• Title/Summary/Keyword: Performance test Protocol

Search Result 255, Processing Time 0.028 seconds

Design of Multiple-Purpose Protocol Test System (다기능 프로토콜 시험시스템 설계)

  • 최양희
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.15 no.5
    • /
    • pp.434-445
    • /
    • 1990
  • Protocol testing techniques are expanded from the traditional simple function- testing based on the OSI model, to sophisticated performance testing, conformance testing and interoperability testing. In addition, both point-to-point and point-to-multipoint protocols are to be covered. This paper presents a new multiple-purpose protocol test system where the common platform includes the test sequence generation and test result analysis, and the modular test execution part is selectively adjusted according to the test purposes and protocols under test. This paper describes test system for network routing protocol and test system for transport protocol, designed upon the ideas of the multiple-purpose protocol test system.

  • PDF

Performance Analysis and Validation of Railway Signalling Communication Protocol (철도신호용 통신 프로토콜 성능해석 및 검증)

  • Hwang Jong-Gyu;Lee Jae-Ho;Shin Duk-Ho
    • Proceedings of the KSR Conference
    • /
    • 2003.05a
    • /
    • pp.462-467
    • /
    • 2003
  • According to the computerization of railway signalling system, necessity of communication protocol for interface between these equipments is increasing. Therefore the research on communication protocol structure that is required according to computerization trend of these signalling goes. In our research the existed protocol currently used was analyzed, and the simulation modeling for performance analysis is deduced. Based on this simulation model the performance analysis and comparison is carried out, and also validation test is executed about new suggested protocol.

  • PDF

Performance Analysis and Testing of Railway Signalling Communication Protocol (열차제어용 통신프로토콜 구조분석 및 성능검증 시험)

  • Hwang, Jong-Gyu;Lee, Jae-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2003.07b
    • /
    • pp.1318-1320
    • /
    • 2003
  • According to the computerization of railway signalling system, necessity of communication protocol for interface between these equipments is increasing. Therefore the research on communication protocol structure that is required according to computerization trend of these signalling goes. In our research the existed protocol currently used was analyzed, and the simulation modeling for performance analysis is deduced. Based on this simulation model the performance analysis and comparison is carried out, and also validation test is executed about new designed protocol.

  • PDF

A Study on the Performance Evaluation based on Modular Face Recognition System (모듈화된 얼굴인식 시스템을 이용한 성능 시험에 관한 연구)

  • Hong Tae-Hwa;Moon Hyeon-Joon;Shin Yong-Nyuo;Lee Dong-Geun;Kim Jae-Sung
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.42 no.4 s.304
    • /
    • pp.35-44
    • /
    • 2005
  • Face recognition out of biometrics is considerable interesting due to high performance and accessibility in applications to security such as access control and banking service. Therefore, a study on the protocol of the performance test is an important issue to understand the art-of state and to show a direction in future works, in addtion to developing algorithms. We present a design criterion for the performance test protocol of face recognition system and show the result of experiment executed on identification and verification scenario based on PCA algorithm and XM2VTS DB

A Study on AES Performance Assessment Protocol based on Car-to-car cut-out Scenario According to front Emergency Obstacle Avoidance of Preceding Vehicle during Highway Driving (고속도로 주행 시 선행차량의 전방 긴급 장애물 회피에 따른 Car-to-Car Cut-out 시나리오 기반 AES 성능평가 방법 연구)

  • Jinseok, Kim;Donghun, Lee
    • Journal of Auto-vehicle Safety Association
    • /
    • v.14 no.4
    • /
    • pp.84-90
    • /
    • 2022
  • With the popularization of autonomous driving technology, safety has emerged as a more important criterion. However, there are no assessment protocol or methods for AES (Autonomous Emergency Steering). So, this study proposes AES assessment protocol and scenario corresponding to collision avoidance Car-to-Car scenario of Euro NCAP in order to prepare for obstacles that appear after the emergency steering of LV (Leading Vehicle) avoiding obstacles in front of. Autoware-based autonomous driving stack is developed to test and simulate scenario in CARLA. Using developed stack, it is confirmed that obstacle avoidance is successfully performed in CARLA, and the AES performance of VUT (Vehicle Under Test) is evaluated by applying the proposed assessment protocol and scenario.

Performance Test of Asynchronous Process of OGC WPS 2.0: A Case Study for Geo-based Image Processing

  • Yoon, Gooseon;Lee, Kiwon
    • Korean Journal of Remote Sensing
    • /
    • v.33 no.4
    • /
    • pp.391-400
    • /
    • 2017
  • Geo-based application services linked with the Open Geospatial Consortium (OGC) Web Processing Service (WPS) protocol have been regarded as an important standardized framework for of digital earth building in the web environments. The WPS protocol provides interface standards for analysis functionalities within geo-spatial processing in web-based service systems. Despite its significance, there is few performance tests of WPS applications. The main motivation in this study is to perform the comparative performance test on WPS standards. Test system, which was composed of WPS servers, WPS framework, data management module, geo-based data processing module and client-sided system, was implemented by fully open source stack. In this system, two kinds of geo-based image processing functions such as cloud detection and gradient magnitude computation were applied. The performance test of different server environments of non-WPS, synchronous WPS 1.0 and asynchronous WPS 2.0 was carried out using 100 threads and 400 threads corresponds client users on a web-based application service. As the result, at 100 threads, performance of three environments was within an adjacent range in the average response time to complete the processing of each thread. At 400 threads, the application case of WPS 2.0 showed the distinguished characteristics for higher performance in the response time than the small threads cases. It is thought that WPS 2.0 contributes to settlement of without performance problems such as time delay or thread accumulation.

