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The current dependency of Artificial Intelligence (AI) systems on Cloud computing implies higher transmission latency and bandwidth consumption. Moreover, it challenges the real-time monitoring of physical objects, e.g., the Internet of Things (IoT). Edge systems bring computing closer to end devices and support time-sensitive applications. However, Edge systems struggle with state-of-the-art Deep Neural Networks (DNN) due to computational resource limitations. This paper proposes a technology framework that combines the Edge-Cloud architecture concept with BranchyNet advantages to support fault-tolerant and low-latency AI predictions. The implementation and evaluation of this framework allow assessing the benefits of running Distributed DNN (DDNN) in the Cloud-to-Things continuum. Compared to a Cloud-only deployment, the results obtained show an improvement of 45.34% in the response time. Furthermore, this proposal presents an extension for Kafka-ML that reduces rigidness over the Cloud-to-Things continuum managing and deploying DDNN.
Daniel R. Torres; Cristian Martín; Bartolomé Rubio; Manuel Díaz. An open source framework based on Kafka-ML for Distributed DNN inference over the Cloud-to-Things continuum. Journal of Systems Architecture 2021, 118, 102214 .
AMA StyleDaniel R. Torres, Cristian Martín, Bartolomé Rubio, Manuel Díaz. An open source framework based on Kafka-ML for Distributed DNN inference over the Cloud-to-Things continuum. Journal of Systems Architecture. 2021; 118 ():102214.
Chicago/Turabian StyleDaniel R. Torres; Cristian Martín; Bartolomé Rubio; Manuel Díaz. 2021. "An open source framework based on Kafka-ML for Distributed DNN inference over the Cloud-to-Things continuum." Journal of Systems Architecture 118, no. : 102214.
This paper presents a data-centric middleware responsible for real-time communication and data storage in smart grids. The middleware offers a high level programming model that provides ways of storing/getting information from/to the grid and encrypts messages thus providing a secure message exchange. The design has taken into account the heterogeneity of devices, software platforms and stakeholders involved in this kind of Cyber-physical System (CPS). A modular vision is followed in such a way that middleware components can be easily adapted to different platforms and a simple data interface is provided by using REST (Representational State Transfer) web services and a high level asynchronous API. The middleware has been used in the context of a European project (e-balance) where soft real-time requirements, security and low capacity devices were some of the requirements. The demonstration scenarios are detailed in this paper together with the validation tests that show that the use of this programming abstraction is feasible.
Jaime Chen; Eduardo Cañete; Daniel Garrido; Manuel Díaz; Krzysztof Piotrowski. PICO: A platform independent communications middleware for heterogeneous devices in smart grids. Computer Standards & Interfaces 2019, 65, 1 -14.
AMA StyleJaime Chen, Eduardo Cañete, Daniel Garrido, Manuel Díaz, Krzysztof Piotrowski. PICO: A platform independent communications middleware for heterogeneous devices in smart grids. Computer Standards & Interfaces. 2019; 65 ():1-14.
Chicago/Turabian StyleJaime Chen; Eduardo Cañete; Daniel Garrido; Manuel Díaz; Krzysztof Piotrowski. 2019. "PICO: A platform independent communications middleware for heterogeneous devices in smart grids." Computer Standards & Interfaces 65, no. : 1-14.
Currently, applications in the Internet of Things (IoT) are tightly coupled to the underlying physical devices. As a consequence, upon adding a device, device replacement or user’s relocation to a different physical space, application developers have to re-perform installation and configuration processes to reconfigure applications, which bears costs in time and knowledge of low-level details. In the emerging IoT field, this issue is even more challenging due to its current unpredictable growth in term of applications and connected devices. In addition, IoT applications can be personalised to each end user and can be present in different environments. As a result, IoT scenarios are very changeable, presenting a challenge for IoT applications. In this paper we present Appdaptivity, a system that enables the development of portable device-decoupled applications that can be adapted to changing contexts. Through Appdaptivity, application developers can intuitively create portable and personalised applications, disengaging from the underlying physical infrastructure. Results confirms a good scalability of the system in terms of connected users and components involved.
