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Displaying 1-32 out of 32 total
Scheduling Nodes in Wireless Sensor Networks: A Voronoi Approach
Found in: Local Computer Networks, Annual IEEE Conference on
By Marcos Augusto M. Vieira, Luiz Filipe M. Vieira, Linnyer B. Ruiz, Antonio A. F. Loureiro, Antonio O. Fernandes, José Marcos S. Nogueira
Issue Date:October 2003
pp. 423
A wireless sensor network is a special kind of ad-hoc network with distributed sensing and processing capability that can be used in a wide range of applications, such as environmental monitoring, industrial applications and precision agriculture. Despite ...
 
A small world model to improve synchronization algorithms for wireless sensor networks
Found in: Computers and Communications, IEEE Symposium on
By Daniel L. Guidoni, Azzedine Boukerche, Horacio A. B. F. Oliveira, Raquel A. F. Mini, Antonio A. F. Loureiro
Issue Date:June 2010
pp. 229-234
In wireless sensor networks, there are some network functions and applications that need to know the local time of a node in order to timestamp a sensed data. In general, it may be unfeasible to have a synchronization hardware in each sensor. In this work,...
 
How to conciliate conflicting users' interests for different collective, ubiquitous and context-aware applications?
Found in: Local Computer Networks, Annual IEEE Conference on
By Thais, R. M. Braga Silva Thais, Linnyer, B. Ruiz Linnyer, Antonio, A. F. Loureiro Antonio
Issue Date:October 2010
pp. 288-291
Ubiquitous systems are generally embedded into the environment and provide their services all the time and everywhere. In order to increase transparency and personalization, ubiquitous applications are normally context-aware, i.e., they use information abo...
 
A framework for cognitive radio wireless sensor networks
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Luiz H. A. Correia,Erasmo E. Oliveira,Daniel F. Macedo,Pedro M. Moura,Antonio A. F. Loureiro,Jorge Sa Silva
Issue Date:July 2012
pp. 000611-000616
The growth of mobile computing has increased the demand for wireless communication, causing a higher demand for the wireless medium as well as spectrum pollution. Smart radios, also called cognitive radios, monitor the network to identify the best availabl...
   
Evaluation of Peer-to-Peer Network Content Discovery Techniques over Mobile Ad Hoc Networks
Found in: A World of Wireless, Mobile and Multimedia Networks, International Symposium on
By Leonardo B. Oliveira, Isabela G. Siqueira, Daniel F. Macedo, Antonio A. F. Loureiro, Hao Chi Wong, José M. Nogueira
Issue Date:June 2005
pp. 51-56
Both Mobile Ad Hoc Networks (MANETs) and Peer-to-Peer (P2P) Networks are decentralized and self-organizing networks with dynamic topology and responsible for routing queries in a distributed environment. Because MANETs are composed of resource-constrained ...
 
Simulating Large Wireless Sensor Networks Using Cellular Automata
Found in: Simulation Symposium, Annual
By Renan O. Cunha, Aloizio P. Silva, Antônio A. F. Loureiro, Linnyer B. Ruiz
Issue Date:April 2005
pp. 323-330
A wireless sensor network is a special kind of ad hoc network where the nodes can sense, actuate, compute and communicate with each other using point-to-point multi-hop communication. Sensor networks can be used in a wide range of applications, such as env...
 
VCARP: Vehicular Ad-hoc Networks context-aware routing protocol
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Rodrigo B. Soares,Eduardo F. Nakamura,Carlos M. S. Figueiredo,Antonio A. F. Loureiro
Issue Date:July 2012
pp. 000442-000447
Vehicular Networks routing protocols must deal with several issues such as high mobility, high speed and, consequently, high disconnection rate among the network nodes. In this paper, we propose VCARP, a geocast routing protocol for Vehicular Networks that...
   
A tree-based approach to design Heterogeneous Sensor Networks based on small world concepts
Found in: Local Computer Networks, Annual IEEE Conference on
By Daniel L. Guidoni,Azzedine Boukerche,Leandro A. Villas,Raquel A. F. Mini,Antonio A. F. Loureiro
Issue Date:October 2011
pp. 666-672
A typical Wireless Sensor Network (WSN) assumes a homogeneous set of nodes in terms of capabilities. However, this kind of network suffer from poor fundamental limits of latency during the data communication. Another model of WSN assumes a heterogeneous se...
 
