• Proceedings of the IEEK Conference
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• 2002.06e
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• pp.83-86
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• 2002

In this paper while a router is routing all packet to the next hop, it inspects whether there is congestion on this current hop router or not and if the router discovers that it has some congestion, it informs that the packet is experienced to congestion. The packet arrived to next hop including some information about the congestion is processed first and it has wider bandwidth than another packet The amount of congestion is recorded to the DS field of IP header by congestion experience level. In the next hop when the packet including the congestion information is routed, the standard packet dropping ratio of the current router is changed in proportion to congestion experience that is recorded in IP header on of that. When the packet that has experienced congestion before is arrived, the router extends the drop threshold value not to drop the packet. It mean that transferring the audio or video stream, if the packet is already experienced the congestion in another hop, the router can provide the better service quality about 15∼25% than another.

• Journal of applied mathematics & informatics
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• v.14 no.1_2
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• pp.343-351
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• 2004

In order to maintain load balancing in a distributed system, we should obtain workload information from all the nodes on network. This processing requires $O(v^2)$ communication overhead, where v is the number of nodes. In this paper, we present a new synchronous dynamic distributed load balancing algorithm on a (v, k ＋ 1, 1)-configured network applying a symmetric balanced incomplete block design, where $v\;=\;k^2$\;＋\;k\;＋\;1$. Our algorithm needs only $O(\sqrt[v]{v})$ communication overhead and each node receives workload information from all the nodes without redundancy. Therefore, load balancing is maintained since every link has the same amount of traffic for transferring workload information.

• Journal of Electrical Engineering and information Science
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• v.2 no.6
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• pp.162-166
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• 1997

A message server have two basic functionalities, a server role for processing the processing the user environment as well as an entity role for transferring message to other entity in message system environment. The user who is going to send and receive his important information really wants to keep his own security requests. To satisfy this requirement, message server must be enforced by two seperated security policies- one for message processing security policy under department's computer working environment, the other for send/receive security policy under message system's communication path environment. Proposed access control model gurantees the user's security request by combining constrained server access control and message system access control with multi upper bound properties which come from inheritance attributes of originating user security contexts.

• Proceedings of the KSR Conference
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• 2003.05a
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• pp.468-473
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• 2003

CCTV network has been implemented to transmit the image information of platfo gate and transfer section to local headquarters in the KNR(Korean National Railroa But. communication system for transferring image information around accident field has not been established yet. thus, at present implementation of communication equipment is necessary for dyn of unspecified accident to be transmitted to headquarters. Copper cable communication network is run by KNR, but it is processing installatio optics cable in connection with the implemental plan for high-speed network from n And, the capacity of communication channel will be guaranteed much more than een station and station, station and central headquarters when fiber optics cable is This study analyzes the image equipment of field for transmission and estimated m transmit image information of accident field to headquarters with using communicat ucture. And, the study considers implemental method of communication network for nce image transmission from dozens to hundreds kilometers.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.13 no.3
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• pp.110-116
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• 2005

TSA needs to be more transparent with the new passenger screening system and its functioning to build the citizen trust. The system is needed to be not only effective but supported by Congress and the general public. Until this occurs, skepticism will underlie any discussion about its effectiveness in balancing the protection from terrorism with respect to individual liberties. CAPPS II can be a viable system if it is developed appropriately. The objectives of the study are to introduce the security program in the U.S. aviation security policy and to discuss privacy problems when it applies. Korea also needs to study a harmonious plan with the basis of global approach mind in the case of considering the transferring of passenger information from other states for the purpose of security.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.2
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• pp.136-141
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• 2007

To produce eco marine products which is taking interests recently, the necessity of aquafarm tracing system is being emphasized. Considering the particularity of aquafarm, wireless communication environment is essential in order to manage aquafarm efficiently. The terminal which automatically collecting the environmental information and transferring it to server needs specified functions; input-output the information conveniently and search it visually. In this paper, we design specified terminal and its functions to monitor the environmental information at aquafarm.

• Proceedings of the KIEE Conference
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• 2003.07b
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• pp.1300-1302
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• 2003

CCTV network has been implemented to transmit the image information of platform, ticket gate and transfer section to local headquarters in the KNR(Korean National Railroad). But, communication system for transferring image information around accident field or wayside has not been established yet. thus, at present implementation of communication equipment is necessary for dynamic image of unspecified accident to be transmitted to headquarters. Copper cable communication network is run by KNR, but it is processing installation of optical cable in connection with the implemental plan for high-speed network from now on. And, the capacity of communication channel will be guaranteed much more than now between station and station, station and central headquarters when optical cable is completed. This study analyzes the image equipment of field for transmission and estimated matters to transmit image information of accident field to headquarters with using communication infrastructure. And, the study considers implemental method of communication network for long-distance image transmission from dozens to hundreds kilometers.

• Journal of Information Management
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• v.28 no.1
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• pp.34-61
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• 1997

This study suggests that the model of electronic document delivery service be carried out by academic libraries step by step, based on the analysis of the domestic and foreign status. The model consists of the user's request step, electronic document building step, electronic document transferring step. Academic libraries should perform the electronic document delivery service step by step that satisfies user's information need.

• Annual Conference of KIPS
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• 2011.04a
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• pp.949-952
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• 2011

현재 IPv4 에서 IPv6 로의 전환은 매우 시급한 상태이다. 하지만 IPv6 로의 전환에 앞서 IPv4 에서 제기되었던 많은 보안 문제점이 IPv6 로의 전환에 걸림돌이 되고 있다. 차세대 인터넷 구축에 반드시 필요한 IPv6로의 변환 과정에 있어, 기존의 IPv4 와 IPv6 의 서로 다른 방식으로 인한 이질성으로 예상치 못한 보안상 문제점들이 드러나고 있다. 본 논문에서는 IPv4 에서 IPv6 로 전환 시 발생할 수 있는 보안상 위협에 대해서 분석한다. 또한 터널링 방법에서의 패킷 헤더 변조 공격을 방지하기 위해 패킷 무결성 검증에 의한 패킷 필터링 방법과 IPv4 주소 할당 방법에 있어 주소 할당 서버의 IP pool 주소 고갈 공격 문제를 해결하기 위한 방안을 제시 하였다.

• International Journal of Computer Science & Network Security
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• v.24 no.2
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• pp.155-157
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• 2024

Internet of Things (IoT) integrated with the Blockchain is the state of the art for keen cultivation and agriculture. Recently the interest in agribusiness information is enlarging owing to the fact of commercializing the smart farming technology. Agribusiness information are known to be untidy, and experts are worried about the legitimacy of information. The blockchain can be a potential answer for the expert's concern on the uncertainty of the agriculture data. This paper proposes an Agri-Banana plant system using Blockchain integrated with IoT. The system is designed by employing IoT sensors incorporated with Hyperledger fabric network, aims to provide farmers with secure storage for preserving the large amounts of IoT and agriculture data that cannot be tampered with. A banana smart contract is implemented between farmer peer and buyer peer of two different organizations under the Hyperledger fabric network setup aids in secure transaction of transferring banana from farmer to buyer.