System and method for bottom-up invocation of control signal repeaters in a mesh lighting network

• US 10,182,357 B1
• Filed: 09/20/2017
• Issued: 01/15/2019
• Est. Priority Date: 09/20/2017
• Status: Active Grant

• Current Assignee: Echelon Corporation (Renesas Electronics Corporation)
• Original Assignee: Echelon Corporation (Renesas Electronics Corporation)
• Inventors: Keating, Mark, Dholakia, Jwalant, Lloyd, Jonathan
• Primary Examiner(s): Trinh, Tan H
• Application Number:
  US15/709,935
• Time in Patent Office: 482 Days
• Field of Search: 455 7, 455 131, 455 24, 455 411, 455 412, 455420, 455423, 4554522, 455436, 455 134, 455513, 455 6711, 4551151, 370 18, 370338, 370431, 370254, 370315, 370350, 315151, 315131, 315291, 315312, 700295, 700275, 709220, 340870, 701491
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

Example embodiments of the invention efficiently organize, control and prioritize a distributed lighting network. A mesh lighting network is organized from the bottom up into groups of lighting devices with control signal repeaters fanning out control signals to each group. Each lighting device is capable of forwarding control signals to additional lighting devices. During build-out of the mesh network, as new lighting devices are installed, the control network automatically selects a device whose repeater function will provide the most reliable and efficient distribution of control signals to the new group of devices being installed.

Claims

1. A system for organizing lighting nodes in a lighting network, comprising:

a central management system coupled to a wireless network, the central management system configured to organize and control a large array of lighting nodes;

at least one lighting node in the wireless network, configured to receive a discovery message from another lighting node in the wireless network, and in response thereto, to transmit to the central management system, a request message including information from the discovery message and a request to invoke a repeater function in the at least one lighting node, for forwarding messages from the other lighting node to the central management system;

the central management system configured to receive the request message from the at least one lighting node, to validate the information from the discovery message of the other lighting node, to determine a best path for communication of messages between the other lighting node and the central management system based on the information from the discovery message, and to cause a command to be transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node; and

a repeater approval timer in the central management system, configured to prevent other lighting nodes in the wireless network, from respectively invoking a repeater function in the respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node.

2. The system of claim 1, further comprising:

one or more gateways in the wireless network, coupled to the central management system, configured to exchange wireless messages with lighting nodes within wireless communications range in the wireless network;

wherein the other lighting node in the wireless network is out of the wireless communications range of the one or more gateways, and is within wireless communications range of the at least one lighting node.

3. The system of claim 1, wherein the validation of the information from the discovery message of the other lighting node, includes identification of the other lighting node in a whitelist and determination that the discovery message from the other lighting node has a link quality indication greater than or equal to a threshold value.

4. The system of claim 1, wherein the central management system is configured to receive two or more request messages from two or more lighting nodes, the two or more request messages requesting invoking a respective repeater function in the two or more lighting nodes, the two or more request messages derived from two or more respective discovery messages from the same other lighting node;

the central management system configured to validate information from the two or more discovery messages, the information having been included in respective ones of the two or more request messages, to select one of the two or more lighting nodes based on the validation, and to cause a command to be transmitted to the selected lighting node to invoke the repeater function in the selected lighting node; and

the repeater approval timer in the central management system, configured to prevent other lighting nodes in the wireless network, from respectively invoking a repeater function in respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the selected lighting node to invoke the repeater function in the selected lighting node.

5. The system of claim 4, wherein the validation of the information from the two or more discovery messages, the information having been included in respective ones of the two or more request messages, includes respective identification of the two or more lighting nodes in a whitelist and determination that the link quality indication corresponding to the selected lighting node is greater than the link quality indication of others of the two or more lighting nodes.

6. The system of claim 4, wherein at least one of received link quality indication of the discovery message, propagation delay of the discovery message, respective service group ID of the two or more lighting nodes, respective functional group ID of the two or more lighting nodes, respective processor size of the two or more lighting nodes, respective storage size of the two or more lighting nodes, and relative priority of network traffic of a lighting group of which the other lighting node is a member, is information used by central management system to determine the best path for maximizing reliability or speed of communication between the other lighting node and the central management system.

7. The system of claim 1, wherein the repeater approval timer in the central management system starts the delay interval each time a command is transmitted to another lighting node to invoke the repeater function in the another lighting node, thereby preventing creation of an excess number of repeater nodes.

8. The system of claim 1, wherein the repeater approval timer provides at least one of variable delay intervals for invoking the repeater function in lighting nodes of at least one individual group of lighting nodes or different delay intervals for invoking the repeater function in lighting nodes of different ones of a plurality of groups of lighting nodes.

9. The system of claim 1, further comprising:

rebalancing repeater traffic, by the central management system, when a new commissioned node repeater is created with a better link quality indication, greater than an existing commissioned node repeater'"'"'s link quality indication; and

sending, by the central management system, a command to the existing commissioned node repeater to turn off its repeater function, to improve network traffic from another node through the new commissioned node repeater, has a better link quality indication connection to the central management system.

