Apparatuses, methods, and systems are disclosed for channel state information report coefficients. One method (700) includes receiving (702), at a user equipment, a set of reference signals. The method (700) includes identifying (704) a set of ports based on the set of reference signals. The method (700) includes selecting (706) a subset of ports from the set of ports. The method (700) includes computing (708) a subset of coefficients corresponding to a set of indices for each reference signal in the set of reference signals. The method (700) includes generating (710) a channel state information report comprising the subset of coefficients corresponding to the set of indices for each port in the subset of ports.

Aspects described herein relate to determining a condition related to at least one of a thermal condition at the first device or receiving, at the first device, rate or diversity parameters reported to the first device by a second device, modifying, based on determining the condition, a configuration of a set of antenna elements from at least one antenna panel to use in wireless communication, and communicating with one or more devices using the modified configuration of the set of antenna elements from the at least one antenna panel.

A method for enhancing receiving signal power at a receiver is provided. The method includes estimating a channel gain by transmitting a pilot signal to the receiver through each antenna from a plurality of antennas of a transmitter and an IRS, determining an antenna selection metric based on the channel gain in transmitting the pilot signal to the receiver through each antenna of the transmitter and the IRS, identifying an antenna from the plurality of antennas that causes to provide the largest antenna selection metric, determining a reflection coefficient for each reflector of the IRS based on the identified antenna, configuring the reflectors of the IRS with the reflection coefficient, and transmitting the signal to the receiver through the identified antenna and the configured reflectors.

Systems, methods, and computer-readable media herein dynamically adjust the number of elements active within a neighboring base station in order to reduce the back lobe overlap and thus reduce the interference caused by such an overlap. User devices assigned to communicate with an antenna array are monitored to determine if they are experiencing a decreased level of performance which may be caused by an overlapping back lobe from a neighboring cell site. If the user device's performance falls below a threshold value, the gain associated with the neighboring cell site is dynamically reduced in order to reduce the back lobe overlap.

Apparatuses, systems, and methods for user equipment device (UE) uplink antenna panel selection. The UE may determine, based on at least one condition, to perform a beam switch from a current beam being used for communications with a base station. The UE may transmit, to the base station, an indication of an antenna panel status that may include an indication of a latency associated with the beam switch. The UE may receive, from the base station, an indication to switch to a target beam and to perform the switch, based on the indication, to the target beam. The indication of the antenna panel status may include a beam switching latency level for each beam in a beam report, a beam switch request that may indicate the target beam, and/or a beam switch request that may indicate that an antenna panel switch is to be applied by the UE.

An example method for wireless communication includes: transmitting to a base station, via a user device: (1) a capability report for each of a plurality of antenna panels; and (2) an initial antenna panel index; receiving, from the base station, configuration information corresponding to each antenna panel of the plurality of antenna panels; selecting a first antenna panel for a first uplink (UL) transmission to the base station, wherein the first antenna panel corresponds to the antenna panel with the initial antenna panel index; selecting first configuration information corresponding to the selected first antenna panel; and transmitting the first UL transmission to the base station, using the selected first antenna panel and the selected first configuration information. In other aspects, rather than initially receiving configuration information corresponding to each antenna panel, the user device may receive the configuration information for each panel as it is selected for an UL transmission.

Certain aspects of the present disclosure relate to communication systems, and more particularly, to improving performance for sounding reference signal (SRS) antenna switching in carrier aggregation (CA). A method is provided, that may be performed by a user equipment (UE) for wireless communications. The method includes determining one or more band combinations that share an antenna switch and sending a list of one or more bands in the one or more band combinations to a base station (BS). The BS receives the list and schedules the UE based on the received list.

Disclosed are a method and device for transmitting and receiving sounding reference signal in a wireless communication system. A method for transmitting a physical uplink shared channel (PUSCH) according to an embodiment of the present disclosure may comprise the steps of: transmitting, to a base station, terminal capability information related to antenna switching; receiving configuration information related to an SRS from the base station; and transmitting the SRS to the base station to the basis of the configuration information. The configuration information may include information about a plurality of SRS resource sets, the usage of which has been set to antenna switching, and antenna port information about the plurality of SRS resource sets.

A method and apparatus for determining a vertical beam for reception are disclosed herein. A method in a wireless transmit/receive unit (WTRU) includes that the WTRU may receive a broadcast message from an evolved Node B (eNB) that includes information associated with a plurality of beam reference signals, wherein the information includes at least one set of Physical Random Access Control Channel (PRACH) resources associated with each of the plurality of beam reference signals. Further, the WTRU may measure reference signals transmitted on each of the plurality of beam reference signals. Then, the WTRU may select a beam reference signal from among the plurality of beam reference signals. In addition, the WTRU may transmit a PRACH preamble in a set of resources associated with the selected beam reference signal. The WTRU may then receive further communications from the eNB.

This communication device relays a relay signal to be transmitted to and from a first communication device and a second communication device, and is connected to a first apparatus. The communication device transmits the relay signal using a first transmission slot, and also transmits, using a second transmission slot, a signal having been transmitted from the first apparatus, said signal being transmitted within the transmission period of the first transmission slot in a frequency domain different from that of the first transmission slot.