Systems and methods for reducing collisions after traffic indication map paging

• US 8,902,803 B2
• Filed: 01/23/2013
• Issued: 12/02/2014
• Est. Priority Date: 03/05/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Asterjadhi, Alfred, Merlin, Simone, Wentink, Maarten Menzo, Abraham, Santosh Paul, Quan, Zhi
• Primary Examiner(s): Wu, Jianye
• Application Number:
  US13/747,759
• Publication Number:
  US 20130229963A1
• Time in Patent Office: 678 Days
• Field of Search: None
• US Class Current: 370/311
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 68/025 Indirect paging
• CPC Class Codes: H04W 74/085 collision avoidance
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Systems, methods, and devices for reducing collisions in a wireless communications network are described herein. In some aspects, a receiver receives a paging message. The paging message includes an ordering and a multiplier. A processor determines a first wake-up time based on the ordering and the multiplier. The wireless device wakes up at the determined wake-up time. The wireless device receives data via the receiver.

Claims

1. A method for reducing collisions in a wireless communications network, the method comprising:

receiving, at a wireless device, a paging message comprising an ordering and a multiplier;

determining a first wake-up time based on the ordering and the multiplier;

waking up at the determined wake-up time; and

receiving data.

2. The method of claim 1, wherein the multiplier indicates a multiple of time units comprising a ratio between a time during two consecutive TIM frames and a number of stations indicated in the first TIM frame of the two consecutive TIM frames.

3. The method of claim 1, wherein the multiplier indicates a multiple of time units comprising a ratio between a data delivery period and a number of stations indicated in the TIM frame.

4. The method of claim 1, wherein the ordering is based on a hash of a station identifier.

5. The method of claim 1, wherein the ordering is based one or more most significant bits of a station identifier.

6. The method of claim 1, further comprising transmitting a request for the data.

7. The method of claim 6, further comprising:

determining a second wake-up time;

waking up at the determined second wake-up time; and

receiving an acknowledgement to the request for data,

wherein the second wake-up time is earlier than the first wake-up time.

8. The method of claim 7, wherein the acknowledgement comprises a cumulative acknowledgement.

9. The method of claim 7, wherein determining the first wake-up time comprises determining the first wake-up time based on the acknowledgement.

10. The method of claim 7, wherein determining the first wake-up time comprises determining the first wake-up time based on the ordering and the multiplier.

11. The method of claim 7, wherein the request for data comprises the determined first wake-up time.

12. The method of claim 7, wherein the second wake-up time is during a contention period, and the first wake-up time is during a data delivery period.

13. The method of claim 12, further comprising setting a network allocation vector during the contention period.

14. The method of claim 13, further comprising determining to ignore the network allocation vector set during the contention period.

15. The method in claim 14, wherein ignoring the network allocation vector is based on an indication in the TIM paging.

16. The method of claim 1, further comprising transmitting an acknowledgement of the data.

17. The method of claim 1, further comprising waiting a back-off period.

18. The method of claim 1, further comprising transmitting an operating mode selection.

19. A wireless device configured to reduce collisions in a wireless communications network, the wireless device comprising:

a receiver configured to receive a paging message comprising an ordering and a multiplier;

a processor configured to;

determine a first wake-up time based on the ordering and the multiplier;

wake up at the determined wake-up time; and

receive data.

20. The wireless device of claim 19, wherein the multiplier indicates a multiple of time units comprising a ratio between a time during two consecutive TIM frames and a number of stations indicated in the first TIM frame of the two consecutive TIM frames.

21. The wireless device of claim 19, wherein the multiplier indicates a multiple of time units comprising a ratio between a data delivery period and a number of stations indicated in the TIM frame.

22. The wireless device of claim 19, wherein the ordering is based on a hash of a station identifier.

23. The wireless device of claim 19, wherein the ordering is based one or more most significant bits of a station identifier.

24. The wireless device of claim 19, further comprising a transmitter configured to transmit a request for the data.

25. The wireless device of claim 24, wherein the processor is further configured to:

determine a second wake-up time; and

wake up at the determined second wake-up time,

wherein the receiver is further configured to receive an acknowledgement to the request for data, and

the second wake-up time is earlier than the first wake-up time.

26. The wireless device of claim 25, wherein the acknowledgement comprises a cumulative acknowledgement.

27. The wireless device of claim 25, wherein the processor is configured to determine the first wake-up time based on the acknowledgement.

28. The wireless device of claim 25, wherein the processor is configured to determine the first wake-up time based on the ordering and the multiplier.

29. The wireless device of claim 25, wherein the request for data comprises the determined first wake-up time.

30. The wireless device of claim 25, wherein the second wake-up time is during a contention period, and the first wake-up time is during a data delivery period.

31. The wireless device of claim 30, wherein the receiver is configured to receive a network allocation vector during the contention period.

32. The wireless device of claim 31, wherein the processor is configured to determine to ignore the network allocation vector set during the contention period.

33. The wireless device in claim 32, wherein ignoring the network allocation vector is based on an indication in the TIM paging.

