Provided is a terminal which can suitably transmit an uplink signal. In a terminal (100), a PC parameter control unit (104) sets a first power control parameter corresponding to a first service, when a prescribed condition relating to a control channel used for transmission of uplink signal allocation is met, and sets a second power control parameter corresponding to a second service, when the prescribed condition is not met. A transmission unit (109) transmits the uplink signal by using transmission power calculated by using the first power control parameter or the second power control parameter.

A method for operating user equipment (UE) includes generating, by the UE, a transmit precoding matrix indicator (TPMI) list including one or more TPMIs selected from a set of available TPMIs stored at a base station (BS). Data indicative of the TPMI list is transmitted to the BS. An index of the TPMI list is transmitted to the BS. Downlink control information (DCI) is received from the BS including an indication of at least one TPMI from the TPMI list based on the index. Uplink data is transmitted to the BS on a physical uplink shared channel (PUSCH) using the at least one TPMI.

The present disclosure provides a power control method in device to device (D2D) communication and a user equipment for performing the power control method. The method includes computing a power value of device to device (D2D) transmission of a user equipment performing D2D communication in a subframe in a serving cell, based on a power control adjustment state of a Long Term Evolution (LTE) wide area network (WAN) uplink channel of the user equipment and an offset or a ratio indicated by a transmit power control (TPC) command indicated in D2D grant or downlink control information (DCI) format 3/3A.

The present disclosure provides a power control method in device to device (D2D) communication and a user equipment for performing the power control method. The method includes computing a power value of device to device (D2D) transmission of a user equipment performing D2D communication in a subframe in a serving cell, based on a power control adjustment state of a Long Term Evolution (LTE) wide area network (WAN) uplink channel of the user equipment and an offset or a ratio indicated by a transmit power control (TPC) command indicated in D2D grant or downlink control information (DCI) format 3/3A.

A method and an apparatus for controlling uplink transmission power in a wireless communication system are provided. The apparatus receives transmit power command (TPC) monitoring information for receiving a plurality of TPCs for adjusting uplink transmission power for a plurality of serving cells. The apparatus obtains the plurality of TPCs by monitoring a downlink control channel on the basis of the TPC monitoring information.

A wire device receives: configuration parameters of: a primary cell with a primary physical uplink control channel (PUCCH); and a secondary cell with a secondary PUCCH; a transmit power control (TPC) radio network temporary identifier (RNTI); a primary TPC index of the primary PUCCH; and a secondary TPC index of the secondary PUCCH. The wireless device receives a downlink control information (DCI) associated with the TPC RNTI. The secondary TPC index identifies a TPC command in an array of TPC commands in the DCI. The wireless device adjusts a transmission power of the secondary PUCCH based on the TPC command.

In a communication system in which a base station device (1) and a terminal device (2) communicate, there is a provided a terminal device, a method, and an integrated circuit enabling the base station device (1) and the terminal device (2) to conduct transmit power control efficiently. Provided is a terminal device that communicates with a base station device, including a transmission unit that transmits an uplink signal based on a first uplink power control in a case of the information related to the first configuration being configured, and the information related to the second configuration not being configured, and transmits an uplink signal based on a second uplink power control in a case of the information related to the first configuration and the information related to the second configuration both being configured.

Systems and methods are disclosed herein that relate to multi-Transmission/Reception Point (TRP) uplink transmission in a cellular communications system. In one embodiment, a method performed by a wireless communication device comprises receiving, from a network node, a configuration of two Sounding Reference Signal (SRS) resource sets, a first and second SRS resource sets, each comprising one or more SRS resources. The method further comprises receiving, from the network node, downlink control information (DCI) that schedules a physical uplink channel transmission comprising a first part associated to a first SRS resource in the first SRS resource set and a second part associated to a second SRS resource in the second SRS resource set, wherein the first and second SRS resources are indicated in the DCI. The method further comprises transmitting the physical uplink channel transmission in accordance with the DCI.

Disclosed are a method and an apparatus for uplink transmission and reception in a wireless communication system. A method for transmitting an uplink channel according to an embodiment of the present disclosure may comprise the steps of: receiving downlink control information (DCI) from a base station; and transmitting the uplink channel to the base station on the basis of the DCI. N (N is a natural number) transmit power control (TCI) command values may be indicated by the DCI, and transmission power of the uplink channel may be determined on the basis of one of the N TPC command values.

The described apparatus and methods may include a controller configured to determine power required for at least one of a plurality of carriers, and generate at least one of a plurality of power control commands for at least one of the plurality of carriers based on the determination.