Abstract: According to one embodiment, a wireless relay device in a multi-hop network including at least a gateway device, the wireless relay device comprises a determination unit configured to determine whether a wireless device connected to the wireless relay device supports a routing protocol of the multi-hop network, and a notification unit configure to notify the gateway device or another wireless relay device in the multi-hop network of information for identifying the wireless device when the determination unit determines that the wireless device does not support the routing protocol.

Abstract: According to one embodiment, a wireless device includes an identification information generation unit, a framing unit, and a transmission unit. The identification information generation unit generates identification information for identifying a packet among all other flooding packets to be relayed on the wireless network by arithmetic processing. The framing unit generates a wireless frame when a packet is transmitted to another wireless device as an origin node. The wireless frame includes the packet and the identification information generated by the identification information generation unit. The transmission unit transmits the wireless frame including the packet and the identification information generated by the identification information generation unit.

Abstract: An electronic apparatus includes processing circuitry functioning as an acquisition part and a change part, and includes communication circuitry. The acquisition part acquires a control command regarding the volume of traffic per unit time. The change part changes a communication parameter to reduce the volume of traffic per unit time in accordance with the control command. The communication circuitry performs multi-hop wireless communications with the volume of traffic according to the changed communication parameter.

Abstract: According to an embodiment, an electronic apparatus includes communication circuitry and processing circuitry. The communication circuitry is configured to transmit a first packet to a first next hop and transmit a second packet to a second next hop in accordance with communication control information. The processing circuitry is configured to measure first information on the first packet transmitted to the first next hop, measure second information on the second packet transmitted to the second next hop, determine whether to change the communication control information based on both the first information and the second information, and change the communication control information if it is determined to change the communication control information.

Abstract: According to one embodiment, a wireless communication device includes: a receiver configured to receive a first frame which contains data; and a transmitter configured to transmit a second frame and a third frame by frequency multiplexing, the third frame containing the data and being addressed to a first relay station different from a sender device of the first frame. The second frame is a frame to instruct the sender device of the first frame to perform a frame transmission.

Abstract: An electronic apparatus includes processing circuitry functioning as an acquisition part and a change part, and includes communication circuitry. The acquisition part acquires a control command regarding the volume of traffic per unit time. The change part changes a communication parameter to reduce the volume of traffic per unit time in accordance with the control command. The communication circuitry performs multi-hop wireless communications with the volume of traffic according to the changed communication parameter.

Abstract: According to an embodiment, an electronic apparatus includes communication circuitry and processing circuitry. The communication circuitry is configured to transmit a first packet to a first next hop and transmit a second packet to a second next hop in accordance with communication control information. The processing circuitry is configured to measure first information on the first packet transmitted to the first next hop, measure second information on the second packet transmitted to the second next hop, determine whether to change the communication control information based on both the first information and the second information, and change the communication control information if it is determined to change the communication control information.

Abstract: According to an embodiment, a relay device includes a reception unit, a collection unit, a determination unit, a rewriting unit, and a transmission unit. The reception unit is configured to receive a wireless frame transmitted between a plurality of communication devices. The collection unit is configured to collect configuration information indicating a configuration of a wireless multi-hop network from the communication devices. The determination unit is configured to determine whether to relay the wireless frame on the basis of the configuration information. the rewriting unit is configured to rewrite a transmission destination address of the wireless frame to an address of the communication device of a relay destination specified on the basis of the configuration information and rewrite a transmission source address of the wireless frame to an address of the own device. The transmission unit is configured to transmit the wireless frame rewritten by the rewriting unit.

Abstract: According to one embodiment, a communication apparatus includes a congestion degree calculating unit and an operation mode setting unit. The congestion degree calculating unit calculates a third congestion degree related to wireless communication based on a first congestion degree of first wireless communication and a second congestion degree of second wireless communication. In the first wireless communication, peer-to-peer communication is performed directly between communication apparatuses, and in the second wireless communication, communication is performed through a wireless communication device. The operation mode setting unit switches an operation mode of the first wireless communication based on the third congestion degree to either of a mode in which the communication apparatus transmits content or a mode in which the communication apparatus receives content.

Abstract: A communication device according to an embodiment is included in a multi-hop network. The communication device includes a holder, a storage, a switcher, and a controller. The holder holds communication data. The storage stores path information including an identifier that identifies a communication path and destination information that indicates a destination of communication data on the communication path. The switcher switches a communication path used to transmit communication data on the basis of the path information stored in the storage. The controller transmits communication data to a destination of a communication path switched by the switcher.

Abstract: According to one embodiment, a wireless communication device includes: a receiver configured to receive a first frame which contains data; and a transmitter configured to transmit a second frame and a third frame by frequency multiplexing, the third frame containing the data and being addressed to a first relay station different from a sender device of the first frame. The second frame is a frame to instruct the sender device of the first frame to perform a frame transmission.

