Jeonwoo Lee

Implementation of management agents for an OSGi-based residential gateway

This paper presents a concept of management agent and its implementing approach in an OSGi-based residential gateway. The role of management agent has been defined by OSGi (Open Service Gateway initiatives) alliance but the detailed interfaces have not been specified yet. In this paper, we propose servlet-based management agents and implement them to support their roles defined by OSGi specification. Implemented management agents consist of small function component, thus these can be extended easily according to the change of OSGi release.

The Strategy Development of u-Health Service

The healthcare environment is rapidly changing and is being transformed to meet new challenges aging and chronics. New opportunities by means of ubiquitous computing technologies are playing an increasingly important role in healthcare fields. As ubiquitous computing technologies are flowing into healthcare fields, various Korean healthcare organizations are eager to adopt these technologies, calling u-Health. However, it is difficult to realize these new technologies soon because there are many relevant stakeholders and hurdles to overcome. Unlike many existing technologies, u-Health has broad issues in the respect of dealing with peoples life. In this context, we offer an understandable picture for the successful development of u-Health projects in South Korea

U-health and regulatory implications in Korea

Ubiquitous healthcare, in short u-health, aims to provide overall healthcare anywhere, anytime based on ubiquitous technology. In Korea, with its wide wireless broadband coverage, various types of ubiquitous healthcare projects are being undertaken. First of all, this research analyzes the distinctive characteristics and general processes of u-health, and the detailed roles and ranges of the stakeholders are illustrated. Based on this analysis, three different types of service models are classified according to the stakeholder interactions: services between health experts, services between health experts and service consumers, and services between service consumers. We introduce the current commercial and experimental services and focus on understanding the corresponding regulatory issues that should be considered. Among the various regulatory issues, we selected privacy protection, medical treatment cost, and division between healthcare and wellness as the most significant problems. Then we consider the regulatory implications for each issue, and propose potential ways to continue under the domestic conditions in Korea.

Ontology-Based Context-Aware Service Engine for U-HealthCare

To offer a semantically suitable service for user in context-aware system, ontology concept is needed. By using the ontology, it is possible to provide knowledge sharing and support for syntactic and semantic interoperability. In this paper, we propose the context-aware service engine based on ontology. As we use ontology, our system has the following useful aspects. First, our system can describe types, hierarchies, relations of contexts, so that any context instance can be accommodated into the system with no additional effort. Seconds, as we design two levels ontology, any system which uses ontology could reuse our context ontology context in pervasive environment. Three, our system could be applied to semantic Web which is called a revolution of a post Web and could provide interoperability

A context aware system for personalized services using wearable biological signal sensors

In this paper, we propose a context aware system for personalized services using wearable biological signal sensors, by which a user can be provided with a personalized services via a user terminal device on the basis of information of userpsilas stress level derived from biological signals measured using biological signal sensors, and usage behavioral habits of services by a user. The system of this paper is composed of a user terminal device, wearable biological signal sensors, and service providers connected with a user terminal device through external public network. Wearable biological signal sensors are connected with a user terminal device via WPAN communication technology. Stress level of a user is calculated using biological signal sensor values when a service is selected and used by a user. And, userpsilas usage behavioral habits of a service are tracked, like usage time, usage duration, and usage frequency, etc. The gathered information is used to derive userpsilas preference of a service. By using the system mentioned above, a user can be provided with a personalized service which is given on most preferred time, and adjusted to fit a userpsilas preference. To show the feasibility of the proposed system, we apply the system to the music recommendation service.

Implementation of MPEG2-TS streaming system over wireless 1394 network

Wireless 1394 is an emerging technology for enabling wireless AV streaming. Wireless 1394 specification integrates the IEEE 1394 standard and the wireless access technology for broadband home networking. In this paper, we present the implementation of Wireless 1394 and MPEG2-TS streaming system over Wireless 1394 network. The implemented MPEG2-TS streaming system consists of a MPEG2-TS stream, a home server, a client PC, a wireless 1394 network and an UPnP based multimedia streaming application. The experimental results show that our system performs SD level MPEG2-TS streaming over wireless 1394 network successfully.

Wireless Network of Collaborative Physiological Signal Devices in a U-Healthcare System ∗

We designed and implemented collaborative physiological signal devices in a u-healthcare(ubiquitous healthcare) system. In this system, wireless body area network (WBAN) such as ZigBee is used to communicate between physiological signal devices and the mobile system. WBAN device needs a specific function for ubiquitous healthcare application. We show several collaborative physiological devices and propose WBAN mechanism such as a fast scanning algorithm, a dynamic discovery and installation mechanism, a reliable data transmission, a device access control for security, and a healthcare profile for u-healthcare system.