Abstract: In a time-division multiplexing wireless communication system, an antenna module has plural antenna elements. Receiver high-frequency circuit synthesizes signals from the antenna elements according to an antenna directivity having a desired beam pattern. Demodulator selects one of the received signals from wireless terminals according to the synthesized received signals, and determines transmission beam direction information for use in directing the beam in the selected direction. Weighting circuit generates weight coefficients for setting of the beam patterns and transmission beam directions according to the transmission beam direction information, and produces transmission time slots according to a table listing the relations of the transmission beam directions and the time slots for use in the beam radiation in those directions.

Abstract: A radio base station, comprising: a time slot preparing unit for preparing a time slot to be transmitted to a radio terminal; a selecting unit for selecting a modulation system and a coding method of the time slot prepared by the preparing unit; a signal processing unit for modulating and coding the time slot prepared by the preparing unit according to the modulation system and the coding method, which are selected by the selecting unit; an amplifying unit for amplifying a slot modulated and coded by the signal processing unit; a controlling unit for controlling the amplifying unit to amplify a transmitting power of a specified priority slot among the plurality of time slots so as to be larger than that of a non-priority slot; and an antenna unit for transmitting the time slot amplified by the amplifying unit.

Abstract: Disclosed is a control apparatus capable of more effectively utilizing radio resources. Mobile stations positioned close to each other are treated as one group and a direction and width (radiation angle) of a beam radiated from an adaptive array antenna 11 is controlled for each group so that one beam capture one group. To be concrete, a plurality of mobile stations are classified into groups by a classification section 19, and an area to which each group moves is estimated by a directivity determination section 20. The adaptive array antenna 11 is controlled by the directivity control section 15 so that one beam can cover an area in which one group is positioned and the area to which this one group moves.

Abstract: A mobile radio communications system having a plurality of base stations accommodating a plurality of mobile stations through radio transmission channels, each of the base stations being connected to a mobile communications exchanger through a plurality of signal lines. Each of the base stations is provided therein with a signal line allocating function unit for selecting a particular signal line from a plurality of signal lines and for allocating a communication slot for a mobile station dominated by the base station at a particular slot position on the selected signal line, a radio channel allocating function unit for allocating a communication slot for the mobile station dominated by the base station at a particular slot position on a radio transmission channel at a particular frequency, and a radio signal delay control unit for performing delay control for a timing at which the base station transmits a radio signal to the mobile station dominated by the base station.

Abstract: A mobile communication system which includes an exchange, a plurality of base stations, and a plurality of radio telephone sets communicatable with the associated base stations. In order to suppress or reduce call loss caused by traffic congestion or by faulty one of the base stations, an uncommunicatable service area of the faulty base station is covered by the other working base stations. The exchange detects operation states of all the base stations, searches a base-station state pattern table within the exchange for base-station control data suitable for the operation states to read out the base-station control pattern, and transmits the read-out base-station control data to the base stations to cause radio service areas of the base stations to be set to have desired radiation patterns according to the read-out base-station control data.

Abstract: A mobile communication system which includes an exchange, a plurality of base stations, and a plurality of radio telephone sets communicatable with the associated base stations. In order to suppress or reduce call loss caused by traffic congestion or by faulty one of the base stations, an uncommunicatable service area of the faulty base station is covered by the other working base stations. The exchange detects operation states of all the base stations, searches a base-station state pattern table within the exchange for base-station control data suitable for the operation states to read out the base-station control pattern, and transmits the read-out base-station control data to the base stations to cause radio service areas of the base stations to be set to have desired radiation patterns according to the read-out base-station control data.

Abstract: A mobile radio communications system having a plurality of base stations accommodating a plurality of mobile stations through radio transmission channels, each of the base stations being connected to a mobile communications exchanger through a plurality of signal lines. Each of the base stations is provided therein with a signal line allocating function unit for selecting a particular signal line from a plurality of signal lines and for allocating a communication slot for a mobile station dominated by the base station at a particular slot position on the selected signal line, a radio channel allocating function unit for allocating a communication slot for the mobile station dominated by the base station at a particular slot position on a radio transmission channel at a particular frequency, and a radio signal delay control unit for performing delay control for a timing at which the base station transmits a radio signal to the mobile station dominated by the base station.

