METHOD AND SYSTEM FOR JOINT PARAMETER OPTIMIZATION FOR MACRO AND FEMTO CELLS

• US 20130225182A1
• Filed: 02/21/2013
• Published: 08/29/2013
• Est. Priority Date: 02/24/2012
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: SINGH, Damanjit, Tinnakornsrisuphap, Peerapol, Yavuz, Mehmet, Chevallier, Christophe
• Application Number:
  US13/773,577
• Publication Number:
  US 20130225182A1
• Time in Patent Office: Days
• US Class Current: 455/444
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/008375 based on historical data
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 36/247 by using coverage extension
• CPC Class Codes: H04W 36/26 by agreed or negotiated communication parameters
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Disclosed are systems and methods for joint parameter optimization for collocated macrocells and femtocells in a wireless communication network. In one aspect, the method comprises: collecting one or more performance parameters from the one or more collocated macrocells and femtocells, detecting frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells, optimizing one or more cell reselection and handover parameters for the one or more collocated macrocells and femtocells based on the performance parameters, and overwriting one or more corresponding parameters of the collocated macrocells and femtocells with the one or more optimized cell reselection and handover parameters in order to reduce frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells in a wireless communication network.

Claims

1. A method for wireless communication, comprising:

collecting one or more performance parameters from one or more collocated macrocells and femtocells in a wireless communication network;

detecting frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells;

optimizing one or more of cell reselection and handover parameters for the one or more collocated macrocells and femtocells based on the performance parameters; and

overwriting one or more corresponding parameters of the one or more collocated macrocells and femtocells with the one or more of optimized cell reselection and handover parameters.

2. The method of claim 1, wherein the collected performance parameters for a macrocell or femtocell include one or more of:

the number of cell reselections, number of cell handovers, types of handovers, number of call drops, average UL interference, average cell capacity used and available cell capacity, number of users served by the cell, number of connections established, traffic pattern at backhaul, and traffic pattern of mobile devices served by the cell.

3. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing Qqualmin parameter of a macrocell.

4. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing Qoffset parameter of a macrocell.

5. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing Treselection parameter of a femtocell.

6. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing HCS priority of a femtocell.

7. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing Qhyst of a macrocell.

8. The method of claim 1, wherein optimizing one or more cell reselection parameters includes changing frequency of transmitting a reselection beacon by the femtocell.

9. The method of claim 1, wherein optimizing one or more cell handover parameters includes allocating additional subframes to a femtocell.

10. The method of claim 1, wherein optimizing one or more cell handover parameters includes changing hysteresis or time-to-trigger of a femtocell.

11. The method of claim 1, wherein the one or more of optimized cell reselection and handover parameters reduce frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells.

12. An apparatus for wireless communication, comprising:

a parameter collection component configured to collect one or more performance parameters from one or more collocated macrocells and femtocells in a wireless communication network;

a parameter optimization component configured to;

detect frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells; and

optimize one or more of cell reselection and handover parameters for the one or more collocated macrocells and femtocells based on the performance parameters; and

a parameter overwriting component configured to overwrite one or more corresponding parameters of the collocated macrocells and femtocells with the one or more of optimized cell reselection and handover parameters.

13. The apparatus of claim 12, wherein the collected performance parameters for a macrocell or femtocell include one or more of:

the number of cell reselections, number of cell handovers, types of handovers, number of call drops, average UL interference, average cell capacity used and available cell capacity, number of users served by the cell, number of connections established, traffic pattern at backhaul, and traffic pattern of mobile devices served by the cell.

14. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a Qqualmin parameter of a macrocell.

15. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a Qoffset parameter of a macrocell.

16. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a Treselection parameter of a femtocell.

17. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a HCS priority of a femtocell.

18. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a Qhyst of a macrocell.

19. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a frequency of transmitting a reselection beacon by the femtocell.

20. The apparatus of claim 12, wherein the parameter optimization component is further configured to allocate additional subframes to a femtocell.

21. The apparatus of claim 12, wherein the parameter optimization component is further configured to change a hysteresis or time-to-trigger of a femtocell.

22. The apparatus of claim 12, wherein the one or more of optimized cell reselection and handover parameters reduce frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells.

23. A computer program product wireless communication, the product comprising a non-transitory computer-readable medium comprising:

a first set of codes for collecting one or more performance parameters from one or more collocated macrocells and femtocells in a wireless communication network;

a second set of codes for detecting frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells;

a third set of codes for optimizing one or more of cell reselection and handover parameters for the one or more collocated macrocells and femtocells based on the performance parameters; and

a fourth set of codes for overwriting one or more corresponding parameters of the collocated macrocells and femtocells with the one or more of optimized cell reselection and handover parameters.

24. The product of claim 23, wherein the collected performance parameters for a macrocell or femtocell include one or more of:

the number of cell reselections, number of cell handovers, types of handovers, number of call drops, average UL interference, average cell capacity used and available cell capacity, number of users served by the cell, number of connections established, traffic pattern at backhaul, and traffic pattern of mobile devices served by the cell.

25. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing Qqualmin parameter of a macrocell.

26. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing Qoffset parameter of a macrocell.

27. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing Treselection parameter of a femtocell.

28. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing HCS priority of a femtocell.

29. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing Qhyst of a macrocell.

30. The product of claim 23, wherein codes for optimizing one or more cell reselection parameters include codes for changing frequency of transmitting a reselection beacon by the femtocell.

31. The product of claim 23, wherein codes for optimizing one or more cell handover parameters include codes for allocating additional subframes to a femtocell.

32. The product of claim 23, wherein codes for optimizing one or more cell handover parameters include codes for changing hysteresis or time-to-trigger of a femtocell.

33. The product of claim 23, wherein the one or more of optimized cell reselection and handover parameters reduce frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells.

34. An apparatus for wireless communication, comprising:

means for collecting one or more performance parameters from one or more collocated macrocells and femtocells in a wireless communication network;

means for detecting frequent cell reselections or frequent cell handovers by mobile devices between the one or more collocated macrocells and femtocells;

means for optimizing one or more of cell reselection and handover parameters for the one or more collocated macrocells and femtocells based on the performance parameters; and

means for overwriting one or more corresponding parameters of the collocated macrocells and femtocells with the one or more of optimized cell reselection and handover parameters.

35. The apparatus of claim 34, wherein the collected performance parameters for a macrocell or femtocell include one or more of:

the number of cell reselections, number of cell handovers, types of handovers, number of call drops, average UL interference, average cell capacity used and available cell capacity, number of users served by the cell, number of connections established, traffic pattern at backhaul, and traffic pattern of mobile devices served by the cell.

36. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing Qqualmin parameter of a macrocell.

37. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing Qoffset parameter of a macrocell.

38. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing Treselection parameter of a femtocell.

39. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing HCS priority of a femtocell.

40. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing Qhyst of a macrocell.

41. The apparatus of claim 34, wherein means for optimizing one or more cell reselection parameters includes means for changing frequency of transmitting a reselection beacon by the femtocell.

42. The apparatus of claim 34, wherein means for optimizing one or more cell handover parameters includes means for allocating additional subframes to a femtocell.

43. The apparatus of claim 34, wherein means for optimizing one or more cell handover parameters includes means for changing hysteresis or time-to-trigger of a femtocell.

44. The apparatus of claim 34, wherein the one or more optimized cell reselection and handover parameters reduce frequent cell reselections or frequent cell handovers by mobile devices between the one or more of collocated macrocells and femtocells.