Patent application number | Description | Published |
20090116400 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD ENABLING SWITCHING OF COMMUNICATION CHANNEL - A wireless communication apparatus includes a transmission and reception unit, a monitoring unit, and a control unit. The transmission and reception unit transmits and receives a frame to and from a wireless communication terminal. The monitoring unit monitors an interference signal in a first communication channel. The control unit selects a second communication channel and a third communication channel. The second and the third communication channels are different from the first communication channel. The transmission and reception unit transmits an instruction frame to the wireless communication terminal when the monitoring unit detects the interference signal in the first communication channel. The instruction frame includes information on the second and third communication channels and instructs the wireless communication terminal to switch the communication channel from the first communication channel to at least one of the second and third communication channels. | 05-07-2009 |
20090196364 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND PROGRAM - A radio communication method stores a plurality MAC frames for each of a plurality of destinations. The method decides the longest transmission time of transmission times needed to transmit the plurality of MAC frames to each of the plurality of destinations within a fixed period. The method generates a plurality of physical frames for the plurality of destinations to transmit them at the same time by connecting the plurality of MAC frames and adding additional information to each connected MAC frame so as to be a frame length equivalent to a transmission time equal to the longest transmission time. | 08-06-2009 |
20090305734 | RADIO COMMUNICATION APPARATUS, METHOD AND PROGRAM - An apparatus includes a unit receiving a first-radio signal indicating a state in which transmission by a SDMA scheme is allowed, a unit determining whether a transmission state is a first state (the SDMA scheme is available), or a second state (the SDMA scheme is unavailable), a unit transmitting a radio signal using the SDMA scheme, when it is determined that the first state continues for the first-time period, and a unit setting a third-time period, when the first state fails to continue for the first-time period, the third-time period being obtained by subtracting, from the first-time period, a second-time period ranging from when carrier sense is started to when the transmission state is determined to be the second state, wherein when the first-radio signal is received after the third-time period is set, it is determined whether the first state continues for the third-time period. | 12-10-2009 |
20090323608 | APPARATUS AND METHOD FOR WIRELESS COMMUNICATION - A wireless communication apparatus which can simultaneously conduct communication on at least two frequency channels is described. The apparatus includes a communication unit which refers to a connection management table to determine a communication system which can be used by a wireless communication terminal using an identifier of the wireless communication terminal, and conducts communication with the wireless communication terminal on a second frequency channel using the communication system, when a request from the wireless communication terminal to change the first frequency channel to the second frequency channel is permitted. | 12-31-2009 |
20110044302 | RADIO COMMUNICATION APPARATUS, COMPUTER READABLE STORAGE MEDIUM, AND RADIO COMMUNICATION SYSTEM - In a radio communication system that simultaneously uses plural radio channels (STA | 02-24-2011 |
20110122853 | RADIO COMMUNICATION DEVICE, CONTROL METHOD FOR RADIO COMMUNICATION DEVICE AND PROGRAM STORAGE MEDIUM - A radio communication device C | 05-26-2011 |
20120014335 | WIRELESS TERMINAL - There is provided a wireless terminal including: a frame allocating unit performing an allocation process on a frame to be transmitted to another wireless terminal; a first communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a first channel or a first mode; a second communication unit assigning a sequence number to the allocated frame and transmitting the frame to the another wireless terminal through a second channel or a second mode, wherein the allocating unit allocates the frame to one of the first and second communication units; when changing the transmission source of the frame from the one to the other communication unit, a change notification frame including a transmission starting sequence number is transmitted to the another wireless terminal; and the frame allocating unit switches the allocation destination of the frame from the one to the other. | 01-19-2012 |
20120088460 | COMMUNICATION DEVICE - According to one embodiment, a communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period. | 04-12-2012 |
20120200397 | COMMUNICATION DEVICE - A communication device includes a first receiver, a second receiver, a communication module, and a controller. The first receiver receives an operation signal from a remote controller. The second receiver receives a radio signal with a specific frequency. A power consumption of the second receiver is less than that of the first receiver. The communication module is capable of transmitting the operation signal to a first communication device. The controller controls power supply to the first receiver and the communication module and starts power supply to the first receiver and the communication module if the second receiver receives the radio signal. The communication module turns to a standby state if the first receiver does not receive the operation signal after start of power supply to the first receiver. | 08-09-2012 |
