Implementations of the present application relate to the field of communications, and provide a data transmission method and device, and a system. The method comprises: a terminal transmits data using first power in a first area, and transmits data using second power in a second area, wherein the first area and the second area are distinguished by transmission resources.

Wireless communications for a plurality of cell groups are described. Uplink transmissions, such as uplink transport blocks, hybrid automatic repeat request (HARQ) transmission, and/or channel state information transmission, may be based on one or more time alignment timers associated with a cell group.

In accordance with various embodiments, an electron beam evaporator can comprise the following: a tubular target; an electron beam gun for producing at least one vapor source on a removal surface of the tubular target by means of an electron beam; wherein the removal surface is a ring-shaped axial end surface or a surface of the tubular target that extends conically or in a curved fashion from the free end edge.

There is provided a power headroom report method, a configuring method, a power control method, a data transmission method, a terminal, a base station and an apparatus of the same. The data transmission method may include: acquiring configuration information for uplink or downlink data transmission; determining whether a front loaded reference signal is transmitted according to the acquired configuration information; in response to determining that the reference signal is transmitted, transmitting the reference signal before the data transmission or at the same time when the data transmission starts and performing uplink data transmission or downlink data reception; and in response to determining that the reference signal is not transmitted, directly performing the uplink data transmission or the downlink data reception.

Certain aspects of the present disclosure provide techniques and apparatus for determining a transmit power based on a pattern and/or future conditions for a transmission while maintaining radio frequency (RF) exposure compliance. An example method generally includes obtaining a pattern associated with one or more first transmissions, determining a transmit power for one or more second transmissions based at least in part on the pattern and an RF exposure limit, and transmitting the one or more second transmissions at the determined transmit power.

Embodiments of a network node for a cellular communications network are disclosed. In some embodiments, the network node comprises a radio interface and processing circuitry operable to configure a wireless device to measure Reference Signal Received Power (RSRP) for both a serving cell of the wireless device and one or more neighbor cells of the wireless device, receive resulting reporting information from the wireless device, adjust a target receive power for the wireless device based on the reporting information, determine a power correction for the wireless device based on the adjusted target receive power for the wireless device, and signal the power correction to the wireless device. Embodiments of a method of operation of a network node as well as embodiments of a wireless device and a method of operation thereof are also disclosed.

Wireless communications may be used to support transmission power control. A reference signal may be mapped to a power control parameter set. A message to schedule a transmission may be received that indicates the power control parameter set. A transmission power for the scheduled transmission may be determined based on the reference signal.

A method for transmitting an uplink physical channel in a wireless communication system and a device supporting the same are disclosed. More specifically, the method performed by a user equipment (UE) includes receiving, from a base station, transmission power related information via higher layer signaling, receiving a physical downlink control channel from the base station, and transmitting the uplink physical channel to the base station based on the physical downlink control channel, wherein the uplink physical channel includes a first uplink physical channel or a second uplink physical channel, wherein transmission powers for the first uplink physical channel and the second uplink physical channel are respectively calculated by different power related parameters determined based on the transmission power related information and the physical downlink control channel.

Apparatus, methods, and computer-readable media for facilitating UE beam selection based on service demands are disclosed herein. An example method of wireless communication includes determining to select an UL beam having a higher EIRP capability than an EIRP capability associated with a current beam for transmitting on UL when at least one of a target transmit power based on a TPC exceeds an EIRP capability associated with the current beam or when an amount of data in a buffer of the UE is greater than a data threshold. The example method also includes determining, upon determining to select the UL beam, a set of UL beams with an EIRP capability satisfying an EIRP capability threshold and a respective beamforming direction corresponding to a beamforming direction associated with the current beam, selecting one UL beam of the set of UL beams, and transmitting on UL on the selected UL beam.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a power headroom (PHR) value for a component carrier (CC) based at least in part on a physical uplink shared channel (PUSCH) transmission in the CC, wherein the PUSCH transmission includes a first repetition associated with a first set of power control parameters and a second repetition associated with a second set of power control parameters, and wherein the PHR value is determined based at least in part on one or more of the first repetition or the second repetition. The UE may transmit information identifying the PHR value for the CC. Numerous other aspects are provided.