Abstract: The first version of NR system mainly aimed to support the requirements of eMBB. Although URLLC is one of the most important use cases in NR system, there was less specific design for it. However, considering flexibility of system design and farward compatiblity, the design of the first NR version facilitates URLLC application and evolution in many aspects. The project of“Physical Layer Enhancements for NR Ultra-Reliable and Low Latency Communication (URLLC)”was approved in 3GPP for the design of the NR evlution system. During the research, the following potential technologies are identified for the evolution: PDCCH enhancements, UCI enhancements, PUSCH enhancements,enhancements to scheduling/HARQ/CSI processing timeline, UL inter UE Tx prioritization/multiplexing, and UL configured grant transmission, and etc.

Key words: NR, URLLC, high reliability, low latency