Traffic dynamics on layered complex networks

• DOI: 10.1016/j.physa.2011.02.002
• Publication Date: 2011-03-02T21:26:27Z
• Authors: Yue Zhuo; Yunfeng Peng; Chang Liu; Yingkai Liu; Keping Long
• Keywords: 11. Sustainability; 0103 physical sciences; 01 natural sciences

Abstract To minimize traffic congestion, understanding how traffic dynamics depend on network structure is necessary. Many real-world complex systems can be described as multilayer structures. In this paper, we introduce the idea of layers to establish a traffic model of two-layer complex networks. By comparing different two-layer complex networks based on random and scale-free networks, we find that the physical layer is much more important to the network capacity of two-layer complex networks than the logical layer. Two-layer complex networks with a homogeneous physical topology are found to be more tolerant to congestion. Moreover, simulation results show that the heterogeneity of logical and physical topologies makes the packet-delivery process of two-layer networks more efficient in the free-flow state, without the occurrence of traffic congestion.