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
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
CLC Number:
JIN Shun-Fu, LV Qian, WANG Peng, LI Xiao-Liang. Strategy of Dynamic Bandwidth Allocation and Its Performance Analysis[J]. Computer Engineering, 2012, 38(9): 83-85,92.
金顺福, 吕倩, 王朋, 李小良. 一种动态带宽分配策略及其性能分析[J]. 计算机工程, 2012, 38(9): 83-85,92.