Abstract: In a mobile communication system employing code division multiple accesses and having radio logical channels such as control channels and traffic channels, for the purpose of interference cancellation processing which is implemented without a large processing delay even under a call control application, the baseband receiving part of the mobile communication system includes a common control channel demodulator 302 which executes the demodulation processing of a common control channel as to a received baseband reception signal 301, an interference canceller 309 which executes interference cancellation processing for a received multiplexed signal on the basis of the notification information of the control channels, and a synthesis/error correction processor 315 which executes error correction processing, etc. as to user information having undergone the interference cancellation processing and thereafter executes frame formation processing.

Abstract: A mobile communication system which includes an exchange, a plurality of base stations, and a plurality of radio telephone sets communicatable with the associated base stations. In order to suppress or reduce call loss caused by traffic congestion or by faulty one of the base stations, an uncommunicatable service area of the faulty base station is covered by the other working base stations. The exchange detects operation states of all the base stations, searches a base-station state pattern table within the exchange for base-station control data suitable for the operation states to read out the base-station control pattern, and transmits the read-out base-station control data to the base stations to cause radio service areas of the base stations to be set to have desired radiation patterns according to the read-out base-station control data.

Abstract: A mobile radio communications system having a plurality of base stations accommodating a plurality of mobile stations through radio transmission channels, each of the base stations being connected to a mobile communications exchanger through a plurality of signal lines. Each of the base stations is provided therein with a signal line allocating function unit for selecting a particular signal line from a plurality of signal lines and for allocating a communication slot for a mobile station dominated by the base station at a particular slot position on the selected signal line, a radio channel allocating function unit for allocating a communication slot for the mobile station dominated by the base station at a particular slot position on a radio transmission channel at a particular frequency, and a radio signal delay control unit for performing delay control for a timing at which the base station transmits a radio signal to the mobile station dominated by the base station.

Abstract: A telephone communication terminal responsive to a voice for originating a call includes an antenna, a diplexer, a radio unit, a base band unit, a controller, a loudspeaker, a microphone, a key input and display unit, a sound level measuring instrument, threshold generators, comparators, an analyzer, and a destination number storage. The sound level measuring instrument always measures the sound level of an input signal, such as a voice inputted from the microphone. The sound level measuring instrument conducts processing such as calculating signal power at fixed intervals. The output of the sound level measuring instrument is compared in a first comparator with the output of a first threshold generator outputting a preset threshold value. In the case where the output of the sound level measuring instrument is greater than the threshold value, a result of comparison is conveyed to the controller. The analyzer effects an analysis on an input signal and outputs information.

Abstract: In a radio paging system and a radio paging method, in which all transmitters are simply synchronized with each other with a satisfactory precision. A central exchange and each transmitter are each provided with a GPS clock for measuring time according to a current time transmitted from the GPS clock. An encoder of the central exchange adds to a message received from a network a real time, which is information to specify time to send the message from each transmitter, according to the current time measured by the GPS clock thereof and then distributes the message to the transmitters. A synchronizing section of each transmitter sends from a transmitting unit the message distributed from the central exchange to a receiver at a time specified by the real time added to the message according to the current time measured by the GPS clock thereof.

Abstract: The invention is directed to an ignition coil for an internal combustion engine which includes a first case which has at least an opening portion at its bottom, a primary winding and a secondary winding which are received in the first case, a secondary terminal which is electrically connected to the secondary winding and placed within the first case in the vicinity of the opening portion at the bottom of the first case, and a second case which has a cover portion connected with the opening portion at the bottom of the first case, and which has a cylindrical portion extending from the cover portion. The ignition coil further includes a high-tension terminal which has a shaft held on a central axis of the cylindrical portion of the second case, and which is electrically connected to the secondary terminal. Then, a synthetic resin is filled in the first case and the second case connected therewith so as to fix and insulate the primary winding, secondary winding, secondary terminal and high-tension terminal.

