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Recently, Peer-to-Peer (P2P) based multi-party video conference systems have been widely deployed. However, those solutions suffer from high cost when multiple users simultaneously distribute video streams to receivers. Most existing systems only support up to a dozen of users at the same time. In this paper, we propose a novel approach to construct and manage a heterogeneous P2P network for scalable...
Cyber-Physical Networked Systems (CPNS) are systems that integrate a multitude of nodes that perform computations for the sake of interacting with, or controlling, a physical process. The network plays an important role in CPNS supporting the interactions among the distributed nodes that enable the collaborative work towards the application goals. Some systems, e.g., target tracking systems, require...
ZigBee/IEEE 802.15.4 beacon-enabled mode allows low duty-cycle operation with high energy saving in the wireless sensor network. However, low duty cycles introduce higher end-to-end delay in event propagation and generally lower reactivity of the network with respect to the actual sensing. In target tracking systems, both qualities should be satisfied, namely, low energy consumption while no target...
The recent rapid development of industrial Ethernet requires addressing the topic of network design from a new perspective. The design of industrial Ethernet networks must typically consider real-time constraints and robustness against network failures. In this paper, the topology design of industrial Ethernet networks problem is firstly modelled considering the requirements of industrial applications...
Real-time Ethernet emerges as the primary supporting technology for the next generation of industrial communications. As real-time performance is critical in many industrial applications, how to evaluate it in industrial Ethernet becomes vitally important. In this paper a mathematical model using Network Calculus is presented to calculate the upper bound of end-to-end delay in hybrid networks.
A novel optical buffer bases on cascaded DLOBs is proposed and experimentally demonstrated. This buffer can provide large variable delay range of 1-999 times of the basic delay unit and be dynamically reconfigurable within nanoseconds.
We demonstrate the single and dual wavelength signals delays via Brillouin slow light in the single mode fiber at the same time. Moreover, each wavelength delay of the signal can be also controlled by the other wavelength pump power. For single wavelength, the width of 100 ns pulse can be delayed from 0 ns to 40 ns by tuning the power of the pump while for dual wavelengths pump the delay time decrease...
Recent advances in wireless networking technologies, along with ubiquitous sensing and computing, have brought significant convenience for location service. The localization issue in wireless sensor networks under the non-adversarial scenario has already been well studied. However, most existing localization schemes cannot provide satisfied location service under the adversarial scenario. In this...
Because of the unbalanced construction, the conventional three-phase three-leg inverters produce huge amount of common-mode (CM) voltage. This paper proposes a novel sinusoidal pulse width modulation (SPWM) control strategy based on three-phase four-leg structure. This strategy is an improved method on the basis of the SPWM carrier phase-shifting control technology. In the new method, the state of...
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