EP1861781A1 - Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications - Google Patents

Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications

Info

Publication number
EP1861781A1
EP1861781A1 EP06724849A EP06724849A EP1861781A1 EP 1861781 A1 EP1861781 A1 EP 1861781A1 EP 06724849 A EP06724849 A EP 06724849A EP 06724849 A EP06724849 A EP 06724849A EP 1861781 A1 EP1861781 A1 EP 1861781A1
Authority
EP
European Patent Office
Prior art keywords
network element
backup
mgcb
mgc
active
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06724849A
Other languages
German (de)
English (en)
Inventor
Giovanni Laghi
Johannes Prade
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
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 Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Priority to EP06724849A priority Critical patent/EP1861781A1/fr
Publication of EP1861781A1 publication Critical patent/EP1861781A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements

Definitions

  • the invention relates to a method and a system for operating redundant network elements in a communication network, wherein each active network element is assigned a backup network element.
  • a communication network is understood to mean a generic term for all resources through which remote network access points are connected and from which these services with service features are made available for communication purposes.
  • IP Internet Protocol
  • Communication networks typically include a variety of network elements, such as switches, softswitches, routers, or gateways.
  • the network elements are connected to one another by means of physical connections, which form the communication paths for data.
  • the network elements of the network elements are used, for example, to exchange data with other network elements.
  • each network element in a communication network is provided with a network address, by which a unique, logical designation of the network element is made and by which the network element within the communication network is unique can be identified.
  • the network address of the network element is also referred to as the destination address (for the data) because the network element is the destination for that data.
  • Network element therefore generally means that this active network element, a second network element - so-called backup network element - is assigned.
  • This backup network element is largely identical to the active network element in design and configuration. In addition, it must be ensured that the active network element and the backup network element have the same database so that the backup network element can be used in the event of failure or destruction of the active network element ,
  • a network element that is designed to be particularly fail-safe is a so-called media gateway controller.
  • the media gateway controller is used in communication networks at the transition from conventional telecommunications networks to IP networks.
  • the connection of the media gateway controller to the communication network is often done by a so-called edge router or edge router.
  • the Edge Router takes over the special task of converting the data of the Media Gateway Controller into data that can be transmitted in the communication network.
  • a fail-safe (redundant) database is used, in which the data of the active network element are mirrored in the backup network element. This means that the databases must be synchronized by the active network element and the backup network element, either on an ongoing basis or always at a specific time, in order to be consistent.
  • the document EP 1 489 778 A1 describes a method for increasing the reliability of communication networks, in which the activities of a failed network element are taken over by a replacement network element as a result of the transition to another operating mode, for example from "standby" to "active" For example, this transition can take up to two hours. This means that from the switchover from the failed to the replacement network element also this time is taken and during this network element no data traffic is possible. Since in the method described in document EP 1 489 778 A1 both network elements are used in the communication network in different operating modes, an example daily update of the database is necessary. It also occurs This method also has the problem that changes in the database introduced during the update interval are lost when switching to the replacement network element.
  • the present invention has for its object to provide a method and a system by which the data base of the backup network element with the active network element is kept consistent without extensive data synchronization and by which a short switching time between the active network element and the associated backup network element allows become.
  • this object is achieved by a method for operating redundant network elements in a communication network, wherein each active network element is assigned a backup network element, wherein each backup network element is provided a backup control unit, data that is sent to the active network element are also sent to the backup network element, these data are processed separately from the active network element and the backup network element and the data sent by the backup network element traffic is blocked by the backup control unit, but the backup network element, the reaction of the other Network elements is simulated.
  • the advantages achieved by the invention are, in particular, that the databases are set up in parallel in the active and in the backup network element by the introduction of the backup control unit, without a complex adjustment of the databases is necessary.
  • the backup control unit which simulates the reactions of the other network elements, enables the database to be set up correctly. This allows a seamless transition from the active network element to the backup element.
  • this method offers the Advantage that there is no restriction on the geographical distance between the active network element and the associated backup network element.
  • Method provides that monitored by the backup control unit, the active network element and its failure or destruction automatically creates the traffic from the backup network element to the communication network and thus automatically switched from the active network element to the backup network element.
  • the failure of a network element is detected as quickly as possible, the shortest possible switching time reaches the backup network element and prevents a prolonged failure in the communication network.
