Content Delivery in Erasure Broadcast Channels with Cache and Feedback

Asma Ghorbel, Mari Kobayashi, Sheng Yang

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish
Article number7558129
Pages (from-to)6407-6422
Number of pages16
JournalIEEE Transactions on Information Theory
Issue number11
StatePublished - Nov 2016
Externally publishedYes


  • Content delivery
  • coded caching
  • erasure broadcast channel
  • feedback


Dive into the research topics of 'Content Delivery in Erasure Broadcast Channels with Cache and Feedback'. Together they form a unique fingerprint.

Cite this