集成服务模型在宽带接入网中的设计与实现  

The Implementation of IntServ Model in Broadband Access Network

作　　者：邹君妮[1] 熊红凯[2] 林如俭[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072 [2]上海交通大学图像通信与信息处理研究所,上海200240

出　　处：《上海交通大学学报》2006年第3期416-420,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(60502033);上海市科委技术发展基金(04dz12045)资助项目

摘　　要：为了在以太无源光网络(EPON)中实现集成服务模型,结合EPON的特殊架构,对子网带宽管理协议(SBM)进行改进,提出了在EPON中实现资源预留的解决方案.将基于会话的状态刷新转变为基于逻辑链路标识符(LLID)的组刷新,减小了信令开销.为控制资源预留业务的实际服务速率,提出了带逼近因子的P2PFQ调度算法,一方面缓解了PFQ系统的数据超前发送现象;另一方面改善了best-effort业务的排队时延.Based on EPON architecture,an improved Subnet Bandwidth Manager （SBM） protocol was proposed to implement IntServ model in EPON. To reduce protocol overhead, it substitutes LLID-based soft state refreshment for traditional session-based refreshment. To achieve linear relation between service rates and reserved rates of guaranteed services, the P^2PFQ scheduling algorithm was presented. Depending on an approximation factor, the phenomenon that the PFQ is ahead of GPS is eliminated. Furthermore, the queueing delay and business of best-effort services are efficiently improved.

关 键 词：集成服务 以太无源光网络 资源预留 分组调度 

分 类 号：TN915.6[电子电信—通信与信息系统]