基于串联排队网络理论,将同时承载M2M(Machine to machine)业务和H2H(Hu-man to human)业务的通信网络建模为离散时间会话级串联排队网络,研究了海量M2M小数据业务对H2H业务的影响。在生成函数域提出了服务等效方法,把网络对M2M业务的...基于串联排队网络理论,将同时承载M2M(Machine to machine)业务和H2H(Hu-man to human)业务的通信网络建模为离散时间会话级串联排队网络,研究了海量M2M小数据业务对H2H业务的影响。在生成函数域提出了服务等效方法,把网络对M2M业务的服务映射到网络对H2H业务的服务时间分布中,得到了实际服务过程的等效表达式,解决了混合业务到达、异构服务给串联排队网络的离去过程分析带来的求解困难的问题。求解了串联排队系统,得到了M2M业务到达率、服务速率与H2H业务端到端性能指标的关系,讨论了M2M业务准入控制方法。展开更多
In this paper, we consider a tandem of two head-of-line (HOL) non-preemptive priority queuing systems, each with a single server and a deterministic service-time. Two classes of traffic are considered, namely high pri...In this paper, we consider a tandem of two head-of-line (HOL) non-preemptive priority queuing systems, each with a single server and a deterministic service-time. Two classes of traffic are considered, namely high priority and low priority traffic. By means of a generating function approach, we present a technique to derive closed-form expressions for the mean buffer occupancy at each node and mean delay. Finally, we illustrate our solution technique with some numerical examples, whereby we illustrate the starvation impact of the HOL priority scheduling discipline on the performance of the low-priority traffic stream. Our research highlights the important fact that the unfairness of the HOL priority scheduling becomes even more noticeable at the network level. Thus this priority mechanism should be used with caution.展开更多
文摘基于串联排队网络理论,将同时承载M2M(Machine to machine)业务和H2H(Hu-man to human)业务的通信网络建模为离散时间会话级串联排队网络,研究了海量M2M小数据业务对H2H业务的影响。在生成函数域提出了服务等效方法,把网络对M2M业务的服务映射到网络对H2H业务的服务时间分布中,得到了实际服务过程的等效表达式,解决了混合业务到达、异构服务给串联排队网络的离去过程分析带来的求解困难的问题。求解了串联排队系统,得到了M2M业务到达率、服务速率与H2H业务端到端性能指标的关系,讨论了M2M业务准入控制方法。
文摘In this paper, we consider a tandem of two head-of-line (HOL) non-preemptive priority queuing systems, each with a single server and a deterministic service-time. Two classes of traffic are considered, namely high priority and low priority traffic. By means of a generating function approach, we present a technique to derive closed-form expressions for the mean buffer occupancy at each node and mean delay. Finally, we illustrate our solution technique with some numerical examples, whereby we illustrate the starvation impact of the HOL priority scheduling discipline on the performance of the low-priority traffic stream. Our research highlights the important fact that the unfairness of the HOL priority scheduling becomes even more noticeable at the network level. Thus this priority mechanism should be used with caution.
