WO1999014886A1 - Systeme de redondance '1:n' et '1:1' pour systeme asn - Google Patents

Systeme de redondance '1:n' et '1:1' pour systeme asn Download PDF

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Publication number
WO1999014886A1
WO1999014886A1 PCT/DE1998/002734 DE9802734W WO9914886A1 WO 1999014886 A1 WO1999014886 A1 WO 1999014886A1 DE 9802734 W DE9802734 W DE 9802734W WO 9914886 A1 WO9914886 A1 WO 9914886A1
Authority
WO
WIPO (PCT)
Prior art keywords
line
assemblies
partner
assembly
ltg
Prior art date
Application number
PCT/DE1998/002734
Other languages
German (de)
English (en)
Inventor
Jörg KÖPP
Andreas Klug
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU12232/99A priority Critical patent/AU739406B2/en
Priority to CA002303538A priority patent/CA2303538A1/fr
Priority to EP98955333A priority patent/EP1016238A1/fr
Publication of WO1999014886A1 publication Critical patent/WO1999014886A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/10—Packet switching elements characterised by the switching fabric construction
    • H04L49/104—Asynchronous transfer mode [ATM] switching fabrics
    • H04L49/105—ATM switching elements
    • 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
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/30—Peripheral units, e.g. input or output ports
    • H04L49/3081—ATM peripheral units, e.g. policing, insertion or extraction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/55—Prevention, detection or correction of errors
    • H04L49/552—Prevention, detection or correction of errors by ensuring the integrity of packets received through redundant connections
    • 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
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H04L2012/5627—Fault tolerance and recovery

