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On the Stability of Greedy Polling Systems with General Service Policies

Published online by Cambridge University Press:  27 July 2009

Serguei Foss
Affiliation:
Novosibirsk State University and Technical University of BraunschweigPF 3329, 38023 Braunschweig, Germany
Günter Last
Affiliation:
Novosibirsk State University and Technical University of BraunschweigPF 3329, 38023 Braunschweig, Germany

Abstract

We consider a polling system with a finite number of stations fed by compound Poisson arrival streams of customers asking for service. A server travels through the system. Upon arrival at a nonempty station i, say, with x > 0 waiting customers, the server tries to serve there a random number B of customers if the queue length has not reached a random level C < x before the server has completed the B services. The random variable B may also take the value ∞ so that the server has to provide service as long as the queue length has reached size C. The distribution Hi, x of the air (B, C) may depend on i and x while the service time distribution is allowed to depend on i. The station to be visited next is chosen among some neighbors according to a greedy policy. That is to say that the server always tries to walk to the fullest station in his well-defined neighborhood. Under appropriate independence assumptions two conditions are established that are sufficient for stability and sufficient for instability. Some examples will illustrate the relevance of our results.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1998

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