256Tx X 256Rx 8Tx X 8Rx 3 (Indoor) 30 (Outdoor) 1000 (DL + UL) 256Tx X 256Rx 32Tx X 32Rx High speed 200 (DL + UL) 256Tx X 256Rx 8Tx X 8Rx 500 (Outdoor) 30, 70 1000 (DL + UL) 256Tx X 256Rx 32Tx X 32Rx Extreme long 40 (DL + UL) 160 (Outdoor) distance coverage Urban macro- 0.7 (2.1) 10 (50) 64TxX4Rx 2Tx X 2Rx (Indoor/Outdoor) division duplex (FDD) systems and the aggregated system bandwidth used for either DL or UL via switching in time-domain in TDD systems. 3.3 High-Level Architectural Requirements The desire to support different UE types, services, and technologies in 5G has been driving the development of the NR standards in 3GPP. The key objective of the 5G systems is to support new deployment scenarios and to address the requirements of diverse market seg- ments. As we mentioned earlier, 5G systems have certain key characteristics such as support for myriad of radio access technologies, scalable and customizable network architecture, rigorous KPIs, flexibility and programmability, and resource efficiency (both on the user and control planes) as well as seamless mobility in densely populated heterogeneous envir- onments and support for real-time and non-real-time multimedia services and applications with improved quality of experience (QoE). Thus the architecture next-generation QoE is an important measure of the end-to-end performance at the service level from the user's perspective and an important metric for the design of systems. QoE is related to but differs from QoS, which embodies the notion that hardware and software characteristics can be measured, improved, and guaranteed. In con- trast, QoE expresses user satisfaction both objectively and subjectively. It is often used in information tech- nology and consumer electronics. QoE, while not always numerically quantifiable, is the most significant single factor in the real-world evaluation of the user experience. Major factors that affect QoE include cost, reliability, efficiency, privacy, security, interface user-friendliness, and user confidence. Introd