Definitions

  • the invention relates to a communication device according to the preamble of patent claim 1.
  • redundancy structures can be provided for the peripheral line assemblies belonging to it. Examples of this are the "1 + 1", the "1: 1” and the “1: N” line module redundancy, as described in "IEEE Journal on Selected Areas in Communications" VOL. 15, N.5, June 1997, pages 795 to 806.
  • a "1 + 1" redundancy structure two line modules are operated in parallel in order to redundantly transmit message signal streams. However, only one of these redundant message signal streams is taken into account for further processing.
  • a single replacement line module is provided in addition to a plurality N of line modules. If an error occurs on one of the N-line modules, the replacement line module is used instead.
  • the communication device relates to such "1: N" line module redundancy.
  • a communication device with such a "1: N” line module redundancy is described.
  • the communication device is connected to a plurality N of transmission lines.
  • the interface to these N transmission lines is formed by N line connections from
  • Selection means of the communication device are connected to N + 1 line assemblies via further N + 1 line connections, which form a "1: N" redundancy group.
  • N the number of lines that are connected as active line assemblies to N transmission lines.
  • the remaining line assembly N + 1 serves as a replacement line assembly. If an error occurs in one of the active line assemblies, the selection means are then reversed in such a way that the transmission path that previously ran between the faulty line assembly and the associated transmission line now runs via the replacement line assembly N + 1.
  • the described communication device has the disadvantage that in the event of failure of such a selector arrangement or if this selector arrangement is replaced as a result, all the transmission lines connected to it and thus the connections running over them are interrupted.
  • a design of a communication device is also claimed.
  • This design provides that the selection means of a "1: N" redundancy group have N signal connections on a first connection side and, on the other hand, only a single signal connection connected to the replacement line assembly on a second connection side.
  • circuit-specific switching means are inserted, which selectively switch the respective transmission line over a first switching path with the active one assigned to it Connect the line module or a second switching path to one of the N signal connections of the selection means.
  • the selection means and the N switching means can be controlled in such a way that in normal operation the N transmission lines are connected directly to the N active line assemblies via the first switching paths of the line-specific switching means, while in replacement mode one of the N active line assemblies has its associated transmission line connected to the associated one via the second switching path Switching means and the selection means is connected to the replacement line assembly.
  • the invention has the advantage that structures which are necessary for the implementation of "1 + 1" line module redundancy are also used for the "1: N" line module redundancy. For the "1 + 1" -
  • Line module redundancy a paired arrangement of line modules is provided, the transmission lines belonging to such a pair of line modules being fed to both line modules.
  • the structure of the "1 + 1" line module redundancy can be used in such a way that the transmission lines of a line module, as in the case of "1 + 1" line module redundancy, are each fed to the paired line module. This means that if the other line module fails, one line module is able to
  • FIG. 1 shows sections of the schematic structure of a communication device according to the present invention using the example of normal operation
  • FIG. 2 shows the communication device shown in FIG. 1 for the case of an alternative operation.
  • FIG. 1 shows normal operation
  • FIG. 2 shows the equivalent operation of the communication device.
  • FIG. 1 shows normal operation
  • FIG. 2 shows the equivalent operation of the communication device.
  • the communication device KE shown in FIG. 1 may be an ATM communication device operating according to the asynchronous transfer mode, which enables the transmission of message signals in the form of message cells in the course of virtual connections. Since such an ATM transmission principle is well known, it will not be discussed in more detail below.
  • the communication device KE has a central coupling arrangement ASN, to which a central control device MPU is assigned to control it.
  • This communication device can be a so-called “cross connect” for setting up virtual leased lines or a switching device ("Switching Node”) to set up virtual dial-up connections. In both cases, the connections are set up from the central control unit MPU.
  • switching Node switching device
  • a plurality of line assemblies are connected to the central coupling arrangement ASN via, for example, bidirectional electrical connections.
  • a number N + 1 is indicated, which, as will be explained in more detail below, form a "1: N" redundancy group and are labeled BG 1 to BG N + 1.
  • the line assemblies are each intended for the connection of at least one peripheral transmission line.
  • the transmission lines are labeled LTG 1 to LTG N according to their assignment to the line assemblies.
  • the remaining line assembly BG N + l serves as a replacement line assembly.
  • Two of the mentioned line assemblies BG 1 to BG N each form partner line assemblies of a pair of assemblies.
  • Two of these module pairs are designated in Figures 1 and 2 with BGP 1 and BGP M.
  • the BGP 1 assembly pair consists of the BG 1 and BG 2 partner line assemblies
  • the BGP M assembly pair consists of the BG N-1 and BG N partner line assemblies.
