Abstract: Convenience of an ink bottle and a bottle set is improved. An ink bottle includes: a container portion that contains ink; a guiding portion that is formed in one end portion of the container portion, and includes an outflow port from which the ink in the container portion flow out; and a cover that covers at least an end portion of the container portion on the opposite side of the guiding portion.

Abstract: This wireless communication device comprises: a sensing unit that detects the position and size of each moving object including a mobile terminal; a route prediction unit that predicts a movement route of each moving object on the basis of the position of each moving object; a communication quality prediction unit that predicts a communication quality distribution of a communication area on the basis of the predicted movement route of each moving object and the size of each moving object; and a determination unit that acquires the predicted communication quality for the predicted movement route of the mobile terminal on the basis of the communication quality distribution, and determines a communication startup timing for the mobile terminal on the basis of the predicted communication quality.

Abstract: To secure a line of sight (LOS) in wireless communication between a mobile communication device mounted on a moving object and a fixed communication device provided on a travel route of the moving object, a wireless communication system includes an LOS determiner that determines whether line of sight between the mobile communication device and the fixed communication device is secured based on position information of the fixed communication device and position information of the mobile communication device, and a travel condition determiner that, when it is determined by the LOS determiner that the line of sight is not secured, determines a travel condition of the moving object for securing the line of sight.

Abstract: A communication apparatus mounted on a vehicle includes: a camera that captures a still image used for generating a map; a positioning circuit that positions a captured position of the still image; a control circuit that associates position information indicating the captured position with image data of the still image; and a communication circuit that establishes a radio communication with a roadside unit and transmits the image data by radio to the roadside unit, in which the control circuit rearranges an transmission order of the image data to be transmitted by radio to the roadside unit, based on the position information.

Abstract: In a network having an edge server disposed therein, to appropriately construct a wireless communication route used in communication between the edge server and a user terminal, a processor of a network control device acquires group information related to grouped base stations in multiple base stations disposed in the network, acquires route information related to one or more wireless communication routes formed by multi-hop communication between the grouped base stations, and transmits the group information and the route information to an edge server connected to one of the base stations or to a user terminal.

Abstract: A communication device includes a wireless communication device, a location information acquisition device, a storage and a controller. The wireless communication device wirelessly communicates with a base station used as a connection destination. The location information acquisition device acquires location information on a location of the communication device. The storage stores historical communication information on past communication status. The controller determines a degree of risk of occurrence of reduction in an amount of available communication bandwidth beyond a tolerance limit based on the historical communication information and the location information. The controller further controls a transmission rate for communicating the data based on a result of determination of the degree of risk.

Abstract: In order to prospectively avoid communication failures or reduction in throughput of each user terminal, thereby improving users' satisfaction with communication service, a base station is configured to control wireless communication with a terminal device by using any of multiple transmission beams formed by the base station or those formed by another base station and includes a wireless communication device and a controller configured to acquire correction information used for correcting a measurement value for evaluating reception status of each transmission beam and cause the wireless communication device to transmit the correction information to the user terminal so as to thereby promote the user terminal to use, or inhibit the user terminal from using a specific transmission beam.

Abstract: To reduce power consumption and enable a quick change from one communication path to another when detecting a decrease in quality of communication for communicating user data, a first base station determines a second base station and a third base station, and then the first base station transmits a connection request message to a terminal, the second base station and the third base station concurrently with transmitting a communication request message to the second base station, and, while the second base station is in communication with the terminal, upon detecting a decrease in quality of communication with the terminal based on a reception status of an uplink signal from the terminal, the second base station transmits a path switching request message to the first base station, which in turn transfers the received path switching request message transmitted from the second base station to the third base station.

Abstract: To reduce power consumption and enable a quick change from one communication path to another when detecting a decrease in quality of communication for communicating user data, a first base station determines a second base station and a third base station, and then the first base station transmits a connection request message to a terminal, the second base station and the third base station concurrently with transmitting a communication request message to the second base station, and, while the second base station is in communication with the terminal, upon detecting a decrease in quality of communication with the terminal based on a reception status of an uplink signal from the terminal, the second base station transmits a path switching request message to the first base station, which in turn transfers the received path switching request message transmitted from the second base station to the third base station.

Abstract: A wireless terminal that: for previous communications between the wireless terminal and base stations, stores as a communication history at least position information for the wireless terminal and information pertaining to each base station; acquires the position information for the wireless terminal and, on the basis of the position information for the wireless terminal and the stored communication history, derives from multiple base stations at least a connection subject base station to be used in data communication and a connection standby base station, which is the base station having the next highest connection priority after the connection subject base station; and performs data communication when a trial connection with the connection subject base station has succeeded, and switches the connection subject base station to be used in data communication to the connection standby base station when communication with the connection subject base station is interrupted.

