• 디지털융복합연구
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• 제16권9호
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• pp.179-185
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• 2018

4차 산업 혁명의 정보통신기술 산업 분야의 새로운 성장 동력으로 주목받는 사물인터넷 기술은 단순한 보안 기술을 넘어 신뢰성이 필요하다. 이러한 신뢰성은 IoT 제품의 기획 및 설계 단계부터 고려되어 제품을 개발하고 평가하며 사용하는 모두가 보안성을 측정하고 신뢰할 수 있는 시스템이 구축되어야 한다. 사용되는 IoT 기기 수의 급격한 증가와 사용 생명주기의 증가는 소프트웨어 패치와 업데이트 및 관리의 어려움으로 인한 보안 취약성 증가로 이어진다. 본 논문에서는 IoT 산업 분야의 기술적 정책적 동향을 분석하고 이를 통해 IoT 기기의 보안성과 확장성의 한계점을 분석한다. 이러한 한계점을 보완하기 위해 블록체인의 요소 기술인 해시를 활용해 소프트웨어의 무결성을 자동 검증하는 방법을 제안한다. 해시를 활용한 소프트웨어 무결성 자동 검증 방법으로 사물인터넷의 보안성과 확장성을 강화하고, 제안하는 보안 기술 적용을 위한 정책적 솔루션을 제시한다.

• 전자통신동향분석
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• 제30권2호
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• pp.49-58
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• 2015

최근 농업분야에 있어 ICT(Information and Communications Technology)기술을 접목하여 농/축산물 및 식품의 생산, 유통, 판매, 소비 전주기 프로세스에 대한 생산성, 안전성, 경제성 및 품질 향상과 각 단계의 활동 주체(생산, 유통, 소비)들 간에 상생의 생태계 구축을 위한 스마트농업 기술이 대두되고 있다. 이 스마트농업 기술은 농업 가치사슬 전반에 걸쳐 IT(Information Technology)와의 접목을 통해 1차 산업인 농업을 6차 산업으로 발전시킴으로써, 고기능, 고효율화는 물론, 부가가치 제고, 생산비 절감, 환경오염 최소화, 농촌생활의 편리성 증대로 지속 가능한 농업을 구현할 수 있을 것으로 기대되는 기술이다. 본고에서는 스마트농업 기술에 관한 배경, 정책 및 시장동향, 기술 및 표준화동향을 제시하고 향후 지속적인 발전을 위한 스마트농업에 관한 표준화 정책을 제언한다.

• Journal of Information Technology Applications and Management
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• 제22권3호
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• pp.115-128
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• 2015

Although the telecommunications service industry has become a basic infrastructure component of the information and communication technology (ICT) industry, it is now losing its reputation as a cash cow due to achieving a saturation of service subscribers, especially in South Korea. With the exception of improving network speeds, network operators are experiencing difficulties in creating new innovations. Therefore, new innovations for the telecommunications service industry should be identified in conjunction with government policies for industry promotion. To examine the innovative capabilities of a specific industry, innovation system theories were used as a framework for research. However, existing innovation systems are limited with regard to explaining the openness of relationships and user participation which are general properties of the ICT industry. Moreover, as sources of innovative activity, additional values such as financial support and collaboration are more appropriate. This study presents a new innovation system based on innovation values. We analyze the telecommunications service industry and prioritize the importance of telecommunication policies within South Korea. An in-depth interview with experts based on the innovation system framework is conducted first. Next, innovation factors derived from the interview are applied within an analytic hierarchy process (AHP), leading to a prioritization of innovation factors for the telecommunications service industry.

• Journal of information and communication convergence engineering
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• 제11권2호
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• pp.82-94
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• 2013

In this paper, we propose a novel tunnel-free scheme in a proxy mobile IPv6 (PMIPv6)-based nested network mobility environment; several mobile nodes (MNs) and mobile routers (MRs) compose a hierarchical wireless network topology. Because tunnels created by several MRs overlap and data packets travel along several local mobility anchors (LMAs), the utilization of the wireless section is reduced and the packet forwarding path of the wire-line section is not optimal. In our tunnel-free scheme, the mobile access gateway (MAG) plays an important role in both the wireless and wire-line sections. Using a local binding update, this tunnel-free scheme forwards data packets with a host-based routing table without any tunnel. Establishing a direct tunnel between the MAG and the last LMA, this scheme removes nested tunnels between intermediate LMAs and MRs, and optimizes the forwarding path to the MN in the wire-line section.

