Abstract: A communication method according to a first aspect is a communication method used in a mobile communication system supporting a multicast broadcast service (MBS) and includes transmitting, at a user equipment performing MBS reception or being interested in the MBS reception in a radio resource control (RRC) connected state, an RRC message to a base station. The transmitting includes transmitting the RRC message including an information element indicating a mode desired by the user equipment as an MBS delivery mode or an MBS reception mode from the base station.

Abstract: In a first aspect, a communication method is a communication method used in a mobile communication system for supporting a multicast and broadcast service (MBS). The communication method includes: managing, by a user equipment having started reception of an MBS session from a base station, a first Packet Data Convergence Protocol (PDCP) variable updated in response to reception of a PDCP packet in the MBS session, the first PDCP variable being managed in a PDCP layer; and performing, by the user equipment, control of synchronizing the first PDCP variable with a second PDCP variable managed by the base station, in response to determining that the reception of the MBS session has been interrupted for a predetermined time.

Abstract: A communication control method includes: receiving, by a relay apparatus, a first scheduling request of requesting allocation of an uplink radio resource to a lower apparatus from the lower apparatus; and after the relay apparatus receives the first scheduling request from the lower apparatus, transmitting, by the relay apparatus, a second scheduling request of requesting allocation of uplink radio resource to the relay apparatus to an upper apparatus before receiving the uplink data from the lower apparatus.

Abstract: A user equipment includes a step of receiving network slice restriction information related to a network slice to be provided with a restrictive condition from a base station or a core network apparatus. The restrictive condition is a condition for restricting use of the network slice. The network slice restriction information includes an identifier for identifying the network slice and information indicating the restrictive condition.

Abstract: A communication control method includes determining, at a base station, a restrictive condition that is a condition for restricting use of a network slice, and transmitting, at the base station, restriction information related to the network slice to a core network apparatus, a certain base station other than the base station, or a user equipment.

Abstract: According to an aspect, a communication control method includes deciding, at a user equipment, a communication condition to be satisfied by a network slice desired by the user equipment, and transmitting, at the user equipment, a creation request to a core network apparatus, the creation request being a message requesting to create the network slice and including information indicating the communication condition.

Abstract: A source user equipment (UE) device is restricted to same-cell relay UE device reselection if the communication link quality to the same-cell relay device is above a threshold and network access is available through a same-cell relay UE device. In some situations, relay selection is based multiple thresholds related to a communication link quality of the link to the serving base station of the source UE device.

Abstract: In a first aspect, a communication control method is used in a mobile communication system including a user equipment and a base station, and being capable of performing wireless communication between the user equipment and the base station. The communication control method includes performing, by the user equipment, a slice-specific random access channel which is a random access procedure using a resource separated per slice or per slice group. The communication control method includes recording, by the user equipment, first log information in a memory, the first log information being acquired when the slice-specific random access channel is performed. The communication control method further includes transmitting, by the user equipment, the first log information to the base station.

Abstract: In a first aspect, a cell reselection method is used in a user equipment in an RRC idle state or an RRC inactive state, the cell reselection method including: specifying a service or a function that the user equipment desires to use; selecting a target in response to an instruction from a network or periodically with, as a candidate, a cell or a frequency having a result of measurement processing, the result satisfying a predetermined condition, the measurement processing being performed on a cell or a frequency different from a current existing cell; and performing cell reselection to the target selected. The selecting of the target includes performing control for selecting, as the target, a cell or a frequency providing the service or the function specified.

Abstract: A communication control method includes determining, at a core network apparatus, a restrictive condition that is a condition for restricting use of a network slice, and transmitting, at the core network apparatus, network slice restriction information related to the network slice to a user equipment or a base station. The network slice restriction information includes a network slice identifier for identifying the network slice and condition information indicating the restrictive condition.

Abstract: A communication control method according to a first aspect includes configuring, by a network apparatus, to a first user equipment a path between the network apparatus and the first user equipment via a second user equipment, the configuring includes transmitting, by the network apparatus, a message to configure the path to the first user equipment, and the message includes information regarding an RLC channel and information regarding a radio bearer.

