Multiband antenna for cooperative MIMO

• US 8,676,221 B2
• Filed: 06/11/2009
• Issued: 03/18/2014
• Est. Priority Date: 06/11/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Nagaraja, Nagendra
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): Lu, William
• Application Number:
  US12/482,862
• Publication Number:
  US 20100316002A1
• Time in Patent Office: 1,741 Days
• Field of Search: 455/73, 455/90.2, 455/509, 455/115, 455/507, 455/522, 455445-449, 375/299, 375/260, 343/861, 370/338, 370/229, 370/248, 370/252
• US Class Current: 455/449
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

Certain aspects provide a method for reducing interference in a cooperative MIMO system.

Claims

1. A method for wireless communications in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the method comprising:

receiving, at a first mobile station, information from a base station, the information associated with a first frequency band and a second frequency band, wherein the first frequency band is for transmissions between the first mobile station and the base station, and wherein the second frequency band is for transmissions between the first mobile station and one or more second mobile stations;

monitoring signals received over the second frequency band and measuring power of the signals;

transmitting, to the base station, at least one power value of the signals received over the second frequency band;

receiving, at the first mobile station from the base station, an allowable power value for the second frequency band; and

transmitting data over the first frequency band and the second frequency band, wherein transmission power for transmission over the second frequency band is less than the allowable power value for the second frequency band.

2. The method of claim 1, wherein the data is transmitted simultaneously over the first frequency band and the second frequency band using a multi-band antenna.

3. The method of claim 1, wherein the signals received over the second frequency band are transmitted from the one or more second mobile stations in a vicinity of the first mobile station.

4. The method of claim 1, wherein the second frequency band employs a multiple access channel or a random access channel.

5. The method of claim 1, wherein the allowable power value for transmission over the second frequency band is less than a second allowable power value for transmission over the first frequency band.

6. The method of claim 1, wherein transmitting the data over the first frequency band by the first mobile station comprises concatenating the information received from the base station with cooperative information received from the one or more second mobile stations to generate a scalable frame for uplink transmission, wherein concatenating the information includes concatenating data packets.

7. The method of claim 1, wherein the at least one power value of signals is transmitted wirelessly.

8. The method of claim 1, wherein the at least one power value of signals is transmitted in a particular transmission.

9. A method for wireless communications by a base station in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the method comprising:

selecting at least a first frequency band for direct transmission with a first mobile station;

selecting at least a second frequency band for transmissions between the first mobile station and one or more second mobile stations;

transmitting information about the first frequency band and the second frequency band to the first mobile station;

receiving, from the first mobile station, at least one power value of signals the first mobile station received in the second frequency band from the one or more second mobile stations in a vicinity of the first mobile station;

assigning an allowable power value to the first mobile station for the second frequency band; and

transmitting, to the first mobile station, the allowable power value for the second frequency band.

10. The method of claim 9, wherein the second frequency band employs a multiple access channel.

11. The method of claim 9, wherein the second frequency band employs a random access channel.

12. The method of claim 9, further comprising:

employing a first power control scheme for the first frequency band and employing a second power control scheme for the second frequency band; and

assigning a second allowable power value to the first mobile station for the first frequency band.

13. The method of claim 12, wherein the allowable power value is less than the second allowable power value.

14. The method of claim 9, wherein the allowable power value is calculated based on a threshold and the at least one power value of signals.

15. The method of claim 9, wherein the at least one power value of signals is received wirelessly.

16. The method of claim 9, wherein the at least one power value of signals is received in a particular transmission.

17. An apparatus for wireless communications in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the apparatus comprising:

a processor;

a transceiver coupled to the processor, wherein the transceiver is configured to receive information from a base station, the information associated with a first frequency band and a second frequency band, wherein the first frequency band is for transmissions between a first mobile station and the base station, and wherein the second frequency band is for transmissions between the first mobile station and one or more second mobile stations; and

a signal detector coupled to the processor, wherein the signal detector is configured to;

monitor signals received over the second frequency band; and

measure power of the signals;

wherein the transceiver is further configured to;

transmit, to the base station, at least one power value of the signals received over the second frequency band;

receive an allowable power value for the second frequency band from the base station; and

transmit data over the first frequency band and the second frequency band, wherein transmission power for transmission over the second frequency band is less than the allowable power value for the second frequency band.

