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Tandem connection activation/deactivation

A serial connection and activation request technology, applied in the field of telecommunications, can solve the problems of undefined activation/release protocol, not being used, etc., and achieve the effect of simplifying installation and monitoring

Inactive Publication Date: 2004-01-14
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The G.709 standard also defines a one-byte TCM activation / release field (TCM ACT, TCM: Segmented Serial Connection Monitoring) in the frame management overhead, but does not define a protocol for activation / release, and this field until still not used

Method used

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  • Tandem connection activation/deactivation
  • Tandem connection activation/deactivation
  • Tandem connection activation/deactivation

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Experimental program
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Embodiment Construction

[0023] In order not to interrupt the transmission on an existing path, it is necessary to synchronize the configuration steps within the intermediate network elements in order to establish or withdraw a segmented serial connection on this path. The invention describes methods that allow automatic activation and release of segmented serial connections using only local knowledge within each network element. For releasing a segmented serial connection, information needs to be exchanged between the network elements terminating the segmented serial connection. The present invention thus provides for direct communication between terminating network elements of segmented serial connections.

[0024] Since no such communication is defined for SDH / SONET in G.707, the inventor proposes to replace this missing signaling with a reinterpreted 'Remote Failure Indication' (RDI), where the Remote fault indication. For OTH, the present invention proposes to use an additional 'Error Indicator...

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Abstract

A method for the automatic activation and deactivation of a tandem connection (2-6) is provided responsive to receiving an activation or deactivation request. Prior to activation, received transmission signals are monitored (M) for an existing tandem connection to avoid creation of overlapping tandem connections. Further, responsive to receiving a deactivation request, the tandem connection sink function (SK1) is deactivated and the existing tandem connection is monitored (M1) to detect when no tandem connection information is received anymore to automatically deactivate the tandem connection source function (SO1) as well. Direct signaling of a sink inactive identifier (RDI) takes also place between the tandem connection terminating network elements (2, 6) to inform the far end tandem connection terminating network element (6) of an automatic deactivation of the tandem connection sink function (SK1). Upon reception of the sink inactive identifier (RDI), the far end network element (6) deactivates its tandem connection source function (SO2).

Description

[0001] The present invention is based on priority application EP 02 360 171.9, to which reference is made. technical field [0002] The present invention relates to the field of telecommunications, and in particular to a method and a network unit for activating / deactivating tandem connection monitoring in a transmission network. Background technique [0003] A modern transmission network consists of a large number of interconnected network elements, such as terminal multiplexers, multiplexers / diffusers, cross-connectors and signal regenerators. The well-known Synchronous Digital Transport Network SDH or Synchronous Optical Network SONET (G.707 10 / 2000) and Optical Transport Network (OTNG.709 02 / 2001) are some examples. Such a network transmits slave end-user signals in the form of signal multiplexing. [0004] The connection between two physically connected network elements in the transmission network is called a section. Zones can be monitored for alarm and error status. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/14H04Q11/04
CPCH04J2203/0051H04J3/14H04J2203/0057
Inventor 马丁·胡克汉斯-乔格·加克尔
Owner ALCATEL LUCENT SAS