KR940008361A - Signal retransmission method of exchange system - Google Patents

Signal retransmission method of exchange system Download PDF

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Publication number
KR940008361A
KR940008361A KR1019920016307A KR920016307A KR940008361A KR 940008361 A KR940008361 A KR 940008361A KR 1019920016307 A KR1019920016307 A KR 1019920016307A KR 920016307 A KR920016307 A KR 920016307A KR 940008361 A KR940008361 A KR 940008361A
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South Korea
Prior art keywords
transmission
fsnt
signal unit
received
serial number
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KR1019920016307A
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Korean (ko)
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김인철
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정장호
금성정보통신 주식회사
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Priority to KR1019920016307A priority Critical patent/KR940008361A/en
Publication of KR940008361A publication Critical patent/KR940008361A/en

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Abstract

본 발명은 교환 시스템의 신호 재전송 방법에 관한 것으로, L2기능을 구현하는 시스템에서 L1기능이 정상적으로 유지되지 못한경우 이의 정상적인 수행을 위해서 전송로 정보상태를 알수 있는 내부상태 레지스터를 이용하여 일정시간의 과도시간 지연후 유실된 최종전송 메시지를 재전송하여 L2 상태가 유휴로 천이되는 것을 방지하여 전송로가 복원되는 시점에서 바로 서비스를 받을 수 있도록 함과 동시에, 메시지 신호 유니트 전송도중 링크가 완전히 유실되었다 할지라도 타이머를 이용 재전송방식을 사용함으로써 신뢰성이 있는 데이타 송, 수신이 수행되도록 하는 방법을 제공한다.The present invention relates to a signal retransmission method of an exchange system, and when the L1 function is not normally maintained in a system implementing the L2 function, a transient for a predetermined time using an internal state register for knowing the transmission path information state for the normal execution thereof. Resend the last transmission message lost after a time delay to prevent the L2 state from transitioning to idle so that service can be received immediately when the transmission path is restored, and even if the link is completely lost during transmission of the message signal unit. By using a retransmission scheme using a timer, a reliable data transmission and reception is provided.

Description

교환시스템의 신호 재전송방법.Signal retransmission method of switching system.

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

제1도는 교환시스템에서 L2기능수행보드간 신호재전송을 설명하기 위한 기능 블럭도.1 is a functional block diagram illustrating signal retransmission between L2 function performance boards in an exchange system.

제3도는 본 발명에 의한 전송로복구 및 신호재전송과정을 설명하기 위한 흐름도.3 is a flowchart illustrating a transmission path recovery and signal retransmission process according to the present invention.

Claims (2)

L2기능을 구현하는 교환시스템에 있어서, L1기능이 정상적으로 유지되지 못한경우 이의 정상적인 수행을 위해서 전송로 정보상태를 알수있는 내부상태 레지스터를 이용하여 일정시간의 과도시간 지연후 유실된 최종전송 메시지를 재전송하여 상기 L2상태가 유휴로 천이되는 것을 방지하는 것을 특징으로 하는 교환 시스템의 신호 재전송 방법.In an exchange system that implements the L2 function, if the L1 function is not maintained normally, the internal transmission register is used to retransmit the last transmission message lost after a certain period of transient time delay by using an internal status register that can identify the status of the transmission line information. Preventing the L2 state from transitioning to an idle state. 제1항에 있어서, 상기 전송로상에 메시지 신호 유니트(NSU)를 전송하는 단계,재전송 버퍼(RTB)에 있는 최종 메시지 신호 유니트의 순방향 일련번호에 대한 정보(FSNL)가 송신된 최종 MSU의 일련번호에 대한 정보(FSNT)와 동일한지 감시하는 단계, 상기 FSNL=FSNT 이면 확인지연타이머(T7)를 가동시키고 링크고장을 검색하여 전송금지 플래그를 기록시키는 단계, 장애감지 타이머(T8)를 가동시키고 링크가 끊어진 시점에서 수신된 신호 유니트는 폐기하고 수신 리세트단이 인에이블 되면 장애감지타이머(T8)를 오프시키는 단게, 재전송 버퍼(RTB)에 아직 응답신호(ACK)를 얻지못한 MSU가 있는지 감시하는 단계, 송시된 최종 메시지 신호 유니트의 순방향 일련 번호(FSNT)가 수신된 역방향 일련번호(BSNR)보다 크면(FSNT〉BSNR) 확인지연 타이머(T7)를 스톱시키고 전송금지 플래그를 취소하며, 메시지 신호 유니트를 재전송한 다음 다시 확인지연타이머(T7)를 가동시키고 서비스상태로 복귀하는 단계, 상기 송신된 최종 메시지 신호 유니트의 순방향 일련번호(FSNT)가 수신된 역방향 일련번호(BSNR)보다 작은 경우에는 (FSNT〈BSNR)곧 바로 전송금지 플래그(MUS-Inhibitflag)를 취소시키고 서비스상태로 복귀하는 단계를 포함하는 것을 특징으로 하는 교환 시스템의 신호 재전송 방법.The method of claim 1, further comprising: transmitting a message signal unit (NSU) on the transmission path, a series of final MSUs on which information FSNL on the forward serial number of the last message signal unit in the retransmission buffer (RTB) is transmitted. Monitoring whether the number is the same as the information on the number (FSNT), if the FSNL = FSNT, starting a check delay timer (T7), searching for a link failure, recording a transmission prohibition flag, and starting a fault detection timer (T8). When the link is broken, the received signal unit is discarded and when the receiving reset stage is enabled, the fault detection timer (T8) is turned off, and the retransmission buffer (RTB) has not yet received an MSU that has not received an acknowledgment signal (ACK). And if the forward serial number (FSNT) of the last message signal unit sent is greater than the received reverse serial number (BSNR) (FSNT > BSNR), stop the confirmation delay timer T7 and stop transmission flag. Canceling, retransmitting the message signal unit and then starting the acknowledgment delay timer T7 again and returning to the service state; a reverse serial number (BSNR) having received the forward serial number (FSNT) of the last message signal unit transmitted. If smaller, (FSNT < BSNR), immediately canceling the prohibition of transmission flag (MUS-Inhibitflag) and returning to a service state. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920016307A 1992-09-07 1992-09-07 Signal retransmission method of exchange system KR940008361A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000044339A (en) * 1998-12-30 2000-07-15 박태진 Data retransmission method of link layer for improving transmission efficiency in telecommunication system
KR100920589B1 (en) * 1996-09-27 2009-10-08 텍사스 인스트루먼츠 인코포레이티드 Reduced gain spread spectrum communication system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100920589B1 (en) * 1996-09-27 2009-10-08 텍사스 인스트루먼츠 인코포레이티드 Reduced gain spread spectrum communication system and method
KR20000044339A (en) * 1998-12-30 2000-07-15 박태진 Data retransmission method of link layer for improving transmission efficiency in telecommunication system

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