In this paper, two different node architectures for a high-speed packet-switched ring LAN based on the optical time-division multiplexing technique are proposed. Due to the incorporated low-speed packet headers the presented ring can be viewed as an optically (bit rate) transparent network. In both cases, the node can be implemented by using the current opto-electronic technology. Moreover, acc...

Much effort has been involved in packet-level error control and delay jitter concealment for Internet audio applications. A packet-based time-scale modification scheme for speech signals is developed to provide adaptive delay concealment at the receiver for an Internet voice session in this work. The adaptive playout algorithm strives to minimize packet droppings for late-arrival packets and pr...

In this paper, we propose a distributed contention resolution scheme to reduce blocking probability in optical burst-switching networks. The scheme takes priority, propagation delay from the ingress router, and the burst-size into account to resolve contention, and guarantees that at least one of the bursts succeeds when contention occurs. We use a control packet to delay transmission of the co...

This paper presents a new fast switching hybrid frequency synthesizer with wide locking range. The hybrid synthesizer is based on the tanlock loop with no delay block (NDTL) and is capable of integer as well as fractional frequency division. The system maintains the in-lock state following the division process using an efficient adaptation mechanism. The fast switching and acquisition as well a...

The performance of a real-time scheduling algorithm for Asynchronous Time Sharing based switching nodes is presented. Three classes of tra c sources are considered to load the switching nodes: real-time video sources, for which the maximum end-to-end delay S I is guaranteed for all the cells; real-time voice sources, for which the maximum end-to-end delay S II is guaranteed with a maximumof % c...

A zero-voltage transition (ZVT) soft-switching inverter for an induction motor drive is developed. The proposed soft-switchng inverter is formed from the traditional pulse-wi dth modulated (PWM) inverter by simply augmenting with auxiliary resonant circuits, and the soft switching is acheved through applying PWM switching control signals with suitable delays for the main and auxiliary switches....

A White-cell-based binary optical true-time-delay device has two parts: the controller, or switching engine, and the delay elements. Here we discuss in detail the design of both glass blocks and lens trains as delay elements. Glass blocks can be used in our design for delays ranging from one to a few hundred picoseconds. Lens trains are suitable for longer delays. We also analyze the loss assoc...

In this paper we present a model to study the end-to-end delay performance of a satellite-ATM network. We describe a satellite-ATM network architecture. The architecture presents a trade-off between the on-board switching/processing features and the complexity of the satellite communication systems. The end-to-end delay of a connection passing through a satellite constellation consists of the t...

In this paper we describe the implementation of a network providing advanced services such as a premium service that aims at providing low loss, low delay, and low delay jitter and an olympic service that allows for a service differentiation in terms of delay within three additional classes. Our implementation of this network is based on the Differentiated Services Architecture, which is the mo...