小小区网络中基于本地存储协作传输策略的增益

网络的密集化是满足未来移动通信系统高吞吐量需求的有效手段，但当业务负载高时其吞吐量受到小区间干扰的严重制约。在基站端存储流行文件可以降低回传链路的成本和文件的下载时间，也为无需高容量回传链路进行基站协作提供了可能。本文分析了在小基站部署存储器后基站协作所能带来的吞吐量增益，推导了基于存储的基站协作策略的平均吞吐量，并与无干扰管理的基准小小区网络的吞吐量进行比较。分析和仿真结果表明，本地存储带来的性能增益在网络负载较高时和文件请求分布集中时非常明显。 

Performance Gain on cache enabled coordinated transmission policy in Small Cell Networks

Network densification can meet the high traffic demands in future cellular networks, whose throughput is limited by the inter-cell interference (ICI) especially when traffic load is high. Caching popular contents at the base station (BS) can reduce backhaul cost and file download time, which can also enable BS cooperation without high capacity backhaul. In this paper, we investigate the throughput gain introduced by local caching at the BSs. We derive the average throughput for the cache-enabled BS cooperation policy, and compare with a baseline network without interference coordination. Analytical and simulation results show that the caching gain is high when the traffic load is high and the popularity distribution is far from uniform.