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Online education is evolving at a fast pace thanks to novel technology-mediated learning environments: Massive Open Online Courses (MOOCs), gamified learning, intelligent tutoring systems, citizen-science communities, informal learning groups are blossoming everywhere as novel opportunities for teachers and learners. However, the educational effectiveness of these solutions has to be proved and technological...
Game theory is often used to find equilibria where no player can unilaterally increase its own payoff by changing its strategy without changing the strategies of other players. In this paper, we propose to use coalition formation to compute the optimized tours of mobile sinks in charge of collecting data from static wireless sensor nodes. Mobile sinks constitute a very attractive solution for wireless...
The deployment of dense networks of Small Cells (SC) is one of the key components of 5G mobile networks and will pose several challenges to the backhaul network. Software-Defined Networking (SDN) is a key technique to cope with the increased management complexity of such heterogeneous deployments, helping in the task of achieving a system-wide network management, which includes the 5G mobile wireless...
The number and capabilities of IoT devices will exponentially grow over the next years. Together with the pervasive diffusion of smart personal mobile devices this opens up unprecedented opportunities for contextualised services provided to mobile users, based on their current interests and behaviours. In addition, most of these services will be content-centric rather than host-centric. Cloud computing...
Wireless Sensor Network formed by huge number sensors, used to detect the physical conditions and environmental conditions. These sensors have very small computing capability and less storage. This limits its use in medical health applications. Additional Storage capacity can be achieved by cloud computing. Cloud computing is one of the innovative paradigm which provides computing resources such as...
This paper introduces and analyzes a novel mobile access coordinated wireless sensor network (MC-WSN) architecture. In conventional sensor networks with mobile access points (SENMA), the mobile access (MA) points traverse the network to collect information directly from individual sensors. While simplifying the routing process, a major limitation with SENMA is that data transmission is limited by...
While mobility is the inherent cause of resource poverty and low connectivity in wireless environment, it also enables the opportunity for surrounding sensing, therefor providing mobilityaugmented cloud service becomes the key challenge for the emerging paradigm of Mobile Cloud Computing (MCC). This article provides an overview of the mechanisms and open issues for mobility-augmented service provisioning...
In this paper, we analyze the throughput of a novel mobile access coordinated wireless sensor network architecture (MC-WSN) under single path and multipath routing. The obtained throughput expressions highlight the trade-off between achieving high throughput performance and improving the network security strength. The results reveal the importance of: (i) minimizing the number of hops in maximizing...
In this paper, we will introduce the relay system based on time division duplexing technology. Especially, we suggest various frame structure to adjust the throughput ratio of downlink and uplink. Finally, we show the test results of relay system we developed.
Augmented reality (AR) is a promising technology for building applications in an Internet of Things (IoT) environment, utilized for visualizing information provided by IoT devices. In this paper, we enable Web-based mobile AR applications with mobile agents in a resource-oriented IoT system architecture. We present an adaptable mobile agent composition that contains the data representation logic and...
In environmental monitoring, such as air quality monitoring, accurate and continuous data collection through a wireless sensor network is of significance. In this paper, we describe a deployed and participatory sensing system which monitors the environmental parameters through deployed sensor nodes or crowd-owned sensors, e.g., smartphones with affordable additional sensors. The noisy sensory information...
In this paper, we propose a novel mobile access coordinated wireless sensor network (MC-WSN) architecture for reliable and efficient information exchange. In conventional sensor networks with mobile access points (SENMA), the mobile access points (MAs) traverse the network to collect information directly from individual sensors. While simplifying the routing process, a major limitation with SENMA...
This paper considers architecture design of mobile access coordinated wireless sensor networks (MC-WSN) for reliable and efficient information exchange. In sensor networks with mobile access points (SENMA), the mobile access points collect information directly from individual sensors as they traverse the network, such that no routing is needed in data transmission. While being energy efficient, a...
Life time and Energy Efficiency are important factors in the design of wireless sensor network. A critical issue during data collection is the formation of energy holes near the sink. Sensors near the sink have to participate in relaying data on behalf of other sensors and thus their energy will be depleted very quickly. The mobile sink movement yields the significant performance gained through decreasing...
Recently, cognitive wireless sensor networks (CWSN) have been proposed to enhance the overall functionality of WSNs based on application needs. Cognition refers to the process of making decisions and acting based on the network conditions in order to achieve end-to-end goals of the network. In the previously proposed architecture, a new node — Cognitive Node (CN)-, which is responsible for managing...
Wireless sensor networks are a new type of networked systems, characterized by severely constrained computational and energy resources, and an ad hoc operational environment. Wireless sensor networks(WSNs) have been increasingly available for large-scale applications in which energy efficiency &, security is an important performance measure. Driven by the energy &, security limitation...
The application-oriented IoT is an integration of various kinds of technologies, rapidly developing in the globe. To ensure the quality its practical use, it is necessary to research its QoS architecture. We summarize QoS requirements through analysis of characteristic of IoT application service, transmission network, perception in this paper. Then we propose a QoS architecture based on IoT layered...
When an event occurs in an area observed by a Wireless Sensor Network, a vast amount of information is transferred towards the sink(s) of the network. This phenomenon may sometimes result into network congestion and as a consequence packets may start dropping due to queue overflows. To our knowledge most proposed reactions to this phenomenon utilize only static nodes whereas a few utilize mobile sink(s)...
In mission critical applications of wireless sensor networks (WSNs), multiple sinks can be associated to first responders such as firefighters, but also to unmanned aerial vehicles (UAVs). In such scenarios, data dissemination of events towards mobile sinks should be performed reliably. In this paper we present Honeycomb Architecture which enables data dissemination considering dynamic conditions...
Tactical communication systems are typically operated in disruptive networking environments. Such intermittent networking conditions present technical challenges in reliably delivering meaningful information to the appropriate destinations. This study proposes a reliable data aggregation and dissemination framework in the context of tactical networks. The framework takes a hybrid approach of combining...
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