Multi-network manager, method and system

• US 9,451,468 B2
• Filed: 06/23/2011
• Issued: 09/20/2016
• Est. Priority Date: 12/23/2008
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Research Ltd. (ABB Ltd.)
• Inventors: Lennvall, Tomas, Seceleanu, Tiberiu
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): LOPATA, ROBERT J
• Application Number:
  US13/167,535
• Publication Number:
  US 20110280226A1
• Time in Patent Office: 1,916 Days
• Field of Search: 370/310, 370/328, 370/329, 370/336, 370/337
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A method for reducing interference between wireless networks for industrial devices. The method includes the steps of: obtaining a first resource schedule of a first wireless network manager; obtaining a second resource schedule of a second wireless network manager; determining whether there are resource conflicts between the first resource schedule and the second resource schedule; and providing, when at least one resource conflict is determined, a new wireless resource schedule for the first wireless network manager to avoid at least part of the determined resource conflicts. A corresponding multi-network manager, system and computer program product are also presented.

Claims

1. A method for reducing interference between at least two wireless networks for industrial devices, comprising the steps of:

providing a centralized architecture comprising a multi-network manager that is configured to establish resource allocations and assignments in at least one of the at least two wireless networks;

obtaining by the multi-network manager a first resource schedule of a first wireless network from a first manager of the first wireless network;

obtaining by the multi-network manager a second resource schedule of a second wireless network from a second manager of the second wireless network;

determining by the multi-network manager whether there are resource conflicts between said first resource schedule from said first manager and said second resource schedule from said second manager; and

generating via the multi-network manager, when at least one resource conflict is determined, a new wireless resource schedule which assigns resources to industrial devices in the first wireless network, and transmitting said new wireless resource schedule to said first manager of the first wireless network, wherein said first manager implements the new wireless resource schedule into the first wireless network to avoid at least part of said determined resource conflicts;

wherein said first and second resource schedules and said new wireless resource schedule are time slot schedules or frequency hopping information for channels of the respective wireless network or a combination of both.

2. The method according to claim 1, wherein said step of determining whether there are resource conflicts involves determining that said first resource schedule and said second resource schedule assign a use of a same frequency band at a same time.

3. The method according to claim 1, wherein said step of determining whether there are resource conflicts involves determining conflicting time slot usage between said first resource schedule and said second resource schedule.

4. The method according to claim 3, wherein said step of generating and transmitting a new wireless resource schedule involves providing a new time slot schedule for at least one channel of said first wireless network manager.

5. The method according to claim 1, wherein said step of determining whether there are resource conflicts involves determining a future resource assignment of said first resource schedule or said second resource schedule using a seed for a frequency hopping scheme.

6. The method according to claim 5, wherein said step of generating and transmitting a new wireless resource schedule involves providing a new seed for at least one channel of said first wireless network manager.

7. The method according to claim 1, wherein said method is performed in conjunction with deployment of said first wireless network manager or said second wireless network manager.

8. The method according to claim 1, wherein said method is performed periodically.

9. The method according to claim 1, wherein said step of determining whether there are resource conflicts only considers devices belonging to one network, of said first network and second network, being within range of the other network, of said first network and second network.

15. The method according to claim 1, wherein said first and second wireless networks conform to IEEE 802.15.4 standard.

16. The method according to claim 1, wherein said first and second wireless networks conform to WirelessHART standard.

17. The method according to claim 1, wherein said first and second wireless networks conform to ISA 100 standard.

18. The method according to claim 1, wherein said first and second wireless networks conform to Bluetooth standard.

10. A multi-network manager for reducing interference between wireless networks for industrial devices, comprising:

means for obtaining a first resource schedule of a first wireless network from a first manager of the first wireless network;

means for obtaining a second resource schedule of a second wireless network from a second manager of a second wireless network;

means for determining whether there are resource conflicts between said first resource schedule from said first manager and said second resource schedule from said second manager; and

means for generating, when at least one resource conflict is determined, a new wireless resource schedule which assigns resources to industrial devices in the first wireless network, and for transmitting said new wireless resource schedule to said first manager of the first wireless network, wherein the new wireless resource schedule is to be implemented by said first manager into the first wireless network to avoid at least part of said determined resource conflicts;

wherein said multi-network manager forms a centralized architecture with said first and second wireless networks and is configured to establish resource allocations and assignments in at least one of the first and second wireless networks;

wherein said first and second resource schedules and said new wireless resource schedule are time slot schedules or frequency hopping information for channels of the respective wireless network or a combination of both.

11. The multi-network manager according to claim 10, wherein said multi-network manager is distinct from said first wireless network manager and said second wireless network manager.

12. A system for reducing interference between wireless sensor networks for industrial devices comprising:

a first manager of a first wireless sensor network, said first manager providing communication for a first group of industrial devices;

a second manager of a second wireless sensor network said second manager providing communication for a second group of industrial devices; and

multi-network manager having

means for obtaining a first resource schedule of the first wireless sensor network from said first manager of the first wireless sensor network,

means for obtaining a second resource schedule of the second wireless sensor network from said second manager of the second wireless sensor network,

means for determining whether there are resource conflicts between said first resource schedule from said first manager and said second resource schedule from said second manager, and

means for generating, when at least one resource conflict is determined, a new wireless resource schedule which assigns resources to the first group of industrial devices, and for transmitting said new wireless resource schedule to said first manager of the first wireless sensor network, wherein the new wireless resource schedule is to be implemented by said first manager into the first wireless sensor network to avoid at least part of said determined resource conflicts;

wherein said multi-network manager forms a centralized architecture with said first and second wireless sensor networks and is configured to establish resource allocations and assignments in at least one of the first and second wireless sensor networks;

wherein said multi-network manager, in generating the new wireless resource schedule, maintains the first group of industrial devices associated with said first manager and the second group of industrial devices associated with said second manager.

13. The system according to claim 12, further comprising a third wireless network manager.

14. A computer program product stored on an internal non-transitory memory of a multi-network network manager, arranged to perform, when said product is executed in said multi-network manager,

the steps of:

providing a centralized architecture between said multi-network manager and at least two wireless networks, said multi-network manager being configured to establish resource allocations and assignments in at least one of the at least two wireless networks;

obtaining by the multi-network manager a first resource schedule of a first wireless network from a first manager of the first wireless network;

obtaining by the multi-network manager a second resource schedule of a second wireless network from a second manager of the second wireless network;

determining by the multi-network manager whether there are resource conflicts between said first resource schedule from said first manager and said second resource schedule from said second manager; and

generating via the multi-network manager, when at least one resource conflict is determined, a new wireless resource schedule which assigns resources to industrial devices in the first wireless network, and transmitting said new wireless resource schedule to said first manager of the first wireless network, wherein the new wireless resource schedule is to be implemented by said first manager into the first wireless network to avoid at least part of said determined resource conflicts;

wherein said first and second resource schedules and said new wireless resource schedule are time slot schedules or frequency hopping information for channels of the respective wireless network or a combination of both.