Miguel Elias M. Campista

Learn More
WMNs are low-cost access networks built on cooperative routing over a backbone composed of stationary wireless routers. WMNs must deal with the highly unstable wireless medium. Therefore, the design of algorithms that consider link quality to choose the best routes are enabling routing metrics and protocols to evolve. In this work, we analyze the state of(More)
A particular class of vehicular networks is the one that includes off-the-shelf end-user equipments (e.g., laptops and PDAs) running from the interior of vehicles, namely in-car nodes. They are subject to limited communication conditions when compared with nodes specifically designed to this context. Existing works either consider antennas installed on top(More)
This paper presents the design of a plug-in for the Optimized Link State Routing (OLSR) protocol with the Expected Transmission Time (ETT) metric and experiments in an indoor testbed. The ETT metric is implemented as a plug-in, keeping portability and facilitating its deployment on operational networks. Our design identifies important implementation issues.(More)
Managing computer networks is challenging because of the numerous monitoring variables and the difficulty to autonomously configure network parameters. This paper presents the OpenFlow MaNagement Infrastructure (OMNI), which helps the administrator to control and manage OpenFlow networks by providing remote management based on a web interface. OMNI provides(More)
Current proposals of automated traffic monitoring systems for highways require high investment in terms of installation and maintenance, especially because these systems rely on a central element which is responsible for inferring and disseminating the traffic conditions. This paper presents DTraMS (Decentralized Traffic Monitoring System), a system that(More)
A wireless ad hoc network is a collection of wireless nodes that can dynamically self-organize into an arbitrary and temporary topology to form a network without necessarily using any pre-existing infrastructure. These characteristics make ad hoc networks well suited for military activities, emergency operations, and disaster recoveries. Nevertheless, as(More)
The network infrastructure plays an important role for datacenter applications. Therefore, datacenter network architectures are designed with three main goals: bandwidth, latency and reliability. This work focuses on the last goal and provides a comparative analysis of the topologies of prevalent datacenter architectures. Those architectures use a network(More)
Powerline communications (PLC) are receiving special attention since they use an already available and ubiquitous infrastructure. The main standard for PLC home networks is HomePlug. This work improves the throughput of HomePlug by modifying the medium access control sub-layer. The key idea is to define a fast collision avoidance mechanism where every(More)
This work proposes the Wireless-mesh-network Proactive Routing (WPR) protocol for wireless mesh networks. Unlike current routing protocols, such as the Optimized LinkState Routing (OLSR), WPR uses a controlled-flooding algorithm tailored to the typical wireless-mesh-network traffic matrix, which concentrates traffic on links close to the gateway. The goal(More)
Wireless mesh networks (WMNs) are emerging as a promising solution for ubiquitous Internet access with mobility support. In such networks, user mobility may lead to Internet gateway changes and, consequently, impact the performance of continuous media applications. In this article, we investigate the impact of user mobility on the performance of(More)