Planning of Resilient OFDM-PON in Support of 5G Backhaul

Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) has been regarded as one of the promising solutions for 5G backhaul due to its excellence in spectral efficiency and transmission stability. However, the vulnerability of OFDM-PON to link failure cumbers its applicability in 5G backhaul, which is expected to offer enhanced network resilience. Although link duplication has evolved as a common practice for the protection of PON against link failure, the compromise between economical cost for backup links and QoS guarantee remains an open issue. In this paper, we focus on the network planning of resilient OFDM-PON and propose a novel backup mechanism to effectively mediate between network redundancy cost and performance degradation at both PHY and MAC layers.