Hoon-Ki Lee

Implementation of the DLNA Proxy System for Sharing Home Media Contents

The paper proposes a methodology to provide services for accessing and sharing various media contents securely, those are distributed over consumer electronics (CEs) in the home network. To do so, we propose the DLNA proxy system (DPS) architecture which helps to gather various media information available from the distributed AV devices in the home and to share the media contents across the public IP network via established secure channels. The proxy system is implemented on the home server which acts as media server and the hardware accelerated IP security (IPSec) virtual private network (VPN) is configured on the home gateway which establishes and maintains secure connections between the home and public networks.

Design of an Extended Architecture for Sharing DLNA Compliant Home Media from Outside the Home

This paper proposes an extended DLNA media sharing architecture as a methodology to provide services for accessing and sharing various media contents distributed over DLNA-capable devices, via not only a home network but also the Internet. The proposed architecture helps users search and view media contents distributed in the DLNA-networked home from public IP networks. Our architecture uses the SIP in order to transmit messages of information exchange between DLNA-capable devices within and outside of the home and to support secure user-authentication. The proposed system was implemented on a home server that acts as a gateway for establishing connections between the home network and external networks.

The DLNA Proxy System Architecture for Sharing In-Home Media Contents via Internet

This paper proposes a digital living network alliance (DLNA) proxy system, to provide services for accessing and sharing various DLNA-based media contents which are distributed over his/her or others home facilities via home network or the Internet

Design and Implementation of the Location-Based Personalized Social Media Service

Although the conventional Social Network Services (SNS) provides a solution for internetworking social users to share information and social media contents based on the Web, there are further requirements to support increasing demands of social users with commencing Web 2.0 and ubiquitous computing technologies. Especially with increasing popularity of the User Created Contents (UCC) and handheld mobile devices, there are requirements for supporting active media streaming services with smart phones based on the personalized SNS services. In order to overcome the limitations of the traditional SNS services, the paper proposes methods to provide a personalized Social UCC service based on the locality and sociality relations with relationship, active information and knowledge management based on the ontology schemes. To do so, the paper proposes and implements a social media platform that composed of GPS equipped smart phones, a social media server system, and an integrated service ontology for providing the personalized Social UCC service.

Personalized Recommendation System for the Social Network Services Based on Psychographics

Although various Social Network Services available on the Web, there are additional requirements for sharing systematic knowledge and experiences that are formed in u-Computing environment in relation to the physical location information to support problem solutions more effectively. As the numbers of information available increases, there are more inadequate and junk information which consume efforts and time for information search and sharing. In order to support personalized social network services, there are technical and service oriented requirements for managing and providing accumulative experiences of social users according to their own knowledge and life-style. Such social network services generally implements a recommendation system that provides services based on user history and profiles including statistics information for service customization. Therefore there is probability of producing irrelevant information results because of the fact that the conventional recommendation system does not consider to support a dynamic generation of the context information of users. In order to overcome accuracy problems for the conventional recommendations, the paper proposes a personalized recommendation system using psychographics information, which explains users lifestyle.

Provision of the Personalized Social Network Service Based on the Locality/Sociality Relations

Although the conventional Social Network Services (SNS) provides a solution for internetworking social users to share information and social media contents based on the World Wide Web (WWW), there are additional requirements to support increasing demands of social users with commencing Web 2.0 and ubiquitous computing technologies. In order to overcome the limitations of the traditional SNS services, there needs to be fundamental technologies for supporting locality and sociality relationship management, active information and knowledge sharing schemes, digital community management, social user management based on ontology system. Among those limitations of the conventional SNS, the paper proposes a method to provide a personalized SNS service based on the locality and sociality relations with relationship, active information and knowledge management based on the ontology schemes. To do so, the paper initially proposes a social messenger and relationship management system for communication and active information sharing respectively.

Provision of the Social Media Service Framework based on the locality/sociality relations

Although the conventional Social Network Services (SNS) provides a solution for internetworking social users to share information and social media contents based on the World Wide Web (WWW), there are additional requirements to support increasing demands of social users with commencing Web 2.0 and Semantic Web technologies. The paper introduces a methodology to provide the Social Media Service Framework (SMSF) in order to overcome the limitations of the traditional SNS services and to support the fundamental semantic web technologies including locality and sociality relationship management, active information and knowledge sharing schemes, digital community management, social user management based on ontology system. Based on the proposed service framework, the paper implements a method to provide a personalized SNS service based on the locality and sociality relations with user relationship, autonomous information and knowledge management based on the ontology schemes. To do so, the paper initially proposes a social messenger and relationship management system for communication and active information sharing respectively.

Provision of the mobile video conference system for the ubiquitous home network

Disruptive IP technologies have reached critical mass and as a result, the home network is increasingly being affected by ubiquitous computing technologies. Although there are various emerging communication tools available including video and voice conferencing over IP network, the paper provides a mobile video conference solution for the ubiquitous home network. To support service mobility, the SIP and Zigbee sensor technologies are implemented on the proposed home server system. Consequently, when a user move to another location, while the video conference session is established, the nearest home server detects Zigbee signals and locates user of physical location in order to process call forwarding and to maintain the video conference sessions.

VPW: An Effective Personal Space Model for Providing Ubiquitous

User-centrism is one of the most important things in ubiquitous computing. Previously, lots of researches have addressed issues for ubiquitous computing, but most of them oversimplified a personal space as a set of devices in a fixed location or in a communication-ranged space. Thus, they have had a problem to describe sophisticated user-centric services. In this paper, we propose an effective personal space model called VPW (virtual personal world) for providing ubiquitous services. VPW includes various objects over several locations, tasks in progress, and proxies of other users. Thus, service provision based on VPW supports more delicate user-centric adaptation, use of multiple devices spread over locations, and harmony between multiple users and multiple services. Eventually, it increases user satisfaction in providing ubiquitous services. Experimental results show the VPW-based approach increase user satisfaction by around 20% compared to the location-based approach and by around 15% compared to the range-based approach

Providing of SoT collaboration system for interworking with smart home devices

Recently, various smart devices are interconnected within the home network environment and such smart home support collaborations between those devices based on the Web of Things (WoT). The evolving concept of the WoT in the smart home network not only provide a simply control by users either within or outside of the home, but requires to support ubiquitous accessibility and sharing resources. Current smart home users are expanding their activities simply from ones dwelling environment to the social network and such phenomenon requires a new way of approaches to support Web of Things available. In the conventional smart home environment, the interoperability issues including UPnP and DLNA and the media sharing were mainly focused regarding the approaches for accessing heterogeneous home devices. The recent changes and requirements are based on the collaboration services based on the social network information for searching and interoperating various objects. The paper introduce a concept and applications of “Social web of Things” (SoT) for supporting device to device collaborative services based on the social relationship information of users for controlling and sharing the web based objects in the home network environment.