• Information and Communications Magazine
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• v.21 no.8
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• pp.122-128
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• 2004

광대역 통합망 (BcN)은 통신, 방송, 인터넷을 동시에 수용하는 미래기간 인프라로 정부의 IT 8-3-9 전략의 일환인 3대 첨단망 구축의 핵심이 되는 기간 망이다. 이러한 BcN을 서비스 관점에서 이해하자면, 유선, 무선, 인터넷, Wireless LAN, 방송 등의 망기반위에 All-IP에 기반 한 서비스가 Virtually 하나의 Network로 통합되어 제공되는 개념으로 볼 수 있다. BcN을 둘러싼 제반 환경은 시장, 기술, 고객 Needs, 데이터 서비스 관점에서 아래와 같이 예상할 수 있다.(중략)

• Proceedings of the IEEK Conference
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• 2003.07d
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• pp.1327-1330
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• 2003

The internet SCSI(iSCSI) disk has been studied as a storage system which can be directly connected to TCP/IP network. We designed and implemented a shared disk following the iSCSI protocol and providing cache consistency. It is named as intelligent iSCSI(i$^2$SCSI) disk. The i$^2$SCSI disk provides cache consistency of all blocks that belong to the disk using a conventional lease method and it uses 'contiguous blocks-level locking' The prototype of the i$^2$SCSI disk emulator and its client is designed and implemented in Linux 2.4.

• MALSORI
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• no.51
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• pp.137-149
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• 2004

A weather forecast service with speech recognition is described. This service allows users to get the weather information of all the cities by saying the city names with just one phone call, which was not provided in the previous weather forecast service. Speech recognition is implemented in the intelligent peripheral (IP) of the advanced intelligent network (AIN). The AIN is a telephone network architecture that separates service logic from switching equipment, allowing new services to be added without having to redesign switches to support new services. Experiments in speech recognition show that the recognition accuracy is 90.06% for the general users' speech database. For the laboratory members' speech database, the accuracies are 95.04% and 93.81%, respectively in simulation and in the test on the developed system.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1545-1549
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• 2005

According as computer is supplied in a lot of homes and offices and Internet use increases, various service based on the Internet. Including wireless PDA in the future, many devices such as Internet telephone, TV, refrigerator and oven will be connected on the Internet and Internet address exhaustion will be raised to serious problem gradually. Today, the IPv4 address exhaustion problem has been solved partially using NAT (Network Address Translation) however, the transition to next Generation Internet will be accelerated because of advantages such as mobility, security service, QoS, and abundant IP addresses. In IPv6, all hosts are designed to create and set their address automatically without manager's intervention using Neighbor Discovery Protocol. But, when an IPv6 host sets its address automatically, there are serious security vulnerabilities. In this paper, we analysis security vulnerabilities in auto-configuration and provide security requirements for secure auto-configuration.

• Journal of Communications and Networks
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• v.4 no.4
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• pp.282-291
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• 2002

3GPP (Third Generation Partnership Project) is defining UMTS (Universal Mobile Telecommunication System) releases which span the transition from GSM/UMTS coexistence to All-IP UMTS networks. The deployment of an UMTS network depends, in the first place, on the intended service offerings and the release an operator chooses to start service with. Other key decisions in-fluencing UMTS deployment relate to the timing of the functional enhancements and capacity increases along the economic life of the network. This paper gives an overview on the architectural and technical options for UMTS deployment. It also outlines the methodology underlying the business plan aimed at estimating the returns from investments in the UMTS infrastructure, thus helping to tune operators’ strategies for UMTS deployment.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.136-138
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• 2003

인터넷은 이미 대중화되어 있으며, 이러한 인터넷 망을 기초로 한 All-IP 망으로의 망 진화에 대한 논의가 활발하게 진행되고 있다. 또한 현재 상용중인 IPv4에 이동성을 부여한 이동 인터넷(Mobile IPv4)에 대한 연구는 IETF(Internet Engineering Task Force)를 중심으로 활발하게 진행 중에 있으며, 이에 대한 구현 및 개발은 이미 많은 연구단체에서 많은 성과를 보여주고 있다. 본 논문에서는 3세대 이동통신 모델 중의 하나인 CDMA2000 1x 환경에서 기 구현된 Wire-less LAN에서의 이동 인터넷(Mobile IPv4)을 연동하여, 이기종 망(Heterogeneous Network)에서의 이동 인터넷(Mobile Ipv4) 모델을 제시한다. 제시된 이동 인터넷(Mobile IPv4) 프로토콜은 Layer-2망으로서 Wireless LAN과 CDMA2000 1x을 모두 사용하며, 하부 망(Layer-2 Network)의 변화에 능동적으로 반응하여, 통신을 유지한다.

