Open and Closed Loop Power Control in LTE Uplink

Abstract

3GPP LTE represents a major advance in cellular technology.The role of uplink power control is to suppress interference. Power control refers to set output power levels of transmitters, base stations in the downlink and User Equipment (UE) in the uplink. In this thesis the performance of 3GPP Long Term Evolution (LTE) closed and open loop power control combined with fractional path loss compensation factor is evaluated by simulating the effects of open loop error, Transmit Control Protocol (TCP) command. The power by the UE must be controlled to reduce the power consumption. The uplink power control schemes; the open and the closed loop power control are investigated to reduce the power consumption. The effect of the parameters; the compensation factor, the pathloss and the Power Offset were tested in order to have an operating point .The closed loop power control with fractional path loss compensation factor is found to improve the system performance in terms of mean bit rate. The results showed that an increase in any of theseparametersincreases the transmission power.