  • the Internet protocol and an IP network is provided for the communication between the active network element and the backup network element, because the communication paths from the other network elements to the active as well as to the backup network element can already be established in an IP network.
  • the active or the backup network element is then addressed in a simple manner via its respective network address.
  • the active network element can be easily monitored by the backup control unit by means of message exchange.
  • the active network element is connected via a first edge router and the backup control unit of the backup element via a second edge router. The use of redundant edge routers enables greater geographical distance between the active and backup network elements.
  • a media gateway controller is provided as an active network element and as an associated backup network element, since this is used in communication networks at the transition from conventional telecommunications networks to IP networks.
  • a backup network element is provided for an active network element and the backup network element
  • a backup control unit for simulating the traffic between the backup network element and the other network elements in one Communication network, is provided for monitoring the active network element and switching to the backup network element in case of failure or destruction of the active network element.
  • the system according to the invention has the advantage that the reliability and thus the availability of the entire communication network is increased by the backup element which is provided for the active network element.
  • the databases in the active and in the backup network element are set up in parallel, without the need for costly synchronization of the databases.
  • the database of the backup network element is established error-free and enables a seamless transition from the active network element to the backup element.
  • a quick switch to the backup network element is possible because the backup control unit monitors the active network element and performs the switching.
  • the active network element is entered as the first destination address and the associated backup network element as the second destination address for other network elements in the communication network, because both network element in the communication network are known. They can be addressed via the respective destination address. In case of failure of the active network element, the destination address of the backup network element is available and a complex reconfiguration of the communication network is no longer necessary.
  • Fig.l the functional structure of the system according to the invention for the operation of a redundant
  • Network element "Media Gateway Controller” in a communication network in which the inventive method is used
  • FIG. 1 shows, as a communication network IPN, an IP network used for communication, which, in addition to other network elements NE1, NE2, NE3, comprises a redundantly implemented network element "Media Gateway Controller" MGC
  • the network element MGC is a backup network element MGCb - likewise a media gateway controller
  • the active network element MGC and the backup network element MGCb largely comprise the same hardware and software modules as well as databases DB, DBb and both are in active operating mode operated. However, different network addresses IP MGC and IP MGCb in the communication network IPN are assigned to the active network element MGC and the backup network element MGCb.
  • the active network element MGC is connected to the communication network IPN via an edge router ER1.
  • the communication with the other network elements NE1, NE2, NE3 of the communication network IPN is carried out via a communication path 11.
  • data is obtained from the network element MGC, which are sent from the other network elements NE1, NE2, NE3 to the network element MGC. These data are processed by the network element MGC and stored in its database DB.
  • the associated backup network element MGCb is also connected to the communication network IPN via an edge router ER2 and a communication path 12, wherein a backup control element STEb belonging to the backup network element is inserted between the edge router ER2 and the backup network element MGCb. All data sent from the other network elements NE1, NE2, NE3 via the communication path 11 to the active network element MGC are also transmitted in parallel via the communication path 12 to the backup network element MGCb. The data is also processed by the backup network element MGCb, whereby the data traffic sent by the backup network element MGCb to the communications network IPN is blocked by the backup control unit STEb.
  • the reactions of the other network elements NE1, NE2, NE3 from the backup control unit STEb become the backup Network element MGCb simulated.
  • the active network element MGC is monitored by means of messages NA sent by the backup control unit STEb.
  • the active network element MGC is answered with a response message AN.
  • the backup control unit STEb of the backup network element MGCb sends a message NA to the active network element MGC in a first step 1.
  • the backup control unit STEb does not receive the expected response message AN in a second step 2.
  • the blockade of the data traffic from the backup network element MGCb to the communication network IPN-and thus to the other network elements NE1, NE2, NE3-via the edge router ER2 and the communication path 12 is canceled.
  • the function of the active network element MGC is thus adopted in a fourth step 4. Since the network address IP_MGCb as the second destination address in the
  • Network elements NEl, NE2, NE3 of the communication network IPN is stored are sent from the other network elements NEl, NE2, NE3 data in a fifth step automatically to the backup network element MGCb when the connection via the network address IP_MGC, which has been registered as the first destination is, the network element MGC failed.
  • the system for operating redundant network elements illustrated by way of example in FIG. 1 for a network element "Media Gateway Controller” MGC and the associated backup network element MGCb and the method according to the invention shown in FIG. 2 can likewise be used for any other network element NE1, NE2, NE3 in any communication network If the network element NE1, NE2, NE3 is designed to be redundant, the same procedure applies in principle.

