Circuit Emulation Services over EPON Based on Preemptive Priority Medium Access Control

Circuit Emulation Services (CES) technology has emerged as an option to mitigate traditional TDM circuits supporting legacy applications across managed packet networks. Since Ethernet Passive Optical Network (EPON) is becoming a major technology for pervasive access. The primary benefits of CES over EPON (CESoEPON) are the low cost and simplicity of deployment to support all types of legacy TDM applications across EPONs. Thus, the QoS-guarantee for highly delay-sensitive services on EPONs could be enhanced. This paper investigates a preemptive priority transmission technique that works on MAC and PHY layer of EPONs. The proposed novel scheme effectively reduces the frame queuing delay as well as jitter, so as to enhance precise time synchronization in EPONs. Through simulation experiments, we show that the proposed method achieves superior and precise QoS control compared to existing non-preemptive methods. Finally, we present a general conclusion of the paper.