Beacons for tiered sharing of spectrum

• US 10,154,485 B2
• Filed: 09/18/2015
• Issued: 12/11/2018
• Est. Priority Date: 03/24/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Abraham, Santosh Paul, Bhushan, Naga
• Primary Examiner(s): Beharry, Noel R
• Assistant Examiner(s): Mak, Rodrick
• Application Number:
  US14/858,779
• Publication Number:
  US 20160286549A1
• Time in Patent Office: 1,180 Days
• Field of Search: None
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 40/244 using a network of reference devices, e.g. beaconing
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 74/002 Transmission of channel access control information

Abstract

Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to beacons for shared spectrum operation among multiple tiers of users. For example, a method for wireless communication is provided that includes generating, with a second tier wireless communication device of a network operating in a shared spectrum, a beacon that includes a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including data about the network; and transmitting, from the second tier wireless communication device of the network, the beacon during a time slot of a sub-frame such that communications over the shared spectrum are coordinated based on the beacon.

Claims

1. A method for wireless communication, comprising:

generating, with a second tier wireless communication device of a network operating in a shared spectrum, a beacon that includes a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices; and

transmitting, from the second tier wireless communication device of the network during a time slot of a sub-frame based on a predetermined schedule, the beacon including the enablement signal to instruct the other wireless communication devices of the second tier or the lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices; and

coordinating, by the second tier wireless communication device of the network with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the transmitted beacon.

2. The method of claim 1, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

3. The method of claim 1, wherein the transmitting the beacon includes transmitting the beacon on all available bands of the network or on only a subset of available bands of the network.

4. The method of claim 1, further comprising:

periodically transmitting, from the second tier wireless communication device of the network, additional beacons at a beacon interval.

5. The method of claim 4, wherein the periodically transmitting the additional beacons includes transmitting over different bands of available bands of the network over time.

6. The method of claim 1, wherein the beacon is 500 μ

s or less.

7. The method of claim 6, wherein the beacon occupies only a portion of the time slot of the sub-frame to allow for switching, within the sub-frame, prior to and after transmission of the beacon.

8. The method of claim 1, further comprising repeatedly transmitting, from the second tier wireless communication device of the network, the beacon in consecutive time periods during a predetermined time period to define a long beacon.

9. The method of claim 8, wherein the predetermined time period exceeds a maximum on-time of a third tier wireless communication device, and wherein the second tier wireless communication device and the third tier wireless communication device are associated with different tiers of multiple tiers.

10. The method of claim 1, further comprising:

upon network start up, repeatedly transmitting, from the second tier wireless communication device of the network, a start-up beacon for a predetermined time period.

11. The method of claim 10, wherein the start-up beacon includes timing information for the transmission of the beacon during the time slot of the sub-frame.

12. A method for wireless communication, comprising:

receiving, at a wireless communication device, a beacon from a second tier wireless communication device of a network operating in a shared spectrum during a time slot of a sub-frame based on a predetermined schedule, the beacon including a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices, the wireless communication device is of the second tier or the lower tier; and

coordinating, by the wireless communication device with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the received beacon.

13. The method of claim 12, wherein information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

14. The method of claim 12, further comprising at least one of:

scanning all available bands of the network for the beacon;

or

scanning only a subset of all available bands of the network for the beacon.

15. The method of claim 12, wherein the beacon is 500 μ

s or less.

16. The method of claim 15, wherein the beacon occupies only a portion of the time slot of the sub-frame.

17. The method of claim 12, further comprising:

periodically receiving, from the second tier wireless communication device of the network, additional beacons at a beacon interval; and

coordinating, by the wireless communication device, communications over the shared spectrum based on the additional beacons.

18. The method of claim 12, wherein the wireless communication device is a third tier device and wherein the coordinating communications includes transmitting data during an available third tier time frame.

19. The method of claim 18, further comprising identifying the available third tier time frame based on a third tier enablement signal included in the beacon.

20. The method of claim 18, further comprising identifying the available third tier time frame based on a second tier reservation time included in the beacon, the available third tier time frame being outside of the second tier reservation time.

21. The method of claim 12, wherein the wireless communication device is a second tier device and wherein the coordinating communications includes transmitting data during an available second tier time frame.

22. The method of claim 21, further comprising identifying the available second tier time frame based on a second tier enablement signal included in the beacon.

23. The method of claim 21, further comprising identifying the available second tier time frame based on a second tier reservation time included in the beacon, the available second tier time frame being within the second tier reservation time.

