KR970056358A - Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode (ATM) exchange system - Google Patents

Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode (ATM) exchange system Download PDF

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KR970056358A
KR970056358A KR1019950052300A KR19950052300A KR970056358A KR 970056358 A KR970056358 A KR 970056358A KR 1019950052300 A KR1019950052300 A KR 1019950052300A KR 19950052300 A KR19950052300 A KR 19950052300A KR 970056358 A KR970056358 A KR 970056358A
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South Korea
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cell
cell assembly
atm
data
channel
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KR1019950052300A
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Korean (ko)
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KR0153933B1 (en
Inventor
이성재
조성래
박태준
김정식
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양승택
한국전자통신연구원
이준
한국전기통신공사
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Priority to KR1019950052300A priority Critical patent/KR0153933B1/en
Publication of KR970056358A publication Critical patent/KR970056358A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H04L49/9057—Arrangements for supporting packet reassembly or resequencing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5638—Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646—Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652—Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

본 발명은 비동기 전달모드(ATM) 교환시스템에서 고정속도 서비스 연동을 위한 셀 조립/분해 장치에 관한 것으로, 현재 ATM셀조립/분해기의 개발 현황을 보면 주로 광대역 터미너어댑터 등의 단말 장치에서 개발되고 있으나 이는 하나 또는 두 개 정도의 연결만을 지원하기 때문에 대규모 가입자를 수용하는 교환시스템에 적용하기는 적당치 않으나, 본 발명의 셀조립/분해기는 교환시스템에서의 적용을 목표로 기본 256개의 연결을 지원하고 모듈단위로 추가함에 의해 용량 확장이 용이해지는 효과가 있다.The present invention relates to a cell assembly / disassembly device for a fixed speed service interworking in an asynchronous transfer mode (ATM) switching system, the current state of development of ATM cell assembly / disassembly is mainly developed in a terminal device such as a broadband terminal adapter However, since it supports only one or two connections, it is not suitable to be applied to an exchange system that accommodates a large number of subscribers. However, the cell assembly / decomposer of the present invention supports basic 256 connections for the purpose of application in an exchange system. In addition, it is easy to expand the capacity by adding the module unit.

Description

비동기 전달모드(ATM) 교환시스템에서 고정속도 서비스 연동을 위한 셀 조립/분해 장치Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode (ATM) exchange system

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

제2도는 본 발명이 속한 PSTN정합장치에서의 서브하이웨어 구성도,2 is a block diagram of a subhighware in a PSTN matching device to which the present invention belongs;

제3도는 본 발명이 속한 ATM교환시스템에서의 셀 구조도,3 is a cell structure diagram of an ATM switching system to which the present invention belongs;

제4도는 본 발명이 속한 ATM연동부 기능 구성도,4 is a functional diagram of the ATM linkage unit belonging to the present invention,

제5도는 본 발명의 셀 조립/분해기의 기능 구성도,5 is a functional configuration diagram of the cell assembly / disassembler of the present invention,

Claims (1)

