Volume 79, Number 1, July 2007
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||08 June 2007|
The effect of bandwidth in scale-free network traffic
School of Engineering Science, University of Science and Technology of China - Hefei 230026, PRC
2 Nonlinear Science Center and Department of Modern Physics, University of Science and Technology of China - Hefei 230026, PRC
3 Department of Mathematics and Statistics, Curtin University of Technology - Perth WA6845, Australia
Accepted: 22 May 2007
This paper models the effects of bandwidth on the traffic capacity of scale-free networks. We investigate the decrease of the system traffic capacity and the variation of the optimal local routing coefficient , induced by the restriction of bandwidth. For low bandwidth, the same optimal value of emerges for two different cases of node capacity, namely constant and , where ki denotes the degree of the i-th node. By investigating the number of packets at each node in the free-flow state, we provide analytical explanations for the optimal value of . Average packet travelling time, distribution of packet travelling time, and average visits per node divided by the node connectivity are also studied.
PACS: 45.70.Vn – Granular models of complex systems; traffic flow / 89.75.Fb – Structures and organization in complex systems / 89.20.-a – Interdisciplinary applications of physics
© Europhysics Letters Association, 2007
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