With the global promotion of fifth-generation (5G) communications, researches for sixth generation (6G) communications are being globally launched from various perspectives. Industrial Internet-of-Things (IIoT), which is the most representative application that reflects the ubiquitous connectivity characteristics of 6G, has attracted much attention. To explore for a feasible perspective in promoting ubiquitous connectivity and improving IIoT abilities, in this paper, we seek solutions to incorporate two promising techniques, i.e. non-orthogonal multiple access (NOMA) and statistical signal transmission (SST). To accomplish such a motivation, we conceive the feasible transceiver architecture for the union of NOMA-SST technique, and elaborate workflow and detection procedures for both uplink and downlink modes. A dedicated resilient window strategy is designed thereafter, which largely strengthen weaker NOMA users’ SST performance without depressing stronger users. The proposed technique is finally testified through both simulation experiments and practical applications. Numerical results verify that NOMA-SST technique has satisfactory detection performance in common IIoT environments. It is also manifested that the proposed technique can refine various aspects, including recall rate and sensing accuracy of monitoring services, successful handling rate of emergency situations, etc. for practical IIoT applications. Such advantages are promising for practice.

中文翻译：

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当统计信号传输遇上非正交多址：工业物联网的潜在解决方案


随着第五代（5G）通信在全球的推广，第六代（6G）通信的研究正在全球范围内从不同角度展开。工业物联网（IIoT）作为体现6G无处不在的连接特性的最具代表性的应用备受关注。为了探索促进无处不在的连接和提高工业物联网能力的可行视角，在本文中，我们寻求结合两种有前途的技术的解决方案，即非正交多址（NOMA）和统计信号传输（SST）。为了实现这一动机，我们构思了结合 NOMA-SST 技术的可行收发器架构，并详细阐述了上行链路和下行链路模式的工作流程和检测程序。此后设计了专用的弹性窗口策略，该策略在很大程度上增强了较弱的 NOMA 用户的 SST 性能，而不会抑制较强的用户。最后通过仿真实验和实际应用验证了所提出的技术。数值结果验证了NOMA-SST技术在常见的IIoT环境中具有令人满意的检测性能。还表明，所提出的技术可以针对实际的工业物联网应用来细化各个方面，包括监控服务的召回率和传感精度、紧急情况的成功处理率等。这些优点在实践中很有希望。