The Design of Dynamic Bandwidth Allocation Mechanisms on GPON

• Main Authors: Yung-Tsang Su, 蘇泳蒼
• Other Authors: 吳和庭
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/2nx553

碩士 === 國立臺北科技大學 === 資訊工程系研究所 === 99 === With the rising demand for high bandwidth, GPON (Gigabit-capable passive optical networks) which possesses lots of distinctive advantages such as high bandwidth, good protection, easy deployment has become one of the most popular technologies in broadband access networks. The specification of GPON has been standardized by the ITU-T. This thesis discusses bandwidth allocation mechanisms on GPON. We propose a new dynamic bandwidth allocation mechanism based on the reference model by ITU-T in 2008. The dynamic bandwidth allocation mechanism utilizes the remaining bandwidth for bandwidth allocation in order to reduce average packet delay and increase bandwidth utilization levels. The simulated performance of such proposed mechanism is evaluated and compared with other proposed algorithms for various network scenarios. This thesis also discusses the relationship between the dynamic bandwidth allocation mechanism and cycle length. It reveals the impacts of the cycle length on the bandwidth allocation mechanism through the simulation results.