摘要
使用到达函数和服务函数描述不同优先级实时分组集的到达和处理,基于期望可调度性来刻画不同紧急程度的实时应用对延迟的要求。提出的方法能够实现实时QoS控制下的瞬时特性研究,判定某一时刻不同优先级分组集的可调度性。最后对指数分布服务时间下的不同优先级分组集的期望可调度性进行了研究,基于理论结论的数值结果和基于模型的模拟结果是一致的。
The arrival function and service function are used to describe the arrival and processing of real-time packets in different priorities,and expected schedulability is proposed to describe the demand of delay of real-time packets.The instantaneous characteristic can be analyzed,and arrival packets with different priorities will be scheduled at any given real-time interval by the method.It investigates the probabilistic schedulability of real-time packets under exponential distribution service time in a FIFO network.The numerical analysis based on the theoretic results is consistent with the simulation analysis.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第34期107-110,214,共5页
Computer Engineering and Applications
基金
国家自然科学基金(No.60763013
No.61063045)
广西自然科学基金(No.2010GXNSFC013013)~~
关键词
多媒体网络
实时QoS
优先级调度
期望可调度性
multimedia network
real-time QoS
priority scheduling
expected schedulability
