This paper studies the problems of One-to-All and All-to-All Communication
in optical networks. In such networks the vast bandwidth available is utili
zed through wavelength division multiplexing: a single physical optical lin
k can carry several logical signals, provided that they are transmitted on
different wavelengths. In this paper we consider both single-hop and multi-
hop optical networks. In single-hop networks the information, once transmit
ted as light, reaches its destination without being converted to electronic
form in between, thus reaching high-speed communication. In multihop netwo
rks a packet may have to be routed through a few intermediate nodes before
reaching its final destination. In both models we give efficient One-to-Air
and All-to-All Communication algorithms, in terms of time and number of wa
velengths. We consider both networks with arbitrary topologies and particul
ar networks of practical interest. Several of our algorithms exhibit optima
l performances.(C) 2000 Elsevier Science B.V. All rights reserved.