In this paper, we make an introduction to the security management in the next generation wireless mobile networks, including the access security mechanisms in the circuited-switched domain, packet-switched domain and emerging IP multimedia subsystem domain. Several research challenges are identified, including security architecture with network heterogeneity, energy-security tradeoffs and mobil...

In this paper, the switched generalized neural networks with mixed time-varying delays are proposed. Based on the strictly complete property of the matrices system, a switching rule which depends on the state of the network is designed. By employing a novel Lyapunov-Krasovskii functional, a delaydependent criterion is achieved in terms of Linear matrix inequalities (LMIs) which guarantees the e...

The Gemini interconnect is a dual technology (optical and electrical) interconnection network designed for use in tightly-coupled multicomputer systems. It consists of a circuit-switched optical data path in parallel with a packet-switched electrical control/data path. Here, we present quantitative measurements of optical data path operation from the physical implementation, as well as a discre...

In this paper we provide conditions for the stability of discrete time switched linear systems. We accomplish this by calculating the mean and covariance of the set of matrices obtained by using all possible switching sequences. The theory of switched linear systems has received considerable attention in the systems theory literature in the last two decades. However, for discrete time switched ...

Switched LANs are become more widely used because they can provide a higher bandwidth than LANs based on shared media. Examples of packet switched LANs include HIPPI, and switched FDDI and Ethernet. A number of studies have evaluated the performance of HIPPI networks, making simplifying assumptions about both the network and the tra c load. In this paper we present the results of a simulation s...

The traditional circuit-switched telecommunication network and the packet-switched data network are converging to a single packet-switched network. One important application of the converged network is telephony communications, also referred to as VoIP (Voice over IP). Call signaling protocols, such as H.323, SIP and MGCP, have been developed to support VoIP communications. To enable devices us...

We analyze limited wavelength translation in all-optical, wavelength division multiplexed (WDM) wraparound mesh networks, where upto W wavelengths, each of which can carry one circuit, are multiplexed onto a network link. All-optical wavelength translators with a limited translation range permit an incoming wavelength to be switched only to a small subset of the outgoing wavelengths. Although m...

Photonic networks are probably the most appropriate solution to meet growing bandwidth requirements in the present as well as in the future Internet. The very high bandwidth of optical fibers can be exploited to some extent by multiplexing the data either in the wavelength, in the time or in the code domain. However, new telecommunication applications require a dynamic, high-capacity optical ne...

For the delay may degrade the performance of networked control systems, networked control systems based on 100 M switched Ethernet are proposed in this paper. According to the working principle of Ethernet switch, the formulas of the upper bound delay of the single-level switched Ethernet and the multiple-level switched Ethernet are deduced by the timing diagram method, and the values of the up...

In the recent years, there is a strong interest of using switched Ethernet in factory automation. The switched Ethernet offers many attractive features such as large throughput, traffic isolation and full-duplex links. However, although using full-duplex switched Ethernet can limit the collisions to each port, the real-time features may be affected due to the collisions on an output port.This p...