Cristian Martín; Jeroen Hoebeke; Jen Rossey; Manuel Diaz; Bartolomé Rubio; Floris Van Den Abeele. Appdaptivity: An Internet of Things Device-Decoupled System for Portable Applications in Changing Contexts. Sensors 2018, 18, 1345 .
AMA StyleCristian Martín, Jeroen Hoebeke, Jen Rossey, Manuel Diaz, Bartolomé Rubio, Floris Van Den Abeele. Appdaptivity: An Internet of Things Device-Decoupled System for Portable Applications in Changing Contexts. Sensors. 2018; 18 (5):1345.
Chicago/Turabian StyleCristian Martín; Jeroen Hoebeke; Jen Rossey; Manuel Diaz; Bartolomé Rubio; Floris Van Den Abeele. 2018. "Appdaptivity: An Internet of Things Device-Decoupled System for Portable Applications in Changing Contexts." Sensors 18, no. 5: 1345.
Luis Alonso; Javier Barbarán; Jaime Chen; Manuel Díaz; Luis Llopis; Bartolomé Rubio. Middleware and communication technologies for structural health monitoring of critical infrastructures: A survey. Computer Standards & Interfaces 2018, 56, 83 -100.
AMA StyleLuis Alonso, Javier Barbarán, Jaime Chen, Manuel Díaz, Luis Llopis, Bartolomé Rubio. Middleware and communication technologies for structural health monitoring of critical infrastructures: A survey. Computer Standards & Interfaces. 2018; 56 ():83-100.
Chicago/Turabian StyleLuis Alonso; Javier Barbarán; Jaime Chen; Manuel Díaz; Luis Llopis; Bartolomé Rubio. 2018. "Middleware and communication technologies for structural health monitoring of critical infrastructures: A survey." Computer Standards & Interfaces 56, no. : 83-100.
In the Internet of Things (IoT) a worldwide network of sensors and actuators transmit data and actuate over the Internet. Nevertheless, the deployment of sensors and actuators usually requires tools to program and configure them before they can work, and not everyone has such access. Current smartphones are provided with a large set of sensors and actuators that can be incorporated in the IoT. With the aim of achieving seamless integration, this paper presents SocICoAP, a system that enables the sharing of sensors and actuators present in smartphones and installing custom ones at run-time in microcontrollers. In this way smartphones are integrated into the IoT, not only a sensor providing data from its built-in sensors but also as a gateway for nearby deployed sensors. Furthermore, the sensor data can also be globally shared and analysed through a cloud computing integration.
Cristian Martin; Jaime Chen; Manuel Díaz; Ana Reyna; Bartolome Rubio. SocICoAP: Social Interaction with Supplementary Sensors and Actuators through CoAP in Smartphones. 2017 IEEE 41st Annual Computer Software and Applications Conference (COMPSAC) 2017, 2, 672 -677.
AMA StyleCristian Martin, Jaime Chen, Manuel Díaz, Ana Reyna, Bartolome Rubio. SocICoAP: Social Interaction with Supplementary Sensors and Actuators through CoAP in Smartphones. 2017 IEEE 41st Annual Computer Software and Applications Conference (COMPSAC). 2017; 2 ():672-677.
Chicago/Turabian StyleCristian Martin; Jaime Chen; Manuel Díaz; Ana Reyna; Bartolome Rubio. 2017. "SocICoAP: Social Interaction with Supplementary Sensors and Actuators through CoAP in Smartphones." 2017 IEEE 41st Annual Computer Software and Applications Conference (COMPSAC) 2, no. : 672-677.
Marisol García-Valls; Daniel Garrido; Manuel Díaz. Impact of Middleware Design on the Communication Performance. Transactions on Petri Nets and Other Models of Concurrency XV 2017, 505 -519.
AMA StyleMarisol García-Valls, Daniel Garrido, Manuel Díaz. Impact of Middleware Design on the Communication Performance. Transactions on Petri Nets and Other Models of Concurrency XV. 2017; ():505-519.
Chicago/Turabian StyleMarisol García-Valls; Daniel Garrido; Manuel Díaz. 2017. "Impact of Middleware Design on the Communication Performance." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 505-519.
