Abstract: According to an embodiment, a confirming work supporting device includes a storage and processing circuitry. The storage is configured to store therein RSSI (Received Signal Strength Indicator) information that indicates reception strength of a wireless signal as measured by each of a plurality of installed wireless devices, from another wireless device. The processing circuitry is configured to determine, based on the RSSI information, a confirming order in which positions of the plurality of wireless devices are to be confirmed, and output, based on the confirming order, instruction information for an instruction to confirm a positon of a wireless device whose position is to be confirmed next.

Abstract: According to one embodiment, a memory stores a first information including a positional relationship among a plurality of positional candidates, a second information including an influence on the plurality of positional candidates due to at least any of an attenuation and a reflection of a radio wave by an object located at a periphery of the plurality of positional candidates, and a third information including a first received signal strength indicator of the radio wave transmitted from a first wireless communication device and received by a second wireless communication device. A processor estimates a position of the second wireless communication device from the plurality of positional candidates, based on a first value as the first received signal strength indicator corrected with a first correction value based on the second information, and a plurality of first distances between the first wireless communication device and each of the plurality of positional candidates.

Abstract: According to one embodiment, a memory stores a first information including a positional relationship among a plurality of positional candidates, a second information including an influence on the plurality of positional candidates due to at least any of an attenuation and a reflection of a radio wave by an object located at a periphery of the plurality of positional candidates, and a third information including a first received signal strength indicator of the radio wave transmitted from a first wireless communication device and received by a second wireless communication device. A processor estimates a position of the second wireless communication device from the plurality of positional candidates, based on a first value as the first received signal strength indicator corrected with a first correction value based on the second information, and a plurality of first distances between the first wireless communication device and each of the plurality of positional candidates.

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 an embodiment, a calculation method is for performing calculation on a wireless network including multiple terminals and multiple base stations. The method includes calculating a first probability with which a first base station and a second terminal are capable of connection with (h?1) hops, h being a finite integer equal to or larger than 2, and a first terminal and the second terminal are capable of direct connection with each other, by using a probability with which the first terminal and the second terminal are capable of direct connection with each other and a probability with which the second terminal and the first base station are capable of direct connection with each other; and calculating a second probability with which the first terminal is capable of connection with at least one of the base stations with h hops by using the first probability.

Abstract: A radio base station performs wireless communication with a wireless terminal. The radio base station includes a directivity pattern specifying unit, a communication unit, and a signal processor. The directivity pattern specifying unit specifies plural directivity patterns. The communication unit receives a search request frame from the wireless terminal, sends to the wireless terminal a search response frame which is a response to the search request frame, with at least one, specified by the directivity pattern specifying unit, of the directivity patterns, and receives a delivery acknowledgment frame for the search response frame from the wireless terminal with the directivity patterns specified by the directivity pattern specifying unit. The signal processor calculates, for each specified directivity pattern, a radio wave intensity of the delivery acknowledgment frame.

Abstract: According to an embodiment, a calculation method is for performing calculation on a wireless network including multiple terminals and multiple base stations. The method includes calculating a first probability with which a first base station and a second terminal are capable of connection with (h?1) hops, h being a finite integer equal to or larger than 2, and a first terminal and the second terminal are capable of direct connection with each other, by using a probability with which the first terminal and the second terminal are capable of direct connection with each other and a probability with which the second terminal and the first base station are capable of direct connection with each other; and calculating a second probability with which the first terminal is capable of connection with at least one of the base stations with h hops by using the first probability.

Abstract: A communication device includes a signal processing device, a transceiver, and a controller. The signal processing device uses a first signal medium. The transceiver communicates with at least one of first devices by using a second signal medium. The controller controls usage of the first signal medium by the communication device and the at least one of first devices by communicating with the at least one of first devices by the transceiver.

Abstract: According to one embodiment, a monitoring apparatus includes a communication unit and a determination unit. The communication unit is configured to calculate a first indicator value and a second indicator value, the first indicator value relating to a received signal strength at a time when a packet transmitted from a first wireless device is received, the second indicator value relating to a received signal strength at a time when carrier sense is executed. The determination unit is configured to determine a state of the first wireless device to be one of three or more states, by performing a state determination using the first indicator value and the second indicator value, with a current state of the first wireless device being set as a basic point.

Abstract: According to this embodiment, a position estimating device, that estimates a position of a target wireless device, includes a storage that stores positions of a plurality of reference wireless devices, a receiver which is notified of a received signal strength indicator value in signal transmission and reception between the target wireless device and each reference wireless device, a calculator that calculates a standard deviation for a probability distribution of a distance between the target wireless device and each reference wireless device, using the received signal strength indicator value, a first estimator that calculates an estimated distance between the target wireless device and each reference wireless device, using the received signal strength indicator value, and a second estimator that calculates the position of the target wireless device, using the standard deviation, the estimated distance, and the positions of the plurality of reference wireless devices.

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 failure detection apparatus includes a communicator, a selector, an execution unit, and a determiner. The communicator communicates with a wireless terminal mounted on a moving object via at least one of first bridge devices located at predetermined positions. The selector selects second bridge devices from the first bridge devices. The execution unit executes test connections to the wireless terminal using the second bridge devices. The determiner determines that the wireless terminal is inoperative if the test connection via any of the second bridge devices has failed.