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11.发明申请公开(公告)号：US20200151971A1
公开(公告)日：2020-05-14
申请号：US16740063
申请日：2020-01-10
Applicant: DENSO CORPORATION
Inventor： Tomoya OGAWA , Hiroyuki KISHITA , Takashi UEFUJI , Tsuneo NAKATA
IPC: G07C5/08 , G06F16/23 , G07C5/00 , G06F16/182 , H04L9/06
Abstract: A ledger management system includes multiple ledger management devices communicably connected to each other. The ledger management devices have a same distributed ledger. Each ledger management device includes the distributed ledger, an agreement determination unit, and a ledger storage unit. The distributed ledger stores ledger information, including specific information specific to a previous ledger information and present vehicle information obtained from a vehicle, that is generated by one of the ledger management devices. The agreement determination unit determines whether the ledger information generated by the one of the ledger management devices satisfies an agreement rule. The ledger storage unit stores the ledger information in the distributed ledger when the ledger information satisfies the agreement rule, and does not store the ledger information in the distributed ledger when the ledger information does not satisfy the agreement rule.
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公开(公告)号：US20160345133A1
公开(公告)日：2016-11-24
申请号：US15156365
申请日：2016-05-17
Applicant: DENSO CORPORATION
Inventor： Toru NAGURA , Tsuneo NAKATA
IPC: H04W4/02 , H04B17/318 , H04W4/04
CPC classification number: H04W4/029 , H04B17/318 , H04W4/046
Abstract: A wireless positioning terminal includes a wireless receiver receiving reception signals from a wireless transmitter via multiple communication links. A multi-link-base reception informational item is determined by evaluating reception signals via the communication links. The multi-link-base reception informational item, which has a value varying with a position of the wireless positioning terminal, varies with the position differently from an informational item of a reception signal via one of the communication links. A base trajectory is stored which represents correspondence relation about points between (i) a position of the wireless positioning terminal and (ii) the multi-link-base reception informational item. A measured trajectory is generated which represents correspondence relation about points between (i) a calculated position variation and (ii) the multi-link-base reception informational item. A current position of the wireless positioning terminal is estimated based on a matching between the base trajectory and the measured trajectory.
Abstract translation: 无线定位终端包括经由多个通信链路从无线发射机接收接收信号的无线接收机。 通过通过通信链路评估接收信号来确定多链路基接收信息项。 具有随着无线定位终端的位置而变化的值的多链路基接收信息项随着通过通信链路之一与接收信号的信息项不同的位置而变化。 存储基本轨迹，其表示关于（i）无线定位终端的位置与（ii）多链路基接收信息项之间的点的对应关系。 产生测量轨迹，其表示关于（i）计算出的位置变化与（ii）多链路基接收信息项之间的点的对应关系。 基于基本轨迹和测量轨迹之间的匹配来估计无线定位终端的当前位置。
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公开(公告)号：US20150219745A1
公开(公告)日：2015-08-06
申请号：US14608320
申请日：2015-01-29
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA
IPC: G01S5/02
CPC classification number: G01S5/0278 , G01S5/0252 , G01S5/0294
Abstract: In a wireless positioning apparatus mounted in a moving body, feature point position information is stored in a reference trajectory storage, a reception state of transmitted waves from a wireless transmitter is detected, and a movement distance of the moving body is measured. A positioning trajectory is generated that indicates a correspondence relationship between the movement distance and the reception state of transmitted waves. A coincidence distribution is generated that indicates a correspondence between: a point on the reference trajectory to which a representative position, set arbitrarily within the positioning trajectory, corresponds for each coordinate shift value; and the degree of coincidence between the reference trajectory and the positioning trajectory. Based on the coincidence distribution, positioning information is generated. Reliability is determined based on an evaluation value reflecting a flatness of the coincidence distribution. The reliability serves as a determination criterion for determining whether or not the positioning information is used.
