METHODS AND SYSTEMS FOR FREQUENCY MULTIPLEXED COMMUNICATION IN DENSE WIRELESS ENVIRONMENTS

• US 20140328236A1
• Filed: 04/29/2014
• Published: 11/06/2014
• Est. Priority Date: 05/03/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Merlin, Simone, Barriac, Gwendolyn Denise, Sampath, Hemanth, Vermani, Sameer, Tian, Bin, Zhou, Yan, Tandra, Rahul
• Granted Patent: US 9,608,796 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04B 7/26 at least one of which is mobile
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04J 1/02 Details
• CPC Class Codes: H04J 1/14 Arrangements providing for calling or supervisory signals
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0069 Allocation based on distance or geographical location allocation based on terminal or device properties in general, H04W72/51
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 52/0212 managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 74/02 : Hybrid access
• CPC Class Codes: H04W 74/0816 : with collision avoidance
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device. The method further includes transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use. The first communication is concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

Claims

1. A method of high-efficiency wireless frequency division multiplexing, comprising:

receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device; and

transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use,

the first communication being concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

2. The method of claim 1, further comprising transmitting the reference signal in response to reception of a ready-to-send (RTX) frame at the access point, the reference signal comprising a ready-to-send (RTX) frame comprising one or more of:

a frame control field, a duration field, a source address field, a destination address field, and an information payload comprising one or more of the following indications;

a requested transmission time, the size of the queues for transmission, a quality-of-service (QoS) indication for the requested transmission, and a requested transmission bandwidth.

3. The method of claim 1, the reference signal comprising a ready-to-send (RTX) frame comprising a frame including a high throughput control (HTC) field with an indication reverse decision grant (RDG)=1.

4. The method of claim 1, the reference signal comprising a frame including a high throughput control (HTC) field with an indication reverse decision grant (RDG)=1.

5. The method of claim 1, the reference signal comprising at least a portion of a power save multi-poll (PSMP) frame, a PSMP-UTT start offset within a STA info field identifying the start time for uplink frequency division multiple access (UL FDMA) transmissions, a PSMP-UTT duration identifies the duration of the UL FDMA transmission, and a STA ID field comprising an identifier of STAs allowed to transmit.

6. The method of claim 1, the reference signal comprising a frame control field, a duration field, a receive address field, a transmit address field, a length field, a STA info field, one or more optional padding bits, and a frame check sequence (FCS).

7. The method of claim 1, further comprising receiving an indication of the first subset of wireless frequencies from the access point.

8. The method of claim 1, further comprising receiving an indication of the first set of wireless frequencies from one or more devices not associated with the access point.

9. The method of claim 1, further comprising detecting an interference level on one or more wireless frequencies and determining the first subset of wireless frequencies based on the interference level.

10. The method of claim 1, further comprising determining the first subset of wireless frequencies based on a tone interleaved channel with frequency hopping.

11. The method of claim 1, further comprising transmitting an indication of the first subset of wireless frequencies to the access point.

12. The method of claim 1, further comprising transmitting an indication of the first set of wireless frequencies to one or more devices not associated with the access point.

13. The method of claim 1, the reference signal comprising an indication of a deferral time for third party devices.

14. The method of claim 1, the reference signal comprising an indication of devices that are eligible to transmit at a particular time.

15. The method of claim 1, the reference signal comprising an indication of a power level at which at least one device should transmit.

16. The method of claim 1, the reference signal comprising an assignment of channels to at least the first wireless device device.

17. The method of claim 1, the reference signal comprising an indication of a transmission time of at least the first wireless device device.

18. The method of claim 1, the reference signal comprising a clear-to-send frame (CTS).

19. The method of claim 1, the reference signal comprising a clear-to-send frame (CTS) and an extended payload comprising one or more payload elements.

20. The method of claim 1, the reference signal comprising a clear-to-send frame (CTS) comprising a high-throughput control (HTC) field indicating one or more target devices.

21. The method of claim 1, the reference signal comprising an aggregated media access control protocol data unit (A-MPDU) comprising a clear-to-send frame (CTS) and one or more payload elements.

22. The method of claim 1, further comprising transmitting to the access point a quality-of-service (QoS) field indicating that the first device is ready to send data.

23. The method of claim 1, further comprising transmitting to the access point a power-save poll (PS-Poll) frame indicating that the first device is ready to send data.

24. The method of claim 1, wherein the first subset of wireless frequencies comprises a 20 or 40 or 80 MHz channel according to an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard.

25. The method of claim 1, wherein the first and second subset of wireless frequencies are within an operating bandwidth of the access point.

26. The method of claim 1, wherein the first and second communications start at the same time indicated by the reference signal, within a margin of transmission time error.

27. The method of claim 1, wherein the first and second communications start at different times.

28. The method of claim 1, wherein the first and second communications end at the same time indicated by the reference signal, within a margin of transmission time error.

29. The method of claim 1, wherein the first and second communications end at different times.

30. The method of claim 1, the reference signal being sent by the access point according to a sense multiple access (CSMA) mechanism.

31. The method of claim 1, the reference signal being sent by the access point at a time previously scheduled with at least the first device via management signaling.

32. The method of claim 1, the reference signal comprising management signaling indicating one or more future times of joint transmission.

33. The method of claim 1, wherein the reference signal is sent at least on a primary channel.

34. The method of claim 1, wherein the reference signal is sent on a primary channel and on all or a portion of secondary channels that are idle for a sensing time before the transmission.

35. The method of claim 1, wherein the reference signal is sent on channels compatible with the first and second devices.

