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Journal Articles IEEE Transactions on Information Theory Year : 2016

Content Delivery in Erasure Broadcast Channels With Cache and Feedback

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Asma Ghorbel
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  • PersonId : 975380
Mari Kobayashi
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  • PersonId : 975381
Sheng Yang

Abstract

We study a content delivery problem in a K-user erasure broadcast channel such that a content providing server wishes to deliver requested files to users, each equipped with a cache of a finite size. Assuming that the transmitter has state feedback and user caches can be filled during off-peak hours reliably by the decentralized content placement, we characterize the achievable rate region as a function of the memory sizes and the erasure probabilities for some special cases. The proposed delivery scheme, based on the broadcasting scheme by Wang and Gatzianas et al., exploits the receiver side information established during the placement phase. Our results can be extended to the centralized content placement as well as multi-antenna broadcast channels with state feedback.
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Dates and versions

hal-01433728 , version 1 (28-04-2020)

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Asma Ghorbel, Mari Kobayashi, Sheng Yang. Content Delivery in Erasure Broadcast Channels With Cache and Feedback. IEEE Transactions on Information Theory, 2016, 62 (11), pp.6407-6422. ⟨10.1109/TIT.2016.2605123⟩. ⟨hal-01433728⟩
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