The continuous growth of the Internet of Things in recent years has meant it is increasingly more present, as Internet of Things scenarios such as smart homes and smart cities become part of our everyday lives. The Internet of Things devices involved can be divided into two categories in most Internet of Things scenarios. The devices can constitute a black box with specific sensors which complicates their configuration, for example, wearable products. Other Internet of Things devices can be composed through configurable microcontrollers, enabling customizable environments to be designed. However, the necessary tools and knowledge for programming and configuring microcontrollers are not accessible to everyone. This article proposes a run-time deployment and management system through the Constrained Application Protocol that bridges the gap between end users and customizable environments. With our system, end users can incorporate new sensors or actuators in their installed microcontroller without having to access and program the microcontroller board. Rather, they can manage the resources of the Constrained Application Protocol servers through an accessible and transparent Web user interface.
Cristian Martín; Manuel Díaz; Bartolomé Rubio. Run-time deployment and management of CoAP resources for the Internet of Things. International Journal of Distributed Sensor Networks 2017, 13, 1 .
AMA StyleCristian Martín, Manuel Díaz, Bartolomé Rubio. Run-time deployment and management of CoAP resources for the Internet of Things. International Journal of Distributed Sensor Networks. 2017; 13 (3):1.
Chicago/Turabian StyleCristian Martín; Manuel Díaz; Bartolomé Rubio. 2017. "Run-time deployment and management of CoAP resources for the Internet of Things." International Journal of Distributed Sensor Networks 13, no. 3: 1.
The Internet of Things (IoT) is a paradigm based on the Internet that comprises many interconnected technologies like RFID (Radio Frequency IDentification) and WSAN (Wireless Sensor and Actor Networks) in order to exchange information. The current needs for better control, monitoring and management in many areas, and the ongoing research in this field, have originated the appearance and creation of multiple systems like smart-home, smart-city and smart-grid. However, the limitations of associated devices in the IoT in terms of storage, network and computing, and the requirements of complex analysis, scalability, and data access, require a technology like Cloud Computing to supplement this field. Moreover, the IoT can generate large amounts of varied data and quickly when there are millions of things feeding data to Cloud Computing. The latter is a clear example of Big Data, that Cloud Computing needs to take into account. This paper presents a survey of integration components: Cloud platforms, Cloud infrastructures and IoT Middleware. In addition, some integration proposals and data analytics techniques are surveyed as well as different challenges and open research issues are pointed out.
Manuel Díaz; Cristian Martín; Bartolome Rubio. State-of-the-art, challenges, and open issues in the integration of Internet of things and cloud computing. Journal of Network and Computer Applications 2016, 67, 99 -117.
AMA StyleManuel Díaz, Cristian Martín, Bartolome Rubio. State-of-the-art, challenges, and open issues in the integration of Internet of things and cloud computing. Journal of Network and Computer Applications. 2016; 67 ():99-117.
Chicago/Turabian StyleManuel Díaz; Cristian Martín; Bartolome Rubio. 2016. "State-of-the-art, challenges, and open issues in the integration of Internet of things and cloud computing." Journal of Network and Computer Applications 67, no. : 99-117.
The Internet of Things (IoT) is an emerging technology that is growing continuously thanks to the number of devices deployed and data generated. Nevertheless, an upper layer to abstract the limitations of storing, processing, battery and networking is becoming a mandatory need in this field. Cloud Computing is an especially suitable technology that can supplement this field in the limitations mentioned. However, the current platforms are not prepared for querying large amounts of data with arbitrary functions in real-time, which are necessary requirements for real-time systems. This paper presents \(\lambda \)-CoAP architecture, a novel paradigm not introduced yet to the best of our knowledge, which proposes an integration of Cloud Computing and Internet of Things through the Lambda Architecture (LA) and a Constrained Application Protocol (CoAP) middleware. The \(\lambda \)-CoAP architecture has the purpose to query, process and analyze large amounts of IoT data with arbitrary functions in real-time. On the other hand, the CoAP middleware is a lightweight middleware that can be deployed in resource constrained devices and allows the way of the IoT towards the Web of Things. Moreover, the \(\lambda \)-CoAP also contains a set of components with well defined interfaces for querying, managing, and actuating over the system.