24. The method of claim 12, further comprising:

decoding, by the wireless communication device, the STF to detect second tier wireless communication activity;

decoding, by the wireless communication device, the LTF to estimate a channel of the second tier wireless communication activity; and

wherein the coordinating communications over the shared spectrum includes avoiding the estimated channel of the second tier wireless communication activity.

25. A wireless communication device, comprising:

at least one processor;

a memory coupled to the at least one processor;

wherein the at least one processor is configured to;

generate a beacon that includes a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of a second tier or a lower tier as to when communications are allowed over a shared spectrum in a network by the other wireless communication devices, the wireless communication device being of the second tier; and

transmit, by a transmitter of the wireless communication device during a time slot of a sub-frame based on a predetermined schedule, the beacon including the enablement signal to instruct the other wireless communication devices of the second tier or the lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices, and

wherein the processor is further configured to coordinate, with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the transmitted beacon.

26. The device of claim 25, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

27. The device of claim 25, wherein the beacon is transmitted, by the transmitter, on all available bands of the network or on only a subset of available bands of the network.

28. The device of claim 25, wherein the processor is further configured to periodically transmit additional beacons at a beacon interval.

29. The device of claim 28, wherein the additional beacons are periodically transmitted over different bands of available bands of the network over time.

30. The device of claim 25, wherein the beacon is 500 μ

s or less.

31. The device of claim 25, wherein the beacon occupies only a portion of the time slot of the sub-frame to allow for switching, within the sub-frame, prior to and after transmission of the beacon.

32. The device of claim 25, wherein the processor is further configured to repeatedly transmit the beacon in consecutive time periods during a predetermined time period to define a long beacon.

33. The device of claim 32, wherein the predetermined time period exceeds a maximum on-time of a third tier wireless communication device, and wherein the device and the third tier wireless communication device are associated with different tiers of multiple tiers.

34. The device of claim 25, wherein the processor is further configured to repeatedly transmit a start-up beacon for a predetermined time period upon network start up.

35. The device of claim 34, wherein the start-up beacon includes timing information for the transmission of the beacon during the time slot of the sub-frame.

36. A wireless communication device, comprising:

a receiver that receives a beacon from a second tier wireless communication device of a network operating in a shared spectrum during a time slot of a sub-frame based on a predetermined schedule, the beacon including a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices, the wireless communication device is of the second tier or the lower tier;

at least one processor in communication with the receiver; and

a memory coupled to the at least one processor;

wherein the at least one processor is configured to;

coordinate, with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the beacon received by the receiver.

37. The device of claim 36, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

38. The device of claim 36, wherein the receiver scans all available bands of the network for the beacon or scans only a subset of all available bands of the network for the beacon.

39. The device of claim 36, wherein the beacon is 500 μ

s or less.

40. The device of claim 39, wherein the beacon occupies only a portion of the time slot of the sub-frame.

41. The device of claim 36, wherein the receiver periodically receives, from the second tier wireless communication device of the network, additional beacons at a beacon interval;

and

wherein the processor is further configured to coordinate communications over the shared spectrum based on the additional beacons.

42. The device of claim 36, further comprising a transmitter that transmits data during an available third tier time frame based on the coordination of communications by the processor.

43. The device of claim 42, wherein the processor is further configured to identify the available third tier time frame based on a third tier enablement signal included in the beacon.

44. The device of claim 42, wherein the processor is further configured to identify the available third tier time frame based on a second tier reservation time included in the beacon, the available third tier time frame being outside of the second tier reservation time.

45. The device of claim 36, further comprising a transmitter that transmits data during an available second tier time frame based on the coordination of communications by the processor.

46. The device of claim 45, wherein the processor is further configured to identify the available second tier time frame based on a second tier enablement signal included in the beacon.

47. The device of claim 45, wherein the processor is further configured to identify the available second tier time frame based on a second tier reservation time included in the beacon, the available second tier time frame being within the second tier reservation time.

48. The device of claim 36, wherein the processor is further configured to:

decode the STF to detect second tier wireless communication activity; and

decode the LTF to estimate a channel of the second tier wireless communication activity; and

wherein the processor coordinates communications over the shared spectrum by avoiding the estimated channel of the second tier wireless communication activity.

49. A wireless communication device, comprising:

means for generating, with a second tier wireless communication device of a network operating in a shared spectrum, a beacon that includes a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices; and

means for transmitting, from the second tier wireless communication device of the network during a time slot of a sub-frame based on a predetermined schedule, the beacon including the enablement signal to instruct the other wireless communication devices of the second tier or the lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices; and

means for coordinating, with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the transmitted beacon.

