PUSCH (physical uplink shared channel) power control method and PUSCH power control device

Abstract

The invention relates to communication technology and discloses a PUSCH (physical uplink shared channel) power control method and a PUSCH power control device. PUSCH power of a current cell user is adjusted by determining own conditions of interference to adjacent cells according to interference level information sent by the adjacent cells, and accordingly power control according to interference between the adjacent cells is realized.

Description

technical field [0001] The present invention relates to communication technology, in particular to a PUSCH power control method and device. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) system uses OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology as the basis for packet data transmission. Interference is too high. [0003] According to whether the transmission power is determined by the sender or the receiver, power control can be divided into two types: open-loop power control and closed-loop power control. The way in which the sender determines its transmit power based on its knowledge of the channel is called open-loop power control. The advantage of open-loop power control is that no additional signaling overhead is required; however, the disadvantage is that the understanding of the channel by the transmitter often deviates from the reality, so open-loop power control based on i...

AI Technical Summary

Problems solved by technology

[0069] It can be seen that the current uplink PUSCH power control does not take into account the influence of interference between adjacent cells, but only considers the fixed interference or the interference measured by the base station itself

The method of power control based on fixed interference is simple, but it cannot adapt to different scenarios

The base station performs power control based on its own measured interference, which does not require exchange of information between base stations. However, due to excessive or small interference from neighboring cells to the local area, the power of the local area is increased or reduced, and the interference to neighboring cells is too large or too small. If the power is too small, the adjacent cell will increase or decrease the power, and then react to the local area, causing a vicious circle, making the system interference unstable, showing a gradual upward or downward trend, and affecting system performance, especially for edge users. bigger

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