Design and Implementation of a Low-Latency and High-Reliability System Based on Software-Defined Radio (SDR)

Ultra-reliable and low-latency communication (URLLC) is one of the three major service classes supported by the fifth generation (5G) New Radio (NR) technical specifications. In this paper, we introduce a physical layer architecture that can meet the low-latency and high-reliability requirements. The downlink system is designed according to the Third Generation Partner Project (3GPP) specifications based on software defined radio (SDR) system. The URLLC system physical layer downlink is implemented on the open source OpenAirInterface (OAI) platform to evaluate the latency and reliability performance of the scheme. Not only the URLLC system reliability performance is tested based on the simulation platform, but also the delay performance is evaluated by the realization of the over-the-air system. The experimental results show that the designed scheme can approximately meet the reliability and delay performance requirements of the 3GPP specifications.