Performance of PON Dynamic Bandwidth Allocation Algorithm for Meeting xHaul Transport Requirements

Abstract

Passive optical networks (PONs) use dynamic bandwidth allocation (DBA) algorithms to assign upstream bandwidth for different types of traffic to transmission containers (T-CONTs) used by optical network units (ONUs). In this paper, we show that the performance of a PON DBA algorithm that incorporates a colorless grant can ensure that the average upstream delay and delay distribution of T-CONT frames fall within the latency requirements for different traffic types in an xHaul transport network. We evaluate the performance of two deployment scenarios for a 10-Gigabit-capable PON (XGS-PON) system using the OMNeT++ network simulator. The simulation results show that, when the delay distribution of frames is analyzed, more than 99% of fronthaul traffic at 80% load in both scenarios are below the 250 µs latency requirement. Overall, the results indicate that the latency requirements of fronthaul traffic can be met by over-allocating bandwidth to it relative to other types of traffic in the network.