公开(公告)号：US10223319B2

公开(公告)日：2019-03-05

申请号：US13949490

申请日：2013-07-24

Applicant: DENSO CORPORATION

Inventor： Tetsuo Nakagawa ,  Tomohisa Kishigami

IPC: G06F11/34 ,  G06F13/42 ,  H04L12/64

Abstract: A communication load determining apparatus is used for a communication system which includes a plurality of communication devices performing communication via a common bus. The communication system operates in accordance with a communication protocol that defines which a priority order is set to each of the frames transmitted from the communication devices and which a frame having a lower priority has a longer transmission latency before being transmitted to the bus. In the communication load determining apparatus, a low-priority frame having a lower priority than other frames to the bus is transmitted, and a transmission latency of the low-priority frame is measured. The communication load determining apparatus determines whether or not abnormality has occurred in a communication load in the bus on the basis of the measured transmission latency to produce a determination result. The produced determination result is stored.

公开(公告)号：US20140047146A1

公开(公告)日：2014-02-13

申请号：US13949490

申请日：2013-07-24

Applicant: DENSO CORPORATION

Inventor： Tetsuo Nakagawa ,  Tomohisa Kishigami

IPC: G06F13/42

CPC classification number: G06F13/42 ,  G06F11/3419 ,  G06F11/3495 ,  H04L12/6418

Abstract: A communication load determining apparatus is used for a communication system which includes a plurality of communication devices performing communication via a common bus. The communication system operates in accordance with a communication protocol that defines which a priority order is set to each of the frames transmitted from the communication devices and which a frame having a lower priority has a longer transmission latency before being transmitted to the bus. In the communication load determining apparatus, a low-priority frame having a lower priority than other frames to the bus is transmitted, and a transmission latency of the low-priority frame is measured. The communication load determining apparatus determines whether or not abnormality has occurred in a communication load in the bus on the basis of the measured transmission latency to produce a determination result. The produced determination result is stored.

Abstract translation: 通信负载确定装置用于包括通过公共总线执行通信的多个通信装置的通信系统。 通信系统根据通信协议进行操作，该通信协议定义哪个优先顺序被设置为从通信设备发送的每个帧，以及具有较低优先级的帧在发送到总线之前具有更长的传输等待时间。 在通信负载确定装置中，发送具有比其他帧低于总线的优先级低的低优先级帧，并且测量低优先级帧的传输等待时间。 通信负载确定装置基于所测量的传输等待时间来确定总线中的通信负载中是否发生异常以产生确定结果。 产生的确定结果被存储。

公开(公告)号：US09800319B2

公开(公告)日：2017-10-24

申请号：US14821879

申请日：2015-08-10

Applicant: DENSO CORPORATION

Inventor： Tetsuo Nakagawa ,  Tomohisa Kishigami

IPC: H04L12/28 ,  H04B7/155 ,  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.