• Title/Summary/Keyword: 통신장애

Search Result 901, Processing Time 0.027 seconds

A Restoration Schemes using Source Routing based on Topology DB on ATM Network (ATM망에서 토폴로지 DB기반 소스라우팅을 이용한 장애복구 방안)

  • 김형철;곽윤식;이대영
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.24 no.8B
    • /
    • pp.1421-1425
    • /
    • 1999
  • A restoration scheme is presented when a failure occurs at nodes or links on the ATM network. Each node on the network contains the same topology information for resources on the network by Exchanging NSE(Network State Element) which has the network state information through RCC(Routing Control Channel). We also propose a new establishing algorithm that set up a new alternate path reflecting the state of the network changed dynamically at the source node. In the result of applying our scheme, the rates of restoration can be improved and the number of messages decreased so that fast recovering could be possible by reducing traffics on the network by lowering the rates of the call-setup failure at the stage of CAC(Connection Admission Control).

  • PDF

The Model Proposal of Mobile Cloud Security Technology (모바일 클라우드 보안기술의 모델 제안)

  • Shin, Seung-Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.11 no.6
    • /
    • pp.151-156
    • /
    • 2011
  • The Korean domestic cloud market will reach a value of 2 trillion Korean won by 2014. The domestic market is expected to grow rapidly in size despite the fact that there exist activation barriers in mobile cloud services, concerns about the reliability of service, and concerns about security and confidentiality of data. Under these circumstances, existing IT security technologies may be be utilized to provide sufficient response characteristics. Despite this, they must be optimized for mobile cloud computing and enhanced to mitigate inherent security flaws. In this study, mobile cloud security is covered along with use cases that cover the cases where mobile devices are particularly vulnerable and suggest ways to mitigate security vulnerabilities.

Verb Prediction for Korean Language Disorders in Augmentative Communicator using the Neural Network (신경망을 이용한 언어장애인용 문장발생장치의 동사예측)

  • Lee Eunsil;Min Hongki;Hong Seunghong
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.1 no.1
    • /
    • pp.32-41
    • /
    • 2000
  • In this paper, we proposed a method which predict the verb by using the neural network in order to enhance communication rate in augmentative communication system for Korean language disorders. Each word is represented by an information vector according to syntax and semantics, and is positioned at the state space by being partitioned into various regions different from a dictionary-like lexicon. Conceptual similarity is realized through position in state space. When a symbol was pressed, we could find the word for the symbol at the position in the state space. In order to prevent verb prediction's redundancy according to input units, we predicted the verb after separating class using the neural network. In the result we can enhance $20\% communication rate in the restricted space

  • PDF

A QoS-based Hierarchical Routing Algotihm for TINA-based Connection Management (TINA 체계의 연결관리를 위한 QoS 기반의 계층적 경로 설정 기법)

  • 서승호
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.25 no.10B
    • /
    • pp.1690-1700
    • /
    • 2000
  • Connection management function of the TINA which is developed by TINA-C provides network connection services such as setup modification and release of connections. The connection management function provides these services to network operators to the fault management function that provides backup-path and to the performance management function that provides load-balancing. The connection management function necessarily requires a routing algorithm to set up a new connection. In this paper we propose a new routing algorithm named QTHR (QoS and Traffic parameter based Hierarchical Routing) for TINA based connection management of ATM/B-ISDN network. And we implemented the QTHR and analyzed the performance of the QTHR.

  • PDF

Implement Concentration Neuro-Feedback Game using Gun-Shooting Game (건-슈팅 게임을 응용한 집중력 뉴로피드백 게임 구현)

  • Kim, Hyung-Min;Lee, Daniel-Juhun;Park, So-Youn;Kim, Seong-Kweon
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.15 no.2
    • /
    • pp.285-290
    • /
    • 2020
  • Neuro-feedback is a technology that can identify your brain state and you can intentionally change your brain state. People with attention deficit and hyperactivity disorder need this technology but existing neuro-feedback training has a problem, which is not interesting and maintains a static state for a long time. In this paper, we proposed and implemented a neuro-feedback game that combines neuro-feedback and gun-shooting games to enhance concentration training. The neuro-feedback game has been implemented with the design of EEG measurement system, game controller and gamesoft. We hope that this study will be useful for people suffering from attention deficit and hyperactivity disorder.

