Adaptive polling algorithm to provide subscriber and service differentiation in a Long-Reach EPON

作者：Merayo Noemi^*; Jimenez Tamara; Duran Ramon J; Fernandez Patricia; de Miguel Ignacio; Lorenzo Ruben M; Abril Evaristo J

来源：Photonic Network Communications, 2010, 19(3): 257-264.

DOI：10.1007/s11107-009-0230-x

• Long-Reach
• Passive optical network (PON)
• Dynamic bandwidth allocation (DBA)
• Service level agreement (SLA)
• Class of service (CoS)
• Ethernet

A novel interleaved polling algorithm for Long-Reach EPONs is proposed in order to simultaneously provide subscriber and class of service differentiation. It is demonstrated that the new polling algorithm applied to a typical 100 km Long-Reach EPON performs better than centralized methods, where bandwidth prediction is needed to overcome the higher round trip time in which ONUs cannot transmit. As polling methods in Long-Reach EPONs do not require prediction, they are much simpler and show less computational complexity than centralized schemes, avoiding the inaccuracy of bandwidth prediction. Simulation results show that the new algorithm increases the achieved throughput when compared to centralized algorithms with traffic prediction, obtaining a significant reduction of both mean packet delay and packet loss ratio for the highest priority service level profiles.

• 出版日期2010-6