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公开(公告)号：US10038459B2
公开(公告)日：2018-07-31
申请号：US15098439
申请日：2016-04-14
发明人： Hiroyuki Mori , Youhei Sekiya , Yoshifumi Kaku , Shogo Akasaki
CPC分类号： H04B1/04 , G06F1/3203 , H04L12/10 , H04L27/12 , H04W52/0216 , H04W52/0219 , H04W52/0229 , Y02D70/00
摘要： A network control device includes a communicator performing communications via a transmission line at a preset transmission speed in a wake-up mode, a low frequency attenuator attenuating a low frequency component in a transmission signal having a low transmission speed that is lower than the preset transmission speed at a position between the transmission line and the communicator to receive and transmit the transmission signal to and from the communicator, and a wake-up controller receiving and transmitting a wake-up signal for transitioning from a sleep mode to the wake-up mode, at a transmission line side position of the low frequency attenuator, where the wake-up signal at a low frequency band is subject to attenuation by the low frequency attenuator, for a selective wake-up of a network node via the transmission line for network communications.
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公开(公告)号：US09930615B2
公开(公告)日：2018-03-27
申请号：US15235324
申请日：2016-08-12
发明人： Youhei Sekiya , Hiroyuki Mori , Yoshifumi Kaku , Shogo Akasaki
CPC分类号： H04W52/0206 , H04B3/36 , H04W52/0229 , Y02D70/00
摘要： A relay device includes a communication signal relay unit for relaying a communication signal and a wake-up signal relay unit for relaying, by bypassing the communication signal relay unit, a wake-up signal that is transmitted using a frequency band which is lower than a communication frequency band used in transmitting the communication signal. The communication signal relay unit includes a low frequency wave attenuation unit for attenuating a signal with a frequency band lower than the communication frequency band. The wake-up signal relay unit includes a wake-up signal filter unit for passing through a signal with a frequency band lower than the communication frequency band.
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公开(公告)号：US09413566B2
公开(公告)日：2016-08-09
申请号：US14812447
申请日：2015-07-29
发明人： Hiroyuki Mori , Keiji Shigeoka , Yoshifumi Kaku , Shogo Akasaki
CPC分类号： H04L25/0278 , H04L25/029 , H04L25/0292
摘要： A signal transmission circuit includes a transceiver, an impedance adjustment circuit, a first control circuit and a second control circuit. The impedance adjustment circuit realizes a low impedance state and a normal state of the transmission line. The first control circuit controls the impedance adjustment circuit to realize the low impedance state for a fixed period that is shorter than a width of one bit, when a change of a signal level on the transmission line is detected. The second control circuit controls the impedance adjustment circuit according to a transmission data transmitted from the transceiver, when detecting that a communication frame wins an arbitration by comparing the transmission data and the received data, to realize the low impedance state in an entire period where the signal level on the transmission line is recessive until transmission of the communication frame ends.
摘要翻译： 信号传输电路包括收发器，阻抗调节电路，第一控制电路和第二控制电路。 阻抗调整电路实现传输线的低阻抗状态和正常状态。 当检测到传输线上的信号电平的变化时，第一控制电路控制阻抗调节电路实现比一个位的宽度短的固定周期的低阻抗状态。 第二控制电路根据从收发器发送的发送数据来控制阻抗调整电路，当检测到通信帧通过比较发送数据和接收到的数据而获得仲裁时，在整个周期内实现低阻抗状态 传输线上的信号电平是隐性的，直到通信帧的传输结束为止。
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公开(公告)号：US11283713B2
公开(公告)日：2022-03-22
申请号：US16809642
申请日：2020-03-05
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku , Taichi Itagawa
摘要： A relay device for relaying a frame between communication lines includes: a classification acquisition unit for acquiring at least one classification item group having classification items and representing a classification condition for classifying a received frame to perform a predetermined process; a condition generation unit for generating at least one condition item group having condition items and representing a filtering rule for the frame based on the classification item group; and an execution unit for performing the process on the received frame based on the filtering rule. The classification acquisition unit acquires the classification item group in which a numerical number of the classification items is less than a numerical number of the condition items.
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公开(公告)号：US11252104B2
公开(公告)日：2022-02-15
申请号：US16802811
申请日：2020-02-27
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku , Taichi Itagawa , Yasuhiro Kotani , Kazuya Ohata
IPC分类号： H04L12/935 , H04L29/06
摘要： A relay apparatus relays a frame by connection type communication in which the frame is transmitted and received between communication devices, and includes: communication ports each of which is connected to one of the communication devices; a determiner that receives a reception frame from a communication port among the communication ports, the communication port being connected to a communication device as a frame transmission source among the communication devices, and performs determination of the reception frame by referring a header portion of the reception frame; a rewriter that generates a transmission frame obtained by rewriting the header portion of the reception frame in accordance with a predetermined condition; and a transmitter that transmits the transmission frame from a communication port connected to a communication device as transmission destination among the communication ports.
