Patent application number | Description | Published |
20080305817 | RADIO COMMUNICATION SYSTEM CAPABLE OF MAINTAINING COMMUNICATION PERFORMED BETWEEN MASTER STATION AND SLAVE STATION BELONGING TO SUCH MASTER STATION EVEN WHEN INTERFERENCE SIGNAL IS DETECTED - A radio communication system includes one master station which performs transmission without being controlled by another radio station and which is configured to independently set a channel for use in a radio communication, and at least one slave station which belongs to the one master station and whose radio communication channel used and transmission/reception operations are controlled by the master station. When detecting an interference signal which disturbs the radio communication during operation, the one master station or the at least one slave station sets a first modulation scheme applied to the radio communication to the same second modulation scheme as a modulation scheme used in broadcast in order to convey information necessary for an evasive action to move to another radio communication channel. | 12-11-2008 |
20090092110 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD USING VARIABLE TRANSMISSION RATE - A wireless communication apparatus includes a transmission section and a control section. The transmission section transmits data using wireless communication. The control section controls a transmission rate for the transmission section. The control section limits data size of data to be transmitted to at most a prescribed value and requests a transmission acknowledgement, during a period from immediately after a change in the transmission rate until number of times that the transmission section transmits data reaches a prescribed number of times. | 04-09-2009 |
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 |
20090116416 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus includes a received frame analysis unit, a received frame bitmap information storage unit, a bitmap reset determination unit, a Block Ack frame generation unit, and a TID bitmap storage unit. The received frame analysis unit analyzes a received MAC frame. The received frame bitmap information storage unit stores delivery acknowledgement of the received MAC frame. The bitmap reset determination unit determines whether or not information stored in the received frame bitmap information storage unit should be reset or not. The Block Ack frame generation unit generates a Block Ack frame including a bitmap to be stored in the received frame bitmap information storage unit on the basis of the delivery acknowledgement request analyzed by the received frame analysis unit. The TID bitmap storage unit stores an identifier of a frame allowing the received frame bitmap information storage unit to store the delivery acknowledgement. | 05-07-2009 |
20090232053 | WIRELESS COMMUNICATION APPARATUS HAVING ACKNOWLEDGEMENT FUNCTION AND WIRELESS COMMUNICATION METHOD - A wireless communication apparatus includes a reception unit, an information management unit, and a transmission unit. The reception unit receives data including a plurality of data frames. The data frames are transmitted from an identical data source and managed by an identical traffic identifier. The information management unit retains acknowledgement information to perform an acknowledgement. The information management unit discards an already-retaining acknowledgement information when the data is newly received. The transmission unit performs the acknowledgement to the data source of the data using the acknowledgement information. The transmission unit performs the acknowledgement to the data corresponding to the acknowledgement information irrespective of a request of the acknowledgement from the data source when the information management unit discards the acknowledgement information or when a prediction on the discard of the acknowledgement information is made. | 09-17-2009 |
20090245125 | WIRELESS COMMUNICATION SYSTEM FOR REDUCING POWER CONSUMPTION WHEN RECEIVING A FRAME HAVING A LOW RECEPTION SUCCESS POSSIBILITY - A header analysis unit reads a parameter showing a format of a digital signal contained in a received signal. A received signal quality measurement unit measures a quality of the received signal. An awake/sleep control unit controls restart and sleep of a reception unit based on data from the header analysis unit and the received signal quality measurement unit. The awake/sleep control unit stops a reception operation for a period corresponding to a frame length when the quality of the leading portion of the received signal is less than a predetermined threshold. | 10-01-2009 |
20100020711 | COMMUNICATION DEVICE COMPRISING A CARRIER SENSE FUNCTION AND COMMUNICATION METHOD - A communication device of an example of the present invention comprises a first unit determining that whether a state is a first state indicating that a transmission medium is in use, a second state indicating that the transmission medium is not in use, or a third state indicating that whether or not the transmission medium is in use is being determined, and a second unit prohibiting a data transmission in the first and third states, and permitting the data transmission in the second state. | 01-28-2010 |
20100034182 | WIRELESS COMMUNICATION APPARATUS AND METHOD - When a wireless communication apparatus transmits a data frame requesting an ACK frame, it is expected that a receiver station will transmit the ACK frame. A preamble analyzer analyzes whether or not a preamble pattern added to the header of a received frame exists from the time it is expected that the ACK frame will be received. When a desired preamble pattern is detected, the preamble analyzer supplies instructions to start an operation of demodulating a reception signal to a demodulator via a controller. | 02-11-2010 |
20100085950 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD - A wireless communication device includes a physical layer protocol processor which can transmit and receive data by first to Nth communication schemes, where ith communication scheme has compatibility with the first to (i−1)th communication scheme. A first controller generates a first frame for forbidding communication by the first to Nth communication schemes for a first period, and orders the physical layer protocol processor to transmit the first frame by the first communication scheme. A second controller generates a second frame for lifting the forbiddance on communication, and orders the physical layer protocol processor to transmit the second frame by a jth communication scheme. A third controller generates a third frame for forbidding communication by a (j+1)th to Nth communication schemes for a second period, and orders the physical layer protocol processor to transmit the third frame by the (j+1)th communication scheme. | 04-08-2010 |
20100329231 | WIRELESS COMMUNICATION APPARATUS WITH PHYSICAL LAYER PROCESSING MODULE AND MAC LAYER PROCESSING MODULE AND ITS COMMUNICATION METHOD - A wireless communication apparatus includes a first module, a second module, an inhibit module, a calculation module, and a control module. The first module constitutes a first system. The first system transmits and receives first data to and from a first device. The second module constitutes a second system. The second system transmits and receives second data to and from a second device in each interval time-divided with determined transmission timing. The inhibit module generates inhibit periods for preventing the first module from communicating by use of the first data. The calculation module calculates an occupation time required for the transmission and reception of the first data. The control module compares the period between the inhibit periods adjacent to one another with the occupation time and, according to the comparison result, instructs the first device to stop or delay the transmission of the first data. | 12-30-2010 |
