Abstract: A communication apparatus, which is capable of performing, in a predetermined frequency band to be used by a first radio communication system configured to periodically transmit a reference signal with a predetermined frequency spacing, communication using a second radio communication system that is different from the first radio communication system, performs communication of the second radio communication system while the base station apparatus of the first radio communication system operates in a mode in which periodic transmission of the reference signal is stopped for a predetermined period, based on information relating to a timing at which a base station apparatus of the first radio communication system is to operate in the mode.

Abstract: A communication device, which is capable of performing communication via a second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, transmits, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period, and performs communication involving a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode.

Abstract: A terminal apparatus that belongs to a first communication system that uses a first frequency band obtains, from a base station apparatus that belongs to the first communication system, setting information indicating setting of measurement in a second frequency band used for a second communication system, performs, based on the setting information, measurement of a predetermined signal transmitted from another base station apparatus that belongs to the second communication system, notifies the base station apparatus of a result of the measurement, and communicates with the base station apparatus in accordance with scheduling performed by the base station apparatus based on the result of the measurement.

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 communication device communicates with the partner device by forming a first beam used when transmitting a signal to the partner device based on a state of the transmission path estimated by the communication device, or by forming a second beam used when transmitting a signal to the partner device based on information pertaining to specification of a beam used when transmitting a signal to the partner device determined by the partner device, and controls, during communication with the partner device using the first beam, to switch a beam to be used from the first beam to the second beam based on a first wireless quality in the partner device for a first wireless signal transmitted using the first beam and a second wireless quality in the partner device for a second wireless signal transmitted using a predetermined beam related to the second 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 communication apparatus, which is capable of performing, in a predetermined frequency band to be used by a first radio communication system configured to periodically transmit a reference signal with a predetermined frequency spacing, communication using a second radio communication system that is different from the first radio communication system, performs communication of the second radio communication system while the base station apparatus of the first radio communication system operates in a mode in which periodic transmission of the reference signal is stopped for a predetermined period, based on information relating to a timing at which a base station apparatus of the first radio communication system is to operate in the mode.

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 communication device, which is capable of performing communication via a second wireless communication system that is different from a first wireless communication system, in a frequency band that is used by the first wireless communication system, the first wireless communication system periodically transmitting a reference signal, transmits, to a base station device of the first wireless communication system, information for operating the base station device in a mode in which the periodical transmission of the reference signal is interrupted for a predetermined period, and performs communication involving a predetermined signal of the second wireless communication system while the base station device of the first wireless communication system is operating in the mode.

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 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: 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.