A path loss calculation method and apparatus for power control. The method includes determining a target transmit power value according to at least one transmit power value used during direct unicast communication with a receiver device; receiving a current target reference signal received power (RSRP) value returned by the receiver device, wherein the target RSRP value is an RSRP value obtained by the receiver device by means of high layer filtering; and determining a target path loss value according to the target transmit power value and the current target RSRP value.

Embodiments provide a user equipment for a wireless communication system. The user equipment is configured to communicate with at least one other user equipment of the wireless communication system using a sidelink resource pool of the wireless communication system. Further, the user equipment is configured to transmit, responsive to an external emergency situation, an emergency notification signal on a resource of the wireless communication system. Thereby, the user equipment is configured to transmit the emergency notification signal with a transmit power that is greater than a regular transmit power used by the user equipment for transmitting regular signals.

A method includes: obtaining, by a first communications device, a first carrier, where the first carrier is used to transmit a first message and a second message; obtaining, by the first communications device, a first transmission resource and a second transmission resource of the first carrier, where the first transmission resource is used to send the first message, the second transmission resource is used to send the second message, and the first transmission resource and the second transmission resource are different transmission resources; sending, by the first communications device, the first message on the first transmission resource by using a first wireless access technology; and sending, by the first communications device, the second message on the second transmission resource by using a second wireless access technology, where the first wireless access technology and the second wireless access technology are different inter-device direct communications technologies.

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 system comprises an infrastructure element including a computer programmed to communicate with a first stationary communication node having a first directional short-wave antenna with a first field of view and a second stationary communication node having a second directional short-wave antenna with a second field of view. The first communication node is located within the second field of view. The computer is programmed to determine a first and a second transmission parameter for the first and second stationary communication node respectively based on received object detection sensor data including object data from a respective field of view of each communication node's directional antenna. Each of the first and second transmission parameters includes a transmission power and/or a data throughput rate. The computer is programmed, based on received communication metrics from the first communication node, to determine a deficiency of the second communication node, and upon determining the deficiency of the second communication node, to actuate the first communication node to provide coverage for the second field of view.

According to an embodiment of the present disclosure, provided is a method for a first device to perform sidelink communication. The method may include the steps of: determining sidelink transmission power, for transmission to a second device, as first transmission power on the basis of an OLPC parameter and at least one parameter pertaining to SL PL; transmitting a first PSCCH or a first PSSCH to the second device on the basis of the first transmission power; determining the sidelink transmission power as second transmission power on the basis of a transmission power control operation for the first transmission power being triggered; and transmitting a second PSCCH or a second PSSCH to the second device on the basis of the second transmission power.

A wireless device may select a power headroom value of a first cell. The power headroom value may be selected from a first power headroom value of an uplink transmission via uplink resources of the first cell, and a second power headroom value of a sidelink transmission via a sidelink resource pool of the first cell. The power headroom value may be selected based on whether the uplink transmission or the sidelink transmission is a scheduled transmission. The wireless device may transmit, based on selecting the power headroom value, a power headroom report comprising the power headroom value of the first cell.

Apparatuses, methods, and systems are disclosed for multiple resource allocation mode configurations. One method includes receiving information indicating a plurality of resource allocation mode configurations. Each resource allocation mode configuration corresponds to a logical channel of a plurality of logical channels. The method includes determining a plurality of data transmission scheduling modes for the plurality of logical channels. Each data transmission scheduling mode corresponds to a logical channel of the plurality of logical channels based a resource allocation mode configuration of the logical channel, and each data transmission scheduling mode comprises: a first scheduling mode; a second scheduling mode different from the first scheduling mode; or a third scheduling mode comprising the first scheduling mode and the second scheduling mode. The method includes transmitting a buffer status report based on the plurality of the data transmission scheduling modes.

User equipments (UEs) and methods for hybrid automatic repeat request acknowledgement (HARQ-ACK) operation in a sidelink. A user equipment configured to receive a physical sidelink control channel (PSCCH) that includes a sidelink control information (SCI) format scheduling a reception of a physical sidelink shared channel (PSSCH) that includes a transport block (TB) and to provide HARQ-ACK information for the TB decoding in a physical sidelink feedback channel (PSFCH).

Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may transmit a message indicating a capability of the UE to support power splitting for signals received at the UE for EH by the UE. In some examples, the UE may transmit, based on the capability of the UE to support power splitting, an indication of a power splitting factor for EH by the UE, the power splitting factor indicating a portion of received power for signals received at the UE to be used for EH. The UE may receive a signal to use for power splitting based at least in part on the capability of the UE to support power splitting for signals received at the UE for EH by the UE and the power splitting factor.