一种新的基于认购速率和QoS等级的动态带宽分配算法  

A Novel Dynamic Bandwidth Assignment Scheme Based on Subscription Rate and QoS in GPONs

作　　者：王欣[1] 张永军[1] 顾畹仪[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《中国电子科学研究院学报》2007年第3期250-253,282,共5页Journal of China Academy of Electronics and Information Technology

基　　金：教育部新世纪优秀人才支持计划(NCET-05-0112);国家863项目(2006AA01Z246)

摘　　要：为了实现吉比特无源光网络带宽分配的公平性,降低网络的传输延时,设计了一种新的媒质访问控制协议,提出了一种新的动态带宽分配算法。其基本思想是:在保证拥有不同QoS业务的用户得到认购速率的基础上,根据网络负载的大小,动态地将某些用户未使用的带宽分配给其他带宽需求大的用户,以提高网络的带宽利用率。仿真结果表明,这种新的算法在严格控制数据传输延时的前提下,能够保证多用户之间带宽分配的公平性。In order to achieve better fairness on bandwidth allocation among users in GPON, and reduce the packet transmission delay, a new MAC protocol is designed and a novel dynamic bandwidth assignment scheme is proposed. The main idea of the scheme is： to improve the utilization of bandwidth, the bandwidth that is unused by several users will be allocated dynamically, according to the network load, among the users whose requirements are not satisfied, based on the guarantee that each user with different QoS services can obtain the subscription rate. It is demonstrated through the simulation restdts that the new algorithm can guarantee the fairness of bandwidth allocation among users and can achieve relatively small transmission delay.

关 键 词：吉比特无源光网络 光线路终端 光网络单元 动态带宽分配 认购速率 服务质量 

分 类 号：TN915[电子电信—通信与信息系统]