Coded Caching with Small Subpacketization via Spatial Reuse and Content Base Replication
Amirreza Asadzadeh, Giuseppe Caire · 2019
In the context of coded caching in a K-user, L-cells cellular network, we show that by using a simple decentralized content base replication scheme and exploiting spatial reuse, a very good file delivery throughput with small file subpacketization order can be achieved. In particular, this is close to the throughput achieved in a L-servers linear network or L-antenna fully connected MIMO network (up to a multiplicative factor that depends mainly on the cellular frequency reuse), where the coded caching gain and the L-fold spatial multiplexing act additively. This is another manifestation of the fact that spatial reuse is a key approach to tackle the subpacketization order problem of coded caching.