A novel dynamic bandwidth allocation algorithm with QoS support for EPON access networks

Abstract

Ethernet passive optical network (EPON) has been considered as an attractive solution to next-generation broadband access networks due to its low cost and high throughput. However, designing efficient bandwidth allocation algorithms is a critical issue in EPON. In this thesis, various dynamic bandwidth allocation (DBA) algorithms for EPON systems are first reviewed. A novel DBA algorithm, called per-slot DBA (PSDBA), is then presented to efficiently and fairly allocate bandwidth among different users. The PSDBA algorithm is based on the multi-point control protocol (MPCP) and allocates bandwidth on a per-slot basis. It is also combined with non-strict priority scheduling and priority queuing to support differentiated services in the design of an EPON system. Extensive simulation experiments are performed. Simulation results show that the PSDBA algorithm outperforms a well-known DBA algorithm using a per-frame bandwidth allocation strategy.