Mitsubishi Electric Corporation

Shusaku Umeda

Takashi Asahara

Takeshi Suehiro

Teruko Fujii

Mari Ochiai

Masaaki Takeyasu

Kazumasa Suzuki

Kenichi Nakura

Hiroyasu Sano

Yasunori Kato

Toshinori Hori

Koshiro Ishihara

Hiroshi Nishimoto

Akinori Taira

Akihiro Okazaki

Yasushi Matsutaka

Masatsugu Higashinaka

Shinji Masuda

Kaoru Tsukamoto

Yusuke Kinoshita

Akiko Iwasaki

Akinori Ohashi

Kanako Yamaguchi

A communication resource allocation device () identifies a hazardous behavior that may cause a traffic accident and has occurred in each of monitoring target areas included in a communication area of a base station () in a past reference period, so as to determine a hazard level for each of the monitoring target areas. The communication resource allocation device () allocates communication resources to each of the monitoring target areas based on the determined hazard level. The communication resource allocation device () distributes information to a roadside device () and an in-vehicle device () in each of the monitoring target areas, using the allocated communication resources.

Communication resource allocation device, communication resource allocation method, and computer readable medium

A server device includes a support information generation unit, a condition determination unit, and a resource calculation unit. The support information generation unit generates support information for each support-provided area using information from a communication terminal. The condition determination unit determines a support information generation condition being a condition concerning the support information to be generated by the support information generation unit, based on area situation information representing a situation thereof. The resource calculation unit calculates, based on the support information generation condition, amounts of calculation resource and amounts of communication resource of each support-provided area not to cause a sum of the amounts of calculation resource required in each support-provided area and a sum of the amounts of communication resource for use between the server device and a mobile terminal, to exceed total calculation/communication resource upper limit values available in all the support-provided areas.

Server device, control circuit, storage medium, and traffic support method

A communication management device () estimates communication quality between a control device () mounted on a moving object () and a driving assistance device () to provide a driving assistance service for the control device (), at a scheduled time when the moving object () passes through a communication area, which includes a scheduled path where the moving object () passes. The communication management device () notifies the driving assistance device () when the communication quality is outside a range of quality being a standard. When it is notified, the driving assistance device () changes the driving assistance service to be provided for the control device ().

Communication management device, communication management method, driving support device, driving support method and computer readable medium

A processing device that is an edge computer connected to a base station communicatable with a vehicle in a service area includes: a request generation unit generating a first request including location information and a range from the location information specifying a region in which information sharing is requested, and an identifier from which a demander that requests the information sharing is identifiable; an accepted request holding unit holding a second request based on an information sharing demand from another processing device when shared information regarding the region is sendable in response to the second request; and a request location information inquiry unit generating the shared information including a cognitive event and the identifier held in the accepted request holding unit when location information indicating a cognitive event occurrence point acquired from the vehicle via the base station is included in a region specified by the second request information.

Processing device, communication device, communication system, control circuit, storage medium, and information sharing method

A wireless ranging system includes a ranging terminal that transmits a wireless signal including a ranging signal and a communication signal indicating an order of ranging with respect to a first ranging target terminal and a second ranging target terminal, and a first ranging target terminal and a second ranging target terminal that, when receiving the wireless signal, respectively transmits a first response signals and a second response signals consecutively a plurality of times to the ranging terminal. For each time the ranging terminal receives each of the plurality of response signals, the ranging terminal measures an elapsed time from transmission of the wireless signal, and calculates a relative distance between the ranging terminal and the ranging target terminals from a propagation time of each of the plurality of response signals calculated using the elapsed time.

Wireless ranging system

A communication device () receives internal electric waves () emitted toward inside a vehicle () by an internal communicator () mounted in the vehicle (), and receives external electric waves () emitted toward outside the vehicle () by an external communicator () mounted in the vehicle (). The communication device () determines whether the communication device () is inside the vehicle () or outside the vehicle (), from a reception intensity of the received internal electric waves () and from a reception intensity of the received external electric waves ().