ATM 교환 시스템에 적용되는 셀 조립/분해장치에 있어서, 8개의 입출력 서브하이웨이에 대한 라인 인터페이스를 담당하는 서브하이웨이 인터페이스수단(23); 상기 서브 하이웨이 인터페이수단(23)을 통해 외부로부터 2쌍의 클럭 및 프레임동기 신호를 수신하고, 클럭 상태를 감시하여 하나의 클럭 및 프레임동기신호를 선택하여 출력하는 클럭선택수단(24); 상기 클럭선택수단(24)에 연결되어 상기 서브 하이웨이 인터페이스수단(23)으로부터 8개의 직렬 서브하이웨이 데이타를 8비트 병렬 데이타스트림으로 다중화하여 전송하는 다중화수단(25); 상기 다중화수단(25)으로부터 입력되는 병렬 타임슬롯 데이타를 수신하여 현재 연결이 설정된 유효한 채널에 대해서 해당 채널 데이타를 조립하여 외부의 ATM 스위치 인터페이스로 전송하는 셀조립수단(26); 상기 셀 조립수단(26)에 연결되어 셀조립에 필요한 제어정보 및 전송을 위해 조립중인 채널 데이타를 저장하는 셀조립용 메모리수단(27); 상기 ATM스위치 인터페이스로부터 수신된 ATM 셀을 임시 저장하는 셀수신 선입선출메모리 수단(28); 로칼루프백 모드가 지정된 경우에는 상기 셀조립수단(26)으로부터 출력된 제어신호 및 셀데이타가 상기 셀 수신 선입선출메모리수단(28)으로 입력되도록 하는 로칼루프백 수단(33); 상기 셀 수신 선입선출메모리수단(28)에 저장된 셀을 읽어 셀헤더내의 연결 식별용 VPI(Vitrual Path Identifier)/VCI(Vitrual Channel Indetifier)에 대응되는 서브하이웨이 채널을 찾아 해당 채널용으로 할당된 버퍼에 셀의 유료부하 데이타를 저장하고 해당 채널 타이밍을 맞춰 저장된 데이터를 옥텟 단위로 전송하는 셀분해수단(29); 상기 셀 분해 수단(29)에 연결되어 셀 분해에 필요한 제어정보 및 전송을 위해 분해중인 채널 데이타를 저장하는 셀 분해용 메모리 수단(30); 상기 셀분해수단(29)으로부터 8비트 병렬 데이터를 수신하여 서브하이웨이별로 역다중화한후, 역다중화된 직렬 비트 스트림을 8개의 서브하이웨이로 전송하는 역다중화수단(31); 및 외부의 연동제어부로부터 셀 조립/분해에 있어 필요한 연결 설정/해제 정보, 스위치 루팅 정보 및 기타 제어정보를 수신하여 상기 셀조립수단(26), 셀분해수단(29)으로 전달하여 상기 셀조립용 메모리수단(27) 및 셀분해용 메모리수단(30)에 저장되도록 하고, 상기 셀조립수단(26) 및 셀분해수단(29)의 상태정보 및 통계 정보를 수집하여 VME 버스를 통해 상기 연동제어부로 전달하는 VME 인터페이스수단(32)을 구비하는 것을 특징으로 하는 비동기 전달모드(ATM) 교환시스템에서 고정속도 서비스 연동을 위한 셀 조립/분해 장치.A cell assembly / decomposition apparatus applied to an ATM switching system, comprising: subhighway interface means (23) for performing line interfaces for eight input / output subhighways; Clock selection means (24) for receiving two pairs of clock and frame synchronization signals from the outside through the sub highway interface means (23), monitoring a clock state, and selecting and outputting one clock and frame synchronization signal; Multiplexing means (25) connected to said clock selecting means (24) for multiplexing eight serial subhighway data from said sub highway interface means (23) into an 8-bit parallel data stream; Cell assembly means (26) for receiving the parallel timeslot data input from the multiplexing means (25) and assembling the corresponding channel data for a valid channel for which a current connection is established and transmitting it to an external ATM switch interface; A cell assembly memory means 27 connected to the cell assembly means 26 for storing control information necessary for cell assembly and channel data being assembled for transmission; A cell reception first-in first-out memory means (28) for temporarily storing an ATM cell received from the ATM switch interface; A locale loopback means 33 for causing a control signal and cell data outputted from the cell assembly means 26 to be inputted into the cell reception first-in first-out memory means 28 when a locale loopback mode is designated; Read a cell stored in the cell reception first-in first-out memory means 28 to find a subhighway channel corresponding to a connection path identification virtual path identifier (VPI) / VCI (Vitrual Channel Indetifier) in a cell header, and to a buffer allocated for the channel. Cell decomposition means 29 for storing the payload data of the cell and transmitting the stored data in octet units according to a corresponding channel timing; A cell decomposition memory means (30) connected to said cell decomposition means (29) for storing control information necessary for cell decomposition and channel data in decomposition for transmission; Demultiplexing means (31) for receiving 8-bit parallel data from the cell decomposing means (29), demultiplexing by subhighways, and then transmitting the demultiplexed serial bit stream to eight subhighways; And receiving connection setting / release information, switch routing information, and other control information necessary for cell assembly / disassembly from an external interlocking control unit, and transmitting the same to the cell assembling means 26 and the cell disassembling means 29 for the cell assembly. And the state information and statistical information of the cell assembly means 26 and the cell disassembling means 29 to be stored in the memory means 27 and the cell disassembly memory means 30 to the interlocking control unit through the VME bus. Cell assembly / disassembly device for fixed speed service interworking in the asynchronous transfer mode (ATM) switching system, characterized in that it comprises a VME interface means for transmitting. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950052300A 1995-12-20 1995-12-20 Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode switching system KR0153933B1 (en)

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KR1019950052300A KR0153933B1 (en) 1995-12-20 1995-12-20 Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode switching system

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KR1019950052300A KR0153933B1 (en) 1995-12-20 1995-12-20 Cell assembly / disassembly device for fixed speed service interworking in asynchronous transfer mode switching system

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KR0153933B1 KR0153933B1 (en) 1998-11-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010087609A (en) * 2000-03-08 2001-09-21 박종섭 Interworking unit between atm and pstn trunk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010087609A (en) * 2000-03-08 2001-09-21 박종섭 Interworking unit between atm and pstn trunk

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