Abstract: Relay user equipment (UE) devices transmit coverage indicators to notify remote UE devices of coverage status and relay capability. Each coverage indicator may include an indication that the relay UE device is in coverage of cell and identification of the cell. For the examples, the coverage indicator indicates the relay capability of the relay UE device with an indication on whether the relay UE device is capable of providing U2U relay service to a target UE device. U2N relay service to a base station, or both U2U and U2N relay service. A remote UE device searching for a preferred relay UE device evaluates the conditions based on the information provided in the coverage indicators to select a preferred relay path from two or more relay paths through candidate relay UE devices.

Abstract: A user equipment, method used in a user equipment, and apparatus controlling a user equipment receive an RRC (Radio Resource Control) Release message when the user equipment is in an RRC connected state. The RRC Release message includes information indicating an uplink radio resource used for transmitting uplink data from the user equipment in an RRC inactive state. The user equipment, method, and apparatus control, in response to receiving the RRC Release message, the user equipment to transition from the RRC connected state to the RRC inactive state. The user equipment, method, and apparatus transmit the uplink data by using the uplink radio resource indicated by the information included in the RRC Release message when the user equipment is in the RRC inactive state.

Abstract: A communication method performed by a UE in a mobile communication system for providing a multicast and broadcast service (MBS) includes: receiving an MBS signal transmitted from a plurality of cells included in a single frequency network (SFN) by using an identical identifier; measuring reception quality of the MBS signal using the identical identifier as a measurement target; and reporting, to a network, a measurement result obtained by the measurement.

Abstract: A cell reselection method performed by a user equipment in a mobile communication system includes: receiving, from a network, slice frequency information indicating a correspondence relationship between network slice groups, frequencies, and frequency priorities; determining, for a selected network slice group selected by a user equipment in accordance with a slice group priority, priority orders of corresponding frequencies based on the frequency priorities indicated by the slice frequency information; and reselecting a candidate cell satisfying a predetermined quality standard within a selected frequency selected by the user equipment in accordance with the determined priority orders. The determining of the priority orders includes determining, for each of the frequencies, the priority orders of the corresponding frequencies, based on a maximum value of the frequency priorities for each of a plurality of network slice groups when the plurality of network slice groups have a same slice group priority.

Abstract: In a first aspect, a communication method is a method executed by a user equipment (UE 100) communicating with a first cell (cell #1) in a mobile communication system providing a multicast and broadcast service (MBS). The communication method includes transmitting, to the first cell, a message related to an MBS reception timing for the user equipment to perform MBS reception from a second cell (cell #2) belonging to a frequency different from a frequency to which the first cell belongs (S106).

Abstract: A communication method performed by a UE in a mobile communication system for providing a multicast broadcast service (MBS) includes: a step S6 of receiving, from a source cell C1, a radio resource control (RRC) reconfiguration message including a conditional handover (CHO) configuration regarding a candidate cell C2 for CHO; and a step S9 of starting MBS reception from the candidate cell C2 using an MBS reception configuration before performing the CHO in response to the CHO configuration including the MBS reception configuration, the MBS reception configuration allowing an MBS session provided by the candidate cell through Point-To-Multipoint (PTM) to be received.

Abstract: User equipment, and an apparatus and method used in user equipment are perform a predetermined data transmission in which the user equipment transmits uplink user data when the user equipment is in an RRC inactive state. The user equipment, apparatus and method transmit a random access preamble for the predetermined data transmission to a base station during a random access procedure, and transmit an MSG 3 message together with uplink user data to the base station during the random access procedure. A base station performs a predetermined data transmission in which a user equipment transmits uplink user data when the user equipment is in an RRC inactive state, includes a receiver receiving a random access preamble for the predetermined data transmission during a random access procedure from the user equipment, and receives an MSG 3 message together with uplink user data from the user equipment during the random access procedure.

Abstract: A serving base station connected to a remote user equipment (UE) device over a current indirect communication path sends a conditional path switch reconfiguration message to the remote UE device. The current indirect communication path is through at least one relay UE device. The conditional path switch reconfiguration message instructs the remote UE device to switch from the current indirect communication path to an alternate indirect communication path when a condition is met. The alternate indirect communication path may be to the serving base station or to an alternate base station.

Abstract: A serving base station connected to a remote user equipment (UE) device over a current communication path sends a conditional path switch reconfiguration message to the remote UE device. The current communication path is either an indirect communication type through at least one relay UE device or a direct communication type without relay UE devices. The conditional path switch reconfiguration message instructs the remote UE device to switch from the current communication path to an alternate communication path when a condition is met. The alternate communication path is a different communication type from the current communication type of the current communication path.

Abstract: A base station transmits a Radio Resource Control (RRC) Reconfiguration message to a remote user equipment (UE) device to initiate a path switch from direct communication with the remote UE device to indirect communication through a relay UE device. The relay UE device is an RRC connection state other than RRC Connected (RRC CONN) when the path switch is initiated. The remote UE device transmits an RRC Reconfiguration Complete message to the base station through the relay UE device. In response to receiving the RRC Reconfiguration Complete message, the relay UE performs RRC Connection Establishment with the base station when the relay UE device is in an RRC IDLE state and performs RRC Resume with the base station when the relay UE device is in an RRC INACTIVE state. The relay UE device transmits the RRC Reconfiguration Complete message to the base station.