Communication device, communication system, communication method, and computer readable medium

A virtual map generation unit () generates a virtual map of a subjected area by dividing the subjected area into role areas each of which corresponds to each of a plurality of roles, based on the number of vehicles scheduled to travel in the subjected area specified from work plan information on a transportation work of loads by a vehicle and based on the number of loads scheduled to be placed in the subjected area specified from the work plan information. A distribution unit () distributes to the vehicle traveling in the subjected area, the virtual map generated by the virtual map generation unit ().

Traffic management apparatus, traffic management method, and computer readable medium

A wireless communication apparatus that allocates radio resources is a base station or a mobile station that transmits a data series on a frequency channel in a frequency hopping pattern corresponding to a radio resource time slot. The apparatus includes a transmission quality measurement unit that measures radio waves in a frequency band used in the transmission of the data series and evaluates transmission quality, and the radio resources including a reserved resource and spare resources, a resource allocation unit that allocates, to the mobile station lower than or equal to a threshold value in transmission quality of a frequency channel used in a reserved resource time slot, a time slot that improves frequency channel transmission quality, of spare resource time slots. The mobile station transmits the data series, using the spare resource time slot when allocation information on the spare resource is obtained, or using the reserved resource time slot when the allocation information on the spare resource is not obtained.

Wireless communication apparatus, wireless communication system, wireless communication method, control circuit, and recording medium

A radio transmission device includes: a known signal generating unit that generates a first known signal and a second known signal mapped in such a manner that subcarriers for transmitting a first signal not being 0 do not overlap with each other in symbols of one time band; an IDFT unit that converts the first known signal and the second known signal from a frequency domain signal into a time domain signal; a GI inserting unit that inserts a guard interval into the first known signal and the second known signal converted into time domain signals; a transmission antenna that transmits the first known signal in which the guard interval is inserted; and a transmission antenna that transmits the second known signal in which the guard interval is inserted.

Radio transmission device, radio reception device, radio communication device, radio communication system, radio transmission method, control circuit, and recording medium

A reception device includes: a reception unit receiving transmission signals; a splitting unit splitting received signals into real component and imaginary component; a narrowing unit narrowing down possible signal point candidates of real component of the signal and imaginary component of the signal to signal point candidates based on the real component and the imaginary component of the split received signal; a signal point candidate hypothesizing unit hypothesizing one signal point candidate of real component from the signal point candidates of real component obtained by narrowing-down and hypothesizing one signal point candidate of imaginary component from the signal point candidates of imaginary component obtained by narrowing-down; and a signal estimation value calculating unit estimating real component of the signal based on the one hypothesized real component signal point candidate and estimating imaginary component of the signal based on the one hypothesized imaginary component signal point candidate.

Reception device, reception method, and communication system

A communication device includes a signal determiner determining whether there is a reception signal, and a period estimator estimating an interruption period of interruption of a signal transmitted from a device as a source of the reception signal, using a determination result from the signal determiner. The period estimator includes a differential operator calculating a differential value of the determination result, a masking operator calculating a provisional period of the interruption period using the differential value, controlling use of the differential value and provisional period based on internal state, and outputting the provisional period to be used, a period calculator calculating the interruption period using the provisional period, a signal existing section calculator calculating a signal existing section using the provisional period, a periodic timing estimator estimating periodic timing using the provisional period and signal existing section, and a state determiner determining the internal state using the interruption period.

Communication device, method for predicting interruption, control circuit, and program recording medium

A wireless receiving device includes a signal measurement unit; a weighting factor generation unit that generates weighting factors each for suppression of the received signals, based on measurement results of the received signals; interference suppression units that each perform, in a parallel manner, interference suppression processing on the received signals, using, one of the weighting factors; arrival detection units that are connected in one-to-one to the interference suppression units, the arrival detection units each detecting arrival of a desired signal; an arrival determination unit that determines whether the desired signal has arrived; and a demodulation processing unit that demodulates the received signals when the arrival determination unit determines that the desired signal has arrived.

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Tokyo, Japan

Shusaku Umeda