arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.3024math.PR
收藏

多类排队的不动点

Fixed points for multi-class queues

James B. Martin, Balaji Prabhakar

摘要:

伯克定理可以看作是指数型单服务台排队的不动点定理;当到达过程是泊松过程时,离开过程与到达过程具有相同的分布。我们认为,这一结果的扩展到多类型的队列中,不同类型的客户有不同的优先级。我们工作的一个模型,其中包括离散时间和连续时间的M/M/1队列,以及队列与指数或几何服务批次发生在离散时间或在点的泊松过程。不动点的结果证明了串联队列,这是以前建立的一种类型的M/M/1系统的可扩展性。一些固定点的结果已经推导出作为一个后果的建设的固定分布的多类型的相互作用的粒子系统,我们解释了这两个框架之间的联系。不动点对于低优先级客户具有有趣的“聚类”属性。一个极端的例子是布朗队列,其中低优先级的工作只发生在一组度量为0的时间(并且对应于高优先级工作的时间长度过程的本地时间过程)。

英文摘要:

Burke's theorem can be seen as a fixed-point result for an exponential single-server queue; when the arrival process is Poisson, the departure process has the same distribution as the arrival process. We consider extensions of this result to multi-type queues, in which different types of customer have different levels of priority. We work with a model of a queueing server which includes discrete-time and continuous-time M/M/1 queues as well as queues with exponential or geometric service batches occurring in discrete time or at points of a Poisson process. The fixed-point results are proved using interchangeability properties for queues in tandem, which have previously been established for one-type M/M/1 systems. Some of the fixed-point results have previously been derived as a consequence of the construction of stationary distributions for multi-type interacting particle systems, and we explain the links between the two frameworks. The fixed points have interesting "clustering" properties for lower-priority customers. An extreme case is an example of a Brownian queue, in which lower-priority work only occurs at a set of times of measure 0 (and corresponds to a local time process for the queue-length process of higher priority work).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