• Convergence Security Journal
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• v.16 no.2
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• pp.19-23
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• 2016

The design, management, and operation of network infrastructure have evolved during the last few years, leveraging on innovative technologies and architectures. With such a huge trend, due to the flexibility and significant economic potential of these technologies, software defined networking (SDN) and network functions virtualization (NFV) are emerging as the most critical key enablers. SDN/NFV enhancing the infrastructure agility, thus network operators and service providers are able to program their own network functions (e.g., gateways, routers, load balancers) on vendor independent hardware substrate. They facilitating the design, delivery and operation of network services in a dynamic and scalable manner. In NFV, the management and orchestration (MANO) orchestrates other specific managers such as the virtual infrastructure manager (VIM) and the VNF Manager (VNFM). In this paper, we examine the contents of these NFV MANO systematically and proposes a security system in a virtualized environment.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.4
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• pp.687-694
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• 2020

SDN and NFV are next-generation network technologies, and cloud, such as data centers, campuses, and large companies, has been established, or is actively applied by service-oriented communication companies. In particular, the Defense Integrated Data Center will be a prime example for military applications. In order for the Defense Integrated Data Center (DIDC) to become an intelligent center, it is accelerating the promotion of the "Smart Defense Integrated Data Center", which applied the latest information and communication technology (ICT). At the time of the establishment of DIDC, it plans to start building infrastructure such as cloud services at around 30% level, and expand D-Cloud to 75% through 'Cloud First'. In addition, the introduction of SDN/NFV will reduce the operation cost and manpower of DIDC, strengthen the ability to efficiently use information resources and cyber information protection systems, and increase flexibility and agility in using each system to improve efficiency in defense management in the future. Therefore, we will discuss the justification and expected effects of SDN/NFV introduction, focusing on DIDC.

• Information and Communications Magazine
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• v.32 no.7
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• pp.82-92
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• 2015

소프트웨어 정의 네트워킹 (Software-Defined Networking: SDN)과 네트워크 기능 가상화 (Network Function Virtualization: NFV) 기술은 네트워크 산업 전반에 걸쳐 가장 중요한 기술/트렌드로 인식되고 있다. 현재 국내외 주요 기업들이 앞다투어 기술 개발을 추진하고 있으며 이를 실제 상용망에 적용하고자 하는 움직임도 활발히 진행되고 있다. 본 고에서는 유사하면서도 다른 SDN과 NFV의 개념을 명확히 살펴보고자 한다. SDN과 NFV의 역사, 핵심 기술, 활용 분야, 그리고 향후 연구 이슈를 폭넓게 제시한다.

• KNOM Review
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• v.23 no.2
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• pp.1-10
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• 2020

Network Function Virtualization (NFV) is a key technology of 5G networks that has the advantage of enabling building and operating networks flexibly. However, NFV can complicate network management because it creates numerous virtual resources that should be managed. In NFV environments, service function chaining (SFC) composed of virtual network functions (VNFs) is widely used to apply a series of network functions to traffic. Therefore, it is required to dynamically allocate the right amount of computing resources or instances to SFC for meeting service requirements. In this paper, we propose Deep Q-Networks (DQN)-based auto-scaling to operate the appropriate number of VNF instances in SFC. The proposed approach not only resizes the number of VNF instances in SFC composed of multi-tier architecture but also selects a tier to be scaled in response to dynamic traffic forwarding through SFC.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.203-204
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• 2018

소프트웨어 정의 네트워킹 (SDN)과 네트워크 기능 가상화는 최근들어 급부상 하고 있는 기술이며, Big Data 시대에 큰 잠재력을 가지고 있다. 네트워크 기능 가상화 (NFV)는 방화벽이나 스위치, 라우터와 같은 네트워크 장비를 가상화하는 개념이다. 가상화란 실제로 존재하지 않는 것을 실제로 존재하는 것처럼 하는 것을 의미한다. 가상화 기술을 사용하여 네트워크 노드 기능의 전체 클래스를 통신 서비스를 생성하기 위해 연결하는 네트워크 아키텍쳐 개념이다. 본 논문에서는 IoT 아키텍쳐 설계를 위해 NFV를 이용해 설계하며 SDN 기반 IoT 프레임 워크를 제안한다.

