This application provides an uplink transmit power determining method and a terminal device. The method includes: receiving, by a terminal device, a broadcast message that is sent by an access network device and that carries first power control information, where the first power control information is used to determine an MCS compensation factor; determining, by the terminal device, the MCS compensation factor based on the first power control information; determining, by the terminal device, a first candidate uplink transmit power based on the MCS compensation factor; determining, by the terminal device, a smaller value in the first candidate uplink transmit power and a second candidate uplink transmit power as a PUSCH transmit power; and sending, by the terminal device, PUSCH information in a random access message based on the PUSCH transmit power.

An apparatus and method for providing control information in a Multi User-Multiple Input Multiple Output (MU-MIMO) wireless communication system is provided. The method includes receiving a plurality of Resource Elements (REs) including Downlink Control Information (DCI), determining, using the DCI, a set of REs to which a plurality of Downlink Reference Signals (DRSs) may be mapped, determining remaining REs as REs to which data is mapped, and demodulating the data using a precoding vector of a DRS corresponding to the MS.

Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.

A method for communication on multiple links is performed by a terminal control device. The method comprises: generating a first message frame; and broadcasting the first message frame on a first link, the first message frame comprising information related to transmission power corresponding to the multiple links.

A method of sidelink transmission can include receiving a physical sidelink shared channel (PSSCH) associated with a first two-stage sidelink control information (SCI) at a first user equipment (UE) from a second UE over a sidelink. The first two-stage SCI indicates a physical layer identity (L1-ID) of the second UE. The method can further include determining based on the L1-ID of the second UE a time-frequency resource for transmitting a physical sidelink feedback channel (PSFCH) carrying a hybrid automatic repeat request (HARQ) feedback corresponding to reception of the PSSCH, and transmitting the PSFCH with the determined time-frequency resource. In an embodiment, transmission of the PSSCH from the second UE is a groupcast transmission or a unicast transmission.

Provided are a method for performing, by a first device, group cast communication with one or more second devices in a group, and a device for supporting same. The method may comprise the steps of: determining the number of physical sidelink feedback channel (PSFCH) resources associated with a physical sidelink shared channel (PSSCH) resource; on the basis of the number of PSFCH resources and the size of the group, determining a hybrid automatic repeat request (HARQ) feedback option; and transmitting, to the one or more second devices, information associated with the HARQ feedback option. Here, the HARQ feedback option can be any one of a first HARQ feedback option or a second HARQ feedback option.

The invention relates to methods for adjusting the transmit power utilized by a mobile terminal for uplink transmissions, and to methods for adjusting the transmit power used by a mobile terminal for one or more RACH procedures. The invention is also providing apparatus and system for performing these methods, and computer readable media the instructions of which cause the apparatus and system to perform the methods described herein. In order to allow for adjusting the transmit power of uplink transmissions on uplink component carriers, the invention suggests introducing a power scaling for uplink PRACH transmissions performing RACH procedures on an uplink component carrier. The power scaling is proposed on the basis of a prioritization among multiple uplink transmissions or on the basis of the uplink component carriers on which RACH procedures are performed.

The invention relates to power control in groupcast communication between a first communication device (100) and a set of second communication devices (300a, 300b, . . . , 300n). The first communication device (100) obtains received signal qualities from a reporting subset (300a′, 300b′, . . . , 300n′) in the set of second communication devices (300a, 300b, . . . , 300n) and determines at least one path loss value for the reporting subset (300a′, 300b′, . . . , 300n′) based on the one or more obtained received signal qualities. The first communication device (100) may further determine a transmission power value for the groupcast communication based on the at least one path loss value and perform a groupcast communication transmission based on the determined transmission power value. Furthermore, the invention also relates to a second communication device (300), corresponding methods, and a computer program.

Methods, systems, and devices for wireless communications are described. A base station may signal power control parameters per configured grant to enable a user equipment (UE) to adjust a transmit power for an uplink message signaled by the configured grant. For example, the base station may transmit the power control parameters in a group-common downlink message to the UE. Accordingly, based on the power control parameters, the UE may or may not apply the power adjustment to a baseline transmit power initially signaled by the base station. In some cases, the base station may signal two power control parameters for the UE to transmit the uplink message. For example, a first power control parameter may include a transmit power control (TPC) command for transmission of the uplink message, and a second power control parameter may include a power adjustment value for transmission of the uplink message.

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams.