Abstract: According to one embodiment, a communication apparatus includes an operation mode storage unit that stores a mode in which the communication apparatus operates as a wireless base station or a terminal and a non-volatile memory, wherein a transmission message is output to the outside when the communication apparatus operates as the wireless base station, data included in a received reception message is stored in the non-volatile memory when the communication apparatus operates as the terminal, and when the communication apparatus operates as the wireless base station, after all data transmitted from a first external wireless base station is received, if a communication quality with the first wireless base station is less than a predetermined value, and no message is received from a wireless base station other than the first wireless base station, a channel selection and switching process is performed, and then the operation mode is changed from the terminal to the wireless base station.

Abstract: According to an embodiment, a wireless communication device performs time-division communication and includes a storage and one or more processors. The storage is configured to store transmission data to be sent in a first period of time. The one or more processors are configured to perform a transmission process of sending the transmission data in a first frame at start of a plurality of frames included in the first period of time, or perform a transmission process of sending a pieces of divided the transmission data in a plurality of successive frames beginning from the first frame and included in the first period of time. After the transmission process, the wireless communication device switches to sleep mode in one or more frames of the first period of time.

Abstract: A wireless communication system includes a concentrator and a plurality of wireless communication apparatuses including a first wireless communication apparatus having a first number of hops up to the concentrator, a second wireless communication apparatus having a second number of hops different from the first number of hops up to the concentrator, and a third wireless communication apparatus having a third number of hops different from the first number of hops and the second number of hops up to the concentrator. In a first subframe among a plurality of subframes included in a first frame period, the first wireless communication apparatus transmits first data, the second wireless communication apparatus transmits second data, and the third wireless communication apparatus receives the second data.

Abstract: A wireless communication apparatus according to an embodiment includes a transceiver and a transmission slot determiner. The transceiver transmits/receives information. The transmission slot determiner determines a transmission slot in which the transceiver transmits information, from a frame time-divided into a plurality of slots, based on the rank value of self node corresponding to the number of hops to a root node. A plurality of slot groups including a plurality of continuous slots is set in the frame. The slot groups are assigned different rank values. The transmission slot determiner selects a slot group to which the rank value of self node is assigned, and determines a transmission slot from among the slots included in the selected slot group.

Abstract: A wireless communication device according to an embodiment includes a transceiver and a timer. The transceiver transmits and receives data and transmits the data in a first direction and a second direction. The timer determines a timing for the transceiver to transmit data such that a transmission interval in the first direction is longer than a transmission interval in the second direction.

Abstract: According to one embodiment of the present invention, there is provided a communication device includes: processing circuitry configured to generate first bitmap data indicating a calculated value of a function based on identifiers of other first communication devices; and a communicator configured to transmit a first message including the first bitmap data.

Abstract: A wireless communication device for wireless relay communication includes a network interface, a data storage, and a processor. The processor determines whether or not to continue communication with a current parent node based on a communication status with the current parent node. Upon determining not to continue communication with the current parent node, the processor determines part of the nodes in the network to be one or more candidates for a new parent node, based on hop numbers of the nodes stored in the data storage, each of which is associated with one of the nodes in the network, wherein a hop number of a node indicates a node distance between the node and a reference node, causes the network interface to be in a receivable state during time slots associated with the one or more candidates, and selects one of the candidates as the new parent node.

Abstract: An imaging apparatus include an imaging processing unit, a dial operation unit, a boundary setting unit, and a control unit. The imaging processing unit acquires image data having a predetermined image effect. The dial operation unit receives a dial operation to set at least one boundary line in the image data. The boundary setting unit sets the boundary line in the image data in response to the dial operation. The control unit controls the imaging processing unit so that image data having different image effects are obtained in the respective partial regions of the image data that are divided by the boundary line set by the boundary setting unit.

Abstract: A wireless communication device as an embodiment of the present invention configures a wireless mesh network with a plurality of other wireless communication devices and includes data storage and circuitry coupled with the data storage. The data storage is configured to store data including a first data. The circuitry is configured to receive first reception data transmitted from one of the plurality of other wireless communication devices and to determine whether the first data matches with at least a part of the first reception data and to process to transmit at least a part of data stored in the data storage. The circuitry is configured not to process to transmit the first data determined to match at least the part of the first reception data.

