Uplink signal starting position in a wireless device and wireless network

1. A method comprising:

receiving, by a wireless device, one or more messages comprising configuration parameters of an unlicensed cell;

receiving downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;

generating one or more transport blocks based on the DCI; and

transmitting, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.

2. The method of claim 1 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

3. The method of claim 2 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

4. The method of claim 1 , wherein the LBT period is twenty-five micro-seconds.

5. The method of claim 1 , further comprising determining the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device.

6. The method of claim 1 , wherein the second field comprises two bits.

7. The method of claim 1 , further comprising, performing, by the wireless device, an LBT process for the LBT period.

8. The method of claim 1 , wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value.

9. The method of claim 1 , wherein the wireless device is configured to not transmit uplink signals via the unlicensed cell during a gap period before the starting position.

10. The method of claim 1 , further comprising receiving, by the wireless device, a full downlink subframe in a subframe preceding the uplink subframe.

11. The method of claim 1 , further comprising receiving, by the wireless device, a partial downlink subframe in a subframe preceding the uplink subframe.

12. The method of claim 1 , wherein the DCI is dedicated DCI.

13. The method of claim 1 , further comprising:

receiving, by the wireless device, a timing advance command comprising the timing advance value; and

adjusting uplink transmission timing for one or more uplink channels based on the timing advance value.

14. The method of claim 1 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

15. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive one or more messages comprising configuration parameters of an unlicensed cell;

receive downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;

generate one or more transport blocks based on the DCI; and

transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.

16. The wireless device of claim 15 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

17. The wireless device of claim 16 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with twenty-five micro-seconds plus at least one microsecond after the beginning of symbol zero of the uplink subframe; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

18. The wireless device of claim 15 , wherein the LBT period is twenty-five micro-seconds.

19. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device.

20. The wireless device of claim 15 , wherein the second field comprises two bits.

21. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to perform an LBT process for the LBT period.

22. The wireless device of claim 15 , wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value.

23. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to not transmit uplink signals via the unlicensed cell during a gap period before the starting position.

24. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a full downlink subframe in a subframe preceding the uplink subframe.

25. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a partial downlink subframe in a subframe preceding the uplink subframe.

26. The wireless device of claim 15 , wherein the DCI is dedicated DCI.

27. The wireless device of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:

receive a timing advance command comprising the timing advance value; and

adjust uplink transmission timing for one or more uplink channels based on the timing advance value.

28. The wireless device of claim 15 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

29. A method comprising:

transmitting, by a base station, one or more messages comprising configuration parameters of an unlicensed cell;

transmitting downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; and

receiving, via the uplink resources and based on the DCI, one or more transport blocks.

30. The method of claim 29 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

31. The method of claim 30 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

32. The method of claim 29 , wherein the LBT period is twenty-five micro-seconds.

33. The method of claim 29 , wherein the second field comprises two bits.

34. The method of claim 29 , further comprising transmitting, by the base station, a full downlink subframe in a subframe preceding the uplink subframe.

35. The method of claim 29 , wherein the DCI is dedicated DCI.

36. The method of claim 29 , further comprising transmitting, by the base station, a timing advance command comprising the timing advance value.

37. The method of claim 29 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

38. A base station comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the base station to:

transmit one or more messages comprising configuration parameters of an unlicensed cell;

transmit downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; and

receive, via the uplink resources and based on the DCI, one or more transport blocks.

39. The base station of claim 38 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

40. The base station of claim 39 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

41. The base station of claim 38 , wherein the LBT period is twenty-five micro-seconds.

42. The base station of claim 38 , wherein the second field comprises two bits.

43. The base station of claim 38 , wherein the instructions, when executed by the one or more processors, further cause the base station to transmit a full downlink subframe in a subframe preceding the uplink subframe.

44. The base station of claim 38 , wherein the DCI is dedicated DCI.

45. The base station of claim 38 , wherein the instructions, when executed by the one or more processors, further cause the base station to transmit a timing advance command comprising the timing advance value.

46. The base station of claim 38 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

47. A system comprising:

a base station; and

a wireless device;

wherein the base station is configured to:

transmit one or more messages comprising configuration parameters of an unlicensed cell; and

wherein the wireless device is configured to:

receive, from the base station, the one or more messages;

receive downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value; generate one or more transport blocks based on the DCI; and

transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.

48. The system of claim 47 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

49. The system of claim 48 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

50. The system of claim 47 , wherein the LBT period is twenty-five micro-seconds.

51. The system of claim 47 , wherein the wireless device is further configured to determine the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device.

