Taein Hwang

Personal Mobile A/V Control Point for Home-to-Home Media Streaming

Existing home networking protocols such as UPnP are not ready to support media streaming services among home networks. Furthermore, a home router with NAT makes it difficult to provide such home-to-home networking services. Considering these constraints of real home network environments, we propose a personal mobile A/V control point that offers an extended home space so that users can freely control their own home and remote devices on their moving UPnP-enabled networks with zero configuration.

Architecture of home gateway for device collaboration in extended home space

Extended home space refers not only to home appliances but also to logical space, including a wide range of out-home personal devices such as mobile phones, PDAs, laptops, car navigators, and office PCs. Seamless networking and collaboration among these devices is essential to provide users with a ubiquitous home environment in which they can use home services whenever and wherever they want to. In reality, however, there are certain barriers to this, such as the dynamic IP address, NAT, and heterogeneous service protocols. In this paper, we propose a Home Gateway that provides unrestricted collaboration between personal devices in the extended home space by overcoming these barriers with P2P networking technology.

EAFR-based DLNA proxy for high-quality video distribution in extended home space

We propose a DLNA proxy for home-to-home content distribution that enables a source DLNA-compliant device to multicast a high-quality video to target ones in different UPnP-enabled home networks by applying a large-scale media distribution scheme to the DLNA architecture. The proposed EAFR scheme helps the DLNA proxy efficiently distribute overall network traffic load for a massive content delivered to the DLNA devices placed on different home networks by utilizing unused forwarding bandwidth on delivery paths, among them based on a multiple multicast trees approach.

Design and implementation of the home service delivery and management system based on OSGi service platform

Traditionally, the digital home services have been provided separately by each service providers that have closed service delivery infrastructure for delivering home services. Because of this, small companies that do not have the infrastructure to deploy home services have difficulties in participating in the home network market. To solve this problem, we propose the digital home service delivery system that provides open service delivery platform that small business companies need to provide various home services to users. By using the proposed system, the service aggregator using the proposed system can lead competition of the 3rd party service providers in the home network service market, and help it grow rapidly.

Desktop Migration System Based on Dynamic Linking of Application Specific Libraries

For the purpose of realization of the automated desktop migration environment based on dynamic linking of application specific library, we suggest a desktop migration system which supports application registration, global ID generation, application state management, and library management function. This system can save cost and time in generating a task description and developing application specific communication protocol, and also enables legacy applications to move their application states by supporting open delivery platform of application specific library

Design of an energy interoperation conformance test system using TTCN-3

We designed a system for Energy Interoperation conformance testing between an energy market and market participants based on TTCN-3. First, emerging energy markets for power trading are described. The previous works and the standards related to conformance testing of smart grid communication interfaces are introduced. After a brief overview of TTCN-3 standards published by ETSI, the functional architecture of TTCN-3 based EI conformance test system are designed. After showing its operation sequence and communication protocols, we summarize our works.

A Study on UPnP A/V Session Mobility Based on RFID

To ensure continuity of a UPnP A/V session following a users movement trajectory in the home, we designed a RFID-based UPnP A/V session manager. It automatically detects a users movement with an RFID reader, and captures or restores the states of playing A/V contents using the UPnP AVTransport service which defines a common model for A/V transport control. We present the functions and control flow operation of the designed session manager, and describe how its state is changed by the event messages generated by an RFID reader or its internal timer, and explain an algorithm for controlling access of multi-users at the same time.

Design and Implementation of the Automated Desktop Migration System Using RFID

To automatically move a mobile users desktop environment following his/her movement trajectory, we implement the RFID-based desktop migration system. This system automatically detects a users movement with a RFID reader, and then captures or restores application states by dynamically binding to an interface exported by application-specific libraries. We present the functional architecture of the implemented system, and define the protocols for advertising an application-specific library or delivering migration data. We describe how its state is changed by the events generated by a RFID reader or internal timer.