High Utilization and Hybrid Granting algorithm for EPON

In recent years, numerous studies have been attempted to solve problems of efficient bandwidth utilization and supporting QoS(Quality of Service) of EPON(Ethernet Passive Optical Network) system. This paper examines advanced scheduling algorithm which improves bandwidth utilization and supports QoS for different service classes of EPON system. This algorithm improves bandwidth utilization by diminishing or removing idle time of upstream channel scheduling using characteristics of fixed EF(Expedited Forwarding) cycle and also minimizes the packet delay and delay jitter of EF service class by splitting EF sub-cycle and AF sub-cycle. We conduct detailed simulation experiments using OPNET to evaluate the performance and validate the effectiveness of the proposed algorithm.