Showing papers by "Franco Callegati published in 1999"
TL;DR: Some important design issues in optical buffering and control function are addressed which are expected to have significant effects on router performance and are introduced in this article.
Abstract: The rapid increase of Internet traffic is pushing the deployment of WDM technology in the next-generation high-speed Internet backbone. Routers in the backbone could still be the potential bottleneck. In this article we consider some design issues of high-throughput optical routers which combine the advantages of WDM with the new optical switching technology. We first introduce a proposed Internet architecture based on the optical burst switching mechanism. Some important design issues in optical buffering and control function are addressed which are expected to have significant effects on router performance. Numerical results of a simulation study are also presented along with discussions.
85 citations
TL;DR: This article presents a new proposal for TCP-IP backbone implementation based on optical packet switching technology that merges the flexibility in resource management of packet switching with the high capacity offered by full optical technology.
Abstract: This article presents a new proposal for TCP-IP backbone implementation based on optical packet switching technology. The proposed network architecture merges the flexibility in resource management of packet switching with the high capacity offered by full optical technology.
78 citations
TL;DR: It is demonstrated that the concept under bursty, both time-slotted and asynchronous traffic conditions, can lead to a sizable reduction in buffer depth requirements compared to conventional solutions.
Abstract: We describe a new methodology for analyzing optical buffers with nonuniform distribution of the delay lines, the nondegenerate buffers. Coupled with an intelligent scheduling algorithm, it features improved system performance leading to more efficient and larger optical buffers. We demonstrate that the concept under bursty, both time-slotted and asynchronous traffic conditions, can lead to a sizable reduction in buffer depth requirements compared to conventional solutions.
74 citations
TL;DR: An all optical packet switching network is considered to provide transparent transport of information and results shown that time transparency can be reached within suitable network design.
Abstract: In this paper an all optical packet switching network is considered to provide transparent transport of information. To this end the evaluation of the end-to-end packet delay is performed by means of analytical tools. Bounds are proposed for the maximum packet delay and calculated by means of a simple additive formula that can be used for approximate end-to-end delay evaluation. Packetization and multiplexing delay at the access interface and queuing delay inside the nodes are considered as contributions to the whole packet delay. The obtained results shown that time transparency can be reached within suitable network design.
4 citations
TL;DR: The application of the Optical Transparent Packet network concept, as developed in the framework of the ACTS KEOPS project, in the evolving Information and Communication Network Technology is presented where users are IP traffic sources.
Abstract: The application of the Optical Transparent Packet (OTP) network concept, as developed in the framework of the ACTS KEOPS project, in the evolving Information and Communication Network Technology is presented where users are IP traffic sources. In particular the OTP network is supposed to operate as an interconnection facility for high capacity backbone routers and to provide the high switching capability needed for border routers at Network Access Points. The network architecture is described and performance evaluation is carried on at network access and on end-to-end basis. The investigation of algorithms for managing packet flows with different quality of service requirements is also developed as a key issue for the future network scenarios.
2 citations