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Internet of Things (IoT) provides context-aware intelligent services through the various data and connected devices. Also, the Social Network Services (SNSs) accelerates the sharing information among user. In this situation, trust management is a key feature for reliable services. This paper discusses trust issues about IoT and SNSs. Also, we define the trusted cross-domain metadata model that consists...
Most services such as social network service, IoT service and media service are producing, consuming and spreading information based on human's relationships, activities and interests. Therefore, the relative information based service is required. But, it is difficult to utilize relative information because each service has own environment. Therefore, we propose cross-domain metadata environment which...
Internet of Things (IoT) devices are predicated to reach 50 billion by 2022. Therefore, the IoT device data is too large to be managed efficiently by the existing platforms. Because of huge data centralized on the IoT platform, the privacy issues are on the rise due to some sensitive data that able to expose secretly and indirect way. So, we propose the role-based IoT service environment that is decentralized...
The Social Internet of Things enables cooperation with devices in various domain networks to provide Internet of Things applications. But, as the number of relationships between humans or devices will increase dramatically, device generates a lot of messages when requesting data. Also, in the centralized manner, the server sends data individually to each device even if they need same data. It causes...
IoT service in home domain needs common and effective ways to manage various appliances and devices. So, the home environment needs a gateway that provides dynamical device registration and discovery. In this paper, we propose the IoT Home Gateway that supports abstracted device data to remove heterogeneity, device discovery by DPWS, Auto-configuration for constrained devices such as Arduino. Also,...
Service providers and manufacturers released their services and functions by open APIs in the Internet of Things (IoT) service environment. And, user wants to create their own IoT service that satisfies the diverse goals in their daily lives. But IoT service creation is difficult to a non-technical user, because the existing service creation environment is required programmable ability and analytical...
Context information processing is important to provide the Internet of Things (IoT) services. To do this, we use the ontology that is one of semantic technologies. In this paper, we design the ontology to process context information and provide context service. So, we propose the Generic Ontology Models (GOMs) for context service. Moreover, through the intelligent alarm service as the use case, we...
The existing service mash-up environment enables user to create context aware services. It is able to build services by recombining ready-made building blocks and connection operations. But a non-technical user is difficult to create context aware service. Because, they don't know principles of service offering (e.g., service platform architecture, concept of ontology, criteria of context, required...
Recently, data on the web has been increased by interactive service, social media and the pervasive computing technology. To utilize these huge data include sensor data, semantic sensor web service platform is needed. And it can provide the context-aware semantic web service. But, because sensor generated data is so dynamic, it can't always update and store. Therefore, we propose the distributed semantic...
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