WISENEP: A Network Processor for Wireless Sensor Networks
Found in: Computers and Communications, IEEE Symposium on
By Andre Mota, Leonardo B. Oliveira, Felipe F. Rocha, Ramon Riserio, Antonio A. F. Loureiro, Claudionor J.N. Coelho Jr., Hao Chi Wong, Eduardo Nakamura
Issue Date:June 2006
pp. 8-14
Wireless sensor networks are ad hoc networks comprised mainly of small sensor nodes with limited resources and one or more base stations, which are much more powerful laptopclass nodes that connect the sensor nodes to the rest of the world. The advent of t...
 
LIAITHON: A location-aware multipath video streaming scheme for urban vehicular networks
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Renfei Wang,Cristiano Rezende,Heitor S. Ramos,Richard W. Pazzi,Azzedine Boukerche,Antonio A. F. Loureiro
Issue Date:July 2012
pp. 000436-000441
Transmitting video content over Vehicular Ad Hoc Networks (VANETs) faces a great number of challenges caused by strict QoS (Quality of Service) requirements and highly dynamic network topology. In order to tackle these challenges, multipath forwarding sche...
   
Event detection framework for wireless sensor networks considering data anomaly
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Leticia Decker de Sousa,Alejandro C. Frery,Eduardo F. Nakamura,Antonio A. F. Loureiro
Issue Date:July 2012
pp. 000500-000507
Event detection is a topic widely discussed in the wireless sensor network (WSN) community. The goal of this process is to identify when the collected data represents an event occurrence. The lack of uniformity when approaching this problem, such as the mo...
   
Data Dissemination Using the Energy Map
Found in: Wireless on Demand Network Systems and Service, International Conference on
By Max do V. Machado, Olga Goussevskaia, Raquel A. F. Mini, Cristiano G. Rezende, Antonio A. F. Loureiro, Geraldo R. Mateus, José Marcos Nogueira
Issue Date:January 2005
pp. 139-148
One of the most important resources in wireless sensor networks is energy, since, in general, batteries cannot be recharged. The information about the amount of energy available at each part of the network is called the energy map and can be explored by ro...
 
A framework based on small world features to design HSNs topologies with QoS
Found in: 2012 IEEE Symposium on Computers and Communications (ISCC)
By Daniel L. Guidoni,Azzedine Boukerche,Leandro A. Villas,Fernanda S. H. Souza,Raquel A. F. Mini,Antonio A. F. Loureiro
Issue Date:July 2012
pp. 000732-000737
In this work we propose a framework based on the small world features to design Heterogeneous Sensor Network (HSN) topologies with QoS. The framework creates three different topologies and each topology has its goals related to the latency and energy consu...
   
Dynamic Power Management in Wireless Sensor Networks: An Application-Driven Approach
Found in: Wireless on Demand Network Systems and Service, International Conference on
By Rodrigo M. Passos, Claudionor J. N. Coelho Jr., Antonio A. F. Loureiro, Raquel A. F. Mini
Issue Date:January 2005
pp. 109-118
Energy is a limited resource in wireless sensor networks. In fact, the reduction of power consumption is crucial to increase the lifetime of low power sensor networks. Several approaches on dynamic power management have contributed to reduce the power cons...
 
Comparative Analysis of Power Consumption in the Implementation of Arithmetic Algorithms
Found in: IEEE TrustCom/IEEE ICESS/FCST, International Joint Conference of
By Alexandre Wagner C. Faria,Leandro P. de Aguiar,Daniel D. Lara,Antonio A. F. Loureiro
Issue Date:November 2011
pp. 1247-1254
Historically, energy management in computer science has been predominantly treated as an activity of hardware optimization. A great deal of the effort in this area is concentrated on component activation, deactivation, and resource scheduling in order to p...
 
