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- Path: sparky!uunet!wupost!gumby!yale!yale.edu!ira.uka.de!Germany.EU.net!Informatik.Uni-Dortmund.DE!pieter!bause
- From: bause@pieter.informatik.uni-dortmund.de (Falko Bause)
- Newsgroups: comp.theory
- Subject: FORMAL DEFINITION OF A QUEUE
- Date: 22 Jul 1992 10:37:32 GMT
- Organization: University of Dortmund (FRG)
- Lines: 51
- Sender: bause@pieter (Falko Bause)
- Distribution: world
- Message-ID: <14jdpcINNm6e@fbi-news.Informatik.Uni-Dortmund.DE>
- References: <1992Jul21.084828.57381@cc.usu.edu>
- Reply-To: bause@ls4.informatik.uni-dortmund.de
- NNTP-Posting-Host: pieter
- Keywords: Kendall's notation, queueing networks
-
-
-
- I'm looking for a formal definition of a queue in a queueing network.
- The usual notation introduced by Kendall (e.g. M/M/1-FCFS, M/M/1-PS)
- is rather informal and the service (scheduling) discipline is often defined
- in prose.
-
- I've found only two references giving a formal definition for
- a certain subclass of queues:
- In [1] and [2] a queue consists of a server and a queue for each
- distinguished class of customers. Each queue comprises of several
- stations (indicating the position of a customer in that queue).
- The service discipline is described by two set of parameters:
- a(i,k) := probability that a new arriving customer enters
- station (position) i of queue k (queue k is the queue
- for class k customers)
- r(i,k) := service rate for customer in station (position) i of queue k.
-
-
- As indicated by the titles of the two articles, the authors are interested
- in special classes of queues implying a product-form solution of the whole network.
- So it is not surprising, that not all queues (e.g. those with several classes
- of customers and FCFS service discipline) can be expressed in that formalism.
-
-
-
- QUESTION:
- Are there any formal definitions of queues for the specification of a wider
- range of queues (especially service disciplines) ?
-
-
- Thanks in advance. Please answer by e-mail.
-
-
- References:
-
- [1] K.M. Chandy, A.J. Martin: "A Charcterization of Product-Form Queuing Networks"
- Journal ACM 30, April 1983, pp. 286-299.
- [2] J.P. Hong, G. Kim: "Class dependent queueing disciplines with product form solutions"
- Performance'83, pp. 341-350.
-
-
- --
-
- Falko Bause ( bause@ls4.informatik.uni-dortmund.de )
- Phone: 049-231-755-4893
-
- Universitaet Dortmund, Lehrstuhl Informatik IV,
- August-Schmidt-Str. 12
- 4600 Dortmund 50
- Germany
-