High data rate broadcast channel systems, devices, and methods

• US 9,516,626 B2
• Filed: 02/11/2013
• Issued: 12/06/2016
• Est. Priority Date: 02/11/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Barany, Peter Anthony, Quick, Roy Franklin Jr., Park, Edwin C., Das, Soumya
• Primary Examiner(s): PHUNKULH, BOB A
• Application Number:
  US13/763,937
• Publication Number:
  US 20140226569A1
• Time in Patent Office: 1,394 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Methods, systems, and devices are provided that may enable wireless communications systems that utilize flexible bandwidths to transmit at the same or similar rates as wireless communications systems that utilize normal bandwidths. Some embodiments identify a target rate for a broadcast channel of a first bandwidth carrier system and transmit broadcast information utilizing the target rate. The target rate is higher than a scaled rate that results from scaling the rate for a broadcast channel of a second bandwidth carrier system by a bandwidth scaling factor. The first and second bandwidth carrier systems may be flexible and normal bandwidth carrier systems, respectively. To compensate for the bandwidth scaling and effectively maintain the rate at which information is transmitted in normal bandwidth carrier systems, different optimized schedules for system and master information transmission, different channelization codes and channels, and/or different scaled spreading factors may be identified and utilized.

Claims

1. A method for data communication, comprising:

identifying a target rate for a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein the target rate is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

transmitting broadcast information of the flexible bandwidth carrier system using the target rate.

2. The method of claim 1, wherein the target rate is a target data rate.

3. The method of claim 1, wherein the target rate is a target repetition rate.

4. The method of claim 1, further comprising:

adding an additional broadcast channel of the flexible bandwidth carrier system; and

transmitting the broadcast information through both broadcast channels of the flexible bandwidth carrier system using the target rate.

5. The method of claim 1, wherein:

the target rate is an information data rate, and

the information data rate is substantially the same as the rate for the broadcast channel of the normal bandwidth carrier system.

6. The method of claim 1, further comprising:

utilizing a location of each information block transmitted in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate.

7. The method of claim 6, further comprising:

scheduling the location of each information block in the radio frame cycle.

8. The method of claim 6, wherein the information block is a system information block (SIB).

9. The method of claim 6, wherein the information block is a master information block (MIB).

10. The method of claim 1, further comprising:

mapping information blocks to radio frames in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein a duration of the radio frames is based on the bandwidth scaling factor.

11. The method of claim 1, further comprising:

utilizing a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

12. The method of claim 1, wherein the broadcast information includes one or more of signal strength information for access, service provider information, and neighboring cells information.

13. The method of claim 1, wherein the bandwidth scaling factor is an integer value or a rational value.

14. A method for data communication, comprising:

receiving, at a user equipment, broadcast information transmitted through a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein a target rate at which the broadcast information is received is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

processing the broadcast information to identify candidate cells for communication with the user equipment.

15. The method of claim 14, wherein the target rate is a target data rate.

16. The method of claim 14, wherein the target rate is a target repetition rate.

17. The method of claim 14, wherein receiving the broadcast information comprises:

receiving the broadcast information at the target rate through the broadcast channel of the flexible bandwidth carrier system and through an additional broadcast channel of the flexible bandwidth carrier system.

18. The method of claim 14, wherein receiving the broadcast information comprises:

receiving one or more of signal strength information for access, service provider information, and neighboring cells information.

19. The method of claim 14, wherein receiving the broadcast information comprises:

receiving a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system, wherein information blocks are mapped to radio frames in the radio frame cycle based on the target rate and a duration of the radio frames is based on the bandwidth scaling factor.

20. The method of claim 19, wherein the information blocks comprise at least one system information block (SIB).

21. The method of claim 19, wherein the information blocks comprise at least one master information block (MIB).

22. The method of claim 14, wherein receiving the broadcast information comprises:

receiving the broadcast information at the target rate based on a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

23. A wireless communications system, comprising:

means for identifying a target rate for a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein the target rate is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

means for transmitting broadcast information of the flexible bandwidth carrier system using the target rate.

24. The wireless communications system of claim 23, wherein the target rate is a target data rate.

25. The wireless communications system of claim 23, wherein the target rate is a target repetition rate.

26. The wireless communications system of claim 23, further comprising:

means for adding an additional broadcast channel of the flexible bandwidth carrier system; and

means for transmitting the broadcast information through both broadcast channels of the flexible bandwidth carrier system using the target rate.

27. The wireless communications system of claim 23, wherein:

the target rate is an information data rate, and the information data rate is substantially the same as the rate for the broadcast channel of the normal bandwidth carrier system.

28. The wireless communications system of claim 23, further comprising:

means for utilizing a location of each information block transmitted in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate.

