Special Issue "Networked Sensors and Actuators"

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A special issue of Future Internet (ISSN 1999-5903).

Deadline for manuscript submissions: closed (31 March 2010)

Special Issue Editors

Guest Editor
Dr. Raul Marin (Website)

University Jaume I of Castellon (Spain), Department of Engineering and Computer Sciences, 12006 Castellon, Spain
Interests: networked sensors and actuators; remote control of devices using internet, internet protocols; e-education contribution
Guest Editor
Dr. Jose M. Claver (Website)

Departament d'Informàtica, Universitat de València, Avd. Vicente Andrés Estellés, s/n 46100 Burjassot, Valencia, Spain
Fax: +34 96 354 47 68
Interests: high speed networks; QoS; internet protocols; networked sensors and actuators; embedded systems and reconfigurable computing

Published Papers (3 papers)

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Research

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Open AccessArticle Node Coloring and Color Conflict Detection in Wireless Sensor Networks
Future Internet 2010, 2(4), 469-504; doi:10.3390/fi2040469
Received: 20 September 2010 / Revised: 1 October 2010 / Accepted: 8 October 2010 / Published: 13 October 2010
Cited by 3 | PDF Full-text (1063 KB) | HTML Full-text | XML Full-text
Abstract
In wireless sensor networks, energy efficiency is mainly achieved by making nodes sleep. In this paper, we present the combination of SERENA, a new node activity scheduling algorithm based on node coloring, with TDMA/CA, a collision avoidance MAC protocol. We show that [...] Read more.
In wireless sensor networks, energy efficiency is mainly achieved by making nodes sleep. In this paper, we present the combination of SERENA, a new node activity scheduling algorithm based on node coloring, with TDMA/CA, a collision avoidance MAC protocol. We show that the  combination of these two protocols enables substantial bandwidth and energy benefits for both general and data gathering applications. As a first contribution, we prove that the three-hop node coloring problem is NP-complete. As a second contribution, the overhead induced by SERENA during network coloring is reduced, making possible the use of these protocols even in dense networks with limited bandwidth. The third contribution of this paper is to show that applying any slot assignment algorithmwith spatial reuse based on node neighborhood without taking into account link quality can lead to poor performances because of collisions. The use of good quality links will prevent this phenomenon. The fourth contribution consists of optimizing end-to-end delays for data gathering applications, by means of cross-layering with the application. However, color conflicts resulting from topology changes, mobility and late node arrivals can give rise to collisions. As a fifth contribution, we show how the MAC layer can detect color conflicts, and cope with them at the cost of a slightly reduced throughput. Then, we discuss the tradeoffbetween requesting SERENA to solve the color conflicts and dealing with them at the MAC layer, our third contribution. The combination of SERENA and TDMA/CA is evaluated through simulations on realistic topologies. Full article
(This article belongs to the Special Issue Networked Sensors and Actuators)
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Open AccessArticle Energy Efficient Routing and Node Activity Scheduling in the OCARI Wireless Sensor Network
Future Internet 2010, 2(3), 308-340; doi:10.3390/fi2030308
Received: 22 July 2010 / Accepted: 11 August 2010 / Published: 17 August 2010
Cited by 3 | PDF Full-text (965 KB) | HTML Full-text | XML Full-text
Abstract
Sensor nodes are characterized by a small size, a low cost, an advanced communication technology, but also a limited amount of energy. Energy efficient strategies are required in such networks to maximize network lifetime. In this paper, we focus on a solution integrating energy efficient [...] Read more.
Sensor nodes are characterized by a small size, a low cost, an advanced communication technology, but also a limited amount of energy. Energy efficient strategies are required in such networks to maximize network lifetime. In this paper, we focus on a solution integrating energy efficient routing and node activity scheduling. The energy efficient routing we propose, called EOLSR, selects the route and minimizes the energy consumed by an end-to-end transmission, while avoiding nodes with low residual energy. Simulation results show that EOLSR outperforms the solution selecting the route of minimum energy as well as the solution based on node residual energy. Cross-layering allows EOLSR to use information from the application layer or the MAC layer to reduce its overhead and increase network lifetime. Node activity scheduling is based on the following observation: the sleep state is the least power consuming state. So, to schedule node active and sleeping periods, we propose SERENA that colors all network nodes using a small number of colors, such that two nodes with the same color can transmit without interfering. The node color is mapped into a time slot during which the node can transmit. Consequently, each node is awake during its slot and the slots of its one-hop neighbors, and sleeps in the remaining time. We evaluate SERENA benefits obtained in terms of bandwidth, delay and energy. We also show how cross-layering with the application layer can improve the end-to-end delays for data gathering applications. Full article
(This article belongs to the Special Issue Networked Sensors and Actuators)
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Review

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Open AccessReview Towards the Robotic “Avatar”: An Extensive Survey of the Cooperation between and within Networked Mobile Sensors
Future Internet 2010, 2(3), 363-387; doi:10.3390/fi2030363
Received: 14 July 2010 / Revised: 20 August 2010 / Accepted: 26 August 2010 / Published: 14 September 2010
Cited by 1 | PDF Full-text (250 KB) | HTML Full-text | XML Full-text
Abstract
Cooperation between networked mobile sensors, wearable and sycophant sensor networks with parasitically sticking agents, and also having human beings involved in the loop is the “Avatarization” within the robotic research community, where all networks are connected and where you can connect/disconnect at [...] Read more.
Cooperation between networked mobile sensors, wearable and sycophant sensor networks with parasitically sticking agents, and also having human beings involved in the loop is the “Avatarization” within the robotic research community, where all networks are connected and where you can connect/disconnect at any time to acquire data from a vast unstructured world. This paper extensively surveys the networked robotic foundations of this robotic biological “Avatar” that awaits us in the future. Cooperation between networked mobile sensors as well as cooperation of nodes within a network are becoming more robust, fault tolerant and enable adaptation of the networks to changing environment conditions. In this paper, we survey and comparatively discuss the current state of networked robotics via their critical application areas and their design characteristics. We conclude by discussing future challenges. Full article
(This article belongs to the Special Issue Networked Sensors and Actuators)

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