Memory-Rate Tradeoff for Caching With Uncoded Placement Under Nonuniform Random Demands

Full Characterization of Optimal Uncoded Placement for the Structured Clique Cover Delivery of Nonuniform Demands

We investigate the problem of coded caching for nonuniform demands when the structured clique cover algorithm proposed by Maddah-Ali and Niesen for decentralized caching is used for delivery. We apply this algorithm to all user demands regardless of their request probabilities. This allows for coding among the files that have different request probabilities but makes the allocation of memory to...

On the Placement and Delivery Schemes for Decentralized Coded Caching System

Network based on distributed caching of content is a new architecture to alleviate the ongoing explosive demands for rate of multi-media traffic. In caching networks, coded caching is a recently proposed technique that achieves significant performance gains compared to uncoded caching schemes. In this paper, we derive a lower bound on the average rate with a memory constraint for a family of ca...

Uncoded Placement Optimization for Coded Delivery

Existing coded caching schemes fail to simultaneously achieve efficient content placement for non-uniform file popularity and efficient content delivery in the presence of common requests, and hence may not achieve desirable average load under a non-uniform, possibly very skewed, popularity distribution. In addition, existing coded caching schemes usually require the splitting of a file into a ...

On Uncoded High Rate Transmission

| On Gaussian multiple{access channels a penalty in power eeciency is to be paid if total transmission rate is higher than 1 bit/s/Hz per dimension. This usually results from the need for higher order modulation schemes required to maintain or-thogonality of all users' signal waveforms. In this paper , we show that keeping binary modulation and accepting some multiple{access interference, is a ...

Optimal Inventory Policies for Assembly Systems Under Random Demands