• Title, Summary, Keyword: High-speed Network

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Development of MAC layer of Network for KTX high-speed train system (고속 열차용 네트워크의 MAC 계층 개발)

  • Lee, Bum-Yong;Kim, Hyung-In;Jung, Sung-Youn;Park, Jae-Hyun
    • Proceedings of the KSR Conference
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    • pp.2015-2020
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    • 2008
  • Real-time communication network is important for KTX high speed train system because small problem can make a huge accident. Communication network for KTX high speed train system consists of IEEE 802.4 token bus network and FM0 encoding. The network device is developed by using MC68824 TBC, MC68185 TPM and MC68020 MPU. The network device make available to analysis of the network protocol among vehicles for Kyung-Boo high-speed train system.

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Congestion Control using Smith Principle and PID Control Algorithm in High-speed AIM Network

  • Kim, Kyung-Woo;Chun, Kyungh-Han;Jeon, Hae-Jin;Choi, Bong-Yeo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.180.3-180
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    • 2001
  • In recent years, the remarkable development of communication network technology with the increasing demand of B-ISDN service helps the higg-speed ATM network to be applied a fully integrated global network. The considerable issue of high-speed communication network is a performance of service-link and stability of network queue. In this paper, we propose a feedback control algorithm and PID control method to improve the performance of service-link and stability of network queue and confirm upgraded traffic performance of the high-speed ATM network.

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High Speed Serial Network Environment on DCP (DCP 환경에서의 고속 Serial 네트웍 환경구현)

  • Park Chang-Won;Chung Ha-Joong;Jeon Ki-Man
    • 한국정보통신설비학회:학술대회논문집
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    • pp.87-90
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    • 2006
  • Nowadays, we can enjoy access to high speed network and advanced services of convergence between broadcasting and communication anywhere and anytime through a ubiquitous computing. So, now digital convergence devices come out constantly. These devices are required faster network environment for high speed data processing than before. In this paper, we describe the design of InfiniBnad network adapter, which is included two FPGA chipsets. When this adapter is installed to Digital Convergence Platform (DCP) network performance will be improved. The adapter includes 12channel serial ports for external communication and internally, uses PCI-Express bus. We have finished the test of high speed serial based network adapter through composing complete InfiniBand network and applied fabric management software. So, we have verified that it can be applied on DCP environment.

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The development of WTB(Wire Train Bus) Analyzer for the TCN(Train Communication Network) testing (TCN(Train Communication Network) 통신 시험용 WTB(Wire Train Bus) Analyzer 개발)

  • Jeon, Seong-Joon;Paik, Jin-Sung;Shon, Kang-Ho
    • Proceedings of the KSR Conference
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    • pp.1936-1945
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    • 2008
  • In Korea, TCN has applied to the Korean High-speed Train (HSR350X) through G7 High-speed Train development project. TCN is the most suitable international standard communication network for distributed control systems that is adopted for high-speed of vehicle, safety and flexibility. TCN is the network exclusively for the high-speed train and electrical trains. This TCN satisfies the network standards. The network standards are real time communication, fault tolerance design, integrated data system, resistance of environment, automated recognition for modification of vehicle formation and maintenance. The purpose of this research is applying the development of WTB analyzer which is part of communication network system TCN, to check the communication of high-speed trains and electrical trains.

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Design of Neural Network Controllers for High Speed Induction Motor Drives (초고속 유도전동기 구동을 위한 신경회로망 제어기 설계)

  • 김윤호;이병순;성세진
    • The Transactions of the Korean Institute of Power Electronics
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    • v.2 no.1
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    • pp.39-45
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    • 1997
  • In this paper, a high speed motor drive system using an indirect adaptive neural network controller is proposed. In the variable high speed motor drives, the speed response can be deteriorated by long settling time and high overshoot. To obtain a good dynamical performance, an adaptive feedforward controller consisted of Neural Network Controller(NNC) and Neural Network Emulator(NNE) is applied. The NNE is used to identify the parameters and characteristics of high speed motor. To train the controller, the weights are dynamically adjusted using the back propagation algorithm. Computer simulation and implementation of the proposed system is described.

