• Title/Summary/Keyword: 가상망(화)

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An Algorithm for Virtual Topology Design in WDM optical Networks under Physical constraints. (파장분할다중화방식 전광통신망에서 물리적 제약을 고려한 가상망 설계 알고리즘)

  • 유지연;김상완;서승우;장문종;우희곤
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.25 no.3A
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    • pp.443-450
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    • 2000
  • Although designing a virtual topology for all-optical WDM wide-area networks has been extensively studied and several algorithms have been proposed, these algorithms assumed error-free communication between two nodes. However, noises from optical amplifiers and optical cross-connects can degraded the signal, resulting in a nonzero bit-error rate. In this paper, we investigate the effect of physical limitations on the virtual topology design. We show that for side-area all-optical networks where transmission distance is fairly long, virtual topology design algorithm that can determine the locations of opto-electronic(OE) and electro-optic(EO) conversions to set up a connection request with a high BER in a multihop manner.

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Network Management for the GSMP Open Interface in the MPLS (MPLS의 GSMP 개방형 인터페이스를 위한 망 관리)

  • Cha, Yeong-Uk;Kim, Jin-Nyeon;Kim, Chun-Hui
    • The KIPS Transactions:PartC
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    • v.9C no.2
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    • pp.227-234
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    • 2002
  • MPLS which integrates routing of layer 3 and switching of layer 2, enables support for fast forwarding, traffic engineering and virtual private network services. GSMP is open interface protocol between a label switch and a controller, and it provides connection, configuration, event, performance management and synchronization. In the GSMP open interface, the functions of network management can be located either in the controller or in the label switch. To simplify the label switch and enhance the efficiency of resources, we adopt the network management model, in which the SNMP agent is located in the controller and is interworked with the GSMP. We presented the interworking scenrios between the GSMP and the network management of MPLS. We implemented the controller to verify the realization of our adopted network management model, and measured the connection setup delay of the provisioned connection.

Research on the Implementation of the Virtual Interface on Multi-mode Mobile Nodes (멀티모드 단말을 위한 가상 인터페이스 구현 연구)

  • Lee, Kyoung-Hee;Lee, Seong-Keun;Rhee, Eun-Jun;Cho, Kyoung-Seob;Lee, Hyun-Woo;Ryu, Won;Hong, Seng-Phil
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.4B
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    • pp.677-686
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    • 2010
  • In this paper, we propose the virtual interface management scheme on the multi-mode mobile node for supporting multiple connections to various access networks in fixed mobile convergence (FMC) networks. The proposed scheme supports the virtualization of multiple physical network interfaces by presenting only the virtual interface to beyond IP layers and hiding physical network interfaces from them. In the proposed scheme, only one IP address is allocated to virtual interface without any IP allocations to physical network interfaces. Therefore, the proposed scheme does not change its IP address and keep it during the vertical handover, so that it can support the seamless handover of real-time multimedia services among heterogeneous access networks. The proposed scheme is implemented on the multi-mode mobile node with multiple network interfaces by using NDIS (Network Driver Interface Specifications) libraries. Through the mobility test-bed and the test application of virtual interface, we evaluate and analyze the performance of the proposed scheme.

Comparison of online video(OTT) content production technology based on artificial intelligence customized recommendation service (인공지능 맞춤 추천서비스 기반 온라인 동영상(OTT) 콘텐츠 제작 기술 비교)

  • CHUN, Sanghun;SHIN, Seoung-Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.21 no.3
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    • pp.99-105
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    • 2021
  • In addition to the OTT video production service represented by Nexflix and YouTube, a personalized recommendation system for content with artificial intelligence has become common. YouTube's personalized recommendation service system consists of two neural networks, one neural network consisting of a recommendation candidate generation model and the other consisting of a ranking network. Netflix's video recommendation system consists of two data classification systems, divided into content-based filtering and collaborative filtering. As the online platform-led content production is activated by the Corona Pandemic, the field of virtual influencers using artificial intelligence is emerging. Virtual influencers are produced with GAN (Generative Adversarial Networks) artificial intelligence, and are unsupervised learning algorithms in which two opposing systems compete with each other. This study also researched the possibility of developing AI platform based on individual recommendation and virtual influencer (metabus) as a core content of OTT in the future.

Optimizing Performance and Energy Efficiency in Cloud Data Centers Through SLA-Aware Consolidation of Virtualized Resources (클라우드 데이터 센터에서 가상화된 자원의 SLA-Aware 조정을 통한 성능 및 에너지 효율의 최적화)

  • Elijorde, Frank I.;Lee, Jaewan
    • Journal of Internet Computing and Services
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    • v.15 no.3
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    • pp.1-10
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    • 2014
  • The cloud computing paradigm introduced pay-per-use models in which IT services can be created and scaled on-demand. However, service providers are still concerned about the constraints imposed by their physical infrastructures. In order to keep the required QoS and achieve the goal of upholding the SLA, virtualized resources must be efficiently consolidated to maximize system throughput while keeping energy consumption at a minimum. Using ANN, we propose a predictive SLA-aware approach for consolidating virtualized resources in a cloud environment. To maintain the QoS and to establish an optimal trade-off between performance and energy efficiency, the server's utilization threshold dynamically adapts to the physical machine's resource consumption. Furthermore, resource-intensive VMs are prevented from getting underprovisioned by assigning them to hosts that are both capable and reputable. To verify the performance of our proposed approach, we compare it with non-optimized conventional approaches as well as with other previously proposed techniques in a heterogeneous cloud environment setup.

