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Method for Avoiding Service Damage Caused by Multiplex Section Switching Cancellation

A multiplexing section and business technology, applied in multiplexing communication, time division multiplexing system, electrical components, etc., can solve problems such as error code business, damage, insufficient warm-up time of electronic components, etc., to avoid damage, achieve simple effects

Inactive Publication Date: 2011-11-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the multiplex section switching is canceled immediately at this time, these electronic components will be in an unstable state due to insufficient warm-up time, and there will be damage to services such as bit errors

Method used

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  • Method for Avoiding Service Damage Caused by Multiplex Section Switching Cancellation
  • Method for Avoiding Service Damage Caused by Multiplex Section Switching Cancellation
  • Method for Avoiding Service Damage Caused by Multiplex Section Switching Cancellation

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Embodiment Construction

[0017] The main idea of ​​the present invention is to use the '100' reserved in the low three bits of K2 byte G.841 in the SDH frame structure as a signaling to transmit the insertion and removal action information of the upstream optical processing unit to the downstream optical processing unit, and cooperate to complete Multiplex section protection switching prevents damage to services caused by cancellation of multiplex section switching. Refer to attached figure 1 , the present invention comprises the following steps:

[0018] Step A, after the optical processing unit of any node in the multiplex section protection group is unplugged and powered on and restarted, the lower three bits of the K2 byte sent to the downstream optical processing unit are changed to '100', and the lower three bits of K2 are inserted into ' The 100' action is canceled after a period of time;

[0019] Step B, if the downstream optical processing unit detects that the lower three bits of the recei...

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Abstract

The invention discloses a method for avoiding service damage caused by revocation of multiplexing section switching, and solves the problem that the multiplexing section switching is immediately cancelled when the optical processing unit is unplugged, plugged in, powered on and re-operating, which will damage the service. Use the '100' reserved in the lower three bits of the K2 byte in the SDH frame structure in Recommendation G.841 as signaling to transmit the plug-in action information of the upstream optical processing unit to the downstream optical processing unit, and cooperate to complete the protection switching of the multiplex section , to avoid the damage to the service caused by the cancellation of the multiplex section switching. The present invention is very simple to implement and does not need to add extra cost. It can also be extended to the case of plugging and unplugging of other processing units participating in the protection switching of the multiplex section.

Description

technical field [0001] The invention relates to the field of optical communication Synchronous Digital Hierarchy (SDH), in particular to a method for avoiding service damage caused by revocation of multiplexing section switching. technical background [0002] Recommendations G.841 and G.842 put forward by the ITU-T of the International Telecommunications Union stipulate algorithms and protocols for the multiplex section protection switching of SDH network equipment. Recommendation G.841 specifies signal failure (SF) as one of the conditions to trigger multiplex section protection switching. The causes of signal failure (SF) include LOS, LOF, MS-AIS, B2_EXC alarms, etc. However, it is suggested that the impact of these alarms on MSP protection switching is not further discussed. For example, considering the LOS alarm, it may be caused by a fiber break, or it may be caused by the optical processing unit being unplugged or the laser being turned off. The impact of LOS on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/08
Inventor 卿立军罗亚军
Owner ZTE CORP
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