Embodiments of the present disclosure relate to random access in a communication system. A first device determines whether a contention-free random access resource is allocated from a second device for a first random access type. In accordance with a determination that the contention-free random access resource is allocated, the first device compares a target transport block size corresponding to the contention-free random access resource with a first transport block size configured for a first group of preambles available for the first random access type, and performs random access to the second device based on a result of the comparison.

A terminal includes a receiving unit that receives configuration information for transmitting a random access preamble; and a control unit that configures, when a two-step random access procedure is applied, a time domain resource specified by an index for the two-step random access procedure included in the configuration information, as a time domain resource for transmitting the random access preamble.

A terminal includes a receiving unit that receives configuration information for transmitting a random access preamble; and a control unit that configures, when a two-step random access procedure is applied, a time domain resource specified by an index for the two-step random access procedure included in the configuration information, as a time domain resource for transmitting the random access preamble.

Apparatuses and methods for uplink timing adjustment in a wireless communication system. A method for operating a user equipment (UE) includes receiving a first uplink (UL) timing advance (TA) command for a first link associated with a first physical cell identity (PCI); receiving a second UL TA command for a second link associated with a second PCI; and determining, based on the first and second UL TA commands, first and second UL timing adjustments for the first and second links associated with the first and second PCIs, respectively. The method further includes transmitting a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a sounding reference signal (SRS) associated with the first PCI according to the first UL timing adjustment; and transmitting a PUCCH, a PUSCH, or a SRS associated with the second PCI according to the second UL timing adjustment. The second PCI is different from a serving cell PCI.

A method of transmitting and receiving a signal for a random access channel (RACH) procedure by a user equipment (UE) in a wireless communication system is disclosed. The method includes transmitting a message A including a physical random access channel (PRACH) and a physical uplink shared channel (PUSCH), and receiving a message B related to contention resolution in response to the message A. Transmission power for a retransmission of the message A is configured based on that a counter value related to the transmission power is incremented or maintained, the counter value is maintained based on that a transmission spatial filter related to the PRACH is changed for the retransmission of the message A, and the counter value is used for configuring the transmission power based on that the PRACH and the PUSCH are transmitted via the message A.

The present application is at least directed to an apparatus in a network including a non-transitory memory including instructions stored thereon for obtaining a resource for accessing a target cell in the network. The apparatus includes a processor, operably coupled to the non-transitory memory, configured to execute the instructions of detecting plural beams associated with the target cell. The processor also executes the instructions of determining one or more of the plural detected beams meeting a threshold for performing random access. The processor also executes the instructions of evaluating if a physical random access channel (PRACH) resource is associated with the one or more determined beams meeting the threshold. The processor further executes the instructions of selecting one of the evaluated beams exhibiting a reference signal received power (RSRP) above a predetermined value. The processor even further executes the instructions of picking the PRACH resource associated with the selected beam.

The present disclosure provides a method and a device in a communication node for wireless communications. A communication node receives first information; determines a target measurement interval, the target measurement interval is one of X candidate measurement intervals; transmits a first signal, the first signal occupies a target time-frequency resource block; monitors a first-type signaling in a target time window; the X candidate measurement intervals respectively correspond to X time interval lengths, and the first information is used to determine a corresponding time interval length for each of the X candidate measurement intervals; a length of a time interval between a start time of the target time window and a reference time is equal to a target time interval length, the target time interval length is a time interval length corresponding to the target measurement interval in the X time interval lengths. The present disclosure improves random access performance.

The present invention discloses an uplink data transmission method, a terminal device, and a network device. The method includes: sending, by a terminal device to a network device, information used to request a grant-free transmission resource; receiving, by the terminal device, resource indication information sent by the network device, where the resource indication information is used to indicate a grant-free transmission resource that is allocated by the network device to the terminal device according to the information used to request the grant-free transmission resource; and determining, by the terminal device according to the resource indication information, the transmission resource used for performing grant-free transmission. According to the uplink data transmission method, the terminal device, and the network device in embodiments of the present invention, contention-based uplink data transmission can be implemented, and data transmission efficiency of a system can be improved.

A method of quality of experience (QoE) measurement and reporting, includes receiving, by a user equipment (UE), a radio resource control (RRC) message comprising configuration parameters of one or more QoE configurations; receiving an RRC release message indicating transitioning of the UE from an RRC connected state to an RRC inactive state; performing QoE measurements for at least one first QoE configuration of the one or more QoE configurations, while the UE is in the RRC inactive state; determining to transition from the RRC inactive state to the RRC connected state; and transmitting one or more QoE measurement reports in response to the determining to transition.

A method of quality of experience (QoE) measurement and reporting, includes receiving, by a user equipment (UE), a radio resource control (RRC) message comprising configuration parameters of one or more QoE configurations; receiving an RRC release message indicating transitioning of the UE from an RRC connected state to an RRC inactive state; performing QoE measurements for at least one first QoE configuration of the one or more QoE configurations, while the UE is in the RRC inactive state; determining to transition from the RRC inactive state to the RRC connected state; and transmitting one or more QoE measurement reports in response to the determining to transition.