北京交通大学学报
北京交通大學學報
북경교통대학학보
JOURNAL OF NORTHERN JIAOTONG UNIVERSITY
2011年
2期
137-144
,共8页
熊轲%裘正定%张煜%郭宇春%张宏科
熊軻%裘正定%張煜%郭宇春%張宏科
웅가%구정정%장욱%곽우춘%장굉과
TNPOSS%QTNPOSS%end%to%end%delay%bound%fractal%leak%bucket%WFQ%network%calculus
TNPOSS%QTNPOSS%end%to%end%delay%bound%fractal%leak%bucket%WFQ%network%calculus
TNPOSS%QTNPOSS%end%to%end%delay%bound%fractal%leak%bucket%WFQ%network%calculus
为增强TNPOSS网络的QoS性能,通过引入分形令牌桶(FLB)和加权公平队列调度(WFQ),提出了QoS增强的TNOPSS(QTNPOSS)网络模型.在QTNPOSS中,网络多媒体流的数据包在到达网络节点时进行整形,而后通过WFQ输出.利用网络微积分工具,分析了QTNPOSS网络的最大端到端延时表达式.大量数值实验表明,多媒体流的长相关特性和WFQ的权重对QTNPOSS网络的延时都有影响,其中WFQ权重对QTNPOSS网络端到端延时的影响更大.
為增彊TNPOSS網絡的QoS性能,通過引入分形令牌桶(FLB)和加權公平隊列調度(WFQ),提齣瞭QoS增彊的TNOPSS(QTNPOSS)網絡模型.在QTNPOSS中,網絡多媒體流的數據包在到達網絡節點時進行整形,而後通過WFQ輸齣.利用網絡微積分工具,分析瞭QTNPOSS網絡的最大耑到耑延時錶達式.大量數值實驗錶明,多媒體流的長相關特性和WFQ的權重對QTNPOSS網絡的延時都有影響,其中WFQ權重對QTNPOSS網絡耑到耑延時的影響更大.
위증강TNPOSS망락적QoS성능,통과인입분형령패통(FLB)화가권공평대렬조도(WFQ),제출료QoS증강적TNOPSS(QTNPOSS)망락모형.재QTNPOSS중,망락다매체류적수거포재도체망락절점시진행정형,이후통과WFQ수출.이용망락미적분공구,분석료QTNPOSS망락적최대단도단연시표체식.대량수치실험표명,다매체류적장상관특성화WFQ적권중대QTNPOSS망락적연시도유영향,기중WFQ권중대QTNPOSS망락단도단연시적영향경대.
To enhance the QoS performance of TNPOSS network, this paper proposes a QoS-enhanced TNPOSS (QTNPOSS) network model by introducing Fractal Leak Bucket (FLB) shaper and Weighted Fair Queuing (WFQ) scheduler. In the QTNPOSS model, multimedia stream packets are shaped by FLBs at the input of a router and output by the WFQ queues. We analyze the maximum end-to-end (E2E) delay of QTNPOSS network using the network calculus. Extensive numerical experiments show that both the long-range dependence (LRD) property of the multimedia streams and the weight of the queues have impacts on the maximal E2E delay, and the WFQ weight influences the E2E delay bound more greatly than the LRD property does.
