Dynamic bandwidth allocation for QoS over ethernet passive optical network

Abstract

Ethernet-based passive optical network (EPON) technology is being considered as a promising solution for next-generation broadband access network. It must have the property of high efficiency, low cost, and support quality of service (QoS). A major feature for this new architecture is the use of a shared transmission media between all connected optical network unit (ONU). Hence, medium access control (MAC) arbitration mechanisms are essential for the successful implementation of EPON. In this thesis, we propose the several dynamic bandwidth allocation (DBA) algorithms that improve the network``s performance and support IP-based multimedia applications with quality of service requirement. In addition, we introduce analytic models of proposed algorithms and prove the system based on our algorithm to be asymptotically stable. Simulation results show the proposed bandwidth algorithms provide high bandwidth efficiency and low queueing delay of ONU in EPON. Simulation results also show ONU have lower packet delay and jitter for high priority traffics than other conventional allocation algorithms by the proposed dynamic bandwidth allocation algorithms.