Toyota Jidosha Kabushiki Kaisha

Ryokichi Onishi

Masaaki Sasahara

Makiko Matsumoto

Hirochika Asai

Onur Altintas

Lei Zhong

Jing Ma

Mitsuhiro Nishibori

Satoshi Yamada

Toshihiko Watanabe

Akira Yoshioka

Toshiyuki Namba

Xiao Shao

Keiko Shimazaki

Takayuki Kusajima

Masahiro Ishiyama

Yusuke Doi

A map management system includes a plurality of servers that manage map data of a predetermined area. The plurality of servers each include: a storage that records a block chain; and a processor that stores, in the block chain, map update data for updating the map data, the map update data being generated based on data collected from a plurality of vehicles traveling in the area. The processor conducts verification of whether or not a plurality of pieces of map update data satisfy a predetermined verification policy by using a framework of the block chain, and updates the map data by selectively using map update data determined, as a result of the verification, as satisfying the verification policy and thus being valid, among the plurality of pieces of map update data.

Map management system

Provided are a communication device and a communication method for reducing a processing load at the time of receiving or transmitting data. A communication device according to an embodiment includes: a receiver that receives a connection request for transmitting data for an application, and receives the data after receiving the connection request; and a processor that notifies the application of the reception of the connection request after the data is received.

Communication device and communication method

According to one embodiment, a communication device includes: acquisition circuitry including a plurality of data acquirers configured to acquire data for transmission; processing circuitry configured to determine consecutive first sequence numbers for a plurality of pieces of the data acquired by the plurality of data acquirers, and to generate a plurality of packets that include the data acquired by the plurality of data acquirers and the first sequence numbers determined for the plurality of pieces of the data; and transmitting circuitry configured to transmit the plurality of packets wherein the packet includes an identifier that identifies the data acquirer having acquired the data in the packet or an identifier that identifies an application corresponding to the data in the packet.

Each of information processing apparatuses generates a local model by performing machine learning of a global model using local data. Each of the information processing apparatuses calculates an evaluation value according to an evaluation index. The information processing apparatuses exchange the calculated evaluation values by proximity communication. Each of the information processing apparatuses determines whether the evaluation value of the information processing apparatus has a high evaluation or not based on a result of comparison between the evaluation value and evaluation values of the other information processing apparatuses. At least one of the information processing apparatuses that has determined that the evaluation value has the high evaluation transmits local model information indicating the generated local model to a server apparatus.

Information processing method, information processing apparatus and server apparatus

A wireless communication device includes: a storage device that stores information indicating a correspondence between an identifier and a priority that are used in data transmission; and one or more processors configured to acquire data for transmission, identify the priority of the data for transmission acquired by the one or more processors, based on the identifier of the data for transmission and the information stored in the storage device, determine, based on the priority identified by the one or more processors, a wireless communication service to be used to transmit the data for transmission, among a plurality of wireless communication services that have different communication costs and different real-time performances of transmission, respectively, and transmit the data for transmission by using the wireless communication service that is determined.

Wireless communication device, wireless communication system, and wireless communication method

A radio communication system in which a master node collects data acquired by a plurality of sensor nodes. The master node transmits, to the plurality of sensor nodes, a data transmission request including held data information that is information related to data already held by the master node. The sensor node transmits, to the master node, data not held by the master node on the basis of the held data information, and transfers the data transmission request to another sensor node.

Radio communication system and radio communication method

A wireless communication device has: wireless communication unit; calculation unit for calculating an evaluation value based on an opportunity for communication with the access providing device; transmission unit for transmitting the evaluation value to the other wireless communication device; acquisition unit for acquiring an evaluation value for the other wireless communication device; and communication control unit. When the other wireless communication device has more opportunities for communication than the wireless communication device does, the communication control unit preferably transmits uplink information, but when the other wireless communication device has less opportunity for communication than the wireless communication device does, the communication control unit preferably transmits downlink information.

