Resilience in next generation access networks: Assessment of survivable TWDM-PONs

Abstract

In addressing the requirements of next-generation passive optical networks, the time and wavelength division multiplexed PON (TWDM-PON) has been selected as the next technology solution beyond 10 Gbps PONs. Due to the increased network reach and customer base, many of which are business customers, rapid fault detection and subsequent restoration of services are critical. Fault protection for conventional PONs has previously been extensively explored. Application of these existing schemes is however inappropriate for TWDM-PONs as an increased network reach and customer base necessitate highly sensitive monitoring modules for fiber/device fault detection. The existing use of upstream transmiss..