Enhancing traffic capacity of scale free networks by changing queuing strategy

In this paper, we propose a new queuing strategy, which called multi-channel strategy, to improve traffic capacity. The multi-channel strategy is proposed according to the degree of the node. Compared with the previous strategy, single-channel strategy, in which each node has only one waiting queue so that packets can only transmit according to the order of packet queuing per unit time, the multi-channel strategy adjusts the number of waiting queue that each node has, that is, the number of waiting queue of each node is set according to the maximum amount of packets, the degree, that each node can handle per unit time. The pros and cons of the strategies can be compared by two indicators, one is traffic capacity improving, other one is traffic load. Lots of experimental simulations are conducted. In terms of improve traffic capacity, the multi-channel strategy is about 170% times that of the single-channel strategy. In terms of traffic load, the multi-channel strategy is more evenly distributed than the single-channel strategy. According to the experimental results, the multi-channel strategy is superior to the single-channel strategy. • Introducing the network model, traffic model and routing strategy in detail. • Applying two routing strategies in the network to show the superiority of the newly proposed strategy. • The newly proposed queuing strategy is introduced in detail. • The influence of queuing strategy on the traffic capacity of scale-free network is studied.