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.
出处
《计算机工程》
CAS
CSCD
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)
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
dynamic bandwidth allocation
Quality of Service（QoS）
queuing model
multiple working vacation
Markov chains
