A method is performed by an electronic device that includes antenna modules AM1 and AM2. The method includes: while transmitting or receiving through AM1, receiving a specified wireless signal through AM1 and AM2; identifying a first signal quality for the specified wireless signal of AM1 and a second signal quality for the specified wireless signal of AM2; and in response to determining that a difference between the first signal quality and the second signal quality is within a specified signal quality range and that a rank of a wireless channel through which the specified wireless signal is received is two or more, selecting an antenna module to transmit or receive a wireless signal, from among AM1 and AM2, based on first channel information about AM1 and second channel information about AM2. The method includes transmitting or receiving the wireless signal using the selected antenna module.

The improved beamforming devices for communication systems operating in the mm-wave spectrum are particularly designed for antenna architectures consisting of antenna arrays, comprising multiple antenna array elements. The disclosed approaches comprise intelligent two stage searches, wherein information from the first stage is used in the second stage. This significantly reduces the computational complexity compared to the known approaches, with minimal loss in performance.

A terminal according to an aspect of the present disclosure includes a control section that determines activation or deactivation for a panel, and a transmitting section that transmits a report related to determined activation or deactivation for the panel by including the report in at least one of channel state information and MAC control information (MAC CE).

Embodiments of the present disclosure describe methods, apparatuses, storage media, and systems for adequately measuring reference signals while a user equipment (UE) uses beamforming for optimal receiving. Embodiments describe how a UE may measure received-beamformed reference signals as well as how to determine a reported value while multiple beams are measured or a receiver diversity is in use by the UE. Other embodiments may be described and claimed.

There is provided a method of transmitting and receiving user equipment management information and electronic device for performing the same. The electronic device includes a communication interface including a plurality of phase array antennas, a storage configured to store user equipment (UE) management information including information about at least one frequency band covered by each of the phase array antennas, and a controller configured to control to transmit the UE management information to a base station.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, downlink control information (DCI) associated with transmission configuration information, where the transmission configuration information includes a plurality of indicators of respective reference signals. The UE may communicate, with the base station, based at least in part on the transmission configuration information. The DCI may include a field associated with a transmission configuration indicator (TCI) state that includes the plurality of indicators. As an alternative, the DCI may include at least a first field associated with a first TCI state that includes a first indicator of the plurality of indicators and a second field associated with a second TCI state that includes a second indicator of the plurality of indicators. Numerous other aspects are described.

Aspects are provided which allow a UE to manage a number of antennas in adaptive receive diversity (ARD) based on packet error rate (PER). The UE measures a downlink PER and determines a number of antennas for receiving a downlink transmission based on the measured, downlink PER. The UE measures downlink PER during switching from a fallback state to a steady state in an ARD state machine, and the UE changes a size of a fallback window in the ARD state machine based on the measured, downlink PER. The UE also disables switching from the steady state to the fallback state based on the measured downlink PER. As a result, a balance between UE reception performance and power savings is maximized and improved downlink data throughput is achieved.

Aspects described herein relate to determining one of multiple antenna panels to use to receive downlink beams based on whether a configuration from a base station indicates an antenna panel associated with the downlink beam or in determining a number of repetitions of a downlink beam to receive in beam refinement.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may estimate, for each beam at one or more beam levels on one or more antenna panels, an application layer throughput based at least in part on a reference signal received power measurement, wherein the one or more beam levels are each associated with a number of antenna elements. The UE may generate a set of candidate beams that includes, at each of the one or more beam levels, one or more beams for which the respective estimated application layer throughput satisfies an application layer throughput requirement. The UE may select, from the set of candidate beams, a serving beam for which the estimated application layer throughput satisfies the application layer throughput requirement with a fewest number of antenna elements. Numerous other aspects are described.

This invention is a transmission device capable of enhancing the reception characteristics of a terminal when employing transmit diversity using two antenna ports in an ePDCCH. In a base station (100) that transmits a reference signal to a terminal (200) using two antenna ports, a setting unit (102), on the basis of the reception quality of the terminal, sets as the aforementioned two antenna ports either a first antenna port pair for which DMRS (reference signals) do not undergo mutual code multiplexing, or a second antenna port pair for which the DMRS do undergo code multiplexing. A transmitter (109) transmits the DMRS from the two antenna ports set in the setting unit (102).