nd networks has requirements specified by the ITU-R in an umbrella specification. In that manner, 3G mobile systems require- ments were defined in IMT-2000 around the year 2000, which further resulted in seven technologies being accepted as 3G (by 2007). The 4G requirements were specified in IMT-Advanced around 2010, and it has resulted in two technologies that have fulfilled the requirements set in it - they are LTE-Advanced (3GPP Release 10) and Mobile WiMAX 2.0 (with IEEE 802. 16m standard on radio interface). The following generation of mobile networks is noted as 5G and its requirements are specified in an umbrella called IMT-2020, again pointing to the year around which it is expected that the recom- mendation will be used for selection of the first 5G standard. The IMT-2020 umbrella has been triggered by ITU-R M.2083 [12], which initiated creation of the IMT-2020 regarding its framework and overall objectives. As usual, each next generation (IMT-2020 sets the requirements for 5G mobile networks and sys- tems) targets higher bitrates than predecessors (e.g. 4G); however, IMT-2020 mobile systems (5G) are expected to have even more diverse services requirements by enter- ing of ICTs into different verticals, (e.g. public sector, industry sectors) and at the same time to provide better QoE at lower costs (per bit or byte) as well as better affordabil- ity. Regarding QoS, its improvement is considered by use of small cells, which provide better QoS experience at the cell edges (where the signals are much attenuated in the macro cellular environment). Table 5.8 provides comparison of selected ITU objectives in IMT-Advanced (for 4G) and IMT-2020 (for 5G). There are three considered usage scenarios for IMT-2020: Enhanced mobile broadband. This is targeted at human centric access to the Internet with higher bitrates than 4G, including different mobility of users. Typically, this sce- nario is used for access to Internet OTT services and applications, including Internet video on mobile devices, which may be expected