29. The wireless communications system of claim 28, further comprising:

means for scheduling the location of each information block in the radio frame cycle.

30. The wireless communications system of claim 29, wherein the information block is a system information block (SIB).

31. The wireless communications system of claim 29, wherein the information block is a master information block (MIB).

32. The wireless communications system of claim 23, further comprising:

means for mapping information blocks to radio frames in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein a duration of the radio frames is based on the bandwidth scaling factor.

33. The wireless communications system of claim 23, further comprising:

means for utilizing a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

34. The wireless communications system of claim 23, wherein the broadcast information includes one or more of signal strength information for access, service provider information, and neighboring cells information.

35. The wireless communications system of claim 23, wherein the bandwidth scaling factor is an integer value or a rational value.

36. A wireless communications system, comprising:

means for receiving, at a user equipment, broadcast information transmitted through a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein a target rate at which the broadcast information is received is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

means for processing the broadcast information to identify candidate cells for communication with the user equipment.

37. The wireless communications system of claim 36, wherein the target rate is a target data rate.

38. The wireless communications system of claim 36, wherein the target rate is a target repetition rate.

39. The wireless communications system of claim 36, wherein the means for receiving the broadcast information comprise:

means for receiving the broadcast information at the target rate through the broadcast channel of the flexible bandwidth carrier system and through an additional broadcast channel of the flexible bandwidth carrier system.

40. The wireless communications system of claim 36, wherein the means for receiving the broadcast information comprise:

means for receiving one or more of signal strength information for access, service provider information, and neighboring cells information.

41. The wireless communications system of claim 36, wherein the means for receiving the broadcast information comprise:

means for receiving a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system, wherein information blocks are mapped to radio frames in the radio frame cycle based on the target rate and a duration of the radio frames is based on the bandwidth scaling factor.

42. The wireless communications system of claim 41, wherein the information blocks comprise at least one system information block (SIB).

43. The wireless communications system of claim 41, wherein the information blocks comprise at least one master information block (MIB).

44. The wireless communications system of claim 36, wherein the means for receiving the broadcast information comprise:

means for receiving the broadcast information at the target rate based on a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

45. A wireless communications device, comprising:

at least one processor communicatively coupled with a memory, the memory comprising executable code that, when executed by the at least one processor, causes the at least one processor to;

identify a target rate for a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein the target rate is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

transmit broadcast information of the flexible bandwidth carrier system using the target rate.

46. The wireless communications device of claim 45, wherein the target rate is a target data rate.

47. The wireless communications device of claim 45, wherein the target rate is a target repetition rate.

48. The wireless communications device of claim 45, wherein the executable code causes the at least one processor to:

add an additional broadcast channel of the flexible bandwidth carrier system; and

transmit the broadcast information through both broadcast channels of the flexible bandwidth carrier system using the target rate.

49. The wireless communications device of claim 45, wherein:

the target rate is an information data rate, and

the information data rate is substantially the same as the rate for the broadcast channel of the normal bandwidth carrier system.

50. The wireless communications device of claim 45, wherein the executable code causes the at least one processor to:

utilize a location of each information block transmitted in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate.

51. The wireless communications device of claim 50, wherein the executable code causes the at least one processor to:

schedule the location of each information block in the radio frame cycle.

52. The wireless communications device of claim 51, wherein the information block is a system information block (SIB).

53. The wireless communications device of claim 51, wherein the information block is a master information block (MIB).

54. The wireless communications device of claim 45, wherein the executable code causes the at least one processor to:

map information blocks to radio frames in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein a duration of the radio frames is based on the bandwidth scaling factor.

55. The wireless communications device of claim 45, wherein the executable code causes the at least one processor to:

utilize a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

56. The wireless communications device of claim 45, wherein the broadcast information includes one or more of signal strength information for access, service provider information, and neighboring cells information.

57. The wireless communications device of claim 45, wherein the bandwidth scaling factor is an integer value or a rational value.

58. A wireless communications device, comprising:

at least one processor communicatively coupled with a memory, the memory comprising executable code that, when executed by the at least one processor, causes the wireless communications device to;

receive broadcast information transmitted through a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein a target rate at which the broadcast information is received is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

process the broadcast information to identify candidate cells for communication with the user equipment.

59. The wireless communications device of claim 58, wherein the target rate is a target data rate.

60. The wireless communications device of claim 58, wherein the target rate is a target repetition rate.

61. The wireless communications device of claim 58, wherein the executable code causes the wireless communications device to:

receive the broadcast information at the target rate through the broadcast channel of the flexible bandwidth carrier system and through an additional broadcast channel of the flexible bandwidth carrier system.

