Dynamic Path Reconfiguration Among Hybrid FSO/RF Nodes

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Executive Summary

To increase the availability of Free Space Optics Network (FSO) networks, the optical link is provided with a redundant backup network, such as RF, to form a hybrid network. The immediate switching from FSO to RF in hybrid networks leads to suboptimal utilization of FSO network. In this work, a network of hybrid nodes, where each node is equipped with multiple transceivers and has multiple associations with other nodes of the network is proposed. Alternate FSO paths are established and prioritized through these multiple associations via intermediate nodes. On the loss of an active FSO link, path reconfiguration takes place, and the FSO path next in priority is utilized.

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