Youn-Kwae Jeong

An integrated home server for communication, broadcast reception, and home automation

This paper presents a home server integrating communication, digital broadcast reception, and home automation applications. The home server has a CPU of high performance, and an MPEG decoder as a PCI slave device, and a MPEG2 TS distributor to convey simultaneously three HDTV channels which may go their way from terrestrial, satellite, and cable tuners to the next destination equipment via Ethernet port and PCI bus. We also present the architecture of MPEG2 TS distributor.

An implementation of FTTH based home gateway supporting various services

HG (home gateway) is an interface device that connects an access network, WAN (wide area network), to a home network. FTTH (fiber to the home) based HG is an HG with FTTH network as an access network interface. In this paper, we propose an implementation of FTTH based HG, specially EPON (Ethernet passive optical network) based HG. With the FTTH access network interface, the proposed HG can provide service bandwidth of 100 Mbps to 1 Gbps to each subscriber. The amount is enough bandwidth to provide various home network services for each one. Our proposed HG has a novel architecture with various home network interfaces and can use efficiently the abundant bandwidth for the various services.

A network level power management for home network devices

This paper proposes a network level power management based on the energy-aware plug and play (EPnP) for home network devices. The power management can reduce the power consumption of devices by reconfiguring power control elements of each device depending on a service collaborating with many devices in the home network. It also can reduce the power consumption of devices without user intervention by the EPnP technique. It can maximize a power reduction by a fine grain power control based on the power control elements that are functional elements of a device which is related with a specific home network service. The proposed power management showed that it was very effective when a service works together with many devices that have multi-function in ubiquitous home environment .

An Implementation of the Broadband Home Gateway supporting Multi-Channel IPTV Service

Home gateway (HG), called residential gateway (RG) in other words, is a device that interconnects various home electronic devices to one another as well as connects these private home network devices to exterior public network. There are various types of digital home services in IP (Internet protocol)-based home network system; data service, entertainment service, security service, home automation service and so on. Multimedia related service, especially IPTV (Internet protocol television) service, is the attractive one to customer in these home network services. In this paper, we show the implementation of the broadband home gateway supporting multi-channel IPTV service. The proposed and implemented home gateway has an architecture that can provide multi-channel, more than three channels, HD (high definition) class IPTV service with 20 Mbps (megabits per second) bandwidth for each channel. For the improved IPTV service using IP multicast, the proposed HG uses Internet group multicast protocol (IGMP) proxy and IGMP snooping protocol. The proposed HG consists of two main components, system processor for NAT (network address translation) processing and system software functions and an L2 (layer 2) Ethernet switch to interface access network and network distribution in intra-home network. The multicast packets for the multi channel IPTV service go from ingress port for access network interface to egress ports for home network directly based on L2 multicast MAC (medium access control) table in L2 Ethernet switch without via the system processor of the HG. This paper specifies in detail the system structure and implementation of hardware, firmware and software for the proposed HG

Proactive energy management system architecture interworking with Smart Grid

Most of the energy management systems only implement monitoring and statistics of energy data which is collected from smart meter or consumer electronics. Under these energy management systems, people should manually control each device to reduce energy consumption. Moreover, The Smart Grid Technology requires more complicated and smart energy management system such as demand response related energy load control, renewable energy management, micro power exchange system. This paper will focus on architecture of energy management system for interworking with smart grid system. We have already developed energy management system for green-home and green-building, which has various monitoring and analysis functions about power consumption of home-appliances and building facilities. We are going to implement the smart grid interworking functions based on architecture concept which introduced in this paper.

A mechanism of ontology-based rule management for smart building energy saving service

This paper describes a mechanism of ontology-based rule management for building energy saving service. For the purpose of providing ontology-based building energy saving service in buildings, rules are needed to control equipments in buildings. A Rule manager adds new rules and searches, changes and deletes existing rules. This paper describes an ontology-based rule manager to offer energy optimization services for buildings.

Profile-based building energy saving service in green computing environment

This paper describes a profile-based of building energy saving service in green computing environment. Building profile is used to provide appropriate services for building energy efficiency. As each building has a variety of contextual information, including the buildings properties and circumstances, this paper proposes a method to present profile-based building contextual information and to offer energy optimization services according to each buildings properties.

A QoS Provisioning Technique in a Residential Gateway using Heterogeneous Network Access Technology

We propose a packet scheduling algorithm for an efficient transmission in a residential gateway used in the home network. The packet scheduling algorithm is modeled by the hybrid method that is a QoS technique based on the parameterized QoS method and the prioritized QoS method. We applied the prioritized QoS technique to earliest deadline first scheme. We proposed a QoS parameter mapping scheme that can be used in the home network using the heterogeneous access technology. We also proposed the fairness scheme for IEEE 1394. The access technologies such as IEEE 802.11 WLAN, IEEE 1394, and Ethernet are considered for the QoS algorithm mapping scheme. Finally, we evaluate the performance of the proposed QoS provisioning technique by using the simulation. The simulation results show that the proposed schemes are a good candidate for the home network.

A Rule-Based Ontology Reasoning System for Context-Aware Building Energy Management

Global energy demand grows rapidly. The building sector accounts for about 20% of worlds energy consumption. Intelligent and systematic energy management technologies have been increasingly exploited to reduce the energy use in the building sector. Previous studies used their own decision model including knowledge-bases and rules. However, they are lack of a structural framework for organizing information and a form of knowledge representation as a set of concepts in the building energy domain. To enhance a framework and knowledge representation, we adopt ontology. Furthermore, ontology can provide reasoning functionality and context-awareness. We propose a rule-based ontology reasoning system that provides context-awareness. In the proposed system, we design an ontology model for building energy management and make reasoning rules from the knowledge-bases of accumulated building energy saving measures. The proposed system detects energy waste context and provides energy saving measures to eliminate the energy waste context. We implemented the proposed system on a real office building. The implemented ontology reasoning system diagnoses the context of the target building and presents the energy saving measures simultaneously. By use of building energy simulation, the amount of energy saving is estimated when the energy saving measures are applied. The simulation result shows the positive effect of our proposed rule-based ontology reasoning system.

An approach for knowledge cloud service using ontology-based BEMS.

Preparing for the energy crisis, many research and development are underway to reduce the energy consumption and consume the energy more efficiently. BEMS (Building Energy Management System) is one of the essential technologies for saving the energy in the field of building. Commonly, existing BEMS is operated and controlled by the system operators or energy experts manually and also provides limited services that are dependent on the particular environment. To solve this limitation, this paper describes an approach for knowledge cloud service using ontology-based BEMS.