Agilent 5991-4594EN Power-Consumption Measurements for LTE User Equipment - Application Note c20141007 [8] free download

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Keysight Technologies Power-Consumption Measurements for LTE User Equipment Application Note If you are designing smartphone chipsets or operating a mobile network, you need to determine how certain parameters affect a speciic smartphone's power consumption and igure out how to adjust the parameters to improve battery life. In this application note we show how to use the Keysight Technologies, Inc. E6621A PXT wireless communications test set and the Keysight N6705B DC power analyzer to establish a power consumption model for LTE user equipment (UE). The model is useful when you need to examine the UE battery life in system-level simulations. We will explain how the Keysight equipment can be used in manual tests, but we do not discuss how to make automated tests (for example, using VEE software). In this application note, we analyze smartphones adhering to the 3GPP LTE standard [1]. Introduction Modern smartphones have limited battery life, and this affects user satisfaction. Chipset manufac- turers and mobile network operators will want to evaluate a smartphones' power consumption in a realistic setup and establish a power consumption model based on the evaluation. The model helps you determine how certain parameters affect a speciic smartphone's power consumption and how you can adjust the parameters to improve battery life. The key parameters are uplink (UL) and downlink (DL) data rates (R), transmit (Tx) and receive (Rx) power levels (S), cell bandwidth (BW), and discontinuous reception (DRX). The parameters affect the smartphone's modem, and more speciically, the Rx and Tx base band (BB) and Rx and Tx radio frequency (RF) components. A power consumption model that includes these components has been proposed in an article entitled Empirical LTE Smartphone Power Model with DRX Operation for Sys- tem Level Simulations [2]. It covers the contribution from each parameter on the related component, as illustrated in Figure 1. Figure 1. UE power consumption model, based on Figure 1 in [2] The model is made by measuring how each parameter affects the power consumption, but the model does so by capturing major trends and not implementation-speciic peculiarities. 03 | Keysight | Power-Consumption Measurements for LTE User Equipment - Application Note Setup description Proposed list of measurements The measurements were performed in the laboratory using The goal is to estimate how the Rx and Tx BB and RF components the Keysight E6621A PXT wireless communications test set contribute to the total modem power consumption. This goal is [3] and the N6705B DC power analyzer [4] with the N6781A achieved by varyin