Statistical and Deterministic Delay Guarantee for Industrial PON: A Network Calculus Approach

In industrial passive optical network (PON), different types of traffic flows have distinct delay requirements for uplink transmission. To meet different delay demands, flexible dynamic bandwidth allocation (DBA) can be implemented by the optical line terminal (OLT). In this paper, we propose a statistical and deterministic delay guarantee method based on network calculus to ensure differentiated upstream delay guarantees for the time-division multiplexing PON (TDM-PON). Specifically, we propose a heuristic algorithm based on deterministic network calculus (DNC) to provide strict delay bound guarantees for deterministic traffic flows. Further, we balance and guarantee statistical delay overflow boundaries by stochastic network calculus (SNC) and a greedy strategy for stochastic flows. Simulation results show the effectiveness of the proposed methods.