Wireless communication device and communication method

A wireless terminal includes: an intercept mode evaluation unit configured to evaluate a congestion state of wireless resources, based on a communication state of other terminals intercepted during executing an intercept mode, which is a mode of intercepting communication by the other terminal; and a transmission mode execution unit configured to execute a transmission mode, in which the wireless terminal performs transmission and reception, without executing the intercept mode when the intercept mode evaluation unit evaluates that an off-time has set in.

Wireless terminal and communication control method

An in-vehicle device includes: a first communicator for inter-vehicle communication; a second communicator for communication with a predetermined transmission destination; and a storage configured to store first information pieces and a list including respective identification information pieces of the first information pieces; and a controller. The controller exchanges lists with a first in-vehicle device through the first communicator, and at a predetermined timing for transmitting the first information pieces stored in the storage to the predetermined transmission destination through the second communicator, when a predetermined condition is met, the controller does not transmit a first information piece included in the first information pieces and provided with an identification information piece included in both the list stored in the storage and a first list received from the first in-vehicle device and including respective identification information pieces of first information pieces each held by any of the other in-vehicle devices.

In-vehicle device, information processing method and computer-readable medium

A data transmission device that transmits data to another node, the data transmission device including: data storing unit for storing data; summary information storing unit for classifying data stored in the data storing unit into prescribed groups and for storing summary information that represents the number of pieces of data for each group; receiving unit for receiving summary information from the other node; selecting unit for selecting data to be transmitted based on the summary information received from the other node; and transmitting unit for transmitting the data selected by the selecting unit. The selecting unit favorably preferentially selects data included in a group with a smaller number of pieces of data based on the summary information received from the other node. Due to such a configuration, information with a high possibility of not being possessed by a communication partner can be selected and transmitted in a data sharing system.

Data transmission device, data sharing system, data sharing method, and message exchanging system

An information request describing an attribute of necessary data is distributed from a center server to a mobile terminal via an edge server; the mobile terminal transmits data, which is requested in the information request, to the edge server; the edge server notifies the center server to the effect that the data, which is requested in the information request, has been acquired; the center server distributes, with respect to data acquired by the edge server from the mobile terminal, non-necessity information indicating that collection of the data is unnecessary to the edge server and to the mobile terminal via the edge server; and when the mobile terminal receives the non-necessity information, the mobile terminal suspends acquisition of data, of which collection is deemed unnecessary in the non-necessity information, and, when the data is stored, discards the data.

Distributed data processing system, center server, edge server, mobile terminal, and method

An apparatus which transfers information transmitted from a master node or addressed to the master node, comprises a generation unit that generates an assessment value representing logical proximity to the master node; a transmit unit that sends/receives the assessment value to/from other apparatuses; and a communication unit that, when this apparatus is an apparatus that is logically closest to the master node within a communication range, transmit information having the master node as a transmission source to other apparatuses or receive information addressed to the master node from the other apparatuses; otherwise, transmit information addressed to the master node to the logically closest apparatus or receive information having the master node as a transmission source from the logically closest apparatus.

Wireless communication apparatus and wireless communication method using wireless LAN client

In a communication method in a wireless communication system configured from a wireless connection providing apparatus (a wireless LAN access point) and a wireless communication apparatus (a wireless LAN client), the wireless connection providing apparatus acquires subscription information for specifying necessary information and includes the subscription information in a control frame notifying surroundings of presence of itself and then transmits the subscription information. The wireless communication apparatus receives the control frame, determines whether the wireless communication apparatus retains information which is specified as being necessary by the subscription information included in the control frame. When the wireless communication apparatus retains the information, the wireless communication apparatus establishes connection to the wireless connection providing apparatus and transmits the information. The subscription information can be stored in an ESSID of a beacon frame, for example.

Communication method in vehicular wireless communication system and vehicular wireless communication system for transmission of necessary information only from a sensor to the network

Growing community of inventors

Tokyo, Japan

Ryokichi Onishi