Focusing on the RWA problem in optical transmission network

we proposed a RWA optimization algorithm based on ant colony algorithm framework.The way of choosing a request from requests zone is introduced

which would improve optimization ability of the algorithm.In addition

the way of updating pheromone and searching routes in ACO algorithm are also improved.This method can effectively reduce the network traffic congestion.Finally

we conduct a simulation to demonstrate the proposed method in a grid network and a province electric power communication network.