A Novel Prediction-Based DWBA Algorithm for NG-EPON Based C-RAN Fronthaul

Mobile fronthaul networks can benefit from TWDM-PON systems, such as NG-EPON, by employing an efficient DWBA scheme to fulfill CPRI requirements. This paper introduces a prediction-based DWBA algorithm to meet the bandwidth and delay requirements of the CPRI traffic regardless of the used line bit rate. The central idea is to provide for each ONU multiple time slots in one or more wavelengths. Moreover, a prediction method is employed to determine the number of time slots required for each ONU in future cycles. To the best of our knowledge, this is the first NG-EPON's DWBA algorithm focused in C-RAN architectures. Numerical results show that the proposed strategy decreases the number of active wavelengths, while improves time slot utilization and throughput rate without violating the fronthaul delay requirements, when compared with the state-of-the-art algorithms.