Abstract: A communication method according to a first aspect is a communication method performed by a user equipment in an RRC idle state or an RRC inactive state, the communication method including the steps of determining a cell reselection threshold value according to an intended network slice of the user equipment, measuring radio quality of a radio signal received by the user equipment from a network, and controlling cell reselection or cell selection according to a result of comparison between the measured radio quality and the cell reselection threshold value.

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 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: In an aspect, a communication method is performed in a user equipment in an RRC idle state or an RRC inactive state. The communication method includes: specifying, as a candidate cell for cell reselection, a cell belonging to a frequency supporting a selected network slice group selected in accordance with a priority provided by a NAS layer; and determining whether the candidate cell supports the selected network slice group. The determining includes: receiving a system information block from a serving cell of a user equipment for each of a plurality of network slice groups, the system information block including information indicating an identifier of the network slice group and a cell identifier of a cell that does not support the network slice group; and determining whether the candidate cell supports the selected network slice group, based on the information.

Abstract: In a first aspect, a communication control method is a communication control method in a user equipment. The communication control method includes: transmitting, to a core network apparatus, information indicating a plurality of network slices desired by a user equipment; and receiving, from the core network apparatus, information indicating a priority of each of the plurality of network slices.

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 receiving, by a first layer of a user equipment in a Radio Resource Control (RRC) idle state or an RRC inactive state, system information from the base station. The communication control method includes notifying, by the first layer of the user equipment, a second layer higher than the first layer of at least one of first information indicating whether slice-specific cell reselection is available and second information indicating whether a slice-specific random access channel is available, based on the system information.

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 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 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: 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: 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: A transmission-side PDCP entity performs PDCP concatenation processing of concatenating a plurality of PDCP Service Data Units (SDUs) and thereby generates a PDCP PDU including a concatenated SDU. A reception-side PDCP entity performs PDCP segmentation processing of segmenting the concatenated SDU included in the PDCP PDU into the plurality of PDCP SDUs. A first communication apparatus including one PDCP entity transmits control information used for control of the PDCP concatenation processing and/or the PDCP segmentation processing to a second communication apparatus including the other PDCP entity.

Abstract: In a first aspect, a communication control method is a communication control method used in a mobile communication system for providing a multicast broadcast service (MBS). The communication control method includes: transmitting, by a base station to a group including a plurality of user equipments, a group notification indicating activation of a multicast session corresponding to the group; and receiving, by the base station, a random access preamble transmitted from the user equipment in response to reception of the group notification. The transmitting of the group notification includes transmitting, by the base station, the group notification to each of a plurality of subgroups at different timings, the plurality of subgroups being obtained by dividing the group.

Abstract: A radio communication module 10 includes: a radio communicator 12 configured to perform radio communication; a storage 14 configured to store set information that sets operation relating to radio communication; and a controller 13 configured to stop at least transmission operation of the radio communicator 12 or change at least a part of set information accorded to a specification of a communication carrier of a first country, when it is set so as to operate by using the set information accorded to the specification of the communication carrier of the first county and the radio communication module 10 locates in a second country different to the first country.

Abstract: A radio communication equipment installed on a vehicle comprises a radio communicator configured to perform radio communication with a network, and a controller configured to perform call origination to a public safety answering point (PSAP) via the network, wherein the controller is configured to perform first call origination to the PSAP upon occurrence of an emergency, determine whether there is an abnormality in call upon the first call origination, and perform second call origination to the PSAP by a scheme different from a scheme used for the first call origination when there is an abnormality in call upon the first call origination.

Abstract: A radio communication module 10 includes: a radio communicator 12 configured to perform radio communication; a storage 14 configured to store set information that sets operation relating to radio communication; and a controller 13 configured to stop at least transmission operation of the radio communicator 12 or change at least a part of set information accorded to a specification of a communication carrier of a first country, when it is set so as to operate by using the set information accorded to the specification of the communication carrier of the first county and the radio communication module 10 locates in a second country different to the first country.

Abstract: A radio communication equipment installed on a vehicle comprises a radio communicator configured to perform radio communication with a network, and a controller configured to perform call origination to a public safety answering point (PSAP) via the network, wherein the controller is configured to perform first call origination to the PSAP upon occurrence of an emergency, determine whether there is an abnormality in call upon the first call origination, and perform second call origination to the PSAP by a scheme different from a scheme used for the first call origination when there is an abnormality in call upon the first call origination.

Abstract: According to an aspect, a communication device includes: a first communication unit for performing communication using a first communication scheme; a second communication unit for performing communication using a second communication scheme; and a control unit for processing the incoming call based on a status of the second communication unit.