System and methods for redundant networks

• US 20060079230A1
• Filed: 10/13/2004
• Published: 04/13/2006
• Est. Priority Date: 10/13/2004
• Status: Abandoned Application

• Current Assignee: Air Liquide Electronics US LP (Air Liquide SA)
• Original Assignee: Air Liquide Electronics US LP (Air Liquide SA)
• Inventors: Russell, Thomas C.
• Application Number:
  US10/964,414
• Publication Number:
  US 20060079230A1
• Time in Patent Office: Days
• US Class Current: 455/434
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Systems and methods for redundant data communication are presented. In some embodiments, a redundant wireless networking system includes at least two wireless access points directly associated with a wired network and configured to provide wireless network access over one or more common areas, and one or more transceivers whose locations are restricted within the common area(s). Some embodiments concern a system for providing data communications over a power line network, including a host associated with one or more power lines, where the host is configured to mange a self-configuring data communications network, and a plurality of client devices configured to communicate with the host over the power line(s) in an ad-hoc manner. Certain embodiments may have usage in industrial applications.

Claims

1. A system for providing redundant wireless networking, comprising:

at least two wireless access points, each of the at least two wireless access points being directly associated with a wired network and configured to provide wireless network access over at least one common area; and

at least one transceiver restricted to be located within the at least one common area, wherein the at least one transceiver is configured to select an individual wireless access point from the at least two wireless access points to establish a link to the wired network.

2. The system according to claim 1, wherein each of the at least two wireless access points has a unique fixed identifier.

3. The system according to claim 2, wherein the at least one transceiver is configured to sequentially scan the unique fixed identifiers.

4. The system according to claim 1, wherein the at least one transceiver is configured to select the individual wireless access point based upon at least one of greatest signal strength, greatest signal quality, and lowest bit-error rate.

5. The system according to claim 1, wherein the at least two wireless access points and the at least one transceiver are configured to communicate using an I.E.E.E. 801.11 wireless networking protocol.

6. The system according to claim 1, wherein the at least two wireless access points and the at least one transceiver are configured to communicate using a Bluetooth wireless networking protocol.

7. The system according to claim 1, wherein the wired network utilizes an Internet Protocol.

8. The system according to claim 1, further comprising industrial equipment associated with the at least one transceiver.

9. The system according to claim 8, wherein the industrial equipment is equipment associated with one of semiconductor fabrication, pharmaceutical manufacturing, automobile manufacturing, and food processing.

10. The system according to claim 8, wherein the industrial equipment comprises a pump.

11. The system according to claim 8, wherein the common area is an area of a semiconductor fabrication facility.

12. The system according to claim 2, further comprising:

a plurality of transceivers, wherein each of the transceivers is configured to perform load leveling by scanning the identifiers in a different numerical sequence and selecting a unique identifier based upon a condition.

13. The system according to claim 2, further comprising:

a plurality of transceivers, wherein each of the transceivers has a preferred unique identifier which is predetermined.

14. The system according to claim 1, wherein the system further comprises a controller associated with the wired network, wherein the controller manages the at least two access points.

15. The system according to claim 14, wherein the controller performs load leveling among the at least two wireless access points.

16. The system according to claim 15, wherein the at least two wireless access points are each assigned a unique identifier which is managed by the controller.

17. The system according to claim 1, wherein each of the at least two wireless access points performs load leveling.

18. The system according to claim 17, wherein each of the at least two wireless access points further comprises:

a memory containing instructions; and

a processor executing the instructions for;

providing information regarding a number of transceivers connected to other wireless access points;

determining whether another wireless access point is available for additional transceiver connections; and

rejecting requests for additional transceiver connections if a preset number of transceivers has been reached and if at least one other wireless access point is available for additional transceiver connections.

19. The system according to claim 18, wherein the at least two wireless access points are each assigned a unique identifier which is controlled by the processor.

20. A system for providing redundant wireless networking, comprising:

a plurality of server transceivers, each of the server transceivers being directly coupled to a wired network and providing independent access to the wired network using a unique wireless channel; and

at least one client transceiver having substantially continuous access to at least two of the unique wireless channels, the at least one client transceiver being configured to select one wireless channel from the at least two unique wireless channels.

21. The system according to claim 20, wherein the at least one client transceiver is configured to sequentially scan the unique wireless channels.

22. The system according to claim 20, wherein the at least one client transceiver is configured to select the one wireless channel based upon at least one of greatest signal strength, greatest signal quality, and lowest bit-error rate.

23. The system according to claim 20, wherein the plurality of server transceivers and the at least one client transceiver are configured to communicate using an I.E.E.E. 801.11 wireless networking protocol.

24. The system according to claim 20, wherein the plurality of server transceivers and the at least one client transceiver are configured to communicate using a Bluetooth wireless networking protocol.

