Performance Analysis for Cache-enabled Cellular Networks with Cooperative Transmission

TL;DR

This paper proposes a cooperative transmission scheme with caching at the network edge, using local CSI to improve success probability, and derives an optimal content placement strategy with significant performance gains.

Contribution

It introduces a novel cooperative transmission scheme with local CSI in cache-enabled cellular networks and derives an optimal content placement strategy to maximize success probability.

Findings

The proposed scheme significantly improves success transmission probability.

Optimal content placement outperforms baseline strategies.

Simulation confirms the effectiveness of the proposed approach.

Abstract

The large amount of deployed smart devices put tremendous traffic pressure on networks. Caching at the edge has been widely studied as a promising technique to solve this problem. To further improve the successful transmission probability (STP) of cache-enabled cellular networks (CEN), we combine the cooperative transmission technique with CEN and propose a novel transmission scheme. Local channel state information (CSI) is introduced at each cooperative base station (BS) to enhance the strength of the signal received by the user. A tight approximation for the STP of this scheme is derived using tools from stochastic geometry. The optimal content placement strategy of this scheme is obtained using a numerical method to maximize the STP. Simulation results demonstrate the optimal strategy achieves significant gains in STP over several comparative baselines with the proposed scheme.