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Loop network protection method and network appliance

A ring network and equipment technology, applied in the field of optical network communication, can solve problems such as service interruption and long switching time, and achieve the effect of reducing service interruption time

Inactive Publication Date: 2011-11-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0031] The purpose of the embodiments of the present invention is to provide a ring network switching method and equipment to solve the problem of long-term service interruption caused by too long switching time in the prior art

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  • Loop network protection method and network appliance
  • Loop network protection method and network appliance
  • Loop network protection method and network appliance

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Embodiment Construction

[0076] In the implementation process of the embodiment of the present invention, the inventor analyzes the process of protection switching in the prior art, such as ring switching, and when the working channel SF fails, the following conditions should be met in order to make the recovery time of a bidirectional service as short as possible:

[0077] (1) The responding end (the working channel does not have an SF end) should be bridged as soon as possible, and can be bridged when receiving a short-path bridged SF request;

[0078] (2) The initiating end (detecting the SF end of the working channel) switches as soon as possible, and can switch when SF is detected;

[0079] (3) Reduce the unnecessary service interruption time of the responding end (the working channel has no SF end), and the responding end should switch after the bridging at the initiator end and the service on the protection channel are stable.

[0080] Combine (1), (2) and (3), and combine image 3 Table 2 sho...

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PUM

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Abstract

The invention provides a ring network protection method and network equipment, which belong to the filed of optical communication. The method comprises the following steps: when a working channel of certain service is abnormal, after detecting an abnormal initiation end, sending a short path bridged request message and a long path bridged request message, and bridging service sent from the initiation end to a near-side protection channel of the service, and switching the service received by the initiation end from the working channel to the near-side protection channel of the service to receive; when a response end receives the short path bridged request message, after replying a short path bridged response message and a long path bridged response message to the initiation end and bridging the service sent from the response end to the near-side protection channel of the service to send, switching the service received by the response end from the working channel to the near-side protection channel of the service to receive. The invention also provides the corresponding network equipment. The ring network protection method and the network equipment reduce ring switching time and service interruption time.

Description

technical field [0001] The invention relates to the technical field of optical network communication, in particular to a method for realizing protection switching in an optical network. Background technique [0002] In an optical network, protection switching and service recovery are two kinds of service protection methods. Among them, the protection switching plays an important role in the optical network, especially in the optical transmission system, because of its advantages of reliability and short switching time. In the protection switching of all optical network systems, the multiplex section switching of SDH equipment is the most mature protection switching. This protection method uses the k1 and k2 overhead bytes in the multiplex section to transfer automatic protection switching APS The signaling of the protocol completes the protection of the multiplex section. Wherein, the formats of K1 and K2 bytes are defined as shown in Table 1. [0003] Table 1 SDH multipl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/08H04L1/22H04L29/06
CPCH04J3/085
Inventor 李振宇曾宇周迎亮郝丽宏
Owner HUAWEI TECH CO LTD