Method and system for load balancing traffic grooming based on ip over Quasi-CWDM network

Abstract

The invention relates to a load balancing traffic grooming method based on IP over Quasi-CWDM network, comprising inputting network topology, service traffic set and empty route between node pairs, selecting one node pair in the service traffic set and establishing the node When requesting traffic between them, delete the virtual link in the IP layer of the network whose corresponding optical path does not have enough remaining capacity; find the virtual link route with the smallest number of hops at the IP layer, and determine whether each virtual link on the route can pass traffic. The traffic grooming method satisfies the service request. If the judgment result is yes, the traffic grooming strategy is used to meet the service request. If the judgment result is no, the wave plane-based strategy is used to establish an optical path to meet the service request. The present invention can reduce the maximum number of wavelengths used in the network while maximizing the spectrum efficiency in the network, and can balance the traffic load of the link in the network and reduce the variance of the number of wavelengths used in the link.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a load balancing traffic grooming method and system based on an IP over Quasi-CWDM network. Background technique [0002] To meet the ever-increasing traffic demands, a great deal of research has focused on developing new optical transmission technologies to improve spectral efficiency. Quasi-Coarse Wavelength Division Multiplexing (Quasi-CWDM) network architecture is a cost-effective and spectrum-efficient network architecture with a frequency spacing between traditional Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM). time, such as 200GHz or 400GHz. By adaptively adopting different modulation formats, the Quasi-CWDM architecture still maintains flexibility in adapting to the transmission rate and transmission distance of the Super Optical Channel. [0003] Reference [1] studies the traffic grooming problem of IP over...

AI Technical Summary

Problems solved by technology

Although all optical paths always select the corresponding highest-level modulation format to maximize spectral efficiency, a large number of service requests will converge on a small number of network links, resulting in network link congestion

In order to balance the traffic load between network links, light paths can be established based on dynamic routing algorithms, but this may choose long-distance routes to establish light paths, therefore, light paths may use lower-level modulation, resulting in the spectrum of Quasi-CWDM networks Reduced efficiency

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