Methods, systems, and devices for wireless communications are described. In one example, a user equipment (UE) may be configured to receive a control message scheduling a multicast transmission, and the UE may identify an open loop power control parameter for transmitting acknowledgment feedback responsive to the multicast transmission. The identification of the open loop power control parameter may be based on the transmission being multicast to a plurality of UEs, and in some cases a UE may identify an open loop power control parameter that is different than an open loop power control parameter associated with feedback responsive to unicast transmissions. In various examples, open loop power control parameters may correspond to respective feedback resources (e.g., according to a configuration for a set of open loop power control parameters), or to respective physical resource indicators (e.g., as signaled in downlink control information).

Methods, systems, and devices for wireless communications are described that provide for a transmission of uplink control information (UCI) from a user equipment (UE) to a base station using uplink shared channel resources in the absence of other uplink shared channel data. Based in the UCI and uplink control parameters, the UE may determine an uplink power for transmission of the UCI based at least in part on a spectrum efficiency or a number of bits per resource element (BPRE) for the UCI.

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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source UE, a first sidelink communication. The UE may generate a transmit power control command based at least in part on a signal to interference noise ratio measurement associated with the first sidelink communication. The UE may transmit, to control a transmit power for a second sidelink communication, the transmit power control command to the source UE. Numerous other aspects are provided.

A channel allocation method includes: determining a second channel among idle channels in response to a communication request received from a terminal device over a first channel; and broadcasting a reservation message over the first channel, wherein the reservation message includes second channel information and a reserved communication period, the second channel information is information about the second channel, and the reserved communication period is a time period in which the terminal device is allowed to communicate with the gateway.

Various embodiments include methods that may be implementing in a computing system within vehicles for supporting communicating proxy basic safety communications while operating within a platoon of vehicles to control congestion on frequencies used for basic safety communications. In various embodiments, while a vehicle is operating as a designated platoon vehicle, the computing system may generate a proxy basic safety communication including position and dimension information of the platoon as a whole, and broadcast the proxy basic safety communication on behalf of vehicles in the platoon. The proxy basic safety communication may include positions of certain vehicles within and dimensions of the platoon. While in a platoon but not operating as the designated platoon vehicle, the computing system may not broadcast basic safety communications or broadcast such communications at low power.

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.

In one embodiment, a wireless access point that serves at least one client device in a wireless local area network transmits frames to the at least one client device so that the frames are received by the at least one client device with a receive signal strength so as to control the transmission of probe request messages by the at least one client device.

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.

A method for interference reduction of a user equipment (UE) in a wireless communication system. The method comprises receiving, from a base station (BS), configuration information comprising a set of different transmission parameters for cells of a multi-cell full dimension multi-input multi-output (MC FD-MIMO) system, determining a type of sounding reference signal (SRS) based on the configuration information, and transmitting, to the BS, an SRS based on the configuration information over at least one of a predetermined or a configured multi-cell SRS (MC SRS) resources configured by the BS, wherein the SRS includes a set of SRS sequences.