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- W2808614360 abstract "In this paper, we propose a new measure for the freshness of information, which uses the mutual information between the real-time source value and the delivered samples at the receiver to quantify the freshness of the information contained in the delivered samples. Hence, the “aging” of the received information can be interpreted as a procedure that the above mutual information reduces as the age grows. In addition, we consider a sampling problem, where samples of a Markov source are taken and sent through a queue to the receiver. In order to optimize the freshness of information, we study the optimal sampling policy that maximizes the time-average expected mutual information. We prove that the optimal sampling policy is a threshold policy and find the optimal threshold exactly. Specifically, a new sample is taken once a conditional mutual information reduces to a threshold, and the threshold is equal to the optimum value of the time-average expected mutual information that is being maximized. Numerical results are provided to compare different sampling policies." @default.
- W2808614360 created "2018-06-21" @default.
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- W2808614360 date "2018-06-01" @default.
- W2808614360 modified "2023-10-05" @default.
- W2808614360 title "Information Aging Through Queues: A Mutual Information Perspective" @default.
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- W2808614360 doi "https://doi.org/10.1109/spawc.2018.8445873" @default.
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