A Vehicle SoC Fault Diagnosis Technique using FlexRay Protocol

  • Kang, Seung-Yeop;Jung, Ji-Hun;Park, Sung-Ju
    • Journal of the Korea Society of Computer and Information
    • /
    • v.21 no.1
    • /
    • pp.39-47
    • /
    • 2016
  • In this paper, we propose vehicle SoC fault diagnosis platform using FlexRay protocol in order to detect the faults of semiconductor control chip even after vehicle production. Before FlexRay protocol by sending NFI (Null Frame Indicator) bit among the header segment and a specific identifier in the payload segment of FlexRay frame, this technique can be distinguishable from normal mode and test mode. By using this technique, it is possible to detect the faults such as performance degradation of vehicle network system caused by the aging or several problems of vehicle semiconductor chip. Also high reliability and safety of vehicle can be maintained by using structural test for vehicle SoC fault detection.

Priority Based Multi-Channel MAC Protocol for Real-Time Monitoring of Weapon Flight Test Using WSNs

  • Min, Joonki;Kim, Joo-Kyoung;Kwon, Youngmi;Lee, Yong-Jae
    • Journal of Sensor Science and Technology
    • /
    • v.22 no.1
    • /
    • pp.18-27
    • /
    • 2013
  • Real-time monitoring is one of the prime necessities in a weapon flight test that is required for the efficient and timely collection of large amounts of high-rate sampled data acquired by an event-trigger. The wireless sensor network is a good candidate to resolve this requirement, especially considering the inhospitable environment of a weapon flight test. In this paper, we propose a priority based multi-channel MAC protocol with CSMA/CA over a single radio for a real-time monitoring of a weapon flight test. Multi-channel transmissions of nodes can improve the network performance in wireless sensor networks. Our proposed MAC protocol has two operation modes: Normal mode and Priority Mode. In the normal mode, the node exploits the normal CSMA/CA mechanism. In the priority mode, the node has one of three grades - Class A, B, and C. The node uses a different CSMA/CA mechanism according to its grade that is determined by a signal level. High grade nodes can exploit more channels and lower backoff exponents than low ones, which allow high grade nodes to obtain more transmission opportunities. In addition, it can guarantee successful transmission of important data generated by high grade nodes. Simulation results show that the proposed MAC exhibits excellent performance in an event-triggered real-time application.

Implementation and performance evaluationof the XTP(xpress transport protocol) for multicasting in high-speed netorks (고속망에서의 멀티캐스트를 위한 고속 수송 프로토콜(XTP)의 구현 및 성능 평가)

  • 이경호;이완직;이선우;김철우;김정삼;장성식;한기준
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.21 no.9
    • /
    • pp.2415-2421
    • /
    • 1996
  • This paper describes implementation and performance evaluation of XTP(Xpress Transport Protocol) onthe Windows NT for multicasting in high-speed communication networks. We designed the protocol byan event-driven method and implemented it in form of network driver in a kernel for performace enhancement. Various applications program are used for its functional test and comparison with the TCP protocol.

  • PDF

SCTS Conformance Test for OMA DS Standard for an Embedded Data Synchronization Gateway (임베디드 자료동기화 게이트웨이를 위한 OMA DS 표준 SCTS 적합성 테스트)

  • Pak, Ju Geon;Park, Kee Hyun
    • IEMEK Journal of Embedded Systems and Applications
    • /
    • v.5 no.4
    • /
    • pp.217-224
    • /
    • 2010
  • Nowadays, people perform their tasks anywhere anytime using their mobile devices. For this reason, data synchronization (DS) between mobile devices and a central server has become one of the most essential technologies in mobile environments. Currently, several mobile DS protocols are proposed and used. However, the existing DS protocols cannot guarantee interoperability between them. To solve the problem, an embedded DS gateway has been developed in our previous study. The gateway runs on a Windows Mobile-based emulator. It converts data on a mobile device into common data specified by OMA DS standard protocol and vice versa. The embedded gateway has been built to support the OMA DS standard protocol. In order to verify that the embedded gateway conforms to the OMA DS standard protocol, two kinds of OMA conformance tests have to be conducted - interoperability test with an OMA DS-based server and conformance test with SCTS (SyncML Conformance Test Suit). In this paper, some parts of the gateway previously built are modified and the modified gateway is installed on a Windows Mobile-based smart phone. And the interoperability test and the conformance test with the SCTS are conducted. The results of the tests show that the embedded DS gateway operates properly on the Windows Mobile-based smart phone and that the gateway passes the tests, verifying its conformity to the OMA DS standard protocol. In addition, DS performance tests show that DS delay times between a real smart phone and a DS server increase gently as the number of DS data increases. In other words, the embedded DS gateway built in this paper can be used for a real smart phone at a reasonable performance cost.