Method and device for resetting at least one processing device

Patent metadata

Field	Value
Publication number	US-10873472-B2
Application number	US-201816213168-A
Country	US
Kind code	B2
Filing date	Dec 7, 2018
Priority date	Dec 21, 2017
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

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.

First claim

The invention claimed is:

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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

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.

10. 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.

11. 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.

12. 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.

13. 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.

14. 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.

15. 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.

16. 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.

17. 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 .

Assignees

• Canon Kk

Inventors

• Lagrange Pascal
• Merlet Hervé

Classifications

• H04N23/65

  Control of camera operation in relation to power supply · CPC title

• H04N23/661

  Transmitting camera control signals through networks, e.g. control via the Internet · CPC title

• G06F1/24 Primary

  Resetting means · CPC title

• H04L12/10

  Current supply arrangements · CPC title

• G06F11/1441

  Resetting or repowering · CPC title