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.

翻译：大量部署的智能装置给网络造成了巨大的交通压力。 将边缘的缓冲作为解决这一问题的有希望的方法得到了广泛研究。 为了进一步提高缓冲手机网络的成功传输概率(STTP ), 我们将合作传输技术与CEN结合起来,并提出新的传输计划。 在每个合作基地站引入当地频道国家信息(CSI ), 以提高用户收到的信号的强度。 使用随机几何学工具为该计划的STTP 得出一个紧凑近似值。 这个计划的最佳内容定位战略是使用数字方法获得的,以最大限度地实现STTP 。 模拟结果表明,最佳战略在STP中取得了显著的收益,超过了拟议计划的若干比较基线。