Energy efficiency and delay in 5g ultra reliable low latency communications system architecture

Abstract

Emerging 5G Ultra-Reliable Low-Latency Communications (URLLC) wireless systems are characterized by minimal over-the-air latency and stringent decoding error requirements. The low latency requirements can cause conflicts with 5G Energy Efficiency (EE) design targets. Therefore, it provides a perspective on various trade-offs between energy efficiency and user plane delay for upcoming URLLC systems. For network infrastructure EE, we propose solutions that optimize base station on-off switching and distributed access network architectures. For URLLC devices, we advocate solutions that optimize EE of Discontinuous Reception (DRX), mobility measurements, and the handover process, respectively, without compromising on delay.