A base station allocates unmanned aerial vehicles (UAVs) preambles for use by UAV user equipment (UE) devices that are different from terrestrial preambles allocated for terrestrial UE devices. The UAV preambles can be allocated to different subscription levels, such that each UAV UE device can only use UAV preambles associated with the UAV UE device's subscription level. The UAV UE device transmits random access request message using the selected UAV preamble and the base station responds with a random access response message indicating whether access is granted to the UAV UE device. The base station can dynamically manage access to the base station by limiting the subscription levels that are associated with the UAV preambles.

A communication apparatus performs communication while suppressing an increase in power consumption. The communication apparatus includes a periodic signal generating unit, a clocking unit, a multiplication unit, and a communication processing unit. The periodic signal generating unit generates a predetermined periodic signal. The clocking unit clocks time in synchronization with the predetermined periodic signal generated by a frequency signal generating unit. The multiplication unit multiplies the predetermined periodic signal generated by the frequency signal generating unit to supply the signal as a multiplied signal. The communication processing unit performs predetermined communication processing in synchronization with the multiplied signal generated by the multiplication unit.

Apparatuses, methods, and systems are disclosed for performing multiple random access procedures. One apparatus (200) includes a processor (202) that: determines (402) that multiple random access procedures are triggered; and performs (404) the multiple random access procedures in parallel, selects a prioritized random access procedure of the multiple random access procedures to perform based on a priority corresponding to the multiple random access procedures, or some combination thereof.

The present disclosure relates to a user equipment (UE) that comprises a receiver of the UE receives, from a source base station of a source radio cell, a common timing advance value for a target radio cell. The UE is connected to the source radio cell and is involved in a handover procedure to hand over the UE from the source radio cell to the target radio cell. Further, the common timing advance value is received from the source base station in a first message of the handover procedure, which also comprises a timing indication for transmitting a second message from the UE to the target base station. Then, a processor of the UE determines a first uplink timing of uplink transmissions to the target base station with respect to downlink transmissions from the target base station, based on the received common timing advance value and the timing indication. A transmitter of the UE transmits a second message of the handover procedure to the target base station based on the determined uplink timing. The processor determines a UE-specific timing advance value, specific to the UE and the target radio cell, to be used by the UE for performing uplink transmissions in the target radio cell.

When spatial quasi co-location is established between component carriers, beam management, e.g., beam configuration or reference signal configuration, of one component carrier may be performed based at least in part on beam management information of the other. Information specifying that component carriers or reference signals cross component carriers are spatially quasi co-located, or information about a SQCL group including spatially quasi co-located carriers, may be transmitted to a UE, e.g., using broadcast signaling, radio resource control (RRC) signaling, a media access control-control element (MAC-CE), downlink control information (DCI) signaling, or a combination thereof.

A radio resource control message comprising an indication of a random access channel preamble, a reference signal resource, or both can be received. A reference signal can be received on the reference signal resource. A random access channel preamble can be selected based at least in part on the reference signal satisfying a threshold. The selected random access channel preamble can be transmitted during a random access procedure.

Synchronization signal numerology of a communications system is determined, on the basis of at least two reference numerologies. Time occasions comprising including synchronization signals are determined on the basis of a first reference numerology of the at least two reference numerologies for synchronization signal numerologies. Positions of the synchronization signals within the determined time occasions are determined on the basis of a second reference numerology of the at least two reference numerologies. Positions of the synchronization signals according to the synchronization signal numerology are determined at least on the basis of the determined time occasions and the positions within the time occasions. The synchronization signals are received at the determined positions. In this way, the synchronization signal block duration may be extended in time and/or the number of synchronization signal blocks may be increased without introducing a need for a new numerology for synchronization signal numerologies.

A mobile station device that receives control information having a downlink control information format and addressed by a Cell-Radio Network Temporary Identifier on a physical downlink control channel from a base station device. The mobile station device also transmits a random access preamble using a random access channel to the base station device based on receiving the control information which provides a random access order. The downlink control information format includes a first field for downlink resource assignment. In a first case that the downlink control information form at is used for the random access order, a fixed value is set to the first field, while in a second case in which the downlink control information format is used for downlink scheduling, a first value different from the fixed value is set to the first field.

A system and method are disclosed for providing uplink timing synchronization during DRX operation in a wireless communication system.

A method of wireless communication includes receiving a first configuration for a first uplink (UL) transmission at a first time. The first configuration indicates a first transmission configuration indication (TCI) state and a first identifier (ID). A second configuration for a second UL transmission is received at a second time. The second configuration indicates a second TCI state and a second ID. The second UL transmission has a same priority or a same type as the first UL transmission. The first UL transmission is determined to be higher in a hierarchy than the second UL transmission based on a relationship between the first ID and the second ID. The first UL transmission is transmitted with the first TCI state based on the determined hierarchy. The second UL transmission is transmitted with the first TCI state or the second UL transmission is dropped based on the hierarchy.