A terminal includes a control unit that selects a transmission occasion to transmit a random access preamble and that configures a frequency bandwidth used for transmission or reception by the terminal by using a start position of a frequency bandwidth of the selected transmission occasion or a center position of the frequency bandwidth of the selected transmission occasion as a reference, so that the random access preamble is to be transmitted in the frequency bandwidth of the transmission occasion; and a transmission unit that transmits the random access preamble based on the frequency bandwidth configured by the control unit.

Systems, methods, and apparatuses for cross division duplex (XDD) operation in a wireless communication system are described herein. A user equipment (UE) is configured with one or more sub-bands (SBs) within a larger overall bandwidth (BW) (e.g., represented by a component carrier (CC), a bandwidth part (BWP), etc.), and that use uplink (UL)/downlink (DL) resource allocation(s) that may be different than the larger BW. Configurations for such SB-specific (SBS) arrangements that use guard bands (GBs) between SBs are discussed. Mechanisms for slot format indications (SFIs) within such SBs using either SBS DCI or cross-SB DCI are discussed. Mechanisms for providing SBS uplink resource for initial access (e.g., random access) using at least one initial UL BWP that is configured relative to one or more SBs and that may be used by XDD-capable UEs are discussed.

A wireless communication system includes a first terminal and a routing device. The routing device is configured to perform channel availability check (CAC) before performing communication on a 5 gigahertz (GHz) channel of a first frequency bandwidth, and broadcast a beacon frame on the 5 GHz channel of the first frequency bandwidth when the routing device does not detect a radar signal. The routing device is configured to operate on the 5 GHz channel of the first frequency bandwidth, and the first frequency bandwidth includes a dynamic frequency selection DFS channel. The first terminal is configured to perform communication on the 5 GHz channel of the first frequency bandwidth when the first terminal is configured to operate on the 5 GHz channel of the first frequency bandwidth and receives the beacon frame on the DFS channel.

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device, where a COT initiated by the network device and a COT initiated by the terminal device can reasonably coexist on an unlicensed spectrum. The wireless communication method includes: the terminal device determining a first periodic channel occupancy, the first periodic channel occupancy being a channel occupancy for the terminal device to perform initiation, the first periodic channel occupancy including a first channel occupancy; the terminal device initiating the first channel occupancy, or, the terminal device determining whether to initiate the first channel occupancy.

An open radio access network (O-RAN) may include a control unit that communicates with a core network, a distributed unit that communicates with the control unit, a radio unit that communicates with the distributed unit and a user equipment (UE). Currently, the O-RAN may lack support for static configuration for a physical uplink shared channel (PUSCH) communication of message-A in a third generation partnership project (3GPP) two-step random access procedure. Hence, according to some aspects of the disclosure, the distributed unit may receive, from a radio unit, a static configuration support indication for receiving payload data via a message in a two-step random access procedure, the message including a preamble and the payload data. The distributed unit may further transmit, in response to receiving the static configuration support indication, static configuration information to the radio unit, the static configuration information for receiving the payload data communicated via the message.

Techniques for indicating system information block or paging waveforms for future communications may include a user equipment (UE) configured to identify a waveform configuration of a downlink (DL) signal including system information to be received from a base station during a random access channel (RACH) procedure in response to an indication of the waveform configuration of the DL signal. The UE may also be configured to receive, from the base station, the system information in response to the waveform configuration of the DL signal being identified.

Example random access methods and apparatuses are provided. One example method includes: receiving SUL configuration information, where the SUL configuration information includes at least one first SUL resource and at least one SUL selection threshold that are corresponding to a first SSB; determining, based on a downlink measurement value of the first SSB and the at least one SUL selection threshold, a carrier resource used for random access, where the carrier resource includes one of the at least one first SUL resource or includes a non-SUL resource corresponding to the first SSB; and performing random access on the determined carrier resource.

A wireless device receives configuration parameters of a first bandwidth part (BWP) and a second BWP of an unlicensed cell. A first contention window is determined for a first listen before talk (LBT) procedure for a first channel of the first BWP. Based on switching from the first BWP to the second BWP, a second contention window is determined to be a minimum contention window, of a plurality of contention windows, for a second LBT procedure of a second channel of the second BWP. A transport block is transmitted, via the second BWP, based on the second LBT procedure using the second contention window.

Disclosed is a method for transmitting and receiving signals to enable a terminal to perform a random access channel procedure (RACH procedure) in an unlicensed band. In particular, the method comprises: transmitting an uplink signal including a first physical random access channel (PRACH) and a first physical uplink shared channel (PUSCH) to a base station; and receiving, from the base station, a downlink signal related to contention resolution in response to the uplink signal, wherein a power ramping counter is used to set the transmission power of the uplink signal, and the value of the power ramping counter may be increased on the basis of a transmission spatial beam for the transmission of the uplink signal being configured in the same manner as a transmission spatial beam for the transmission of a PRACH prior to the uplink signal.

A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving, by a terminal from a base station, a System Information Block1, determining, by the terminal, a preamble format and a subframe and a starting symbol based on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon and transmitting, by the terminal, the preamble based at least in part on the preamble format and the subframe and the starting symbol.