IEEE 802.11p/WAVE (Wireless Access for Vehicular Environment) is the emerging standard to enable wireless access in the vehicular environment. Most of the research contributions in this area has focused on safety-related applications, while comfort and information/entertainment applications (such as on board Internet access, point-of-interest notification, e-map download) have been considered only recently. Notwithstanding, the user interest in this kind of applications is expected to become a big market driver in a near future. In this paper, an extension to IEEE 802.11p is proposed that is compliant with the multi-channel operation of the WAVE architecture and targets at the support of non-safety applications, while preserving the delivery of safety services. The proposed W-HCF (WAVE-based Hybrid Coordination Function) protocol leverages controlled access capabilities on top of the basic contention-based access of the IEEE 802.11p; it exploits vehicles’ position information and coordination among WAVE providers in order to improve performances of delay-constrained and loss-sensitive non-safety applications.
"We test 802.11p and 3G network as both could potentially see wider deployment in the future the 802.11p link operates without association, as per WAVE/DSRC specifications. Association can take several seconds, which is consistent with the association time when moving in a vehicle at 40km/h and above . We focus on whether the Wi-Fi interface is able to contribute bandwidth to the connection, and the trade-off between any contribution and the costs of adding/re-moving the Wi-Fi subflow (E.g. "
[Show abstract][Hide abstract] ABSTRACT: Driving means frequently changing location. This, is in turn, means a regular need for information on the current location and specifically for data on the surrounding traffic And there is necessitate of Technique for handling the network connection during the multi-hop data exchange between road side unit and vehicle(V2I) and between vehicles (V2V). Although need for information relate to the close environment of the car is observable, so far no inter vehicle communication systems for data exchange between vehicles and between roadside and number of vehicles has been put into operation. We know driving means continuously change the location so there is need of multi-hop data communication. This study focus on the techniques for multi-hop data (information) exchange on the road between road side unit and vehicle using VANET in a resourceful manner. So here in this paper we study the connectivity aware routing and multipath TCP to improve the file transfer outcomes between road side unit & vehicles. We will also focus on developing implementation of multipath TCP on NS-2. And compare the performance of connectivity aware routing & multipath TCP during the multi-hop data exchange between road side unit and vehicles. When used in mobile scenario MPTCP is found to provide some profit to active 3G connection by detecting and utilization road side Unit.
Computing, Communication & Automation (ICCCA), 2015 International Conference, Noida; 05/2015
"Vehicular ad hoc networks (VANETs) are getting closer and closer to reality in everyday life by providing vehicles and roadside units (RSUs) with communication capabilities . Although initially designed to improve road safety, VANETs can additionally offer commercial, informative, and entertainment services to drivers and passengers , thus also providing revenues to the car manufacturers and service providers. For a deep market penetration of VANETs, efforts are still required to deal with some issues typical of vehicular environments like the fast changing topology, the shortlived intermittent connectivity, the unique set of conceived applications, and the harsh propagation conditions. "
[Show abstract][Hide abstract] ABSTRACT: The peculiarities of the vehicular environment, characterized by dynamic topologies, unreliable broadcast channels, short-lived and intermittent connectivity, call into the question the capabilities of existing IP-based networking solutions to support the wide set of initially conceived and emerging vehicular applications. The research community is currently exploring groundbreaking approaches to transform the Internet. Among them, the Information-Centric Networking (ICN) paradigm appears as a promising solution to tackle the aforementioned challenges. By leveraging innovative concepts, such as named content, name-based routing, and in-network content caching, ICN well suits scenarios in which applications specify what they search for and not where they expect it to be provided and all that is required is a localized communication exchange. In this chapter, solutions are presented that rely on Content-Centric Networking (CCN), the most studied ICN approach for vehicular networks. The potential of ICN as the key enabler of the emerging vehicular cloud computing paradigm is also discussed.
Vehicular ad hoc Networks: Standards, Solutions, and Research, 01/2015: pages 503-524; Springer International Publishing., ISBN: 978-3-319-15497-8
[Show abstract][Hide abstract] ABSTRACT: Vehicular ad hoc networks (VANETs) have been identified as a key technology to enable intelligent transport systems (ITS), which are aimed to radically improve the safety, comfort, and greenness of the vehicles in the road. However, in order to fully exploit VANETs potential, several issues must be addressed. Because of the high dynamic of VANETs and the impairments in the wireless channel, one key issue arising when working with VANETs is the multihop dissemination of broadcast packets for safety and infotainment applications. In this paper a reliable low-overhead multihop broadcast (RLMB) protocol is proposed to address the well-known broadcast storm problem. The proposed RLMB takes advantage of the hello messages exchanged between the vehicles and it processes such information to intelligently select a relay set and reduce the redundant broadcast. Additionally, to reduce the hello messages rate dependency, RLMB uses a point-to-zone link evaluation approach. RLMB performance is compared with one of the leading multihop broadcast protocols existing to date. Performance metrics show that our RLMB solution outperforms the leading protocol in terms of important metrics such as packet dissemination ratio, overhead, and delay.
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