25. The system according to claim 20, wherein the wired network utilizes an Internet Protocol.

26. The system according to claim 20, further comprising industrial equipment associated with the at least one client transceiver.

27. The system according to claim 26, wherein the industrial equipment is equipment associated with one of semiconductor fabrication, pharmaceutical manufacturing, automobile manufacturing, and food processing.

28. The system according to claim 26, wherein the industrial equipment comprises a pump.

29. The system according to claim 26, wherein the client transceiver is located in an area of a semiconductor fabrication facility.

30. The system according to claim 21, further comprising:

a plurality of client transceivers, wherein each of the client transceivers is configured to perform load leveling by scanning the channels in a different numerical sequence and selecting a unique channel based upon a condition.

31. The system according to claim 21, further comprising:

a plurality of client transceivers, wherein each of the client transceivers has a preferred unique channel which is predetermined.

32. The system according to claim 20, wherein the system further comprises a controller associated with the wired network, wherein the controller manages the plurality of server transceivers.

33. The system according to claim 32, wherein the controller performs load leveling among the plurality of server transceivers.

34. The system according to claim 33, wherein the plurality of server transceivers are each assigned a unique channel which is managed by the controller.

35. The system according to claim 20, wherein each of the plurality of server transceivers performs load leveling.

36. The system according to claim 35, wherein each of the plurality of server transceivers further comprises:

a memory containing instructions; and

a processor executing the instructions for;

providing information regarding a number of client transceivers connected to other server transceivers;

determining whether another server transceiver is available for additional client transceiver connections; and

rejecting requests for additional client transceiver connections if a preset number of client transceivers has been reached and if at least one other server transceiver is available for additional client transceiver connections.

37. The system according to claim 36, further wherein the plurality of server transceivers are each assigned a unique channel which is controlled by the processor.

38. A system for providing redundant wireless networking for an industrial facility, comprising:

at least two wireless access points, each of the at least two wireless access points being directly associated with a wired network and configured to provide wireless network access within an industrial facility; and

industrial equipment located within the industrial facility, wherein the industrial equipment is configured to select an individual wireless access point from the at least two wireless access points to establish a link to the wired network.

39. The system according to claim 38, wherein each of the at least two wireless access points has a unique fixed identifier.

40. The system according to claim 39, wherein the industrial equipment is configured to sequentially scan the unique fixed identifiers.

41. The system according to claim 38, wherein the industrial equipment is configured to select the individual wireless access point based upon at least one of greatest signal strength, greatest signal quality, and lowest bit-error rate.

42. The system according to claim 38, wherein the at least two wireless access points and the industrial equipment are configured to communicate using at least one of an I.E.E.E. 801.11 and a Bluetooth wireless networking protocol.

43. The system according to claim 38, wherein the wired network utilizes an Internet Protocol.

44. The system according to claim 38, wherein the industrial equipment is equipment associated with one of semiconductor fabrication, pharmaceutical manufacturing, automobile manufacturing, and food processing.

45. The system according to claim 38, wherein the industrial equipment comprises a pump.

46. A system for providing data communications over a power distribution network, comprising:

a host associated with at least one power line, the host being configured to mange a self-configuring data communications network over the at least one power line; and

a plurality of client devices associated with the at least one power line, each of the plurality of client devices being configured to communicate with the host over the at least one power line,

wherein the system is configured so that the communications from each one of the plurality of client devices are relayed through at least one other device of the plurality of client devices.

47. The system according to claim 46, wherein the host is configured to broadcast, via the at least one power line, a routing request to the plurality of client devices.

48. The system according to claim 47, wherein the host is configured to receive acknowledgement messages from the plurality of client devices in response to the routing request, wherein information contained within the acknowledgment messages is used to create a routing list.

49. The system according to claim 46, wherein each of the plurality of client devices is configured to receive a routing request, store a hop associated with the host, and rebroadcast the routing request over the network.

50. The system according to claim 46, wherein the host is configured to communicate with a specific client device based upon a routing list which contains information regarding the path to the specific client device.

51. The system according to claim 46, wherein the host is configured to communicate with a specific client device by broadcasting a message over the network, wherein the message includes an identification code uniquely associated with the client device.

52. The system according to claim 46, wherein the system is configured so that one client device communicates with another client device over the network through the host.

53. The system according to claim 46, wherein the system is configured so that one client device communicates with another client device by broadcasting a routing request and relaying a message through at least one client device to a destination device.

54. The system according to claim 46, wherein the network further comprises industrial equipment associated with at least one of the plurality of client devices.

55. The system according to claim 54, wherein the industrial equipment is equipment associated with one of semiconductor fabrication, pharmaceutical manufacturing, automobile manufacturing, and food processing.

