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Wavelength control method for ultra-dense wavelength division multiplexing coherent light access system

A wavelength division multiplexing and access system technology, which is applied in the wavelength control field of ultra-dense wavelength division multiplexing coherent optical access systems, and can solve the problems of inability to reuse optical splitters, inconvenient opening and maintenance, etc.

Pending Publication Date: 2021-03-19
SHENZHEN C-DATA TECH CO LTD
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Problems solved by technology

In this solution, the wavelength of each ONU (optical network) is fixed (determined by the port of AWG2), which is inconvenient to open and maintain. At the same time, this solution cannot reuse the optical splitters that have been widely deployed by operators.

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  • Wavelength control method for ultra-dense wavelength division multiplexing coherent light access system
  • Wavelength control method for ultra-dense wavelength division multiplexing coherent light access system
  • Wavelength control method for ultra-dense wavelength division multiplexing coherent light access system

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specific Embodiment approach

[0048] The invention mainly controls the wavelength tuning of the ONU (choose 1 from 32), the optical switch (open or close) and the registration of the ONU. refer to Figure 4 , the present invention provides a method for controlling the wavelength of an ultra-dense wavelength division multiplexing coherent optical access system, adding a coherent multi-wavelength MAC control sublayer (CMWMC sublayer) between the MAC CLIENT sublayer and the OAM sublayer of the Ethernet protocol stack ) to coordinate the access of multiple ONUs. The CMWMC sublayer needs to maintain a wavelength allocation table on the OLT side, and a wavelength status table on the ONU side, and then the OAM frames downstream through the OLT include GATE frames, REGISTER frames, and TUNE frames, and the upstream OAM frames of the ONU include REGISTER_REQ frames and REGISTER_ACK Frame, combined with the timer can complete ONU registration, wavelength allocation and other work without manual intervention; combin...

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Abstract

The invention discloses a wavelength control method for an ultra-dense wavelength division multiplexing coherent optical access system, and the method comprises the steps: maintaining a wavelength distribution table at an OLT side, maintaining a wavelength state table at an ONU side, and completing the ONU registration and wavelength distribution without manual intervention through an OLT downlinkGATE frame, an REGISTER frame and a TUNE frame, and an ONU uplink REGISTER_REQ frame and an REGISTER_ACK frame. According to the invention, the aged wavelength allocation table can be cleaned in timeby combining with the timeout mechanism of the timer, and rapid ONU registration and wavelength allocation can be realized by combining with the non-volatile memories of the OLT and the ONU.

Description

technical field [0001] The present invention relates to the field of optical access network technology, in particular to a wavelength control method for an ultra-dense wavelength division multiplexing coherent optical access system. Background technique [0002] Traditional WDM-PON technologies such as figure 1 shown. figure 1 The Remote Node (remote node) uses AWG, and there is only one wavelength on each branch. In this solution, the wavelength of each ONU (optical network) is fixed (determined by the port of AWG2), which is inconvenient to open and maintain. At the same time, this solution cannot reuse the optical splitters that have been widely deployed by operators. For this reason, the applicant disclosed on the same day of this patent application figure 2 An ultra-dense wavelength division multiplexing system, the system can greatly increase the optical power budget due to the introduction of coherent technology, so that it can reuse the ODN technical facilities (...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04L1/16
CPCH04J14/0234H04J14/0263H04L1/1607H04L1/1678
Inventor 胡保民唐子坚李浩赵华
Owner SHENZHEN C-DATA TECH CO LTD
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