Roadside Unit Deployment Mechanism Based on Node Popularity

Defense against Sybil attack in the initial deployment stage of vehicular ad hoc network based on roadside unit support

—In this paper, we propose two certificate mechanisms for preventing the Sybil attack in a vehicular ad hoc network (VANET): the timestamp series approach and the temporary certificate approach. We focus on an early-stage VANET when the number of smart vehicles is only a small fraction of the vehicles on the road and the only infrastructure components available are the roadside units (RSUs). Un...

Optimal Roadside Gateway Deployment for VANETs

VANETs allowing the mobile vehicles exchange data with the roadside gateways are being used in various applications such as local electronic advertisement, intelligent transportation system and urban data collection. In this paper, we study the problem of deploying the gateways to provide the desired communication performance while minimizing the deployment cost. The key idea of our solution is...

Improving Roadside Unit Deployment in Vehicular Networks by Exploiting Genetic Algorithms

Vehicular networks make use of the Roadside Units (RSUs) to enhance the communication capabilities of the vehicles in order to forward control messages and/or to provide Internet access to vehicles, drivers and passengers. Unfortunately, within vehicular networks, the wireless signal propagation is mostly affected by buildings and other obstacles (e.g., urban fixtures), in particular when consi...

Node Popularity as a Hypertext Browsing Aid

We have performed a user study where the popularity of each node in a hypertext database was presented with the links leading to that node. Popularity was computed by counting the number of users who had previously visited the node. Our users clearly incorporated popularity information in their decisions; we compare their browsing patterns with a control group for whom the popularity informatio...

Towards connectivity-aware deployment and adjustment for roadside units