• 정보기술과데이타베이스저널
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• 제8권2호
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• pp.41-60
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• 2001

Despite the growth in Internet users, demand for multi-medial, large data files and resulting explosive growth in data traffic, there has been lack of investment in Middle-Mile, interconnection of various networks, resulting in bottleneck effect, which is acerbating. One strategy to overcome such network bottleneck is Content Delivery Network (CDN). CDN does not achieve efficient delivery of large file data through physical improvement/increase in network capacity, but by delivering large file contents, the cause of bottlenecks, from distributed servers. Since it is impracticable to physically improve networks capacity to accommodate the growth in internet traffic, CON, by strong CPs contents at cache servers deployed at major ISPs networks, is able to deliver requested contents to the requesting Web clients without the loss of data and long latency.

• 정보처리학회논문지C
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• 제19C권1호
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• pp.29-38
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• 2012

최근 급속도로 보급되고 있는 스마트폰과 SNS(Social Network Service)로 인한 인터넷 응용프로그램 활용의 증가는 3G 네트워크 이상의 네트워크 대역폭을 빠르게 잠식해가고 있으며 이로 인한 속도 저하와 서비스 질 저하로 인한 기간통신사들의 시설투자비 증가 요구가 강하게 대두되고 있다. 아울러 모바일 네트워크 사용자의 폭증에 따르는 모바일 서비스 제공자와 모바일 네트워크상의 ID관리문제를 촉발하고 있다. 본 논문은 3G 네트워크에서 모바일 인터넷 응용 서비스상의 사용자 ID관리와 보안문제를 해결하기 위한 프로토콜로 제안된 IDM3G[1]를 기반으로 보다 향상된 인증관리 프로토콜을 제안한다. 제안하는 $I^2DM$ 프로토콜은 기존의 IDM3G 프로토콜이 MO를 통한 상호 인증을 수행하면서 발생시키는 부하를 모바일 인터넷 응용 서비스 제공자에게 일정 부분의 역할을 분산시킴으로써 모바일 및 서비스 제공자의 ID관리와 함께 네트워크 부하와 정보처리를 위한 프로세스 부하 그리고 송수신되는 패킷의 수를 보다 효율화한다. 향후 더욱 그 수요가 폭증할 것으로 예상되는 3G 이후의 모바일 네트워크에 대한 수요를 대비하여 보다 최적화된 프로토콜을 제안한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권7호
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• pp.2589-2609
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• 2021

Segment routing (SR) is a highly implementable approach for traffic engineering (TE) with high flexibility, high scalability, and high stability, which can be established upon existing network infrastructure. Thus, when a network failure occurs, it can leverage the existing rerouting methods, such as rerouting based on Interior Gateway Protocol (IGP) and fast rerouting with loop-free alternates. To better exploit these features, we propose a high-performance and easy-to-deploy method SRUF (Segment Routing under Uncertain Failures). The method is inspired by the Value-at-Risk (VaR) theory in finance. Just as each investment risk is considered in financial investment, SRUF also considers each traffic distribution scheme's risk when forwarding traffic to achieve optimal traffic distribution. Specifically, SRUF takes into account that every link may fail and therefore has inherent robustness and high availability. Also, SRUF considers that a single link failure is a low-probability event; hence it can achieve high performance. We perform experiments on real topologies to validate the flexibility, high-availability, and load balancing of SRUF. The results show that when given an availability requirement, SRUF has greater load balancing performance under uncertain failures and that when given a demand requirement, SRUF can achieve higher availability.

• 정보학연구
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• 제8권3호
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• pp.131-142
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• 2005

The principles on which the Internet was designed and has evolved were first laid out in an explicit way 20 years age. The basic principle is that in layered communications network such as the Internet, functions should always be implemented at the end systems whenever the option exists. This applies to all functions that can be implemented either in the network or at the end systems. End-to-end arguments have recently been reexamined as the Internet and its uses have evolved, and a new set of requirements has begun to emerge. In addition to these, it add a new, and perhaps more important, requirement to this list in the case of heterogeneous networks: the proliferation of unpredictable wireless networks. Wireless networks must cope with dynamic link conditions not present in wired infrastructures, which place a heavy burden on quality of service management solutions. Managing QoS in the face of constantly changing operating conditions demands dynamic management approaches that span multiple layers in the protocol stack. Such as cross-layer design approaches have recently received attention in the context of cellular and mobile special networks. This article introduce the notion of network predictability and describe its relationship to achievable QoS. This relationship is used to propose a framework for cross layer design that can be used to guide development efforts and direct investment decisions for future networks.

