PRIORITIZED URLLC AND EMBB SERVICES IN 5G NR: A SUBJECT FIELD REVIEW

According to Cisco¹⁰ the demand for mobile broadband services as well as the number of mobile network, users increases every year. A considerable amount of frequency resources is needed to provide users with required level of service quality (QoS). The next generation of telecommunication (5G) is designed to solve the emerging problems of resources shortage. In addition, 5G provides opportunities for use in other areas such as the Internet of Things (IoT), smart cities, vehicular networks, and Industry 4.0, which have technologically complex design requirements, including high number of devices and mobile data per area, high data rates, and low latency. To support Industry 4.0 applications such as industrial automation, the New Radio (NR) technology offers simultaneous support for both ultra-reliable low-latency services (URLLC) and conventional enhanced mobile broadband services (eMBB). The manufacturing equipment can use URLLC service, for motion control and synchronous operation, and eMBB service, for remote monitoring. Several approaches are being developed to meet the extreme latency and reliability requirements of URLLC services, and each of these approaches brings its own design issues and challenges. Existing articles investigate various approaches to applying 5G networks in industry, including the simultaneous coexistence of URLLC and eMBB services. However, they practically do not consider such a promising approach as prioritizing for different types of services, which can positively impact performance metrics and network compliance. Thus, we examine data from the last 8 years and papers on various approaches and technologies of fifth generation networks in Industry 4.0, including those declicatecl to using models of supporting two service types at the same time, and present a current and brief review of the topic, identifying the most and the least popular approaches, suggesting a gap in knowledge and the need for the development of certain research.