52. The system of claim 47 , wherein the second field comprises two bits.

53. The system of claim 47 , wherein the wireless device is further configured to perform an LBT process for the LBT period.

54. The system of claim 47 , wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value.

55. The system of claim 47 , wherein the wireless device is further configured to not transmit uplink signals via the unlicensed cell during a gap period before the starting position.

56. The system of claim 47 , wherein the wireless device is further configured to receive a full downlink subframe in a subframe preceding the uplink subframe.

57. The system of claim 47 , wherein the wireless device is further configured to receive a partial downlink subframe in a subframe preceding the uplink subframe.

58. The system of claim 47 , wherein the DCI is dedicated DCI.

59. The system of claim 47 , wherein the wireless device is further configured to:

receive a timing advance command comprising the timing advance value; and

adjust uplink transmission timing for one or more uplink channels based on the timing advance value.

60. The system of claim 47 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

61. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

receive one or more messages comprising configuration parameters of an unlicensed cell;

receive downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;

generate one or more transport blocks based on the DCI; and

transmit, using the uplink resources and starting from the starting position of the uplink subframe, the one or more transport blocks.

62. The non-transitory computer-readable medium of claim 61 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

63. The non-transitory computer-readable medium of claim 62 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with twenty-five micro-seconds plus at least one microsecond after the beginning of symbol zero of the uplink subframe; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

64. The non-transitory computer-readable medium of claim 61 , wherein the LBT period is twenty-five micro-seconds.

65. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to determine the starting position of the uplink subframe, wherein the timing advance value is associated with uplink transmission by the wireless device.

66. The non-transitory computer-readable medium of claim 61 , wherein the second field comprises two bits.

67. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to perform an LBT process for the LBT period.

68. The non-transitory computer-readable medium of claim 61 , wherein the uplink subframe starts earlier than a downlink subframe by the timing advance value.

69. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to not transmit uplink signals via the unlicensed cell during a gap period before the starting position.

70. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to receive a full downlink subframe in a subframe preceding the uplink subframe.

71. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to receive a partial downlink subframe in a subframe preceding the uplink subframe.

72. The non-transitory computer-readable medium of claim 61 , wherein the DCI is dedicated DCI.

73. The non-transitory computer-readable medium of claim 61 , wherein the instructions, when executed, further configure the wireless device to:

receive a timing advance command comprising the timing advance value; and

adjust uplink transmission timing for one or more uplink channels based on the timing advance value.

74. The non-transitory computer-readable medium of claim 61 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.

75. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:

transmit one or more messages comprising configuration parameters of an unlicensed cell;

transmit downlink control information (DCI) for the unlicensed cell, wherein the DCI comprises:

a first field indicating uplink resources for an uplink subframe of the unlicensed cell; and

a second field indicating that a starting position of the uplink subframe is based on a sum of a listen-before-talk (LBT) period and a timing advance value;

receive, via the uplink resources and based on the DCI, one or more transport blocks.

76. The non-transitory computer-readable medium of claim 75 , wherein the second field indicates a value of a plurality of values associated with determination of the starting position of the uplink subframe.

77. The non-transitory computer-readable medium of claim 76 , wherein the plurality of values comprises:

a first value associated with a beginning of symbol zero of the uplink subframe;

a second value associated with twenty-five micro-seconds after the beginning of symbol zero of the uplink subframe;

a third value associated with a number of microseconds after the beginning of symbol zero of the uplink subframe, wherein the number of microseconds is based on twenty-five micro-seconds plus a timing advance; and

a fourth value associated with a beginning of symbol one of the uplink subframe.

78. The non-transitory computer-readable medium of claim 75 , wherein the LBT period is twenty-five micro-seconds.

79. The non-transitory computer-readable medium of claim 75 , wherein the second field comprises two bits.

80. The non-transitory computer-readable medium of claim 75 , wherein the instructions, when executed, further configure the base station to transmit a full downlink subframe in a subframe preceding the uplink subframe.

81. The non-transitory computer-readable medium of claim 75 , wherein the DCI is dedicated DCI.

82. The non-transitory computer-readable medium of claim 75 , wherein the instructions, when executed, further configure the base station to transmit a timing advance command comprising the timing advance value.

83. The non-transitory computer-readable medium of claim 75 , wherein the unlicensed cell comprises at least one of:

a licensed assisted access (LAA) cell;

a cell that uses an unlicensed spectrum for transmission;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more 3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more non-3GPP standards;

a cell that uses an unlicensed spectrum for transmission in accordance with one or more regulatory requirements;

a primary cell;

a secondary cell; or

a primary secondary cell.