50. The device of claim 49, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

51. The device of claim 49, wherein the means for transmitting the beacon transmits the beacon on all available bands of the network or on only a subset of available bands of the network.

52. The device of claim 49, further comprising:

means for periodically transmitting, from the second tier wireless communication device of the network, additional beacons at a beacon interval.

53. The device of claim 52, wherein the means for periodically transmitting the additional beacons transmits over different bands of available bands of the network over time.

54. The device of claim 49, further comprising means for constructing a long beacon by repeatedly transmitting, from the second tier wireless communication device of the network, the beacon in consecutive time periods during a predetermined time period to define a long beacon.

55. A wireless communication device, comprising:

means for receiving, at a wireless communication device, a beacon from a second tier wireless communication device of a network operating in a shared spectrum during a time slot of a sub-frame based on a predetermined schedule, the beacon including a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices, the wireless communication device is of the second tier or the lower tier; and

means for coordinating, by the wireless communication device with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the received beacon.

56. The device of claim 55, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

57. The device of claim 55, further comprising means for scanning all available bands of the network for the beacon or scanning only a subset of all available bands of the network for the beacon.

58. The device of claim 55, further comprising:

means for periodically receiving, from the second tier wireless communication device of the network, additional beacons at a beacon interval; and

means for coordinating communications over the shared spectrum based on the additional beacons.

59. The device of claim 55, further comprising:

means for decoding the STF to detect second tier wireless communication activity; and

means for decoding the LTF to estimate a channel of the second tier wireless communication activity;

wherein the means for coordinating communications over the shared spectrum avoids the estimated channel of the second tier wireless communication activity.

60. A non-transitory computer readable medium having program code recorded thereon, the program code comprising:

code for causing a computer to generate a beacon that includes a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over a shared spectrum in a network by the other wireless communication devices, the computer associated with a second tier; and

code for causing the computer to transmit, during a time slot of a sub-frame based on a predetermined schedule, the beacon including the enablement signal to instruct the other wireless communication devices of the second tier or the lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices; and

code for causing the computer to coordinate, with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the transmitted beacon.

61. The non-transitory computer readable medium of claim 60, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

62. The non-transitory computer readable medium of claim 60, wherein the code for causing the computer to transmit the beacon causes the beacon to be transmitted on all available bands of the network or on only a subset of available bands of the network.

63. The non-transitory computer readable medium of claim 60, further comprising:

code for causing the computer to periodically transmit additional beacons at a beacon interval.

64. The non-transitory computer readable medium of claim 63, wherein the code for causing the computer to periodically transmit the additional beacons causes the additional beacons to be transmitted over different bands of available bands of the network over time.

65. The non-transitory computer readable medium of claim 60, further comprising code for causing the computer to repeatedly transmit the beacon in consecutive time periods during a predetermined time period to define a long beacon.

66. A non-transitory computer readable medium having program code recorded thereon, the program code comprising:

code for causing a computer to receive a beacon from a second tier wireless communication device of a network operating in a shared spectrum during a time slot of a sub-frame based on a predetermined schedule, the beacon including a short training field (STF), a long training field (LTF), and a beacon information field, the beacon information field including an enablement signal instructing other wireless communication devices of the second tier or a lower tier as to when communications are allowed over the shared spectrum by the other wireless communication devices, the computer being of the second tier or the lower tier; and

code for causing the computer to coordinate, with the other wireless communication device of the second tier and the lower tier, communications over the shared spectrum using the received beacon.

67. The non-transitory computer readable medium of claim 66, wherein the information included in the beacon information field includes one or more of a network identifier, an indication of occupied network bands, a second tier shared spectrum access enablement signal, a third tier shared spectrum access enablement signal, a second tier reservation time for the shared spectrum, a third tier reservation time for the shared spectrum, a shared spectrum access shutdown signal, and/or a beacon interval.

68. The non-transitory computer readable medium of claim 66, further comprising at least one of:

code for causing the computer to scan all available bands of the network for the beacon;

or

code for causing the computer to scan only a subset of all available bands of the network for the beacon.

69. The non-transitory computer readable medium of claim 66, further comprising:

code for causing the computer to periodically receive, from the second tier wireless communication device of the network, additional beacons at a beacon interval; and

code for causing the computer to coordinate communications over the shared spectrum based on the additional beacons.

70. The non-transitory computer readable medium of claim 66, further comprising:

code for causing the computer to decode the STF to detect second tier wireless communication activity;

code for causing the computer to decode the LTF to estimate a channel of the second tier wireless communication activity; and

code for causing the computer to avoid the estimated channel of the second tier wireless communication activity.