Abstract: According to an embodiment, a relay device includes a reception unit, a collection unit, a determination unit, a rewriting unit, and a transmission unit. The reception unit is configured to receive a wireless frame transmitted between a plurality of communication devices. The collection unit is configured to collect configuration information indicating a configuration of a wireless multi-hop network from the communication devices. The determination unit is configured to determine whether to relay the wireless frame on the basis of the configuration information. the rewriting unit is configured to rewrite a transmission destination address of the wireless frame to an address of the communication device of a relay destination specified on the basis of the configuration information and rewrite a transmission source address of the wireless frame to an address of the own device. The transmission unit is configured to transmit the wireless frame rewritten by the rewriting unit.

Abstract: A wireless communication device transmits data to a relay destination being one of first relaying devices capable of communicating out of relaying devices; obtains first information, from each first relaying device, that indicates a representative value of remaining operating times of relaying devices present on a relay route from the first relaying device to a target device; determines to perform a new route search, based on the first information; increases a transmission power; then transmits a request; receive responses from all or a part of second relaying devices, which are relaying devices that have received the request, including pieces of second information each of which indicates a representative value of remaining operating times of relaying devices present on a relay route from the second relaying device to the target device; and selects a relay destination of data from among the second relaying devices based on the pieces of second information.

Abstract: According to one embodiment, a communication apparatus includes a congestion degree calculating unit and an operation mode setting unit. The congestion degree calculating unit calculates a third congestion degree related to wireless communication based on a first congestion degree of first wireless communication and a second congestion degree of second wireless communication. In the first wireless communication, peer-to-peer communication is performed directly between communication apparatuses, and in the second wireless communication, communication is performed through a wireless communication device. The operation mode setting unit switches an operation mode of the first wireless communication based on the third congestion degree to either of a mode in which the communication apparatus transmits content or a mode in which the communication apparatus receives content.

Abstract: According to an embodiment, a wireless communication device includes a detector to detect a mobile object by referring to sensing information; a first communicating unit to communicate mobile object information, which is related to a detection result of the mobile object, with another wireless communication device; a first calculator to calculate a moving path of the mobile object between wireless communication devices by referring to the detection result of the mobile object and mobile object information received from the other wireless communication device; a second communicating unit to communicate movement information, which is related to the moving path of the mobile object, with the other wireless communication device; and a second calculator to calculate distances between wireless communication devices that are dependent on the number of times of movement in the moving path by referring to the calculated moving path and movement information received from the other wireless communication device.

Abstract: A communication device according to an embodiment is included in a multi-hop network. The communication device includes a holder, a storage, a switcher, and a controller. The holder holds communication data. The storage stores path information including an identifier that identifies a communication path and destination information that indicates a destination of communication data on the communication path. The switcher switches a communication path used to transmit communication data on the basis of the path information stored in the storage. The controller transmits communication data to a destination of a communication path switched by the switcher.

Abstract: According to an embodiment, a communication apparatus controls controllable nodes. The apparatus includes an acquisition unit and a generation unit. The acquisition unit acquires at least one of a first evaluation value indicating an occurrence frequency of a control request to a target controllable node and a second evaluation value indicating an occurrence frequency of communication error at the target controllable node. The generation unit generates identification information to be assigned to control the target controllable node in a manner such that a bit length of the identification information becomes shorter as at least one of the first evaluation value and the second evaluation value increases.

Abstract: A remote activating device remotely activates a device to be activated connected to a first network and a second network. The remote activating device includes a first interface connected to the first network, a second interface connected to the second network, an arrival confirmation processing unit that transmits an arrival attribute confirmation signal to the device to be activated using the first interface and confirms whether or not the arrival attribute confirmation signal has arrived at the device to be activated, and a judging unit that decides the first interface as an activation signal transmitting interface when the arrival attribute confirmation signal has arrived at the device to be activated and decides the second interface as the activation signal transmitting interface when the arrival attribute confirmation signal has not arrived at the device to be activated.

Abstract: A wireless communication device transmits data to a relay destination being one of first relaying devices capable of communicating out of relaying devices; obtains first information, from each first relaying device, that indicates a representative value of remaining operating times of relaying devices present on a relay route from the first relaying device to a target device; determines to perform a new route search, based on the first information; increases a transmission power; then transmits a request; receive responses from all or a part of second relaying devices, which are relaying devices that have received the request, including pieces of second information each of which indicates a representative value of remaining operating times of relaying devices present on a relay route from the second relaying device to the target device; and selects a relay destination of data from among the second relaying devices based on the pieces of second information.

Abstract: According to one embodiment, a communication device includes a start-up signal reception unit that receives a start-up signal that a start node transmits for starting up a node to be started; a first interface connected to Ethernet; a second interface connected to Ethernet; a power reception unit that receives PoE power through the first interface; a PoE controller that receives the start-up signal and PoE power and gives a transmission instruction of a start-up power signal which is a PoE power signal having a signal pattern corresponding to the start-up signal; and a power transmission unit that receives the transmission instruction from the PoE controller and transmits the start-up power signal through the second interface.