论文标题
在吞吐量改进方面，使用即时重新传输与大量MIMO进行免费赠款随机访问
On Throughput Improvement using Immediate Re-transmission in Grant-Free Random Access with Massive MIMO
论文作者
论文摘要
为了支持机器类型通信（MTC），已考虑了大量的多输入多输出（MIMO）的无授予随机访问。通常，使用大量MIMO的无赠款随机访问的性能受到前言的数量和活动设备的数量的限制。特别是，当有许多活动设备同时传输数据包时，信号到互换 - 噪声比（SINR）不能足够高以成功地解码。在本文中，为了提高绩效，我们考虑了一种有效设备的立即重新递交，该设备的SINR较低，尽管它没有经历序言碰撞以利用重新传播多样性（RTD）的增益。为了查看所提出的方法的性能，我们使用某些近似值和假设执行吞吐量分析。由于提出的方法由于立即进行了重新推荐而不稳定，因此还研究了稳定系统的条件。进行了模拟，并显示分析结果合理匹配模拟结果。
To support machine-type communication (MTC), massive multiple-input multiple-output (MIMO) has been considered for grant-free random access. In general, the performance of grant-free random access with massive MIMO is limited by the number of preambles and the number of active devices. In particular, when there are a number of active devices transmitting data packets simultaneously, the signal-to-interference-plus-noise ratio (SINR) cannot be high enough for successful decoding. In this paper, in order to improve performance, we consider immediate re-transmissions for an active device that has a low SINR although it does not experience preamble collision to exploit re-transmission diversity (RTD) gain. To see the performance of the proposed approach, we perform throughput analysis with certain approximations and assumption. Since the proposed approach can be unstable due to immediate re-transmissions, conditions for stable systems are also studied. Simulations are carried out and it is shown that analysis results reasonably match simulation results.
