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Recent advancement in ubiquitous healthcare evolves to new challenges in ubiquitous communications. Secure communication in wireless sensor networks (WSNs) is one of the important issues, especially, when WSN comes to ubiquitous healthcare, where security is main requirement in sensor devices, communication and continuous real-time monitoring of patient in hospital or home network. WSN requires efficient...
U-learning (ubiquitous learning) systems, which deliver learning materials anytime and anywhere, allow learners to watch live lectures on PDAs, tablet PCs and notebook computers via broadband and wireless Internet. These systems have various problems. The USB-based terminal system based on the OSGi(Open Services Gateway Initiative) service platform was designed as a ubiquitous system, in order to...
Web services technology is increasingly being considered as a promising solution to support the interoperability in ubiquitous computing environments. As many Web services with similar functionality are available on the Web, quality issues become important to distinguish a service from the competing services. In this paper, we propose a quality-driven Web service composition methodology for ubiquitous...
In this paper, we explain the context-aware and network-adaptive video streaming model in our intelligent ubiquitous middleware, SmartUM. We introduce a new method for controlling admissions of clients, extracting bit-streams, and allocating appropriate channels. The proposed method can save system and network resources through studies on scalable video coding techniques. Moreover, the outcomes of...
This work concerns the development of a fault model of sensor for detecting and isolating sensor, actuator, and various faults in USNs (Ubiquitous Sensor Network). USN are developed to create relationships between humans, objects and computers in various fields. A management research of sensor nodes is very important because the ubiquitous sensor network has the numerous sensor nodes. However, Self-healing...
In multi-agent system the goal is achieved by the collaboration of the agents. The communication between the agents over the existing network infrastructure is typically 'best effort', and as a result, the agents might receive different QoS. In this paper we propose a scheme supporting fair QoS for all the agents in the system. It is achieved by sensing the network condition and allocating different...
The recent issues in healthcare systems are the mobility of the patients to do their normal work and at the same time monitored frequently by their physicians to be aware of the current condition of the patient. This research presents the ubiquitous and intelligent framework which is an efficient integration of software and hardware components of the ubiquitous healthcare system. The focus of our...
For the last decade, the areas of e-business and e-service have expanded rapidly. Service oriented architecture (SOA) is introduced to create and execute business process on the Web. In SOA, the importance of managing the reputation ofservices has emerged. Thus, there has been much research to evaluate and manage the reputation of services. This paper proposes the context-aware distributed reputation...
Ubiquitous computing is a worthy environment for autonomic/pervasive computing between users and devices or between devices and devices. To realize ubiquitous computing, supporting seamless mobility ensures continuous services during inter-networking movement without meddling users. For seamless mobility in a heterogeneous networking environment, an adequate service/network configuration is necessary...
With the increasing use of small portable devices and wireless networks, a trend to support computing on the move has emerged. This trend is referred to as 'anytime/anywhere computing' for mobility support. In particular, multimedia service with heterogeneous devices, location-free access and user-context awareness is still a very active and evolving field of research in broad areas. In this paper,...
In this paper, the service-oriented device composer (SODC) is proposed to support ubiquitous service automation with considering QoS and resource management. A ubiquitous service is regarded as a distributed application carried out via the cooperation among a selected set of devices. Thus, it is essential to arrange the resource-limited devices for all requested ubiquitous services in a bandwidth-limited...
In this paper, we propose a group-aware service discovery architecture resolving conflict problem in ubiquitous computing. In the past, researches on resolving conflict have used service's QoS, user's preference, and user's intention. However, previous researches have the problem that it applies resolution scheme to non-conflicting situation because it does not consider space concept. Therefore, we...
Advanced pervasive transportation services aim to improve the safety and efficiency of public and private transportation facilities, while reducing operating costs and improving the travel experience for drivers, passengers and other travellers. In order to achieve these goals, such services require access to context information from a myriad of distributed, heterogeneous intelligent transportation...
Perception of a ubiquitous system is based solely upon sensor and device readings. The system decides to provide adequate services based upon these readings. We define a system of fault detection in the perception mechanism of a ubiquitous system based upon Bayesian networks and the combination of beliefs from independent networks. The proposed scheme is distributed and adequately suits the functioning...
Wireless mesh networks are a suitable technology for wireless broadband home networks which can expand into ubiquitous networks. In this paper, we introduce a home network architecture which is based on the multihop wireless mesh networks and provide a general overview of the architecture. The system model introduced might be helpful to set up self-organizing and self-configuring network for consumer...
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