Abstract: In a power conversion device for performing conversion from DC to AC, a positive-side capacitor and a negative-side capacitor with their connection point serving as a neutral point are provided between the positive and negative sides of the inputted DC power, and a switching pattern for specifying switching phases which are timings of ON/OFF driving switching elements of an inverter which outputs AC voltage having at least a positive-side potential, a negative-side potential, and a neutral point potential, is calculated so as to satisfy conditions for ensuring a modulation factor, eliminating harmonic components for respective orders of output voltage, ensuring a predetermined value for a phase difference between adjacent switching phases, and balancing voltage of the positive-side capacitor and voltage of the negative-side capacitor.

Abstract: In a power conversion device for performing conversion from DC to AC, a positive-side capacitor (5a) and a negative-side capacitor (5b) with their connection point serving as a neutral point are provided between the positive and negative sides of the inputted DC power, and a switching pattern for specifying switching phases which are timings of ON/OFF driving switching elements (6) of an inverter (4) which outputs AC voltage having at least a positive-side potential, a negative-side potential, and a neutral point potential, is calculated so as to satisfy conditions for ensuring a modulation factor, eliminating harmonic components for respective orders of output voltage, ensuring a predetermined value for a phase difference between adjacent switching phases, and balancing voltage of the positive-side capacitor (5a) and voltage of the negative-side capacitor (5b).

Abstract: A mobile terminal 3 judges whether or not the mobile terminal is able to make a transition to a DTX period during Active, and, when judging that the mobile terminal is able to make a transition to a DTX period during Active, notifies a base station 2 to that effect. If the base station 2 judges that the mobile terminal is able to make a transition to a DRX period during Active when triggered by the notification from the mobile terminal 3, the base station temporarily stops supply of electric power to the data transmission processing units and the data reception processing units of the mobile terminal 3.

Abstract: A mobile terminal 3 judges whether or not the mobile terminal is able to make a transition to a DTX period during Active, and, when judging that the mobile terminal is able to make a transition to a DTX period during Active, notifies a base station 2 to that effect. If the base station 2 judges that the mobile terminal is able to make a transition to a DRX period during Active when triggered by the notification from the mobile terminal 3, the base station temporarily stops supply of electric power to the data transmission processing units and the data reception processing units of the mobile terminal 3.

Abstract: A mobile terminal 3 judges whether or not the mobile terminal is able to make a transition to a DTX period during Active, and, when judging that the mobile terminal is able to make a transition to a DTX period during Active, notifies a base station 2 to that effect. If the base station 2 judges that the mobile terminal is able to make a transition to a DRX period during Active when triggered by the notification from the mobile terminal 3, the base station temporarily stops supply of electric power to the data transmission processing units and the data reception processing units of the mobile terminal 3.

Abstract: A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit.

Abstract: In a communications system which complies with LTE including a base station which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal, in a case in which an uplink scheduling request signal is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal is transmitted.

Abstract: A drive control apparatus for multiple-winding motor includes: a modulation rate phase command generation unit which calculates currents of first and second inverters for driving a multiple-winding three-phase motor and generates a modulation rate command and a phase command for equalizing the currents; a pulse number determination unit which determines the number of pulses per half cycle on the basis of a frequency command; a pattern table for storing switching patterns; and gate signal generators which control the first and second inverters, using an optimal switching pattern based on the number of pulses, wherein the modulation rate phase command generation unit performs control for equalizing currents of the first and second inverters, and the phase or frequency at which the control is performed is changed in accordance with any of the number of pulses, the modulation rate, the frequency command, and the switching pattern.

Abstract: A data communication method implemented by a communication system including transmitting data by a base station using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, transmitting to the base station, by a mobile terminal, a response signal in accordance with a result of reception of the data transmitted from the base station, transmitting to the base station, by the mobile terminal, a scheduling request signal to make a request for allocation of radio resources before transmitting data to the base station, and transmitting the response signal to the base station, a scheduling request signal to the base station, and a control process of, when a transmission timing of the response signal transmission process coincides with that of the scheduling request signal transmission process, allowing a radio resource for transmission of the scheduling request signal to be shared with transmission of the response signal.