34. The wireless device of claim 19, further comprising a transmitter configured to transmit an acknowledgement of the data.

35. The wireless device of claim 19, wherein the processor is further configured to wait a back-off period.

36. The wireless device of claim 19, further comprising a transmitter configured to transmit an operating mode selection.

37. An apparatus for reducing collisions in a wireless communications network,

the apparatus comprising:

means for receiving a paging message comprising an ordering and a multiplier;

means for determining a first wake-up time based on the ordering and the multiplier;

means for waking up at the determined wake-up time; and

means for receiving data.

38. The apparatus of claim 37, wherein the multiplier indicates a multiple of time units comprising a ratio between a time during two consecutive TIM frames and a number of stations indicated in the first TIM frame of the two consecutive TIM frames.

39. The apparatus of claim 37, wherein the multiplier indicates a multiple of time units comprising a ratio between a data delivery period and a number of stations indicated in the TIM frame.

40. The apparatus of claim 37, wherein the ordering is based on a hash of a station identifier.

41. The apparatus of claim 37, wherein the ordering is based one or more most significant bits of a station identifier.

42. The apparatus of claim 37, further comprising means for transmitting a request for the data.

43. The apparatus of claim 42, further comprising:

means for determining a second wake-up time;

means for waking up at the determined second wake-up time; and

means for receiving an acknowledgement to the request for data,

wherein the second wake-up time is earlier than the first wake-up time.

44. The apparatus of claim 43, wherein the acknowledgement comprises a cumulative acknowledgement.

45. The apparatus of claim 43, wherein means for determining the first wake-up time comprises means for determining the first wake-up time based on the acknowledgement.

46. The apparatus of claim 43, wherein means for determining the first wake-up time comprises means for determining the first wake-up time based on the ordering and the multiplier.

47. The apparatus of claim 43, wherein the request for data comprises the determined first wake-up time.

48. The apparatus of claim 43, wherein the second wake-up time is during a contention period, and the first wake-up time is during a data delivery period.

49. The apparatus of claim 48, further comprising means for setting a network allocation vector during the contention period.

50. The apparatus of claim 49, further comprising means for determining to ignore the network allocation vector set during the contention period.

51. The apparatus in claim 50, wherein ignoring the network allocation vector is based on an indication in the TIM paging.

52. The apparatus of claim 37, further comprising means for transmitting an acknowledgement of the data.

53. The apparatus of claim 37, further comprising means for waiting a back-off period.

54. The apparatus of claim 37, further comprising means for transmitting an operating mode selection.

55. A non-transitory computer-readable medium comprising code that, when executed by one or more processors, causes an apparatus to:

receive a paging message comprising an ordering and a multiplier;

determine a first wake-up time based on the ordering and the multiplier;

wake up at the determined wake-up time; and

receive data.

56. The medium of claim 55, wherein the multiplier indicates a multiple of time units comprising a ratio between a time during two consecutive TIM frames and a number of stations indicated in the first TIM frame of the two consecutive TIM frames.

57. The medium of claim 55, wherein the multiplier indicates a multiple of time units comprising a ratio between a data delivery period and a number of stations indicated in the TIM frame.

58. The medium of claim 55, wherein the ordering is based on a hash of a station identifier.

59. The medium of claim 55, wherein the ordering is based one or more most significant bits of a station identifier.

60. The medium of claim 55, further comprising code that, when executed by one or more processors, causes the apparatus to transmit a request for the data.

61. The medium of claim 60, further comprising code that, when executed by one or more processors, causes the apparatus to:

determine a second wake-up time;

wake up at the determined second wake-up time; and

receive an acknowledgement to the request for data,

wherein the second wake-up time is earlier than the first wake-up time.

62. The medium of claim 61, wherein the acknowledgement comprises a cumulative acknowledgement.

63. The medium of claim 61, further comprising code that, when executed by one or more processors, causes the apparatus to determine the first wake-up time based on the acknowledgement.

64. The medium of claim 61, further comprising code that, when executed by one or more processors, causes the apparatus to determine the first wake-up time based on the ordering and the multiplier.

65. The medium of claim 61, wherein the request for data comprises the determined first wake-up time.

66. The medium of claim 61, wherein the second wake-up time is during a contention period, and the first wake-up time is during a data delivery period.

67. The medium of claim 66, further comprising code that, when executed by one or more processors, causes the apparatus to set a network allocation vector during the contention period.

68. The medium of claim 67, further comprising code that, when executed by one or more processors, causes the apparatus to determine to ignore the network allocation vector set during the contention period.

69. The medium in claim 68, wherein ignoring the network allocation vector is based on an indication in the TIM paging.

70. The medium of claim 55, further comprising further comprising code that, when executed by one or more processors, causes the apparatus to transmit an acknowledgement of the data.

71. The medium of claim 55, further comprising code that, when executed by one or more processors, causes the apparatus to wait a back-off period.

72. The medium of claim 55, further comprising code that, when executed by one or more processors, causes the apparatus to transmit an operating mode selection.