Aspects provide a mechanism for activating a secondary serving cell (SCell) in a wireless communication network supporting a multi-cell transmission environment. In some examples, a scheduled entity (e.g., a UE) in a connected mode with a primary serving cell (PCell) may synchronize with the SCell to activate the SCell for multi-cell communication with the PCell and the SCell. To enable synchronization with the SCell, the PCell may trigger communication and processing of one or more reference signals between the scheduled entity and the SCell.

This specification provides a method of performing a bandwidth part (BWP) operation in a wireless communication system. Specifically, The method performed by a terminal includes receiving a first message including information related to at least one initial BWP configuration from a network, receiving a second message including configuration information for an additional BWP from the network, receiving downlink control information (DCI) related to BWP switching for at least one configured BWP from the network, and transmitting and receiving signals to and from the network in an activated BWP based on the received DCI.

Embodiments of a User Equipment (UE), Generation Node-B (gNB) and methods of communication are disclosed herein. The UE may attempt to decode sidelink synchronization signals (SLSSs) received on component carriers (CCs) of a carrier aggregation. In one configuration, synchronization resources for SLSS transmissions may be aligned across the CCs at subframe boundaries in time, restricted to a portion of the CCs, and restricted to a same sub-frame. The UE may, for multiple CCs, determine a priority level for the CC based on indicators in the SLSSs received on the CC. The UE may select, from the CCs on which one or more SLSSs are decoded, the CC for which the determined priority level is highest. The UE may determine a reference timing for sidelink communication based on the one or more SLSSs received on the selected CC.

Disclosed is a bandwidth part (BWP) switching method, a terminal, and a storage medium. The method includes: receiving target downlink control information (DCI) from a network device; wherein the target DCI comprises a first BWP, and the target DCI is configured to trigger the terminal to perform a BWP switching; de-enabling a timer-based BWP switching function according to the target DCI; wherein the timer-based BWP switching function indicates triggering the terminal to perform the BWP switching in response to no data transmission existing between the terminal and the network device within a timer duration of a timer; and switching a current BWP to the first BWP.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may generate a buffer status report (BSR) in response to a data radio bearer (DRB) for a secondary cell group (SCG) being a split DRB, the SCG being deactivated, and a buffer size satisfying a threshold for transmitting the BSR to activate the SCG. The UE may transmit the BSR. The UE may communicate on the SCG after activation of the SCG. Numerous other aspects are described.

A terminal includes a reception unit that receives configuration information in a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a control unit that configures at least one of a format of a random access preamble, a sequence of the random access preamble, or a subcarrier spacing applied to a channel on which the random access preamble is to be transmitted, wherein the at least one of the format, the sequence, or the subcarrier spacing is associated with an index included in the configuration information.

Disclosed are channel monitoring and a control method and apparatus thereof, for achieving an adaptive Physical Downlink Control Channel (PDCCH) monitoring solution, achieving adaptive adjustment of PDCCH monitoring according to a service condition of a terminal, and achieving an effect of power saving of the terminal. The channel monitoring control method provided in the present application comprises: determining PDCCH monitoring solution instruction information; and sending the PDCCH monitoring solution instruction information to the terminal for instructing the terminal to adjust the PDCCH monitoring solution.

Embodiments of this application provide a communication method, a communication apparatus, and a readable storage medium. One example method includes: A network device sends a configuration information set to a terminal device, receives assistance information from the terminal device, and determines target frequency domain information from frequency domain information based on the assistance information.

A wireless communication method includes receiving, by a terminal device, first information sent by a network device. The first information includes a first offset. The first offset is a difference between a frame number of a first system frame and a frame number of a first direct frame. The first system frame and the first direct frame overlap in a time domain. The wireless communication method also includes determining, by the terminal device, the first direct frame based on at least one of the first offset or the frame number of the first system frame.

A communication apparatus determines a serving cell that can perform information synchronization with a to-be-activated SCell, where the serving cell is an activated cell or a known cell. The communication apparatus determines a first SSB in SSBs sent by the to-be-activated SCell, where the first SSB corresponds to a second SSB sent by the serving cell. The communication apparatus activates the to-be-activated SCell based on the first SSB sent by the to-be-activated SCell and timing information and beam information of the second SSB.