Priority queueing scheduling techniques for QoS management in Ethernet passive optical networks.

摘要

With the vast availability of Ethernet in Local Area Networks (LAN) deployed globally and connecting LANs to Metropolitan Area Networks (MAN) and Wide Area Networks (WAN) via the current transport technologies (i.e., Synchronous Optical Network (SONET) in Americas and Synchronous Digital Hierarchy (SDH) in the rest of the world), there exists a need to resolve bandwidth gap between access networks and transport networks. Ethernet Passive Optical Network is one of the potential solutions offering to solve the bottleneck issue of access networks and adaptability of carrying Ethernet frames from subscribers to service providers. This study reviews Ethernet Passive Optical Networks (EPON) and then proposes a Priority Queueing (PQ) Algorithm in order to offer differentiated service and Quality of Service (QoS) in EPON.; The scope of this study aims to encompass in detail some of the most prominent features involved in the priority scheduling in Ethernet passive optical networks (EPONs). The main items presented in this study include a review of the current developments in the access networks, a detailed review of the passive optical networks (PONs, and analysis of scheduling in EPON. In addition, the simulation results are presented to verify and validate the proposed scheme. Special attention is also given to the delay and bandwidth requirements of the service disciplines.; "No problem can stand the assault of sustained thinking."---VOLTAIRE