公开(公告)号：US20250085360A1

公开(公告)日：2025-03-13

申请号：US18829367

申请日：2024-09-10

Applicant: DENSO CORPORATION

Inventor： Akira TADA ,  Tomohisa KISHIGAMI ,  Tomoya TOKUNAGA ,  Ryota KAMEOKA ,  Yoji HOMMA

IPC: G01R31/74 ,  G01R31/52

Abstract: A communication system includes a first control device that receives a power supply from a power source via a first electronic fuse, a second control device that is data-communicably connected to the first control device and receives a power supply from the power source via a second electronic fuse, a management device that is data-communicably connected between the first control device and the second control device; a switching control section configured to execute switching control to switch the first electronic fuse and the second electronic fuse between an on state and an off state, a diagnostic information storage section configured to store diagnostic information related to communication with the first control device, and a state information storage section configured to store first fuse state information related to a state of the first electronic fuse, which is referred to for invalidating the diagnostic information.

公开(公告)号：US20220179663A1

公开(公告)日：2022-06-09

申请号：US17537709

申请日：2021-11-30

Applicant: DENSO CORPORATION

Inventor： Akira TADA ,  Tomohisa KISHIGAMI

IPC: G06F9/4401 ,  H04L12/10

Abstract: A network system includes at least one transmission path and a plurality of terminal devices each connected to the transmission path. Each of the terminal devices includes a transceiver, a startup processing unit, and a switching unit. The transceiver is configured to operate either one of a first standby unit and a second standby unit according to a switching instruction. The switching unit is configured to output the switching instruction to the transceiver to operate the second standby unit when a transmission path empty period lasts for a predetermined preparation time or more after a non-designation period has lasted for a predetermined operation determination time or more.

公开(公告)号：US20180041358A1

公开(公告)日：2018-02-08

申请号：US15498861

申请日：2017-04-27

Applicant: DENSO CORPORATION

Inventor： Tomohisa KISHIGAMI ,  Shuichi NAKAMURA

IPC: H04L12/40 ,  H04B1/40 ,  H04L1/24

CPC classification number: H04L12/40 ,  H04B1/40 ,  H04L1/248 ,  H04L12/40045 ,  H04L43/0823 ,  H04L2012/40215

Abstract: In a communication device, when an enabling signal is at a high level and a transmit data is at a high level, that is, in a recessive period, both transistors turn off and both transistors turn off. Thus, potentials of signal lines are determined by power supply from a second transmitting part to a communications network. When an error frame arises in this state, that is, transistors in the other ECU turn on, excessive currents flow the signal lines. When current monitoring circuits detect error currents, an error signal is changed to a high level.

公开(公告)号：US20160065298A1

公开(公告)日：2016-03-03

申请号：US14821879

申请日：2015-08-10

Applicant: DENSO CORPORATION

Inventor： Tetsuo NAKAGAWA ,  Tomohisa KISHIGAMI

IPC: H04B7/155 ,  H04L12/931 ,  H04B1/3822

CPC classification number: H04B7/15528 ,  H04B1/3822 ,  H04B7/15542

Abstract: A relay apparatus provided to a vehicle, performing first data communication with a first communication apparatus arranged outside the vehicle, and performing at least second data communication with multiple second communication apparatuses provided to the vehicle is provided. The relay apparatus includes a permission determination portion and an initiation switch portion. The permission determination portion determines whether first data communication between the first communication apparatus and a target second communication apparatus is permitted. The permission determination portion receives the first communication frame from the first communication apparatus through a connection switch portion determining a connection destination according to a control signal. The initiation switch portion outputs to the connection switch portion, the control signal designating the target second communication apparatus as the connection destination of the first communication apparatus.

Abstract translation: 提供给车辆的中继装置，与布置在车辆外部的第一通信装置进行第一数据通信，并且与提供给车辆的多个第二通信装置进行至少第二数据通信。 中继装置包括许可确定部分和启动开关部分。 许可确定部分确定是否允许第一通信装置和目标第二通信装置之间的第一数据通信。 许可确定部分通过根据控制信号确定连接目的地的连接开关部分从第一通信设备接收第一通信帧。 启动开关部分向连接开关部分输出指定目标第二通信装置的控制信号作为第一通信装置的连接目的地。

公开(公告)号：US20140169419A1

公开(公告)日：2014-06-19

申请号：US14134338

申请日：2013-12-19

Applicant: ANDEN CO., LTD. ,  DENSO CORPORATION

Inventor： Hideki KASHIMA ,  Tomohisa KISHIGAMI ,  Naoji KANEKO ,  Nobutomo TAKAGI

IPC: H04B1/40

CPC classification number: H04B1/40 ,  B60R16/03 ,  H04J3/0697 ,  H04L7/033 ,  H04L12/4035 ,  H04L25/03834 ,  H04L25/4902 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: A transceiver that transmits and receives data used in a communication system, in which the data is encoded by a transmission line code and a signal level of the transmission code changes at a predetermined transition timing in a bit-duration. The transceiver includes: a clock generator that generates an internal clock used for internal circuits; a timing generator that generates, by using the internal clock generated by the clock generator, a timing signal synchronized to a reference clock supplied externally; an encoding circuit that encodes, by using the timing signal generated by the timing generator, a transmission data which is synchronized to the reference clock to be the transmission line code; and a waveform shaping unit that performs a waveform shaping of a waveform at the predetermined is transition timing of the transmission data to be based on the reference clock.

