Routing selection optimization method and routing selection optimization device

Abstract

The invention provides a routing selection optimization method and a routing selection optimization device, the method comprises the following steps: according to a preset priority, sorting K available routings obtained according to services, taking the routing, in the K available routings, with the highest priority as a first reachable routing, and obtaining an output power of the first reachablerouting; when the output power of the first reachable routing is greater than or equal to a preset first threshold value, further calculating an optical signal noise ratio OSNR value of the first reachable routing; when the OSNR value of the first reachable routing is greater than or equal to a preset second threshold value, taking the first reachable routing as an optimal routing of the servicewavelength. In the method and the device provided by the invention, while selecting the optimal routing of the service wavelength, the output power and the OSNR value of the routing are considered comprehensively, thus, the selected optimal routing has lower error rate, and performance of the complete communication network is promoted.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for optimizing route selection. Background technique [0002] The routing and wavelength assignment (Routing and Wavelength Assignment, RWA) problem is one of the core problems in optimizing network performance. At present, the RWA problem is generally divided into a routing sub-problem and a wavelength allocation sub-problem to be solved separately. [0003] However, in the existing solutions to the RWA problem, the routing and wavelength allocation results only consider network performance such as network throughput, number of required wavelengths, number of optical fibers, and optical path blocking rate, without considering the output power of the optical path after the optical path is established. And optical signal to noise ratio (Optical Signal Noise Ratio, OSNR) index. [0004] In the long-distance transmission process of the Optical Transport N...

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Problems solved by technology

[0003] However, in the existing solutions to the RWA problem, the routing and wavelength allocation results only consider network performance such as network throughput, number of required wavelengths, number of optical fibers, and optical path blocking rate, without considering the output power of the optical path after the optical path is established. And optical signal to noise ratio (Optical Signal Noise Ratio, OSNR) index

[0004] In the long-distance transmission process of the Optical Transport Network (OTN), the output power of the optical channel and the OSNR will seriously affect the bit error rate of the communication system, so that the route obtained by the RWA algorithm is not optimal. Optimal routing affects the overall network performance of the communication system

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