URLLC for 5G and Beyond: Requirements, Enabling Incumbent Technologies and Network Intelligence

The tactile internet (TI) is believed to be the prospective advancement of things (IoT), comprising human-to-machine and machine-to-machine communication. TI focuses on enabling real-time interactive techniques with a portfolio engineering, social, commercial use cases. For this purpose, $5^{th}$ generation (5G) technology achieving ultra-reliable low latency communication (URLLC) services. applications require an extraordinary degree reliability latency. notation="LaTeX">$3^{rd}$ partnership project (3GPP) defines that URLLC expected provide 99.99% single transmission 32 bytes packet less than one millisecond. 3GPP proposes include adjustable orthogonal frequency division multiplexing (OFDM) technique, called 5G new radio (5G NR), as access (RAT). Whereas, emergence novel physical layer RAT, need for design next-generation technologies arises, especially focus network intelligence. In such situations, machine learning (ML) are essential assist in designing intelligent resource allocation protocols NR requirements. Therefore, survey, we present possibility federated reinforcement (FRL) which ML techniques, requirements summarizes corresponding achievements URLLC. We comprehensive discussion MAC channel mechanisms enable TI. Besides, identify seven very critical future cases FRL potential enablers NR.