Abstract: A method, performed by a DU of a distributed base station that includes the DU and a CU, of managing time alignment includes transmitting a timing advance command to a UE, starting or restarting a first time alignment timer that indicates validity of a configured grant configuration when the UE is in an RRC connected state with a RAN, and, after starting or restarting the first time alignment timer, determining to transition the UE from the RRC connected state to an RRC inactive state. The method also includes, in response to the determining, (i) transitioning the UE from the RRC connected state to the RRC inactive state by transmitting a first message to the UE, (ii) stopping the first time alignment timer, and (iii) starting or restarting a second time alignment timer that indicates validity of a CG-SDT configuration when the UE is in the RRC inactive state.

Abstract: A method of managing configuration information for SDT operation is performed by a RAN node. The method includes transmitting to a UE, while the UE is in an RRC connected state, a first message, the first message including an SDT configuration for use by the UE when the UE operates in an RRC inactive state. The method also includes, after transmitting the first message, determining to release the SDT configuration. The method also includes, in response to the determining and while the UE is in the RRC inactive state, transmitting to the UE an RRC release message including a release indication for indicating that the UE is to release the SDT configuration.

Abstract: A method of managing configuration information for SDT operation is performed by a DU of a distributed base station. The method includes receiving, from a CU of the distributed base station, a CU-to-DU message including a full SDT configuration for a UE, generating a delta SDT configuration to update the full SDT configuration, and transmitting to the CU a DU-to-CU message that includes the delta SDT configuration.

Abstract: In a method of managing a configured grant small data transmission (CG-SDT) time alignment timer that indicates validity of a CG-SDT configuration, a user equipment (UE) receives a radio resource control (RRC) release message from a radio access network (RAN). In response to the RRC release message, the UE resets a medium access control (MAC) entity of the UE and, after resetting the MAC entity, starts the CG-SDT time alignment timer.

Abstract: A method, performed by a UE, of managing time alignment includes receiving a timing advance command from a RAN, starting or restarting a first time alignment timer that indicates validity of a CG configuration when the UE is in an RRC connected state with the RAN, and then receiving a first message from the RAN. The method also includes, in response to the first message, transitioning from the RRC connected state to an RRC inactive state, stopping the first time alignment timer, and starting or restarting a second time alignment timer that indicates validity of a CG-SDT configuration when the UE is in the RRC inactive state, and then receiving a second message from the RAN. The method also includes, in response transitioning to the RRC connected state, again starting the first time alignment timer, and communicating data with the RAN.

Abstract: Granting access to a communication channel for several user devices by a base station includes receiving, from at least a first and second user device, at least a first request to access the communication channel and a second request to access the communication channel (1202), the first request including a first random access preamble and a first payload, and the second request including a second random access preamble and a second payload, and transmitting, to at least the first and second user devices, a response message including at least a first control channel resource assignment configuring at least a first control channel resource for the at least the first user device to transmit an acknowledgement of the response message (1208).

Abstract: To manage configuration, a UE receives, by processing hardware and from a radio access network (RAN), conditional configuration information including (i) a conditional configuration related to a base station operating in the RAN, and (ii) a condition to be satisfied before the UE applies the configuration (702). The UE receives, by the processing hardware and from the RAN, a message including an indication that the UE is to add, modify, or release a radio bearer (RB) (704), and determines, by the processing hardware, to ignore the conditional configuration in response to receiving the message (706).

Abstract: Allocating resources to user devices in a base station includes transmitting, to a user device, indications of a first time-frequency resource including a first frequency sub-band within a bandwidth part allocated in an unlicensed spectrum and a second time-frequency resource including a second frequency sub-band within the bandwidth part, performing a channel access procedure on the first channel corresponding to the first frequency sub-band, and a second channel corresponding to the second frequency sub-band, to obtain channel occupancy time on at least one of the first channel or the second channel; and transmitting, within the obtained channel occupancy time on at least one of the first channel or the second channel, downlink control information to a user device over a first time-frequency resource that includes the first frequency sub-band or a second time-frequency resource that includes the second frequency sub-band.

Abstract: To activate reception of multicast and/or broadcast services (MBS), a UE operating in an inactive state of a protocol for controlling radio resources receives, in the inactive state from a radio access network (RAN), a message including an MBS session identifier (ID). The UE initiates reception of MBS data corresponding to the MBS session ID in response to the message.

