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An extremal property of FIFO discipline in G/IFR/1 queues

Published online by Cambridge University Press:  01 July 2016

Tetsuji Hirayama  and
Masaaki Kijima
Tetsuji Hirayama*
Affiliation:
University of Electro-communications, Tokyo
Masaaki Kijima*
Affiliation:
Tokyo Institute of Technology
*
∗Postal address: Department of Communications and Systems Engineering, University of Electro-communications, Chofugaoka, Chofu-shi, Tokyo 182, Japan.
∗∗Postal address: Department of Information Sciences, Tokyo Institute of Technology, Oh-okayama, Meguro-ku, Tokyo 152, Japan.
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Abstract

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In a recent paper by Shanthikumar and Sumita (1987), it is conjectured that the ergodic sojourn time of a customer in G/IFR/1 queues is minimized by FIFO (first in, first out) discipline in the sense of increasing and convex ordering. This paper shows that their conjecture is true. In fact, FIFO discipline minimizes for any non-decreasing and convex function f, where N is the (constant) number of arrivals, θ (k) is the customer identity of the kth departing customer, and an and τ n denote the arriving and departing times of the nth customer, respectively.

Keywords

IFR SERVICE TIMESINGLE-SERVER QUEUEDYNAMIC SCHEDULINGINTERCHANGE ARGUMENT
Type
Letters to the Editor
Information
Advances in Applied Probability , Volume 21 , Issue 2 , June 1989 , pp. 481 - 484
Copyright
Copyright © Applied Probability Trust 1989 

References

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