A study on ultrasound analysis of the transformer strange signal (변압기 이상음의 초음파 분석에 관한 연구)

  • 백화종;지석근
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2002.11a
    • /
    • pp.835-838
    • /
    • 2002
  • A running high voltage equipments produce ultrasonic wave that has unique sound by the specific characteristics of the electricity. The generation of the ultrasonic wave is made by the electric transform like arcing, corona, and tracking so on. The mechanical losses and fatal human damages are happened by the electric failure of high voltage equipments. To prevent and diagnose the obstacle factors of the high voltage equipments, the measurement of the ultrasonic wave became to be prominent. However standardized data have been a deficient situation by now. This paper measures the ultrasonic wave coming from the real running transformer equipments and transforms it as an audio frequency. Measured data represents as frequency and time domain through the FFT(Fast Fourier Transform) transform. In conclusion, the purpose of this paper is to standardize the analyzed data.

  • PDF

An Efficient Collapsing Algorithm for Current-based Testing Models in CMOS VLSI (CMOS VLSI를 위한 전류 테스팅 기반 고장모델의 효율적인 중첩 알고리즘)

  • Kim Dae lk;Bae Sung Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.29 no.10A
    • /
    • pp.1205-1214
    • /
    • 2004
  • For tile physical defects occurring in CMOS circuits which are not handled well by voltage-based testing, current testing is remarkable testing technique. Fault models based on defects must accurately describe the behaviour of the circuit containing the defect. In this paper, An efficient collapsing algorithm for fault models often used in current testing is proposed. Experimental results for ISCAS benchmark circuits show the effectiveness of the proposed method in reducing the number of faults that have to be considered by fault collapsing and its usefulness in various current based testing models.

An Ant-based Routing Method using Enhanced Path Maintenance for MANETs (MANET에서 향상된 경로 관리를 사용한 개미 기반 라우팅 방안)

  • Woo, Mi-Ae
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.35 no.9B
    • /
    • pp.1281-1286
    • /
    • 2010
  • Ant-based routing methods belong to a class of ant colony optimization algorithms which apply the behavior of ants in nature to routing mechanism. Since the topology of mobile ad-hoc network(MANET) changes dynamically, it is needed to establish paths based on the local information. Subsequently, it is known that routing in MANET is one of applications of ant colony optimization. In this paper, we propose a routing method, namely EPMAR, which enhances SIR in terms of route selection method and the process upon link failure. The performance of the proposed method is compared with those of AntHocNet and SIR. Based on he analysis, it is proved that the proposed method provided higher packet delivery ratio and less critical link failure than AntHocNet and SIR.

A Failover Method in CCTV Network Video Recording Environment (CCTV 네트워크 영상 녹화 환경에서 장애 조치 기법)

  • Yang, Sun-Jin;Park, Jae-Pyo;Yang, Seung-Min
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.19 no.4
    • /
    • pp.1-6
    • /
    • 2019
  • CCTV video recording system is recognized as evidence value of video data, and is widely used in real life for the purpose of security of facilities or security control, and it is developing in order to process high-resolution and high-capacity data in real time through network. However, there is no description of redundancy to prevent the loss of image data due to defects of unexpected equipment or external attack, and even if the redundancy is implemented, a high-capacity video stream is transmitted through the network, network overload can not avoided. In this paper, we propose and verify a failover method based on rules that can operate the redundancy scheme without inducing network overload in CCTV network video recording environment.

A System Architecture for Facility Fault Diagnosis and Repair Action in Smart Factory (스마트 팩토리에서 설비 장애 진단 및 조치 시스템 구조)

  • Cho, Jaehyung;Lee, Jaeoh
    • KNOM Review
    • /
    • v.23 no.1
    • /
    • pp.18-25
    • /
    • 2020
  • Recently, a research on a smart factory was developed from a concept of factory automation(FA) to the formation of collecting and analyzing data. This trend is accelerated as the development of communication technology(5G) and IoT devices are developed in various ways according to the field situation. In addition, digital transformation has been actively conducted in the strengthening corporate competitiveness, and various optimization studies are being conducted through process re-adjustment by combining data received from various IoT equipment and automated facilities. Therefore, in this paper, we propose a system architecture and its related components in diagnosing and repairing facility failure using a prediction system which is one of the related researches.