Interference based dynamic channel assignment

• US 6,108,321 A
• Filed: 03/05/1997
• Issued: 08/22/2000
• Est. Priority Date: 06/28/1996
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Grandhi, Sudheer A., Borst, Simon C., Sand, Donna M., Chew, Lindsey, Anderson, Nefatiti, Cannell, Lynell E., I, Chih-Lin, Cheng, Terry Si-Fong, Narendran, Balakrishnan, Lubachevsky, Boris Dmitrievich, Kaufman, Joseph Samuel
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US08/811,986
• Time in Patent Office: 1,266 Days
• Field of Search: 370/328, 370/329, 370/330, 370/334, 370/341, 370/431, 370/437, 370/444, 370/332, 370/335, 370/336, 370/337, 455/422, 455/447, 455/450, 455/452
• US Class Current: 370/329
• CPC Class Codes: H04W 16/04 Traffic adaptive resource partitioning
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An interference based dynamic channel assignment scheme for a wireless communication network, for self configuring dynamic channel assignment of a plurality of channels, comprises the steps of: prioritizing a channel list and prioritizing a selected subset of the prioritized channel list. In further enhancements of the present invention, prioritizing a channel list is distributed on a per cell/sector basis so that prioritization is independent of frequency usage information from other cells/sectors and prioritization is based upon uplink and downlink characteristics.

Claims

1. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors, wherein the step of prioritizing said channel list the priority is assigned as a function of long term interference variations;

prioritizing a selected subset of said prioritized channel list; and

dynamically assigning said plurality of channels from said selected subset.

2. The method as recited in claim 1 wherein the step of prioritizing a channel list is frequency-channel based.

3. The method as recited in claim 1 wherein the step of prioritizing a selected subset of said prioritized channel list is frequency-channel based.

4. The method as recited in claim 1 wherein said function of long term interference variations is a moving average.

5. The method as recited in claim 4 wherein said moving average is a moving average of received signal strength.

6. The method as recited in claim 5 wherein said received signal strength is selected from a sample above a predetermined threshold.

7. The method as recited in claim 5 wherein said received signal strength is weighted.

8. The method as recited in claim 7 wherein said weight is adjusted so that moving averages decrease when interference is low and increase when interference is high.

9. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list;

wherein the step of prioritizing said selected subset of said prioritized channel list is assigned as a function of short term interference variations; and

dynamically assigning said plurality of channels from said selected subset.

10. The method as recited in claim 9 wherein said function of short term interference variations is a function of near instantaneous interference measurements.

11. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said channel list is time-slot-channel based; and

dynamically assigning said plurality of channels from said selected subset.

12. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said selected subset of said prioritizing channel list is time-slot-channel based; and

dynamically assigning said plurality of channels from said selected subset.

13. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the priority of said selected subset is updated more frequently than the priority of said channel list; and

dynamically assigning said plurality of channels from said selected subset.

14. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein said step of prioritizing said selected subset of said prioritized channel list is performed more frequently than said step of prioritizing said channel list; and

dynamically assigning said plurality of channels from said selected subset.

15. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said channel list the priority is assigned as a function of uplink characteristics; and

dynamically assigning said plurality of channels from said selected subset.

16. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said selected subset of said prioritized channel list the priority is assigned as a function of uplink characteristics; and

dynamically assigning said plurality of channels from said selected subset.

17. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said channel list the priority is assigned as a function of downlink characteristics; and

dynamically assigning said plurality of channels from said selected subset.

18. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list, wherein the step of prioritizing said selected subset of said prioritized channel list the priority is assigned as a function of downlink characteristics; and

dynamically assigning said plurality of channels from said selected subset.

19. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list; and

dynamically assigning a call when an available channel has a CIR greater than a predetermined minimum.

20. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list; and

dynamically assigning a channel from said selected subset of said prioritized channel list with best CIR.

21. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing said channel list distributed on a per cell and/or sector basis so that prioritization is independent of frequency usage information from other cells and/or sectors;

prioritizing a selected subset of said prioritized channel list; and

dynamically assigning a channel from said selected subset of said prioritized channel list that has at least a minimum CIR threshold.

22. In a wireless communication network, a method for dynamic channel assignment of a plurality of channels, the method comprising the steps of:

prioritizing a channel list of uplink channels and downlink channels distributed on a per cell/sector basis so that prioritization is independent of frequency usage information from other cells/sectors, wherein the step of prioritizing said channel list the priority is assigned as a function of long term interference variations;

prioritizing a selected subset of said prioritized channel list; and

dynamically assigning said plurality of channels from said selected subset.

23. The method as recited in claim 22 wherein the step of prioritizing a selected subset of said prioritized channel list the priority is assigned as a function of short term interference variations.

24. The method as recited in claim 23 wherein said function of short term interference variations is a function of near instantaneous interference measurements.

25. The method as recited in claim 22 wherein the step of prioritizing a channel list is frequency-channel based.

26. The method as recited in claim 22 wherein the step of prioritizing a channel list is time-slot-channel based.

27. The method as recited in claim 22 wherein the step of prioritizing a selected subset of said prioritized channel list is frequency-channel based.

28. The method as recited in claim 22 wherein the step of prioritizing a selected subset of said prioritizing channel list is time-slot-channel based.

29. The method as recited in claim 22 wherein said function of long term interference variations is a moving average.

30. The method as recited in claim 29 wherein said moving average is a moving average of received signal strength.

31. The method as recited in claim 30 wherein said received signal strength is selected from a sample above a predetermined threshold.

32. The method as recited in claim 30 wherein said received signal strength is weighted.

33. The method as recited in claim 32 wherein said weight is adjusted so that moving averages decrease when interference is low and increase when interference is high.

34. The method as recited in claim 22 wherein the priority of said selected subset is updated more frequently than the priority of said channel list.

35. The method as recited in claim 22 wherein said step of prioritizing a selected subset of said prioritized channel list is performed more frequently than said step of prioritizing a channel list.

36. The method as recited in claim 22 wherein the step of prioritizing a channel list the priority is assigned as a function of uplink characteristics.

37. The method as recited in claim 22 wherein the step of prioritizing a selected subset of said prioritized channel list the priority is assigned as a function of uplink characteristics.

38. The method as recited in claim 22 wherein the step of prioritizing a channel list the priority is assigned as a function of downlink characteristics.

39. The method as recited in claim 22 wherein the step of prioritizing a selected subset of said prioritized channel list the priority is assigned as a function of downlink characteristics.

40. The method as recited in claim 22 further comprising the step of:

admitting a call when an available channel has a CIR greater than a predetermined minimum.

41. The method as recited in claim 22 further comprising the step of:

assigning a channel from said selected subset of said prioritized channel list with best CIR.

42. The method as recited in claim 22 further comprising the step of:

assigning a channel from said selected subset of said prioritized channel list that has at least a minimum CIR threshold.