18. The apparatus of claim 17, wherein the data is transmitted simultaneously over the first frequency band and the second frequency band using a multi-band antenna.

19. The apparatus of claim 17, wherein the signals received over the second frequency band are transmitted from the one or more second mobile stations in a vicinity of the first mobile station.

20. The apparatus of claim 17, wherein the second frequency band employs a multiple access channel or a random access channel.

21. The apparatus of claim 17, wherein the allowable power value for transmission over the second frequency band is less than a second allowable power value for transmission over the first frequency band.

22. The apparatus of claim 17, wherein transmitting the data over the first frequency band comprises concatenating the information received from the base station with cooperative information received from the one or more second mobile stations to generate a scalable frame for uplink transmission, wherein concatenating the information includes concatenating data packets.

23. The apparatus of claim 17, wherein the transceiver is further configured to receive the information wirelessly.

24. The apparatus of claim 17, wherein the at least one power value of signals is transmitted in a particular transmission.

25. An apparatus for wireless communications by a base station in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the apparatus comprising:

a processor configured to;

select at least a first frequency band for direct transmission with a first mobile station; and

select at least a second frequency band to be used for transmissions between the first mobile station and one or more second mobile stations; and

a transceiver coupled to the processor, wherein the transceiver is configured to;

transmit information about the first frequency band and the second frequency band to the first mobile station;

receive, from the first mobile station, at least one power value of signals the first mobile station received in the second frequency band from the one or more second mobile stations in a vicinity of the first mobile station; and

transmit an allowable power value for the second frequency band to the first mobile station.

26. The apparatus of claim 25, wherein the second frequency band employs a multiple access channel.

27. The apparatus of claim 25, wherein the second frequency band employs a random access channel.

28. The apparatus of claim 25, wherein the processor is further configured to:

employ a first power control scheme for the first frequency band;

employ a second power control scheme for the second frequency band; and

assign a second allowable power value to the first mobile station for the first frequency band.

29. The apparatus of claim 28, wherein the allowable power value for transmission over the second frequency band is less than the second allowable power value for transmission over the first frequency band.

30. The apparatus of claim 25, wherein the processor is further configured to calculate the allowable power value based on a threshold and the at least one power value of signals.

31. The apparatus of claim 25, wherein the transceiver is further configured to receive the information wirelessly.

32. The apparatus of claim 25, wherein the at least one power value of signals is received in a particular transmission.

33. An apparatus for wireless communications in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the apparatus comprising:

means for receiving information from a base station, the information associated with a first frequency band and a second frequency band, wherein the first frequency band is for transmissions between a first mobile station and the base station, and wherein the second frequency band is for transmissions between the first mobile station and one or more second mobile stations;

means for monitoring signals received over the second frequency band and measuring power of the signals;

means for transmitting, to the base station, at least one power value of the signals received over the second frequency band;

means for receiving, from the base station, an allowable power value for the second frequency band; and

means for transmitting data over the first frequency band and the second frequency band, wherein transmission power for transmission over the second frequency band is less than the allowable power value for the second frequency band.

34. The apparatus of claim 33, wherein the data is transmitted simultaneously over the first frequency band and the second frequency band using a multi-band antenna.

35. The apparatus of claim 33, wherein the signals received over the second frequency band are transmitted from the one or more second mobile stations in a vicinity of the first mobile station.

36. The apparatus of claim 33, wherein the second frequency band employs a multiple access channel.

37. The apparatus of claim 33, wherein the second frequency band employs a random access channel.

38. The apparatus of claim 33, wherein the allowable power value for transmission over the second frequency band is less than a second allowable power value for transmission over the first frequency band.

39. The apparatus of claim 33, wherein the means for transmitting data over the first frequency band by the first mobile station comprises:

means for concatenating the information from the first mobile station with cooperative information received from the one or more second mobile stations to generate a scalable frame for uplink transmission;

wherein the means for concatenating comprises means for concatenating data packets.

