A number of efforts are underway to use optical networks to create high-speed end-to-end circuits. These circuits can be used for transfers of large files such as those generated by large-scale scientific applications. At the present time, gigabit and 10-gigabit Ethernet signals from end hosts are typically mapped onto metro-/wide-area SONET circuits using Ethernet-over-SONET (EoS) technologies...

A prototype software system that implements a methodology for the strategic planning of survivable interoffice networks is presented. The software system determines strategic locations and ring types for Synchronous Optical Network ring placement. Two types of survivable network architectures are considered-1 : 1 diverse protection and SONET self-healing rings. The software considers three type...

The edge-partitioning problem presented in this paper is motivated by a problem in the design of SONET telecommunication networks. In a SONET ring, customer sites are connected via a ring of fiber-optic cable, each one sending, receiving, and relaying messages through a device called an add–drop-multiplexer (ADM). A bandwidth request, or demand, is given for every pair of sites. Each SONET ring...

In high-speed wavelength-division-multiplexed synchronous optical network (SONET) ring networks, the terminal equipment costs associated with electronic multiplexing can be predominantly high. Placing a wavelength add–drop multiplexer (WADM) at each network node allows certain wavelengths to optically bypass the node without being electronically terminated. This approach can effectively reduce ...

We review the evolution of traffic grooming from SDH/SONET to evolutionary flexible-grid and elastic-rate technologies and summarize the relevant issues. Sliceable optical transponder is identified as a novel technology that could potentially impact the future grooming paradigm.

Regional and metropolitan networks are undergoing rapid transformations, propelled by shifting bandwidth and market paradigms. These evolutions have revealed some serious limitations with legacy SONET/SDH infrastructures and opened up many new avenues for the application of new, maturing optical technologies. This chapter presents a critical look at some of the major evolutions and challenges s...

SONET add-drop multiplexers (ADMs) are the dominant cost in SONET/WDM rings. They can potentially be reduced by optical bypass via wavelength adddrop multiplexers (WADMs) and trafflc grooming. While many works have been done o n the grooming of all-to-all uniform trafflc and one-to-all trafflc, the grooming of arbitrary t r a c have not been studied yet. In this paper we first proves the NP-har...

Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Abstract This document provides encapsula...