Method to enhance traffic capacity for two-layer complex networks

The study of traffic dynamics on multilayered networks is a hot issue, where the network topology is composed of two layers of subnetworks, such as wired-wireless networks and peer-to-peer networks. Virtual links on the logical layer can be changed or constructed easily, and therefore the topological structure of the upper logical layer can be efficiently constructed by a link removal strategy. In this paper, edges linking to nodes with large betweenness will be removed. The structure of the upper-layer network can be optimized freely based on our method. Simulation results show that for both shortest path routing strategy and efficient routing strategy, the traffic capacity of two-layer networks is significantly improved. In addition, the average transmission time of packets and the average path length are also investigated in this paper.