20120315962 | COMMUNICATION DEVICE - A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period. | 12-13-2012 |
20130003661 | RADIO SYSTEM, RADIO BASE STATION AND RADIO TERMINAL - One of a plurality of radio terminals that transmit radio signals to a radio base station under a space multiplexing scheme, including a receiving unit | 01-03-2013 |
20130083762 | APPARATUS AND METHOD FOR WIRELESS COMMUNICATION - A wireless communication apparatus which can simultaneously conduct communication on at least two frequency channels is described. The apparatus includes a communication unit which refers to a connection management table to determine a communication system which can be used by a wireless communication terminal using an identifier of the wireless communication terminal, and conducts communication with the wireless communication terminal on a second frequency channel using the communication system, when a request from the wireless communication terminal to change the first frequency channel to the second frequency channel is permitted. | 04-04-2013 |
20130294373 | RADIO SYSTEM, RADIO BASE STATION AND RADIO TERMINAL - One of a plurality of radio terminals that transmit radio signals to a radio base station under a space multiplexing scheme, including a receiving unit that receives an access right request signal with respect to the radio base station from an other radio terminal, a prevention unit that prevents transmission of radio signals when receiving radio signals directed to an other radio terminal, a cancellation unit that cancels the prevention of transmission when receiving an access right assignment signal during the prevention of transmission and a transmitting unit that transmits a data signal to the radio base station according to the assignment signal, wherein radio signals are transmitted to the radio base station simultaneously with the other radio terminals and under the space multiplexing scheme. | 11-07-2013 |
20130343254 | COMMUNICATION DEVICE - A communication device includes a receiver, a transmitter and an interruption module. The receiver receives an allocation signal indicating a first period usable by the communication device and a second period usable by a plurality of communication devices including the communication device. The transmitter transmits a transmission signal in the first period. If the transmission of the transmission signal is completed within the first period, the interruption module interrupts at least a part of power supply to the receiver in the second period. If the transmission of the transmission signal is not completed within the first period and directivity of radio waves used by a second communication device includes a direction of the communication device in a communication period allocated before the second period, the transmitter transmits the transmission signal in the second period. | 12-26-2013 |
Patent application number | Description | Published |
20090133127 | DATA COMMUNICATION APPARATUS, METHOD OF CONTROLLING THE SAME, PROGRAM, AND STORAGE MEDIUM - A data communication apparatus that permits the use of a communication function in an appropriate manner even before a license for the communication function is made valid. A CPU of a printing apparatus as the data communication apparatus determines whether or not a trial transmission license is valid. If it is determined that the license is not valid, the CPU performs inhibits execution of processing associated with the transmission function, and restricts processing to be performed on data received using the reception function without inhibiting execution of processing associated with the reception function. | 05-21-2009 |
20100195145 | IMAGE PROCESSING APPARATUS, CONTROL METHOD FOR IMAGE PROCESSING APPARATUS, AND STORAGE MEDIUM STORING CONTROL PROGRAM THEREFOR - An image processing apparatus that is capable of reducing a burden on a user when performing an input operation of a unique setting value to an image processing apparatus that is newly added to a system. An acquisition unit acquires a unique setting value from at least one selected from the other image processing apparatuses via the network, the unique setting value being unique to the selected image processing apparatus among setting values set to the selected image processing apparatus concerned. A display unit displays a setting screen that includes a reference area for displaying the unique setting value acquired by the acquisition unit as a reference value, and an input area for inputting the unique setting value that is set up to the image processing apparatus itself. | 08-05-2010 |
20120195296 | WIRELESS COMMUNICATION APPARATUS - According to embodiments, a wireless communication apparatus supports at least a second wireless communication scheme between a first, wireless communication scheme and the second wireless communication scheme. The first wireless communication scheme requires that a wireless medium is determined to be busy when a reception level is equal to or greater than a minimum reception sensitivity level of physical scheme. The apparatus includes a first processing unit and a second processing unit. The first processing unit is configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme and set a value greater than the minimum reception sensitivity level, of the physical scheme, for a carrier sense level, when the second wireless communication scheme is used. The second processing unit is configured to carry out carrier sense using the carrier sense level. | 08-02-2012 |
