This brief focuses on the problem of H∞ control for a class of networked control systems with time-varying delay in both forward and backward channels. Based on the average dwell-time method, a novel delay-compensation strategy is proposed by appropriately assigning the subsystem or designing the switching signals. Combined with this strategy, an improved predictive controller design approach i...

Clustering neighbouring nodes of an all-optical core network into medium-sized rings controlled by a master node allows two-way reservation-based control to aggregate bursts destined for other clusters in a lossless way with tolerable delay. The densely packed bursts can then be sent over static or switched light paths and be received in the destination cluster ring without the delay of end-to-...

Due to the enormous improvement of networking technologies and the advances in media encoding and compression techniques, IPTV becomes one of the fastest growing services in the Internet. When offered via wireless technologies (e.g., WiMAX), IPTV can pave the way for quad-play in next generation networks and ubiquitous delivery. IPTV subscribers expect the same or even better Quality of Experie...

The development of broadband transmission and ATM switching technologies opens up an opportunity for providing high bit-rate multipoint and multimedia services such as video conferencing. Also, wireless communication has the inherent advantage of multicast transmission and may be used for multipoint information services. We consider multicast packet switching for which an input may send the sam...

Real-time video demands a stringent delay and jitter requirement. A switch in the network needs to implement an effective scheduling algorithm to meet such a requirement. The Jitter-EDD (Earliest-Due-Date) scheme designed for packet switching networks is noted for its capability to control the end-to-end delay jitter to be within the delay variation in the last switching node of the path. It, h...

Scope and Purpose: To cope with the increasing internet traffic, it is necessary to improve the performance of routers. To accelerate the switching from input ports to output in the router partitioning of ports and dynamic queueing are proposed. Input and output ports are partitioned into two groups A/B and a/b respectively. The matching for the packet switching is performed between group pairs...

The new telecommunication networks scenario is characterised by a very rapid increase of the volume of traffic, and also very variable and unpredictable traffic demands. In this context, all-optical packet switching is emerging as the most promising technology for covering such new requirements. In this paper, we deal with the performance analysis of an optical packet switch with a feedback del...

The role of optical buffering in the development of all-optical cross-connects is discussed, followed by an analysis of fibre delay line implementations in optical buffers. It is shown that the traffic model plays an important part in the analyses of the systems, together with the traffic load, the use of internal buffer wavelengths, and the cross-connect architecture. Travelling buffers have s...

Optical burst switching (OBS) is a promising candidate for a more dynamic optical layer in the context of IP over WDM. Although buffering is not mandatory for the functionality of OBS, even simple FDL buffers can improve burst loss probability. In this paper, we first discuss principal buffer architectures and reservation schemes for fiber delay line (FDL) buffers. Then, we investigate key desi...

The probabilistic methods for power estimation in combinational circuits are classified in two categories according to the adopted gate-delay model. The zero and real gate-delay power estimation methods. Under zero delay model, assuming spatiotemporal independence among the circuit signals, the switching activity, E(sw), of a circuit node, x, is given by ) 1 ( 2 2 ) ( 1 1 0 1 x x x x p p p p sw...