Two Phase Bandwidth Allocation Mechanism with Adaptive Prediction for Differentiated Services on EPONs

• Main Authors: Zun-Long Huang, 黃樽湰
• Other Authors: 黃依賢
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/26580819650333880505

碩士 === 元智大學 === 資訊工程學系 === 97 === This study proposes a novel Two Phase Bandwidth Allocation (TPBA) mechanism incorporated with a prediction-based scheme in Ethernet passive optical networks (EPONs). Two phase dynamic bandwidth allocation mechanisms are designed in the proposed TPBA. In the first phase, the TPBA can resolve the idle time problem in traditional DBA mechanism. Furthermore, the TPBA can predict and allocate the excess bandwidth fairly and improve overall system in the next phase. The traffic characteristic in differential traffic class is also considered in the proposed prediction scheme to provide more accurate prediction. Simulation results using OPNET show that the proposed TPBA mechanism with adaptive prediction scheme performs better than well-known DBA methodologies in terms of wasted bandwidth, throughput, end-to-end delay and queue length.