Advances in Applied Probability

Exact Monte Carlo simulation for fork-join networks

Hongsheng Dai

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Abstract

In a fork-join network each incoming job is split into K tasks and the K tasks are simultaneously assigned to $K$ parallel service stations for processing. For the distributions of response times and queue lengths of fork-join networks, no explicit formulae are available. Existing methods provide only analytic approximations for the response time and the queue length distributions. The accuracy of such approximations may be difficult to justify for some complicated fork-join networks. In this paper we propose a perfect simulation method based on coupling from the past to generate exact realisations from the equilibrium of fork-join networks. Using the simulated realisations, Monte Carlo estimates for the distributions of response times and queue lengths of fork-join networks are obtained. Comparisons of Monte Carlo estimates and theoretical approximations are also provided. The efficiency of the sampling algorithm is shown theoretically and via simulation.

Article information

Source
Adv. in Appl. Probab., Volume 43, Number 2 (2011), 484-503.

Dates
First available in Project Euclid: 21 June 2011

Permanent link to this document
https://projecteuclid.org/euclid.aap/1308662489

Mathematical Reviews number (MathSciNet)
MR2848387

Zentralblatt MATH identifier
1220.65010

Subjects
Primary: 65C05: Monte Carlo methods 65C50: Other computational problems in probability
Secondary: 60K20: Applications of Markov renewal processes (reliability, queueing networks, etc.) [See also 90Bxx] 60K25: Queueing theory [See also 68M20, 90B22]

Keywords
Coupling from the past fork-join network perfect sampling read-once coupling from the past

Citation

Dai, Hongsheng. Exact Monte Carlo simulation for fork-join networks. Adv. in Appl. Probab. 43 (2011), no. 2, 484--503. https://projecteuclid.org/euclid.aap/1308662489


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