ISIT 2019, IEEE International Symposium on Information Theory, 7-12 July 2019, Paris, France
The work studies the K-user shared-link broadcast channel with coded caching, where each user’s file-request comes with a certain Quality-of-Service (QoS) requirement, thus
allowing – in the context of multi-layered coding – users to download only those file layers that are necessary to meet their own QoS requirements. The work characterizes the exact optimal worst-case delivery time, under the assumption of uncoded cache placement that is oblivious to the individual QoS requirement of each user. The work derives a new index coding based information theoretic converse, which interestingly tells us exactly
how to optimally cache.
Systèmes de Communication
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