Highly Dynamic Routing Protocol for data aggregation in sensor networks
Found in: Computers and Communications, IEEE Symposium on
By Leandro Villas, Azzedine Boukerche, Regina Borges de Araujo, Antonio A. F. Loureiro
Issue Date:June 2010
pp. 496-502
In wireless sensor networks, data aggregation is critical to network lifetime. It implies that data will be aggregated while flowing from multiple sources to a specific node named sink. The construction of routing trees aware of the data aggregation has a ...
 
Conflict Resolution in Collective Ubiquitous Context-Aware Applications
Found in: Sistemas Colaborativos, Simpósio Brasilerio de
By Thais R. M. Braga Silva, Linnyer B. Ruiz, Antonio A. F. Loureiro
Issue Date:October 2009
pp. 123-134
The context-aware computing is a research field that defines systems capable of adapting their behavior according to any relevant information about entities of interest. The ubiquitous computing is closely related to the use of contexts, since it aims to p...
 
A conflict resolution methodology for collective ubiquitous context-aware applications
Found in: International Conference on Computer Supported Cooperative Work in Design
By Thais R. M. Braga Silva, Antonio A. F. Loureiro
Issue Date:April 2009
pp. 426-431
The context-aware computing is a research field that defines systems capable of adapting their behavior according to any relevant information about entities (e.g.,people, places and objects) of interest. The ubiquitous computing is closely related to the u...
 
Malicious Node Detection in Wireless Sensor Networks
Found in: Parallel and Distributed Processing Symposium, International
By Waldir Ribeiro Pires Júnior, Thiago H. de Paula Figueiredo, Hao Chi Wong, Antonio A. F. Loureiro
Issue Date:April 2004
pp. 24b
This work provides a solution to identify malicious nodes in wireless sensor networks through detection of malicious message transmissions in a network. A message transmission is considered suspicious if its signal strength is incompatible with its origina...
 
How effective is to look at a vehicular network under a social perception?
Found in: 2013 IEEE 9th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
By Felipe D. Cunha,Aline Carneiro Vianna,Raquel A. F. Mini,Antonio A. F Loureiro
Issue Date:October 2013
pp. 154-159
Vehicular Mobility is strongly influenced by the speed limits and direction of the public roads. At the same time, the driver's behavior produces great influences in vehicular mobility. People tend to go to the same places, at the same day period, through ...
   
DCR: Depth-Controlled Routing protocol for underwater sensor networks
Found in: 2013 IEEE Symposium on Computers and Communications (ISCC)
By Rodolfo W. L. Coutinho,Luiz F. M. Vieira,Antonio A. F. Loureiro
Issue Date:July 2013
pp. 000453-000458
Underwater sensor networks have recently been proposed as a way to observe and explore the lakes, rives, seas, and oceans. However, due to characteristics of the acoustic medium, efficient protocols for delivering data must exist. In this work, we propose ...
   
Challenges and opportunities on the large scale study of city dynamics using participatory sensing
Found in: 2013 IEEE Symposium on Computers and Communications (ISCC)
By Thiago H. Silva,Pedro O. S. Vaz de Melo,Jussara M. Almeida,Antonio A. F. Loureiro
Issue Date:July 2013
pp. 000528-000534
Cities are not identical and evolve over time, and sensing in large scale can be used to capture these differences. Research in Wireless Sensor Networks has provided several tools, techniques and algorithms to solve the problem of sensing in restricted sce...
   
Data dissemination in urban Vehicular Ad hoc Networks with diverse traffic conditions
Found in: 2013 IEEE Symposium on Computers and Communications (ISCC)
By Guilherme Maia,Leandro A. Villas,Azzedine Boukerche,Aline C. Viana,Andre L. L. Aquino,Antonio A. F. Loureiro
Issue Date:July 2013
pp. 000459-000464
Envisioned applications for VANETs will rely extensively on the exchange of broadcast messages to deliver data to vehicles located in a region of interest. Many data dissemination protocols have been proposed in the literature to suppress this need. Surpri...
   