• Electronics and Telecommunications Trends
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• v.31 no.1
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• pp.86-98
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• 2016

초연결 사회는 Information & Communication Technology(ICT)를 바탕으로 하는 만물인터넷 또는 사물인터넷으로 사람, 프로세스, 데이터, 사물이 서로 연결되어 지능화된 통신인프라를 통해 새로운 가치와 혁신의 창출이 가능해지는 사회로 변화하게 된다. 이러한 초연결 사회의 유무선 통신서비스를 단일 통신인프라에서 제공할 수 있는 기술이 필요하다. 이를 구현하기 위해서는 분산된 네트워크 장비들을 소프트웨어적으로 용이하게 통합운영 관리할 수 있는 Software Defined Networking(SDN) 기술과 컴퓨팅, 서버 스토리지 및 네트워크 자원을 가상화하고, 오픈 인터페이스를 통하여 소프트웨어적으로 네트워크 기능제어가 가능한 Network Functions Virtualization(NFV) 기술에 의한 지능형 융합 통신인프라가 매우 중요하다. 본고에서는 초연결 통신인프라를 위한 클라우드 컴퓨팅 가상화 기술, NFV 기술동향 및 NFV Use Cases에 대한 내용을 통하여 향후 초연결 서비스 제공을 위한 통신인프라 구축 방향을 제시하고자 한다.

• KNOM Review
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• v.22 no.3
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• pp.1-12
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• 2019

Recently, researching using big data and AI has emerged as a major issue in the ICT field. But, the size of big data for research is growing exponentially. In addition, users of data transmission of existing network method suggest that the problem the time taken to send and receive big data is slower than the time to copy and send the hard disk. Accordingly, researchers require dynamic and flexible network technology that can transmit data at high speed and accommodate various network structures. SDN/NFV technologies can be programming a network to provide a network suitable for the needs of users. It can easily solve the network's flexibility and security problems. Also, the problem with performing AI is that centralized data processing cannot guarantee real-time, and network delay occur when traffic increases. In order to solve this problem, the edge-computing technology, should be used which has moved away from the centralized method. In this paper, we investigate the concept and research trend of SDN, NFV, and edge-computing technologies, and analyze the trends of data central network technologies used by combining these three technologies.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2000.04a
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• pp.3-6
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• 2000

• KIPS Transactions on Computer and Communication Systems
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• v.9 no.2
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• pp.31-36
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• 2020

The creation of the Defense Integrated Data Center(DIDC) has resulted in a reduction in manpower, operating costs, efficient and effective management of resources. However, it is difficult to effectively collect and manage the data of a large number of battlefields coming from equipments such as drones, robots, and IoT added to the fourth industrial revolution and the future battlefield. Therefore, we will propose the design of DIDC network system using NFV and SDN, which are emerging as the core technologies of 5G, a mobile communication technology. After analyzing the data sheet of each equipment, it is considered that by integrating the redundant functions, energy efficiency, resource utilization and effective network management will be possible.

• Convergence Security Journal
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• v.17 no.3
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• pp.3-9
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• 2017

NFV is a technology that allows network services to be controlled and managed in software by separating various net work functions (NFs) from hardware devices in dedicated network equipment and implementing them in a high-performance general-purpose server. Therefore, standardized virtualization of network functions is one of the most important factors. However, until the introduction of NFV to provide commercial services, there are many technical issues to be solved such as guaranteeing performance, stability, support for multi-vendor environment, ensuring perfect interoperability, and linking existing virtual and non-virtual resources. In this paper, we propose a method to provide an end-to-end network virtualization service based on OSM R2 in KREONET.