公开(公告)号：US20210021441A1

公开(公告)日：2021-01-21

申请号：US16930774

申请日：2020-07-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yoshikazu NISHIKAWA

IPC: H04L12/40 ,  B60W50/00

Abstract: A communication apparatus installed on a vehicle as a master apparatus includes: a slave port communicating with an on-vehicle control apparatus; two or more master ports are paired with two or more slave apparatuses installed on the vehicle, and communicate with the two or more slave apparatuses using different channels based on Distributed System Interface (DSI) protocol; two or more buffer memories provided corresponding to the two or more master ports; and a control section sorting and storing commands addressed to the two or more slave apparatuses, respectively, from the on-vehicle control apparatus into the two or more buffer memories, respectively, and when receiving a trigger instructing transmission of the commands from the on-vehicle control apparatus, reading the commands from the two or more buffer memories, and simultaneously transmitting the commands from the two or more master ports, respectively.

公开(公告)号：US20200290633A1

公开(公告)日：2020-09-17

申请号：US16815929

申请日：2020-03-11

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yoshikazu NISHIKAWA ,  Yoshinao KAWAI

IPC: B60W50/04 ,  H04L12/40

Abstract: The master apparatus includes a communicator that transmits a command to the one or more slave apparatuses in the first communication method, and that transmits a trigger to the one or more slave apparatuses and receives data that is transmitted by the one or more slave apparatuses in response to the trigger in the second communication method, and a controller that controls the communicator during execution of the first communication method to read negotiation information that indicates conditions for the second communication method from a memory and to transmit the negotiation information to the one or more slave apparatuses, wherein upon completion of communication that satisfies the conditions after the first communication method is switched to the second communication method, the controller performs switching from the second communication method to the first communication method.