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Method and device for transmitting and receiving client signal in optical transport network

A client signal and optical transport network technology, applied in the field of optical transport network, can solve problems such as inability to provide line interfaces and inability to achieve optimal configuration of optical transport network bandwidth resources

Active Publication Date: 2012-12-12
HUAWEI TECH CO LTD
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  • Application Information

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Problems solved by technology

[0006] However, the current line interface of the electrical layer OTN is a fixed rate level, and it is impossible to provide a line interface with a suitable rate according to the actual traffic volume of customer services, so that the optimal allocation of bandwidth resources of the optical transport network cannot be achieved.

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  • Method and device for transmitting and receiving client signal in optical transport network
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  • Method and device for transmitting and receiving client signal in optical transport network

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] In the embodiment of the present invention, a variable-rate container structure is constructed on the OTN electrical layer, called OTU-N (Optical channel Transport Unit-N, optical channel transport unit-N), and the value N is a configurable positive integer. The OTU - The rate of N is configurable at a granularity of a preset base rate level, for example, the rate of the OTU-N is N times the base rate level. The rate of the OTU-N can be flexibly configured according to the traffic size of the client signal, which can be detected by the OTN equipment or configured by the management plane.

[0032] The value N is flexibly configured according to transmission requirements. Preferably, the value N is determined based on the traffic ...

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Abstract

The inventive embodiment provides a method and a device for transmitting and receiving a client signal in optical transport network, belonging to the field of optical transport network. The transmitting method comprises: mapping the received client signal to a container OTU-N with a variable rate, which is N times the preset reference rate grade, wherein N is a configurable positive integer according to requirement; dividing the container OTU-N with the variable rate into N photon channel transmission units OTUsub according to columns, the rate of each OTUsub being equal to the reference rate grade; modulating the N photon channel transmission units OTUsub to a one-channel or multi-channel optical carrier; and transmitting the one-channel or multi-channel optical carriers on the same optical fiber. The method provided by the invention is adaptive to the change in spectral bandwidth of an optical layer by mapping the client signal to the container OTU-N with the variable rate and by transmitting the OTU-N through the same optical fiber, thereby realizing optimized configuration of the bandwidth resources of the optical transport network.

Description

technical field [0001] The invention relates to the field of optical transport network, in particular to a method and device for transmitting and receiving client signals in the optical transport network. Background technique [0002] OTN (Optical transport network, optical transport network), as the core technology of the next-generation transport network, includes the technical specifications of the electrical layer and the optical layer, and has rich OAM (Operation Administration and Maintenance, operation, management and maintenance), powerful TCM (Tandem Connection Monitoring (tandem connection monitoring) capability and out-of-band FEC (Forward Error Correction, forward error correction) capability can realize flexible scheduling and management of large-capacity services. [0003] At the electrical processing layer, OTN technology defines a standard encapsulation structure, maps various customer services, and can manage and monitor customer signals. OTN frame structur...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04B10/08
CPCH04J3/00H04J3/1652H04J14/0298H04B10/25H04J3/1694H04B10/27H04B10/516
Inventor 苏伟吴秋游董立民
Owner HUAWEI TECH CO LTD
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