A method (200, 300, 400) in a terminal device, comprising: determining whether a first transmit power control configuration based on a first uplink transmission is outdated when a second uplink transmission is scheduled using an uplink grant by a network device, wherein determining whether the first transmit power control configuration is outdated comprises: initiating a first timer with a preconfigured value when the first uplink transmission is transmitted; and determining that the first transmit power control configuration is outdated when the first timer expires before the second uplink transmission is scheduled; restarting the first timer when the second uplink transmission is scheduled before the first timer expires; in response to determining whether the first transmit power control configuration is outdated, determining to perform power control according to a second transmit power control configuration for the second uplink transmission based on a power control scheme; wherein the second transmit power control configuration is determined based on a close loop power control scheme when the first transmit power control configuration is not outdated; and the second transmit power control configuration is determined based on an open loop power control scheme when the first transmit power control configuration is outdated. determining whether a first transmit power control configuration based on a first uplink transmission is outdated when a second uplink transmission is scheduled using an uplink grant by a network device, wherein determining whether the first transmit power control configuration is outdated comprises: initiating a first timer with a preconfigured value when the first uplink transmission is transmitted; and determining that the first transmit power control configuration is outdated when the first timer expires before the second uplink transmission is scheduled; restarting the first timer when the second uplink transmission is scheduled before the first timer expires; in response to determining whether the first transmit power control configuration is outdated, determining to perform power control according to a second transmit power control configuration for the second uplink transmission based on a power control scheme; initiating a first timer with a preconfigured value when the first uplink transmission is transmitted; and determining that the first transmit power control configuration is outdated when the first timer expires before the second uplink transmission is scheduled; restarting the first timer when the second uplink transmission is scheduled before the first timer expires; in response to determining whether the first transmit power control configuration is outdated, determining to perform power control according to a second transmit power control configuration for the second uplink transmission based on a power control scheme; wherein the second transmit power control configuration is determined based on a close loop power control scheme when the first transmit power control configuration is not outdated; and the second transmit power control configuration is determined based on an open loop power control scheme when the first transmit power control configuration is outdated. the second transmit power control configuration is determined based on a close loop power control scheme when the first transmit power control configuration is not outdated; and the second transmit power control configuration is determined based on an open loop power control scheme when the first transmit power control configuration is outdated.