Applied Mechanics and Materials Vols. 198-199

Abstract: The emergence of wireless packet-switched networks such as Universal Mobile Telecommunications System (UMTS), and wireless local area networks (WLANs) can provide voice, data, and video services for users. In this paper, we propose a network selection scheme in the wireless heterogeneous networks based on the traffic differentiation, conversational class, interactive class, streaming class, and background class. Simulation results demonstrate that the proposed network scheme can decide the optimal network to handoff according to the traffic class.

Abstract: In this paper, the cascading failures in a class of bipartite coupled map lattices are investigated. We found that for a network with given heterogeneity, international attack is much easier to trigger cascading failures than random attack. Furthermore, not only the mean node degree but also the largest eigenvalues of the network are found to relate to the size of cascading failures in the network. Therefore, this work might shed some light on the control of cascading failures in such structure of the network.