Coupling Internet protocol (IP) routers with wavelength-selective optical crossconnects makes it possible to support existing Internet infrastructur in a wavelength-division multiplexing optical network. Because optical wavelength routing is transparent to IP, very high throughput and low delay can be achieved when packets are made to bypass the IP forwarding process by being switched directly ...

The specifications and performance of RAMP, a Reliable Adaptive Multicast Protocol, are presented. Initially described in IETF RFC 1458 [1], RAMP has been enhanced for use over an all-optical, circuit-switched, gigabit network under our ARPA-sponsored Testbed for Optical NEtworking (TBONE) project. RAMP uses immediate, receiver-initiated, NAK-based error notification combined with originator-ba...

Network on Chip (NoC) is proposed as a promising technology to address the communication challenges in deep sub-micron era. NoC brings network-based communication into the on-chip environment and tackles the problems like long wire complexities, bandwidth scaling and so on. After more than a decade's evolution and development, there are many NoC architectures and solutions available. Neverthele...

| Developments in telecommunications technology have outpaced progress in teletraac methods and practices. As a result, the planning and dimensioning of even the latest information-age services is, by default, commonly done on the basis of classical teletraac methods developed for circuit switched voice networks. In this paper, we will discuss recent traac measurement studies which have demonst...

This memo describes the experiences of a project team at Cray Research, Inc., in implementing support for circuit-switched T3 services. While the issues discussed may not be directly relevant to the research problems of the Internet, they may be interesting to a number of researchers and implementers. Developers at Cray Research, Inc. were presented with an opportunity to use a circuit-switched...

A system simulator for performance evaluation of adaptive antennas in UMTS FDD networks has been developed. The simulator is flexible, it uses realistic channel and system assumptions, and for a given scenario provides the maximum network capacity. The antenna types included in the simulator are switched lobe, phased array and adaptive array as well as conventional fixed sector antenna. Analyse...

Call admission control is a key element for providing quality of service (QoS) in mobile wireless networks. Traditional admission control schemes only address call-level QoS guarantee because of the underlying circuit-based network architecture. In contrast, emerging wireless technologies such as 3G and 4G tend to be packet-switched rather than circuit-switched because the packet-based architec...

Coupling Internet protocol (IP) routers with wavelengthselective optical crossconnects makes it possible to extend the existing Internet infrastructure to a wavelength-division–multiplexing optical network. Because optical wavelength routing is transparent to IP, one can achieve very high throughput and low delay when packets are made to bypass the IP forwarding process by being switched direct...

This paper provides one of the first approaches to the design of decentralized observer-based outputfeedback controllers for linear plants where the controllers, sensors and actuators are connected via a shared communication network subject to time-varying transmission intervals and delays. Due to the communication medium being shared, it is impossible to transmit all control commands and measu...

The Network Calculus (NC) [5] is an established theory for determining bounds on message delays and for dimensioning buffers in the design of networks for embedded systems. It is supported by academic and industrial tool sets and has been used, among many other applications, in the design and certification of the Airbus A380 AFDX backbone [1, 3, 4]. However, while the theory of NC is generally ...