Route search and wavelength allocation method in optical network and device thereof

摘要

The present invention provides a method and device for routing and wavelength assignment in an optical network. The method comprises: a topology step in which a topology network of the optical network is obtained; a route calculation step in which at least one route in the topology network is calculated, a first node and a last node of the route being predetermined, and the at least one route being part of all routes from the first node to the last node; and a wavelength assignment determination step in which for each node on the route, it is determined whether link attribute information of the node meets a predetermined constraint condition, if the predetermined constraint condition is met, the route is selected as a working route, and the method ends; if the predetermined constraint condition is not met, the method returns to the route calculation step.

主权项

1. A method for routing and wavelength assignment in an optical network comprising:
a topology step, executed by a device for routing and wavelength assignment in the optical network, in which a topology network of the optical network is obtained; a route calculation step, executed by the device for routing and wavelength assignment in the optical network, in which only one route in the topology network is calculated by using a route calculation algorithm, a first node and a last node of the route being predetermined, and the one route being one of all routes from the first node to the last node; and a wavelength assignment determination step following the calculation of the one route in the route calculation step, executed by the device for routing and wavelength assignment in the optical network, in which for each node on the route, it is determined whether link attribute information of the node meets a predetermined constraint condition that is for determining whether the route meets a wavelength assignment determination condition, when the predetermined constraint condition is met, the route is selected as a working route and a wavelength assignment is performed for the route, and no route other than the one route from the first node to the last node is calculated if a protection route is not further required; when the predetermined constraint condition is not met, returns to the route calculation step to calculate a next route from the first node to the last node; wherein, after each route that meets the predetermined constraint condition is calculated in the rout calculation step, the wavelength assignment determination step is performed for the route, instead of performing the wavelength assignment at one time after a plurality of routes are calculated.