Before revision:   Finally, we consider two applications of our cache network model : (i) directly mapping to content distribution and (ii) generalization to wireless sensor network by jointly considering content caching and content compression. We characterize the tradeoff among caching, compression and communication via a nonlinear non-convex optimization problem. We show that it can be transformed into an equivalent convex problem. The obtained numerical results provide us with insights into how to optimize the performance .
After revision:  Finally, we consider two applications of our cache network model : (i) directly mapping to content distribution .