Abstract: A relay (UE) receives, from a source UE device, a source transmission comprising destination device data and a relay indicator indicating that the destination device data is to be transmitted to a destination UE device. The relay UE device determines whether other communication data is pending transmission to another UE device over a device-to-device communication link. If other communication data is pending transmission, the relay UE device determines whether a destination data priority level of the destination device data is greater than another data priority level of the other communication data. The destination device data is transmitted to the destination UE device in accordance with the priority levels.

Abstract: A source user equipment (UE) device receives a neighbor list from each of a plurality of neighbor UE devices where each neighbor list identifies proximate UE devices that are within communication range of the neighbor UE device transmitting the neighbor list. The source UE device selects, from the plurality of neighbor UE devices, at least one candidate relay device for relaying destination device data to a destination UE device. The selection is at least partially based on the received neighbor lists. The destination device data and a relay indicator are transmitted to the at least one candidate relay device where the indicator indicates that the at least one candidate device is to transmit the destination device data to the destination UE device.

Abstract: A source user equipment (UE) device receives a neighbor list from each of a plurality of neighbor UE devices where each neighbor list identifies proximate UE devices that are within communication range of the neighbor UE device transmitting the neighbor list and including link information indicating a link quality of a communication link between the neighbor UE device and each proximate UE device in the neighbor list. The source UE device selects, from the plurality of neighbor UE devices, at least one candidate relay device for relaying destination device data to a destination UE device where the selection is at least partially based on the link quality information in the neighbor lists. The destination device data and a relay indicator are transmitted to the at least one candidate relay device. The indicator indicates that the at least one candidate device is to transmit the destination device data to the destination UE device.

Abstract: A relay user equipment (UE) device transmits selected system information in a sidelink discovery message where the selected system information is a subset of system information received from a cell at the relay UE device. A remote UE device receiving the sidelink discovery message with the selected system information obtains at least system information for accessing the cell where such system information may not be available directly from the cell. The remote UE receiving select system information from each of a plurality of candidate relay UE devices manages relay selection/reselection at least partially based on the selected system information.

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: Provided is a communication control method used in a mobile communication system providing a multicast and broadcast service (MBS) from a base station to a user equipment and includes receiving, by the user equipment in an RRC connected state and from the base station, unicast signalling including an MBS configuration used for MBS reception, and performing, by the user equipment having transitioned from the RRC connected state to an RRC idle state or an RRC inactive state, the MBS reception by using the MBS configuration received in the RRC connected state.

Abstract: A communication control method used in a mobile communication system for providing an MBS includes configuring, by abase station, for a user equipment, a multicast broadcast service (MBS) bearer split into a point-to-point (PTP) communication path and a point-to-multipoint (PTM) communication path, and transmitting, by the base station, to the user equipment, an indication of individually activating or deactivating the PTP communication path and the PTM communication path.

Abstract: A communication control method used in a mobile communication system for providing a multicast and broadcast service (MBS) from a first base station to a first user equipment includes collecting, by the first base station and from at least one second base station within a predetermined range from the first base station, MBS interest information received by the at least one second base station from a second user equipment, and controlling, by the first base station, MBS transmission of the first base station, based on the MBS interest information collected.

Abstract: An embodiment provides a communication control method in a mobile communication system including a first user equipment and a second user equipment. The first user equipment and the second user equipment communicate wirelessly with each other by sidelink communication. The communication control method includes, by the first user equipment in a PC5-Radio Resource Control (RRC) connected state with the second user equipment, measuring a channel utilization of a radio resource used for the sidelink communication and transmitting the measured channel utilization to the second user equipment. Furthermore, the communication control method includes receiving, by the second user equipment, the channel utilization.

Abstract: A communication control method used in a mobile communication system, the mobile communication system providing a multicast broadcast service (MBS) from a base station to a user equipment, the communication control method including, by the base station, performing header compression processing in which transmission of header information is omitted, the header information being static information included in a header of an MBS packet, and transmitting a compressed MBS packet subjected to the header compression processing, and transmitting, by the base station, after starting transmitting of the compressed MBS packet, the header information separately from the compressed MBS packet.

