Majority of the applications used in defense are voice, video and data oriented and has strict QoS requirements. One of the technologies that enabled this is Asynchronous Transfer Mode (ATM) networking. Traditional ATM networks are wired networks. But Tactical networks are meant to be mobile and this implies the use of radio relays for Vehicle-to-Infrastructure (V2I) and Vehicle-to-Vehicle (V2V...

A facet of the stable set polytope of a graph G can be viewed as a generalization of the notion of an-critical graph. We extend several results from the theory of-critical graphs to facets. The defect of a nontrivial, full-dimensional facet P v2V a(v)x v b of the stable set polytope of a graph G is deened by = P v2V a(v) ?2b. We prove the upper bound a(u) + for the degree of any vertex u in a c...

A vehicular ad hoc network (VANET) is a vehicular-wireless network enabling vehicle-to-vehicle (V2V) communications and vehicle to infrastructure (V2I) communications. VANET has been under the international spotlight because various applications can be developed by leveraging those wireless communications to avoid vehicular collisions or to save energies. Most of VANET applications have been de...

The LiveCity Project effort intends to create a city-based “Living Lab” and associated ecosystem to pilot live interactive high-definition video-tovideo (v2v) on ultrafast wireless and wireline Internet infrastructure for the support of appropriate public service use cases among a number of city user communities initially in four major European cities (Dublin, Athens, Luxembourg (city) and Vall...

Side-sweep accidents are one of the major causes of loss of life and property damage on highways. This type of accident is caused by a driver initiating a lane change while another vehicle is blocking the road in the target lane. In this article, we are trying to quantify the degree to which different implementations of vehicle-to-vehicle (V2V) communication could reduce the occurrence of such ...

In this communication, a low-cost circularly polarized wire antenna exhibiting improved gain performance for Dedicated Short Range Communications (DSRC), vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications is presented. The proposed antenna comprises a Y-shaped quarterwavelength monopole antenna surrounded by two iterations of eight conductive arched walls acting as para...

It is considered that the road condition in the winter is one of the significant issues for the safety driving by tourists or residents. However, there are many difficulties of the V2V networks such as the transmission range of wireless networks and the noises from the automobile’s bodies. Thus, this paper introduces the Adaptive Array Antenna (AAA) controls for the Vehicle-to-Vehicle (V2V) net...

Communication technologies and the management of context aware information are two key researching lines in the intelligent transportation domain. A suited network infrastructure which allows Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communications, on one hand, and the provision of location-based information adapted to the driver, on the other hand, comprise two important co...

We analyze the properties of line of sight (LOS) channels in vehicle-to-vehicle (V2V) communication. We use V2V measurements performed in open space, highway, suburban, and urban environments. By separating LOS from non-LOS data, we show that a two-ray ground reflection path loss model with effective reflection coefficient range fits the LOS channels better than the frequently used free space p...

In this contribution, both numerical and experimental investigations are performed to evaluate the impact of diffuse scattering on the characteristics of vehicular propagation channels in highway environments. The response of a vehicle-tovehicle (V2V) channel can be composed of discrete specular path components and diffuse scattering components. Simulation results in two V2V scenarios with diff...