Manuel Díaz; Cristian Martín; Bartolomé Rubio. $$\lambda $$ -CoAP: An Internet of Things and Cloud Computing Integration Based on the Lambda Architecture and CoAP. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016, 195 -206.
AMA StyleManuel Díaz, Cristian Martín, Bartolomé Rubio. $$\lambda $$ -CoAP: An Internet of Things and Cloud Computing Integration Based on the Lambda Architecture and CoAP. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2016; ():195-206.
Chicago/Turabian StyleManuel Díaz; Cristian Martín; Bartolomé Rubio. 2016. "$$\lambda $$ -CoAP: An Internet of Things and Cloud Computing Integration Based on the Lambda Architecture and CoAP." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 195-206.
Recently, slab track systems have arisen as a safer and more sustainable option for high speed railway infrastructures, compared to traditional ballasted tracks. Integrating Wireless Sensor Networks within these infrastructures can provide structural health related data that can be used to evaluate their degradation and to not only detect failures but also to predict them. The design of such systems has to deal with a scenario of large areas with inaccessible zones, where neither Internet coverage nor electricity supply is guaranteed. In this paper we propose a monitoring system for slab track systems that measures vibrations and displacements in the track. Collected data is transmitted to passing trains, which are used as data mules to upload the information to a remote control center. On arrival at the station, the data is stored in a database, which is queried by an application in order to detect and predict failures. In this paper, different communication architectures are designed and tested to select the most suitable system meeting such requirements as efficiency, low cost and data accuracy. In addition, to ensure communication between the sensing devices and the train, the communication system must take into account parameters such as train speed, antenna coverage, band and frequency.
Eduardo Cañete; Jaime Chen; Manuel Díaz; Luis Llopis; Ana Reyna; Bartolome Rubio. Using Wireless Sensor Networks and Trains as Data Mules to Monitor Slab Track Infrastructures. Sensors 2015, 15, 15101 -15126.
AMA StyleEduardo Cañete, Jaime Chen, Manuel Díaz, Luis Llopis, Ana Reyna, Bartolome Rubio. Using Wireless Sensor Networks and Trains as Data Mules to Monitor Slab Track Infrastructures. Sensors. 2015; 15 (7):15101-15126.
Chicago/Turabian StyleEduardo Cañete; Jaime Chen; Manuel Díaz; Luis Llopis; Ana Reyna; Bartolome Rubio. 2015. "Using Wireless Sensor Networks and Trains as Data Mules to Monitor Slab Track Infrastructures." Sensors 15, no. 7: 15101-15126.
Open-source middleware started to be used several years ago for the development of complex applications. When these applications were developed, no real data were available about how maintenance activities could be affected over time. This is especially important for critical applications expected to be maintained over several years. This paper presents maintenance experiences with applications using open-source middleware (TAO and JacORB). These applications are developed using a component model for real-time applications implemented on top of the middleware. Improvements for software reliability have been detected during this time. We present them and how they can be applied to applications using TAO.
Manuel Díaz; Daniel Garrido. Maintenance of Reliable Distributed Applications with Open-Source Middleware: Fifteen Years Later. Transactions on Petri Nets and Other Models of Concurrency XV 2015, 116 -128.
AMA StyleManuel Díaz, Daniel Garrido. Maintenance of Reliable Distributed Applications with Open-Source Middleware: Fifteen Years Later. Transactions on Petri Nets and Other Models of Concurrency XV. 2015; ():116-128.
Chicago/Turabian StyleManuel Díaz; Daniel Garrido. 2015. "Maintenance of Reliable Distributed Applications with Open-Source Middleware: Fifteen Years Later." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 116-128.
Wireless Sensor Networks constitute pervasive and distributed computing systems and are potentially one of the most important technologies of this century. They have been specifically identified as a good candidate to become an integral part of the protection of critical infrastructures. In this paper we focus on railway infrastructure protection and we present the details of a sensor platform designed to be integrated into a slab track system in order to carry out both installation and maintenance monitoring activities. In the installation phase, the platform helps operators to install the slab tracks in the right position. In the maintenance phase, the platform collects information about the structural health and behavior of the infrastructure when a train travels along it and relays the readings to a base station. The base station uses trains as data mules to upload the information to the internet. The use of a train as a data mule is especially suitable for collecting information from remote or inaccessible places which do not have a direct connection to the internet and require less network infrastructure. The overall aim of the system is to deploy a permanent economically viable monitoring system to improve the safety of railway infrastructures.
