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Method and device for monitoring multiple paths of different uplink wavelengths through single PD

A wavelength and random algorithm technology, which is applied to the selection device, selection device, and multiplexing communication of multiplexing systems, and can solve problems such as increasing hardware costs.

Active Publication Date: 2021-06-04
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method needs to add multiple MCUs at the PD end, it also increases the hardware cost

Method used

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  • Method and device for monitoring multiple paths of different uplink wavelengths through single PD
  • Method and device for monitoring multiple paths of different uplink wavelengths through single PD
  • Method and device for monitoring multiple paths of different uplink wavelengths through single PD

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment provides a method for a single PD to monitor multiple different upstream wavelengths, which is applied to a WDM-PON system. The WDM-PON system includes an OLT and multiple ONUs with different wavelengths communicating with the OLT. Each ONU will have The uplink and downlink wavelengths communicate with the OLT. see figure 2 As shown, in actual application, the optical signals of each ONU are superimposed by an external wavelength division multiplexing multiplexer and then transmitted to the OLT; the OLT separates the superimposed optical signals of different wavelengths through the internal wavelength division multiplexing multiplexer , and transmit to the uplink optical module corresponding to each ONU. In this embodiment, the OLT is also provided with a PD for monitoring multiple channels of different upstream wavelengths. The method for monitoring multiple channels of different upstream wavelengths by a single PD specifically includes the following ...

Embodiment 2

[0071] Based on the same inventive concept, an embodiment of the present invention also provides a device for monitoring multiple different upstream wavelengths by a single PD based on the above method, including an OLT and multiple ONUs with different wavelengths communicating with the OLT.

[0072] Wherein, the ONU is provided with a time calculation module and a signal sending module. The time calculation module is used for: when the modulated signal is sent for the first time, determine the start sending time T1 according to a random algorithm, and calculate the next sending time T2; for subsequent sending, calculate the new next sending time T2. The signal sending module is configured to: when the sending time (T1 or T2) arrives, add T1 and T2 into the modulated signal for sending.

[0073] Moreover, a PD for monitoring multiple different uplink wavelengths is set in the OLT, and the PD includes a demodulation frequency learning synchronization module and a demodulation p...

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Abstract

The invention discloses a method and a device for monitoring multiple paths of different uplink wavelengths by a single PD, and relates to the technical field of WDM-PON (Wavelength Division Multiplexing-Passive Optical Network) access. The method comprises the following steps: when each ONU sends for the first time, determining sending start time T1 according to a random algorithm, calculating next sending time T2, and adding T1 and T2 into a modulation signal for sending; during subsequent sending, sending and calculating a new T2 according to respective T2 time; when a PD in the OLT receives a modulation signal sent by a certain ONU for the first time, learning synchronization of demodulation frequency is carried out, T1 and T2 are demodulated, and the time PDTime when the modulation signal arrives next time is calculated according to T1 and T2; and when the time of the PDTime arrives, the PD replaces the corresponding demodulation frequency for demodulation, and calculates a new PDTime. According to the invention, monitoring of multiple paths of different uplink wavelengths can be realized by using the single PD, and additional devices do not need to be added at a local side, so that the process difficulty and the hardware cost are reduced, and the actual application requirements are met.

Description

technical field [0001] The present invention relates to the field of WDM-PON (Wavelength Division Multiplexing-Passive Optical Network, wavelength division multiplexing passive optical network) access technology, specifically a method and device for monitoring multiple different uplink wavelengths by a single PD. Background technique [0002] With the advent of 5G technology, the demand for transmission bandwidth in communication networks has shown unprecedented growth, and dense wavelength division systems have been widely used in networks. Among them, wavelength division multiplexing passive optical network WDM-PON technology is the most commonly used technology. [0003] In WDM-PON applications, each ONU (Optical Network Unit, Optical Network Unit) will have two wavelengths uplink and downlink to communicate with the OLT, and the uplink and downlink wavelengths between the ONU and the OLT (Optical Line Terminal, Optical Line Terminal) are one by one. corresponding and ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04J14/02
CPCH04Q11/0067H04J14/0201H04Q2011/0083
Inventor 刘新峰方哲
Owner FENGHUO COMM SCI & TECH CO LTD