Abstract: Base stations perform methods for supporting a conditional procedure for a user equipment (UE). A method performed by a first base station may include receiving (1202), by the first base station from a second base station, an indication of one or more candidate secondary cells to which the UE can connect, subject to a condition, to communicate in dual connectivity (DC); receiving (1204), by the first base station, subsequently to the UE connecting to a secondary cell among the one or more candidate secondary cells for which the condition is satisfied, coordination information for the secondary cell, the coordinating information being usable for coordinating usage of radio resources with the second base station while the UE communicates in DC; and applying (1206), by the first base station, the coordination information to coordinate the usage of radio resources with the second base station.

Abstract: A method for paging a UE is implemented in a distributed unit (DU) of a distributed base station. The method includes receiving, by processing hardware from a central unit (CU) of the distributed base station and when the UE is not operating in a connected state of a protocol associated with controlling radio resources, a CU-to-DU message related to the UE and indicating a voice call; and transmitting, by the processing hardware to the UE via a radio interface, a paging message including an indication of the voice call.

Abstract: To manage reception of Multicast and Broadcast Services (MBS) data, a user equipment (UE) receives, from a radio access network (RAN), a paging message including an MBS session identifier (ID), the MBS session ID including a Temporary Mobile Group Identity (TMGI); and initiates reception of MBS in response to the paging message.

Abstract: A master node (MN) can implement a method for managing a conditional procedure that involves a user equipment (UE), a candidate secondary node (C-SN), and the MN. The method may include transmitting, to the C-SN, a request to perform the conditional procedure related to the C-SN and the UE, the conditional procedure associated with a condition and a conditional configuration according to which the UE connects to the C-SN when the condition is satisfied; receiving, from the C-SN, a response to the request, the response including an SN-to-MN container; and retrieving the conditional configuration from the SN-to-MN container.

Abstract: A UE communicating in DC with an MN and an SN receives a configuration related to a C-SN and at least one condition for connecting to the C-SN, determines that a radio connection between the UE and the MN has failed, and transmits a first indication of the failed radio connection to the SN to initiate a recovery procedure. The UE also releases the configuration and/or the at least one condition, or suspending a procedure, for connecting to the C-SN\.

Abstract: A central unit (CU) of a distributed base station, the distributed base station including the CU and a distributed unit (DU), can implement a method for managing a radio function for communicating with a UE. The method may include determining (1202) to transmit a CU-to-DU message, related to control of data communication with the UE, to the DU, and determining (1204) whether the data communication requires the DU to perform the radio function. The method further includes, based on whether the data communication requires the DU to perform the radio function, determining (1206) whether to include an indication in the CU-to-DU message to enable the radio function at the DU. The method also includes transmitting (1208) the CU-to-DU message to the DU.

Abstract: A base station can implement a method for configuring a multicast radio bearer (MRB) for a multicast and/or broadcast services (MBS) session. The method may include determining (1502) that the MBS session or the MRB requires uplink resources. The method may also include, based on the determining, selecting (1504) a configuration for the MRB, the configuration including configuration parameters for a user equipment (UE) to receive the MBS session. The method may further include transmitting (1506) the selected configuration to the UE.

Abstract: A user device operating in dual-mode connectivity with a master node and a secondary node detects a failure of a secondary cell group associated with the secondary node (1104). In response, the user device suspends an secondary cell group transmission (1106). The user device generates a message related to a status of the SCG for transmission to the MN (1108) and transmitting the message to the MN when the SCG transmission is suspended (1110).

Abstract: A UE receives, from a non-terrestrial network (NTN), a measurement configuration that indicates (i) a timing pattern according to which a signal source associated with the NTN transmits a synchronization signal and (ii) a timing parameter related to a change in timing alignment between the UE and the signal source. The UE receives, from the signal source, the synchronization signal in accordance with the timing pattern and the timing parameter.

Abstract: A UE activates a timer for applying access control to transmissions associated with a certain access category during an access control period, in response to a first system information message received via a radio interface and a mobile-originated access request (1702). While the timer is running, the UE receives a second message that indicates a potential transition of the UE (i) from a current state associated with a protocol for controlling radio resources to another state associated with the protocol, or (ii) from a current cell to a new cell (1704). In response to the second message, the UE continues to apply the access control to the transmissions for the access category, for a remainder of the access control period (1706).

Abstract: A distributed unit (DU) of a distributed base station including a central unit (CU) and the DU can implement a method for configuring a user equipment (UE) to receive multicast and/or broadcast services (MBS). The method may include: receiving (1002), from the CU, a CU-to-DU message identifying an MBS session and requesting that the DU configure resources for the MBS session; and transmitting (1004), to the UE in response to receiving the CU-to-DU message, configuration parameters for receiving the MBS session.