一种动态带宽分配策略及其性能分析  

Strategy of Dynamic Bandwidth Allocation and Its Performance Analysis

作　　者：金顺福[1] 吕倩[1] 王朋[1] 李小良[2] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004 [2]开滦(集团)有限责任公司信息与控制中心,河北唐山063018

出　　处：《计算机工程》2012年第9期83-85,92,共4页Computer Engineering

基　　金：河北省自然科学基金资助项目(F2009000475)

摘　　要：针对当前网络中不同业务的服务质量需求,综合考虑业务优先级及业务负载,提出一种动态带宽分配策略——E-DBA。建立具有多重工作休假机制的Geom/G/1排队模型,使用嵌入式马尔可夫链导出排队模型的稳态指标。给出E-DBA的平均响应时间和信道利用率等系统性能指标表达式,并通过实验分析了第II类业务的保障带宽对系统性能的影响。Aiming at Quality of Service（QoS） requirements of different traffics in the current network, a dynamic bandwidth allocation strategy named E-DBA is proposed by taking into account both the traffic priority and system load. Geom/G/1 queuing model with multiple working vacations mechanism is established. By using the method of embedded Markov chain, the steady-state measures of the queueing model are derived. The performance measures in terms of the average response time and system utility of E-DBA are given. With experiments, the influence of the guaranteed bandwidth of class Ⅱtraffic on the system performance is illustrated.

关 键 词：动态带宽分配 服务质量 排队模型 多重工作休假 马尔可夫链 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]