Systems, devices, and techniques for transmit power control (TPC) in wireless communication systems are described. A described technique performed by a user equipment (UE) includes receiving downlink control information (DCI) messages corresponding to respective physical uplink shared channel (PUSCH) transmission occasions; determining power control adjustment states for the PUSCH transmission occasions; and transmitting in the PUSCH transmission occasions in accordance with the power control adjustment states. Determining the power control adjustment states can include selectively applying TPC accumulation. Determining the power control adjustment states can include determining whether a first PUSCH transmission occasion occurs out-of-order with respect to a second PUSCH transmission occasion based on an arrival ordering of the DCI messages, where the first PUSCH transmission occasion occurs before the second PUSCH transmission occasion.

A user equipment (UE) receives a parameter indicating a power control loop out of a plurality of power control loops and a first transmit power control (TPC) command. The UE transmit a first uplink physical channel based on the first TPC command and the indicated power control loop. Further, the UE receive a single downlink channel, wherein the single downlink channel carries a channel allocation and a second TPC command for the UE. The UE transmit a second uplink physical channel using resources based on the channel allocation and at a transmission power level based on the second TPC command.

A user terminal according to one aspect of the present disclosure includes: a control section that, in a case where a plurality of Transmission/Reception Points (TRPs) are configured, determines transmit power of uplink transmission based on a cumulative value of Transmit Power Control (TPC) commands calculated per TRP; and a transmitting section that performs the uplink transmission by using the transmit power. According to one aspect of the present disclosure, it is possible to perform appropriate transmit power control even in a case where multiple TRPs are used.

The disclosure relates to converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT, and may be applied to intelligent services based on the 5G communication technology and IoT-related technology. The disclosure provides a method performed by a terminal in a communication system, including receiving, from a base station, configuration information for a PUSCH repetition, identifying a configured time domain window for the PUSCH repetition based on the configuration information, and performing one or more repetitions of PUSCH transmission with the base station in the configured time domain window, wherein power consistency and phase continuity of the PUSCH transmission are maintained in the one or more repetitions, and wherein one or more TPC commands accumulated in the configured time domain window are applied after the configured time domain window.

Apparatuses and methods for power determination for physical uplink control channel transmission with acknowledgement information. A method for operating a user equipment (UE) includes determining a sum of: a first number of received transport blocks (TBs) associated with a first set of radio network temporary identifiers (RNTIs), a second number of received TBs associated with a second set of RNTIs, and a third number of non-received TBs associated with the second set of RNTIs. The method further includes determining a power for a physical uplink control channel (PUCCH) transmission based on the sum and transmitting the PUCCH using the power. The PUCCH includes first hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits associated with the first set of RNTIs and second HARQ-ACK information bits associated with the second set of RNTIs.

Methods and apparatuses for use in a wireless communication. A method includes receiving first information providing first transmit power control (TPC) commands and second information providing a first number of slots for a transmission of a channel. The method further includes determining: a first set and a second set of transmission occasions for the channel over the first number of slots, a first power based on a first power control adjustment state, an accumulated value of the first TPC commands, a second power control adjustment state based on the first power control adjustment state and the accumulated value of the first TPC commands, and a second power based on the second power control adjustment state. The method further includes transmitting the channel with the first power in the transmission occasions of the first set and the second power in the transmission occasions of the second set.

A user terminal of the present invention includes a receiving section that receives a plurality of pieces of downlink control information each including a first field value to be used for control of a transmission power of an uplink control channel and a second field value to be used to determine a resource for the uplink control channel, and a control section that controls, in a case that the same resource is determined based on the second field value, accumulation of a transmission power control (TPC) command indicated by the first field value. With this, it is possible to appropriately control a transmission power of an uplink control channel.

Provided by the present invention are an uplink power control method and apparatus, the method comprising: a UE side acquiring a power control parameter when an uplink channel is transmitted using one TTI length among multiple TTI lengths or an uplink channel is transmitted using one timing among multiple timings; and determining a transmission power of the uplink channel according to the power control parameter, the uplink channel being a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH). Thus, the problem of controlling uplink power using TTIs of different lengths which is present in existing technology may be solved by means of the steps in the present invention.

Transmit power control methods and apparatus are disclosed. In several embodiments, a mobile terminal is configured to effectively ignore “UP” transmit power control commands in the event that the mobile terminal is operating in a power-limited state. In an exemplary method for controlling transmit power at a mobile terminal, a plurality of transmit power control commands are received. An accumulated power control value is adjusted in response to each transmit power control command that directs a negative adjustment in transmit power. However, the accumulated power control value is adjusted in response to a transmit power control command that directs a positive adjustment in transmit power only if the mobile terminal is not in a power-limited state. Transmit power settings for each transmission are calculated based on the accumulated power control value and the one or more radio link parameters.

A user equipment (UE) receives, from a base station, a parameter indicating a power control loop out of a plurality of power control loops. Further, the UE receives a single downlink channel, wherein the single downlink channel carries a channel allocation and a transmit power control (TPC) command for the UE. The UE transmits a shared uplink physical channel using resources based on the channel allocation and at a transmission power level based on the transmit power command and the indicated power control loop.