公开(公告)号：US20230328537A1

公开(公告)日：2023-10-12

申请号：US18333208

申请日：2023-06-12

Applicant: DENSO CORPORATION

Inventor： Shigeki KAWAI ,  Daiki MAEMOTO ,  Tsuneo NAKATA

IPC: H04W16/18

CPC classification number: H04W16/18

Abstract: A radio wave map provision device includes a radio wave map storage that stores a radio wave map. The radio wave map includes reference position information indicating a reference position, a communication speed with each external communication device at the reference position, and a connection probability indicating a probability of performing wireless communication with each external communication device at the reference position. The radio wave map provision device: receives the radio wave map request including request position information indicating a request position; obtains a lowest guaranteed speed and an estimated speed, at the reference position, based on the communication speed and the connection probability; and transmits a radio wave map reply including the connection probability, the lowest guaranteed speed, and the estimated speed, at the reference position corresponding to the request position information.

公开(公告)号：US20130310067A1

公开(公告)日：2013-11-21

申请号：US13896620

申请日：2013-05-17

Applicant: DENSO CORPORATION

Inventor： Tsuneo NAKATA ,  Shigeki KAWAI

IPC: H04W64/00

CPC classification number: H04W64/00 ,  G01S7/003 ,  G01S11/06 ,  G01S13/931 ,  G01S2013/936 ,  G08G1/0112 ,  G08G1/0133

Abstract: In a wireless communication apparatus, data transmitted from at least one wireless transmitter is received by direct wireless communication, and its wireless reception condition is detected. Relation reference information setting two or more relations between the wireless reception condition on a reception of transmitted data and location information of the transmitter is stored. Relative distance information of a relative distance between the transmitter and the apparatus is measured. Relation information indicating a relation between the wireless reception conditions and the relative distance information is generated. A relation between the location information and the relative distance information is determined by comparing the relation reference information and the relation information. A current location of the apparatus is determined on the basis of the relation between the location information and the relative distance information and a current wireless reception condition.

Abstract translation: 在无线通信装置中，通过直接无线通信接收从至少一个无线发射机发送的数据，并检测其无线接收状况。 存储在接收发送数据的无线接收条件与发送器的位置信息之间设定两个以上关系的关系参照信息。 测量发射机和设备之间的相对距离的相对距离信息。 产生指示无线接收条件与相对距离信息之间的关系的关系信息。 通过比较关系参考信息和关系信息来确定位置信息与相对距离信息之间的关系。 基于位置信息和相对距离信息与当前无线接收条件之间的关系来确定装置的当前位置。

公开(公告)号：US20210116577A1

公开(公告)日：2021-04-22

申请号：US17137161

申请日：2020-12-29

Applicant: DENSO CORPORATION

Inventor： Kiyoto NOGUCHI ,  Nobuyuki TAGUCHI ,  Takashi MURASE ,  Shigeki KAWAI

IPC: G01S19/07

Abstract: A positioning system includes: multiple positioning devices: and a center device that communicates with each of the multiple positioning devices. At least one positioning device is usable at a moving body, and includes: a positioning calculator that calculates a location dependence delay amount and a propagation distance and calculates a current position of the at least one positioning device; and a positioning communication portion that transmits the location dependence delay amount. The center device includes: an update portion that updates a distribution location dependence delay amount; and a distribution communication portion that transmits the distribution location dependence delay amount to at least one of the multiple positioning devices.

公开(公告)号：US20230247540A1

公开(公告)日：2023-08-03

申请号：US18298272

申请日：2023-04-10

Applicant: DENSO CORPORATION

Inventor： Daiki MAEMOTO ,  Tsuneo NAKATA ,  Shigeki KAWAI

IPC: H04W48/16 ,  H04W48/20 ,  G01S5/02

CPC classification number: H04W48/16 ,  H04W48/20 ,  G01S5/02521

Abstract: A radio wave map generator device includes a receiving unit, a communication speed calculation unit, a connection probability calculation unit, and a storage unit. The receiving unit is configured to receive pieces of probe information each of which contains location information, propagation environment information, and external communication device identification information. The communication speed calculation unit is configured to calculate a first communication speed, and a second communication speed. The connection probability calculation unit is configured to calculate a first connection probability, and a second connection probability. The storage unit is configured to store the location information, external communication device identification information, the first communication speed, the second communication speed, the first connection probability, and the second connection probability.

公开(公告)号：US20230232271A1

公开(公告)日：2023-07-20

申请号：US18187581

申请日：2023-03-21

Applicant: DENSO CORPORATION

Inventor： Shigeki KAWAI ,  Tsuneo NAKATA

IPC: H04W28/02 ,  H04W72/0446

CPC classification number: H04W28/0226 ,  H04W28/0236 ,  H04W72/0446

Abstract: A data transmission device includes a wireless communication unit that wirelessly communicates with an external communication device, a travel route information acquirer that acquires a future travel route of a moving object, a travel route, a propagation environment information acquirer that acquires propagation environment information of a radio wave propagation path used in wireless communication, a speed information acquisition unit that acquires the moving speed of a moving object, and a converter that converts a relationship between the travel route and propagation environment information into a plurality of data slots each defined by the communication speed per unit time; a transmission instructor that instructs the wireless communication unit to transmit the data allocated to the data slot.