Abstract translation: 在安装在移动体中的无线定位装置中，将特征点位置信息存储在参考轨迹存储器中，检测来自无线发射机的发送波的接收状态，并测量移动体的移动距离。 产生指示移动距离与发送波的接收状态之间的对应关系的定位轨迹。 产生符合分布，其指示：在定位轨迹中任意设定的代表性位置对于每个坐标移位值的参考轨迹上的点; 以及参考轨迹与定位轨迹之间的重合程度。 基于重合分布，生成定位信息。 基于反映一致分布的平坦度的评价值来确定可靠性。 可靠性用作确定定位信息是否被使用的确定标准。
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14.发明申请公开(公告)号：US20250023806A1
公开(公告)日：2025-01-16
申请号：US18764425
申请日：2024-07-05
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA
IPC: H04L43/0864 , H04L43/0829
Abstract: By a communication device, a round-trip time estimation method, or a non-transitory computer-readable storage medium storing a round-trip time estimation program, sequence information of a communication packet and a reception confirmation packet are acquired, a round-trip time is estimated based on an acquisition result and three timings: two transmission times and a reception time.
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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.
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Patent Agency Ranking
公开(公告)号：US20230026835A1
公开(公告)日：2023-01-26
申请号：US17867721
申请日：2022-07-19
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA , Kousuke YAMAOKA
Abstract: A communication device controls a first communication flow performed by a first terminal and a second communication flow performed by a second terminal. Both of the first communication flow and the second communication flow pass through a sharing section, and the second communication flow has a higher priority than a priority of the first communication flow. The communication device acquires a communication delay in the sharing section; acquires a rated delay of the second communication flow, the rated delay is a communication delay allowed to the second communication flow; and limits input of data from the first communication flow and the second communication flow to the sharing section based on a comparison result between the communication delay of the sharing section and the rated delay.
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公开(公告)号：US20230006905A1
公开(公告)日：2023-01-05
申请号：US17809440
申请日：2022-06-28
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA
IPC: H04L43/0852 , H04L1/18 , H04L41/147 , H04L43/0823
Abstract: A redundant communication apparatus includes a determining unit and a transmitting unit. The determining unit determines an upper limit of a redundancy level when transmission waiting data in a transmission apparatus is made redundant and transmitted, based on a data quantity of the transmission waiting data and a communication speed of a communication line between a reception apparatus that is a transmission destination of the transmission waiting data and the transmission apparatus. The transmitting unit causes the transmission waiting data to be made redundant at a redundancy level that is equal to or less than the upper limit determined by the determining unit and transmits the data to the reception apparatus via the communication line.
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公开(公告)号：US20220417127A1
公开(公告)日：2022-12-29
申请号：US17809117
申请日：2022-06-27
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA
IPC: H04L43/0876 , H04L43/04 , H04L43/026
Abstract: In a bandwidth estimation device, a measurement unit measures a measurement time from reception by a receiver of a first packet of a packet train including a plurality of packets that are sequentially transmitted from a transmitter via a communication line to reception by the receiver of a last packet of the packet train, An estimation validity determination unit compares the measurement time with a threshold time predefined based on performance of the receiver or characteristics of the communication line to determine whether a valid estimate of an available bandwidth of the communication line can be made. In response to the estimation validity determination unit determining that a valid estimate of the available bandwidth can be made, an estimation unit estimates the available bandwidth of the communication line based on an amount of data in the packet train and the measurement time.
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公开(公告)号：US20190253948A1
公开(公告)日：2019-08-15
申请号：US16267746
申请日：2019-02-05
Applicant: DENSO CORPORATION
Inventor： Toru NAGURA , Tsuneo NAKATA
Abstract: A mobile system communication apparatus is configured to perform a selection of either (i) transmitting a transmission data with a present communication characteristic or (ii) transmitting the transmission data with an advantageous communication characteristic that is more advantageous than the present communication characteristic, from a result of comparison between a target communication quality and a predicted communication quality that is predicted when communicating with the advantageous communication characteristic based on (i) a predicted position of a mobile communication apparatus and a correspondence relationship between a position and a communication characteristic used by the mobile communication apparatus.
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公开(公告)号：US20190090139A1
公开(公告)日：2019-03-21
申请号：US16194786
申请日：2018-11-19
Applicant: DENSO CORPORATION
Inventor： Tsuneo NAKATA
IPC: H04W16/18
Abstract: In a wireless communication system, a mobile communication apparatus judges the reception quality available at its current position for direct reception of information transmitted from a fixed wireless station, with the judgement based upon the current position and upon a reception quality map expressing a relationship between reception positions and corresponding reception quality values. If the reception quality at the current position is judged to be sufficient, direct reception is executed, while otherwise, a limitation is placed upon such direct reception, for example by postponing the direct reception until reaching a position at which the reception quality will be sufficient.
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