Method of determining communication path in communication network and equipment

Abstract

The embodiment of the invention discloses a method of determining a communication path in a communication network and equipment. The method comprises steps: spectrum planes are divided according to the number N of available spectrum slices in a communication spectrum and the number n of spectrum slices requested by service; according to conditions of idle spectrum slices in the communication network, a weight of each path section in each spectrum plane is determined; an available path with the minimal weight sum in each spectrum plane is determined to form an available path set; and the available path with the minimal idle spectrum slice number is selected in the available path set to serve as the optimal path in the communication network. On the premise of not influencing or interrupting original service, the path and spectrum resources which minimally influence the network are selected, the blocking rate of a subsequent routing request is reduced, and consistency and the utilization ratio of a single spectrum slice are improved.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and equipment for determining a communication path in a communication network. Background technique [0002] With the development of communication technology, optical fiber has become the carrier of most information transmission, and the development of optical network is of great significance to the development of communication field. In the traditional WDM wavelength division multiplexing system, the spectrum allocation unit is based on the spectrum as the granularity, and a "one size fits all" spectrum allocation method is adopted for all services, which greatly wastes spectrum resources. Due to its advantages in making full use of optical fiber bandwidth resources, efficient information transmission and exchange, and intelligent and flexible network control, spectrum flexible optical networks are currently being extensively researched and develop...

AI Technical Summary

Problems solved by technology

On the one hand, the spectrum flexible optical network will generate a large number of spectrum fragments after running for a period of time. If it is not organized and controlled, it will inevitably affect the spectrum utilization rate and increase the blocking rate of the network.

On the other hand, most of the current routing and spectrum algorithms consider the routing problem and the spectrum allocation problem separately. The spectrum usage of the entire network is ignored in the routing, and the available paths in some networks are ignored in the spectrum allocation.

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