ROADM (Reconfigurable Optical Add/Drop Multiplex) switching node device and method having traffic grooming function

Abstract

The invention provides an ROADM (Reconfigurable Optical Add / Drop Multiplex) switching node device and method having a traffic grooming function. The device comprises a wavelength switching colorless directionless ROADM unit and a sub-wavelength traffic grooming unit. The method comprises the following steps: (1) broadcasting wavelength traffic to all wavelength selection switches by an optical divider; (2) selecting a wavelength channel carrying the traffic by the wavelength selection switches; and (3) if the wavelength traffic is direct forwarding traffic, transmitting the wavelength traffic to a corresponding output port through a specified wavelength selection switch, and allowing other wavelength selection switches to discard the wavelength traffic; and if the wavelength traffic is traffic requiring traffic grooming, transmitting the wavelength traffic to a traffic grooming sub-module through the specified wavelength selection switch for performing wavelength traffic grooming, and allowing other wavelength selection switches to discard the wavelength traffic. Through adoption of the ROADM switching node device and method, electric domain traffic grooming and optical domain wavelength switching functions are integrated, and wavelength-level traffic grooming and flexible scheduling are realized on an electric layer for the uplink and downlink of user side traffic and forwarding traffic.

Description

technical field [0001] The present invention relates to a switching node device and method, in particular to a ROADM switching node device and method with service grooming function. Background technique [0002] In recent years, traditional telecommunication services have continued to decline, while new telecommunication services represented by cloud computing, Internet of Things (IPTV), and the Internet of Things have marked the most significant development trend of the telecommunication industry. Quality of service, security, and reliability all put forward higher requirements, and the electrical-layer organization network is far from meeting the huge bandwidth requirements of users for the network, so the transmission network develops from the electrical-layer network to the optical-layer network. Optical communication, especially wavelength division multiplexing (Wavelength Division Multiplex), can meet the requirements of capacity, distance, and transmission quality to ...

AI Technical Summary

Problems solved by technology

However, this structure only supports wavelength-level service cross-connection on the optical layer, and does not have functions such as sub-wavelength service grooming.

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