KR20000060039A - Protection switching method of communication channel for recovery of link failure in V5.2 interface - Google Patents

Protection switching method of communication channel for recovery of link failure in V5.2 interface Download PDF

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Publication number
KR20000060039A
KR20000060039A KR1019990008065A KR19990008065A KR20000060039A KR 20000060039 A KR20000060039 A KR 20000060039A KR 1019990008065 A KR1019990008065 A KR 1019990008065A KR 19990008065 A KR19990008065 A KR 19990008065A KR 20000060039 A KR20000060039 A KR 20000060039A
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South Korea
Prior art keywords
link
channel
communication channel
protection switching
standby
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KR1019990008065A
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Korean (ko)
Inventor
김영환
방효찬
김성칠
서창렬
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이계철
한국전기통신공사
서평원
엘지정보통신 주식회사
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Priority to KR1019990008065A priority Critical patent/KR20000060039A/en
Publication of KR20000060039A publication Critical patent/KR20000060039A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13521—Indexing scheme relating to selecting arrangements in general and for multiplex systems fault management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13565—Indexing scheme relating to selecting arrangements in general and for multiplex systems restoration, e.g. disaster recovery, self-healing networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/16—Service observation; Fault circuit; Testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/167—Redundancy

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

Abstract

PURPOSE: A protection switching method of a communication channel when a link error is recovered in V5.2 interface is provided for quickly reopening a service by implementing a protection switching operation in a link which is first recovered. CONSTITUTION: In a normal state, the routine is in the standby mode until a link including an active c-channel and a link including a standby C-channel are removed when an error occurs in both links when the V5.2 service is being provided. In this state, when the link including the standby C-channel is recovered(d), the protection switching is performed(e) to the link including the standby C-channel for thereby transmitting a message. In order to normally perform the protection switching operation, the data link with respect to the protection protocol must be previously set.

Description

Ｖ5.2 인터페이스 상의 링크장애 복구시 통신채널의 보호절체 방법 {Protection switching method of communication channel for recovery of link failure in V5.2 interface}5.2 Protection switching method of communication channel for recovery of link failure in V5.2 interface

본 발명은 V5.2 인터페이스 상의 링크장애 복구시 통신채널(Communication : 이하 C채널이라 칭한다)의 보호절체 방법에 관한 것으로, 링크장애로 인하여 액티브 C채널과 스탠바이 C채널을 포함하는 링크가 모두 절단된 상태에서 액티브 또는 스탠바이 링크에 무관하게 먼저 장애가 복구되는 채널로 보호절체가 수행될 수 있도록 하므로써, V5.2 서비스를 신속히 재개할 수 있도록 하기위한 통신채널 보호절체 방법에 관한 것이다.The present invention relates to a protection switching method of a communication channel (communication: hereinafter referred to as a C channel) during link failure recovery on a V5.2 interface, wherein a link including an active C channel and a standby C channel is disconnected due to a link failure. The present invention relates to a communication channel protection switching method for enabling a quick restart of a V5.2 service by allowing protection switching to be performed first to a channel in which a failover occurs regardless of an active or standby link.

V5.2 프로토콜을 사용하는 교환 시스팀의 링크 장애에 대한 개략적인 구조를 살펴보면 도 1에 도시한 바와 같이, 가입자 망(AN : Access Network)(2)과, V5.2인터페이스를 통해 연결되는 로컬 교환기(1)가 구비되어 있을 때 상기 AN(2)과 로컬 교환기(1) 사이에는 V5.2 프로토콜 메시지를 전송하는데 사용되는 액티브 C채널을 포함한 링크와 스탠바이 C채널을 포함한 링크가 설정되어 있다.Looking at the schematic structure of the link failure of the switching system using the V5.2 protocol, as shown in Figure 1, the local exchange is connected to the access network (AN) (2), and through the V5.2 interface When (1) is provided, the link including the active C channel and the standby C channel which are used for transmitting the V5.2 protocol message are established between the AN 2 and the local exchange 1.

이러한 상태에서 액티브 C채널을 포함한 링크를 통해 V5.2 프로토콜 메시지를 전송하다가 이 링크에 장애가 발생하면(a), 즉시 보호 절체(Protection Switching)가 수행되고 스탠바이 C채널을 포함한 링크가 재 설정되며(b). 이 후의 메시지 송신은 상기 스탠바이 C채널을 포함한 링크를 통해 수행된다.In this state, if a V5.2 protocol message is sent over a link containing an active C channel and this link fails (a), protection switching is performed immediately and the link containing the standby C channel is reestablished ( b). Subsequent message transmissions are performed over the link containing the standby C channel.