  • the transmission lines belonging to the two partner line assemblies of a pair of assemblies, in the BGP 1 assembly pair these are, for example, the transmission lines LTG 1 and LTG 2, are fed to the two partner line assemblies in the manner of "1 + 1" line assembly redundancy .
  • the line assemblies BG 1 to BG N each have at the interface to the associated transmission line (LTG 1 to LTG N) a line-specific switch labeled S1, which in the exemplary embodiment is a relay is trained.
  • the respective line module is connected to the associated transmission line via the closed switching path of the respective switch, which is indicated in FIG. 1 for the individual line assemblies.
  • the line assemblies BG 1 to BG N each have at the interface to the transmission line of the associated partner line assembly a switch contact of a line-specific switch labeled S2, which is again designed, for example, as a relay.
  • a spare switching bus EBUS is connected to the remaining switch contact of the respective switch S2, to which the already mentioned replacement line assembly BG N + l is also connected on one side.
  • the other side of this replacement line assembly is connected to the central coupling arrangement ASN via a switch S1 corresponding to the switches S1 mentioned above.
  • the two partner line assemblies belonging to a pair of modules are connected via a bidirectional control line SL, the function of which will be discussed in more detail below.
  • the switches S1 and S2 are initially controlled, for example, in the course of establishing a connection from the central control device MPU.
  • the necessary control signals are transmitted in the form of message cells in the course of fixed virtual connections to the individual line assemblies BG 1 to BG N, an internal transport protocol (ITP) being used for this.
  • ITP internal transport protocol
  • the line assemblies BG1 to BG N + 1 shown in FIGS. 1 and 2 each have an arrangement for signal conversion on the connection path between the line assembly and the coupling arrangement ASN in the present exemplary embodiment, which arrangement uses the example of the line assembly BG1 to denote S4 is.
  • FIG. 1 shows the case in which the communication device KE operates in normal operation, that is to say that in particular the line assemblies BG 1 to BG N function correctly.
  • the transmission lines LTG 1 to LTG N are connected to the coupling arrangement ASN via the line assemblies BG 1 to BG N in order to carry out a normal transmission of message signals (message cells) within the communication device KE.
  • the partner line assemblies of the assembly pairs (BGP1 to BGP M) are each directly connected via a bidirectional control line SL. If an error occurs in one of the partner line assemblies, the switch S1 present in this is opened on the one hand and the connection to the coupling arrangement ASN is thus interrupted. On the other hand, a control signal is transmitted to the partner line module via the control line SL in question. Upon receipt of such a control signal, the switch S2 of this partner line module is then closed and the substitute mode is switched for the faulty partner line module.
  • the switch S1 assigned to the partner line assembly BG 1 is controlled in such a way that its switching path is open and thus the connection path between the transmission line LTG 1 and the coupling arrangement ASN is interrupted.
  • switch S 2 is controlled within the partner line assembly BG 2 in such a way that a closed connection path from the transmission line LTG 1 via the equivalent switching bus EBUS to the alternative line is now module BG N + l out exists, the associated switch Sl is in this replacement mode in the closed state.
  • a transmission of message signals (message cells) can then take place via this replacement line assembly BG N + 1 as a replacement for the faulty partner line assembly BG 1 assumed as an example.
  • Such a replacement mechanism also applies to any other of the partner line assemblies BG 2 to BG N.
  • a modification of the communication device KE can consist in the fact that, in the presence of a large number of line assemblies, several independent redundancy groups are formed from these in the manner described above, each of which has a certain number of active line assemblies and a replacement line assembly assigned to them.
  • each of the line assemblies is assigned only one transmission line.
  • the line assemblies and the equivalent switch bus mentioned can also be designed such that a plurality of transmission lines are connected to the individual line assemblies and the equivalent switch bus has a bus width corresponding to this plurality of transmission lines for the transmission of message signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'installation de communication (KE) proposée présente une configuration de couplage (ASN) avec au moins un nombre N de groupes électroniques de puissance (BG 1 à BG N) actifs, reliés chacun à au moins une ligne de transmission (LTG 1 à LTG N) et formant avec un groupe électronique de puissance supplémentaire de rechange (BG N+1) un groupe de redondance '1:N'. Dans ladite installation, les groupes électroniques de puissance sont disposés par paires selon le modèle d'une redondance '1:1'. Lesdits groupes électroniques de puissance disposent de moyens de commutation (S1, S2) grâce auxquels, lorsqu'un défaut apparaît dans l'un de ces groupes, un trajet de rechange est défini qui passe par le groupe-partenaire électronique de puissance respectif et le groupe électronique de puissance de rechange.
PCT/DE1998/002734 1997-09-16 1998-09-15 Systeme de redondance '1:n' et '1:1' pour systeme asn WO1999014886A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU12232/99A AU739406B2 (en) 1997-09-16 1998-09-15 Communication device for the transmission of message signals
CA002303538A CA2303538A1 (fr) 1997-09-16 1998-09-15 Systeme de redondance "1:n" et "1:1" pour systeme asn
EP98955333A EP1016238A1 (fr) 1997-09-16 1998-09-15 Systeme de redondance "1:n" et "1:1" pour systeme asn

