked roadside infrastructure. This requirement is difficult to achieve especially during the initial deployment phase of vehicular networks...
Efficient location management is one of the major challenges in vehicular ad hoc networks (VANETs). Due to the high mobility of vehicles and the increase in their number, the location information updating and querying messages will consume the limited bandwidth of VANETs. This involves the development of a scalable and locality-aware location service management protocol. In this paper, we propose...
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