Abstract
To bridge the gap between the current practice of setting up expensive,
dedicated, lightpath connections (i.e., static topologies), and the distant
future vision of inexpensive access to dynamically switched end-to-end lightpaths,
we propose a medium term solution in the form of edge-reconfigurable
optical networks (ERONs). An ERON is an overlay-control network
created by installing readily available MEMS optical switches, and implementing
a GMPLS control plane at sites interconnected by static lightpaths. The switches
and control software are deployed at the edge of the network and operated
by the organization-user (i.e., outside the network provider's control), hence
the term “edge-reconfigurable”. By providing dynamic, automated
control of end-to-end lightpaths, ERONs enable the sharing of expensive network
resources among multiple users and applications that require sporadic access
to these resources. We develop an algorithm for creating an ERON from an existing
topology of static lightpaths. We also present simulation results that quantify
the benefits of ERONs, in terms of the number of lightpaths that are needed
when compared to a static configuration of independent and dedicated circuits.
© 2009 IEEE
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