KR960016278A - CPCS trailer handler with pad - Google Patents

CPCS trailer handler with pad Download PDF

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Publication number
KR960016278A
KR960016278A KR1019940028211A KR19940028211A KR960016278A KR 960016278 A KR960016278 A KR 960016278A KR 1019940028211 A KR1019940028211 A KR 1019940028211A KR 19940028211 A KR19940028211 A KR 19940028211A KR 960016278 A KR960016278 A KR 960016278A
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KR
South Korea
Prior art keywords
trailer
detection unit
error detection
count
error
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KR1019940028211A
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Korean (ko)
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KR970002727B1 (en
Inventor
윤성욱
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배순훈
대우전자 주식회사
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Priority to KR94028211A priority Critical patent/KR970002727B1/en
Publication of KR960016278A publication Critical patent/KR960016278A/en
Application granted granted Critical
Publication of KR970002727B1 publication Critical patent/KR970002727B1/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • 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

Abstract

본 발명은 패드를 고려한 CPCS 트레일러 처리장치에 관한 것으로, 스타트(START)신호에 의해 카운트하여 제1 내지 제4트레일러선택신호와 제1 내지 제4카운트비트를 발생하는 제어신호발생부(3)와; 제1트레일러선택신호(C-t-1)에 의해 선택되는 제1카운트비트(count-l[1.0])에 따라 선택된 데이타를 입력하여 트레일러 에러를 검출하는 제1트레일러 에러검출부(301); 제2 내지 제4트레일러 에러검출부(302-4); 및 상기 제1트레일러 에러검출부(301)와 제2트레일러 에러검출부(302), 제3트레일러 에러검출부(303), 제4트레일러 에러검출부(304)의 출력을 입력하여 패드(PAD) 신호에 따라 하나를 선택하는 선택부(40)를 구비하여 패드가 있을 경우에도 신속하게 트레일러를 처리한다.The present invention relates to a CPCS trailer processing apparatus in consideration of a pad, comprising: a control signal generator (3) for counting by a start signal and generating first to fourth trailer selection signals and first to fourth count bits; ; A first trailer error detection unit 301 for detecting a trailer error by inputting data selected according to a first count bit count-l [1.0] selected by the first trailer selection signal Ct-1; Second to fourth trailer error detection units 30 2-4 ; And the output of the first trailer error detection unit 30 1 , the second trailer error detection unit 30 2 , the third trailer error detection unit 30 3 , and the fourth trailer error detection unit 30 4 by inputting a pad (PAD). It is equipped with a selector 40 for selecting one according to the signal to quickly process the trailer even if there is a pad.

Description

패드를 고려한 CPCS 트레일러 처리장치CPCS trailer handler with pad

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 패드를 교려한 CPCS 트레일러 처리장치를 설명하기 위하여 도시한 것으로서, (가)는 AAL계층의 데이타 흐름 구조를 도시한 도면, (나)는 CPCS-PDU 데이타의 포맷을 도시한 도면,1 is a diagram illustrating a CPCS trailer processing apparatus in which a pad is in accordance with the present invention, (A) shows a data flow structure of an AAL layer, and (B) shows a format of CPCS-PDU data. One drawing,

제2도는 본 발명에 따른 패드를 고려한 CPCS 트레일러 처리장치를 도시한 불럭도,2 is a block diagram showing a CPCS trailer processing apparatus considering a pad according to the present invention;

제3도의 (가) 내지 (마)는 본 발명에 따른 CPCS트레일러 처리장치를 설명하기 위하여 도시한 개략적인 타이밍도.3A to 3E are schematic timing diagrams for explaining a CPCS trailer processing apparatus according to the present invention.

Claims (3)

