bile network. It not only covers the enhancement to the traditional mobile broadband system but extends it to new application use cases. As shown in Figure 4-1, IMT-2020 defines three usage scenarios: enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable and low-latency com- munications (uRLLC). Enhanced mobile broadband Gigabytes in a second 3D video, UHD screens Work and play in the cloud Smart home/building Augmented reality Industry automation Voice Mission critical application Smart city Self-driving car Future IMT ((o)) Massive machine-type Ultra-reliable and low-latency communications communications Figure 4-1 IMT-2020 Usage Scenarios The ITU-R defined a set of capabilities needed for an IMT-2020-compatible technology to support the 5G use cases and scenarios. This is an important distinction: the IMT develops the use cases and capabilities, whereas other organizations propose and standardize the technology to achieve those goals. In total, they defined 13 capabilities, out of which 8 are highlighted as key capabilities. These eight capabilities are illustrated in the two spider web diagrams shown in Figure 4-2 and Fig- ure 4-3. Figure 4-2 shows the key capabilities together with the indicative target numbers as the founda- tional guidelines to develop detailed specifications for 5G radio access technology. It compares the targets with those from the previous generation of mobile technology (outlined in the IMT-Ad- vanced recommendation). User-experienced Peak data rate data rate (Gbit/s) (Mbit/s) IMT-2020 Area traffic capacity Spectrum (Mbit/s/m²) efficiency IMT-Advanced Network Mobility energy efficiency (km/h) Connection density Latency (Devices/km2) Figure 4-2 IMT-Advanced Versus IMT-2020 Key Capabilities Figure 4-3 illustrates the correlation between the use cases and the key requirements. High importance User-experienced Enhanced mobile data rate data rate broadband Medium Spectrum Area traffic efficiency capacity Network Mobility energy efficiency Ultra-rel