【摘要】 现有蜂窝5G/B5G高可靠低时延通信（ultra-reliable and low latency communications,URLLC）标准3GPP Release 17-18采用经典正交频分复用（OFDM）多载波波形传输，因其工作在授权频带，较少考虑URLLCOFDM多载波传输抗干扰策略。未来工业物联网异构多服务质量（quality of service,QoS）业务大部分部署于非授权频带，其无线通信链路变得复杂，现有URLLC-OFDM波形无法完全为工业物联网信息传输提供高可靠性、低时延的苛刻要求。首先，基于子载波可配置的OFDMA，将鲁棒性更高的子载波跳频（subcarrier frequency hopping,Sub-FH）技术应用于OFDMA中（即Sub-FH/OFDMA），以提高信号传输可靠性。然后，设计将Sub-FH/OFDMA波形融合到以微时隙为基本单位的调度策略中。该调度策略采用Hamming编码+微时隙结合的混合自动重传请求（HARQ）机制，有效降低端到端传输的重传次数，旨在提升节点传输的实时性。并推导了信息误码（块）率与重传次数的折中理论关系。仿真结果表明，在面对外部电磁干扰和内部多用户干扰时，该方案能够保障物联网节点的稳定传输质量，并在目标误块率为10-5时实现毫秒级短数据包的传输时延。通过波形设计和MAC时隙调度的跨层级设计，为未来B5G/6G通信在复杂工业物联网场景中的实际应用提供了可行解决方案。更多还原

【Abstract】 The classical OFDM multicarrier waveforms for transmission are adopted by the existing 5G/B5G URLLC standard(3GPP R17-18), and less attention is paid to the anti-interference strategy of URLLC-OFDM multicarrier transmission due to its operation in the licensed frequency band. In the future, unlicensed frequency bands will host most heterogeneous multi-QoS services for IIoT, resulting in complex wireless communication links. The stringent requirements of high reliability and low latency for IIoT information transmission can not be fully met by the existing URLLC-OFDM waveforms. Firstly, the more robust Sub-FH technique was applied to OFDMA based on subcarrierconfigurable OFDMA(i.e., Sub-FH/OFDMA) to improve the signal transmission reliability. Additionally, the Sub-FH/OFDMA waveforms were incorporated into a scheduling strategy with mini-slots as the basic unit. Hamming coding + mini-slot hopping HARQ were utilized by this scheduling strategy to effectively reduce the amount of retransmissions, which aim to enhance the real-time transmission among IIoT nodes. The theoretical relationship between BER/BLER and transmission delay was derived and compromises were made. Simulation results demonstrate that the scheme can ensure stable transmission quality of IIoT nodes despite external electromagnetic interference and internal multi-user interference, achieving a transmission delay of milliseconds when the target BLER is 10-5. A feasible solution for the future practical application of B5G/6G communication in complex IIoT scenarios is provided through the cross-layer design of waveform design and MAC slot scheduling in this paper.更多还原