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Conference papers
Opportunistic Content Delivery in Fading Broadcast Channels
Abstract : We consider content delivery over fading broadcast channels. A server wants to transmit K files to K users, each equipped with a cache of finite size. Using the coded caching scheme of Maddah-Ali and Niesen, we design an opportunistic delivery scheme where the long-term sum content delivery rate scales with the number of users in the system. The proposed delivery scheme combines superposition coding together with appropriate power allocation across sub-files intended to different subsets of users. We analyze the long- term average sum content delivery rate achieved by two special cases of our scheme: 1) a selection scheme that chooses the subset of users with the largest weighted rate, and 2) a baseline scheme that transmits to all K users using the scheme of Maddah-Ali and Niesen. We prove that coded caching with appropriate user selection is scalable since it yields a linear increase of the average sum content delivery rate.
Cited literature [13 references]
https://hal-centralesupelec.archives-ouvertes.fr/hal-01568780
Contributor : Sheng Yang <>
Submitted on : Thursday, April 9, 2020 - 6:23:08 PM
Last modification on : Tuesday, April 14, 2020 - 9:02:02 AM
Contributor : Sheng Yang <>
Submitted on : Thursday, April 9, 2020 - 6:23:08 PM
Last modification on : Tuesday, April 14, 2020 - 9:02:02 AM
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ghorbel_opportunistic.pdf
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