Abstract translation: 发送和接收在通信系统中使用的数据的收发器，其中数据由传输线码编码，并且传输码的信号电平在比特持续时间内在预定的转换定时改变。 收发器包括：产生用于内部电路的内部时钟的时钟发生器; 定时发生器，其通过使用由时钟发生器产生的内部时钟产生与外部提供的参考时钟同步的定时信号; 编码电路，通过使用由定时发生器产生的定时信号，将与基准时钟同步的发送数据编码为传输线路码; 以及在预定的波形整形处理波形的波形整形单元是基于参考时钟的发送数据的转换定时。

公开(公告)号：US20250106098A1

公开(公告)日：2025-03-27

申请号：US18894483

申请日：2024-09-24

Applicant: DENSO CORPORATION

Inventor： Manahiro MORITA ,  Tomohisa KISHIGAMI ,  Taku INAGAWA

IPC: H04L41/0686 ,  G07C5/08 ,  H04L12/40 ,  H04L12/407 ,  H04L41/0681

Abstract: A communication system includes a plurality of communication nodes that relay fault diagnosis communication of a diagnosis request and q diagnosis result between a request source and a request destination of the fault diagnosis. A communication setting unit of one of the communication nodes increases a priority of a priority parameter indicating the priority of communication when a communication determination unit determines that the present communication is the fault diagnosis communication either when transmitting the diagnosis request or when transmitting the diagnosis result.

公开(公告)号：US20250087986A1

公开(公告)日：2025-03-13

申请号：US18830642

申请日：2024-09-11

Applicant: DENSO CORPORATION

Inventor： Ryota KAMEOKA ,  Tomohisa KISHIGAMI ,  Tomoya TOKUNAGA ,  Akira TADA ,  Yoji HOMMA

IPC: H02H1/00 ,  B60R16/033 ,  H02H7/20 ,  H04L67/12

Abstract: A communication system includes: a first control device receiving electric power supply from a power source via an electronic fuse; a second control device connected to the first control device for data communication; and a management device connected to the first and second control devices for data communication and controlling the electronic fuse. The management device performs at least one of: transmitting power source pre-cutoff notification information to the second control device notifying that the electric power supply will be cut off before turning off the electronic fuse; and transmitting power source post-cutoff notification information notifying that the electric power supply has been cut off after turning off the electronic fuse.

公开(公告)号：US20190158143A1

公开(公告)日：2019-05-23

申请号：US16252793

申请日：2019-01-21

Applicant: DENSO CORPORATION

Inventor： Takuya HONDA ,  Hirofumi ISOMURA ,  Tomohisa KISHIGAMI

IPC: H04B3/42 ,  H03K5/1252

CPC classification number: H04B3/42 ,  H03K5/1252 ,  H03K17/687 ,  H03K19/0175 ,  H03K19/0185 ,  H04B3/30 ,  H04L25/02

Abstract: A ringing suppression circuit is provided at a node having a communication circuit executing communication with another node by transmitting a differential signal through a pair of communication lines. The ringing suppression circuit includes: a suppressor configured to perform a suppression operation to suppress ringing occurred with a transmission of the differential signal by connecting a resistive component between the pair of communication lines; and a reference potential provider configured to provide a reference potential, which corresponds to a midpoint potential of the pair of communication lines during a steady state, to an intermediate point of the resistive component.

公开(公告)号：US20180205572A1

公开(公告)日：2018-07-19

申请号：US15744103

申请日：2016-06-13

Applicant: DENSO CORPORATION

Inventor： Tomohisa KISHIGAMI ,  Shigeki OHTSUKA ,  Nobuaki MATSUDAIRA ,  Hironobu AKITA

IPC: H04L12/40

CPC classification number: H04L12/40169 ,  H04L25/02 ,  H04L25/0272 ,  H04L25/03 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: A communication system includes a transmission path and multiple nodes. At least one of the multiple nodes includes a second communication portion and a control portion in addition to a first communication portion. When the control portion performs a high speed communication, the control portion shifts the first communication portion included in each of the remaining multiple nodes to a sleep mode. The second communication portion performs a differential communication at a higher speed than the first communication portion using a differential signal. In the differential signal, a maximum of a potential difference between the pair of communication lines is equal to or less than a recessive threshold value, and a minimum of the potential difference between the pair of communication lines is a negative voltage value that has a polarity opposite to the recessive threshold value of the first communication portion.

公开(公告)号：US20180041240A1

公开(公告)日：2018-02-08

申请号：US15663888

申请日：2017-07-31

Applicant: DENSO CORPORATION

Inventor： Naoya TSUCHIYA ,  Tomohisa KISHIGAMI

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H04L25/0272

Abstract: A differential communication circuit includes: a first switch in between a signal line and a power source, a second switch in between a signal line and a ground, a third switch in between the signal line and the ground, a fourth switch in between the signal line and the power source, first and second drivers respectively driving the first and second switches, and third and fourth drivers respectively driving the third and fourth switches OFF to ON at an ON to OFF timing of the first and second switches, for setting an ON period of the third and fourth switches to be shorter than a one-bit width in a communication signal and enabling a stable signal level determination while reducing power consumption of the differential communication circuit.