Hitachi, Ltd.

Samsung Electronics Co., Ltd.

Yasuaki Takahara

Kazutoshi Higuchi

Teiji Okamoto

Shigeyuki Sudo

Fumitaka Itoh

Katsuo Ogawa

Yoshihiro Kanomata

Hiroyuki Tomihara

Jun Yamada

Toru Tanaka

Tetsuya Ikeda

Katsumi Takeda

Tomohiro Esaki

Kosaku Aida

Atsuki Edamura

Tomohiro Ezaki

Shuuichi Sekiguchi

A cellular mobile telephone apparatus has circuits for generating messages, a storage circuit for storing messages, and transmitter/receiver circuit for transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

Message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method

Response message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method

A cellular mobile telephone apparatus has circuits for generating massages, a storage circuit for storing messages, and a transmitter/receiver circuit for transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

Cellular mobile telephone apparatus

A cellular mobile telephone apparatus has circuits for generating messages, a storage circuit for storing messages, and transmitter/receiver circuit or transmitting a message. When the user of the cellular mobile telephone apparatus cannot immediately respond to an incoming call, a desired one of a plurality of previously generated and stored messages can be transmitted to a calling party through simple key manipulations or by other means.

A cellular mobile telephone system including a cellular mobile telephone apparatus and a peripheral apparatus communicating bidirectionally. The cellular mobile telephone apparatus may include: a modulating/demodulating device demodulating radio frequency signals into a digital signal including a control signal; a controlling device controls operation of the cellular mobile telephone apparatus in accordance with the control signal; a first communicating device performs bidirectional communication, including transmitting a first control information controlling operation of the peripheral apparatus. The peripheral apparatus may include: an inputting device for inputting a second control information; a second communication device performing bidirectional communication with the cellular mobile telephone apparatus; and a control device controlling operation of the peripheral apparatus in accordance with the first control information, and performing control of the cellular mobile telephone apparatus through the communication device according to the second control information for changing a mode of the cellular mobile telephone apparatus.

Cellular mobile telephone apparatus and an alarm device therefor

A cellular mobile telephone apparatus including a main body, and an alarm device which is provided separately from the main body, the main body including: receiving/transmitting unit for receiving and transmitting radio frequency signals between a base station; modulating/demodulating unit for modulating and demodulating between the radio frequency signals, and a conversation signal and a control signal; telephone receiver unit for reproducing audible conversation voice in response to the demodulated conversation signal from the modulating/demodulating unit; telephone transmitting unit for converting conversation voice into the conversation signal; a controller for controlling operation of the main body of the cellular mobile telephone apparatus in accordance with the control signal; and an alarm device for providing an alarm signal which includes an identification information and is transmitted through the radio frequency, when a call is terminated at the main body; and the alarm device including: receiving unit for receiving the alarm signal of radio frequency; a discriminator for discriminating the alarm signal assigned to itself from others by the identification information included therein; and an alarm unit for alarming call termination in response to the identification by the discriminator.

A cordless telephone apparatus has a base station connected to a public telephone network and assigned with a specific identification code and one or more personal stations linked to the base station through the medium of radio frequencies. The base station has one or more additional functions in addition to the speech function. The personal station can perform radio communications with the base station within a range in which radio waves from the base station is receivable and can perform radio communications with a cell station connected to a public telephone network outside the radio wave receivable range. The personal station has a remote-control instruction unit for instructing operation of the additional function of the base station. The personal station has a communication station decision unit for deciding which one of the base station and cell station can radio-communicate with the personal station, a storage unit for storing a specific identification code of the base station and a control code corresponding to the additional function, a DTMF signal generation unit for converting the given control code into a DTMF signal in accordance with a predetermined conversion rule, and a controller.

Cordless telephone apparatus

A speech message recording and reproducing method and apparatus wherein a speech message associated with a facsimile transmission is stored in a communication apparatus having an automatic answering telephone apparatus associated with a facsimile apparatus. Information of the speech apparatus including at least a storage address thereof is converted to an optical pattern for printing on a recording paper. The printed optical pattern is optically detected, interpreted and transmitted by radio communication to the communication apparatus and the speech message stored at the storage address is reproduced. The optical pattern is read by a reader forming part of a portable telephone unit.

Speech message recording and reproducing method and apparatus

The number of oscillators required to construct a digital radiocommunication terminal can be reduced and a circuit used for the digital radiocommunication terminal can be reduced in size. For this purpose, the digital radiocommunication terminal for effecting information transmission using an N (integer)-phase-shift-keyed signal (identification symbol number N=4 upon .pi./4 shifted QPSK modulation), is constructed such that an oscillation frequency generated from a reference oscillator employed with a frequency synthesizer is selected to have a common multiple of a second intermediate frequency and an identification symbol phase N and is supplied to a detector for outputting received data therefrom.

Digital radiocommunication terminal

A communication system which includes a receiving section having a frequency convertor for converting a received signal into an intermediate frequency signal by mixing with a local oscillation signal, and a demodulator for demodulating the received signal converted into the intermediate frequency signal, a transmission section for modulating a transmission signal received thereby, to transmit the so modulated signal, and an input/output section for receiving the demodulated signal from the receiving section and outputting it externally and receiving the transmission signal externally and outputting it to the transmission section. The receiving section includes a local oscillator for generating the local oscillation signal, reference frequency generator for generating a reference signal, calibration signal generator for generating a calibration signal having a predetermined frequency based upon the reference signal, to input the calibration signal to the frequency converter, counter for counting the frequency of the intermediate frequency signal, and corrector for detecting a frequency error based upon the counted value of the intermediate frequency signal. The frequency converter converts the calibration signal into the intermediate frequency signal by mixing with the local oscillation frequency. The counter counts the frequency of the calibration signal converted by the frequency converter as the intermediate frequency signal. The corrector detects the frequency error from a frequency difference between the counted value of the calibration signal and a predetermined intermediate frequency reference value, thereby generating a signal for frequency correction based upon the thus detected frequency error.

Communication system having oscillation frequency calibrating function

A mobile communications equipment which communicates with another equipment through a base station, and in which the state change of the mobile communications equipment based on the movement thereof, such as the movement from outside a service area into the service area, is detected and is notified to the user of the mobile communications equipment. The notification is given by a method comprising the steps of accepting an instruction as to whether or not the user is to be notified that the state change has occurred between a state in which the equipment is communicable and a state in which it is incommunicable; analyzing if the communications are possible, on the basis of a signal sent from the base station, subject to the instruction of giving the notification; detecting the state change from the incommunicable state into the communicable state on the basis of the analyzed result; and notifying the user of the occurrence of the state change into the communicable state in response to the detection of the state change, by at least one notifying expedient selected from among production of a voice message, a notifying sound, a notifying light, and vibrations.

Mobile communications equipment which detects and notifies when it is

A .pi./4 shift QPSK modulator for receiving digital signals and for outputting a modulated signal therefrom in accordance with each of the inputted digital signals. The .pi./4 QPSK modulator is utilized in a communication apparatus and includes a counter for counting the number of the inputted digital signals, a phase information arithmetic unit for receiving a value of an output from the counter and a value of each of the inputted digital signals for outputting phase information of the signal to be modulated, an arithmetic unit for performing an arithmetic operation on values representing an impulse response of the output phase information from the phase information arithmetic unit and outputting impulse response values in accordance therewith, and an accumulating unit for accumulating impulse response values outputted from the arithmetic unit and for performing an arithmetic operation for enabling generation of a .pi./4 shift QPSK modulated signal.

Growing community of inventors

Yokohama, Japan

Yasuaki Takahara