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740741 1997-09-16
DE19740741.2 1997-09-16

Publications (1)

Publication Number Publication Date
WO1999014886A1 true WO1999014886A1 (fr) 1999-03-25

Family

ID=7842548

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002734 WO1999014886A1 (fr) 1997-09-16 1998-09-15 Systeme de redondance '1:n' et '1:1' pour systeme asn

Country Status (6)

Country Link
EP (1) EP1016238A1 (fr)
CN (1) CN1270723A (fr)
AU (1) AU739406B2 (fr)
CA (1) CA2303538A1 (fr)
WO (1) WO1999014886A1 (fr)
ZA (1) ZA988380B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1206081A1 (fr) * 2000-11-10 2002-05-15 Alcatel Dispositif pour transmission t/ou reception de données, et méthode de contrôle de ce dispositif
DE10011268B4 (de) * 2000-03-08 2011-05-19 Tenovis Gmbh & Co. Kg Vermittlungseinrichtung
US11824668B2 (en) * 2020-08-04 2023-11-21 Rohde & Schwarz Gmbh & Co. Kg Redundant system and method of operating a redundant system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6978416B2 (en) * 2002-12-19 2005-12-20 International Business Machines Corporation Error correction with low latency for bus structures
CN100407727C (zh) * 2004-01-18 2008-07-30 中兴通讯股份有限公司 一种基于消息的处理器间通信方法
DE102004050350B4 (de) * 2004-10-15 2006-11-23 Siemens Ag Verfahren und Vorrichtung zur Redundanzkontrolle von elektrischen Einrichtungen
CN100356707C (zh) * 2004-11-16 2007-12-19 华为技术有限公司 单板保护倒换装置
CN100433679C (zh) * 2005-08-26 2008-11-12 上海贝尔阿尔卡特股份有限公司 一种用于通信网络的无缝切换方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5331631A (en) * 1990-10-03 1994-07-19 At&T Bell Laboratories N+K sparing in a telecommunications switching environment
US5436886A (en) * 1994-07-14 1995-07-25 Northern Telecom Limited ATM switch in dual switch plane operation
DE19717584A1 (de) * 1997-04-25 1998-11-05 Siemens Ag Verfahren zum Ersatzschalten von Übertrgungseinrichtungen zur bidirektionalen Übertragung von ATM-Zellen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5331631A (en) * 1990-10-03 1994-07-19 At&T Bell Laboratories N+K sparing in a telecommunications switching environment
US5436886A (en) * 1994-07-14 1995-07-25 Northern Telecom Limited ATM switch in dual switch plane operation
DE19717584A1 (de) * 1997-04-25 1998-11-05 Siemens Ag Verfahren zum Ersatzschalten von Übertrgungseinrichtungen zur bidirektionalen Übertragung von ATM-Zellen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RATHGEB E P ET AL: "THE MAINSTREETXPRESS CORE SERVICES NODE - A VERSATILE ATM SWITCH ARCHITECTURE FOR THE FULL SERVICE NETWORK", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS., vol. 15, no. 5, June 1997 (1997-06-01), NEW YORK, US, pages 795 - 806, XP000657033 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011268B4 (de) * 2000-03-08 2011-05-19 Tenovis Gmbh & Co. Kg Vermittlungseinrichtung
EP1206081A1 (fr) * 2000-11-10 2002-05-15 Alcatel Dispositif pour transmission t/ou reception de données, et méthode de contrôle de ce dispositif
US6999410B2 (en) 2000-11-10 2006-02-14 Alcatel Apparatus for the transmission and/or reception of data, and method for controlling this apparatus
CN100444694C (zh) * 2000-11-10 2008-12-17 阿尔卡塔尔公司 用于发送和/或接收数据的装置及用于控制该装置的方法
US11824668B2 (en) * 2020-08-04 2023-11-21 Rohde & Schwarz Gmbh & Co. Kg Redundant system and method of operating a redundant system

Also Published As

Publication number Publication date
ZA988380B (en) 1999-03-16
AU739406B2 (en) 2001-10-11
AU1223299A (en) 1999-04-05
CA2303538A1 (fr) 1999-03-25
EP1016238A1 (fr) 2000-07-05
CN1270723A (zh) 2000-10-18

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