Eduardo Cañete; Jaime Chen; Manuel Diaz; Luis Llopis; Bartolomé Rubio. Sensor4PRI: A Sensor Platform for the Protection of Railway Infrastructures. Sensors 2015, 15, 4996 -5019.
AMA StyleEduardo Cañete, Jaime Chen, Manuel Diaz, Luis Llopis, Bartolomé Rubio. Sensor4PRI: A Sensor Platform for the Protection of Railway Infrastructures. Sensors. 2015; 15 (3):4996-5019.
Chicago/Turabian StyleEduardo Cañete; Jaime Chen; Manuel Diaz; Luis Llopis; Bartolomé Rubio. 2015. "Sensor4PRI: A Sensor Platform for the Protection of Railway Infrastructures." Sensors 15, no. 3: 4996-5019.
Currently, Cloud Computing is a cutting edge technology as it is changing how people produce, consume and share information. Nevertheless, a bigger evolution of the Cloud is yet to come by means of new applications and improvements but also with the combination of other arising technologies, resulting in a huge advance as part of the Future Internet. The next step of the Future Internet in the next few years is to get every single device connected at any-time and in any-place with any other device. Moreover, Wireless Sensor Networks offer a technology for monitoring and networking that is low power and low cost which is the basic layer in a world of things interconnected. The combination of Wireless Sensor Networks and Cloud Computing will enable unprecedented opportunities in the Future Internet that will include physical devices. This paper presents a new framework that simplifies the integration of Wireless Sensor Networks in the Cloud. The approach is highly reconfigurable, self-managed and takes into account real-time requirements. The basic idea of the framework is the concept of Virtual Channels, which exchange messages between every single device and the Cloud. The framework then publishes a "virtual sensor" service representing one or more physical sensors.
Javier Barbaran; Manuel Díaz; Bartolome Rubio. A Virtual Channel-Based Framework for the Integration of Wireless Sensor Networks in the Cloud. 2014 International Conference on Future Internet of Things and Cloud 2014, 334 -339.
AMA StyleJavier Barbaran, Manuel Díaz, Bartolome Rubio. A Virtual Channel-Based Framework for the Integration of Wireless Sensor Networks in the Cloud. 2014 International Conference on Future Internet of Things and Cloud. 2014; ():334-339.
Chicago/Turabian StyleJavier Barbaran; Manuel Díaz; Bartolome Rubio. 2014. "A Virtual Channel-Based Framework for the Integration of Wireless Sensor Networks in the Cloud." 2014 International Conference on Future Internet of Things and Cloud , no. : 334-339.
Wireless sensor and actuator networks (WSAN) constitute an emerging technology with multiple applications in many different fields. Due to the features of WSAN (dynamism, redundancy, fault tolerance, and self-organization), this technology can be used as a supporting technology for the monitoring of critical infrastructures (CIs). For decades, the monitoring of CIs has centered on supervisory control and data acquisition (SCADA) systems, where operators can monitor and control the behavior of the system. The reach of the SCADA system has been hampered by the lack of deployment flexibility of the sensors that feed it with monitoring data. The integration of a multihop WSAN with SCADA for CI monitoring constitutes a novel approach to extend the SCADA reach in a cost-effective way, eliminating this handicap. However, the integration of WSAN and SCADA presents some challenges which have to be addressed in order to comprehensively take advantage of the WSAN features. This paper presents a solution for this joint integration. The solution uses a gateway and a Web services approach together with a Web-based SCADA, which provides an integrated platform accessible from the Internet. A real scenario where this solution has been successfully applied to monitor an electrical power grid is presented.
Antonio M. Grilo; Jaime Chen; Manuel Díaz; Daniel Garrido; Augusto Casaca. An Integrated WSAN and SCADA System for Monitoring a Critical Infrastructure. IEEE Transactions on Industrial Informatics 2014, 10, 1755 -1764.
