Power Control Method and Device for Physical Uplink Shared Channel

Abstract

The application discloses a power control method and apparatus of a physical uplink shared channel (PUSCH). The method comprises: at each scheduling sub frame, a base station carries out statistics on an average UE number value of single scheduling among latest F scheduling; when the average UE number value changes and the changing amplitude is larger than a preset threshold value a, a maximum number Nmax of resource blocks that can be distributed to the UE is updated based on the current statistical average UE number value S; an F is a preset scheduling number times threshold value, wherein the F is larger than or equal to 1 and the a is larger than or equal to 0; and according to the current maximum number Nmax, the PUSCH resources are configured for the current scheduling UE. For each UE, when the PHR reported by the UE is not larger than 0, the base station adjusts a target SINR of the UE based on a current road loss value of the UE. For each UE, the base station adjusts the PRB of the PUSCH of the UE according to the receiving SINR reported by the UE and the current target SINR of the UE and the UE is notified. Therefore, the demand of the data rate of the terminal can be satisfied.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a physical uplink shared channel (PUSCH) power control method and device. Background technique [0002] One of the purposes of PUSCH power control in the LTE system is to ensure the quality of uplink transmission, which is specifically reflected in the transmission rate of the terminal. [0003] The power spectral density P of the base station control terminal in the LTE system RB , that is, the transmission power on a single resource block (RB), the number of RBs occupied by the terminal when performing uplink transmission is N, and the total transmission power is N×P RB , the transmission power on each RB is the same as P RB . The PUSCH power control mechanism of the LTE system is: dynamically adjust the terminal power according to the difference between the received signal-to-interference and noise ratio (SINR) of PUSCH and the target SINR. When the received SINR o...

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Problems solved by technology

In this way, the N will vary with the occupation of system resources. When N varies greatly, the total transmission power of the terminal will be N×P RB It will also change quickly, which will cause the terminal's receiving SINR to change quickly, and the system controls the terminal's modulation and coding (AMC) mode according to the terminal's receiving SINR, and the change of the terminal's receiving SINR will cause the system to Adjustment of the modulation and coding mode of the terminal. Therefore, the rapid change of the terminal receiving SINR will cause the system to be affected by the processing capability of the AMC hardware and cannot perform corresponding AMC adjustments, which will affect the performance of the AMC and eventually affect the rate of the terminal.

[0005] It can be seen that there is a contradiction between terminal scheduling and terminal power control in the existing PUSCH power control scheme, which cannot meet the requirements of terminal data rate.

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