This paper discusses two new methods for distributing certificate revocation lists (CRL) in a vehicular ad hoc network environment using cooperative methods. The main purpose for using cooperative methods is to attempt to reduce the number of collisions in the dedicated short range communication (DSRC) broadcast environment. The reduced number of collisions will increase the effective throughpu...

We describe three in-field data collection efforts yielding a large database of RSSI values vs. time or distance from vehicles communicating with each other via DSRC. We show several data processing schemes we have devised to develop Vehicle-to-Vehicle (V2V) propagation models from such data. The database is limited in several important ways, not least, the presence of a high noise floor that l...

The use of vehicular networks for collision avoidance increased significantly in the last decade. In particular, governments are employing DSRC-based communication for this purpose. One of the main challenges for DSRC-based vehicular networks is congestion control. Many solutions are proposed in the literature to solve this problem. Recently, EDCA different access categories have been utilized ...

Reliable communications and spatial connection are essential to critical operations of ports. To assure services and security, optimal-degree spider-web networks are prototyped in the dedicated short range communications (DSRC) linked as the surveillance-control network along port’s critical passages to benefit coping with detection-unavailability, radio interference. The radial-ring road confi...

In this paper, an analytic model is proposed for performance evaluation of vehicular safety related services in dedicated short range communications (DSRC) system on highway. The generation and service of safety messages in each vehicle is modeled by an M/G/1 queue. But since vehicles share a medium, the service time distribution of a message needs to take contention and backoff into account. W...

Originally the DSRC applications requires encoding techniques for secure communication which include FM0 and Manchester encoding architecture. On analysis and observing the FM0 and Manchester encoding together in an initial hardware architecture. An effective utilization is more which leads to substantial area consumption. Hence, we adopt SOLS technique which merges architecture together and sy...

the interest of information exchange. The U.S. Government assumes no liability for the contents or use thereof. Transportation Systems, and thus Intelligent Transportation Systems (ITS), are considered one of the most critical infrastructures. For wireless communication ITS use communication links based on Dedicated Short Range Communication (DSRC) in Wireless Access in Vehicular Environments (...

Communications among vehicles is an important field of study for transportation systems. Vehicular Ad Hoc Networks (VANETs) are appropriate networks that can be applied to intelligent transportation systems (Nadeem, 2006). VANET is based on short-range wireless communications among vehicles and is built on-the-fly and do not need any investment, except the wireless network interfaces that will ...

Road transportation injuries, environmental pollution, and wasted energy and time in traffic congestion cause considerable cost to society. Some examples are the $115 billion cost of United States traffic congestion in 2009 and its predicted $23 billion annual cost in Australia by 2020. Intelligent Transportation Systems (ITS) are increasingly being considered to mitigate these impacts. The ben...