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Intelligent Transportation Systems (ITSs) have attracted much attention recently. One of the most important services for ITSs is to provide real-time traffic information service. To reduce the deployment cost and achieve high service availability, decentralized approaches such as vehicular ad hoc network (VANET)-based or infrastructure-based peer-to-peer (P2P) traffic information systems were proposed...
In this paper, we investigate the effects of routing loop, sinkhole, and wormhole attacks on the position-based routing (PBR) in vehicular ad hoc networks (VANETs). We also introduce a new attack termed wormhole-aided sybil attack on PBR. Our study shows that the wormhole-aided sybil attack has the worst impact on the packet delivery in PBR. To ensure the reliability of PBR in VANETs, we propose a...
In this paper, we propose a new intersection-based geographical routing protocol, called delay tolerant routing protocol (DTRP) that adapts to the changes in the local topology within city environments. DTRP is based on an effective selection of road intersections through which a packet must pass to reach the gateway to the Internet. The selection, in such delay tolerant VANETs, is made in a way that...
In vehicular ad hoc networks (VANETs), delivering messages to a specific location is difficult due to the high mobility of vehicles. In this paper, we propose a method for efficient message delivery in VANETs utilizing the route information in car navigation systems. In the proposed method, each car periodically exchanges the information on its current position and scheduled route in the car navigation...
Routing of data packets in vehicular ad hoc networks (VANETs) is challenging due to dynamic changes in the network topologies. As nodes in VANETs can obtain accurate position information from onboard Global Positioning System receivers, position-based routing is considered to be a very promising routing strategy for VANETs. This paper presents a novel position-based directional vehicular routing (PDVR)...
This paper introduces P2P communication across a VANET and seeks to establish under what conditions (mobility, network size, wireless channel) data streaming is feasible. Routing of streamed services over multiple hops and multiple paths may result in significant packet losses, resulting in unacceptable quality of service. This paper examines the impact of differing traffic densities and different...
The effectiveness of Intelligent Transportation Systems (ITS) depends on their ability to collect contextual data from various sources and appropriately generate and transport comprehensible, reliable and timely content to users. In such applications, the exchanged content is structured in space and time. Peer-to-peer(P2P) networks are the natural choice these applications due to their fault-tolerance,...
In this paper, we propose the object pursuing based efficient routing algorithm (OPERA) suitable for vehicular ad hoc networks (VANETs), esp. in sparse situations. The proposed algorithm is applicable for both moving and fixed destinations. It is based on considering static nodes at each intersection. In this algorithm, we optimize the decision making at intersections, with respect to the connectivity...
Structured, spatial-temporal data arises in many applications areas such as transportation, sensor networks or mobile services. Peer to peer networks are the natural choice for the distributed architecture required by these applications. However, a closer analysis of the available distributed hash table (DHT) based approaches shows their inefficiency since the data structure gets lost and the short...
This article presented landmark overlays for urban vehicular routing environments (LOUVRE), a density-based landmark overlay routing protocol for urban vehicular environments. We described the concept and the protocol as well as a novel distributed traffic density estimation scheme. We implemented the protocol in Qualnet and evaluated the feasibility of LOUVRE by comparing it with the benchmarks GPSR...
In this paper, we introduce a routing solution called "landmark overlays for urban vehicular routing environments" (LOUVRE), an approach that efficiently builds a landmark overlay network on top of an urban topology. We define urban junctions as overlay nodes and create an overlay link if and only if the traffic density of the underlying network guarantees the multi-hop vehicular routing...
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