Abstract: A wireless communication device for wireless relay communication includes a network interface, a data storage, and a processor. The processor determines whether or not to continue communication with a current parent node based on a communication status with the current parent node. Upon determining not to continue communication with the current parent node, the processor determines part of the nodes in the network to be one or more candidates for a new parent node, based on hop numbers of the nodes stored in the data storage, each of which is associated with one of the nodes in the network, wherein a hop number of a node indicates a node distance between the node and a reference node, causes the network interface to be in a receivable state during time slots associated with the one or more candidates, and selects one of the candidates as the new parent node.

Abstract: A wireless communication device according to an embodiment has an interface and a sleep controller. The interface transmits and receives a wireless signal. The sleep controller sets a sleep period equal to or shorter than a predetermined interrupt period when a first period from a current time to a start timing of a next one of the task is longer than the interrupt period.

Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

Abstract: According to an embodiment, a communication control device includes an acquisition unit, first and second authentication units, an output unit, and a connection permission unit. The acquisition unit acquires first authentication information for authenticating a communication device during initialization, via a first communication unit, from a terminal device that acquires and decodes encoded first authentication information. During initialization, the first authentication unit executes a connection authentication of the communication device via a second communication unit, based on the first authentication information. When the authentication is successful, the output unit encrypts second authentication information different from the first authentication information, and output the encrypted second authentication information to the communication device.

Abstract: A wireless communication device according to an embodiment is one of a plurality of wireless communication devices in a multihop wireless communication system to transmit and receive information with each other. The wireless communication device has: a transmitter configured to transmit information in an m-th slot (m is an integer equal to or more than 1 and equal to or less than M, M is an integer equal to or more than 2) in a first slot group in N slot groups (N is an integer equal to or more than 2) in a frame, respective one of the slot groups including M slots, and a controller configured to control the transmitter to receive a connection request in an m-th slot in a second slot group in the N slot groups from a wireless communication device not included in the plurality of wireless communication devices.

Abstract: A wireless communication device according to one of the embodiments has: a transmitter configured to transmit information; and a controller configured to control the transmitter. The controller calculates a communication amount for additional communication with another device on the basis of power information indicating a power state of a power supply; and determines whether the wireless communication device connect to the another device at least in part based on the calculated communication amount.

Abstract: There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

Abstract: According to one embodiment, a communication apparatus includes a radio interface unit that sends a data message to a receiver and extracts, when a message sent by the receiver via unicast with an optimized transmission rate is received, rate information indicating the optimized transmission rate of the receiver from the received message, a message processor that generates the data message, in which a multicast identifier indicating a multicast group is a destination, and outputs the data message to the radio interface unit, and a selector that selects, according to the rate information, a data message transmission rate to send the data message.

Abstract: According to an embodiment, a communication device includes a determiner, an extractor, and an identifier. The determiner is configured to determine whether received data is addressed to the communication device. The extractor configured to extract data satisfying a determination criterion for setting data as relay data, from received data determined not to be addressed to the communication device. The identifier is configured to identify, as relay data, received data determined to be addressed to the communication device and the extracted data.

Abstract: According to one embodiment, a wireless communication device includes: a receiver, processing circuitry and a transmitter. The receiver receives a first frame having first to M-th destination ID fields related to first to M-th data selection conditions and a data field, the data field including first to N-th data related to first to N-th wireless communication devices wherein M is an integer equal to or greater than 2 and N is an integer equal to or greater than 1. The processing circuitry selects at least one of the first to N-th data based on the data selection condition related to the destination ID field including an identifier of the self-wireless communication device among the first to M-th destination ID fields. The processing circuitry creates a second frame having a data field including the data selected. The transmitter transmits the second frame.

Abstract: According to one embodiment, a communication apparatus includes an operation mode storage unit that stores a mode in which the communication apparatus operates as a wireless base station or a terminal and a non-volatile memory, wherein a transmission message is output to the outside when the communication apparatus operates as the wireless base station, data included in a received reception message is stored in the non-volatile memory when the communication apparatus operates as the terminal, and when the communication apparatus operates as the wireless base station, after all data transmitted from a first external wireless base station is received, if a communication quality with the first wireless base station is less than a predetermined value, and no message is received from a wireless base station other than the first wireless base station, a channel selection and switching process is performed, and then the operation mode is changed from the terminal to the wireless base station.