Closed-loop power control correction method based on LET-A system

Abstract

The invention discloses a closed-loop power control correction method based on an LET-A system. The method comprises a step of calculating a distance between a user and a base station and estimating path loss, shadow fading and dependent gain of an antenna; a step of determining a correlated path loss compensation factor [alpha] according to the path loss; a step of counting the reception power RSRP of reference signals of all user equipment (UE) in a district according to a common reference signal sent by the base station and the path loss; a step of dividing the district into three areas, wherein when the UE is positioned in a superior area, the emission power is continuously increased on the basis of an original emission power; when the UE is positioned in a middle area, proper compensation is performed for the path loss as the path loss is increasing, i.e., the emission power is gradually increased with the increase in the path loss; and the UE is positioned in a fringe area, the emission power is reduced on the basis of a closed-loop power; and a step of re-sending a TPC command according to a correction factor, and selecting the emission power according to the area where the UE is. The closed-loop power control correction method provided by the invention considers three factors of district average throughout, a fringe user throughout and interference of adjacent districts.

Description

technical field [0001] The invention relates to the technical field of LTE communication, in particular to a power control algorithm in the LTE-A system. Background technique [0002] "Mobile changes life". With the development of mobile communications and the issuance of 4G licenses, 4G has gradually entered people's lives. The technology's high throughput, low bit error rate, minimized interference, and maximized battery life The superiority appears directly in the communication process. These technological advances are inseparable from power control technology. Whether for the base station or the UE itself, power is the most important resource after frequency in the communication process. We hope to communicate with reasonable power as much as possible to ensure a good While improving communication quality and user experience, power consumption is saved to the greatest extent. [0003] Although the maximum transmit power corresponds to the maximum throughput, the cell e...

AI Technical Summary

Problems solved by technology

The basic principle of OLPC is to set the transmission power based on the UE's own measurement value; the basic principle of CLPC is that the UE needs to feedback information to the eNodeB, that is to say, the UE can transmit power according to more accurate control information sent by the eNodeB, so this The performance of this power control mechanism is better, but it also takes up more channels and generates greater delay to send control signaling

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