Abstract: A communication control method according to one embodiment is a method for a first communication apparatus to perform radio communication with a second communication apparatus in a cell operated in an unlicensed band. The communication control method includes configuring a first bandwidth part and a second bandwidth part having a narrower bandwidth than the first bandwidth part within a carrier frequency of the cell, measuring, by the first communication apparatus, disturbing wave power in the first bandwidth part and the second bandwidth part, and transmitting, by the first communication apparatus, a radio signal to the second communication apparatus by using a bandwidth part in which a disturbing wave is evaluated to not be present based on a result of the measurement.

Abstract: A communication control method used in a mobile communication system includes receiving, at a base station shared by a plurality of core networks from each of the plurality of core networks, an MBS service identifier indicating an MBS service provided by the corresponding one of the plurality of core networks; and transmitting, at the base station, MBS data belonging to the MBS service to a plurality of user equipments belonging to a plurality of Public Land Mobile Networks (PLMNs) corresponding to the plurality of core networks through multicast or broadcast. The MBS service identifier is a unique identifier independent of the plurality of PLMNs.

Abstract: According to an embodiment, a communication control method includes: establishing, by a smart repeater (SR) wireless terminal capable of beamforming, a wireless connection to a base station, the SR wireless terminal controlling an SR device relaying wireless communication between the base station and a wireless terminal; and transmitting, by the base station, one or more SR control configurations used to control the SR device to the SR wireless terminal through wireless communication.

Abstract: In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes performing, by a donor node for each of a first user equipment and a second user equipment, configuration to establish a data radio bearer (DRB) between the first user equipment and the second user equipment. The communication control method includes establishing, by the first user equipment and the second user equipment, a first Packet Data Convergence Protocol (PDCP) entity and a second PDCP entity, respectively, in response to receiving the configuration. The communication control method includes transmitting, by the first PDCP entity, data to the second PDCP entity without involving a User Plane Function (UPF).

Abstract: A communication method used in a mobile communication system includes: a step S1 of configuring, by a base station, a user equipment with a first communication path and a second communication path associated with the first communication path as communication paths to be established between the base station and the user equipment; a step S2 of mapping, by an entity in a predetermined layer of the user equipment, first data belonging to a data flow to the first communication path; a step S3 of mapping, by the entity, to the second communication path, second data belonging to the data flow and being assigned a higher priority than the first data; and a step S4 of transmitting, by the user equipment to the base station, the second data mapped to the second communication path with priority over the first data mapped to the first communication path.

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 abase station of a RAT different from the RAT of the MDT log.

Abstract: A handover control method is a method for performing a conditional handover of a user device from a source cell to a target cell, the source cell to which the user device connects. The handover control method comprises: receiving, by the user device from the source cell, a handover command including a list of candidate cells which are candidates for the target cell and a handover condition specified for each of the candidate cells in the list; and when a handover condition corresponding to a specific candidate cell in the list included in the received handover command is satisfied, performing a handover to the specific candidate cell in which the handover condition is satisfied.

Abstract: Handovers in a New Radio-Unlicensed Standalone (NR-U SA) communication system are managed by invoking one of a plurality of handover procedures based on conditions related to the communication device and channel status. One example of one of the plurality of handover procedures includes sending a handover command with an inactivity indicator to the UE device where the UE device transitions to an Inactive State (such as RRC_INACTIVE) in response to a handover failure (HOF) resulting from an occupied unlicensed channel. The UE device provides the I-RNTI allocated by the last serving gNB when resuming from the RRC_INACTIVE to the active state; thereby reducing the latency associated with a new connection from the idle mode. The target gNB uses the I-RNTI to retrieve the UE context from the last serving gNB.

Abstract: According to an embodiment, a communication control method includes: establishing, by a smart repeater (SR) wireless terminal capable of beamforming, a wireless connection to a base station, the SR wireless terminal controlling an SR device relaying wireless communication between the base station and a wireless terminal; and transmitting, by the SR wireless terminal to the base station through wireless communication, SR device information indicating at least one of a capability of the SR device and a control state of the SR device.