A network node and wave adding and adding node

Abstract

Provided in the embodiments of the present application are a network node and an up-and-down wave unit, used to reduce a cost of a coherent division multiplexing network system. The embodiments of the present application comprise: a receiver, a first up-and-down wave node, and a first centralized wave lock module; the first up-and-down wave node is connected to the first centralized wave lock module; the first up-and-down wave node comprises a first input port, a first wave-selection port, a first pass-through port, a first output port, and a first up-and-down wave port; the first up-and-down wave port and the first wave-selection port have a same filter window. The receiver comprises: a first tunable laser module, a 90 degree optical mixer Hybrid, and a first optical splitter; the first optical splitter is connected to the 90 degree Hybrid; the first tunable laser module, the first optical splitter, the first up-and-down wave node, and the first centralized wave lock module are connected successively; a light wave emitted by the first tunable laser module is sent to the first centralized wave lock module by means of the first wave-selection port so as to generate a first target light wave c which has a same wavelength as a second target optical signal.

Description

technical field [0001] The embodiment of the present application relates to the communication field, and in particular to a network node and a wave adding and adding node. Background technique [0002] Coherent optical communication technology can increase network capacity, and digital signal processing (English full name: Digital Signal Processing, abbreviation: DSP) in the transceiver provides more flexibility, so the development of coherent wavelength division multiplexing (English full name: Wavelength Division Multiplexing , referred to as: WDM) network is imminent. The important building blocks of a coherent WDM network include: each node add / drop unit and digital coherent transceiver. These two modules already have mature technologies and have been fully developed in the metropolitan core network and long-distance backbone network. However, some WDM networking scenarios, such as metro aggregation and access networks, are cost-sensitive scenarios, so a low-cost coher...

AI Technical Summary

Problems solved by technology

When configuring the add / drop wavelengths of each network node, in addition to configuring the add / drop units, the digital coherent transceivers also need to be tuned, which increases the complexity of network node configuration and leads to coherent wavelength division multiplexing network The operating and maintenance costs are high, and it is not suitable for cost-sensitive scenarios such as metro aggregation and access networks

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