36. The method of claim 1, wherein at least the first device indicates to the access point a channel use capability.

37. The method of claim 1, wherein the reference signal is sent on idle channels only.

38. The method of claim 1, wherein reference signal is sent on a primary channel only, with an indication that only idle channels are to be used.

39. A first wireless device configured to perform high-efficiency wireless frequency division multiplexing, comprising:

a receiver configured to receive a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device; and

a transmitter configured to transmit a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use,

the first communication being concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

40. The device of claim 39, the transmitter being further configured to transmit the reference signal in response to reception of a ready-to-send (RTX) frame at the access point, the reference signal comprising a ready-to-send (RTX) frame comprising one or more of:

a frame control field, a duration field, a source address field, a destination address field, and an information payload comprising one or more of the following indications;

a requested transmission time, the size of the queues for transmission, a quality-of-service (QoS) indication for the requested transmission, and a requested transmission bandwidth.

41. The device of claim 39, the reference signal comprising a ready-to-send (RTX) frame comprising a frame including a high throughput control (HTC) field with an indication reverse decision grant (RDG)=1.

42. The device of claim 39, the reference signal comprising a frame including a high throughput control (HTC) field with an indication reverse decision grant (RDG)=1.

43. The device of claim 39, the reference signal comprising at least a portion of a power save multi-poll (PSMP) frame, a PSMP-UTT start offset within a STA info field identifying the start time for uplink frequency division multiple access (UL FDMA) transmissions, a PSMP-UTT duration identifies the duration of the UL FDMA transmission, and a STA ID field comprising an identifier of STAs allowed to transmit.

44. The device of claim 39, the reference signal comprising a frame control field, a duration field, a receive address field, a transmit address field, a length field, a STA info field, one or more optional padding bits, and a frame check sequence (FCS).

45. The device of claim 39, the receiver being further configured to receive an indication of the first subset of wireless frequencies from the access point.

46. The device of claim 39, the receiver being further configured to receive an indication of the first set of wireless frequencies from one or more devices not associated with the access point.

47. The device of claim 39, further comprising a processor configured to detect an interference level on one or more wireless frequencies and determining the first subset of wireless frequencies based on the interference level.

48. The device of claim 39, further comprising a processor configured to determine the first subset of wireless frequencies based on a tone interleaved channel with frequency hopping.

49. The device of claim 39, the transmitter being further configured to transmit an indication of the first subset of wireless frequencies to the access point.

50. The device of claim 39, the transmitter being further configured to transmit an indication of the first set of wireless frequencies to one or more devices not associated with the access point.

51. The device of claim 39, the reference signal comprising an indication of a deferral time for third party devices.

52. The device of claim 39, the reference signal comprising an indication of devices that are eligible to transmit at a particular time.

53. The device of claim 39, the reference signal comprising an indication of a power level at which at least one device should transmit.

54. The device of claim 39, the reference signal comprising an assignment of channels to at least the first wireless device device.

55. The device of claim 39, the reference signal comprising an indication of a transmission time of at least the first wireless device device.

56. The device of claim 39, the reference signal comprising a clear-to-send frame (CTS).

57. The device of claim 39, the reference signal comprising a clear-to-send frame (CTS) and an extended payload comprising one or more payload elements.

58. The device of claim 39, the reference signal comprising a clear-to-send frame (CTS) comprising a high-throughput control (HTC) field indicating one or more target devices.

59. The device of claim 39, the reference signal comprising an aggregated media access control protocol data unit (A-MPDU) comprising a clear-to-send frame (CTS) and one or more payload elements.

60. The device of claim 39, the transmitter being further configured to transmit to the access point a quality-of-service (QoS) field indicating that the first device is ready to send data.

61. The device of claim 39, the transmitter being further configured to transmit to the access point a power-save poll (PS-Poll) frame indicating that the first device is ready to send data.

62. The device of claim 39, wherein the first subset of wireless frequencies comprises a 20 or 40 or 80 MHz channel according to an Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard.

63. The device of claim 39, wherein the first and second subset of wireless frequencies are within an operating bandwidth of the access point.

64. The device of claim 39, wherein the first and second communications start at the same time indicated by the reference signal, within a margin of transmission time error.

65. The device of claim 39, wherein the first and second communications start at different times.

66. The device of claim 39, wherein the first and second communications end at the same time indicated by the reference signal, within a margin of transmission time error.

67. The device of claim 39, wherein the first and second communications end at different times.

68. The device of claim 39, the reference signal being sent by the access point according to a sense multiple access (CSMA) mechanism.

69. The device of claim 39, the reference signal being sent by the access point at a time previously scheduled with at least the first device via management signaling.

70. The device of claim 39, the reference signal comprising management signaling indicating one or more future times of joint transmission.

71. The device of claim 39, wherein the reference signal is sent at least on a primary channel.

72. The device of claim 39, wherein the reference signal is sent on a primary channel and on all or a portion of secondary channels that are idle for a sensing time before the transmission.

73. The device of claim 39, wherein the reference signal is sent on channels compatible with the first and second devices.

74. The device of claim 39, wherein at least the first device indicates to the access point a channel use capability.

75. The device of claim 39, wherein the reference signal is sent on idle channels only.

76. The device of claim 39, wherein reference signal is sent on a primary channel only, with an indication that only idle channels are to be used.

77. An apparatus for high-efficiency wireless frequency division multiplexing, comprising:

means for receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device; and

means for transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use,

the first communication being concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.

78. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:

receive, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device; and

transmit a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use,

the first communication being concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset.