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arXiv · 0711.1655

Congestion diffusion and decongestion strategy in networked traffic

Zhi-Xi Wu·Wen-Xu Wang·Kai-Hau Yeung
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Abstract

We study the information traffic in Barabási-Albert scale free networks wherein each node has finite queue length to store the packets. It is found that in the case of shortest path routing strategy the networks undergo a first order phase transition i.e., from a free flow state to full congestion sate, with the increasing of the packet generation rate. We also incorporate random effect (namely random selection of a neighbor to deliver packets) as well as a control method (namely the packet-dropping strategy of the congested nodes after some delay time $T$) into the routing protocol to test the traffic capacity of the heterogeneous networks. It is shown that there exists optimal value of $T$ for the networks to achieve the best handling ability, and the presence of appropriate random effect also attributes to the performance of the networks.

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Zhi-Xi Wu, Wen-Xu Wang, Kai-Hau Yeung. 2007-11-11. Congestion diffusion and decongestion strategy in networked traffic. https://doi.org/10.1088/1367-2630%2F10%2F2%2F023025

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