20120201177 | WIRELESS COMMUNICATION TERMINAL - According to one embodiment, a wireless communication terminal including a receiver, a first processor, a first storage, a second storage, a second processor, and a transmitter is provided. The receiver receives one physical packet that includes at least one frame body field, a first field including information on a length of the frame body field, a second field used to detect an error of the frame body field, and a sequence number field including a sequence number corresponding to the frame body field. The second storage retains a successively and successfully received maximum sequence number on the basis of a result of the first processor. The transmitter transmits a response frame indicating the successively and successfully received maximum sequence number when the first processor extracts at least one correct frame body. | 08-09-2012 |
20120218938 | WIRELESS COMMUNICATION APPARATUS AND METHOD - According to one embodiment, a wireless communication apparatus includes a receiving unit, a transmitting unit and a control unit. The receiving unit is configured to receive a first connection request frame indicating a connection request from another apparatus. The transmitting unit is configured to transmit a connection acceptance frame indicating a response to the first connection request frame. The control unit is configured to control the transmitting unit to retransmit the connection acceptance frame until a first acknowledgement frame addressed to the apparatus as a response to the connection acceptance frame is received from the another apparatus, and control the transmitting unit to stop from transmitting the connection acceptance frame if a second acknowledgement frame addressed to the another apparatus as a destination is received or if a second connection request frame addressed to the another apparatus is received. | 08-30-2012 |
20120220228 | WIRELESS COMMUNICATION APPARATUS - According to one embodiment, there is provided a wireless communication apparatus for making wireless connection in the first connection attempt state wherein a connection request is attempted using a predetermined frequency channel or the second connection attempt state wherein a connection request is attempted using a plurality of frequency channels. A frame generation unit generates a connection request frame which includes the first field for requesting a search of the plurality of frequency channels in response to occurrence of interference, and the second field indicating whether a corresponding frequency channel is a channel wherein occurrence of interference has been detected. A transmission unit transmits the connection request frame using the predetermined frequency channel in the first connection attempt state, and transmits the connection request frame using the plurality of frequency channels in the second connection attempt state. | 08-30-2012 |
20130155955 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - There is provided a wireless communication apparatus performing access control which starts transmission after a backoff time passes since an available state of a channel is detected through carrier sense, the backoff time being set based on a random value selected within a contention window width, including: a remaining time calculating unit calculating a remaining time untill a request delay time time-outs after data is generated and a setting unit setting the contention window width according to the remaining time calculated by the remaining time calculating unit. | 06-20-2013 |
20130223250 | WIRELESS COMMUNICATION APPARATUS AND INTERFERENCE DETECTION METHOD - According to one embodiment, a wireless communication apparatus is provided with first and second determination units. The first unit determines based on a first carrier sense threshold whether busy state or not and specifies a first time when busy state is determined with the first threshold, and determines based on a second carrier sense threshold smaller than the first threshold whether busy state or not and specifies a second time when busy state is determined. The second unit determines, if at least busy state is determined based on the second threshold and the second time precedes a reference time equal to or earlier than the first time, to perform processing for avoiding interference. | 08-29-2013 |
20130230040 | WIRELESS COMMUNICATION APPARATUS AND METHOD - According to one embodiment, a wireless communication apparatus includes a first processor, a second processor and a controller. The first processor generates one or more first frames and one or more second frames. The second processor transmits the first frames and the second frames, and receives a first acknowledgement and a second acknowledgement. The controller retains a first interval relating to a time interval between the first transmission request and the second transmission request and a second interval relating to a time interval between a first and a second time points, and controls transmission of frames to be transmitted based on the first and the second intervals. | 09-05-2013 |
