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- W2964130156 abstract "Caching and multicasting at base stations are two promising approaches to support massive content delivery over wireless networks. However, existing scheduling designs do not make full use of the advantages of the two approaches. In this paper, we consider the optimal dynamic multicast scheduling to jointly minimize the average delay, power and fetching costs for cache-enabled content-centric wireless networks. We formulate this stochastic optimization problem as an infinite horizon average cost Markov decision process (MDP). It is well-known to be a difficult problem and there generally only exist numerical solutions. By using relative value iteration algorithm and the special structures of the request queue dynamics, we analyze the properties of the value function and the state-action cost function of the MDP for both the uniform and nonuniform channel cases. Based on these properties, we show that the optimal policy, which is adaptive to the request queue state, has a switch structure in the uniform case and a partial switch structure in the nonuniform case. Moreover, in the uniform case with two contents, we show that the switch curve is monotonically non-decreasing. The optimality properties obtained in this paper can provide design insights for practical networks." @default.
- W2964130156 created "2019-07-30" @default.
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- W2964130156 date "2015-06-01" @default.
- W2964130156 modified "2023-10-17" @default.
- W2964130156 title "Optimal dynamic multicast scheduling for cache-enabled content-centric wireless networks" @default.
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- W2964130156 doi "https://doi.org/10.1109/isit.2015.7282688" @default.
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