A method of operating a communication device includes: sweeping a plurality of first reception beams; measuring reference signals, received from another communication device, based on the plurality of first reception beams; estimating a downlink channel gain based on the measured reference signals and reception array response information corresponding to reception antenna characteristics of the communication device; generating a downlink channel related matrix based on the downlink channel gain and the reception array response information; determining a second reception beam based on the downlink channel related matrix; determining a transmission beam based on at least one of the downlink channel gain, the downlink channel related matrix, and the second reception beam; and performing communication with the other communication device using the second reception beam and the transmission beam.

The present disclosure relates to a mobile terminal, a base station and respective operation methods. The mobile terminal comprises circuitry, which in operation assumes that a base station is configured to use one of a plurality of transmission beams, receives a downlink control channel candidate and a corresponding demodulation reference signal using one of a plurality of reception beams corresponding to the assumed one of the plurality of transmission beams, performs channel estimation based on the received demodulation reference signal, and, depending on the quality, demodulates the downlink control channel candidate using the channel estimation. The channel estimation is performed using a demodulation reference signal sequence which is generated observing an association which is associating the generated sequence with the assumed one of the plurality of transmission beams such that at least two of the plurality of transmission beams are associated with different demodulation reference signal sequences.

A terminal according to one aspect of the present disclosure includes a receiving section that receives a medium access control-control element (MAC CE) to update a transmission configuration indication (TCI) state, and a control section that, when a configuration related to at least one of a spatial relation and a pathloss reference signal for a specific uplink signal satisfies an application condition, uses the TCI state for the pathloss reference signal from timing after transmission of a positive acknowledgment (ACK) to the MAC CE. According to one aspect of the present disclosure, it is possible to appropriately transmit a UL signal.

The disclosure relates to an electronic device and method for a wireless communication system, and a storage medium. Various embodiments regarding beam management are described. In one embodiment, an electronic device for a terminal device side in a wireless communication system can comprise a processing circuit system. The processing circuit system can be configured to obtain random access configuration information, and send a random access preamble based on the random access configuration information, so as to indicate one or more transmission beams of a base station side, in a downlink, paired with one or more receiving beams at the terminal device side.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a measurement report based at least in part on a set of measurements of one or more reference signals received using a set of candidate beams; transmit a negative acknowledgement for a downlink transmission scheduled for one or more beams of the set of candidate beams; and monitor one or more new beams of the set of candidate beams for a retransmission of the downlink transmission. Numerous other aspects are provided.

Disclosed are a method and a device for transmitting or receiving a signal on the basis of a space parameter in a wireless communication system. A method for performing downlink reception or uplink transmission by a terminal in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of: transmitting information related to a beam switching time of the terminal to a base station; receiving, from the base station, downlink control information (DCI) including information on the downlink reception or the uplink transmission; and on the basis of the beam switching time and a predetermined threshold value, applying one space parameter set among multiple space parameter sets so as to perform the downlink reception or the uplink transmission, wherein at least one of the beam switching time and the predetermined threshold value may be based on at least one of subcarrier spacing, the position of a frequency, a capability of the terminal, and a cyclic prefix (CP)-related configuration.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a parent node in an integrated access and backhaul (IAB) network may transmit, to an IAB node having a mobile termination function (IAB-MT) and a distributed unit (IAB-DU), signaling indicating a set of restricted IAB-DU beams and associating the set of restricted IAB-DU beams with one or more IAB-MT beams, the set of restricted IAB-DU beams determined based on measurements related to interference caused by the IAB-DU and the IAB-MT performing a simultaneous operation in one or more simultaneous multiplexing modes. Additionally or alternatively, the parent node may perform scheduling for the IAB-MT based on signaling received from the IAB node that indicates beam-specific parameters related to a multiplexing capability for a beam pair that includes an IAB-MT beam and an IAB-DU beam associated with the IAB-MT beam. Numerous other aspects are provided.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may be configured with a cross-component carrier or cross-beam quasi co-location (QCL) configuration in a sidelink carrier aggregation configuration. For example, a first beam on a first component carrier may be QCLed with a second beam on a second component carrier. The first beam may have a different beam width than the second beam or be in a different frequency range than the first beam, or both. If an application at the UE requests the UE to configure a beam on the second component carrier, the UE may use some parameters used to receive on the first component carrier to communicate using the second beam on the second component carrier.

Methods and apparatuses for transmission configuration indication (TCI) state indication for control channels in a wireless communication system. A method of operating a user equipment (UE) includes receiving downlink control information (DCI) including at least one TCI codepoint indicating first and second TCI states and receiving an indicator to indicate the first or second TCI state to use for determining a quasi co-location (QCL) assumption for receiving a first physical downlink control channel (PDCCH). The method further includes determining, based on the indicator, the first or second TCI state to use for determining the QCL assumption; determining, based on the determined first or second TCI state, the QCL assumption for receiving the first PDCCH; and receiving, based on the determined QCL assumption, the first PDCCH in a first control resource set (CORESET).

A wireless device receives a report mask indicating a transmission of a layer 1 reference signal received power (L1-RSRP) report limited to a time period when a discontinuous reception (DRX) timer is running. The L1-RSRP report is transmitted, at a first time, in response to the DRX timer running at a predefined time period before the first time. The L1-RSRP report may include, for example, an L1-RSRP value and a reference signal index associated with the L1-RSRP value. Ata second time, a configured L1-RSRP report transmission is skipped in response to: the DRX timer not running at the predefined time period before the second time and the report mask.