• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2004년도 춘계학술발표대회
• /
• pp.1421-1424
• /
• 2004

본 논문은 IPv6의 보급확산을 위해서 추진된 NCA의 IPv6 웹 포탈사이트 구축을 통해 정의된 시스템 아키텍처를 소개하며, S/W, 네트워크, 하드웨어의 실질적인 구축 사례를 제시한다. 그리고, 이와 같은 웹 서비스 제공을 통해 일반 이용자를 IPv4에서 IPv6로 유도할 수 있는 효과적인 서비스 정책과 시스템 구현 기술을 보여준다.

• 지식경영연구
• /
• 제17권2호
• /
• pp.1-26
• /
• 2016

As entry barriers at the legal service market in Korea have been recently lifted, the legal service market has dramatically changed from a seller's market to a buyer's market. Externally, the Korean legal service market has been open to foreign law firms and internally, lawyers graduating from law schools have been increasing. In addition, as even the general public can easily access, through the official sites of government organizations, to the basic legal information such as laws and judicial precedents, the degree of information asymmetry has also decreased. These phenomena require the legal service industry to be a more client-oriented and more quality-oriented one. Having said that, legal service providers also need to continue to make strenuous efforts to measure and improve the service quality from the customers' perspective. Under these circumstances, this study introduced a certain type of model which may be of help of measuring and improving the quality of legal service of law firms, in particular, with a focus on those firms providing corporate legal service. This study used a Quality Function Deployment (QFD) in order to measure and thereby improve the quality of corporate legal service in the law firm industry. Above all, this study showed, by using SERVQUAL, each and every service attributes of quality measurement of the corporate legal service and also calculated the degree of importance of service quality at each process of providing corporate legal service. Next, this study introduced all supporting factors necessary for the provision of corporate legal service and calculated the degree of importance of each and every supporting factors in the service process. This study may be of help to provide the substantial and systematic approaches to the corporate legal service providers who would like to set up a certain methods of measuring and further improving the quality of corporate legal service from the customers' perspective.

• 정보처리학회논문지C
• /
• 제13C권2호
• /
• pp.195-202
• /
• 2006

센서 네트워크를 실생활에 적용하기 위해서는 보안 서비스가 반드시 같이 제공되어야하며 보안에 있어서 핵심은 노드 간에 안전한 통신을 가능하게 하는 pairwise 키 설정이다. 본 연구에서는 센서 네트워크를 사전에 클러스터링하고 각 클러스터에 헤드를 두어 기본적인 정보는 사전에 예측된 배치정보에 의해 배분하고 노드 배치 후 실제적으로 이웃 노드를 파악하여 정보가 필요한 노드들만이 클러스터헤드에게 해당 정보를 요청하는 메커니즘을 제안한다. 제안 메커니즘은 클러스터헤드가 좀 더 많은 정보를 사전 분배받는 대신 일반 노드의 메모리 부담을 훨씬 줄였으며 불필요한 정보를 분배하지 않음으로써 노드 포획 시에도 이에 대한 저항성을 높여 보안성을 한층 강화할 수 있을 뿐 아니라 모든 이웃 노드 간 직접키 설정을 보장함으로써 효율적인 키 설정과 통신이 가능하다.

• 한국컴퓨터정보학회논문지
• /
• 제28권12호
• /
• pp.105-114
• /
• 2023

본 논문은 모바일 IAB를 향한 UxNB 네트워크 배포 및 운영 방안을 제안한다. SDN(Software Defined Network) 기반으로 UxNB 네트워크를 운영하여, 이동 통신 서비스를 원하는 지역에 UxNB를 배포한다. 서비스 지역에 UxNB를 배포한 후, IAB를 설정하여 이동 통신 서비스를 수행할 수 있다. 이를 위해 본 논문에서는 먼저 UAV 컨트롤러(UAV controller)와 SDN 컨트롤러(SDN controller)로 구성되는 UxNB 네트워크 컨트롤러(UxNB NC; UxNB network controller)를 제안하고 필요한 기능들을 기술한다. 다음으로 UxNB 네트워크를 배포하고 운영할 수 있는 시나리오를 단계별로 상세하게 제시한다. 또한 UxNB 네트워크 컨트롤러의 위치, UxNB에 대한 UAV 컨트롤러 제어 명령 전달 방법, UxNB 네트워크를 위한 IAB 적용 방법, UxNB 네트워크의 최적화, UxNB 네트워크의 RLF(radio link failure) 복구 및 UxNB 네트워크의 보안(security)에 대한 향후 연구를 논한다. 제안한 UxNB NC 아키텍처와 UxNB 네트워크 배포 및 운영 방안을 이용하여 모바일 IAB에 UxNB 네트워크를 원활하게 통합할 수 있을 것으로 기대한다.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2006년도 하계종합학술대회
• /
• pp.107-108
• /
• 2006

In order to meet the customers'emerging demands for more bandwidth and diverse IP multimedia applications including high definition(HD) video streaming service, KT presents innovative FTTP solution using WDM-PON system. FTTP comprises an OLT inside the central office, a fiber optic distribution network including a passive remote node in the outside plant, and ONU installed on the pole or wall of customers premise. The passive remote node is located in a manhole near the subscribers and does not require any electrical power supply. And finally, UTP cable is connected from ONU to subscribers'IP appliances like PC or HGW or IP-STB. KT finished its FTTP trial service in 2004 and commercial deployment has begun since 2005. With this FTTP solution, each subscriber can enjoy high-speed internet service with speeds of up to symmetric 100 Mbit/s and various IP media applications including HD quality IP video streaming service and high quality video phone service.

