Method and device for sending and receiving otn overhead

Abstract

Provided are a method and device for transmitting and receiving an OTN overhead. The method comprises: performing physical layer encapsulation on a data message to be transmitted, and adding a type field during the physical layer encapsulation, so that different types of data messages can be time-division multiplexed in a physical layer channel of an OTN overhead, the type field being used for indicating the type of the data message to be transmitted; and transmitting the data message which has been subjected to physical layer encapsulation in the physical layer channel of the OTN overhead. The embodiments of the present invention can increase the use efficiency of a physical layer channel of an OTN overhead and realize the dynamic allocation for the physical layer channel, and can also expand the types of data messages.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and device for sending and receiving overhead of an optical transport network (Optical Transport Network, OTN). Background technique [0002] In the OTN overhead, 64 bytes are defined, some of which are reserved in the OTN standard and cannot be used. In the current processing scheme, generally a certain type of data message occupies one or more bytes in 64 bytes, and the one or more bytes occupied are called a physical layer channel. In each physical layer channel It is only used to transmit one kind of information, for example, the general communication channel (General Communication Channel, GCC) 0 is only used to transmit the GCC management information of GCC0, and the automatic protection switching (Automatic Protection Switching, APS) is used to transmit the APS protection switching information. It can be seen from the above applications that...

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Problems solved by technology

It can be seen from the above applications that no matter how much the effective data bandwidth is, it always occupies a fixed number of bytes in the OTN overhead, so when the effective data bandwidth is small, its usage efficiency is low; in addition, when a new type of In the case of data packets, how to transmit new types of data packets is also a problem; moreover, the physical layer channel cannot be dynamically released. When it is not started, the bandwidth of the physical layer has been fixed and cannot be used by others.

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