The present disclosure relates to a wireless communication system. More specifically, the present disclosure relates to: a method for transmitting a physical random access channel (PRACH) in at least one carrier from among a first carrier group on the basis of a channel sensing result, receiving a random access response (RAR) in at least one carrier from among a second carrier group in response to the transmission of the PRACH, and transmitting a physical uplink shared channel (PUSCH) on the basis of the RAR; and an apparatus therefor.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, from a base station and based at least in part on a triggering event, an indication of a frequency domain indexing configuration for a relative reference point. The user equipment may use at least one of a start of a control resource set or an absolute reference point for the relative reference point based at least in part on the indication of the frequency domain indexing configuration. Numerous other aspects are provided.

Disclosed is an electronic device. In addition, it is possible to implement various embodiment understood through the present disclosure. The electronic device transmits a first signal in a first frequency band including at least one of a synchronization beacon frame, a service discovery frame, or an action frame based on an NAN protocol at a first interval for a series of first durations, and transmits a second signal in a second frequency band including at least one of the synchronization beacon frame, the service discovery frame, or the action frame based on the NAN protocol at a second interval for a series of second durations.

Aspects of the present disclosure provide techniques for dynamically adjusting the access link timing alignment at the integrated access and backhaul (IAB) node. Specifically, features of the present disclosure provide techniques for signaling to one or more child nodes the timing advance and timing offset values associated with each operational mode of the IAB node that may impact the access link timing for the child node (for uplink and/or downlink transmissions). Additionally or alternatively, aspects of the present disclosure identify whether a gap period may be included in order to ensure that the child node has sufficient time to transition between states during the transition period (e.g., from downlink to uplink) when the IAB node dynamically adjusts the access link timing.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may receive a random access channel (RACH) message. The base station may determine, based at least in part on the RACH message, whether the RACH message was transmitted directly to the base station by a user equipment (UE) or whether the RACH message was relayed from the UE to the base station via a millimeter wave repeater. The base station may perform a beam management procedure based at least in part on the determination. Numerous other aspects are provided.

A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE obtains a first timing advance (TA) value of a source BS, and receives a radio resource control (RRC) connection reconfiguration message for a handover from the source BS to a target BS. The UE calculates a receiving time difference between a receiving time of two synchronization signals respectively transmitted by the source BS and the target BS, and calculates a reference time difference according to first reference time information of the source BS and second reference time information of the target BS. The UE calculates a second TA value of the target BS based on the first TA value, the receiving time difference and the reference time difference.

An electronic device according to various embodiments of the present disclosure includes: a first communication circuit; a second communication circuit; a processor operatively coupled with the first communication circuit and the second communication circuit; and a memory operatively coupled with the processor. The memory may store instructions, when executed, causing the processor to receive from a base station (BS) a synchronization signal including identification information of the BS via the first communication circuit, identify a direction from the electronic device to the BS by transmitting and receiving at least one signal with respect to the BS via the second communication circuit based on the identification information of the BS, and perform beam training by using some beams corresponding to the identified direction among a plurality of beams supported by the electronic device. Other embodiments are also possible.

Aspects described herein relate to determining that a time division is for receiving a synchronization signal block (SSB) and for a random access occasion (RO) for transmitting a random access preamble in full duplex (FD) communications, and based on the determining, at least one of receiving the SSB or transmitting the random access preamble in the RO during the time division.

Subcarrier spacing (SCS) for data may be adapted or dynamically configured based on the occurrence or presence of a synchronization signal block (SSB) transmission. For example, during a SSB transmission, the SCS of data may be automatically switched from some default data SCS to a second SCS (e.g., the SCS of the SSB) to allow for frequency division multiplexing (FDM) of data and SSB where the data and SSB use the same numerology. As such, communicating devices (e.g., a base station and a user equipment (UE)) may identify some location or configuration for a SSB, and may determine a second subcarrier spacing (e.g., a subcarrier spacing associated with the SSB) such that the SCS of data may be adapted to the second subcarrier spacing during the FDM of the SSB and the data. The SSB and data may thus be contemporaneously transmitted or received using the second SCS.

A method implemented by a device includes determining a direction of a first signal received from a signal source, beamforming a second signal in accordance with a first beamforming gain of a transmission of the second signal oriented in accordance with the direction of the first signal source, and a second beamforming gain of the transmission of the second signal oriented in accordance with an intended direction of the second signal, the first beamforming gain being smaller than the second beamforming gain, and transmitting, by the device, the beamformed second signal.