Abstract: A base station synchronization system, a synchronization controller, and a base station are provided that are capable of establishing precise synchronization among a plurality of base stations. In a base station synchronization system including a plurality of base stations and a base station concentrator, the base station concentrator includes a control information generator for generating synchronization control information, and each base station includes a VCO oscillating at a frequency corresponding to an input control voltage, and a corrector for correcting the input control voltage to the VCO according to the synchronization control information. This configuration makes it possible to establish synchronization among the master clocks of the plurality of base stations so as to suppress phase differences among the base stations and precisely synchronize the base stations with each other.

Abstract: In a mobile communication system, a mobile station is configured to obtain data quality information, and provides the obtained data quality information to a base station A when it is quality information about data from the base station A, and provides the data quality information to a base station B when it is quality information about data from the base station B. The base stations A and B are configured to provide a base station host apparatus with the quality information from the mobile station as historical information about the mobile station, and the base station host apparatus is configured to compare the pieces of quality information sent from the two base stations, select one base station with better quality, instructs it to communicate with the mobile station, and instructs the other not to communicate with the mobile station.

Abstract: When a judging unit judges that there is no mobile-apparatus transmission data, a first generating unit decreases a reference value for generating a transmission-power control command, by a value equivalent to an amount of an outer-loop adjustment. A second generating unit compares generated reference value and a line quality that is measured by a measuring unit, when the former is larger than the latter, generates a transmission-power control command for reducing a transmission power of the mobile apparatus, and when the former is smaller than the latter, generates a transmission-power control command for increasing the transmission power of the mobile apparatus.

Abstract: In a mobile communications system in which a mobile station is capable of communicating simultaneously with a plurality of base stations, the resources of the plurality of base stations are managed under the control of the mobile station. For example, the mobile station specifies a resource to a base station with a resource specifying signal, the mobile station specifies a resource to a base station with a resource specifying signal, and the mobile station specifies a resource to a base station with a resource specifying signal.

Abstract: A wireless communication system and a wireless communication device capable of performing communication by each transmission signal without mutual interference, when a plurality of transmission signals of different communication systems or the same communication systems exist within the same frequency band. The system includes a first wireless communication device, a second wireless communication device, a third wireless communication device, and a fixed band-pass filter and a variable band-pass filter in the third wireless communication device. The first wireless communication signal includes control information indicating a variable pass band in the variable band-pass filter, and the control information is given to the variable band-pass filter, thereby allowing the first wireless communication signal to be selectively passed through the variable band-pass filter, while removing the second wireless communication signal.

Abstract: A wireless communication device including a sending data amount determination unit, a data sending unit, a monitor function unit, a transmission control data producing unit, a transmission control data sending unit, a data reception unit, and an application I/F (interface) unit. The transmission control data sending unit includes a transmission control data separation unit, a transmission control data replication unit, and a data mapping unit.

Abstract: A technique of being capable to decrease the number of times of delivery and receipt of information on a common channel setup between a base station equipment and a base station control equipment. A communication system includes base station equipment and a base station control equipment which controls the base station equipment. The base station control equipment is capable of supplying information necessary for the common channel setup to the base station equipment, and the base station equipment produces a track-record notification signal indicating a track record of the common channel setup while performing the common channel setup on the basis of the information. The base station control equipment does not supply the information necessary for the common channel setup when receiving the track-record notification signal from the base station equipment.

Abstract: In a mobile radio network in which synchronous base stations and asynchronous base stations coexist, according to handover destination base station candidate information transmitted from a base station to a mobile station, effective time information indicating either an effective time during which it is guaranteed that a signal from a base station candidate included in the handover destination base station candidate information can be detected when, after a lapse of an integral multiple of a fixed time interval from a time when the mobile station could detect a reference signal which were transmitted at the fixed time intervals from the base station candidate, the mobile station detects the same base station candidate again, the effective time depending on the base station candidate, or an index for enabling the mobile station to drive the effective time is provided to the mobile station, and the mobile station carries out the detection by setting up the detection time intervals at which the mobile station de

Abstract: A first frame member has an accommodating section adapted to accommodate a rolled sheet at a rear side of the first frame member. A print head is operable to perform printing with respect to a part drawn out from the rolled sheet. A second frame member is provided with the print head and supported on a front side of the first frame member so as to be movable between a first position and a second position. A locking mechanism locks the second frame member at the first position. A release lever releases the locked state of the second frame member when the release lever is pulled toward the second frame member. User access with respect to at least the accommodating section is allowed when the second frame member is placed in the second position.

