Abstract
We investigate control of a queueing system in which a component of the state space is subject to aging. The controller can choose to forward incoming queries to the system (where it needs time for processing), or respond with a previously generated response (incurring a penalty for not providing a fresh value). Hence, the controller faces a tradeoff between data freshness and response times. We model the system as a complex Markov decision process, simplify it, and construct a control policy. This policy shows near-optimal performance and achieves lower costs than both a myopic policy and a threshold policy.
| Original language | English |
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| Pages (from-to) | 588-617 |
| Journal | Stochastic Models |
| Volume | 31 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 |