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Bandwidth Allocation in Agile All-Photonic Networks
 

Student: Nahid Saberi, Ph.D. Student
Supervisor: Prof. Mark Coates

Abstract: The focus of the research is resource allocation techniques in WDM star networks. In the star networks the resource allocation is focused at a single point in the network (the central, optical switch), and hence needs a much simpler design compared to the other topologies. In such a network, assuming some buffering at the edge switches, dynamic time slot reservation can avoid contention issues, as arise for instance with burst-switching techniques, and still yield efficient utilization of the central switch in high-load scenarios.
We have implemented a scheduling algorithm for an optical TDM/WDM star network composed of a nonblocking central switch (e.g., a Batcher-Banyan optical switch) and a set of edge nodes, each capable of simultaneously transmitting (and receiving) at several different wavelengths. The scheduling algorithm aims at achieving low blocking probability for the assignments, minimizing the number of switching operations at the central switch, and minimizing the computation time.

[Full Description] [Paper (pdf format)]