Abstract: A wireless communication technique capable of maintaining excellent communication quality. A wireless communication system includes base station equipment. The base station equipment is capable of performing wireless communication with a plurality of mobile units. The base station equipment detects the mobile units which are not synchronized with the base station equipment. Then, the base station equipment limits the transmission power to the mobile units detected.

Abstract: The present invention relates to a radio communications system and a radio communications method, and an object of the invention is to readily reduce the occurrence of collisions of contention channels. In order to achieve the object, radio resources are assigned in different orders between one radio communication and another one radio communication.

Abstract: In a mobile communication system, a mobile switching center 27 changes a transmission rate of communication data transmitted from a mobile station 16 and so on to a database 11 or a transmission rate of communication data transmitted from the database 11 to the mobile station 16 and so on, on a basis of a request from the mobile station 16 and so on or the database 11, individually and independently.

Abstract: A transmitting station includes: an error detecting code attachment block that attaches error detecting codes respectively to a plurality of data pieces; a transmitter block that transmits the plurality of data pieces with the error detecting codes attached thereto to a receiving station by using different radio frequencies, respectively; a receiver block that receives, from the receiving station, the results of error detections that the receiving station applies respectively to the plurality of data pieces on the basis of the error detecting codes attached respectively to the plurality of data pieces; and a transmission data managing block that controls retransmission of the data to the receiving station on the basis of the received results of the error detection.

Abstract: [Object] A base station synchronization system, a synchronization controller, and a base station are provided which are capable of establishing precise synchronization among a plurality of base stations. [Solving Means] In a base station synchronization system including a plurality of base stations 13 and a base station concentrator 12, the base station concentrator 12 includes a control information generator 21 for generating synchronization control information, and each base station 13 includes a VCO 30 oscillating at a frequency corresponding to an input control voltage, and a corrector 33 for correcting the input control voltage to the VCO 30 according to the synchronization control information. This configuration makes it possible to establish synchronization among the master clocks of the plurality of base stations so as to suppress phase differences among the base stations and precisely synchronize the base stations with each other.

Abstract: In a mobile communication system, a mobile switching center 27 changes a transmission rate of communication data transmitted from a mobile station 16 and so on to a database 11 or a transmission rate of communication data transmitted from the data 11 to the mobile station 16 and so on, on a basis of request from the mobile station 16 and so on or the database 11, individually and independently.

Abstract: A wireless base station (11) includes a wireless communication unit (17) and a clock signal generation unit (20). The clock signal generation unit (20) includes a voltage-controlled oscillation unit (21) that outputs a clock signal of an oscillating frequency according to an inputted control voltage, a time information generation unit (22) that generates time information based on the clock signal, a time information comparison unit (23) that compares the time information with reference time information; and a control voltage instruction unit (24) that instructs a control voltage according to the comparison result to the voltage-controlled oscillation unit (21). Accordingly, the oscillating frequency of the clock signal can be kept easily and highly precisely.

Abstract: A base station control apparatus for controlling a radio base station which carries out radio communications with a mobile communication terminal is characterized in that it includes a control unit for performing a control process of making the radio base station selectively perform either of two or more processes with different throughputs according to the scale of the radio base station. With this structure, the radio base station can have only a function based on to the scale thereof. For this reason, by omitting unnecessary functions, the radio base station can be miniaturized and the manufacturing cost of the radio base station can be reduced.

Abstract: In a mobile communication system, a mobile switching center changes a transmission rate of communication data transmitted from a mobile station and so on to a database or a transmission rate of communication data transmitted from the database to the mobile station and so on, on a basis of a request from the mobile station and so on or the database individually and independently.

Abstract: When a judging unit judges that there is no mobile-apparatus transmission data, a first generating unit decreases a reference value for generating a transmission-power control command, by a value equivalent to an amount of an outer-loop adjustment. A second generating unit compares generated reference value and a line quality that is measured by a measuring unit, when the former is larger than the latter, generates a transmission-power control command for reducing a transmission power of the mobile apparatus, and when the former is smaller than the latter, generates a transmission-power control command for increasing the transmission power of the mobile apparatus.

Abstract: A base station communicates with a mobile station in a mobile communication system. The base station includes a directivity control unit that controls transmission of a first antenna beam encoded for identification by using a first code, and a second antenna beam encoded for identification by using a second code different from the first code. The first antenna beam rotates clockwise, and the second antenna beam rotates counterclockwise.