• International journal of advanced smart convergence
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• 제8권4호
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• pp.40-46
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• 2019

The current education is becoming more extensive with the application of various teaching methods. This is a problem that is so distributed that it is difficult for users to find the data and it takes a long time to find the information they need. Currently, various educational services, materials, and instruments are developed and scattered. Therefore, it is important to raise students' awareness of aptitude and career path with customized education tailored to students. Conventional education platforms have very difficult to choose the right materials for students because of the spread of educational programs and institution materials. To solve this, we propose a customized recommendation approach to recommend customized educational service materials and institution for students to teachers, which helps teachers conveniently choose materials suitable for their respective environments. On this new platform, the CNN algorithm provides recommended content for classes and students. For real service on the educational service platform, we implement this system for Jeil edus business. Through this mechanism, we expect to improve the quality of education by helping to select the right service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권3호
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• pp.1063-1082
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• 2018

The concept of SDN (Software Defined Networking) endows the network with programmability and significantly improves the flexibility and extensibility of networks. Currently a plenty of research works on introducing SDN into wireless networks. Most of them focus on the innovation of the SDN based architectures but few consider how to realize the global perception of the network through the controller. In order to address this problem, a software defined carrier grade Wi-Fi framework called SWAN, is proposed firstly. Then based on the proposed SWAN architecture, a blueprint of introducing the traditional NSA (Network Situation Awareness) into SWAN is proposed and described in detail. Through perceiving various network data by a decentralized architecture and making comprehension and prediction on the perceived data, the proposed blueprint endows the controllers with the capability to aware of the current network situation and predict the near future situation. Meanwhile, the extensibility of the proposed blueprint makes it a universal solution for software defined wireless networks SDWNs rather than just for one case. Then we further research one typical use case of proposed NSA blueprint: network performance awareness (NPA). The subsequent comparison with other methods and result analysis not only well prove the effectiveness of proposed NPA but further provide a strong proof of the feasibility of proposed NSA blueprint.

• Journal of Communications and Networks
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• 제17권3호
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• pp.213-220
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• 2015

In this paper, we present a reliability-based iterative proportionality-logic decoding algorithm for two classes of structured low-density parity-check (LDPC) codes. The main contributions of this paper include: 1) Syndrome messages instead of extrinsic messages are processed and exchanged between variable nodes and check nodes, which can reduce the decoding complexity; 2) a more flexible decision mechanism is developed in which the decision threshold can be self-adjusted during the iterative process. Such decision mechanism is particularly effective for decoding the majority-logic decodable codes; 3) only part of the variable nodes satisfying the pre-designed criterion are involved for the presented algorithm, which is in the proportionality-logic sense and can further reduce the computational complexity. Simulation results show that, when combined with factor correction techniques and appropriate proportionality parameter, the presented algorithm performs well and can achieve fast decoding convergence rate while maintaining relative low decoding complexity, especially for small quantized levels (3-4 bits). The presented algorithm provides a candidate for those application scenarios where the memory load and the energy consumption are extremely constrained.

• 디지털융복합연구
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• 제10권10호
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• pp.61-73
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• 2012

본 연구는 정보통신기술이 전시컨벤션 효과만족에 미치는 영향을 분석하기 위하여 정보통신기술업체 312 업체를 대상으로 정보통신기술이 전시컨벤션 효과만족에 미치는 영향에 대하여 분석을 함으로써 정보통신기술인 컨벤션 e-Portal시스템, 전시컨벤션 상품, 컨벤션산업 경쟁력, 컨벤션 인프라 구축, 컨벤션 연계관광 프로그램 구성요소를 컨벤션 효과만족에 대하여 어떤 영향을 미치는 가에 대하여 실증적으로 분석하여 전시컨벤션산업에 정보통신기술이 컨벤션효과 만족에 미치는 영향을 분석하였다. 그 결과 정보통신기술인 상품기술, 관광프로그램기술 인프라구축기술, e-portal시스템, 산업경쟁력기술은 전시컨벤션 효과에 영향을 미치는 것을 알 수 있었다. 그러므로 이러한 요인들은 전시컨벤션효과인 기본자료확보와 환경적요인파악, 상품개발토대마련. 상품유형확정, 경제적파급효과와 만족도에 영향을 미치는 것을 알 수 있다. 따라서 전시컨벤션은 정보통신기술을 높이고 운영비를 절감하는 효과를 거둘 수 있다.

• Journal of information and communication convergence engineering
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• 제19권1호
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• pp.48-53
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• 2021

Herein, we propose a document analysis system that analyzes papers or reports transformed into XML(Extensible Markup Language) format. It reads the document specified by the user, extracts keywords from the document, and compares the frequency of keywords to extract the top-three keywords. It maintains the order of the paragraphs containing the keywords and removes duplicated paragraphs. The frequency of the top-three keywords in the extracted paragraphs is re-verified, and the paragraphs are partitioned into 10 sections. Subsequently, the importance of the relevant areas is calculated and compared. By notifying the user of areas with the highest frequency and areas with higher importance than the average frequency, the user can read only the main content without reading all the contents. In addition, the number of paragraphs extracted through the deep learning model and the number of paragraphs in a section of high importance are predicted.

• ETRI Journal
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• 제37권1호
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• pp.175-185
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• 2015

This paper presents a system-of-systems (SoS) approach to the formal modeling of a cyber-physical system (CPS) for simulation-based analysis. The approach is based on a convergence technology for modeling and simulation of a highly complex system in which SoS modeling methodology, hybrid systems modeling theory, and simulation interoperation technology are merged. The methodology maps each constituent system of a CPS to a disparate model of either continuous or discrete types. The theory employs two formalisms for modeling of the two model types with formal specification of interfaces between them. Finally, the technology adapts a simulation bus called DEVS BUS whose protocol synchronizes time and exchange messages between subsystems simulation. Benefits of the approach include reusability of simulation models and environments, and simulation-based analysis of subsystems of a CPS in an inter-relational manner.