62. The wireless communications device of claim 58, wherein the executable code causes the wireless communications device to:

receive, through the broadcast information, one or more of signal strength information for access, service provider information, and neighboring cells information.

63. The wireless communications device of claim 58, wherein the executable code causes the wireless communications device to:

receive, through the broadcast information, a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system, wherein information blocks are mapped to radio frames in the radio frame cycle based on the target rate and a duration of the radio frames is based on the bandwidth scaling factor.

64. The wireless communications device of claim 63, wherein the information blocks comprise at least one system information block (SIB).

65. The wireless communications device of claim 63, wherein the information blocks comprise at least one master information block (MIB).

66. The wireless communications device of claim 58, wherein the executable code causes the wireless communications device to:

receive the broadcast information at the target rate based on a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

67. A computer program product for data communication, comprising:

a non-transitory computer-readable medium comprising;

code configured to identify a target rate for a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein the target rate is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

code configured to transmit broadcast information of the flexible bandwidth carrier system using the target rate.

68. The computer program product of claim 67, wherein the target rate is a target date rate.

69. The computer program product of claim 67, wherein the target rate is a target repetition rate.

70. The computer program product of claim 67, wherein the non-transitory computer-readable medium comprises:

code configured to add an additional broadcast channel of the flexible bandwidth carrier system; and

code configured to transmit the broadcast information through both broadcast channels of the flexible bandwidth carrier system using the target rate.

71. The computer program product of claim 67, wherein:

the target rate is an information data rate, and

the information data rate is substantially the same as the rate for the broadcast channel of the normal bandwidth carrier system.

72. The computer program product of claim 67, wherein the non-transitory computer-readable medium comprises:

code configured to utilize a location of each information block transmitted in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate.

73. The computer program product of claim 72, wherein the non-transitory computer-readable medium comprises:

code configured to schedule the location of each information block in the radio frame cycle.

74. The computer program product of claim 73, wherein the information block is a system information block (SIB).

75. The computer program product of claim 73, wherein the information block is a master information block (MIB).

76. The computer program product of claim 67, wherein the non-transitory computer-readable medium comprises:

code configured to map information blocks to radio frames in a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein a duration of the radio frames is based on the bandwidth scaling factor.

77. The computer program product of claim 67, wherein the non-transitory computer-readable medium comprises:

code configured to utilize a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system to facilitate transmitting the broadcast information using the target rate, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.

78. The computer program product of claim 67, wherein the broadcast information includes one or more of signal strength information for access, service provider information, and neighboring cells information.

79. The computer program product of claim 67, wherein the bandwidth scaling factor is an integer value or a rational value.

80. A computer program product for data communication, comprising:

a non-transitory computer-readable medium comprising;

code configured to receive, at a user equipment, broadcast information transmitted through a broadcast channel of a flexible bandwidth carrier system that employs time dilation by dilating a transmission time interval (TTI) of the flexible bandwidth carrier with respect to a normal bandwidth carrier system, wherein a target rate at which the broadcast information is received is higher than a scaled rate for the broadcast channel, the scaled rate being a rate for a broadcast channel of the normal bandwidth carrier system scaled by a bandwidth scaling factor that corresponds to the flexible bandwidth carrier system; and

code configured to process the broadcast information to identify candidate cells for communication with the user equipment.

81. The computer program product of claim 80, wherein the target rate is a target data rate.

82. The computer program product of claim 80, wherein the target rate is a target repetition rate.

83. The computer program product of claim 80, wherein the non-transitory computer-readable medium comprises:

code configured to receive the broadcast information at the target rate through the broadcast channel of the flexible bandwidth carrier system and through an additional broadcast channel of the flexible bandwidth carrier system.

84. The computer program product of claim 80, wherein the non-transitory computer-readable medium comprises:

code configured to receive, through the broadcast information, one or more of signal strength information for access, service provider information, and neighboring cells information.

85. The computer program product of claim 80, wherein the non-transitory computer-readable medium comprises:

code configured to receive, through the broadcast information, a radio frame cycle for the broadcast channel of the flexible bandwidth carrier system, wherein information blocks are mapped to radio frames in the radio frame cycle based on the target rate and a duration of the radio frames is based on the bandwidth scaling factor.

86. The computer program product of claim 85, wherein the information blocks comprise at least one system information block (SIB).

87. The computer program product of claim 85, wherein the information blocks comprise at least one master information block (MIB).

88. The computer program product of claim 80, wherein the non-transitory computer-readable medium comprises:

code configured to receive the broadcast information at the target rate based on a scaled spreading factor with respect to one or more Primary Common Control Physical Channels (PCCPCHs) for the broadcast channel of the flexible bandwidth carrier system, wherein the scaled spreading factor is scaled by the bandwidth scaling factor or by a fraction of the bandwidth scaling factor.