# US 2021/0243049 A1 · Gateway device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243049 A1 - Document ID: US20210243049A1 - Status: Published application - Kind: A1 - Application number: 17/049,092 - Filed: 2019-02-15 - Published: 2021-08-05 - Earliest claimed: 2018-04-23 - Assignees: Hitachi Automotive Systems, Ltd. - Applicants: Hitachi Automotive Systems, Ltd. - Inventors: Mitsunori KUWATA - Web page: https://patentgrep.com/patent/US20210243049A1 ## CPC - H04L 45/28: using route fault recovery - H04L 12/40013: {Details regarding a bus controller} - H04L 12/40039: {Details regarding the setting of the power status of a node according to activity on the bus} - H04L 12/40078: {Bus configuration (home automation networks H04L12/2803; arrangements for maintenance or administration H04L41/00)} - H04L 12/40097: {Interconnection with other networks (LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462)} - H04L 12/40143: {involving priority mechanisms (hybrid switching fabrics H04L12/6402; intermediate storage or scheduling H04L49/90; time-division multiplex systems H04J3/00)} - H04L 12/40189: {by using a plurality of bus systems} - H04L 12/66: Arrangements for connecting between networks having differing types of switching systems, e.g. gateways - H04W 4/24: Accounting or billing - H04L 12/12: Arrangements for remote connection or disconnection of substations or of equipment thereof - H04L 12/46: Interconnection of networks - H04L 2012/40215: {Controller Area Network CAN} - H04L 2012/40273: {the transportation system being a vehicle} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract To provide a gateway device capable of continuing communication in the event of an abnormality without a redundant configuration as a system. A gateway device 100 includes a plurality of transceivers 110, 112, and 114 connected to a plurality of communication buses 1, 2, and 3 in a one-to-one manner, and a switch element 50 that connects the two communication buses 1 and 2 having different priorities among the plurality of communication buses. ## Claims ### Claim 1 A gateway device, comprising: a plurality of transceivers that are connected to a plurality of communication buses in a one-to-one manner; and at least one switch element that connects two communication buses having different priorities among the plurality of communication buses. ### Claim 2 (depends on 1) The gateway device of claim 1, wherein the plurality of communication buses include a first communication bus to which a first control device is connected and a second communication bus to which a second control device is connected, wherein the first communication bus has a higher priority than the second communication bus, wherein the plurality of transceivers include a first transceiver connected to the first communication bus and a second transceiver connected to the second communication bus, and wherein the at least one switch element is a switch element that connects the first communication bus and the second communication bus. ### Claim 3 (depends on 2) The gateway device of claim 2, wherein, when a failure occurs in the first transceiver, the first transceiver is disconnected from the network formed by the first communication bus, and the switch element is set to an ON state to communicate with the first control device via the second transceiver. ### Claim 4 (depends on 2) The gateway device of claim 2, further comprising: a processing device that is connected to each of the plurality of transceivers, wherein, when a situation in which data cannot be received from the first transceiver has continued for a predetermined time or more, the processing device disconnects the first transceiver from the network formed by the first communication bus and sets the switch element to an ON state to communicate with the first control device via the second transceiver. ### Claim 5 (depends on 2) The gateway device of claim 2, further comprising: a processing device that is connected to each of the plurality of transceivers, wherein, when a situation in which data cannot be received from the first transceiver has continued for a predetermined time or more, the processing device sets the switch element to an ON state, outputs a sleep command to the first transceiver, and transmits data transmitted to the first transceiver to the second transceiver. ### Claim 6 (depends on 4) The gateway device of claim 4, wherein, when a situation in which data cannot be received from the first transceiver has continued for a predetermined time or more, the processing device determines that a failure has occurred in the first transceiver. ### Claim 7 (depends on 6) The gateway device according to claim 6, wherein the processing device outputs a notification signal for notifying an occupant that a failure has occurred in the first transceiver via a notification device. ### Claim 8 (depends on 4) The gateway device of claim 4, wherein, the processing device outputs a sleep command to the first transceiver when a first trigger signal is input via any one of the plurality of communication buses, and outputs a sleep release command to the first transceiver when a second trigger signal is input via any one of the plurality of communication buses when the first transceiver is in a sleep state. ### Claim 9 (depends on 2) The gateway device of claim 2, wherein the first control device is any one of power train ECUs including an engine control ECU, a brake control ECU, and a transmission control ECU. ### Claim 10 (depends on 1) The gateway device of claim 1, further comprising: a memory in which priorities of the plurality of communication buses are stored; and a processing device that is connected to each of the plurality of transceivers, wherein, when a situation in which data cannot be received from a first transceiver connected to a first bus included in the plurality of communication buses among the plurality of transceivers has continued for a predetermined time or more, the processing device disconnects the first transceiver from a network formed by the first bus, sets a switch element that connects the first transceiver and a second transceiver connected to a second bus having a priority lower than the first bus among the plurality of switch elements to an ON state, and executes communication with a control device connected to the first bus via the second transceiver. ### Claim 11 (depends on 1) The gateway device of claim 1, further comprising: a memory in which priorities of the plurality of communication buses are stored; and a processing device that is connected to each of the plurality of transceivers, wherein, when a situation in which data cannot be received from a first transceiver connected to a first bus included in the plurality of communication buses among the plurality of transceivers has continued for a predetermined time or more, a switch element that connects the first transceiver and a second transceiver connected to a second bus having a priority lower than the first bus among the plurality of switch elements is set to an ON state, the processing device outputs a sleep command to the first transceiver, and data transmitted to the first transceiver is transmitted to the second transceiver. ### Claim 12 (depends on 1) The gateway device of claim 1, further comprising: a memory in which priorities of the plurality of communication buses are stored, wherein, when the priority of the second communication bus is the lowest among the priorities of the plurality of communication buses, the plurality of switch elements respectively connect at least one of the plurality of communication buses excluding the second communication bus and the second communication bus.