Abstract: The invention is directed to an ignition coil for an internal combustion engine which includes a housing having therein a first core, a second core which is received in the housing and magnetically connected to the first core for forming a magnetic path therewith, a bobbin having a cylindrical portion for receiving therein the second core with an end face thereof exposed to the outside of the cylindrical portion, a primary winding wound around the bobbin, a secondary winding wound around the primary winding in co-axial relationship therewith, and a permanent magnet which is disposed between the first core and the second core. The permanent magnet has a planar surface connected to the end face of the second core, and an extending end portion which extends out of the end face of the second core. The housing and the bobbin are arranged to enclose the extending end portion of the permanent magnet.

Abstract: The detection of any transmission error having developed between a central station and a transmitting station, and the start of a counterplan to the transmission error are realized by a simple construction. The central station transmits messages to which error correcting codes for correcting the transmission errors of the respective messages are affixed, to receivers via the transmitting stations through radio communications. Each of the receivers corrects the transmission error which has developed in relation to the message received through the radio communications, by the use of the error correcting code affixed to the particular message.

Abstract: The invention is directed to an ignition coil for use in an internal combustion engine. The ignition coil includes a core and a bobbin in which at least a part of the core is received. Primary and secondary windings are wound around the bobbin. A secondary terminal is mounted on the bobbin, and a high-tension terminal is mounted on a housing. The secondary terminal is formed in a Y-letter shape with its body portion and a pair of leg portions. The high-tension terminal is formed with a recess, in which the leg portions of the secondary terminal are received. Each of the leg portions has a projection which is biased to contact with the inner surface of the recess.

Abstract: The invention is directed to an ignition coil for an internal combustion engine which includes a columnar member having a plurality of magnetic plates, e.g., silicon steel plates stacked one on the other, each of which is a flat plate with its opposite ends having a width greater than that of its middle portion. Each silicon steel plate has a middle portion whose width is gradually increased from the plates placed at the opposite sides of the columnar member to the plate placed in the center of the columnar member, to form a circular cross section. Whereas, the opposite end portions of the columnar member have a rectangular cross section which is greater in area than the circular cross section of the middle portion, respectively. A plurality of recesses are formed on one side of each steel plate, and a plurality of protrusions are formed on the other side of each steel plate.

Abstract: An inner core for an ignition coil is inserted into a bobbin, around which a primary winding and a secondary winding are disposed. An outer core is inserted into a housing to form a magnetic circuit with the inner core. A magnet member, which is made of a permanent magnet material such as Sm.sub.1 Co.sub.5, is connected to the inner core. The bobbin, which is assembled with the inner core, the magnet member, the primary and secondary windings, is inserted into the housing, with the magnet member positioned between the inner core and the outer core, and then the inside of the housing is molded by a synthetic resin. Thereafter, the magnet member is magnetized to provide a predetermined magnetic force. The magnet member may be molded by Sm.sub.1 Co.sub.5 to form a plate having a thickness of 1.5 mm and more.

Abstract: In a mobile radio communication system employing a time-division multiple transmission scheme, having a plurality of base stations and a plurality of personal stations, an arbitrary base station, when detecting a pilot signal transmitted from any master base station in the mobile radio communication system, acts as a slave base station which does not transmit its pilot signal but transmits and receives a common control signal to and from a personal station utilizing a frequency channel occupied by the pilot signal. On the other hand, when not receiving the pilot signal, the base station searches for an available frequency channel, and acts as a master base station which transmits its pilot signal on the available frequency channel to occupy the frequency channel, and transmits and receives the common control signal to and from a personal station on that frequency channel.

Abstract: A screen communication method and system for communicating screen data between a plurality of interconnected terminal units each having a display part and an input part, wherein each time screen modifying data is input from the display part, each of the terminal units transmits a modifying right request to another terminal unit before transmitting the screen modifying data, and obtains a modifying right under such a condition that each terminal unit receives no screen modifying request from another terminal unit within a predetermined period of time after the transmission of the first modifying right request.