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Cloud radio access network (C-RAN) is a persuasive solution to the burst capacity in future 5G mobile system and it can tackle the tidal effect in mobile networks for better resource utilization. We propose a remote radio head (RRH) protection scheme to assure the availability of the RRHs. A protection layer is proposed to support re-configurable protection of the RRHs, with good scalability.
We propose a mobile fronthaul architecture to handle the tidal effect for dynamic provisioning, and also protect the main baseband units, using injection locking of Fabry-Perot laser diodes. Downstream transmissions at 2.5 Gbit/s to 4 Gbit/s over 20-km have been experimentally demonstrated over the proposed architecture.
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