Method and apparatus for transmitting and receiving client signal in optical transport network
AssigneeHuawei Technologies Co., Ltd.
InventorsWei Su, Qiuyou Wu, Limin Dong
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Abstract
Embodiments of the present invention provide a method and an apparatus for transmitting and receiving a client signal in an optical transport network. In the transmission method, a received client signal is mapped into a variable-rate container OTU-N, wherein a rate of the OTU-N is N times as high as a preset reference rate; and then, the variable-rate container OTU-N is split into N optical sub-channel transport units OTUsubs by column, where a rate of each OTUsub equals to the reference rate; next, the N optical sub-channel transport units OTUsubs are modulated onto one or more optical carriers; at last, the one or more optical carriers is transmitted through a fiber.
Claims22
A method for transmitting a client signal in an optical transport network, the method comprising:
- mapping, by a transmitter, a received client signal into an Optical channel Transport Unit-N (OTU-N), wherein a rate of the OTU-N is N times a reference rate, and the value N is a positive integer;
- splitting, by the transmitter, the OTU-N into N optical sub-channel transport units (OTUsubs) by column, wherein a rate of each OTUsub equals the reference rate;
- and
- sending, by the transmitter, the N OTUsubs to a fiber.
A transmission apparatus for use in an optical transport network, the transmission apparatus comprising:
- a computing hardware;
- and
- a non-transitory computer-readable storage medium including computer-executable instructions which, when executed by the computing hardware, cause the transmission apparatus to:
- map a received client signal into an Optical channel Transport Unit-N (OTU-N), wherein a rate of the OTU-N is N times a reference rate, and the value N is a positive integer,
- split the OTU-N into N optical sub-channel transport units (OTUsubs) by column, wherein a rate of each OTUsub equals the reference rate, and
- send the N OTUsubs to a fiber.
A method for receiving a client signal in an optical transport network, the method comprising:
- receiving, by a receiver, N optical sub-channel transport units (OTUsubs), wherein a rate of each OTUsub equals a reference rate;
- multiplexing, by the receiver, the N OTUsubs into one Optical channel Transport Unit-N (OTU-N) by column, wherein a rate of the OTU-N is N times the reference rate, and the value N is a positive integer, wherein a payload area of the OTU-N carries the client signal;
- and
- demapping, by the receiver, the client signal from the OTU-N.
A receiving apparatus for use in an optical transport network, the receiving apparatus comprising:
- a computing hardware;
- and
- a non-transitory computer-readable storage medium including computer-executable instructions which, when executed by the computing hardware, cause the receiving apparatus to:
- receive N optical sub-channel transport units (OTUsubs), wherein a rate of each OTUsub equals a reference rate,
- multiplex the N OTUsubs into one Optical channel Transport Unit-N(OTU-N) by column, wherein a rate of the OTU-N is N times the reference rate, and the value N is a positive integer, and
- demap a client signal from the OTU-N, wherein the client signal is mapped into the payload area of the OTU-N.
Dependencies are inferred from the claim text.