5G Ultra Reliable and Low-Latency Communication: Fundamental Aspects and Key Enabling Technologies

The fifth generation (5G) mobile communication system has reached the standardization phase, after more than five years of research and development activities. Design of an ultra-reliable and low-latency communication (uRLLC) is much more challenging then 5G mobile broadband and massive IoT primary service categories. It is shown that uRLLC with stringent requirements is valid use case for latency sensitive and computing intensive real-time applications. The fundamental tradeoffs in terms of reliability-latency-throughput are outlined in this work. The requirements for achieving wireless augmented and virtual reality communications are described in the second part of the paper. The key enabling technologies for future immersive applications such as mmWave and mobile edge computing are pointed out. Directional communications above 30 GHz provide sufficient connection capacity. The concept of edge computing enables high computational resources close to the users at the same time balancing between communication and computer latency.