그러나 이와 같은 상태에서 도 2에 도시한 바와 같이 스탠바이 C채널을 포함한 링크에도 장애가 발생하면 각 링크에 설정된 통신 경로들은 모두 절단 상태가 되어 V5.2 인터페이스는 서비스 불가 상태가 된다.However, in such a state, as shown in FIG. 2, if a link including a standby C channel fails, all communication paths set in each link are disconnected, and the V5.2 interface becomes unserviceable.

이와 같은 상태에서 V5.2 인터페이스가 서비스를 재개하기 위해서는 종래에는 두 링크가 모두 복구될 때까지 기다릴 수밖에 없는데, 간혹 액티브 C채널을 포함한 링크 보다 스탠바이 C채널을 포함한 링크가 먼저 복구가 되는 경우가 있다.In this state, in order for the V5.2 interface to resume service, it is conventionally required to wait until both links are restored. In some cases, the link including the standby C channel may be restored before the link including the active C channel. .

그러나 종래에는 상기 스탠바이 C채널을 포함한 링크가 먼저 복구되었다 할지라도 이 스탠바이 C채널이 복구되었는지를 판단하는 프로텍션 프로토콜(Protection Protocol)의 데이터링크가 설정되어 있지 않기 때문에 액티브 C채널을 포함한 링크가 복구될 때까지는 링크를 재 설정하지 못하고 여전히 절단된 상태로 남게 된다.However, in the related art, even if the link including the standby C channel is restored first, since the data link of the protection protocol for determining whether the standby C channel is restored is not established, the link including the active C channel is restored. Until you do not reestablish the link, it will still be broken.

따라서 링크 장애로 인한 메시지 전송 절단의 신속한 장애 복구가 되지 않고 있는 단점이 있다.Therefore, there is a disadvantage that rapid failure recovery of message transmission truncation due to link failure is not possible.

본 발명은 상기에 기술한 바와 같은 종래의 문제점을 감안하여, 장애가 발생한 링크가 포함하는 채널의 유형(액티브 or 스탠바이)에 상관없이 먼저 복구된 링크로 통신채널의 보호절체가 수행되도록 하므로써, 신속한 장애 복구를 가능하도록 하는 것을 목적으로 한다.In view of the conventional problems as described above, the present invention provides a fast failure by allowing protection switching of a communication channel to be performed on the first restored link regardless of the type (active or standby) of the channel included in the failed link. The purpose is to enable recovery.

도 1은 종래의 링크장애 복구시 통신채널의 보호절체 방법을 설명하기 위한 도면.1 is a diagram illustrating a protection switching method of a communication channel in a conventional link failure recovery.

도 2는 종래의 링크장애 복구시 통신채널의 보호절체 방법의 문제점을 설명하기 위한 도면.2 is a view for explaining the problem of the protection switching method of the communication channel in the conventional link failure recovery.

도 3은 본 발명에 의한 링크장애 복구시 통신채널의 보호절체 방법을 설명하기 위한 도면.3 is a diagram illustrating a protection switching method of a communication channel during link failure recovery according to the present invention.

＜ 도면의 주요부분에 대한 부호의 설명 ＞<Explanation of symbols for the main parts of the drawings>

1 : 로컬 교환기(LE) 2 : 가입자 망(AN)1: local exchange (LE) 2: subscriber network (AN)

상기의 목적을 달성하기 위해, V5.2 서비스를 제공하는 통신 시스팀에서 액티브 통신채널을 포함한 링크와 스탠바이 통신채널을 포함한 링크의 장애 복구 시 통신채널 보호절체 방법에 있어서,In order to achieve the above object, in a communication system providing a V5.2 service communication channel protection switching method in the failure recovery of the link including the active communication channel and the link including the standby communication channel,

V5.2 인터페이스 상에서 액티브 통신채널을 포함하는 링크와 스탠바이 통신채널을 포함하는 링크 모두에 장애가 발생하였을 경우, 상기 스탠바이 통신채널을 포함한 링크의 프로텍션 프로토콜에 대한 데이터 링크를 재 설정하여, 장애 복구 상태를 감지하고 먼저 장애가 복구된 통신채널로 보호 절체(Protection Switching)가 수행되도록 하는 것을 특징으로 한다.In the event of a failure of both the link including the active communication channel and the link including the standby communication channel on the V5.2 interface, the data link for the protection protocol of the link including the standby communication channel is reconfigured and the failure recovery state is reset. It is characterized in that the protection switching is performed first to the detection and communication channel in which the fault is recovered.

