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。

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

Abstract: 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 II traffic on the system performance is illustrated.

Key words: dynamic bandwidth allocation, Quality of Service(QoS), queuing model, multiple working vacation, Markov chains

中图分类号: 

• TP393