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A Study on Transport Protocol for High Speed Networking

  • Kwon, Yoon-Joo;Seok, Woo-Jin;Byeon, Ok-Hwan
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • pp.211-214
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    • 2005
  • There are emerging many eScience applications. More and more scientists want to collaborate on their investigation with international partners without space limitation by using these applications. Since these applications have to analyze the massive raw data, scientists need to send and receive the data in short time. So today's network related requirement is high speed networking. The key point of network performance is transport protocol. We can use TCP and UDP as transport protocol but we use TCP due to the data reliability. However, TCP was designed under low bandwidth network, therefore, general TCP, for example Reno, cannot utilize the whole bandwidth of high capacity network. There are several TCP variants to solve TCP problems related to high speed networking. They can be classified into two groups: loss based TCP and delay based TCP. In this paper, I will compare two approaches of TCP variants and propose a hybrid approach for high speed networking.

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The Design of a Link Aggregation Equipment Based on Packet Processing with Network Security Capability (네트워크 보안 기능을 갖는 패킷처리 기반의 링크 통합 장비 설계)

  • Shin, Jae-Heung;Kim, Hong-Ryul;Lee, Sang-Ha;Hur, Yong-Min;Lee, Sang-Cheol
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.60 no.3
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    • pp.150-154
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    • 2011
  • The technology to build high speed network using low cost DSL in the areas where the cost to build high speed network is high and the network environment is not very accommodating is important in providing the high speed network that meets the user demand and utilizing the network resources in an efficient way. This study presents development of the link aggregation equipment that performs the access control and firewall functions for packet processing based LAN users. The equipments developed support up to 5 line link aggregation as opposed to current 2 line link aggregation. The equipments also allow the use of high speed network in the areas where the network environment is not very accommodating. Also, the fail-over function is added to each line to provide reliability and the self-security function is enhanced to protect the network from unauthorized use and prevents waste of network resources by authorized users.

Configuration design of the trainset of a high-speed train using neural networks

  • Lee, Jangyong;Soonhung Han
    • Proceedings of the Korea Inteligent Information System Society Conference
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    • pp.116-121
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    • 2001
  • Prediction of the top(service) speeds of high-speed trains and configuration design to trainset of them has been studied using the neural network system The traction system. The traction system of high-speed trains is composed of transformers, motor blocks, and traction motors of which locations and number in the trainset formation should be determine in the early stage of train conceptural design. Components of the traction system are the heaviest parts in a train so that it gives strong influence to the top speeds of high-speed trains. Prediction of the top speeds has been performed mainly with data associated with the traction system based on the frequently used neural network system-backpropagation. The neural network has been trained with the data of the high-speed trains such as TGV, ICE, and Shinkanse. Configuration design of the trainset determines the number of trains motor cars, traction motors, weights and power of trains. Configuration results from the neural network are more accurate if neural networks is trained with data of the same type of trains will be designed.

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A Study on Factors Influencing Internet Service Satisfaction in the High-Speed Information and Communication Network (초고속정보통신망하에서 인터넷서비스만족도에 영향을 주는 요인에 관한 연구)

  • 조성빈;유한주;유왕진
    • Journal of the Korean Society for Quality Management
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    • v.30 no.3
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    • pp.168-185
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    • 2002
  • A few recent international surveys reported that Korea ranks the top with respect to the high-speed information and communication network subscription per 100 people in the world. Such infrastructure has been bringing about broad changes in Internet service for both business and individual users. By conducting a questionnaire survey on a moderate size of sample proportional to the population of each region across country, we try to analyze what factors might explain the level of Internet service satisfaction with respect to security, searching, and convenience dimensions. According to the test results, several factors such as sex, age, kind of network lines, usage frequency, e-mail usage, e-shopping, online problem experience might explain the different levels of Internet service satisfaction in the high-speed Internet network. This study might shed a guidance to scholars conducting Internet-related studies and practitioners who plan information policies and business strategies.

Sensorless Vector of High Speed Motor Drives based on Neural Network Controllers using Kalman Filter Learning Algorithm (칼만필터 학습 신경회로망을 이용한 고속 유도전동기의 센서리스 제어)

  • 이병순;김윤호
    • Proceedings of the KIPE Conference
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    • pp.518-521
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    • 1999
  • This paper describes high speed squirrel cage induction motor drives without speed sensors using neural network based on Kalman filter Learning. High speed motors are receiving inverasing attentions in various applications, because of advantages of high speed, small size and light weight with same power level. Larning rate by Kalman filtering is time varying, convergence time fast, effect of initial weight between neurons is small.

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