论文标题
迭代性碰撞分辨率针对异质设备的NOMA插入的Aloha
Iterative Collision Resolution for Slotted ALOHA with NOMA for Heterogeneous Devices
论文作者
论文摘要
在本文中，研究了使用不协调的多重访问（UMA）为大量异质用户服务的问题。利用异质性，我们提出了一种新型的UMA方案，称为带有非正交多重访问（NOMA）的开槽Aloha（IRSA）的迭代碰撞分辨率，以改善常规IRSA。除了在现有基于IRSA的方案中使用的斜线间连续的干扰取消（SIC）技术外，该提议的协议还采用了内部插入SIC技术，该技术可实现碰撞分辨率，以实现相撞数据包的某些配置。然后提出了一种新型的多维密度演化，以分析和优化所提出的方案。仿真结果表明，具有NOMA协议的IRSA可以有效利用用户之间的异质性，而多维密度演化可以准确预测吞吐量性能。最后，研究了带有NOMA方案的IRSA扩展到框架 - 同步设置，可以观察到与空间耦合的低密度奇偶校验检查代码相似的边界效应以引导解码过程。
In this paper, the problem of using uncoordinated multiple access (UMA) to serve a massive amount of heterogeneous users is investigated. Leveraging the heterogeneity, we propose a novel UMA protocol, called iterative collision resolution for slotted ALOHA (IRSA) with non-orthogonal multiple access (NOMA), to improve the conventional IRSA. In addition to the inter-slot successive interference cancellation (SIC) technique used in existing IRSA-based schemes, the proposed protocol further employs the intra-slot SIC technique that enables collision resolution for certain configurations of collided packets. A novel multi-dimensional density evolution is then proposed to analyze and to optimize the proposed protocol. Simulation results show that the proposed IRSA with NOMA protocol can efficiently exploit the heterogeneity among users and the multi-dimensional density evolution can accurately predict the throughput performance. Last, an extension of the proposed IRSA with NOMA protocol to the frame-asynchronous setting is investigated, where a boundary effect similar to that in spatially-coupled low-density parity check codes can be observed to bootstrap the decoding process.