20110222487 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - According to one embodiment, a wireless communication apparatus includes a reception unit, a storage unit, a transfer amount decision unit, and a first transfer control unit. The reception unit receives a first frame with a frame length of a first length using a first wireless method. The storage unit stores the first frame. The transfer amount decision unit sets, when a second length decided based on the first wireless method is smaller than the first length, a third length to be the second length, and sets, when the second length is not less than the first length, the third length to be a value not more than the first length. The first transfer control unit transfers transfer information including first information of the third length in the first frame to a first memory, and transfers the first frame by the first length to a second memory. | 09-15-2011 |
20110267958 | WIRELESS COMMUNICATION DEVICE AND SIGNAL DETECTION CIRCUIT - A wireless communication device that includes a wireless communication unit that performs a wireless communication in a first mode using a first frequency band serving as a first communication channel, and performs the wireless communication in a second mode using a second frequency band including the first communication channel and a second communication channel that is adjacent to the first communication channel. Also included is a detection unit that monitors each of the first frequency band and the second frequency band, outputs a first detection signal when an interference signal is detected in the first frequency band and outputs a second detection signal when the interference signal is detected in the second frequency band. Further included is a determination unit that determines whether the interference signal is in the first communication channel or in the second communication channel based on the first and second detection signals. | 11-03-2011 |
20120069828 | WIRELESS COMMUNICATION DEVICE AND COMMUNICATION METHOD THEREOF - According to one embodiment, a wireless communication device includes a first transmitting/receiving unit, a first physical processor, and a first MAC processor. The first transmitting/receiving unit transmits one first wireless signal and receives a second wireless signal by a first wireless communication method using a frequency band with a certain bandwidth. The first physical processor decodes the second wireless signal to obtain a frame and encodes a frame of the first wireless signal to be transmitted. The first MAC processor supplies a control frame generated by embedding a first frame to a MAC header of a second frame to the physical processor as the frame. The first frame is recognizable by the first wireless communication method and a second wireless communication method. The second frame is recognizable by the first wireless communication method but is not recognizable by the second wireless communication method. | 03-22-2012 |
20120082056 | COMMUNICATION DEVICE COMPRISING A CARRIER SENSE FUNCTION AND COMMUNICATION METHOD - A communication device of an example of the present invention comprises a first unit determining that whether a state is a first state indicating that a transmission medium is in use, a second state indicating that the transmission medium is not in use, or a third state indicating that whether or not the transmission medium is in use is being determined, and a second unit prohibiting a data transmission in the first and third states, and permitting the data transmission in the second state. | 04-05-2012 |
20120244806 | MEMORY DEVICE AND METHOD OF CONTROLLING THE SAME - According to one embodiment, a memory device includes a first interface, a wireless communication unit, and first and second memories. The wireless communication unit is capable of wireless communication. The first memory is nonvolatile and capable of storing data. The second memory is capable of temporarily holding data received by the wireless communication unit. The wireless communication unit sets, by transmitting a first frame, a period during which data is not transmitted to the wireless communication unit when remaining capacity of the second memory has become smaller than first capacity. | 09-27-2012 |
20130094492 | WIRELESS COMMUNICATION APPARATUS WITH PHYSICAL LAYER PROCESSING MODULE AND MAC LAYER PROCESSING MODULE AND ITS COMMUNICATION METHOD - A wireless communication apparatus includes a first module, a second module, an inhibit module, a calculation module, and a control module. The first module constitutes a first system. The first system transmits and receives first data to and from a first device. The second module constitutes a second system. The second system transmits and receives second data to and from a second device in each interval time-divided with determined transmission timing. The inhibit module generates inhibit periods for preventing the first module from communicating by use of the first data. The calculation module calculates an occupation time required for the transmission and reception of the first data. The control module compares the period between the inhibit periods adjacent to one another with the occupation time and, according to the comparison result, instructs the first device to stop or delay the transmission of the first data. | 04-18-2013 |
20130179628 | SEMICONDUCTOR MEMORY DEVICE - According to one embodiment, a semiconductor memory device includes a memory and a controller. The controller controls the memory, communicates with a host device via a first signal line and a second signal line, and receives data items to be written in the memory from the host device on the first and second signal lines in a first period. The same group number is assigned to two data items which flow in parallel on the first and second signal lines. The controller transmits to the host device a response packet including an indication of a group number assigned to an unsuccessfully received one of the data items. | 07-11-2013 |
20140274174 | APPARATUS AND METHOD FOR WIRELESS COMMUNICATION, HAVING FUNCTIONS OF DIFFERENT COMMUNICATION SYSTEMS - According to one embodiment, a wireless communication apparatus includes a first wireless communication unit, a second wireless communication unit, a reception power management unit, a frequency selection unit, and a frequency-hopping management unit. The second wireless communication unit performs wireless communication by means of a second wireless communication system different from the first communication system. The reception power management unit measures reception power. The frequency selection unit selects frequency-channel data enabling the second wireless communication unit to perform communication, on the basis of the reception power measured by the reception power management unit. The frequency-hopping management unit determines a frequency channel from the frequency-channel data selected by the frequency selection unit, if the second wireless communication unit performs communication by using a frequency hopping system. | 09-18-2014 |