무선 ATM망에서의 동적 대역폭 할당 알고리즘에 대한 QoS 성능 연구

류기훈,김지연,전광탁,양해권 군산대학교 정보통신기술연구소 2000 情報通信技術硏究論文集 Vol.4 No.-

In the network with small cell radius, a mobile terminal which has large mobility should perform frequent handover. This requires that handover mechanism must be done fastly. As cell size is smaller, signal power level is lower Handover is implemented by the network to give the users freedom of motion beyond a limited wireless coverage area while they are communication. The handover is procedure by which a user's radio link is transferred from one radio port to another through the network without an interruption of the user collection. The currently existing method for handover uses an algorithm, in which the bandwidth corresponding to the adjacent cells is supposed to be allocated. However, this method leads to the problem of requiring bandwidth allocation for many-unknown cells, due to the lack of information toward moving direction in mobile terminal. In this paper, we propose an efficient dynamic bandwidth allocation algorithm for solving those problem above, based on both path rerouting handover and soft hangover mechanism with wireless ATM. Thus, only the bandwidth for corresponding adjacent cell, that is from estimation, is chosen to be reserved; this method drastically reduces the waste of bandwidth, and improves the efficiency in performance. Comparing with static bandwidth allocation algorithm, the proposed algorithm make a bandwidth allocation more efficient. As for the QoS, it has been shown that proposed algorithm shows better performance than that with static bandwidth allocation algorithm.

무선 ATM에서의 동적 대역폭 할당 알고리즘에 대한 QoS 성능 연구

류기훈,전광탁,양해권 한국정보통신학회 2001 한국정보통신학회논문지 Vol.5 No.3

무선 ATM망에서는 무선 접속으로 인하여 단말의 이동성이 발생하는데, 단말기는 이동 중에도 호의 끊임없이 QoS를 보장하면서 연속적인 서비스를 제공받을 수 있어야 한다. 사용자 및 이동성의 증가와 작아지는 셀 크기로 인하여 핸드오버는 빈번해질 것이다. 무선 ATM망에서 핸드오버 발생시 멀티미디어 서비스를 제공하기 위해서는 한정된 무선 대역폭을 인접 셀에 해당 대역폭을 예약하는 것이 주류를 이루었다. 그러나 단말기의 이동 방향을 알지 못함으로써 불특정 다수의 셀에 대역폭을 예약하는 것이 문제점으로 지적되었다. 그래서 이동 단말기의 이동 방향을 추정하여 추정된 셀에만 대역폭을 예약하는 방법을 제안하게 되었다. 본 논문에서는 소프트 핸드오버 방식을 사용하면서 이동 방향을 추정하여 추정된 셀에만 대역폭을 예약하는 방법을 사용하여 시뮬레이션을 통해 이전의 알고리즘과 QoS 성능을 분석하였다. In the network with small cell radius, a mobile terminal which has large mobility should perform frequent handover. This requires that handover mechanism must be done fastly. The currently existing method for handover uses an algorithm in which the bandwidth corresponding to the adjacent cells is supposed to be allocated. However, this method leads to the problem of requiring bandwidth allocation for many-unknown cells, due to the lack of information toward moving direction in mobile terminal. In this paper, we propose an efficient dynamic bandwidth allocation algorithm for solving those problem above, based on both path rerouting handover and soft handover mechanism with wireless ATM. As for the QoS, it has been shown that proposed algorithm shows better performance than that with static bandwidth allocation algorithm.

Shock에 對한 組織 Alkaline Phosphatase의 反應에 關한 實驗的 硏究 : 特히 過敏性 Shock를 中心으로 하여

劉基薰 부산의대 1964 부산의대잡지 - 부산대학교 의과대학 Vol.4 No.2

FDBA (Fuzzy Dynamic Bandwidth Allocation) Algorithm에 대한 성능 연구

류기훈,양해권 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-

In the network with small cell radius, a mobile terminal which has large mobility should perform frequent handover. This requires that handover mechanism must be done fastly. The currently existing method for handover uses an algorithm, in which the bandwidth corresponding to the adjacent cells is supposed to be allocated. However, this method leads to the problem of requiring bandwidth allocation for many-unknown cells, due to the lack of information toward moving direction in mobile terminal. In this paper, we propose an efficient dynamic bandwidth allocation algorithm for solving those problem above, based on both path rerouting handover and Fuzzy theory with wireless ATM. As for the QoS, it has been shown that proposed algorithm shows better performance than that with static bandwidth allocation algorithm.

전면 개정 공정거래법의 전망에 대한 고찰 - 대법원 2013두 25924를 중심으로

류기훈(Ki Hoon Ryu) 경희법학연구소 2022 KHU 글로벌 기업법무 리뷰 Vol.15 No.1

대학가의 피시방을 방문해보자. 첫 번째 피시방도 40분에 1000원, 두 번째 피시방도40분에 1000원, 피시방 사장님들끼리 약속이라도 한 듯 가격이 일치하는 것을 알 수 있다. 우리는 소비활동을 하며 ‘비슷한 가격’을 익숙하게 목격한다. 가령 동네 짜장면 가격은 어느 지역을 가나 비슷하다. 가격이 비싸지 않다면 우리는 흔쾌히 이 ‘가격’에 수긍할것이다. 그러나 가격이 갑자기 비싸게 느껴진다면 ‘왜 이렇게 다 같이 올랐지?’라는 생각이 드는 것이 자연스럽다.… With the full Amendment of Korean Competition Law, attention is focused on whether the attitude of Supreme Court, which have been strict about the proof of collusion, will change. In this study, after examining the judgment trends of the Supreme Court focusing on the ramen collusion case, it is meaningful to conceptualize the ‘Dogma of Agreement’ formed by the Supreme Court in general and to examine future prospects through it. As a result of comparing cases of the United States and Europe and modeling collusion from an economic point of view, it was found that the Supreme Court has a strict dogma similar to the criminal law when dealing with competition law. In particular, it can be seen that, despite sufficient economic incentives, it far exceeds economic rationality and has an attitude that is strongly wary of type I errors. Therefore, the results of this study predict that despite the full Amendment of Korean Competition Law, which made it easier to prove agreement, it will still be difficult to prove collusion. Furthermore, according to this prospect, I would like to discuss that the economic analysis, which has functioned as a secondary factor, becomes important in advance, and the proof of collusion will be decided depending on it.

