标题： 一种用于密集大规模MIMO系统中机器类型通信的高吞吐量导频分配 显示英文标题

标题： A High Throughput Pilot Allocation for M2M Communication in Crowded Massive MIMO Systems

摘要： 一种新的方案用于解决拥挤的大量输入输出（MIMO）系统中机器对机器（M2M）通信的小区内导频碰撞。该方案允许那些通过最强用户碰撞解决（SUCR）协议判断为失败的用户设备（UE），竞争空闲导频，即在初始步骤中未被任何UE选择的导频。此方案称为SUCR结合空闲导频接入（SUCR-IPA）。为了分析SUCR-IPA方案的性能，我们开发了一种简单的方法来计算每个随机接入时隙（RAST）中UE的接入成功概率。仿真结果与分析结果非常吻合。还表明，与SUCR协议相比，所提出的SUCR-IPA方案显著提高了系统的吞吐量，从而大幅减少了接入尝试次数。 显示英文摘要

摘要： A new scheme to resolve the intra-cell pilot collision for M2M communication in crowded massive multiple-input multiple-output (MIMO) systems is proposed. The proposed scheme permits those failed user equipments (UEs), judged by a strongest-user collision resolution (SUCR) protocol, to contend for the idle pilots, i.e., the pilots that are not selected by any UE in the initial step. This scheme is called as SUCR combined idle pilots access (SUCR-IPA). To analyze the performance of the SUCR-IPA scheme, we develop a simple method to compute the access success probability of the UEs in each random access slot (RAST). The simulation results coincide well with the analysis. It is also shown that, compared to the SUCR protocol, the proposed SUCR-IPA scheme increases the throughput of the system significantly, and thus decreases the number of access attempts dramatically.