Abstract: A communication method is a method performed by a user equipment in a mobile communication system for providing a multicast broadcast service (MBS). The communication method includes receiving, from a base station, configuration information by which a multicast traffic channel (MTCH) associated with an MBS radio bearer (MRB) is configured, and determining, based on the configuration information, whether a type of a session transmitted on the MTCH is a multicast session or a broadcast session.

Abstract: A communication control method used in a user equipment and user equipment that performs a predetermined data transmission in which uplink user data is transmitted during a random access procedure include transmission of a first message for the predetermined data transmission while in a predetermined RRC state in which an RRC connection is suspended to a base station. After transmitting the first message, a second message is received from the base station for maintaining the user equipment in the predetermined RRC state. A communication control method and base station include reception of a first message for the predetermined data transmission at the base station from a user equipment that is in a predetermined RRC state in which an RRC connection is suspended during a random access procedure. After receiving the first message, a second message is received for maintaining the user equipment in the predetermined RRC state.

Abstract: A communication control method according to a first aspect is a method for controlling sidelink communication in a mobile communication system. The communication control method includes the steps of: broadcasting, by a base station of the mobile communication system, first resource information for indicating a carrier frequency or a radio resource pool utilizable in the sidelink communication; and transmitting, by the base station, first transmission type information associated with the first resource information. The first transmission type information is information for designating at least one of unicast, multicast, and broadcast as a transmission type in the sidelink communication using the carrier frequency or the radio resource pool.

Abstract: A communication control method for controlling a two-step random access procedure for completing a contention based random access procedure by performing transmission from user equipment to a base station and performing transmission from the base station to the user equipment after the transmission from the user equipment to the base station includes broadcasting, by the base station, system information indicating a PUSCH resource associated with a preamble resource, and receiving, by the user equipment, the system information. Performing the transmission from the user equipment to the base station includes transmitting, by the user equipment, a random access preamble to the base station, and using, by the user equipment, the PUSCH resource associated with the preamble resource used to transmit the random access preamble, based on the system information, to transmit a control message to the base station.

Abstract: The devices, systems, and methods discussed herein facilitate the transition of a remote user equipment (UE) device from an indirect path of communication with a base station to a direct path of communication with the base station. More specifically, a relay UE device transmits, to a remote UE device that is indirectly communicating with a base station via the relay UE device, a message indicating that the quality of a communication link between the relay UE device and the base station is below a threshold. In response to receiving the message, the remote UE device transmits a measurement report to the base station. In some examples, the remote UE device starts a timer upon transmission of the measurement report to the base station. In these examples, the timer is used to control the frequency with which the remote UE device transmits additional measurement reports to the base station.

Abstract: In a first aspect, a cell reselection method is performed by a user equipment in a mobile communication system. The cell reselection method includes: receiving, from a network, slice frequency information indicating a plurality of frequencies and a network slice group supported by each of the plurality of frequencies; and when a predetermined frequency not supporting a predetermined network slice group, of which an AS layer is notified by a NAS layer of a user equipment, is present in the slice frequency information, performing control in which a cell belonging to the predetermined frequency is less likely to be selected as a serving cell than a cell belonging to a frequency supporting the predetermined network slice group.

Abstract: A communication control method according to one embodiment is a method in a mobile communication system. The communication control method includes receiving, by a user equipment in an RRC connected mode, an RRC release message from a base station with a condition for releasing or suspending an RRC connection, performing, by the user equipment, data communication with the base station until the condition is met even in a case of receiving the RRC release message, and transitioning, by the user equipment, to an RRC idle mode or an RRC inactive mode when the condition is met.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes causing a relay node to be configured with a BAP address of the relay node in a respective one of topologies from a donor node, receiving, by a BAP layer of the relay node, a packet, and when the BAP address of the relay node in the respective topology associated with an ingress backhaul RLC channel of the packet matches a destination BAP address included in a header of the packet, outputting, by the BAP layer, the packet to an upper layer.

Abstract: A mobile wireless communication user equipment device (mobile device) simultaneously stores logs for two minimization drive tests (MDTs) where a first MDT is associated with a first radio access technology (RAT) and a second MDT is associated with a second RAT. The mobile device logs MDT data for both MDTs to generate two MDT logs. In response to a request, the mobile device transmits a requested MDT log where the MDT log may be transmitted to a base station of a RAT different from the RAT of the MDT log.

Abstract: In a first aspect, a communication control method includes receiving, by a relay node, a packet in an upstream direction, and performing, by the relay node, routing processing for the packet, based on routing configuration information including a plurality of routing IDs. The performing of the routing processing includes, when an egress backhaul link corresponding to a routing ID matching destination information included in a BAP header of the packet is unavailable, performing inter-donor-DU re-routing for the packet.