The embodiments of the present invention relate to apparatuses and methods for resource management in a multi-carrier system wherein a plurality of component carriers (CCs) is defined per cell. According to a method in an apparatus corresponding to a radio base station, a message is assembled comprising information on the structure of the cell served by the radio base station; the information including one or more CCs used in the cell that is/are available for a user equipment for performing initial access in the cell. The method also comprises, transmitting the assembled message to the user equipment and indicating to the user equipment to what resources to use for random access in the cell. The exemplary embodiments of the present invention also relates to a method in the user equipment, to a radio base station and to a user equipment.

The present disclosure relates to a wireless communication system. Specifically, provided is a method and an apparatus for supporting same, the method comprising the steps of obtaining random access procedure-related message A, message A including a physical random access channel (PRACH) preamble and a physical uplink shared channel (PUSCH); transmitting message A; and receiving random access procedure-related message B as a response to message A, wherein the PUSCH comprises a demodulation reference signal (DM-RS), and PRACH preamble is mapped to (i) one or more DM-RS ports and (ii) one or more DM-RS sequences on the basis of indices of respective (i) one or more DM-RS ports and indices of respective (ii) one or more DM-RS sequences.

A system and method for providing early indications. In some embodiments, the method, includes: indicating, by a User Equipment (UE), as part of an initial access uplink transmission, a characteristic of the UE, the characteristic including at least one of the following: the UE is a reduced-capability UE and has a Msg3 repetition capability, the UE is a reduced-capability UE and lacks a Msg3 repetition capability, the UE is not a reduced-capability UE and has a Msg3 repetition capability, and the UE is not a reduced-capability UE and lacks a Msg3 repetition capability.

In the present invention, disclosed is a method for uplink multi-user transmission in a wireless communication system and an apparatus therefor. Specifically, a method for performing, by a station (STA), uplink (UL) multi-user (MU) transmission in a wireless communication system comprises the steps of: receiving, from an access point (AP), a trigger frame including information for UL MU transmission; and transmitting an UL MU PPDU on the basis of the information for UL MU transmission, wherein the trigger frame is a medium access control (MAC) frame, a MAC header of the trigger frame includes a type field and a subtype field, and the type of the trigger frame may be indicated by the type field and the subtype field.

The present specification proposes a technical feature related to a wake-up radio (WUR) STA. Specifically, proposed is an operation of updating a parameter related to an operation of a WUR mode. For example, the WUR STA may update a parameter related to the WUR mode by receiving an unsolicited frame from an AP while maintaining the WUR mode. The received frame may have a preset action type.

Methods, systems, and devices for transmitting a positioning reference signal over a channel within a window including a set of positioning reference signal transmission opportunities. A device may identify the window and perform a channel access procedure to access the channel during the window. Based on performing the channel access procedure, the device may obtain access to the channel and determine that a portion of the positioning reference signal transmission opportunities are remaining within the window. The device may transmit a positioning reference signal during one or more of the remaining positioning reference signal transmission opportunities. In some cases, the device may refrain from transmitting a positioning reference signal during a portion of a positioning reference signal transmission opportunity even if the device gains access to the channel during that portion of the positioning reference signal transmission opportunity.

Provided are a method for requesting, by a user equipment (UE), system information in a wireless communication system and a device supporting the same. The method may include: initiating a random access procedure; requesting system information from a base station (BS) in the initiated random access procedure; receiving, from the BS, a broadcast indication indicating that the requested system information is broadcast in the initiated random access procedure after requesting the system information from the BS; and stopping the initiated random access procedure.

A method is provided for enabling a User Equipment (102) to access services provided by a Radio Access Network by configuring the User Equipment (UE) with configuration information which comprises rules for selecting one or more of a plurality of access procedures to be used by the UE for accessing services provided by the Radio Access Network which may be a New Radio/5G network (101). Access procedures may include a grant-based procedure; a grant-free procedure and a fallback procedure to be used in cases of failure of an initial access attempt. The rules may be based on the type of service required by the UE such as; transmission and/or reception of data, transmission and/or reception of a voice call, a request for System Information.

The present disclosure provides a method and an apparatus for random access in a wireless communication system, as well as a user terminal. The method includes: receiving indication information transmitted from a radio base station, the indication information instructing a user terminal to initiate a random access; determining a target Physical Random Access Channel (PRACH) resource from available resources based on a current coverage level and resource information carried in the indication information, the target PRACH resource being used for transmitting a PRACH signal for initiating the random access; and re-determining, in response to a failure to initiate the random access over the target PRACH resource, the target PRACH resource from the available resources based on an updated coverage level and the resource information, and transmitting the PRACH signal over the re-determined target PRACH resource. The present disclosure can solve the technical problem in the related art associated with low success rate of random accesses initiated by radio base stations.

According to certain embodiments, a method for use in a network node comprises broadcasting system information to wireless devices. The system information indicates a set of configured random access carriers. The method further comprises selecting, from the set of configured random access carriers, a random access carrier to be used by a wireless device when performing random access transmissions, and indicating the selected random access carrier to the wireless device.