• International Journal of Internet, Broadcasting and Communication
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• 제12권1호
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• pp.14-26
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• 2020

We categorize partnership types between network operators and a global video streaming or over-the-top service provider, Netflix from 2011 to the first quarter 2018. The options are based on the integration of over-the-top (OTT), Netflix with pay TV and telecommunication operators in the form of carrier billing, access to over-the-top (OTT) via devices or the development of their tariff plans. Options of the Type 3, 'cooperation' or the Type 4, 'agreement' entails a kind of the technical involvement between two partners and commercial agreement. The types of partnership are evolving from one to others. Some partnerships have characteristics of more than one type. The majority of technical or service integration cooperation of Type 3 entail bundling and marketing promotion of Type 2 and Type 1. Similarly, the 'agreement' of Type 4, co-branded or white-label service initiative entail tariff or device user interface (UI) integration of the 'cooperation' of Type 3 and joint marketing initiatives of Type 1.

• International Journal of Computer Science & Network Security
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• 제22권10호
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• pp.303-309
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• 2022

Software Defined Networking (SDN) is a novel approach that have accelerated the development of numerous technologies such as policy-based access control, network virtualization, and others. It allows to boost network architectural flexibility and expedite the return on investment. However, this increases the system's complexity, necessitating the expenditure of dollars to assure the system's security. Network Function Virtualization (NFV) opens up new possibilities for network engineers, but it also raises security concerns. A number of Internet service providers and network equipment manufacturers are grappling with the difficulty of developing and characterizing NFVs and related technologies. Through Moodle's efforts to maintain security, this paper presents a detailed review of security-related challenges in software-defined networks and network virtualization services.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.254-266
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• 2021

The Internet of Medical Things (IoMTs) are to be considered an investment and an improvement to respond effectively and efficiently to patient needs, as it reduces healthcare costs, provides the timely attendance of medical responses, and increases the quality of medical treatment. However, IoMT devices face exposure from several security threats that defer in function and thus can pose a significant risk to how private and safe a patient's data is. This document works as a comprehensive review of modern approaches to achieving security within the Internet of Things. Most of the papers cited here are used been carefully selected based on how recently it has been published. The paper highlights some common attacks on IoMTs. Also, highlighting the process by which secure authentication mechanisms can be achieved on IoMTs, we present several means to detect different attacks in IoMTs

• 인터넷정보학회논문지
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• 제12권4호
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• pp.61-71
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• 2011

스마트 네트워크 구축사업은 정부의 미래 인터넷 발전을 국가 아젠다로 설정하여 인터넷 선진국으로 도약시키기 위해 마련된 사업이다. 미래인터넷은 스마트 네트워크 인프라를 기반으로 현재의 인터넷의 한계를 해결하여 통신 방송 컴퓨팅이 모두 융합하고, 언제 어디서나 개인의 특성 상황에 맞는 최적 서비스를 끊김없이 제공하기 위한 다양한 대안적 기술 및 서비스 등을 포괄하는 것을 의미한다. 본 논문은 정부의 스마트 네트워크 구축사업의 경제적 파급효과 분석을 목적으로 한다. 경제적 파급효과 분석을 위해 스마트 네트워크 산업 분류체계를 재분류한 후 한국은행에서 발행하는 산업연관표를 RAS 기법을 이용하여 2011년 산업연관표로 재작성 하였다. 이를 활용하여 스마트 네트워크 산업 투자에 따른 경제적 파급효과를 분석하였다. 연구결과 스마트 네트워크 구축사업의 경제적 파급효과로 나타나는 총생산유발효과는 2011~2015년까지 약 72조 8,082억 원, 부가가치 유발효과는 44조 1,929억 원, 고용유발효과는 약 41.2만 명의 고용유발이 나타나는 것으로 추정되었다. 스마트 네트워크 구축사업은 향후 국민의 생활개선 향상에 크게 기여할 것으로 기대되며, 본 연구는 사업을 추진하기 위한 기초자료로서 가치가 있을 것이다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(3)
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• pp.43-46
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• 2001

This thesis proposes the design method of intelligent robot agent system and deals with the implementation of the system which is able to produce key internet statistics. It is believed that the statistics lead to effective investment from internet industry on its development. The system consists of robot agent process module, statistics production module and management module, and has an algorithm that can produce periodically the number of domestic homepages, active domain using .kr or gTLD and intenet hosts. It provides the result of the implementation and performance of the system as well.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2000년도 추계학술대회 및 정기총회
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• pp.302-305
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• 2000

The operation of a networked computing system (NCS), such as Internet, can be viewed as a resource allocation problem, and can be analyzed using the techniques of mathematical modeling. We define a general NCS and translate that setup into a model of an economy. The preferences of users are taken as primitives, and servers in the network are viewed as productive firms with priority input queues. Each sewer charges a rental price for its services by priority class. We characterize optimal system allocation, and derive formulae for supporting rental prices and priority premia such that the aggregated individual user demands do not exceed optimal levels and waiting-time expectations are correct. Our economic approach has the added benefit of providing a sound basis for evaluating NCS investment alternatives, using a process analogous to free entry and exit in free-enterprise economies.