Browsing Electronic & Electrical Eng (Scholarly Publications) by Author "DA SILVA, LUIZ"
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Adaptation in a Channel Access Game with Private Monitoring
DA SILVA, LUIZ (2013)Under the opportunistic spectrum access paradigm, the shared pool of spectrum bands that the multiple autonomous cognitive radios (CRs) need to compete for is not necessarily homogeneous. The non-homogeneity in channels ... -
Adaptation of Reputation Management Systems to Dynamic Network Conditions in Ad Hoc Networks
DA SILVA, LUIZ (2010)Reputation management systems have been proposed as a cooperation enforcement solution in ad hoc networks. Typically, the functions of reputation management (evaluation, detection, and reaction) are carried out homogeneously ... -
An Analysis of Competition among Autonomous Devices in Multichannel Cognitive Radio Networks
DA SILVA, LUIZ (2012)We investigate an autonomous opportunistic spec- trum access (OSA) strategy for a multichannel cognitive radio (CR) network, where two or more autonomous CRs sense the channels sequentially in some sensing order to find ... -
Carrier Aggregation as a Repeated Game: Learning Algorithms for Efficient Convergence to a Nash Equilibrium
DA SILVA, LUIZ; MACALUSO, IRENE (2013)Carrier aggregation is a key feature of next generation wireless networks to deliver high-bandwidth links. This paper studies carrier aggregation for au- tonomous networks operating in shared spectrum. In our model, ... -
Channel Assignment Based on Routing Decisions (CARD): Traffic-Dependent Topology Control for Multi-Channel Networks
DA SILVA, LUIZ (2009-06)Dynamic spectrum access (DSA) holds the promise for more efficient utilization of the spectrum, while requiring greater cooperation between PHY, MAC, and NET layers to allocate resources and dynamically react to changing ... -
Cognitive radio and networking research at Virginia Tech
DA SILVA, LUIZ (IEEE, 2009)More than a dozen Wireless @ Virginia Tech faculty are working to address the broad research agenda of cognitive radio and cognitive networks. Our core research team spans the protocol stack from radio and reconfigura ... -
A Comparison of Channel Assignment Techniques with Power Control in Ad Hoc Networks
DA SILVA, LUIZ (2009)Multi-channel operation in an ad hoc network can improve robustness and reliability by ef?ciently managing interference and reducing contention. In this paper, we model four dynamic channel assignment techniques under the ... -
Complexity of Spectrum Activity and Benefits of Learning for Dynamic Channel Selection
DA SILVA, LUIZ; MACALUSO, IRENE (2013)We explore the question of when learning improves the performance of opportunistic dynamic channel selection by characterizing the primary user (PU) activity using the concept of Lempel-Ziv complexity. We evaluate the ... -
Deployment of UAV-mounted Access Points According to Spatial User Locations in Two-tier Cellular Networks
DA SILVA, LUIZ; KIBILDA, JACEK (2016) -
Dynamic spectrum access in LTE-advanced networks
DA SILVA, LUIZ (2014)As early as 2014, mobile network operators? spectral capacity will be overwhelmed by the demand brought on by new devices and applications. To augment capacity and meet this demand, operators may choose to deploy a Dynamic ... -
Dynamic Spectrum Scheduling for Carrier Aggregation: A Game Theoretic Approach
DA SILVA, LUIZ; DI FRANCESCO, PAOLO (2013)In this paper, we investigate the performance of the dynamic allocation of resources between separate cellular networks. We propose a Dynamic Internetworking Carrier Aggregation (DI-CA) framework which involves every ... -
The effect of the spectrum opportunities diversity on opportunistic access
DA SILVA, LUIZ; AHMADI, HAMED; MACALUSO, IRENE (IEEE, 2013)To improve their ability to find spectrum oppor- tunities, intelligent secondary radios (SR) can learn from their past observations and predict possible spectrum opportunities. However, because of the diverse behavior ... -
Efficient Coverage through Inter-operator Infrastructure Sharing in Mobile Networks
DA SILVA, LUIZ; KIBILDA, JACEK (2013) -
Evaluation of Dynamic Channel and Power Assignment for Cognitive Networks
DA SILVA, LUIZ (2011)In this paper, we develop a unifying optimization formulation to describe the Dynamic Channel and Power Assignment (DCPA) problem and an evaluation method for comparing DCPA algorithms. DCPA refers to the allocation of ... -
Experiences from the Iris Testbed in Dynamic Spectrum Access and Cognitive Radio Experimentation
DA SILVA, LUIZ; DOYLE, LINDA; SUTTON, PAUL; NOLAN, KEITH; LOTZE, JORG (2010)The focus of this paper is an experimentation platform known as Iris that has a runtime reconfigurable software radio at its core. We have employed this platform to enable a wide variety of tests and experimentation in the ... -
Fairness and Efficiency Tradeoffs for User Cooperation in Distributed Wireless Networks
DA SILVA, LUIZ (2013)We propose a general framework to analyze incentives for user cooperation, and characterize the tradeoff between fairness and efficiency for cooperative networks. More specifically, we define the incentive region as a ... -
Incentives for Infrastructure Deployment by Over-the-Top Service Providers in a Mobile Network: A Cooperative Game Theory Model
DA SILVA, LUIZ; KIBILDA, JACEK (2016) -
Infrastructure and Spectrum Sharing Trade-offs in Mobile Networks
DA SILVA, LUIZ; KIBILDA, JACEK (2015) -
Learning and Reasoning in Cognitive Radio Networks
DA SILVA, LUIZ; MACALUSO, IRENE (2013)Cognitive radio networks challenge the traditional wireless networking paradigm by introducing concepts firmly stemmed into the Artificial Intelligence (AI) field, i.e., learning and reasoning. This fosters optimal resource ... -
Learning Nash Equilibria in Distributed Channel Selection for Frequency-Agile Radios
DA SILVA, LUIZ; DOYLE, LINDA; MACALUSO, IRENE (2012)Wireless communication networks are evolving towards self- configuring, autonomous and distributed multiagent systems in which nodes are deployed randomly and have to adapt to the en- vironment in which they operate. A ...