Abstract: A communication device includes a wireless communication device, a location information acquisition device, a storage and a controller. The wireless communication device wirelessly communicates with a base station used as a connection destination. The location information acquisition device acquires location information on a location of the communication device. The storage stores historical communication information on past communication status. The controller determines a degree of risk of occurrence of reduction in an amount of available communication bandwidth beyond a tolerance limit based on the historical communication information and the location information. The controller further controls a transmission rate for communicating the data based on a result of determination of the degree of risk.

Abstract: In order to enable efficient utilization of an available bandwidth by properly estimating the available bandwidth under conditions in which the available bandwidth significantly changes upon occurrence of communication path switching, an available bandwidth estimation is performed by estimating a current available bandwidth based on historical communication state information i.e.

Abstract: A communication device is provided and includes: a wireless communication device configured to wirelessly communicate with a base station used as a connection destination; a location information acquisition device configured to acquire location information on a location of the communication device; a storage configured to store historical obstruction information for an obstructed location where decrease in communication quality due to obstruction has occurred before; a controller configured to determine, based on the historical obstruction information and the location information, a degree of risk of occurrence of decrease in communication quality due to obstruction for at least one of a current connection destination that is currently used by the communication device and a future connection destination that is expected to be used by the communication device, and control the connection destination based on a result of determination of the degree of risk.

Abstract: In order to prevent occurrence of the significantly frequent transmission of messages, a user terminal is configured such that, when a reception power of a target cell is equal to or greater than a first threshold value ThLOW, the user terminal starts preparation for a handover to the target cell, and when the reception power is equal to or greater than a second threshold value ThHIGH, the user terminal performs the handover to the target cell, and that, until a waiting time has elapsed after performing the handover, the user terminal, by using a timer, performs a timing control for maintaining an immediate handover state in which the user terminal can immediately perform a handover, and, when the waiting time has elapsed, the user terminal ends the immediate handover state.

Abstract: A terminal device is provided and includes a location information acquisition device configured to acquire location information including a location of the terminal device, a storage configured to accumulate history information on past communication status including a communication time of the terminal device at each location, and a controller configured to acquire the history information for a current location of the terminal device from the storage based on the location information, to extract one or more connection destinations as targets of communication quality measurement from connection destination candidates based on communication times for the connection destination candidates, and to measure communication quality levels of communications with the extracted connection destinations.

Abstract: When playback of content has been requested, the terminal device according to the present invention determines whether or not an edge server has cache data for the content on the basis of information that is received from the edge server and that relates to the cache data retained by the edge server, and if it is determined that the edge server has cache data for the content, the terminal device determines whether or not the terminal device is communicating with the edge server via a base station capable of high-speed or high-capacity communication. If it is determined that the communicating base station is capable of high-speed or high-capacity communication, then the terminal device transmits, to the edge server, a request to change the delivery control method for the cache data for the content.

Abstract: A wireless terminal capable of communicating with multiple wireless base stations through a network in which multiple wireless communication methods are used in a mixed manner. A storage unit stores, as a communication history, at least location information for the wireless terminal and information pertaining to the wireless base station at the time of communication with each wireless base station. An acquisition unit acquires the location information for the wireless terminal. On the basis of the acquired location information for the wireless terminal and the communication history stored in the storage unit a derivation unit derives a connection base station from the multiple wireless base stations, as the wireless base station to be used in data communication. A communication unit performs data communication with the derived connection base station.

Abstract: In order to prevent occurrence of the significantly frequent transmission of messages, a user terminal is configured such that, when a reception power of a target cell is equal to or greater than a first threshold value ThLOW, the user terminal starts preparation for a handover to the target cell, and when the reception power is equal to or greater than a second threshold value ThHIGH, the user terminal performs the handover to the target cell, and that, until a waiting time has elapsed after performing the handover, the user terminal, by using a timer, performs a timing control for maintaining an immediate handover state in which the user terminal can immediately perform a handover, and, when the waiting time has elapsed, the user terminal ends the immediate handover state.

Abstract: In order to prospectively avoid communication failures or reduction in throughput of each user terminal, thereby improving users' satisfaction with communication service, a base station is configured to control wireless communication with a terminal device by using any of multiple transmission beams formed by the base station or those formed by another base station and includes a wireless communication device and a controller configured to acquire correction information used for correcting a measurement value for evaluating reception status of each transmission beam and cause the wireless communication device to transmit the correction information to the user terminal so as to thereby promote the user terminal to use, or inhibit the user terminal from using a specific transmission beam.

Abstract: There is provided a wireless base station device capable of reducing a communication delay time related to communication of a priority call. A wireless base station device includes a processor a memory, and an antenna. The memory stores a wireless resource allocated to a priority call of radio channels for transmission of data with a wireless communication terminal before a priority call is generated under the control of the processor. The processor allocates the wireless resource stored in the memory to a generated priority call. The antenna performs communication of data of the priority call by using the allocated wireless resource.