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A data mapping method and an apparatus for an optical transport network

A technology of data mapping and optical transport network, which is applied in the field of communication, can solve problems such as unproposed solutions, and achieve the effect of improving the efficiency of optical fiber spectrum utilization

Inactive Publication Date: 2014-02-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The demand for ultra-high-speed WDM systems continues to increase based on bandwidth requirements, thereby introducing the demand for Flexible Grid technology. However, many issues such as how to effectively plan and manage spectrum, and compatibility with existing systems, etc. waiting for solution
[0005] For the problem of how to effectively carry out spectrum planning and management after the introduction of flexible grid technology in related technologies, for example, no longer limited to a fixed rate of over 100G, no effective solution has been proposed yet

Method used

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  • A data mapping method and an apparatus for an optical transport network
  • A data mapping method and an apparatus for an optical transport network
  • A data mapping method and an apparatus for an optical transport network

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Embodiment 1

[0050] Different from selecting the next fixed bit rate for Ethernet and Optical Transport Network (OTN), this embodiment provides a data mapping method and device, which can expand the architecture of the optical transport network. Provide a flexible super (Super) rate optical channel data unit (Super Optical Channel Data Unit, referred to as ODUS). This embodiment does not adopt the method of selecting a fixed bit rate for the next-generation optical transport network, because selecting a flexible bit rate allows operators and equipment vendors to make good use of advanced hardware capabilities. For example, in optical transport networks In terms of hardware, through the software programmable modulator, the modulation scheme (Modulation Scheme), whether it is the modulation depth (Modulation Depth) and the number of optical carriers (Optical Carriers), can be flexibly selected, so as to be able to provide a specific optical transmission distance , Optimize the bit rate and sp...

Embodiment 2

[0058] This embodiment provides a data mapping method and device for a super 100G optical transport network. Below, two ODU4 (two ODU0, ODU1, ODU2, ODU2e, ODU3, ODUflex) or packet services are loaded. An ODU4 has a total rate of 400 Gbit / s) and a 200 Gbit / s packet service mapping advanced low-level ODUS as an example. The data mapping method of this embodiment is described. The bit rate of the ODUS is 400 Gbit / s. Figure 5 It is a schematic diagram of the ODUS-OTUS-OChS mapping and multiplexing processing flow according to the second embodiment of the present invention, such as Figure 5 As shown, the processing flow includes the following steps:

[0059] Step S501, the packet service (such as 200 Gbit / s) is encapsulated or directly mapped to the low-order super optical channel data unit ODUS(L) through GFP.

[0060] Step S502: Map the low-order optical channel data unit (ODUk, k=0, 1, 2, 2e, 3, flex) or 100 Gbit / s packet service to ODU4.

[0061] Special note: If the bandwidth requi...

Embodiment 3

[0066] When the available continuous spectrum is not enough to support an OChS signal, ODUS is first inversely multiplexed into two or more ODUSi containers. The overhead byte of ODUSi must provide additional information to allow the bit stream of ODUS to be calibrated and reassembled at the receiving end; considering that the 100Gbit / s system has been deployed, the modularity of the inverse multiplexing mode can be carried out according to the 100Gbit / s granularity Incremental, that is, ODUSi is n times the 100Gbit / s rate, and n is greater than or equal to 1. The simplest method is to require all ODUSi to use the same rate level. This method is compatible with the current 50GHz fixed grid and 100G system design requirements. For example, an ODUS with a bit rate of 1Tbit / s can be multiplexed into 10 ODUSis inversely, and the bit rate of each ODUSi is 100Gbit / s, and each OChSi is supported through a fixed grid of 50GHz.

[0067] Image 6 It is a schematic diagram of the mapping a...

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Abstract

The invention discloses a data mapping method and an apparatus for an optical transport network. The method comprises the following steps: mapping of packet service on super optical channel data units (ODUS) and mapping of the ODUS in super optical channel transport units (OTUS) are carried out; and mapping of OTUS in optical channels (OChS) is further carried out, wherein the rates of the ODUS, the OTUS, and the OChS are all N times 100 gigabit per second. The magnitude of a branch sequence of the ODUS is 100 gigabit per second. N represents a positive integer greater than or equal to 2. Through the data mapping method and the apparatus for the optical transport network of the invention, a problem of how to effectively carry out frequency spectrum program and management after the introduction of the flexible grid technique in the related techniques is solved, and service providers are enabled to deploy optical transport systems of more than 100G with higher flexibility degree, and transport systems of more than 100G are no longer limited to a selected fixed rate. The utilization efficiency of fiber frequency spectrums and the flexibility of the systems are raised.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a data mapping method and device for an optical transport network. Background technique [0002] The development trend of optical transmission technology presents higher single-channel speed (for example, single-channel 400G / 1T transmission), higher spectral efficiency and higher-order modulation formats. Therefore, continuing to increase the speed is still the clearest and most important direction for the development of optical transmission . High-speed transmission faces many limitations. There are two main aspects: On the one hand, optical transmission technology is developing towards high-spectral efficiency convergent transmission and high-speed service interface transmission. If the spectrum efficiency cannot continue to improve, the low-speed convergence to high-speed transmission is of little significance. However, because there may still be high-speed Ethernet inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04Q11/00
CPCH04J3/1652H04L5/00H04J14/0256
Inventor 付锡华张新灵
Owner ZTE CORP
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