# US 10,873,472 B2 · Method and device for resetting at least one processing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,472 B2 - Document ID: US10873472B2 - Status: Granted - Kind: B2 - Application number: 16/213,168 - Filed: 2018-12-07 - Published: 2019-06-27 - Granted: 2020-12-22 - Earliest claimed: 2017-12-21 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Pascal Lagrange; Hervé Merlet - Web page: https://patentgrep.com/patent/US10873472B2 ## CPC - H04L 12/12: Arrangements for remote connection or disconnection of substations or of equipment thereof - G06F 1/24: Resetting means - H04L 12/10: Current supply arrangements - H04N 7/181: {for receiving images from a plurality of remote sources} - H04N 17/002: {for television cameras} - H04N 23/65: Control of camera operation in relation to power supply - H04N 5/268: Signal distribution or switching - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method for resetting at least one processing device in a power-over-data linear bus interconnecting a plurality of processing devices, the method including, at a first processing device of said plurality of processing devices: sending a protocol data unit comprising a prior-reset notification to all other processing devices of the plurality of processing devices, and sending a physical reset signal to all other processing devices of the plurality of processing devices, wherein the prior-reset notification is configured to prevent a processing device that receives the physical reset signal from resetting, if the protocol data unit comprising the prior-reset notification has been previously processed by the processing device. ## Claims ### Claim 1 A method for resetting at least one processing device in a power-over-data linear bus interconnecting a plurality of processing devices, each processing device among the plurality of processing devices being connected to a same switch port, the method comprising, at a first processing device of said plurality of processing devices: sending a protocol data unit comprising a prior-reset notification to all other processing devices of the plurality of processing devices, and sending a physical reset signal to all other processing devices of the plurality of processing devices, wherein the prior-reset notification is configured to prevent a processing device that receives the physical reset signal from resetting, if the protocol data unit comprising the prior-reset notification has been previously processed by the processing device that received the physical reset signal. ### Claim 2 (depends on 1) The method for resetting at least one processing device according to claim 1, comprising checking a status of each of the processing devices of the plurality of processing devices, the status being either a normally functioning status or a faulty status, and when at least a processing device is verified as having faulty status, selecting the first processing device. ### Claim 3 (depends on 2) The method for resetting at least one processing device according to claim 2, wherein the first processing device is selected from among the processing devices that are directly connected to one processing device verified as having a faulty status. ### Claim 4 (depends on 2) The method for resetting at least one processing device according to claim 2, wherein the first processing device is selected as being the closest processing device connected to one processing device verified as having a faulty status. ### Claim 5 (depends on 1) The method for resetting at least one processing device according to claim 1, further comprising the first processing device receiving from a central controlling device a request to send said protocol data unit comprising a prior-reset notification. ### Claim 6 (depends on 1) The method for resetting at least one processing device according to claim 1, wherein said protocol data unit comprises a Medium Access Control (MAC) level reset notification. ### Claim 7 (depends on 1) The method for resetting at least one processing device according to claim 1, wherein, for a processing device that has processed said protocol data unit, the method comprises deactivating a local reset circuit on receiving a physical reset signal. ### Claim 8 (depends on 1) The method for resetting at least one processing device according to claim 1, wherein, for a processing device that has processed said protocol data unit, the method comprises activating a capacitive circuit on receiving a physical reset signal. ### Claim 9 A system comprising a plurality of processing devices interconnected by a power-over-data linear bus, each processing device among the plurality of processing devices being connected to a same switch port, wherein a first processing device of said plurality of processing devices is configured for: sending a protocol data unit comprising a prior-reset notification to all other processing devices of the plurality of processing devices, and sending a physical reset signal to all other processing devices of the plurality of processing devices, wherein the prior-reset notification is configured to prevent a processing device that receives the physical reset signal from resetting, if the protocol data unit comprising the prior-reset notification has been previously processed by the processing device that received the physical reset signal. ### Claim 10 (depends on 9) The system according to claim 9, comprising a second processing device configured for checking a status of each of the processing devices of the plurality of processing devices, the status being either a normally functioning status or a faulty status, and a third processing device configured for selecting the first processing device, when at least a processing device is verified as having faulty status, wherein the second device is the first processing device or a processing device among the plurality of processing devices distinct from the first processing, wherein the third device is the first processing device, the second processing device, or a processing device among the plurality of processing devices distinct from both the first processing device and the second processing device. ### Claim 11 (depends on 10) The system according to claim 10, wherein the third device is configured for selecting the first processing devices from among the processing devices that are directly connected to one processing device verified as having a faulty status. ### Claim 12 (depends on 10) The system according to claim 10, wherein the third device is configured for selecting the first processing device as being the closest processing device connected to one processing device verified as having a faulty status. ### Claim 13 (depends on 9) The system according to claim 9, wherein the first processing device is further configured for receiving, from a central controlling device, a request to send said protocol data unit comprising a prior-reset notification. ### Claim 14 (depends on 9) The system according to claim 9, wherein a processing device that has been processed said protocol data unit is configured for deactivating a local reset circuit on receiving a physical reset signal. ### Claim 15 (depends on 9) The system according to claim 9, wherein a processing device that has been processed said protocol data unit is configured for activating a capacitive circuit on receiving a physical reset signal. ### Claim 16 (depends on 9) The system according to claim 9, wherein said first processing device is one of a Power sourcing equipment (PSE), a video monitoring system (VMS), a camera device and adapter device. ### Claim 17 (depends on 1) A non-transitory computer-readable storage medium storing instructions of a computer program for implementing a method for resetting at least a processing device according to claim 1.