US 8,948,205 B2 · Method and apparatus for mapping and de-mapping in an optical transport network

Abstract

The embodiments of the present invention disclose method and apparatus for mapping and de-mapping in an optical transport network, where the mapping method includes: constructing an Optical Channel Data Tributary Unit (ODTU) according to an amount M of time slots of a High Order Optical Channel Payload Unit (HO OPU) to be occupied by a Low Order Optical Channel Data Unit (LO ODU); mapping the LO ODU to a payload area of the ODTU in a M-byte granularity; encapsulating overhead information to the overhead area of the ODTU; and multiplexing the ODTU, which has been mapped the LO ODU and encapsulated with the overhead information, to the HO OPU, so as to provide a high-efficient and universal mode for mapping the LO ODU to the HO OPU.

Claims15

Dependent claims

A mapping method used in an Optical Transport Network (OTN), comprising:

constructing an Optical Channel Data Tributary Unit (ODTU) according to an integer value M larger than 1, wherein the integer value M equals the number of time slots of a High Order Optical Channel Payload Unit (HO OPU) that are to be occupied by data of a Low Order Optical Channel Data Unit (LO ODU) via the ODTU;
mapping the data of the LO ODU into a payload area of the ODTU by mapping the data of the LO ODU in units of M bytes, such that multiple units of M bytes are mapped into the payload area of the ODTU;
encapsulating overhead information to an overhead area of the ODTU;
and
multiplexing the ODTU, into which the data of the LO ODU has been mapped and to which the overhead information has been encapsulated, to the HO OPU.

2 more elements

Dependencies are inferred from the claim text.

Method and apparatus for mapping and de-mapping in an optical transport network

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Method and apparatus for mapping and de-mapping in an optical transport network

Life of this patent

Abstract

Claims15