• The KIPS Transactions:PartC
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• v.9C no.6
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• pp.875-882
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• 2002

The active packets unlike traditional IP packets should be executed at each active node along their path. To execute the active program at each active node, the active packets for an active program should go through the same active nodes and all packets are delivered without any loss. This paper presents the new active engine for every active packet which execute an active program to be routed through the same intermediate active nodes and to be delivered reliably. Proposed active engine requires fewer changes to existing IP protocols and guarantees the reliable delivery of the active packets. Moreover, even if the sender does not have any information about the intermediate nodes every active packet is routed through the same intermediate active nodes. The simulation results show that proposed active engine achieves an efficient transmission with high data delivery and low communication overhead compared with the other existing transmission protocols.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.113-125
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• 2019

This research aims to understand the common psychological features of consumer. And master the direction of the development of the network novels derivation by analysis the TV plays adapted from network novels in China's IP industry. To this end, This research determine to analyzed consumer adoption attitude the Behavior Intention of derivative products. The date were collected from 612 Chinese people, from October 15 to October 22 2018. Statistical analysis were through SPSS 21 after data coding and data cleanings process. This research performed frequency analysis exploratory factor analysis, Independent sample t-test, one-way ANOVA, post-analysis Duncan test, correlation analysis and mass regression analysis. The research results are as follows. Firstly, the characteristics(topicality, empathy and interest) of network novel TV play positively related role in the adoption attitudes(cognitive attitude and emotional attitude) of derivatives commodities. At the same time, identity has a more positively related influence than topicality and interest. Secondly, all the characteristics of network novels consisting of topicality, identity and interest play positive related roles in the behavioral intentions of derivative commodities. Thirdly, emotional attitude plays a more positively related role in purchasing intention and recommendation intention compared with cognitive attitude. It is hoped that the research results can play a fundamental role in the production and development of network novels derivatives.

• Proceedings of the Korean Society for Quality Management Conference
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• 2007.04a
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• pp.334-339
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• 2007

인터넷은, 전화로 대변되는 과거의 정보통신 서비스와는 달리 사회 전반에 막대한 영향력을 행사하는 서비스로 발전하였다. 인터넷에 대한 의존도는 향후 모든 정보통신서비스가 인터넷을 기반으로 제공되는 All-IP 디지털 컨버전스 시대에 더욱 더 심화될 것이다. 이 경우 오늘날의 인터넷보다도 QoS(Quality of Service)에 관한 이슈가 더욱 중요해질 것은 자명하다. 이러한 배경에서 ITU(International Telecommunication Union)나 IETF(Internet Engineering Task Force)등의 국제표준화 기구에서 차세대 인터넷 (Next Generation Network, NGN)에 대한 QoS 문제를 연구하고 있다. 그러나 이들 국제기구는 주로 기술공학적인 측면에서 QoS 문제에 접근하고 있어서 현실적으로 완전한 대안을 제공하지는 못하고 있다. 즉, 인터넷 산업의 특성상 사업자간 끊김없는 연동(seamless inter-operations)과 협력이 필수적인데, 이는 기술공학적 측면보다도 비즈니스 및 정책적 관점에서 다루어져야 되기 때문이다. 통신 사업자 및 벤더(vendor)의 글로벌 컨소시엄으로 출발한 TMF(TeleManagement Forum)나 QuEST Forum 등의 역할이 중요해지는 이유가 여기에 있다. 이미 이들 단체는 사업자간 합의에 의해 자발적으로 구축한 NGOSS 및 TL9000 인증시스템을 바탕으로, 망사업자를 비롯한 서비스공급자 및 벤더 등과의 원활한 협력관계를 구축하는 글로벌 de facto 표준을 마련한 바 있다. 본 연구에서는 QoS 보장을 목표로 하는 차세대 인터넷(NGN)의 현실적 성공 가능성을 높이기 위한 글로벌 표준화 노력을 소개하고 이들을 비교/검토한다. 특히, ITU 및 IETF 등의 NGN 개발계획을 비즈니스/정책점 관점에서 보완할 수 있는 TMF와 QuEST Forum의 접근법을 고찰하여, All-IP 컨버전스 환경에서의 QoS 이슈에 시사하는 바를 살펴본다.

• Journal of Communications and Networks
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• v.10 no.3
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• pp.258-267
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• 2008

In this paper, we examine what changes the next-generation wireless communication systems will experience in terms of the technologies, services, and networks and, based on that, we investigate how the inter-cell interference management should evolve in various aspects. We identify that the main driving forces of the future changes involve the data-centric services, new dynamic service scenarios, all-IP core access networks, new physical-layer technologies, and heavy upload traffic. We establish that in order to cope with the changes, the next-generation inter-cell interference management should evolve to 1) set the objective of providing a maximal data rate, 2) take the form of joint management of power allocation and user scheduling, 3) operate in a fully distributed manner, 4) handle the time-varying channel conditions in mobile environment, 5) deal with the changes in interference mechanism triggered by the new physical-layer technologies, and 6) increase the spectral efficiency while avoiding centralized coordination of resource allocation of the users in the uplink channel.