ID-MAC: An identity-based MAC protocol for Wireless Sensor Networks
Found in: 2013 IEEE Symposium on Computers and Communications (ISCC)
By Felipe D. Cunha,Italo Cunha, Hao Chi Wong,Antonio A. F. Loureiro,Leonardo B. Oliveira
Issue Date:July 2013
pp. 000975-000981
Wireless Sensor Networks (WSNs) are comprised mainly of resource-constrained sensor nodes that can be used to monitor areas of interest. In sensor networks, replacement of node batteries is usually infeasible and power consumption must be minimal to increa...
   
Forecasting in the NBA and other team sports: Network effects in action
Found in: ACM Transactions on Knowledge Discovery from Data (TKDD)
By Antonio A. F. Loureiro, Christos Faloutsos, Pedro O. S. Vaz de Melo, Virgilio A. F. Almeida
Issue Date:October 2012
pp. 1-27
The multi-million sports-betting market is based on the fact that the task of predicting the outcome of a sports event is very hard. Even with the aid of an uncountable number of descriptive statistics and background information, only a few can correctly g...
     
Information fusion in wireless sensor networks
Found in: Proceedings of the 2008 ACM SIGMOD international conference on Management of data (SIGMOD '08)
By Antonio A. F. Loureiro, Eduardo F. Nakamura
Issue Date:June 2008
pp. 13-14
Wireless sensor networks (WSNs) are commonly treated as a distributed database system that is accessed by means of a query language. However, the computation of such queries are usually performed by information fusion techniques. Information fusion has bee...
     
Information fusion for wireless sensor networks: Methods, models, and classifications
Found in: ACM Computing Surveys (CSUR)
By Alejandro C. Frery, Antonio A. F. Loureiro, Eduardo F. Nakamura
Issue Date:September 2007
pp. 9-es
Wireless sensor networks produce a large amount of data that needs to be processed, delivered, and assessed according to the application objectives. The way these data are manipulated by the sensor nodes is a fundamental issue. Information fusion arises as...
     
Energy map construction for wireless sensor network under a finite energy budget
Found in: Proceedings of the 7th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems (MSWiM '04)
By Antonio A. F. Loureiro, Badri Nath, Raquel A. F. Mini
Issue Date:October 2004
pp. 165-169
A fundamental issue in the design of a wireless sensor network is to devise mechanisms to make efficient use of its energy, and thus, extend its lifetime. Due to the importance of energy conservation, it is highly desirable to define the amount of energy e...
     
Energy efficient GPS sensing with cloud offloading
Found in: Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems (SenSys '12)
By Antonio A. F. Loureiro, Bodhi Priyantha, Heitor S. Ramos, Jie Liu, Qiang Wang, Ted Hart
Issue Date:November 2012
pp. 85-98
Location is a fundamental service for mobile computing. Typical GPS receivers, although widely available, consume too much energy to be useful for many applications. Observing that in many sensing scenarios, the location information can be post-processed w...
     
A flexible architecture for mobile collaboration services
Found in: Proceedings of the ACM/IFIP/USENIX international middleware conference companion on Middleware '08 Companion (Companion '08)
By Antonio A. F. Loureiro, Daniel Schuster, Iris Braun, Jordan Janeiro, Markus Endler, Thomas Springer
Issue Date:December 2008
pp. 31-36
While a multitude of collaborative applications are available in mobile environments, most of them are built from scratch or use proprietary libraries. In this paper we present a conceptual architecture and a set of reusable services for mobile collaborati...
     
Gossiping using the energy map in wireless sensor networks
Found in: Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems (MSWiM '07)
By Antonio A. F. Loureiro
Issue Date:October 2007
pp. 368-372
A gossip protocol randomly decides the set of nodes that will forward a packet it received. Gossiping was proposed to be used in dynamic topology networks such as Wireless Sensor Networks (WSNs). This work proposes Gossiping using the Energy Map (GEM), a n...
     
A novel lightweight algorithm for time-space localization in wireless sensor networks
Found in: Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems (MSWiM '07)
By Antonio A. F. Loureiro
Issue Date:October 2007
pp. 336-343
Localization in time and space can be defined as the problem of solving both synchronization and positioning problems at the same time. This is a key problem for wireless sensor networks that need to determine timing and location information of detected ph...
     
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