AMA StyleAntonio M. Grilo, Jaime Chen, Manuel Díaz, Daniel Garrido, Augusto Casaca. An Integrated WSAN and SCADA System for Monitoring a Critical Infrastructure. IEEE Transactions on Industrial Informatics. 2014; 10 (3):1755-1764.
Chicago/Turabian StyleAntonio M. Grilo; Jaime Chen; Manuel Díaz; Daniel Garrido; Augusto Casaca. 2014. "An Integrated WSAN and SCADA System for Monitoring a Critical Infrastructure." IEEE Transactions on Industrial Informatics 10, no. 3: 1755-1764.
Jaime Chen; Manuel Díaz; Bartolome Rubio; José M. Troya. PS-QUASAR: A publish/subscribe QoS aware middleware for Wireless Sensor and Actor Networks. Journal of Systems and Software 2013, 86, 1650 -1662.
AMA StyleJaime Chen, Manuel Díaz, Bartolome Rubio, José M. Troya. PS-QUASAR: A publish/subscribe QoS aware middleware for Wireless Sensor and Actor Networks. Journal of Systems and Software. 2013; 86 (6):1650-1662.
Chicago/Turabian StyleJaime Chen; Manuel Díaz; Bartolome Rubio; José M. Troya. 2013. "PS-QUASAR: A publish/subscribe QoS aware middleware for Wireless Sensor and Actor Networks." Journal of Systems and Software 86, no. 6: 1650-1662.
Although the proportion of Peer-to-Peer (P2P) traffic has declined in recent years in favor of video streaming and one-click hosting, P2P traffic is predicted to increase in the years to come. Moreover, P2P principles can be applied to improve both, video streaming and one-click hosting, so, P2P is going to continue to be an active research area. This paper presents COINS, a new coalition-formation and incentive mechanism based on game theory. This mechanism encourages cooperative behavior, since contributing peers receive in return a better quality of service, whilst preventing the free-riding problem. To achieve this, we define a “Responsiveness bonus” that reflects the overall contribution of the peer to the system, and we use the game theory utility concept to calculate it. Empirical results, obtained through simulations, show the ability of the coalitions to effectively stop free-riding and promote contribution, increasing the performance of the P2P network and obtaining an improvement in download time. In addition, we prove that users that pursue self-interested strategies, and that contribute, benefit the system.
Maria-Victoria Belmonte; Manuel Díaz; Jose-Luis Perez-De-La-Cruz; Ana Reyna. COINS: COalitions and INcentiveS for effective Peer-to-Peer downloads. Journal of Network and Computer Applications 2013, 36, 484 -497.
AMA StyleMaria-Victoria Belmonte, Manuel Díaz, Jose-Luis Perez-De-La-Cruz, Ana Reyna. COINS: COalitions and INcentiveS for effective Peer-to-Peer downloads. Journal of Network and Computer Applications. 2013; 36 (1):484-497.
Chicago/Turabian StyleMaria-Victoria Belmonte; Manuel Díaz; Jose-Luis Perez-De-La-Cruz; Ana Reyna. 2013. "COINS: COalitions and INcentiveS for effective Peer-to-Peer downloads." Journal of Network and Computer Applications 36, no. 1: 484-497.
Jaime Chen; Manuel Díaz; Bartolome Rubio; José M. Troya. RAISE: RAIlway Infrastructure Health Monitoring Using Wireless SEnsor Networks. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2013, 143 -157.
AMA StyleJaime Chen, Manuel Díaz, Bartolome Rubio, José M. Troya. RAISE: RAIlway Infrastructure Health Monitoring Using Wireless SEnsor Networks. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. 2013; ():143-157.
Chicago/Turabian StyleJaime Chen; Manuel Díaz; Bartolome Rubio; José M. Troya. 2013. "RAISE: RAIlway Infrastructure Health Monitoring Using Wireless SEnsor Networks." Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering , no. : 143-157.
The natural selfish behavior of P2P system users, has given rise to the appearance of freeriding. These users download but don’t contribute to the system, leading to a degradation of the system, and the user experiences. It becomes mandatory to find proper mechanisms to incentive cooperation among users in these systems. In this paper we provide an incentive based coalitions to improve the system welfare and users experiences. A peer that participates in a coalition lends “bandwidth” to other peers of the coalition, in exchange for utility and consequently a far better experience. Taking concepts from game theory we provide a solid ground upon which we build our mechanism . Simulated experiments support the approach, showing how encouraging participation stops freeriding and therefore improve the system performance and the user experience.