가공법의 본질과 이익균점권

류기훈(Ki-Hoon Ryu) 경희법학연구소 2023 KHU 글로벌 기업법무 리뷰 Vol.16 No.1

현재 노동법은 노동권의 본질을 격하시키고 종속노동을 심화시키는데 기여하고 있다. 본 연구에서는 가공의 법리를 중심으로 자본과 노동간의 관계를 수학, 철학, 사회, 경제, 통계, 인류, 법학, 역사, 행정학, 정책학, 정치, 경제발전론, 진화심리학의 측면에서 원초적으로 바라보았다. 그 결과 최선의 상태에서 벗어난 현실을 이끌어내고, 가공의 법리가 전혀 적용되지 않는 기업주의의 문제를 지적한 후, 노동법의 패러다임을 바꿀 연구방법론을 제시하고, 구체적으로 이익균점권을 검토하였다. 따라서 본 연구결과는 점진적인 이익균점권의 확대를 통해 점차 수익성이 개선되며 정치적 정당성을 확보할 수 있을 것이라는 전망을 제시하였다. The current labor law is contributing to downgrading the essence of labor rights and deepening dependent labor. This study looked at the relationship between capital and labor in terms of mathematics, philosophy, society, economy, statistics, humanity, law, history, public administration, policy studies, politics, economic development theory, and evolutionary psychology, focusing on Specification legal principles. As a result, a reality out of the best was brought out, and after pointing out the problem of corporateism to which Specification legal principles are not applied at all, a research methodology to change the paradigm of labor law was presented, and the profit sharing area was specifically reviewed. Therefore, the results of this study suggest that profitability will gradually improve and political legitimacy will be secured through the gradual expansion of the right to share the profit for labor

법률분야에서 Chat GPT

류기훈(Ki-Hoon Ryu) 경희법학연구소 2023 KHU 글로벌 기업법무 리뷰 Vol.16 No.2

무선 ATM망에서 이동성 지원에 따른 QoS 성능 연구

류기훈(Ki- Hun Ryu),김지연(Ji- Yeoun Kim),전광탁(Koang-Tak Jeon),양해권(Hae- Kwon Yang) 한국통신학회 2000 한국통신학회 학술대회논문집 Vol.2000 No.11

이차원바코드를 이용한 공문서 위ㆍ변조 방지 확인 시스템 제안

류기훈(Ki-Hoon Ryu),임선영(Seon-Yeong Lim),한희일(Hee-il Hahn) 한국지능정보시스템학회 2007 한국지능정보시스템학회 학술대회논문집 Vol.2007 No.11월

이차원바코드 기술과 암호화 알고리즘을 이용하여 문서의 위ㆍ변조 등을 방지하고 문서의 상태를 기업체나 공공기관 등에서 쉽게 확인하여 판단할 수 있는 시스템을 제안한다. 모든 위ㆍ변조 확인이 필요한 문서에 암호화된 이차원바코드를 첨부한다. 확인자 측에서는 첨부된 이차원 바코드를 바코드 리더기로 인식하거나 이차원 바코드의 사진을 관련 인터넷 웹 사이트를 통해 문서의 위ㆍ변조를 판단한다.

요추 추간판 탈출증에서 내시경의 추궁간 도달법을 이용한 경피적 요추 추간판 제거술의 결과 - 내시경적 후궁제거술 -

김응하,류기훈,김정관 대한척추외과학회 2008 대한척추외과학회지 Vol.15 No.4

Study Design: Retrospective study Objectives: This study examined the post-operative results of interlaminar percutaneous endoscopic lumbar discectomy (PELD) with or without endoscopic laminotomy in lumbar disc herniation. Summary of Literature Review: In addition to the technical feasibility, the indications of PELD surgery are usually the same as those for open discectomy. Materials and Methods: From January 2005 to August 2006, 62 cases treated with PELD using an interlaminar approach due to lumbar disc herniation were examined. The mean age of the subjects was 40.1 years (18-70) and the mean follow up period was 32.6 months (24-44). Thirty-four and 28 herniated discs were extracted from L4-L5 and L5-S1, respectively. The clinical results were evaluated using MacNab’s criteria. Results: The herniated discs were accessible in all cases. Excellent and good results were obtained in 85% (53 cases) of patients but 15% of patients (9 cases) showed unsatisfactory results or needed revision. There were 4 cases of incomplete removal, 2 cases of recurrence and 4 cases of persistent low back pain due to associated degenerative pathologies. Additional surgery was required in 7 cases which were open discectomy in 5 cases (3 cases of 4 incomplete removal and 2 of recurrence). There was one case of PLIF and 1 additional decompression. Cauda equina syndrome occurred in one case who underwent subsequent wide decompression and open discectomy. Conclusions: interlaminar PELD using endoscopic laminotomy is an effective method for treating lumbar disc herniation with moderate up and down migration. The clinical success rate can be improved by selecting patients with accessible discs and excluding those with an associated pathology.