Content Delivery Method Combined with Cache and MIMO Backhaul

Abstract

Millimeter-wave small cell networks can provide high regional throughput,but its limited return link capacity often results in block.To address the problem,a content delivery method based on the combination of cache Small Base Station(SBS) and wireless self-backhaul SBS is proposed.Some popular content is pre-stored in the cache,and the content that is not stored is transmitted by the Macro Base Station(MBS) with deployed Multi-Input and Multi-Output(MIMO).Then the expressions of coverage probability,Average Area Rate(AAR) and average area Energy Efficiency(EE) of heterogeneous network of cache and backhaul joint content delivery are derived by using the millimeter wave antenna mode,the horizon sphere model and the stochastic geometry tool.Experimental results show that this method makes the beam narrower and the transmission more directional,and improves the performance of average area rate and access link of self-backhaul transmission.