Abstract
Traffic dynamics on multi-layer networks are of great importance to alleviate traffic congestion of real networks. In this work, we focus on information transport in multi-layer networks comprised of two coupled subnetworks. We investigate the relationship between correlated inter-layer couplings and resource allocation strategies on the traffic dynamics of multi-layer networks. Simulation results show that assortative coupling (AC) structure can improve the multi-layer networks traffic capacity more better than disassortative coupling (DC) and random coupling (RC) with degree-based (DE) efficient resources allocation strategy, and DC structure is better in enhancing the traffic capacity with the simplest average resources allocation (SA) strategy. Our work may shed some light on the traffic dynamics on multi-layer networks.
Highlights
In recent years, the complex network theory has become an important method for describing the structure and dynamics of traffic networks
When the shortest path routing (SPR) strategy is adopted, it can be seen that when Pr = −1, the critical generation rate Rc = 11 is the largest value, that is, with the disassortative coupling (DC) mode, the traffic capacity could be most greatly enhanced
When Pr = −1, it is in assortative coupling (AC) coupling mode with Rc = 3, which is at the minimum value
Summary
The complex network theory has become an important method for describing the structure and dynamics of traffic networks. The research work in this field focuses on the analysis and optimization of traffic capacity of multi-layer networks to reduce network congestion. These overwhelming traffic demands have brought a heavy burden on network infrastructures [12]. We focus on the resource allocation strategy with different inter-layer couplings to enhance the traffic capacity of two-layer network. The coupling correlation between the upper and lower layers can be optimized to improve traffic efficiency of the two-layer network Both the reasonable resource allocation strategies and coupling methods of two-layer network can increase the traffic capacity to avoid network congestions. It is confirmed that the coupling characteristics between two-layer network have an impact on the traffic capacity in different resource allocation strategies
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