Abstract: A terminal device that can be connected to one or more base station devices that each form one or more beams is described. The terminal device monitors, when the terminal device is not connected to any of the one or more base station devices, a connection target beam to be used when the terminal device establishes a connection with any of the one or more base station devices; and reports, at least based on a fact that the connection target beam has transitioned, information regarding the connection target beam to a base station device that forms the connection target beam. A base station device among the one or more base station devices to execute paging of the terminal device and a beam to be used in the paging are controlled based on the information regarding the connection target beam.

Abstract: A terminal apparatus that performs communication using a communication path set between the terminal apparatus and a core network via a base station apparatus connected to the core network or via the base station apparatus and a relay apparatus that relays communication with the base station apparatus acquires information regarding candidates of a communication path to which switching should be performed from a first communication used, from the base station apparatus that functions as a serving base station in the first communication path, determines whether or not to perform switching of the communication path from the first communication path, and performs switching from the first communication path to a second communication path included in the candidates without being instructed by the serving base station, in response to the determination to perform the switching after receiving the information regarding the candidates.

Abstract: A terminal apparatus that performs communication using a communication path set between the terminal apparatus and a core network via a base station apparatus connected to the core network or via the base station apparatus and a relay apparatus that relays communication with the base station apparatus acquires information regarding candidates of a communication path to which switching should be performed from a first communication used, from the base station apparatus that functions as a serving base station in the first communication path, determines whether or not to perform switching of the communication path from the first communication path, and performs switching from the first communication path to a second communication path included in the candidates without being instructed by the serving base station, in response to the determination to perform the switching after receiving the information regarding the candidates.

Abstract: A terminal device that can be connected to one or more base station devices that each form one or more beams is described. The terminal device monitors, when the terminal device is not connected to any of the one or more base station devices, a connection target beam to be used when the terminal device establishes a connection with any of the one or more base station devices; and reports, at least based on a fact that the connection target beam has transitioned, information regarding the connection target beam to a base station device that forms the connection target beam. A base station device among the one or more base station devices to execute paging of the terminal device and a beam to be used in the paging are controlled based on the information regarding the connection target beam.

Abstract: A terminal device that can be connected to one or more base station devices that each form one or more beams is described. The terminal device monitors, when the terminal device is not connected to any of the one or more base station devices, a connection target beam to be used when the terminal device establishes a connection with any of the one or more base station devices; and reports, at least based on a fact that the connection target beam has transitioned, information regarding the connection target beam to a base station device that forms the connection target beam. A base station device among the one or more base station devices to execute paging of the terminal device and a beam to be used in the paging are controlled based on the information regarding the connection target beam.

Abstract: A terminal apparatus that performs communication using a communication path set between the terminal apparatus and a core network via a base station apparatus connected to the core network or via the base station apparatus and a relay apparatus that relays communication with the base station apparatus acquires information regarding candidates of a communication path to which switching should be performed from a first communication used, from the base station apparatus that functions as a serving base station in the first communication path, determines whether or not to perform switching of the communication path from the first communication path, and performs switching from the first communication path to a second communication path included in the candidates without being instructed by the serving base station, in response to the determination to perform the switching after receiving the information regarding the candidates.

Abstract: A base station device, which provides a terminal device with communication via a relay device or direct communication, selects a communication path between the terminal device and a core network when the terminal device executes handover, and provides a notification regarding the handover executed by the terminal device, to each of one or more devices that constitute the selected communication path. A connection between the terminal device and the core network is established based on the notification, using the selected communication path.

Abstract: The present invention provides a terminal apparatus: receiving information of candidate base station apparatuses selected, on the basis of a service requested by the terminal apparatus, from among other base station apparatuses which are candidates for switching connection from a serving base station apparatus; acquiring identification information of surrounding base station apparatuses from wireless signals transmitted by the surrounding base station apparatuses; and executing, independent of instruction from the serving base station apparatus, handover to a candidate base station apparatus corresponding to the identification information, when the identification information corresponds to identification information of one of the candidate base station apparatuses, the handover being executed in response to quality of a wireless signal from the serving base station dropping below a predetermined level after the information of the candidate base station apparatuses has been received.

Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.

Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.

Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.

Abstract: A control device in a base station device that includes one or more first devices and a second device that is connected to the first devices, the first devices controlling lower layers, and the second device controlling higher layers, the control device being any of the first devices, notifies the terminal device of information regarding measurement target beams that are to be measured by the terminal device, while a connection to the terminal device is established, receives a measurement report regarding the measurement target beams from the terminal device, selects a beam with which the terminal device is to connect by switching from the connected beam based on the measurement report, and notifies the terminal device of information regarding the second beam. These processes are performed without involving the second device.

Abstract: The present invention provides a terminal device that can be connected to one or more base station devices that each form one or more beams. The terminal device monitors, when the terminal device is not connected to any of the one or more base station devices, a connection target beam to be used when the terminal device establishes a connection with any of the one or more base station devices; and reports, at least based on a fact that the connection target beam has transitioned, information regarding the connection target beam to a base station device that forms the connection target beam. A base station device among the one or more base station devices to execute paging of the terminal device and a beam to be used in the paging are controlled based on the information regarding the connection target beam.

Abstract: A base station device makes notification of information regarding a period in which a terminal device is to attempt to establish a radio link in a first frequency band in the event of occurrence of a radio link failure (RLF) in a radio link that is established in the first frequency band at the terminal device. Upon occurrence of the RLF in the radio link in the first frequency band, the terminal device attempts to reestablish a radio link in the first frequency band, and when the period has elapsed without succeeding in the reestablishment, the terminal device attempts to establish a radio link in a second frequency band that is lower in frequency than the first frequency band.

Abstract: A communication apparatus capable of performing, under the control of the first partner apparatus belonging to the first wireless communication system, parallel communications including the first communication with the first partner apparatus and the second communication with the second partner apparatus belonging to the second wireless communication system different from the first wireless communication system transmits, to the first partner apparatus, information that allows the first partner apparatus to determine whether the communication apparatus is in a state in which it is capable of performing the parallel communications, the information being used for causing the first partner apparatus to control a search for a partner apparatus in the second wireless communication system by the communication apparatus.

Abstract: In a wireless communication system that includes a base station apparatus and one or more terminals capable of connecting to the base station apparatus in a first system and connecting to another apparatus in a second system, the base station apparatus: transmits, to the one or more terminals, a notification related to a permitted period for connecting to the another apparatus in the second system; when a terminal included among the one or more terminals has not been capable of communicating with the another apparatus in the second system over a term related to the permitted period, receives information indicating that the terminal has not been capable of performing communication in the second system from the terminal; and controls connection of the terminal in the second system in response to reception of the information from the terminal.

Abstract: In a wireless communication system that includes a base station apparatus and a terminal capable of connecting to the base station apparatus in a first system and connecting to another apparatus in a second system, the base station apparatus obtains, when a failure has occurred in connection in the second system between the terminal and the another apparatus, information indicating whether the failure is attributed to suspension of communication functions of the terminal in the second system, and controls connection of the terminal in the second system based on the information.

Abstract: In a wireless communication system in which when connecting one terminal apparatus to a base station apparatus and another base station apparatus, the other base station apparatus selects a frequency band to be used for control channels transmitted from the terminal apparatus to the other base station apparatus from a plurality of frequency bands usable by the other base station apparatus, and notifies the terminal apparatus of the selected frequency band, the base station apparatus acquires from the terminal apparatus information about radio quality of a signal received from the other base station apparatus for at least one frequency band out of the plurality of frequency bands, extracts a portion of frequency bands out of the plurality of frequency bands based on the acquired information about radio quality, and notifies the other base station apparatus of information representing the portion of frequency bands.