40. An apparatus for wireless communications in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the apparatus comprising:

means for selecting at least a first frequency band for direct transmission with a first mobile station;

means for selecting at least a second frequency band for transmissions between the first mobile station and one or more second mobile stations;

means for transmitting information about the first frequency band and the second frequency band to the first mobile station;

means for receiving, from the first mobile station, at least one power value of signals the first mobile station received in the second frequency band from the one or more second mobile stations in a vicinity of the first mobile station;

means for assigning an allowable power value to the first mobile station for the second frequency band; and

means for transmitting the allowable power value for the second frequency band to the first mobile station.

41. The apparatus of claim 40, wherein the second frequency band employs a multiple access channel.

42. The apparatus of claim 40, wherein the second frequency band employs a random access channel.

43. The apparatus of claim 40, further comprising:

means for employing a first power control scheme for the first frequency band and employing a second power control scheme for the second frequency band; and

means for assigning a second allowable power value to the first mobile station for the first frequency band.

44. The apparatus of claim 43, wherein the allowable power value is less than the second allowable power value.

45. The apparatus of claim 40, wherein the allowable power value is determined by means for calculating the allowable power value based at least on a threshold and the at least one power value of signals.

46. A computer-program product for wireless communications in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the computer-program product comprising a non-transitory computer readable medium storing instructions executable by one or more processors, the instructions comprising:

instructions for receiving, at a first mobile station, information from a base station, the information associated with a first frequency band and a second frequency band, wherein the first frequency band is for transmissions between the base station and the first mobile station, and wherein the second frequency band is for transmissions between the first mobile station and one or more second mobile stations;

instructions for monitoring signals received over the second frequency band and measuring power of the signals;

instructions for transmitting, from the first mobile station to the base station, at least one power value of the signals received over the second frequency band;

instructions for receiving, at the first mobile station from the base station, an allowable power value for the second frequency band; and

instructions for transmitting data over the first frequency band and the second frequency band, wherein transmission power for transmission over the second frequency band is less than the allowable power value for the second frequency band.

47. The computer-program product of claim 46, wherein the data is transmitted simultaneously over the first frequency band and the second frequency band using a multiband antenna.

48. The computer-program product of claim 46, wherein the signals received over the second frequency band are transmitted from the one or more second mobile stations in a vicinity of the first mobile station.

49. The computer-program product of claim 46, wherein the second frequency band employs a multiple access channel.

50. The computer-program product of claim 46, wherein the second frequency band employs a random access channel.

51. The computer-program product of claim 46, wherein the allowable power value for transmission over the second frequency band is less than a second allowable power value for transmission over the first frequency band.

52. The computer-program product of claim 46, wherein the instructions for transmitting data over the first frequency band by the first mobile station comprise instructions for concatenating the information received from the first mobile station with cooperative information received from the one or more second mobile stations to generate a scalable frame for uplink transmission, wherein the instructions for concatenating the information comprise instructions for concatenating data packets.

53. A computer-program product for wireless communications by a base station in a cooperative multiple input multiple output (MIMO) system using multiband antennas, the computer-program product comprising a non-transitory computer readable medium storing instructions executable by one or more processors, the instructions comprising:

instructions for selecting at least a first frequency band for direct transmission with a first mobile station and selecting at least a second frequency band for transmissions between the first mobile station and one or more second mobile stations;

instructions for transmitting information about the first frequency band and the second frequency band to the first mobile station;

instructions for receiving from the first mobile station, at least one power value of signals the first mobile station received in the second frequency band from the one or more second mobile stations in a vicinity of the first mobile station;

instructions for assigning an allowable power value to the first mobile station for the second frequency band; and

instructions for transmitting the allowable power value for the second frequency band to the first mobile station.

54. The computer-program product of claim 53, wherein the second frequency band employs a multiple access channel.

55. The computer-program product of claim 53, wherein the second frequency band employs a random access channel.

56. The computer-program product of claim 53, further comprising:

instructions for employing a first power control scheme for the first frequency band and employing a second power control scheme for the second frequency band; and

instructions for assigning a second allowable power value to the first mobile station for the first frequency band.

57. The computer-program product of claim 56, wherein the allowable power value for transmission over the second frequency band is less than the second allowable power value for transmission over the first frequency band.

58. The computer-program product of claim 53, wherein the allowable power value is calculated based at least on a threshold and the at least one power value of signals.