Patent application number | Description | Published |
20090052417 | WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes: a detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the detection part corresponds to a predetermined identifier; and a power source control unit controlling a power source based on a result of a judgment in the judgment part. | 02-26-2009 |
20090067345 | RADIO TERMINAL, RADIO SYSTEM, AND PROGRAM - A radio terminal managing slave terminals and forming a network together with the slave terminals, includes unit receiving, from a slave terminal, one of a secession request packet and a join request packet, first storage unit storing first identifiers of the slave terminals, second storage unit storing second identifiers to be assigned to the slave terminals and reception channels for the slave terminals, unit determining whether the reception channels assigned to the slave terminals are unevenly distributed after the slave terminal secedes from or joins the network, unit reassigning, when the determination unit determines that the reception channels are unevenly distributed, at least one of the first identifiers to at least one of the slave terminals not to unevenly distribute the reception channels and update the first storage unit, and unit transmitting the at least one of the first identifiers to the at least one of the slave terminals. | 03-12-2009 |
20090067356 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes: a packet detection part detecting presence/absence of a reception of a packet; a judgment part judging whether or not temporal change of presence/absence of the reception of the packet detected in the packet detection part corresponds to a predetermined identifier; and a power source control unit controlling power supply from a power source based on a result of a judgment in the judgment part. | 03-12-2009 |
20090132836 | POWER-SAVING CONTROL APPARATUS AND METHOD - A power-saving control apparatus includes a memory storing first to Nth different authentication codes, determines, every time a signal including an authentication code is received, whether the authentication code in the received signal is a valid code which matches one of the authentication codes in the memory, outputs an operation signal to a main apparatus when the authentication code in the received signal is determined to be the valid code, and generates a new authentication code, when (a) the number of times the authentication code in each received signal matches a first authentication code of the authentication codes in the memory is equal to a predetermined value or (b) the authentication code in the received signal matches a second or subsequent authentication code of the authentication codes in the memory, to delete one of the authentication codes in the memory, and to store the new authentication code in the memory. | 05-21-2009 |
20090199292 | CONTROL DEVICE, CONTROLLED DEVICE, AND CONTROL METHOD - A control device communicating with a controlled device to control the controlled device includes a first memory to store first authentication information for activation of the controlled device, a second memory to store a key for encryption, a generator to generate third authentication information by encrypting second authentication information transmitted by the controlled device in response to the first authentication information using the key stored in the second memory, a transmitter to transmit the first authentication information or the third authentication information to the controlled device, and a memory controller to store the second authentication information or the third authentication information as first authentication information for next authentication in the first memory. | 08-06-2009 |
20100039159 | CONTROL DEVICE AND CONTROL METHOD - This control device includes: a rectifier to rectify a received signal; an amplifier having an amplifying element to amplify the signal rectified by the rectifier and an assisting element being connected to the amplifying element to assist the amplifying element; a determination unit to determine presence or absence of the signal amplified by the amplifier; and a controller to control the connection of the assisting element with the amplifying element at a predetermined timing. | 02-18-2010 |
20100215116 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus for performing communication using a first communication scheme which transmits a signal using amplitude shift keying and a second communication scheme which suppresses communication with others except a communication counterpart by transmitting a transmission suppression signal before communication is started. The apparatus includes: a first signal generation unit configured to generate transmission data; a modulation unit configured to generate first and second signals having different amplitudes by amplitude-shift keying the transmission data; a second signal generation unit configured to generate the transmission suppression signal having a signal length corresponding to that of the first signal; and a transmission unit configured to transmit the transmission suppression signal at the timing when the first signal is transmitted. | 08-26-2010 |
20100231431 | ELECTRONIC SYSTEM - An electronic system includes: an AC-DC converter to convert an AC voltage into a DC voltage and to supply the DC voltage to a secondary battery; a first detector to detect a remaining amount of the secondary battery; a transmitter to transmit a signal corresponding to the remaining amount of the secondary battery; a receiver to receive the signal transmitted by the transmitter; and a controller to control the AC-DC converter using the signal received by the receiver. | 09-16-2010 |
20120231756 | RECEIVING APPARATUS - A receiving apparatus includes a variable gain unit to change between a first gain and a smaller second gain, and to amplify a received signal to obtain an amplified signal; a comparator to compare a power of the amplified signal with a reference value; and a controller to set a gain to the first gain while in a standby state, to reset a gain to a third gain between the first and second gains if in a standby state the power of the received signal is larger than the reference value, and then to set a gain to the first gain and return to the standby state if the power is equal to or lower than the reference value, or if not, to a fourth gain between the first and third gains. | 09-13-2012 |
20140071807 | WIRELESS COMMUNICATION APPARATUS - According to one embodiment, a wireless communication apparatus includes a management unit and a setting unit. The setting unit sets, upon determination of disconnection of a wireless link with a base station of a main network used for communication, duration for waiting for receiving a first signal related to formation of a new network based on a priority. The management unit, when the duration is set, waits for receiving the first signal until the duration elapses. The setting unit switches an operation mode to a base station mode if the first signal is not received even the duration elapses. The management unit repeatedly performs a process to transmit the first signal after the operation mode is switched to the base station mode. | 03-13-2014 |
20140119080 | INVERTER APPARATUS AND INVERTER SYSTEM - According to one embodiment, an inverter apparatus includes a power conversion unit, a wireless communication unit and a control unit. The power conversion unit converts input power that is one of DC power and AC power into AC output power. The wireless communication unit wirelessly receives a first synchronization signal. The control unit controls a phase of the output power based on the first synchronization signal. | 05-01-2014 |
20140241270 | WIRELESS COMMUNICATION APPARATUS AND LOGGING SYSTEM - According to an embodiment, a wireless communication apparatus includes a packet generator, a queue unit, a predictor and a scheduler. The packet generator packetizes data. The queue unit temporarily stores a packet to be transmitted. The predictor predicts a transmission time of a first packet to obtain a first time. The scheduler outputs a second packet to the queue unit at a second time earlier than the first time. An interval from a third time when transmission of the second packet is complete until the first time is equal to or shorter than a predetermined period. | 08-28-2014 |