(디지털 콘텐츠 공유행위의 동기부여요인 연구 )

  • Jung, Jung-Ho
    • 한국HCI학회:학술대회논문집
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    • 2006.02b
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    • pp.753-760
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    • 2006
  • 초고속 인터넷망의 보급으로 멀티미디어 환경에서의 디지털 콘텐츠 생산 및 유통은 시간적, 공간적 제약을 뛰어 넘어 다방면으로 활성화되고 있다. 네트워크 구조에서의 파일전송기술에 의해 디지털 콘텐츠는 인터넷 공간에서 역학적인 사회적 관계을 맺은 사용자에 의해 공유되고 있으며, 공급과 수요의 증가로 불법 콘텐츠 시장이 육성되어 저작권에 대한 법적인 이슈가 날로 첨예화 되고 있다. 본 연구는 네트워크 환경에서 사회적 연결망을 기반으로 한 사용자의 콘텐츠 공유 행위에 대한 심리적 요인를 분석함으로써, 사용자간의 관계 조명 및 상호작용과 콘텐츠 공유의 동기부여요인 대해 논의해 보고자 한다. 이를 위한 첫번째로 현재 인터넷 시장의 디지털 콘텐츠 공유현황 분석이 선행되었고, 두번째로 가상공간에서의 커뮤니케이션은 사회적 관계형성이란 관점에서 사용자간의 공유 행위를 정리하였으며, 마지막으로 공유 행위자의 심리적 욕구를 아브라함 매슬로우(Abraham H. Maslow) 욕구단계설을 근간으로 하여 재조명하였다. 이는 네트워크 구조에서의 콘텐츠 생산에 활성화를 위하여 다각적인 측면으로 접근하였으며, 향후 정법화된 디지털 콘텐츠 시장 조성을 위한 가이드로 제시하고자 한다.

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A Study on the Exploration Device of the Disaster Site Using Drones (드론을 이용한 재난 현장 탐사 장치에 대한 연구)

  • Nam, Kang-Hyun;Jang, Min-Seok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.14 no.3
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    • pp.579-586
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    • 2019
  • The purpose of this study is to determine the rapid saving of life through the drones when natural disasters such as earthquake and fire occur. Drones are equipped with riders, temperature, hazardous gas sensors and wireless cameras are registered with the application server for monitoring the disaster site and real-time monitoring functions are performed to identify the situation on site before rescuing personnel are active. When monitoring finds a person to save, the application server provides real-time image information for effective life-saving.

A Study on the PRC Generation Algorithms for Virtual Reference Stations Using a Network of DGNSS Reference Stations (DGNSS 기준국 네트워크를 활용한 가상기준국 보정정보 생성 알고리즘에 관한 연구)

  • Kim, Hye-In;Park, Kwan-Dong
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.29 no.3
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    • pp.221-228
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    • 2011
  • For service-area-widening and commercialization of DGNSS service, Ministry of Land, Transport and Maritime Affairs is developing a DGNSS service based on VRS using T-DMB. In this study, three PRC generation algorithms are developed for VRS DGNSS and their accuracies were evaluated. Three DGNSS correction generation algorithms are based on inverse distance weighting, 1st- and 2nd- multiple linear regression, and their positioning accuracies were compared in terms of the number of reference stations used for network composition and the algorithm type. As a result, the positioning accuracy of the case of using 16 sites is better than that of 6 sites. And the algorithm using the multiple linear regression showed the best performance. When the positioning accuracy of VRS DGNSS was compared with the traditional single-reference DGNSS, the improvement ratio was 20-23% and 20-36% for the horizontal and vertical directions, respectively.

(A Study on Control Mechanism for Differentiated Optical QoS in Next Generation OVPN) (차세대 OVPN에서 차등화된 광 QoS 서비스를 위한 제어 메커니즘 연구)

  • Jeong Chang-Hyun;Lee Suk-Jin;Cho Kwang-Hyun;Yoon Mi-Ra;Kim Sung-Un
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.42 no.9 s.339
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    • pp.71-84
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    • 2005
  • A 'VPN over Intemet' has the benefit of being cost-effective and flexible. However, it has difficulties providing sufficient QoS and adequate transmission capacity for high bandwidth service. Given the increasing demand for high bandwidth Internet and QoS assurances in a 'VPN over Internet', IP/GMPLS based on a control plane combined with a high bandwidth, DWDM optical network is seen as a very favorable anroach for realizing the future 'OVPN over IP/GMPLS over DWDM'. Within this architecture, providing QoS guaranteed multimedia services with a differentiated QoS guaranteed protocol framework with QoS recovery is one of the key issues to implement. Therefore, in this paper, we suggest the entire interoperability procedure of control protocols based on differentiated optical QoS service (DOQOS) classes for providing end-to-end QoS in an 'OVPN over IP/GMPLS over DWDM' architecture.

A Study on MEC Network Application Functions for Autonomous Driving (자율주행을 위한 MEC 적용 기능의 연구)

  • Kang-Hyun Nam
    • The Journal of the Korea institute of electronic communication sciences
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    • v.18 no.3
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    • pp.427-432
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    • 2023
  • In this study, MEC (: Multi-access Edge Computing) proposes a cloud service network configuration for various tests of autonomous vehicles to which V2X (: Vehicle to Everything) is applied in Wave, LTE, and 5G networks and MEC App (: Application) applied V2X service function test verification of two domains (operator (KT, SKT, LG U+), network type (Wave, LTE (including 3G), 5G)) in a specific region. In 4G networks of domestic operators (SKT, KT, LG U+ and Wave), MEC summarized the improvement effects through V2X function blocks and traffic offloading for the purpose of bringing independent network functions. And with a high level of QoS value in the V2X VNF of the 5G network, the traffic steering function scenario was demonstrated on the destination-specific traffic path.