ATM통신방식의 AAL 3/4 프로로콜에 따른 수신처리창치에 있어서, 스타트(START)신호에 의해 카운트하여 제1트레일러선택신호(c-t-1) 및 제1카운트비트(count-1[1..0)와 제2트레일러선택신호(c-t-2) 및 제2카운트비트(count-2[1..0])와 제2트레일러선택신호(c-t-3) 및 제3카운트비트(count-3[1..0])와 제4트레일러선택신호(c-t-4) 및 제4카운트비트(count-4[1..0])를 발생하는 제어신호발생부(3)와; 제1트레일러선택신호(c-t-1)에 의해 선택되어 제1카운트비트(count-1[1..0])에 따라 선택된 데이타를 입력하여 트레일러 에러를 검출하는 제1트레일러 에러검출부(301); 제2트레일러선택신호(c-t-2)에 의해 선택되어 제2카운트비트(coumt-2[1..0])에 따라 데이타를 입력하여 트레일러 에러를 검출하는 제2트레일러 에러검출부(302); 제3트레일러선택신호(c-t-3)에 의해 선택되어 제3카운트비트(coumt-3[1..0])에 따라 선택된 데이타를 입력하여 트레일러 에러를 검출하는 제3트레임러 에러검출부(303); 제4트레일러선택신호(c-t-4)에 의해 선택되어 제4카운트비트(coumt-4[1..0])에 따라 선택된 데이타를 입력하여 트레일러 에러를 검출하는 제4트레일러 에러검출부(304); 및 상기 제1트레일러에러검출부(301)와 제2트레일러 에러검출부(302). 제3트레일러 에러검출부(303), 제4트레일러 에러검출부(304)의 출력을 입력하여 패드(PAD)신호에 따라 하나를 선택하는 선택부(40)를 구비한 것을 특징으로 하는 ATM통신방식의 패드를 고려한 CPCS트레일러 처리장치.In the receive processing window according to the AAL 3/4 protocol of the ATM communication system, the first trailer selection signal ct-1 and the first count bit count-1 [1. .0) and the second trailer selection signal ct-2 and the second count bit (count-2 [1..0]) and the second trailer selection signal ct-3 and the third count bit (count-3) [1..0]), a control signal generator (3) for generating the fourth trailer selection signal (ct-4) and the fourth count bit (count-4 [1..0]); A first trailer error detection unit 301 which detects a trailer error by inputting data selected by the first trailer selection signal ct-1 and selected according to the first count bit count-1 [1..0]; A second trailer error detection unit 30 2 which is selected by the second trailer selection signal ct-2 and inputs data according to the second count bit cumt-2 [1..0] to detect a trailer error; A third trailer error detection unit 30 3 which detects a trailer error by inputting data selected by the third trailer selection signal ct-3 and selected according to the third count bit (coumt-3 [1..0]). ); A fourth trailer error detection unit 30 4 which detects a trailer error by inputting data selected by the fourth trailer selection signal ct-4 and selected according to the fourth count bitcoumt-4 [1..0]. ; And a first trailer error detection unit 30 1 and a second trailer error detection unit 30 2 . ATM communication method comprising a selector 40 which inputs the outputs of the third trailer error detector 30 3 and the fourth trailer error detector 30 4 and selects one according to the PAD signal. CPCS trailer processing apparatus in consideration of the pad. 제1항에 있어서, 상기 제어신호발생부(3)는 스타트(start)신호에 의해 카운트를 시작하는 8다운 카운터(10)와; 8다운 카운터(l0)의 출력에 따라 1클럭씩 지연된 제1 내지 제4트레일러선택신호 및 제1 내지 제4카운터비트를 출력 발생하는 프로그래머블 어레이 로직(PAL)로 구성되는 것을 특징으로 하는 ATM통신방식의 패드를 고려한 CPCS트레일러처리장치.The control signal generator (3) according to claim 1, further comprising: an eight-down counter (10) which starts counting by a start signal; ATM communication method comprising a programmable array logic (PAL) for generating the first to fourth trailer selection signals delayed by one clock and the first to fourth counter bits according to the output of the 8-down counter 10. CPCS trailer processing apparatus in consideration of the pad. 제1항에 있어서, 상기 제1 내지 제4트레일러 에러검출부(301∼304)는 CPCS트레일러 데이타중 얼라인먼트(AL)데이타를 래치하여 얼라이먼트 에러를 검색하는 얼라인먼트 에러검출부(32)와; CPCS트레일러 데이타중 끝태그(Btag)데이타를 래치하여 시작태그(Btag)와 비교하여 태그에러를 검출하는 태그에러검출부(33); CPCS트레일러 데이타중 길이표시(LI)데이타를 래치하여 버퍼할당(BAsize) 데이타와 비교하여 길이에러를 검출하는 길이에러검출부(34); 및 트레일러선택(c-t-1)신호에 의해 인에이블된 후 제1카운트비트(coumt-1[1..0])에 따라 상기 얼라인먼트 에러검출부(32)나 태그에러검출부(33)나 길이에러검출부(34)중 나하를 선택하는 선택기(31)를 구비한 것을 특징으로 하는 ATM통신방식의 패드를 고려한 CPCS트레일러 처리장치.2. The apparatus of claim 1, wherein the first to fourth trailer error detection units (30 1 to 30 4 ) comprise an alignment error detection unit (32) for latching alignment (AL) data among CPCS trailer data to search for alignment errors; A tag error detection unit 33 for latching an end tag data of CPCS trailer data and detecting a tag error by comparing with a start tag Btag; A length error detector 34 which latches the length display LI data of the CPCS trailer data and detects the length error in comparison with the buffer allocation data; And the alignment error detection unit 32, the tag error detection unit 33, or the length error detection unit according to the first count bit (coumt-1 [1..0]) after being enabled by the trailer selection (ct-1) signal. A CPCS trailer processing apparatus in consideration of pads of an ATM communication system, comprising a selector 31 for selecting Naha from (34). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR94028211A 1994-10-31 1994-10-31 Cpcs trailer processor considering pad KR970002727B1 (en)

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KR960016278A true KR960016278A (en) 1996-05-22
KR970002727B1 KR970002727B1 (en) 1997-03-08

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