乙太被動光纖網路動態頻寬分配-使用增強Deficit Round Robin Algorithm

Abstract

目前各種類型的多媒體不斷的增加與發展，使得現在使用者對網路的頻寬需求大量增加，並且隨著各種多媒體有不同的連線品質需求，透過光具有傳輸速度快、錯誤率低，極低的訊號衰減等優勢，因此光纖網路便成為佈建下一代高速網路的首選。為了可以達到動態頻寬的分配以及滿足各種多媒體的服務品質需求，降低封包的延遲及縮小彼此封包延遲的差異就成為目前的首要任務。 本篇論文探討為乙太被動式光纖網路(EPON)的資料上傳管理，此演算法目的主要是可以公平的分配頻寬，透過將問題轉化以及適當的修改，成功的將封包的延遲降低並且同時減少封包的平均延遲變異數。之後在本篇論文會詳細的探討此演算法的詳細流程，最後透過模擬驗證確實可以有效達到我們所要求地結果。

Due to multimedia programs are increased and developed nowadays, the required bandwidth to many users is increased rapidly, too. The advantage of light is high transmission rate, low bit error rate, and extremely low signal attenuation. Therefore, optical network is the best choice to build next generation high speed network. In order to achieve dynamic bandwidth allocation and satisfy the demand for quality of service, the decrease in packet delay and delay variance are both the most important issues for us to improve. In this article, we focus mainly on management of upstream traffic on EPON. The purpose of this algorithm is that bandwidth can be allocated fairly through adaptive modified the original. Furthermore, we also successfully decrease the mean packet delay and delay variance. A detailed description of the algorithm will be given in the text and the simulation result will show it can really achieve our requirements.