Method and apparatus for sharing protection of grouped light path
A technology of shared protection and channel protection, which is applied to the selection device, selection device, wavelength division multiplexing system, etc. of multiplexing systems. It can solve the problems of many components and high initial cost, and achieve reduced complexity and wavelength utilization efficiency. high effect
Active Publication Date: 2009-01-21
HUAWEI TECH CO LTD
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Problems solved by technology
[0020] The problem to be solved by the present invention is to provide a method and device for shared protection of grouped optical channels to solve the defects in the prior art that there are many blocking devices and the initial cost is too high
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[0080] The best embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0081] The present invention utilizes a WSS (Wavelength Selective Switching, wavelength selective switching) device to realize the sharing protection function of the packet optical channel. There are many forms of WSS implementation principles, but they all have the following functions, that is, different wavelength components in the input white light signal can be independently output from one of the multiple output ports, such as Figure 6 shown. Therefore, the output port of the WSS can be directly used as the drop port of a certain wavelength channel, or as the drop port of the wavelength group signal of the current site, and the output signal is processed by the DMUX board of the OADM to complete the drop of a single wavelength. Of course, the WSS can also be used as a multiplexer to complete the combination of multiple signals, and differe...
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A method, equipment and system for sharing protection of grouped optical channels, in which, takes the network node as the source node, the middle node and / or the host node and divides the influenced optical wavelength channels into a source optical channel set, a host optical channel set and a middle node optical channel set; then separates the source optical channel set from the protecting channel of the protecting fiber selectively to be converted from the working fiber to the protecting fiber to be transmitted, separates the host optical channel set from the channel of the protecting channel selectively to end at the host node; passes through the channel set of the middle node channel set to the next node. Correspondingly, this invention also provides a multi-grouped optical channel share protection devices and a system thereof. Only one pair of multi direction wavelength select device is needed to realize the shared protection of the entire optical wavelength channels of one node, it is not necessary that one pair of wavelength channel is set with one independent wavelength protection rotating loop unit, the cost and the complexity do not relate with the optical wavelength protecting channel shared protection rotating loop request.
Description
technical field [0001] The invention relates to wavelength division multiplexing technology, in particular to a method and device for sharing and protecting packet optical channels in a wavelength division multiplexing system. Background technique [0002] With the development of optical device technology and WDM (Wavelength Division Multiplexing, wavelength division multiplexing) technology, the communication capacity that can be carried by a single optical fiber has reached Tbps. Therefore, the failure of optical fiber lines or equipment failures in the underlying optical network often affects a large number of services, and improving network survivability has increasingly become a research hotspot for operators and equipment suppliers. [0003] Network survivability refers to the ability of the network to maintain an acceptable level of service quality during the period of network failure and equipment failure. The main technical indicators that characterize the network ...
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IPC IPC(8): H04B10/00H04J14/02H04Q11/00H04B10/032
CPCH04J14/0212H04J14/0205H04J14/0291H04J14/0283H04J14/0213H04J14/0204H04J14/0206H04B10/032H04J14/0219H04J14/0295
Inventor 李从奇
Owner HUAWEI TECH CO LTD