HEAVY-TRAFFIC ANALYSIS OF K-LIMITED POLLING SYSTEMS. Issue 4 (27th June 2014)

• Record Type: Journal Article
• Authors: Boon, M.A.A.; Winands, E.M.M.
• Is Part Of: Probability in the engineering and informational sciences. Volume 28:Issue 4(2014)
• Page Start: 451
• Page End: 471
• Publication Date: 2014-06-27
• Subjects: Probabilities -- Periodicals; Engineering -- Statistical methods -- Periodicals; Information science -- Statistical methods -- Periodicals; 519.202462
• DOI: 10.1017/S0269964814000096
• Languages: English
• ISSNs: 0269-9648

Abstract

<abstract abstract-type="normal"> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>In this paper, we study a two-queue polling model with zero switchover times and <italic>k</italic>-limited service (serve at most <italic>k</italic>_{<italic>i</italic>} customers during one visit period to queue <italic>i, i</italic>=1, 2) in each queue. The arrival processes at the two queues are Poisson, and the service times are exponentially distributed. By increasing the arrival intensities until one of the queues becomes critically loaded, we derive exact heavy-traffic limits for the joint queue-length distribution using a singular-perturbation technique. It turns out that the number of customers in the stable queue has the same distribution as the number of customers in a vacation system with Erlang-<italic>k</italic>₂ distributed vacations. The queue-length distribution of the critically loaded queue, after applying an appropriate scaling, is exponentially distributed. Finally, we show that the two queue-length processes are independent in heavy traffic.</p> </abstract>