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About

About

Bruno F. Marques was born in 1971. He received a BsC de- gree in 1994, and a Diploma degree in 1998, all in Electrical Engineering from Polytechnic Institute?s School of Technology of Viseu, Portugal. In 2001 he received an M.S in Electri- cal and Computer Engineering from University of Porto, Portugal. He is presently studying for a Ph.D degree. He is an assistant professor at School of Technology and Management of Viseu, where he gives courses in industrial and computer networks, and embedded systems.

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Publications

2017

Synchronization of application-driven WSN

Authors
Marques, B; Ricardo, M;

Publication
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING

Abstract
The growth of wireless sensor networks (WSN) has resulted in part from requirements for connecting sensors and advances in radio technologies. WSN nodes may be required to save energy and therefore wake up and sleep in a synchronized way. In this paper, we propose an application-driven WSN node synchronization mechanism which, by making use of cross-layer information such as application ID and duty cycle, and by using the exponentially weighted moving average (EWMA) technique, enables nodes to wake up and sleep without losing synchronization. The results obtained confirm that this mechanism maintains the nodes in a mesh network synchronized according to the applications they run, while maintaining a high packet reception ratio.

2017

Energy-efficient node selection in application-driven WSN

Authors
Marques, B; Ricardo, M;

Publication
WIRELESS NETWORKS

Abstract
The growth of wireless networks has resulted in part from requirements for connecting people and advances in radio technologies. Wireless sensor networks are an example of these networks in which a large number of tiny devices interacting with their environments may be internet-worked together and accessible through the Internet. As these devices may be scattered in an unplanned way, a routing protocol is needed. The RPL protocol is the IETF proposed standard protocol for IPv6-based multi-hop WSN. RPL requires that communication paths go through a central router which may provide suboptimal paths, not considering the characteristics of the applications the nodes run. In this paper is proposed an Application-Driven extension to RPL which enables to increase the WSN lifetime by limiting the routing and forwarding functions of the network mainly to nodes running the same application. As nodes may join a network at a non predictable time, they must be synchronized with respect to their application duty cycles. Therefore, nodes have to wake up and sleep in a synchronized way. In this paper it is also proposed such synchronization mechanism. The results confirm that the proposed solutions provide lower energy consumption and lower number of packets exchanged than the conventional RPL solution, while maintaining fairness and the packet reception ratio high.

2014

Improving the Energy Efficiency of WSN by Using Application-Layer Topologies to Constrain RPL-defined Routing Trees

Authors
Marques, BF; Ricardo, MP;

Publication
2014 13TH ANNUAL MEDITERRANEAN AD HOC NETWORKING WORKSHOP (MED-HOC-NET)

Abstract
The deployment of thousands of tiny devices inter-networked together and accessible through the Internet is the result of the increasing trend towards enabling the concepts of Internet-of-Things. As these devices may be scattered in a unplanned way, a routing protocol is needed. The RPL protocol is the IETF proposed standard protocol for IPv6-based multi-hop Wireless Sensor Networks (WSN). RPL requires that communication paths go through a central router which may provide suboptimal paths, making no distinction of the applications the nodes run. To address these issues, an Application-Driven extension to RPL is proposed which enables the increase of the WSN lifetime by limiting the routing and forwarding functions of the network mainly to nodes running the same application. This paper evaluates the proposed solution coded in ContikiOS by means of Cooja simulations, and compares it against regular RPL. Simulation results confirm that the proposed solution provides lower energy consumption, lower end-to-end delays, and lower total number of packets transmitted and received.

2011

Application-Driven design to extend WSN lifetime

Authors
Bruno Filipe Marques; Manuel Ricardo

Publication
CNRS 2011 - The 1st Portuguese Conference on Wireless Sensor Networks, Coimbra, Portugal

Abstract