• The KIPS Transactions:PartC
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• v.9C no.5
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• pp.749-756
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• 2002

As Internet access through mobile devices is increasing, Mobile IP is the protocol to provide the mobility of a host on the existing IP. It is important to provide secure authentication when mobile node register with home agent through the foreign agent each time it moves. In this paper, we propose the authentication mechanism using a regional registration. The proposed authentication mechanism reduce frequent home registration in regional movement. The simulation results show that the proposed authentication reduces the total registration time and is more efficient than conventional registration mechanism.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10c
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• pp.523-525
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• 2000

최근의 무선 네트워크의 급속한 발전으로 이동 컴퓨팅 분야도 IMT-2000 기술과 더불어 전세계 어디에서든지 위치에 상관없이 Mobile IP 프로토콜과 같은 이동성을 지원하는 IP 프로토콜을 통해서 인터넷에 접속할 수 있는 환경을 제공하게 될 것이다. Mobile IP 환경에서 MH(Mobile Host)는 이동하는 도중에도 인터넷에 접속을 유지하려면 자신의 care-of address가 변경될 때마다 이동한 셀의 FA(Foreign Agent)를 걸쳐서 HA(Home Agent)에게 등록하는 과정을 계속해서 수행해야 한다. 만약 MH의 FA와 HA간의 거리가 먼 경우에는 등록하는 시간이 길어질 것이며, 그만큼 인터넷에 접속되는 시간이 지연되어 인터넷 서비스가 늦어질 것이다. 본 논문에서는 MH의 FA와 HA와의 거리가 먼 경우에 지역적인 등록을 통해서 등록 지연 시간을 줄일 수 있는 동적인 지역적 등록 기법을 제안한다. 이러한 동적인 지역적 등록 기법은 MH의 등록 지연 시간을 줄이며 MH의 매끄러운 핸드오프(smooth handoff) 기능도 지원하여 핸드오프 기간동안의 패킷 전송 오류를 줄일 수 있는 기법이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.11C
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• pp.1-9
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• 2001

The Mobile IP protocol allows IP hosts to move between different networks without changing their IP addresses. The Mobile IP systems supporting the local registration were introduced to reduce the number of times when a home registration with the remotely located Home Agent is needed. The local registration Mobile IP protocol enhanced the performance by processing the MN\`s registration requests at a local agent. However. the local registration approach may consider other aspects of the Mobile IP systems as the FA fault tolerance. In this paper, we will briefly review previous protocols to support the FA fault tolerance in hierarchical local registration Mobile If system and will propose a fault tolerance protocol with backup FA in hierarchical local registration mobile IP t() enhance the efficiency of such systems against Foreign Agent failures.

• Journal of the Korean Institute of Telematics and Electronics T
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• v.35T no.2
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• pp.81-85
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• 1998

Location Registration and deregistration is necessary to mobility management in a Mobile Communication networks when a mobile phone moves between location registration areas. After considering several deregistration schemes, a sample scheme that eliminate network traffic is chosen. However, this scheme may delete valid registration record, so the size of location registration database must be sufficiently large to ensure low probability that a valid records are deleted. This paper describes an analytic model to determine the size of location registration database for a location registration area in this simple scheme. The simulation results of analytic model show that the size of database must 3-5 times than the expected number of mobile phones in a location registration area.(Mobile, Communications, Location, Deregistration, Database)

• Journal of Korea Multimedia Society
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• v.7 no.1
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• pp.106-112
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• 2004

Mobile IP is a solution for mobility on the global Internet. However, it causes service delay incase of frequent movement of mobile node and mobile users. Mobile IP regional registration is Proposed to reduce the service delay. In this paper, we introduce an optimal regional location management mechanism for Mobile IP that reduces the registration delay. The movement of mobile node is described by a discrete analytical model. The proposed model explains analytically average packet rate and registration cost as the size of regional networks with mobility of mobile node.

• Journal of Korea Society of Industrial Information Systems
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• v.11 no.2
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• pp.1-8
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• 2006

In this paper, we propose a distance-based location registration scheme and evaluate it's performance in a mobility model. We compare performance of the distance-based registration scheme to that of zone-based registration scheme at the mobility model. Numerical results show that the registration load of the distance-based registration with call arrival is similar to that of the zone-based registration, and is equally distributed to all cells in a location area. So the proposed scheme can be effectively used in the limited radio resources.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.35 no.3
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• pp.125-132
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• 2017

Even after applying an image registration, Very High Resolution (VHR) multi-temporal images acquired from different optical satellite sensors such as IKONOS, QuickBird, and Kompsat-2 show a local misalignment due to dissimilarities in sensor properties and acquisition conditions. As the local misalignment, also referred to as Registration Noise (RN), is likely to have a negative impact on multi-temporal information extraction, detecting and reducing the RN can improve the multi-temporal image processing performance. In this paper, an approach to fine registration between VHR multi-temporal images by considering local distribution of RN is proposed. Since the dominant RN mainly exists along boundaries of objects, we use edge information in high frequency regions to identify it. In order to validate the proposed approach, datasets are built from VHR multi-temporal images acquired by optical satellite sensors. Both qualitative and quantitative assessments confirm the effectiveness of the proposed RN-based fine registration approach compared to the manual registration.