M. V. Belmonte; M. Díaz; A. Reyna. Improving File Sharing Experience with Incentive Based Coalitions. Communications in Computer and Information Science 2013, 287 -301.
AMA StyleM. V. Belmonte, M. Díaz, A. Reyna. Improving File Sharing Experience with Incentive Based Coalitions. Communications in Computer and Information Science. 2013; ():287-301.
Chicago/Turabian StyleM. V. Belmonte; M. Díaz; A. Reyna. 2013. "Improving File Sharing Experience with Incentive Based Coalitions." Communications in Computer and Information Science , no. : 287-301.
It is well known that the use of clusters makes wireless sensor and actor networks more scalable, and it also reduces energy consumption and improves their performance. Most hierarchical routing and clustering protocols are designed to be efficient when the data is sent from the sensor nodes to their cluster-head but not when it is sent the opposite way. In this paper, a simple mechanism to form clusters in an efficient way by using meta-data is proposed. And, furthermore, a novelty multi-hop and fault-tolerance routing protocol able to transport data from sensor nodes to their cluster-head and vice versa in an energy-efficient way is also presented. Moreover, this approach allows developers to establish the desired reliability level (in a quantitative way) between two nodes which are N hops far away from each other. The performance and the energy consumption of our approach is studied by means of a set of experiments which have been carried out by using the COOJA simulator.
Eduardo Cañete; Manuel Díaz; Luis Llopis; Bartolomé Rubio. HERO: A hierarchical, efficient and reliable routing protocol for wireless sensor and actor networks. Computer Communications 2012, 35, 1392 -1409.
AMA StyleEduardo Cañete, Manuel Díaz, Luis Llopis, Bartolomé Rubio. HERO: A hierarchical, efficient and reliable routing protocol for wireless sensor and actor networks. Computer Communications. 2012; 35 (11):1392-1409.
Chicago/Turabian StyleEduardo Cañete; Manuel Díaz; Luis Llopis; Bartolomé Rubio. 2012. "HERO: A hierarchical, efficient and reliable routing protocol for wireless sensor and actor networks." Computer Communications 35, no. 11: 1392-1409.
In this paper we discuss the idea of combining wireless sensor networks and cloud computing starting with a state of the art analysis of existing approaches in this field. As result of the analysis we propose to reflect a real wireless sensor network by virtual sensors in the cloud. The main idea is to replicate data stored on the real sensor nodes also in the virtual sensors, without explicit triggering such updates from the application. We provide a short overview of the resulting architecture before explaining mechanisms to realize it. The means to ensure a certain level of consistency between the real WSN and the virtual sensors in the cloud is distributed shared memory. In order to realize DSM in WSNs we have developed a middleware named tinyDSM which is shortly introduced here and which provides means for replicating sensor data and ensuring the consistency of the replicates. Even though tinyDSM is a pretty good vehicle to realize our idea there are some open issues that need to be addressed when realizing such an architecture. We discuss these challenges in an abstract way to ensure clear separation between the idea and its specific realization.
Peter Langendoerfer; Krzysztof Piotrowski; Manuel Díaz; Bartolome Rubio. Distributed Shared Memory as an Approach for Integrating WSNs and Cloud Computing. 2012 5th International Conference on New Technologies, Mobility and Security (NTMS) 2012, 1 -6.
AMA StylePeter Langendoerfer, Krzysztof Piotrowski, Manuel Díaz, Bartolome Rubio. Distributed Shared Memory as an Approach for Integrating WSNs and Cloud Computing. 2012 5th International Conference on New Technologies, Mobility and Security (NTMS). 2012; ():1-6.
Chicago/Turabian StylePeter Langendoerfer; Krzysztof Piotrowski; Manuel Díaz; Bartolome Rubio. 2012. "Distributed Shared Memory as an Approach for Integrating WSNs and Cloud Computing." 2012 5th International Conference on New Technologies, Mobility and Security (NTMS) , no. : 1-6.