Client side clock transmission method based on optical carrier remodulation in optical transmission network

A technology of optical transport network and optical carrier, applied in the field of optical communication, can solve problems such as reducing transmission efficiency, achieve the effects of improving accuracy, improving performance, and saving bit overhead

Inactive Publication Date: 2013-09-04
WUHAN POST & TELECOMM RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GMP is a method of encapsulating client-side services to ODUk. This method does not introduce large jitter and drift during the mapping process, but introduces additional overhead in GMP to transmit clock signals, reducing transmission efficiency.

Method used

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  • Client side clock transmission method based on optical carrier remodulation in optical transmission network
  • Client side clock transmission method based on optical carrier remodulation in optical transmission network
  • Client side clock transmission method based on optical carrier remodulation in optical transmission network

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Embodiment Construction

[0016] In order to make the object, technical solution, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0017] The present invention provides a client-side clock transmission method based on optical carrier remodulation in an optical transport network (OTN). The method fully utilizes optical spectrum resources to transmit client-side clock signals through optical carrier remodulation.

[0018] figure 2 It is a flow chart of the present invention implementing a client-side clock transmission method based on optical carrier remodulation, including:

[0019] Step 20, at the sending end of the system, the client signal is mapped into the OTN frame and loaded onto the optical carrier through amplitude modulation, and then enters a phase modulator (PM). The client signal clock sending device uses the phase modulator to re-modulate the optical carrier to gene...

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PUM

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Abstract

The invention provides a client side clock transmission method based on an optical carrier remodulation in an optical transmission network (OTN). On the transmitting end of a system, a client signal is loaded onto an optical carrier by amplitude modulation after being mapped into an OTN frame; then, the client signal subsequently enters a phase modulator (PM); a client signal clock transmitting device re-modulates the optical carrier by the phase modulator to generate a clock signal in a differential quadrature phase shift keying (DQPSK) format; then the clock signal enters a transmission link device to be transmitted; an optical signal is transmitted after being amplified by the link device; on a receiving end, the client signal is respectively received by a DQPSK demodulator and an OTN sub-wavelength cross processor by an optical splitter; and the clock is demodulated by the DQPSK demodulator.

Description

technical field [0001] The present invention relates to optical communication technology, in particular to a client-side clock transmission method based on optical carrier remodulation. Background technique [0002] With the advent of the Internet age, people's demand for information is increasing day by day. Due to the advantages of large bandwidth resources and low manufacturing costs, optical communication technology makes the Optical Transport Network (OTN) the basis of the next generation broadband communication network, and as an important supporting platform for information transmission technology, it will play a very important role in the future information society. important role. The emergence of OTN effectively solves the problems of small scheduling granularity, limited scheduling capacity, and imperfect management functions of traditional Synchronous Digital Hierarchy (SDH) and Wavelength Division Multiplexing (WDM) hybrid networks. In order to ensure the norm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04B10/25
Inventor 忻向军胡善亭张丽佳刘博张琦王拥军薛道均
Owner WUHAN POST & TELECOMM RES INST CO LTD
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