Power control method and device of physical uplink control channel

Abstract

The application provides a power control method and device of a physical uplink control channel (PUCCH). The method specifically comprises the following steps of: receiving uplink data including uplink detection reference signals and PUCCH channel data; estimating timing deviation of the PUCCH channel data according to the uplink detection reference signals; processing the PUCCH channel data to obtain a corresponding signal-to-noise ratio measurement value; compensating the signal-to-noise ratio measurement value according to a mapping relationship between the energy leakage percentage of a time domain diameter and the timing deviation of the PUCCH channel data and preset timing deviation in a PUCCH channel environment to obtain a non-leakage signal-to-noise ratio corresponding to the signal-to-noise ratio measurement value; and performing close loop power control on the PUCCH channel according to the non-leakage signal-to-noise ratio corresponding to the signal-to-noise ratio measurement value. The power control method and device can improve the precision of the close loop power control of the PUCCH channel.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular to a power control method and device for a physical uplink control channel. Background technique [0002] In the LTE (Long Term Evolution) system, in order to exchange data between the base station and the UE (User Equipment, User Equipment), uplink power control is used to control the transmit power of the uplink physical channel, which is in business reliability and The aspect of UE power consumption is very important. In uplink transmission, if the transmission power is too weak, the base station cannot receive the UE's transmission signal; on the contrary, if the transmission power is too strong, the transmission signal may become the interference of another UE's transmission signal, and may increase the UE's Battery wear. Wherein, PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) is a kind of uplink physical channel. [0003] Cur...

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Problems solved by technology

[0006] Since PUCCH only occupies one RB (Radio Bear), it is a narrowband signal and is greatly affected by timing deviation. A slight timing deviation will easily cause the power of the signal path to leak to the noise path, resulting in a low signal power measurement value. , and the noise power measurement value is too high, resulting in the final SNR measurement value being smaller than the actual value, resulting in low precision of the closed-loop power control of the PUCCH channel

[0007] However, according to the closed-loop power control scheme of the prior art, when the measured SNR value is too small, it is easy to notify the UE to send the PUCCH channel signal with higher than expected power; thus, when scheduling multiple users on one RB, it is easy to bring Interference between multiple users from PUCCH causes SR (Schedule Request, Schedule Request) false detection to be too high, which affects the uplink rate and may increase the battery consumption of the UE

[0008] In addition, if the power of the PUCCH channel is too large, it will also cause interference to the PUSCH (Physical Uplink Shared Channel) channel of other users of adjacent RBs, affecting the demodulation quality

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