56. The system according to claim 54, wherein the industrial equipment comprises a pump.

57. The system according to claim 46, wherein the host and the plurality of client devices communicate using the HomePlug protocol.

58. The system according to claim 46, wherein the client devices and the at least one power line are configured to provide redundancy within the network.

59. The system according to claim 46, wherein the at least one power line further comprises three-phase alternating current power lines.

60. The system according to claim 59, wherein messages are sent over each phase of the three-phase power lines.

61. The system according to claim 59, wherein messages are sent over one phase of the three-phase power lines, wherein the one phase is one of manually selected and automatically selected.

62. The system according to claim 61, wherein the client devices indicate which phase is used for message communication.

63. A system for providing data communications for industrial applications over a power distribution network, comprising:

a host device configured to manage a self-configuring network;

a plurality of client devices, communicably linked to the host device over at least one power line, wherein each of the plurality of client devices communicates with the host device using ad-hoc communication; and

industrial equipment associated with at least one of the plurality of client devices.

64. The system according to claim 63, wherein the industrial equipment is equipment associated with one of semiconductor fabrication, pharmaceutical manufacturing, automobile manufacturing, and food processing.

65. The system according to claim 63, wherein the industrial equipment comprises a pump.

66. The system according to claim 63, wherein the host device and the plurality of client devices communicate using the HomePlug protocol.

67. The system according to claim 63, wherein the client devices and the at least one power line are configured to provide redundancy within the network.

68. The system according to claim 63, wherein the at least one power line further comprises three-phase alternating current power lines.

69. The system according to claim 68, wherein communications occur over each phase of the three-phase power lines.

70. The system according to claim 68, wherein communications occur over one phase of the three-phase power lines, wherein the one phase is one of manually selected and automatically selected.

71. The system according to claim 70, wherein the client devices indicate which phase is used for communications.

72. A method for providing data communications over power lines, comprising:

initializing data communications over a power line network through self-configuration;

providing data from a source device to at least one intermediate device over the power line network; and

relaying the data from the at least one intermediate device to a destination device over the power line network.

73. The method according to claim 72, wherein the initializing further comprises:

receiving a routing request by at least one device;

storing at least one hop back to a host on the at least one device;

rebroadcasting another routing request from the at least one device;

receiving the rebroadcasted routing request by at least one other device; and

storing at least one hop back to the host on the at least one other device.

74. The method according to claim 73, wherein the rebroadcasting repeats until all devices on the power line network have received a respective routing request.

75. The method according to claim 73, wherein a first routing request originates from the host.

76. The method according to claim 75, further comprising:

appending, to an acknowledgment message, path information associated with each device;

relaying the acknowledgement message through at least one device back to the host in response to the routing request; and

creating a routing list based upon the path information.

77. The method according to claim 73, wherein the storing stores one of a first routing request received, a routing request associated with a strongest signal, and hops associated with a plurality of routing requests.

78. The method according to claim 72, wherein the source device is a host and the destination device is a client, further comprising:

appending, to the data, an identification code associated with the client; and

broadcasting the data and the identification code from the at least one intermediate device to the client.

79. The method according to claim 72, wherein the source device is a host and the destination device is a client, further comprising:

relaying the data from the host to the client through a path which includes the at least one intermediate device, wherein the path is designated by a routing list.

80. The method according to claim 72, wherein the source device is a client and the destination device is a host, further comprising:

relaying data from the client to the host through a path which includes the at least one intermediate device, wherein each hop in the path is based on information stored in each device sending the data within each hop.

81. The method according to claim 80, further comprising:

providing, from each device receiving data within each hop, an acknowledgement to each device sending data within each hop; and

determining, based upon whether the acknowledgement is received, whether the sending device will relay the data through an alternate path.

82. The method according to claim 79, further comprising:

sending an acknowledgment from the client to the host; and

determining, based upon whether the acknowledgement is received, whether the host will relay the data through an alternative path.

83. The method according to claim 82, wherein the alternative path is based upon the routing list.

84. The method according to claim 82, further comprising:

broadcasting a new routing request to the at least one intermediate device;

creating a new routing list based upon the new routing request; and

determining an alternative path based upon the new routing list.

85. The method according to claim 72, further comprising providing redundant paths throughout the power line network.

86. A system for providing redundant networking for industrial applications, comprising:

a host configured to mange data communications over a power distribution network;

at least two devices configured to communicate with the host over the power distribution network, wherein communications from each one of the devices are relayed through at least one other device of the at least two devices;

at least two wireless access points directly associated with the at least two devices and configured to provide wireless network access within an industrial facility; and

industrial equipment located within the industrial facility, wherein the industrial equipment is configured to select an individual wireless access point from the at least two wireless access points to establish a data communications link to the power distribution network.