상술한 목적, 특징 및 장점은 첨부된 도면과 관련한 다음의 상세한 설명을 통하여 보다 분명해 질 것이다. 이하 첨부된 도면을 참조하여 본 발명의 실시 예를 상세히 설명하면 다음과 같다.The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 의한 링크장애 복구방법을 설명하기 위한 도면으로, 정상적인 상태에서 V5.2 서비스를 제공하던 중 액티브 C채널을 포함한 링크와, 스탠바이 C채널을 포함한 링크에 모두 장애가 발생하였을 경우(a, c) 각 링크가 복구되기를 기다린다.3 is a diagram illustrating a method for recovering a link failure according to the present invention. In the case of providing a V5.2 service in a normal state, a failure occurs in both a link including an active C channel and a link including a standby C channel ( a, c) Wait for each link to recover.

이러한 상태에서 먼저 스탠바이 C채널이 포함된 링크가 장애로부터 복구되면(d) 보호절체를 상기 스탠바이 C채널이 포함된 링크로 수행하여(e) 다시 메시지 전송이 수행되도록 하는 바, 상기 스탠바이 C채널이 포함된 링크가 복구되었음을 인지할 수 있도록 하기 위해서 다음과 같은 사항을 추가한다.In this state, when a link including a standby C channel is first recovered from a failure (d), the protection switching is performed to the link including the standby C channel (e) so that the message transmission is performed again. To make sure that the included link is recovered, add the following:

즉, 보호절체를 정상적으로 수행하기 위해서는 프로텍션 프로토콜에 대한 데이터 링크가 미리 설정되어야 만 한다. 이는 상기 스탠바이 C채널을 포함한 링크가 재 복구되었는지의 여부를 체크할 수 있어야 한다는 것이며, 이를 통해 링크가 복구되었으면 스탠바이 C채널을 포함한 링크를 통해 먼저 메시지 전송이 수행될 수 있도록 하는 것이다.That is, in order to perform protection switching normally, the data link for the protection protocol must be set in advance. This means that it is possible to check whether or not the link including the standby C channel has been restored. Through this, if the link is restored, the message transmission can be performed first through the link including the standby C channel.

이상에서 상세히 설명한 바와 같이 본 발명은 통신채널을 이용한 서비스 제공시 액티브 C채널 또는 스탠바이 C채널을 포함한 링크에 모두 장애가 발생하였을 경우, 먼저 복구가 된 링크로 보호절체가 일어날 수 있도록 하여, 통신 서비스가 신속하게 제공되도록 하는 잇점을 수반한다.As described in detail above, the present invention provides protection switching to a restored link when a failure occurs in a link including an active C channel or a standby C channel when providing a service using a communication channel. It entails the benefit of being provided quickly.

아울러 본 발명의 바람직한 실시예는 예시의 목적을 위해 개시된 것이며, 당업자라면 본 발명의 사상과 범위안에서 다양한 수정, 변경, 부가등이 가능할 것이며, 이러한 수정 변경 등은 이하의 특허 청구의 범위에 속하는 것으로 보아야 할 것이다.In addition, a preferred embodiment of the present invention is disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (1)

V5.2 서비스를 제공하는 통신 시스팀에서 액티브 통신채널을 포함한 링크와 스탠바이 통신채널을 포함한 링크의 장애 복구 시 통신채널 보호절체 방법에 있어서,A communication channel protection switching method in a failure recovery of a link including an active communication channel and a link including a standby communication channel in a communication system providing a V5.2 service, V5.2 인터페이스 상에서 액티브 통신채널을 포함하는 링크와 스탠바이 통신채널을 포함하는 링크 모두에 장애가 발생하였을 경우, 상기 스탠바이 통신채널을 포함한 링크의 프로텍션 프로토콜에 대한 데이터 링크를 재 설정하여, 장애 복구 상태를 감지하고 먼저 장애가 복구된 통신채널로 보호 절체(Protection Switching)가 수행되도록 하는 것을 특징으로 하는 V5.2 인터페이스 상의 링크장애 복구 시 통신채널의 보호절체 방법.In the event of a failure of both the link including the active communication channel and the link including the standby communication channel on the V5.2 interface, the data link for the protection protocol of the link including the standby communication channel is reconfigured and the failure recovery state is reset. A method of protection switching of a communication channel during link failure recovery on a V5.2 interface, characterized in that detection and protection switching is performed first to a communication channel in which a failure is recovered.
KR1019990008065A 1999-03-11 1999-03-11 Protection switching method of communication channel for recovery of link failure in V5.2 interface KR20000060039A (en)

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