Salvatore Rotolo

Integrated optic tunable add-drop filters for WDM ring networks

This paper deals with two types of thermo-optically tunable add-drop filters realized by means of different technologies: fiber-matched low-pressure chemical vapor deposited (LPCVD)-grown SiO/sub 2/ waveguides and plasma-enhanced chemical vapor deposition (PECVD)-grown high-refractive-index-contrast SiON waveguides. Design and technology aspects are outlined. The device characterizations, drawn from laboratory and field trial measurements, are reported. The description focuses on the device applications in a system context. In particular, the usefulness of the components as the basic elements of an optical add-drop multiplexer node, suitable for a ring network, is shown. The key component aspects are presented as strictly related to system requirements and issues.

Design and performance evaluation of cross layered MAC and clustering solutions for wireless ad hoc networks

In Wireless Mobile Ad Hoc Networks (MANETs), dynamic and adaptive virtual infrastructures obtained by distributed clustering protocols may be useful to support more reliable communications, efficient network management and high resource utilization. The mutual support between MAC, clustering schemes and other protocol layers would need cross-layering protocol architectures. In this paper we propose one solution for the mutual support of distributed MAC and clustering schemes in MANETs. We design and analyze a distributed and adaptive MAC protocol, named the Differentiated Distributed Coordination Function (DDCF), implementing adaptive and differentiated channel accesses reflecting the node roles assigned by the proposed and investigated Availability Clustering (AC) scheme. Extensive simulation results shown the stability and effectiveness of the mutually supported clustering and MAC protocols, under various scenarios.

The “MOON” Light on TMN and OAM Concepts

General aspects of optical network management by means of TMN and OAM principles are addressed. The implementation of a managed field trial network (MOONET) is described, providing a demonstration of the applicability of these concepts to real optical environments.