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Protection method for WDM optical network loop based on resource and taking regard of protection duration control

A technology of protection time and protection circle, applied in the field of communication, can solve the problems of helplessness in the protection time of RP circle method, long transmission time of fault signaling, and long protection time, so as to improve the utilization rate of protection resources, reduce the protection time, and protect the efficiency. high effect

Active Publication Date: 2013-12-11
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

[0005] However, in terms of protection speed, since the RP circle method allows the protection resources on the link to be reused by multiple RP circles, when a link fails, it is necessary to send fault signaling around the faulty RP circle to notify each link The nodes at both ends perform protection switching, and the protection time is relatively long
In particular, the number of hops is relatively large, that is, there are many links on the circle and the scale of the RP circle is relatively large. When a fault occurs, the transmission time of the fault signaling is relatively long.
Moreover, due to the lack of consideration of the protection time factor in the configuration selection of the protection circle, after each fault occurs, the network needs to re-determine the coupling of protection resources, thus making the traditional RP circle method less effective in controlling the protection time. helpless

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  • Protection method for WDM optical network loop based on resource and taking regard of protection duration control
  • Protection method for WDM optical network loop based on resource and taking regard of protection duration control
  • Protection method for WDM optical network loop based on resource and taking regard of protection duration control

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[0025] The advantages and features of the invention and the method of carrying out the invention will be better understood by referring to the following detailed description of the exemplary non-limiting embodiments and the accompanying drawings. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Moreover, these examples are provided so that this disclosure will be thorough and complete. And to fully convey the concept of the present invention to those skilled in the art, the present invention will be defined only by the appended claims. Throughout the description, the same reference numerals designate shared parts.

[0026] figure 1 A block diagram of the resource-based circle protection method is shown. It mainly includes processing in three states: preconfigured state, normal working state and fault state.

[0027] The pre-configured state refers to the state of the network before p...

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Abstract

The invention relates to the communication field. The embodiment of the invention discloses a protection method of a WDM optical network ring, which is based on resources and considers protecting time control. The method mainly comprises the processing procedures under three states of preconfigured state, normal working state and fault state. The proposal also provides a heuristic ring search configuration method and a protection switch process matched with the configuration method.

Description

technical field [0001] The invention relates to the communication field, in particular to the protection for link failure in WDM optical network. Background technique [0002] With the rapid development of optical transmission technology, the single-channel transmission rate and the number of single-fiber multiplexing channels in the wavelength division multiplexing (WDM) network continue to increase, resulting in a sharp expansion of network capacity. At the same time, once a fault occurs in the network, it will have a serious impact on the entire social life. Therefore, it is of great significance to ensure the reliability of the optical network. [0003] P-ring protection is a protection method in WDM network, which combines the advantages of ring network protection and mesh network protection and restoration. P-ring protection realizes fast protection in the lattice network through the ring channel preset by idle resources, and at the same time allows the working chann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04B1/74H04B10/275
Inventor 罗沛黄善国李彬郭秉礼黄浩天顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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