Landscapes

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

Abstract

L'invention concerne un procédé et un système pour faire fonctionner des éléments réseaux (MGC) redondants dans un réseau de communication (IPN), un élément réseau (MGCb) de secours étant associé à chaque élément de réseau actif (MGC). Une unité de commande (STEb) de secours est associée à chaque élément réseau (MGCb) de secours et les données qui sont envoyées sur l'élément réseau (MGC) actif sont également envoyées à l'élément réseau (MGCb) de secours. Les données provenant de l'élément réseau (MGC) actif et de l'élément réseau (MGCb) de secours sont traitées séparément, le transport des données envoyées à partir de l'élément réseau (MGCb) de secours étant bloqué par l'unité de commande (STEb) de secours et simule la réaction des autres éléments réseau (NE1, NE2, NE3) à l'élément réseau (MGCb) de secours. De plus, l'unité de commande (STEb) de secours est utilisée pour surveiller l'élément réseau (MGC) actif et pour commuter l'élément réseau (MGCb) de secours lors d'une défaillance de l'élément réseau (MGC) actif. De manière avantageuse, le procédé et le système de l'invention sont caractérisés en ce que les bases de données (DB, DBb) sont créées sans défaut et de manière parallèle à l'élément réseau (MGC) actif et à l'élément réseau (MGCb) de secours grâce à la mise en place de l'unité de commande (STEb) de secours. Dans le cas d'une défaillance, une commutation automatique (3, 4, 5) de l'élément réseau (MGC) actif est effectué sur l'élément réseau (MGCb) de secours sans grande période de ralentissement.
EP06724849A 2005-03-17 2006-02-16 Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications Withdrawn EP1861781A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06724849A EP1861781A1 (fr) 2005-03-17 2006-02-16 Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05102094A EP1703399A1 (fr) 2005-03-17 2005-03-17 Méthode et appareil pour l'exploitation des éléments redondants de réseau dans un réseau de communication
PCT/EP2006/060005 WO2006097395A1 (fr) 2005-03-17 2006-02-16 Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications
EP06724849A EP1861781A1 (fr) 2005-03-17 2006-02-16 Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications

Publications (1)

Publication Number Publication Date
EP1861781A1 true EP1861781A1 (fr) 2007-12-05

Family

ID=34938998

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05102094A Withdrawn EP1703399A1 (fr) 2005-03-17 2005-03-17 Méthode et appareil pour l'exploitation des éléments redondants de réseau dans un réseau de communication
EP06724849A Withdrawn EP1861781A1 (fr) 2005-03-17 2006-02-16 Procede et systeme pour faire fonctionner des elements reseau redondants dans un reseau de communications

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05102094A Withdrawn EP1703399A1 (fr) 2005-03-17 2005-03-17 Méthode et appareil pour l'exploitation des éléments redondants de réseau dans un réseau de communication

Country Status (3)

Country Link
US (1) US20080281955A1 (fr)
EP (2) EP1703399A1 (fr)
WO (1) WO2006097395A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20105878A (fi) 2010-08-24 2012-02-25 Tellabs Oy Tiedonsiirtoverkon verkkoelementin suojaus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002084363A (ja) * 2000-09-06 2002-03-22 Nec Corp ゲートウェイシステム及びそれに用いる回線制御方法
EP1550255A4 (fr) * 2002-09-20 2006-06-07 Santera Systems Inc Procedes et dispositifs pour localiser des ordinateurs hotes de traitement d'appels telephoniques redondants dans des emplacements geographiquement separes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006097395A1 *

Also Published As

Publication number Publication date
WO2006097395A1 (fr) 2006-09-21
US20080281955A1 (en) 2008-11-13
EP1703399A1 (fr) 2006-09-20

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