20140062657 | WIRELESS COMMUNICATION APPARATUS, AUTHENTICATION APPARATUS, WIRELESS COMMUNICATION METHOD AND AUTHENTICATION METHOD - According to one embodiment, when a control unit is notified of information in at least one second signal received by one of first and second wireless communication units after the control unit provides the second wireless communication unit with a command to transmit a first signal containing first address information and before a waiting time elapses and when the at least one second signal contains second address information assigned to an authentication apparatus having received the first signal, then the control unit provides the first wireless communication unit with a command to transmit a third signal for a connection request with the second address information set in a destination address. | 03-06-2014 |
20140089513 | WIRELESS COMMUNICATION APPARATUS AND METHOD - According to one embodiment, a wireless communication apparatus includes a first and a second processing unit. The first processing unit generates a control signal related to connection settings. The second processing unit supports wireless systems and is configured to transmit a first frame including first information related to at least one of the plurality of wireless systems by any of the wireless systems, grasp, based on a second frame received from another wireless communication apparatus, a wireless system supported by the other wireless communication apparatus, select a wireless system used for data exchange with the other wireless communication apparatus based on the second information indicating the grasped wireless system. | 03-27-2014 |
20140161040 | WIRELESS COMMUNICATION TERMINAL - According to one embodiment, a wireless communication terminal including a receiver, a first processor, a first storage, a second storage, a second processor, and a transmitter is provided. The receiver receives one physical packet that includes at least one frame body field, a first field including information on a length of the frame body field, a second field used to detect an error of the frame body field, and a sequence number field including a sequence number corresponding to the frame body field. The second storage retains a successively and successfully received maximum sequence number on the basis of a result of the first processor. The transmitter transmits a response frame indicating the successively and successfully received maximum sequence number when the first processor extracts at least one correct frame body. | 06-12-2014 |
20140185547 | WIRELESS COMMUNICATION APPARATUS AND METHOD - In general, according to one embodiment, there is provided a wireless communication apparatus used for asymmetrical communication, in which frame transmission at a first interval and frame transmission at a second interval longer than the first interval are performed. The apparatus includes a receiver, an interval controller, and a transmitter. The receiver receives a frame for which a flag requesting transmission of an acknowledgement is set. The interval controller changes the first interval to a third interval longer than the second interval in response to reception of the frame. The transmitter performs frame transmission at the third interval. | 07-03-2014 |
20140376027 | IMAGE FORMING APPARATUS CAPABLE OF MAKING USER AWARE OF SECURITY POLICY VIOLATION, METHOD OF CONTROLLING THE IMAGE FORMING APPARATUS, AND STORAGE MEDIUM - An image forming apparatus which is capable of making a user aware of a violation of an information security policy. A network communication unit receives data having a user ID attached thereto from an external apparatus. A printing unit prints an image based on the data. A control unit executes user authentication using the user ID attached to the data and determines, when the user authentication is successful, whether or not a password expiration date of the user has passed. When it is determined that the password expiration date has passed, the control unit restricts printing of the image to be printed based on the data having the user ID attached thereto. | 12-25-2014 |
20150063341 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus supports at least a second wireless communication scheme between a first wireless communication scheme and the second wireless communication scheme. The first wireless communication scheme requires that a wireless medium is determined to be busy when a reception level is equal to or greater than a minimum reception sensitivity level of a physical scheme. The apparatus includes a first processing unit and a second processing unit. The first processing unit is configured to set a value lower than a maximum transmission power of the first wireless communication scheme, for a maximum transmission power of the second wireless communication scheme and set a value greater than the minimum reception sensitivity level of the physical scheme, for a carrier sense level, when the second wireless communication scheme is used. The second processing unit is configured to carry out carrier sense using the carrier sense level. | 03-05-2015 |
20150154014 | IMAGE FORMING APPARATUS, CONTROL METHOD THEREFOR, AND CONTROL PROGRAM THEREFOR - An image forming apparatus capable of updating firmware appropriately. An update means obtains update firmware for updating the applied firmware, expands the update firmware, and applies the expanded update firmware to the image forming apparatus. A first determination means determines whether the update firmware is secure firmware. The update means performs the obtaining, the expansion, and the application sequentially, when the first determination means determines that the update firmware is secure firmware. | 06-04-2015 |