• Title/Summary/Keyword: SLAM II

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Calculation of Blocking Probabilities in the Two-dimensional Multi-slot Connection Traffic (2원 트래픽의 호손률 계산)

  • 김승환;성단근;박진수
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.16 no.5
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    • pp.451-457
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    • 1991
  • Four computational algorithms are discussed and compared in terms of complexity, required memory, and the number of channels which calculate the blocking probabilities in the two-dimensional multi-slot connection traffic. The overflow and underflow problems can be circumvented, and thus blocking probabilities can be calculated even up to 10000 channels, by the proposed last algorithm. This algorithm is utilized in calculating the blocking probabilities for I-slot and 6-slots calls. And the results of the simulation by the SLAM-II are compared with those of the analytic calculation.

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A Study on the Performance Analysis of Inter-Processor Communication Network for Digital Switching System (대용량 전자교환기 내부통신망 성능 분석에 관한 연구)

  • 최진규;이충근;이태원
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.19 no.7
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    • pp.1335-1345
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    • 1994
  • In this paper, the performance analysis of Inter-Processor Communication Network(IPCN) in a large-capacity digital switching system, TDX-10, is presented. The simulation model of IPCN is developed using discrete event model of SLAM II. The simulation results of maximum buffer length and mean waiting times at each node, and utilization of D-bus are derived. Finally, the maximum call handling capacity of IPCN is obtained by taking link speed into consideration.

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Performance Analysis of Futurebus+ based Multiprocessor Systems with MESI Cache Coherence Protocol (MESI 캐쉬 코히어런스 프로토콜을 사용하는 Futurebus+ 기반 멀티프로세서 시스템의 성능 평가)

  • 고석범;강인곤;박성우;김영천
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.18 no.12
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    • pp.1815-1827
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    • 1993
  • In this paper, we evaluate the performance of a Futurebus based multiprocessor system with MESI cache coherence protocol for four bus transaction types. Graphical symbols and compiler of SLAM II are used in modeling and simulation. A steady-state probability of each state for MESI protocol is computed by a Markov chain. The probability of each state is used as an input value for a correct simulation. Processor utilization, memory utilization, bus utilization, and the waiting time for bus arbitration are measured in terms of the number of processors, the hit ratio of cache memory, the probability of internal operation, and bus bandwidth.

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A Scheduling mechanism for Real-Time Messages on Dual-Link Networks (전송제한시간에 기초한 이중-링크 네트워크상에서 실시간 메시지 스케듈링 기법)

  • Lee, Myeong-Jin;Lee, Jeong-Bae;Jang, Deok-Seong
    • The Transactions of the Korea Information Processing Society
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    • v.1 no.2
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    • pp.244-253
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    • 1994
  • Computer networks need a variety of services. Some services such as, video, voice and plantcontrol traffic require a real-time communication with explicit timing constraints. In this pater, we introduce a real-time communication technique which use a reservation technique on dualilnk networks. We introduce an enhanced technique that determines priorities of the message based on time constraints when real-time messages are transmitted. A simulation was conducted to compare and to analyze traditional technique. We used the SLAM II language to simulate this technique. Message loss rate were compared and analyzed as a performance criteria in this simulation.

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Performance Evaluation of the Common Channel Sinalling Module in TDX-1 (TDX-1 공통선 신호 모듈 성능 평가)

  • 기장근;이성재;정기석;한운용;김덕진;차균현
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.16 no.8
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    • pp.732-744
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    • 1991
  • In this paper, performance evaluation of the common channel signalling module which performs the message transfer part function of the CCITT No.7 in TDX 1 exchange is carried out. Simulation model is developed using SLAM II network nodes according to signalling mode and transrated into SLAM II statement, . The simulation results are compared with experimental results and analyzed in order to get the maximum throughput, processing delay time, bottleneck eiement. Also, in order to get the optimized structure of the CSM, simulation is performed on the vanous case, namely, change of the number of STB, change of STG bus or B bus speed, change of CSIOB, processing speed, change of the number of transfered message per one poll.

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시뮬레이션을 이용한 MIND 형 병렬 컴퓨터의 성능분석

  • Kim, Jong-Hyeon
    • ETRI Journal
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    • v.10 no.3
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    • pp.101-112
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    • 1988
  • 본 연구에서는 과학계산용 병렬 컴퓨터 시스팀의 구조를 설계하고, 설계된 컴퓨터 구조의 소프트웨어 시뮬레이터를 개발하였으며, 여러가지 시뮬레이션을 통하여 시스팀의 성능을 분석하였다. 설계된 시스팀은 H/V-bus 병렬 처리 시스팀 아키텍쳐에 기반을 둔것으로 각종 과학계산을 위한 고속의 프로세서간 통신 메카니즘이 확장 설계되었다. SLAM II 및 FORTRAN을 이용하여 개발된 시뮬레이터는 시스팀 변수들을 이용하여 프로세서의 수와 속도 및 통신 메카니즘의 속도를 쉽게 변화시킬 수 있게하여 여러 조건하에서의 시스팀 성능을 분석하는데 사용되었다. 또한 실제 프로그램이 수행되는 상황에서 프로세서 및 통신 메카니즘의 속도가 시스팀 전체 성능에 미치는 영향을 측정하고 분석하기 위하여 벤치마크를 시뮬레이터를 이용하여 풀었다.

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종합병원의 의료서비스 평가모형 - K 대학병원 사례를 중심으로 -

  • Yu, Ji-Cheol;Hong, Jeong-Eui;Kim, Yong-Beom
    • Proceedings of the Safety Management and Science Conference
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    • 2005.11a
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    • pp.450-462
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    • 2005
  • 우리나라 종합병원의 의료서비스의 질을 향상시킬 수 있는 방안을 모색하기 위해 K대학병원의 소아과와 처방전 서비스를 대상으로 연구를 수행하였다. 연구방법은 시뮬레이션을 수행하여 분석였다. 시뮬레이션을 수행하기 위해서는 네트워크 모델링 방식인 SLAM II를 사용하였다. 분석결과를 요약하면 소아과보다는 처방전의 서비스를 향상시키기 위한 대안적 방법을 고려할 필요가 있는 것으로 분석되었다.

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Scheduling for a Flexible Manufacturing Cell with Transportation Time (유연가공셀에서 운반시간을 고려한 일정계획)

  • 최정상;노인규
    • Journal of the Korean Operations Research and Management Science Society
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    • v.19 no.2
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    • pp.107-118
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    • 1994
  • This research is concerned with production scheduling for a flexible manufacturing cell which consists of two machine centers with unlimited buffer space and a single automatic guided vehicle. The objective is to develop and evaluate heuristic scheduling procedures that minimize maximum completion time. A numerical example illustrates the proposed algorithm. The heuristic algorithm is implemented for various cases by SLAM II. The results show that the proposed algorithm provides better solutions than Johnson's. It also gets good solutions to minimize mean flowtime.

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