• 한국정보보호학회:학술대회논문집
• /
• 한국정보보호학회 2003년도 동계학술대회
• /
• pp.669-685
• /
• 2003

Nowadays mobile phones and PDAs are part and parcel of our lives. By carrying a portable mobile device with us all the time we are already living in partial Pervasive Computing Environment (PCE) that is waiting to be exploited very soon. One of the advantages of pervasive computing is that it strongly supports the deployment of Location-Based Service(s) (LBSs). In PCE, there would be many competitive service providers (SPs) trying to sell different or similar LBSs to users. In order to reserve a particular service, it becomes very difficult for a low-computing and resource-poor mobile device to handle many such SPs at a time, and to identify and securely communicate with only genuine ones. Our paper establishes a convincing trust model through which secure job delegation is accomplished. Secure Job delegation and cost effective cryptographic techniques largely help in reducing the burden on the mobile device to securely communicate with trusted SPs. Our protocol also provides users privacy protection, replay protection, entity authentication, and message authentication, integrity, and confidentiality. This paper explains our protocol by suggesting one of the LBSs namely“Secure Automated Taxi Calling Service”.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제15권12호
• /
• pp.4364-4384
• /
• 2021

The dynamic network state and the mobility of the terminals make the service function chain (SFC) orchestration mechanisms based on static and deterministic assumptions hard to be applied in SDN/NFV mobile edge computing networks. Designing dynamic and online SFC orchestration mechanism can greatly improve the execution efficiency of compute-intensive and resource-hungry applications in mobile edge computing networks. In order to increase the overall profit of service provider and reduce the resource cost, the system running time is divided into a sequence of time slots and a dynamic orchestration scheme based on an improved column generation algorithm is proposed in each slot. Firstly, the SFC dynamic orchestration problem is formulated as an integer linear programming (ILP) model based on layered graph. Then, in order to reduce the computation costs, a column generation model is used to simplify the ILP model. Finally, a two-stage heuristic algorithm based on greedy strategy is proposed. Four metrics are defined and the performance of the proposed algorithm is evaluated based on simulation. The results show that our proposal significantly provides more than 30% reduction of run time and about 12% improvement in service deployment success ratio compared to the Viterbi algorithm based mechanism.

• 한국인터넷방송통신학회논문지
• /
• 제24권2호
• /
• pp.15-21
• /
• 2024

본 연구의 목적은 일반적인 서비스 뿐만 아니라 공공정책 등에 인공지능 서비스를 도입할 때, 어떤 단계를 통해 진행하고 점검할 수 있는지 방안에 대해 제안을 하고 있다. 이를 위해 인공지능 서비스 관리와 거버넌스 툴킷에 대해 제시하고 공공정책에 인공지능 서비스를 제공할 때, 어떻게 해야 하는지에 대한 내용을 연구하였다. 첫째, 인공지능 서비스의 개발 방향과 개발하지 말아야 할 내용에 대한 지침을 제공하고 있다. 둘째, 개발을 하는 경우 인공지능 거버넌스툴킷에서 제공하고 있는 설계, 개발, 배포단계별로 검토해야 하는 체크 리스트를 통해 내용을 점검 후 진행하는 것을 권장하고 있다. 셋쨰, 인공지능 서비스를 운영할 시 1) 기획설계, 수명주기, 3) 모델 구축 및 검증, 4) 배포 및 모니터링, 5) 책임에 대한 각각 원칙과 관련 내용을 명확히 제시하고 이에 충족하고 있는지에 대해 점검을 해야 한다. 인공지능서비스의 거버넌스 측면은 궁극적으로 제공되는 서비스에 대한 위험 측면을 완화하려는 노력으의 일환이므로 등장할 수 있는 위험관리 측면에서도 연구가 이루어져야 한다. 우리는 인공지능에 제공하는 장점을 수용하면서 한계 및 위험요소에 대한 적극적인 대응 방안으로 마련해야 한다. 인공지능 기술을 적극적 활용하여 효율적으로 정책 수립하여 고부가가치를 생성하고 사회에 의미 있는 영향을 제공할 수 있도록 노력해야 한다.

• ETRI Journal
• /
• 제40권3호
• /
• pp.318-329
• /
• 2018

Femtocell (FC) technology envisaged as a cost-effective approach to attain better indoor coverage of mobile voice and data service. Deployment of FCs over macrocell forms a heterogeneous network. In urban areas, the key factor limits the successful deployment of FCs is inter-cell interference (ICI), which severely affects the performance of victim users. Autonomous FC transmission power setting is one straightforward way for coordinating ICI in the downlink. Application of intelligent control using soft computing techniques has not yet explored well for wireless networks. In this work, autonomous FC transmission power setting strategy using Adaptive Neuro Fuzzy Inference System is proposed. The main advantage of the proposed method is zero signaling overhead, reduced computational complexity and bare minimum delay in performing power setting of FC base station because only the periodic channel measurement reports fed back by the user equipment are needed. System level simulation results validate the effectiveness of the proposed method by providing much better throughput, even under high interference activation scenario and cell edge users can be prevented from going outage.

• 산업경영시스템학회지
• /
• 제33권3호
• /
• pp.22-29
• /
• 2010

Six sigma has been the most influential management innovation tool in order to achieve the customer's satisfaction and keep the competition in the age of limitless competition. The success in six sigma is to find the correct CTQ (Critical to Quality). QFD (Quality function deployment) is the efficient too ever created to tie product and service design decisions directly to customer wants and needs. One of the mistakes in QFD is to analyze using an inconsistent HOQ (House of quality) chart. An inconsistent HOQ chart is one in which the information from the correlation matrix is inconsistent with that from the relationship matrix. This study presents the consistency check and inconsistency check in case of failing the consistency check. Also we propose the procedures using the Limiting Probability in correlation matrix and the Median Rank in relationship matrix in order to be consistent in HOQ chart.