Sdn-based channel estimation for multiplexing between los mmwaves, nlos sub-6 ghz and fso

A system for providing small cell backhaul communication, comprising:

• a small cell backhaul network including a plurality of small cell network nodes;
• at least one transceiver at each of the plurality of small cell network nodes for establishing communication links with other small cell network nodes within the small cell backhaul network;
• a fast failover group table located at each of the plurality of small cell network nodes;
• a software defined network controller for controlling communication link configuration by the at least one transceiver between the other small cell network nodes of the small cell backhaul network, the software defined network controller calculating for each of the communications links within the small cell backhaul network a primary link and at least one back-up link, the software defined network controller storing the calculated primary link and at least one back-up link in the fast failover group table of each of the plurality of small cell network nodes;
• and
• wherein each of the plurality of small cell network nodes locally determines to establish the at least one back-up link responsive to a determination that the primary link is down and the stored at least one back-up link for an associated small cell network node.