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Erschienen in:
2009 | OriginalPaper | Buchkapitel
The Effects of Link and Node Capacity on Traffic Dynamics in Weighted Scale-Free Networks
verfasst von : M. B. Hu, R. Jiang, Y. H. Wu, Q. S. Wu
Erschienen in: Complex Sciences
Verlag: Springer Berlin Heidelberg
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The effect of link and node capacity on traffic dynamics are investigated in weighted scale-free networks by adopting a traffic routing model with local node strength information:
$P_{l \rightarrow i} = \frac{S_{i}^{\alpha}}{\sum_j S_{j}^{\alpha}}$
. The link bandwidth is controlled by:
B
ij
= max (
βw
ij
,1), and the capacity of nodes is controlled by: max (
γs
i
, 1). The phase transition from free flow to congestion is reproduced. The optimal routing strategy is sought out. When
β
increases from zero, the optimal strategy changes from preferring low-strength nodes to high-strength nodes. When
β
≈ 1.0, there will be two optimal routing strategies. When
β
is low, the system’s behavior is controlled by link bandwidth, while it is controlled by node capacity when
β
is high. Our work may be useful for the design of modern traffic systems and communication networks.