Hae Won Jung

Electronics and Telecommunications Research Institute | ETRI · PEC

A chemical sensor using metal nano-particles and a method for manufacturing a chemical sensor using metal nano-particles are provided. The chemical sensor includes: metal nano-particles; single-ligand organic molecules (or a single molecule) that binds to the metal nano-particles by using a metal bonding functional group; a substrate bonding functi...

Information and Communication Technology (ICT) sector was observed to emit 2 to 2.5% of GHG among the total GHG emission. However, it is predicted that ICT sector will be one of the major GHG sources as it could be reach to 10 to 15% of the total emission by the increased use of ICTs on our life and many sectors. Major International standard bodies...

Routers configure their paths based on the Link State Database (LSDB) in order to meet service requirements and Quality of Service (QoS) guarantee. Internet routing can be categorized into intra domain routing and inter domain routing, and QoS should be guaranteed both at the intra and inter domains for end-to-end QoS guarantee. The LSDB can be eas...

In the Internet, in order to guarantee Quality of Service (QoS), all routers have to manage their Link State Databases (LSDBs) and determine a routing path that satisfies service requirements based on the LSDB. In addition, routing protocols have to provide QoS not only in the intra- domain but also in the inter-domain to enable the end to end QoS...

A seamless handover scheme with low latency and low packet loss is important to maintain TCP performance of mobile users. Several solutions have been proposed such as hierarchical mobile IPv6 (HMIPv6), fast handover protocol for mobile IPv6 (FMIPv6), seamless handoff architecture for mobile IP (S-MIP), ..., however, the overall handover latency is...

With the rapid development of wireless technologies, the need to support moving hosts of IPv6-based mobile networks in ubiquitous environment is growing. So the demand for delay sensitive applications, such as multimedia stream, VoIP, that requires increasingly seamless handover. Various well-known approaches to optimize the handover latency have b...

Demand for wireless data service glows faster in mobile network. In all-IP base network expected to be introduced, the mobile IPv6 (MIPv6) appeared to provide mobility. With fast handover and optimization of the link layer (L2), MIPv6 goes faster. But MIPv6 does not provide sufficient handover speed and it charges the burden of calculation to compa...

Routers determine a routing path considering network topology and link state information for guaranteeing quality of service (QoS). Therefore, it is important that routers should know link state information so as to calculate a routing path. However, if routers generate link state update messages inordinately, their router performance may be reduce...

As a next generation service, immersive media is the most attractive one, which is indispensable for supporting human tele-presence and virtual lab. The immersive media service requires high standards on interactive response delay and synchronization among media for comfortable communication in users' perspective. To measure the customer's experien...

In this paper, we will survey and classify researching advanced routing algorithms that take advantages of MPLS (multiprotocol label switch) network to extent routing algorithms, supporting QoS (quality of service) services and traffic engineering and load balancing. We also consider some recent projects that are researching and working with advanc...

There have been a lot of research and investigation to improve handover latency of mobile IPv6 (MIPv6). The handover latency is one of the most important factors because performance of TCP flows as well as realtime traffic degrades sharply as the latency increases. The MIPv6 handover process consists of movement detection, duplicate address detecti...

In the global Internet, a constraint-based routing algorithm performs the function of selecting a routing path while satisfying some given constraints rather than selecting the shortest path based on physical topology. It is necessary for constraint-based routing to disseminate and update link state information. The triggering policy of link state...

A novel approach to describe the relation, in terms of probability, between the gain obtained by multiplexing the traffics in the packet network and the link capacity for guaranteeing the required quality is proposed. A traffic flow is defined as the on-off stream described with the probability distribution of the on-off lengths. With the statistic...

The current Internet protocol (IP)-based networks face tremendous requirements such as quality of service (QoS) guarantees, efficient traffic engineering (TE), network scalability, and high network performance, in accordance with the emergence of diverse Internet services. A constraint-based routing path is determined based on network topology and...

Traffic measurement is required to protect network from abnormal traffic that is created by attacking or computer virus. Traffic measurement and flow information exporting method have being standardized and partially introduced. But traffic measurement devices and flow exporting software have still too low performance to collect all flows. Recently...

A dynamic bandwidth allocation (DBA) scheme, an inter-optical network unit (ONU) bandwidth scheduling, is presented to provide quality of service (QoS) to different classes of packets in Ethernet passive optical networks (EPONs). This scheme, referred to as TADBA, is based on efficient threshold reporting from, and adaptive polling order rearrangin...

Not Available

The gigabit Ethernet switch is already being deployed in large numbers in both corporate and public data networks, and has begun to move Ethernet from the region of the local area network out to encompass the metro area network. Meanwhile, an even faster 10-gigabit Ethernet standard was completion on June 2002. The main issue for 10-gigabit Etherne...

This investigation evaluated the MB810 and the 8B/10B line codes used in optical Ethernet systems. Compared with the 8B/10B, the MB810 has the advantage of a sharp shape of the optical carrier frequency component and Nyquist bandwidth. These advantages make it possible to compensate for optical transmission impairments such as dispersion and distor...

This paper reviews the existing research activities on signaling and control procedures for IP over optical networks. We focus on the IP-centric signaling and control architecture based on the generalized multi-protocol label switching (GMPLS) protocol and analyze various scenarios and technical issues for deploying the IP over an optical network....

A frequency offset compensation method for OFDM-FDMA, that can correct offsets after the DFT via circular convolution, is proposed as an alternative to the direct method that corrects frequency offsets by multiplying the complex exponents of the offset estimates before the DFT. In contrast to the direct method whose complexity increases proportiona...

The 10-Gigabit Ethernet (10GbE) is emerging as an alternative for solving the bottleneck of wide area network (WAN) links. Currently, the choice of line codes is being an issue in the 10GbE standardization. We review the candidates for the 10GbE line code, and propose a new line code, MB810, for 10GbE. Its spectrum is bounded within the Nyquist ban...

A frequency offset compensation method for OFDM-FDMA, that can correct offsets after the DFT via circular convolution, is proposed as an alternative to the direct method that corrects frequency offsets by multiplying the complex exponents of the offset estimates before the DFT. In contrast to the direct method whose complexity increases proportiona...

The IEEE802.11a wireless LAN standard was released at July, 1999. The 5GHz band wireless LAN RF Front End transceiver is designed in accordance with IEEE802.11a standard and implemented with discrete RF components. In this paper, we present the structure, design and characteristics measurement of the implemented RF transceiver. The characteristics...

The advanced information technology (IT) will promote the transformation of communities the world over into an information society and a knowledge-based economy in the next generation. During the past years, the explosive growth of the Internet's popularity has brought a great number of changes in the telecommunications area. The current Internet P...