【作者】 陈佳佳； 吕翔； 蔡燕秀； 范传亮； 何赛灵； 符建；

【Author】 CHEN Jiajia, LU Xiang, CAI Yanxiu, FAN Chuanliang, HE Sailing and Fu Jian Center for Optical & Electromagnetic Research in Zhejiang University, 310027

【机构】 浙江大学光及电磁波研究中心；

【摘要】 以太无源光网络(EPON)作为一种颇具竞争力的光纤到户最后一英里解决方案,近些年来越来越受到人们的重视。本文分析了EPON系统的基础结构及各个组成部分,对现行EPON中的关键问题——媒体访问控制(MAC)技术进行深入探讨,介绍了EPON的宽带接入方式,并相应地提出一种可实现业务分级的动态带宽分配方法,尤其对其中论询和申请-授权的混合机制进行了改进。在本机制中,剖析带有优先级标识的业务报告,更新轮询表,并通过终端之间的申请和授权最终实现带宽分配。更多还原

【Abstract】 The basic architecture and components of an EPON are analyzed, and the keyproblem of the bandwidth allocation algorithm in an EPON of broadband access isdiscussed. An improved dynamic bandwidth allocation method for a differentiated serviceis presented. The polling process and the request-grant process are mixed in the presentmethod. The traffic report with priority symbols is parsed, the polling table is updated, andthe bandwidth is allocated accordingly through the request and grant between the centraloffice and optical network units.更多还原