Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may generate a report for one or more two-step random access channel (RACH) procedures between the UE and a base station (BS), wherein the RACH report includes at least one of an indication of a quantity of message A (MsgA) payloads transmitted during the one or more two-step RACH procedures on each beam of one or more beams associated with the BS, an indication of one or more parameters associated with each MsgA communication transmitted during the one or more two-step RACH procedures, or an indication of whether a respective signal strength for each beam, associated with the one or more two-step RACH procedures, satisfies a signal strength threshold. The UE may transmit the report to the BS. Numerous other aspects are provided.

Disclosed is a method of transmitting an uplink signal by a user equipment in a wireless communication system. The method includes receiving first information related to an uplink (UL) transmission beam, determining a listen-before-talk (LBT) beam based on the first information, and transmitting the uplink signal through the UL transmission beam based on success of LBT based on the LBT beam.

A user equipment communicating with a base station in a wireless communication system including the base station and the user equipment, the user equipment including: a storage unit configured to store correspondence information where an identifier of a beam formed by the base station and configuration information used for transmission of a random access signal are associated with each other; a selection unit configured to select a specific beam on the basis of reception quality of signals transmitted from the base station by using a plurality of different beams and select configuration information corresponding to the specific beam on the basis of the correspondence information; and a transmission unit configured to transmit the random access signal to the base station by using the configuration information selected by the selection unit.

Example embodiments of the present disclosure relate to UP transmission for a device in an inactive state. The first device in an inactive state performs a small data transmission procedure between the first device and a second device and transmits an indication to the second device. The indication indicates the following a presence of non-small data transmission data to be transmitted by the first device and information associated with the data. Through this solution, the second device may make a proper and reasonable determination about whether to resume a radio resource control connection with the terminal device and whether to stop the ongoing small data transmission procedure.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method and a device for reporting system information request-related information in a next-generation mobile communication system are provided.

A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.

A communication method and system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of a user equipment (UE) for performing a random access (RA) procedure is provided. The method includes transmitting a first message including a RA preamble and a UE identifier (ID) to a base station (BS), and receiving a second message including a sequence index of the RA preamble from the BS.

A terminal is disclosed including a processor that starts a timer based on a beam failure instance counter; a receiver that receives a reference signal for identifying a candidate beam; and a transmitter that, if the reference signal has layer 1 reference signal received power (L1-RSRP) exceeding a threshold value before the timer expires, and if there is at least one of contention-free random access (CFRA) resources corresponding to the reference signal, transmits a random access preamble using the at least one of CFRA resources. In other aspects, a radio communication method and a base station are also disclosed.

In a communications system which complies with LTE including a base station which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal, in a case in which an uplink scheduling request signal is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal is transmitted.

A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.