• KOREAN POULTRY JOURNAL
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• v.37 no.3 s.425
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• pp.103-105
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• 2005

옛부터 국내 재래닭은 우리나라 국민들의 식성에 알맞는 독특한 맛과 육질로 인하여 가든이나 토속 음식점 등에서 고가로 판매되면서 입지를 굳혀오고 있다. 일부 지역에서는 지역 특성에 맞는 브랜드를 상품등록하여 소비자들로부터 신뢰를 받는 농가들도 늘어가고 있다. 이런 가운데 축산연구소(소장 윤상기)에서는 빠르면 금년말 국내 순수 혈통을 자랑하는 재래닭이 상품등록을 마치고 공식 탄생할 예정이다. 축산연구소 가금과(과장 이덕수)는 이미 10년에 걸친 재래닭 복원작업을 마치고 3월중 특허청에 재래닭 3개 계통(흑색, 황갈색, 적갈색)에 대해 등록출원 준비를 마친 상태이다. 상표등록이 이루어질 경우 철저한 가계선발과 사양관리를 통해 고정된 국내 유일의 재래닭을 국제적으로 알리고 국내 소비자들에게 재래닭의 참맛을 전달하게 될 것으로 기대를 모으고 있다.

• 한국공간정보시스템학회:학술대회논문집
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• 2007.06a
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• pp.233-239
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• 2007

현행 지적도에는 건물 위치가 표시되지 않아 지적도 활용 시 건물 위치 식별이 어렵고, 지적현황측량에 따른 비용과 시간의 소요와 불편을 격고 있으며, 지상 건물의 경계 침범으로 인한 분쟁과 소송이 일어나고 있다. 건축물 경계 추출에 관한 선행연구에서 수치정사사진과 LiDAR를 이용한 건물 경계를 추출은 원칙적으로 지적측량의 원리와 상이한 기준으로 실제 지상의 외벽 경계선이 아닌 건축물의 옥상층 경계선을 추출하였다. 따라서 본 연구에서는 건물등록을 위해 시도해 보지 않았던 건축도면을 이용하여, 기존연구에서 고려되지 못한 지붕선이나 처마선이 아닌 실제 지적측량에서 기준이 되는 외벽의 경계선을 등록하기 위해 건축도면을 활용하였으며, 등록하는 과정에서 ArcGIS 엔진을 이용하여 개발한 자동 등록 방법을 사용하였다. 지적도 필지 경계선과 건축도면의 필지 경계선을 기준으로 등록한 결과 지적현황측량 성과와 수치지역에서 연결오차로 RMSE가 0.10m, 도해지역에서 0.16m로 나타났다. 따라서 건축도면을 이용하여 지적도에 건축물의 경계를 등록함으로써 지상측량을 보완할 수 있으며, 3차원 지적구축을 위한 기반을 조성하고, 지적재조사사업에서 시간과 경비를 획기적으로 절감할 수 있을 것이다.

• Journal of Preventive Medicine and Public Health
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• v.31 no.2 s.61
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• pp.310-322
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• 1998

In order to reinforce the role of primary care physician and o improve doctor-patient relationship, the Korean government tried to introduce 'Family Doctor Registration Program' into Seocho-Gu in Seoul, Ansung-Gun and Paju city in Kyunggi-Do in Oct. 1996. Community residents and doctors in those area did not show much interest in this project because of low incentives. We have done this study to see how much people know 'Family Doctor Registration Program' and what is people's real needs about 'Family Doctor Registration Program'. We selected 1,800 telephone numbers in Seoul, Chongju city, and Ansung-Gun by multi-stage stratified random sampling. Three trained survey personnels called them and got answers to the premade questionnaire until they completed the questionnaires of 200 persons in each community. The calling time was 7-9 p.m. from Monday to Friday, 3-9 p.m. on Saturday, and 9 a.m. to 9 p.m. on Sunday. We dropped out the persons who did not respond 3 times. The subjects consisted of 222 male and 367 female residents. Their ages ranged from 20 to 78: 24.8% in their 30s, 23.4% in their 20s, 22.5% in their 40s in male, and 35.2% in theirs, 22.5% in their 40s, 18.5% in their 20s in female. 9.9% of male and 13.2 % of female had their Family Doctors. The specialties of their Family Doctors were internists in 56.2%, general surgeons in 11.0%. The persons who did not have their family doctors were asked which doctors they would prefer if they had choices of family doctor. The results were internists in 50.3%, family physicians in 13.0%, pediatricians in 4.8%. Only 16.0% residents knew that government tried to introduce Family Doctor Registration Program. The 'Family Doctor Registration Program' was not well known to people. The results of our study showed that more effective incentives and public notifications are needed to activate this program.