Abstract: A communication control method is used in a mobile communication system for providing a multicast broadcast service (MBS) from a base station to user equipment, and includes receiving, by the base station from a core network or another base station, a specific Packet Data Convergence Protocol (PDCP) sequence number specified to be applied to an MBS packet; associating, by the base station, the MBS packet with the specific PDCP sequence number; and transmitting, by the base station to the user equipment, the MBS packet associated with the specific PDCP sequence number.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by a first relay node subordinate to a first donor base station, a first packet to a second donor base station different from the first donor base station. The communication control method includes forwarding, by the second donor base station, the first packet to the first donor base station by using a path for data forwarding, and transmitting, by the first donor base station, the first packet to a network.

Abstract: In an embodiment, a communication control method is a communication control method used in a mobile communication system, the mobile communication system including a user equipment and a base station apparatus and being configured to perform wireless communication between the user equipment and the base station apparatus. The communication control method includes acquiring, by a first layer of the user equipment, slice information of a cell in which the user equipment exists, the slice information being transmitted from the base station apparatus, and notifying, by the first layer of the user equipment, a second layer of the user equipment of the slice information, the second layer being positioned higher than the first layer.

Abstract: A communication control method used in a mobile communication system that provides a multicast broadcast service (MBS) from a base station to a user equipment includes receiving, at a first base station establishing an MBS connection with a core network apparatus, MBS data from the core network apparatus through the MBS connection, transmitting, from the first base station to a first user equipment in multicast or broadcast, the MBS data received from the core network apparatus, and transmitting, from the first base station to a second base station, at least one of a first identifier or a second identifier, the first identifier identifying the core network apparatus, the second identifier identifying an MBS session provided by the first base station in multicast or broadcast.

Abstract: A communication control method used in a cellular communication system includes transmitting, by a relay user equipment having a capability of relaying data of a remote user equipment, a message including information related to the relay user equipment, receiving, by the remote user equipment, the message, and performing, by the remote user equipment, processing that establishes sidelink connection between the remote user equipment and the relay user equipment, based on the message.

Abstract: A communication control method used in a cellular communication system includes determining, by a remote user equipment having sidelink connection with a relay user equipment, a network communication state between the remote user equipment and a cellular communication network, and performing, by the remote user equipment, control related to sidelink communication between the remote user equipment and the relay user equipment, based on the network communication state.

Abstract: In an embodiment, a communication control method is a communication control method in a mobile communication system that includes a first user equipment and a second user equipment and can perform sidelink communication between the first user equipment and the second user equipment. The communication control method includes, when the first user equipment transmits a Radio Resource Control (RRC) message including configuration information related to the sidelink communication, and discontinuous reception is configured between the first user equipment and the second user equipment, performing, by the first user equipment, waiting processing for reception of an RRC response message responding to the RRC message regardless of a configuration of the discontinuous reception. The communication control method includes transmitting, by the second user equipment, the RRC response message responding to the RRC message when receiving the RRC message, and receiving, by the first user equipment, the RRC response message.

Abstract: A receiving user equipment (UE) device transmits a distance-based hybrid automatic repeat request (HARQ) feedback message to a transmitting UE device based on sidelink signal quality when location information is unavailable. The receiving UE device is one of a group of UE devices receiving a groupcast data transmission from the transmitting UE device where the groupcast data transmission comprises a distance-based hybrid automatic repeat request (HARQ) feedback configuration. When location information is unavailable to the receiving UE device, the receiving UE device transmits the distance-based HARQ feedback if the signal strength of a signal received from the transmitting UE device is above a threshold and does not send the HARQ feedback if the signal quality is below the threshold. The threshold may be received from the transmitting UE device.

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 control method according to an aspect is a communication control method using a user equipment, the user equipment including a first SIM corresponding to a first mobile network and a second SIM corresponding to a second mobile network. The communication control method includes transmitting, by the user equipment, timing information to the first mobile network in response to occurrence of a predetermined event, and the timing information indicates an execution timing that is a timing at which communication is executed in the second mobile network.