Abstract: A switching pattern determination unit in a control unit includes a modulation rate ensuring unit, a harmonic reducing unit, and a function combining unit, and sets a function f prescribing the relationship between each switching phase and a modulation rate, a function Y prescribing the relationship between each switching phase and the sum of squares of values obtained by multiplying a harmonic component of each order by a weighting coefficient of each order, and an evaluation function X formed from the function Y, the function f, and a weighting variable. Then, by a switching phase calculation unit and a switching pattern storage unit, each switching pattern according to each modulation rate m and each number of pulses is obtained and stored which ensures the modulation rate and reduces an addition value of harmonic components of respective orders.

Abstract: A switching pattern determination unit in a control unit includes a modulation rate ensuring unit, a harmonic reducing unit, and a function combining unit, and sets a function f prescribing the relationship between each switching phase and a modulation rate, a function Y prescribing the relationship between each switching phase and the sum of squares of values obtained by multiplying a harmonic component of each order by a weighting coefficient of each order, and an evaluation function X formed from the function Y, the function f, and a weighting variable. Then, by a switching phase calculation unit and a switching pattern storage unit, each switching pattern according to each modulation rate m and each number of pulses is obtained and stored which ensures the modulation rate and reduces an addition value of harmonic components of respective orders.

Abstract: A drive control apparatus for multiple-winding motor includes: a modulation rate phase command generation unit which calculates currents of first and second inverters for driving a multiple-winding three-phase motor and generates a modulation rate command and a phase command for equalizing the currents; a pulse number determination unit which determines the number of pulses per half cycle on the basis of a frequency command; a pattern table for storing switching patterns; and gate signal generators which control the first and second inverters, using an optimal switching pattern based on the number of pulses, wherein the modulation rate phase command generation unit performs control for equalizing currents of the first and second inverters, and the phase or frequency at which the control is performed is changed in accordance with any of the number of pulses, the modulation rate, the frequency command, and the switching pattern.

Abstract: In a communications system which complies with LTE including a base station which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal, in a case in which an uplink scheduling request signal is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal is transmitted.

Abstract: In a communications system which complies with LTE including a base station 2 which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal 3, in a case in which an uplink scheduling request signal SR is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal SR is transmitted.

Abstract: A mobile terminal 3 judges whether or not the mobile terminal is able to make a transition to a DTX period during Active, and, when judging that the mobile terminal is able to make a transition to a DTX period during Active, notifies a base station 2 to that effect. If the base station 2 judges that the mobile terminal is able to make a transition to a DRX period during Active when triggered by the notification from the mobile terminal 3, the base station temporarily stops supply of electric power to the data transmission processing units and the data reception processing units of the mobile terminal 3.

Abstract: A mobile communications system including a mobile terminal 1 and a base station 2 which relays communications between a network and the mobile terminal 1, in which the base station 2 can deliver information to the mobile terminal 1 by using an MBMS, in which the base station 2 sets a flag indicating presence or absence of emergency information to a control channel used for the MBMS, and notifies the presence or absence of the emergency information to the mobile terminal 1 by using the description of the flag set to the control channel for the MBMS.

Abstract: A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit.

Abstract: In accordance with the present invention, in a case of using persistent scheduling, when detecting a transition from a talk state to a silent state, resources to be allocated during a silent state are allocated to a channel exclusive for silent period, and the resources which have been allocated to a mobile terminal during the talk spurt are released. Therefore, the useless allocation of resources can be reduced, and the throughput of the system can be improved.

Abstract: In accordance with the present invention, in a case of using persistent scheduling, when detecting a transition from a talk state to a silent state, resources to be allocated during a silent state are allocated to a channel exclusive for silent period, and the resources which have been allocated to a mobile terminal during the talk spurt are released. Therefore, the useless allocation of resources can be reduced, and the throughput of the system can be improved.

Abstract: In a communications system which complies with LTE including a base station 2 which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal 3, in a case in which an uplink scheduling request signal SR is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal SR is transmitted.