Abstract:
A wireless communication device for performing communication with a controlled wireless communication device that is controlled by the wireless communication device includes a controller configured to estimate channel quality of a channel that is used in feedback of a signal from the controlled wireless communication device, dynamically adjust, on the basis of the estimated channel quality, the number of quantized bits to be used when the controlled wireless communication device quantizes channel state information, and notify the controlled wireless communication device of the dynamically adjusted number of quantized bits. The controller is also configured to adjust the number of quantized bits such that the number of quantized bits increases as the estimated channel quality improves.
Abstract:
A first base station is configured to be connected with a second base station via an X2 interface. The first base station includes: a controller containing at least one processor and at least one memory, and configured to execute processes of transmitting a message, which includes a first identifier, a change notification, coverage state information, and a second identifier, to the second base station before modifying a coverage of the first cell, the first identifier identifying the first cell, the change notification indicating that the first base station is planned to modify the coverage of the first cell, the coverage state information indicating that a state of the coverage after modification of the coverage, the second identifier identifying a second cell for compensating at least part of the coverage of the first cell; and modifying the coverage of the first cell after transmitting the message.
Abstract:
A communication control method according to a first aspect is a method in a mobile communication system for supporting dual connectivity communication using a master base station for establishing RRC connection with a user terminal and a secondary base station for providing additional radio resources to the user terminal. The communication control method comprises: an inter-master base station handover procedure for performing handover of the user terminal from a source master base station to a target master base station without changing the secondary base station.
Abstract:
An electronic apparatus includes a measurement unit configured to measure a blood flow volume of a subject and a controller configured to estimate a sleep state of the subject based on the blood flow volume of the subject.
Abstract:
A user equipment, method used in user equipment, and apparatus for controlling a user equipment operate to receiving a connected mode DRX parameter configured by a base station, and transmit to the base station a message including information indicating a connected mode DRX parameter preferred by the user equipment. The connected mode DRX parameter preferred by the user equipment includes at least one of DRX-InactivityTimer, DRX-ShortCycle, and DRX-ShortCycleTimer.
Abstract:
A communication control method according to one embodiment comprises transmitting, by a first base station configured to manage a cell, a message to a second base station in a specific procedure; and storing, by the second base station that receives the message, information included in the message by associating with the cell. The information includes at least one of information related to a cell size of the cell and information related to a capability of the cell for dual connectivity communication.
Abstract:
A radio terminal according to an embodiment is to be connected to a base station of WWAN (Wireless Wide Area Network). The radio terminal receives, from the base station, a setting message instructing a connection process between the radio terminal and a WLAN (Wireless Local Area Network). The setting message including timer information setting a timer for determining a failure of the connection process between the radio terminal and the WLAN. The radio terminal starts a timer based on the timer information. The radio terminal determines that the connection process has failed, if the timer expires. The radio terminal transmits, to the base station, a failure message indicating a failure of the connection process. The failure message includes information indicating that a cause of the failure of the connection process is timeout.
Abstract:
A communication method, comprises: sending, by a cellular base station configured to constitute an Evolved Universal Terrestrial Radio Access Network (E-UTRAN), a plurality of pieces of wireless LAN identification information managed by the cellular base station, to a wireless LAN termination node configured to manage a wireless LAN access point; and receiving, by the wireless LAN termination node, the plurality of pieces of wireless LAN identification information from the cellular base station. The plurality of pieces of wireless LAN identification information are sent via an interface formed between the cellular base station and the wireless LAN termination node.
Abstract:
A base station according to an embodiment comprises: a controller configured to receive an identifier of a wireless LAN access point added in a wireless LAN termination apparatus from the wireless LAN termination apparatus.
Abstract:
A target base station according to one embodiment is a target base station to which a user terminal is handed over from a source base station. The target base station includes a controller configured to, when the target base station and a secondary base station perform dual connectivity communication with the user terminal accompanying the handover, notify the secondary base station of identification information related to a serving gateway connected to the target base station.