Uplink power control method and system of LTE (Long Term Evolution) system

Abstract

The invention discloses an uplink power control method and a system of an LTE (Long Term Evolution) system, wherein the method comprises the following steps: the average interference lower limit M of user equipment on a neighbor area is determined by a base station, the average interference upper limit M' of the user equipment on the neighbor area is allocated by the base station, and then a link loss compensation coefficient beta of the base station is determined according to the average interference upper limit and the average interference lower limit of the user equipment on the neighbor area and the link loss of the user equipment; power authorized delta'TF(i) on a unit resource block when the neighbor area is interfered is computed and considered by the base station according to the link loss compensation coefficient beta, and then resource block number MPUSCH(i) occupied by a physical uplink shared channel (PUSCH) and a modulation coding mode are obtained according to the power authorized delta'TF(i); the difference f(i) of the resource block number, the modulation coding mode, the actual signal to interference and noise ratio and the target signal to interference and noise ratio is issued to the user equipment through uplink authorization, the deltaTF(i) is obtained through computation and lookup by the user equipment according to the resource block number and the modulation coding mode, and then the transmission power is adjusted by the user equipment according to the deltaTF(i), the f(i) and the MPUSCH(i).

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a method and system for uplink power control of an LTE system. Background technique [0002] Since 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution, Long Term Evolution) uplink adopts single-carrier frequency division multiple access (Single-Carrier Frequency Division Multiple Access, SC- FDMA) technology, the uplink signals of different user equipment (User Equipment, UE) in a cell are mutually orthogonal, so there is no code division multiple access (CDMA) system that performs power control due to the near-far effect necessity. [0003] LTE uplink power control is mainly used to compensate channel path loss and suppress inter-cell interference. The power control mechanism of inter-cell interference suppression is different from that of single-cell power control. Single-cell power control is only used for path loss compensation. When a UE'...

AI Technical Summary

Problems solved by technology

The domestic patent application number is 200810096198.2, and the invention name is "path loss compensation factor configuration method and device". A method for adjusting the path loss compensation coefficient for the LTE system is given. Considering the interference factor, the base station adjusts the path loss compensation coefficient to adjust The uplink transmission power is notified to the UE, but the maximum utilization of the transmission power cannot be guaranteed, and the combination of power control and resource allocation is not considered to improve the overall system performance

Images