Coded caching is a recently proposed technique that achieves significant
performance gains for cache networks compared to uncoded caching schemes.
However, this substantial coding gain is attained at the cost of large delivery
delay, which is not tolerable in delay-sensitive applications such as video
streaming. In this paper, we identify and investigate the tradeoff between the
performance gain of coded caching and the delivery delay. We propose a
computationally efficient caching algorithm that provides the gains of coding
and respects delay constraints. The proposed algorithm achieves the optimum
performance for large delay, but still offers major gains for small delay.
These gains are demonstrated in a practical setting with a video-streaming
prototype.Comment: 9 page
