KR940025228A

KR940025228A - Asynchronous Delivery Mode (ATM) Traffic Generator

Info

Publication number: KR940025228A
Application number: KR1019930006914A
Authority: KR
Inventors: 최대우; 김철규; 박홍식
Original assignee: 양승택; 재단법인 한국전자통신연구소
Priority date: 1993-04-24
Filing date: 1993-04-24
Publication date: 1994-11-19
Also published as: KR950015087B1

Abstract

본 발명은 광대역 종합 정보 통신망(B-ISDN)에서 사용하는 비동기 전달 모드(ATM)에서의 트래픽 발생기에 관한 것이다. 외부로부터 타임 스탬프 신호와 53분주 클럭을 입력하고 마스터 타이머 값과 비교하여 셀열1 전송 명령을 발생하는 타임 스탬프 비교수단(1), 외부로부터 셀열 2 송출 주신호와 53분주 클럭을 입력받아 셀렬2 송출 명령을 발생하는 셀열2 송출 주기 타이머 수단(6), 상기 타임 스탬프 비교수단(1)으로부터의 셀열1 전송명령과 상기 셀열2 송출 주기 타이머 수단(6)으로부터의 셀열2 전송명령을 조합하여 셀열1선택, 휴지셀 선택, 셀열2 선택신호를 발생하는 송신셀열 결정 수단(2), 53분주 클럭과 상기 송신 셀열 결정수단(2)의 선택 신호를 입력받고 외부로부터의 셀헤더와 페이로드 신호를 입력받아 셀을 발생하는 셀 생성수단(4), 53분주 클럭과 상기 셀 생성수단(4)으로부터 발생된 셀을 입력받고 물리층으로부터 읽기(read)클럭을 입력하여 데이타 버스로 연결된 물리층과의 정합을 위해 동기신호와 읽기유호신호를 발생하기 위한 물리층 정합수단(5)을 구비하여 TAM 전송시스템이나 ATM 교환시스템 등에서 트래픽 형태를 바꾸어 가면서 장시간 실험하여야 하는 경우, 사용자가 임의의 타임 스탬프를 입력해줌으로써 트래픽의 패턴을 바꾸면서 셀을 발생할 수 있는 효과가 있다.The present invention relates to a traffic generator in an asynchronous delivery mode (ATM) for use in a broadband integrated information network (B-ISDN). Time stamp comparing means (1) for inputting a time stamp signal and a 53 division clock from an external source and generating a cell string 1 transmission command by comparing with a master timer value, and receiving a cell string 2 transmission main signal and a 53 division clock from an external device Cell sequence 1 by combining a cell sequence 2 sending cycle timer means 6 for generating a command, a cell sequence 1 transfer instruction from the time stamp comparing means 1, and a cell sequence 2 sending instruction from the cell sequence 2 sending cycle timer means 6; Transmit cell sequence determining means (2) for generating selection, idle cell selection, cell sequence 2 selection signal, 53 division clock and selection signal of the transmit cell sequence determination means (2) are inputted, and cell header and payload signals from the outside are inputted. The cell generating means 4 which receives the generated cell, the 53 division clock, and the cell generated by the cell generating means 4 are input, and a read clock is input from the physical layer to be connected to the data bus. If the user needs to experiment for a long time while changing the traffic type in a TAM transmission system or an ATM switching system by including a physical layer matching means 5 for generating a synchronization signal and a read signal for matching with the relayer, By inputting, the cell can be generated while changing the traffic pattern.

Description

Asynchronous Delivery Mode (ATM) Traffic Generator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 개략적인 블럭구성도, 제2도는 본 발명의 상세 블럭 구성도.1 is a schematic block diagram of the present invention, Figure 2 is a detailed block diagram of the present invention.

Claims

Time stamp comparison means (1) for inputting a time stamp signal and a 53 division clock from an external source and generating a cell string 1 transfer command by comparing with a master timer value, and receiving a cell string 2 transmission cycle signal and a 53 division clock from an external device Cell sequence 1 by combining a cell sequence 2 sending cycle timer means 6 for generating a command, a cell sequence 1 transfer instruction from the time stamp comparing means 1, and a cell sequence 2 sending instruction from the cell sequence 2 sending cycle timer means 6; Transmit cell sequence determining means (2) for generating selection, idle cell selection, cell sequence 2 selection signal, 53 division clock and selection signal of the transmit cell sequence determination means (2) are inputted, and cell header and payload signals from the outside are inputted. The cell generating means 4 which receives the generated cell, the 53 division clock, and the cell generated from the cell generating means 4 are inputted, and a read clock is input from the physical layer to be connected to the data bus. For mating with the richeung asynchronous transfer mode (ATM) traffic generator, it characterized in that the matching means having a physical layer (5) for generating a read signal and a synchronization signal yuho.

2. The apparatus of claim 1, wherein the time stamp comparing means (1) comprises; From a FIFO memory 11 receiving a time stamp input signal and a write signal, a master timer 12 that sequentially counts the current time, a time stamp from the FIFO memory 11 and the master timer 12 And a comparison means (13) for receiving the current time of the signals and comparing them with each other to generate a cell string 1 transfer command and providing a read clock to the FIFO memory (11).

The method of claim 1, wherein the cell generating means (4) comprises; Generates a stored cell by receiving a predefined cell type input signal and a write clock from the outside, and receiving a cell string 1 selection, an idle cell selection, and a cell string 2 selection signal from the transmitting cell string determining means 2 into the address line. And a time stamp inserting means (42) for inserting a time at which a cell is sent to a cell generated in said DPRAM (41).

※ Note: The disclosure is based on the initial application.