10. A central management system for organizing lighting nodes in a lighting network, comprising:

a communications unit in the central management system, coupled to a wireless network, configured to communicate with a large array of lighting nodes in the wireless network;

the central management system configured to receive a request message from at least one lighting node including information from a discovery message of an initiating lighting node and a request to invoke a repeater function in the at least one lighting node, for forwarding messages from the initiating lighting node to the central management system;

the central management system configured to receive the request message from the at least one lighting node, to validate the information from the discovery message of the initiating lighting node, to determine a best path for communication of messages between the initiating lighting node and the central management system based on the information from the discovery message, and to cause a command to be transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node; and

a repeater approval timer in the central management system, configured to prevent other lighting nodes in the wireless network, from respectively invoking a repeater function in the respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node.

11. The central management system of claim 10, further comprising:

one or more gateways in the wireless network, coupled to the central management system, configured to exchange wireless messages with lighting nodes within wireless communications range in the wireless network;

wherein the other lighting node in the wireless network is out of the wireless communications range of the one or more gateways, and is within wireless communications range of the at least one lighting node.

12. The central management system of claim 10, wherein the validation of the information from the discovery message of the other lighting node, includes identification of the other lighting node in a whitelist and determination that the discovery message from the other lighting node has a link quality indication greater than or equal to a threshold value.

13. The central management system of claim 10, further comprising:

wherein the central management system is configured to receive two or more request messages from two or more lighting nodes, the two or more request messages requesting invoking a respective repeater function in the two or more lighting nodes, the two or more request messages derived from two or more respective discovery messages from the same other lighting node;

the central management system configured to validate information from the two or more discovery messages, the information having been included in respective ones of the two or more request messages, to select one of the two or more lighting nodes based on the validation, and to cause a command to be transmitted to the selected lighting node to invoke the repeater function in the selected lighting node; and

the repeater approval timer in the central management system, configured to prevent other lighting nodes in the wireless network, from respectively invoking a repeater function in respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the selected lighting node to invoke the repeater function in the selected lighting node.

14. The central management system of claim 13, wherein the validation of the information from the two or more discovery messages, the information having been included in respective ones of the two or more request messages, includes respective identification of the two or more lighting nodes in a whitelist and determination that the link quality indication corresponding to the selected lighting node is greater than the link quality indication of others of the two or more lighting nodes.

15. The central management system of claim 13, wherein at least one of received link quality indication of the discovery message, propagation delay of the discovery message, respective service group ID of the two or more lighting nodes, respective functional group ID of the two or more lighting nodes, respective processor size of the two or more lighting nodes, respective storage size of the two or more lighting nodes, and relative priority of network traffic of a lighting group of which the other lighting node is a member, is information used by central management system to determine the best path for maximizing reliability or speed of communication between the other lighting node and the central management system.

16. The central management system of claim 10, wherein the repeater approval timer in the central management system starts the delay interval each time a command is transmitted to another lighting node to invoke the repeater function in the another lighting node, thereby preventing creation of an excess number of repeater nodes in the wireless network.

17. The central management system of claim 10, further comprising:

rebalancing repeater traffic, by the central management system, when a new commissioned node repeater is created with a better link quality indication, greater than an existing commissioned node repeater'"'"'s link quality indication; and

sending, by the central management system, a command to the existing commissioned node repeater to turn off its repeater function, to improve network traffic from another node through the new commissioned node repeater, has a better link quality indication connection to the central management system.

18. The central management system of claim 10, wherein the repeater approval timer provides at least one of variable delay intervals for invoking the repeater function in lighting nodes of at least one individual group of lighting nodes or different delay intervals for invoking the repeater function in lighting nodes of different ones of a plurality of groups of lighting nodes.

19. A method for operating a central management system for organizing lighting nodes in a lighting network, comprising:

communicate with a large array of lighting nodes in the wireless network;

receive a request message from at least one lighting node including information from a discovery message of an initiating lighting node and a request to invoke a repeater function in the at least one lighting node, for forwarding messages from the initiating lighting node to the central management system;

validate the information from the discovery message of the initiating lighting node, to determine a best path for communication of messages between the initiating lighting node and the central management system based on the information from the discovery message, and to cause a command to be transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node; and

prevent other lighting nodes in the wireless network from respectively invoking a repeater function in the respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the at least one lighting node to invoke the repeater function in the at least one lighting node.

20. The method for operating a central management system of claim 19, further comprising:

wherein the central management system is configured to receive two or more request messages from two or more lighting nodes, the two or more request messages requesting invoking a respective repeater function in the two or more lighting nodes, the two or more request messages derived from two or more respective discovery messages from the same other lighting node;

validate information from the two or more discovery messages, the information having been included in respective ones of the two or more request messages, to select one of the two or more lighting nodes based on the validation, and to cause a command to be transmitted to the selected lighting node to invoke the repeater function in the selected lighting node; and

prevent other lighting nodes in the wireless network, from respectively invoking a repeater function in respective other lighting nodes during a delay interval that the central management system starts when the command is transmitted to the selected lighting node to invoke the repeater function in the selected lighting node.

21. The method for operating a central management system of claim 19, wherein the repeater approval timer in the central management system starts the delay interval each time a command is transmitted to another lighting node to invoke the repeater function in the another lighting node, thereby preventing creation of an excess number of repeaters in the wireless network.