Enhanced Class-of-Service Oriented Packet Scheduling Scheme for EPON Access Networks

• DOI: 10.1093/ietcom/e91-b.10.3334
• Publication Date: 2008-10-10T14:50:10Z
• Authors: I. HAN; H.-S. PARK; M.-S. HAN
• Keywords: 0203 mechanical engineering; 02 engineering and technology

A fast class-of-service oriented packet scheduling (FCOPS) has a service fairness problem since a credit pool for a service class is initialized at the beginning of a transmission cycle whose starting moment is fixed at a specific ONU. To remedy the service unfairness of FCOPS, we suggest an enhanced class-of-service oriented packet scheduling (ECOPS) that uses a new initialization cycle whose starting moment is fairly distributed to each ONU. Also, ECOPS generates a colorless grant to utilize the resource wastage, when traffic is light and the total sum of grants of an ONU is less than a minimum size. Using simulation, we validate ECOPS as superior to FCOPS in the mean delay and the service fairness.