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公开(公告)号：US11184297B2
公开(公告)日：2021-11-23
申请号：US16800252
申请日：2020-02-25
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku , Taichi Itagawa
IPC分类号： H04L12/861 , H04L12/823 , H04L12/935
摘要： A relay device includes: multiple ports for transmitting and receiving a frame; at least one queue arranged for each of the ports, storing a transmission scheduled frame, and having a variable storage capacity; and a capacity controller controlling the storage capacity of each of queues for the ports. A distribution pattern of a value of the storage capacity allocated to each of the queues is defined as a capacity distribution pattern. The capacity distribution pattern includes a first pattern which is the capacity distribution pattern in an initial state and a second pattern which is different from the first pattern. The capacity controller switches the capacity distribution pattern from the first pattern to the second pattern when a predetermined switching condition is satisfied.
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公开(公告)号：US11171871B2
公开(公告)日：2021-11-09
申请号：US16665172
申请日：2019-10-28
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku , Taichi Itagawa
IPC分类号： H04L12/28 , H04L12/801 , H04L29/06 , H04L29/12
摘要： A relay apparatus executes either (i) transmitting a received frame, which is received from a communication line, to a different communication line or (ii) discarding the received frame as a discarded frame, according to a preset filtering rule. The relay apparatus stores discard information indicating information on the discarded frame in a preset discard recording storage when discarding the received frame as the discarded frame.
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公开(公告)号：US10454528B2
公开(公告)日：2019-10-22
申请号：US15820495
申请日：2017-11-22
申请人： SOKEN, INC. , DENSO CORPORATION
发明人： Youhei Sekiya , Hiroyuki Mori , Yoshifumi Kaku , Hironobu Akita
IPC分类号： H04B3/36 , H04B3/23 , H04B7/185 , B60R16/023
摘要： A relay device for data between communication cables having a signal line in full duplex communication, includes: communication units connected to the communication cables; and a main controller executing a relay process of the data. Each communication unit includes: an input/output unit of an analog signal; an analog/digital converter converting the analog signal into a digital signal; a generator generating another digital signal based on another analog signal input to another communication unit; and an echo canceller calculating a filter coefficient based on the other digital signal and the digital signal, and executing a cancellation process of removing a component derived from the other digital signal from the digital signal according to the filter coefficient. The communication unit or the main control unit includes a sign determination unit determining based on a time change of the filter coefficient whether a sign of disconnection exists in the signal line.
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公开(公告)号：US11424957B2
公开(公告)日：2022-08-23
申请号：US16800460
申请日：2020-02-25
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku
IPC分类号： H04L12/437 , H04L41/0654 , H04B7/14 , H04L43/0823 , H04L43/0811 , H04L41/0686
摘要： A relay device, connected to another relay device by a communication line, includes: multiple ports having two redundant ports connected to communication lines for providing redundant transfer paths between relay devices; a disruption determination unit determining whether a frame transmitted from a target relay device and received through one of the redundant ports is disrupted; an abnormality transmitter transmitting an abnormality detection frame to the target relay device when the frame is disrupted; a response receiver determining whether a response frame is received from the target relay device after the abnormality transmitter transmits the abnormality detection frame; and an abnormality determination unit determining that an abnormality occurs in one of the communication lines between the target relay device and the relay device when the response frame is not received.
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公开(公告)号：US11336484B2
公开(公告)日：2022-05-17
申请号：US16774509
申请日：2020-01-28
申请人： DENSO CORPORATION
发明人： Yoshifumi Kaku
IPC分类号： H04L12/437 , H04B7/155 , H04L41/0654 , H04L43/0823 , H04L12/40 , H04L12/64 , H04L49/552
摘要： A relay device is one of relay devices each including (i) a common port connected to a terminal and (ii) two ring ports connected to other relay devices via communication lines. Upon receiving via the common port a frame whose destination is a terminal connected to a different relay device under one of the communication lines being abnormal, the relay device transmits the frame via both (i) one of the ring ports bypassing the abnormal communication line and (ii) a communication bus. In contrast, upon receiving a frame, whose destination is a terminal connected with the relay device, via one of the ring ports and a frame, whose destination is the terminal connected with the relay device, via the communication bus, the relay device determines whether the frames match. If the frames match, the relay device transfers the matched frame to the terminal via the common port.
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