r Consumption One of the primary objectives of small cell deployments is to deliver a higher average downlink RF power to the UE, that is, to ensure UE experiences a lower pathloss than in macro cells. Common sense would then say that UE transmit power should on average be lower. Sec- tion 16.8.2 has shown that UE power consumption is heavily dependent on its transmit power. So it is reasonable to expect that small cells deployments should help improving UE battery life. The aim of this section is to estimate consumption savings by establishing a relationship between reference signal received power (RSRP) levels and UE power consumption using the previously defined PCON transfer functions. These estimations can only be used for illustration purposes since UE transmit activity toggles between cDRX/DTX in RRC-connected state and idle states. The estimations are then compared with field data measurements across the six use cases: radio streaming, two distinct video streaming services/applications, application down- load from Google Playstore, Skype two-way video call and a file upload use case. The analysis is accomplished in three steps: Section 'Estimating UE Transmit Power Profiles' assesses the LTE transmit power profiles from field data, Section 'Establishing Empirical Relationship This comparison does not pretend to draw general conclusions as UE 3 is a mid-range (200-300$), cost-optimized, smartphone, while UE4/5 are high-end iconic devices (600$ price range). It is therefore likely that the selection criteria for UE 3 power amplifier rely on different cost/performance trade-off criteria than those of UE 4/5. Smartphone Optimization Macro cell Small cell RSRP (dBm/15 KHz) Assumptions: -50/-60 -80 / -90 -110/-120 Test locations / RSRP levels: -69/-71 -88/-90 -109/-111 100,000 Uplink Downlink 10,000 Radio Video Video Playstore Skype video File upload streaming streaming streaming application App. 1 App. 2 download Figure 16.42 (a) Range of RSRP levels assumed for macro and small cells versus selected static tes