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Wireless sensor network (WSN) is considered to be one of the most important research fields for ubiquitous healthcare (u-healthcare) applications. Healthcare systems combined with WSNs have only been introduced by several pioneering researchers. However, most researchers collect physiological data from medical nodes located at static locations and transmit them within a limited communication range...
In order to satisfy incremental business demands, it is often required to combine functionalities of several services together. The semantic web provides the infrastructure for composition of service functionalities, and it aims to create ontology-based and machine-process able the content. In addition, by applying semantic web technologies, many research works have been investigated to support automatic...
Ubiquitous Environments are defined that any user can discover and execute any service of any device in anywhere and at any time. In these days, there are many ubiquitous services such as Jini, DPWS, HAVi, and so on. They use different communication protocols and need different execution environments. Thus any ubiquitous service cannot find and execute ubiquitous services. Now days, lots of Bluetooth...
In ubiquitous environment intelligent and transparent services are provided to the users anytime and anywhere. Ubiquitous systems can be effectively implemented using the agent technology, while the agent platform supports efficient and stable interaction among the agents. In this paper we propose a load-balancing scheme which considers agent state for fair and efficient resource allocation to the...
Ubiquitous is defined that any users can discover and execute any services of any devices in anywhere and at anytime. Actually, there are many ubiquitous services such as Jini services, DPWS services and HAVi services. They support different communication protocol and have execution environment. It brings on some problems about discovery and binding of ubiquitous services. A user in one sub-network...
A wireless mesh network (WMN) is a promising technology for ubiquitous wireless access. IP mobility support is indispensable in large-scale WMNs. In this paper, we introduce a novel WMN architecture where Proxy Mobile IPv6 (PMIPv6) is employed as an IP mobility support protocol. Due to the tunneling procedure in PMIPv6, PMIPv6-based WMNs can lead to long packet delivery latency especially in voice...
In ubiquitous computing, clients should be able to use any kinds of services whenever and wherever they are. Service has the same quality without concerned with characteristics such as the status and location of services or devices. Because the characteristics are dynamically changed, a sub-network is difficult to reflect all the changes. So, there are various sub-networks. It is necessary to integrate...
In ubiquitous computing, client should be able to discovery and use any kind of services whenever and wherever they are. We need the service discovery protocol for realization of ubiquitous. This protocol must be reflex dynamic feature of ubiquitous such as service status and location. WS-Discovery, which support peer to peer environment, must find the service every time when the clients required...
The ontology has many merits, of which the most notable are the excellent extensibility, and high expression power. Thus, many systems in the Ubiquitous environment are developed using ontologies. Usually, ontologies are used for modeling context that the systems should collect and analyze. Also, they use only OWL and other ontology languages based on Description Logic, so can not properly handle...
Emerging ubiquitous computing network is expected to consist of a variety of heterogeneous and distributed devices. Web services technologies that support platform independent application integration cope with limitation of legacy middleware technologies based on distributed object. Therefore it could be software infrastructure for ubiquitous computing with other Web technologies. In this paper, we...
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