Scheduling of device-to-device scheduling assignment for mode1

• US 9,883,513 B2
• Filed: 01/28/2015
• Issued: 01/30/2018
• Est. Priority Date: 03/19/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Patil, Shailesh, Tavildar, Saurabha Rangrao, Baghel, Sudhir Kumar, Gulati, Kapil
• Primary Examiner(s): Milord, Marceau
• Application Number:
  US14/607,383
• Publication Number:
  US 20150271807A1
• Time in Patent Office: 1,098 Days
• Field of Search: 4554261, 455450, 4554522
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Methods, systems, and devices are described for transmitting or receiving at least one grant to a device. The at least one grant may identify one or more scheduling assignment (SA) resources on which an SA is to be transmitted by the device for device-to-device (D2D) communications. The at least one grant may also identify one or more data resources on which data is to be transmitted by the device for D2D communications.

Claims

1. A method of wireless communications, comprising:

transmitting at least one grant to a first device, the at least one grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted by the first device for a device-to-device (D2D) communication between the first device and a second device, and the at least one grant identifying one or more data resources on which data is to be transmitted by the first device for the D2D communication between the first device and the second device, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

2. The method of claim 1, further comprising:

scrambling the at least one grant according to a scrambling type, the scrambling type indicating that the one or more SA resources and the one or more data resources are allocated for the D2D communication.

3. The method of claim 2, wherein the scrambling type comprises a D2D radio network temporary identifier (RNTI).

4. The method of claim 2, wherein the scrambling type comprises a semi-persistent scheduling (SPS) D2D radio network temporary identifier (RNTI).

5. The method of claim 2, wherein the scrambling comprises scrambling a cyclic redundancy check (CRC) of the at least one grant.

6. The method of claim 1, wherein the at least one grant comprises a single grant.

7. The method of claim 6, wherein the single grant identifies the one or more SA resources for the first device to use to transmit the SA, the one or more data resources being identified by the first device based at least in part on the one or more SA resources.

8. The method of claim 1, wherein the at least one grant comprises a first grant and a second grant, the first grant identifying the one or more SA resources, and the second grant identifying the one or more data resources.

9. The method of claim 8, wherein the transmitting comprises:

transmitting the first grant identifying the one or more SA resources at a first time period; and

transmitting the second grant identifying the one or more data resources at a second time period, the second time period being different from the first time period, and the second time period being determined based at least in part on the first time period.

10. The method of claim 9, further comprising:

setting an indicator to differentiate between the transmission of the first grant identifying the one or more SA resources and the transmission of the second grant identifying the one or more data resources.

11. The method of claim 1, wherein the at least one grant comprises an SA transmit power, an SA modulation and coding scheme (MCS), an SA redundancy version, or a combination thereof.

12. The method of claim 1, wherein the at least one grant comprises a data transmit power, a data modulation and coding scheme (MCS), a data redundancy version, or a combination thereof.

13. The method of claim 1, wherein the at least one grant comprises a target identification (ID) for a destination device of the SA, wherein the target ID is a groupcast ID, a broadcast ID, or a unicast ID, and wherein the target ID is compressed or index-based.

14. The method of claim 1, wherein the at least one grant comprises a time hopping pattern of the one or more data resources, a frequency hopping pattern of the one or more data resources, or a combination thereof.

15. The method of claim 1, wherein the at least one grant includes one or more transmit power control (TPC) bits, the TPC bits indicating an SA transmit power or a data transmit power.

16. The method of claim 1, wherein the at least one grant is transmitted via a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH), or a combination thereof, in Long Term Evolution (LTE).

17. The method of claim 16, wherein the at least one grant is included in downlink control information (DCI).

18. The method of claim 16, wherein the PDSCH includes information regarding both the one or more SA resources and the one or more data resources for D2D communications.

19. The method of claim 16, further comprising:

scrambling the at least one grant transmitted via the PDCCH with a D2D radio network temporary identifier (RNTI) to indicate that the at least one grant is related to the D2D communication.

20. The method of claim 16, further comprising:

scrambling the at least one grant transmitted via the PDCCH with a target identifier (ID).

21. An apparatus for wireless communications, comprising:

means for transmitting at least one grant to a first device, the at least one grant comprising a first grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted by the first device for a device-to-device (D2D) communication between the first device and a second device, and the at least one grant identifying one or more data resources on which data is to be transmitted by the first device for the D2D communication between the first device and the second device, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

22. The apparatus of claim 21, further comprising:

means for scrambling the at least one grant according to a scrambling type, the scrambling type indicating that the one or more SA resources and the one or more data resources are allocated for the D2D communication.

23. The apparatus of claim 22, wherein the scrambling type comprises a D2D radio network temporary identifier (RNTI).

24. The apparatus of claim 22, wherein the scrambling type comprises a semi-persistent scheduling (SPS) D2D radio network temporary identifier (RNTI).

25. The apparatus of claim 22, wherein the means for scrambling is configured to scramble a cyclic redundancy check (CRC) of the at least one grant.

26. The apparatus of claim 21, wherein the at least one grant comprises a single grant.

27. The apparatus of claim 26, wherein the single grant identifies the one or more SA resources for the first device to use to transmit the SA, the one or more data resources being identified by the first device based at least in part on the one or more SA resources.

28. The apparatus of claim 21, wherein the at least one grant comprises a first grant and a second grant, the first grant identifying the one or more SA resources, and the second grant identifying the one or more data resources.

29. The apparatus of claim 28, wherein the means for transmitting is configured to:

transmit the first grant identifying the one or more SA resources at a first time period; and

transmit the second grant identifying the one or more data resources at a second time period, the second time period being different from the first time period, and the second time period being determined based at least in part on the first time period.

30. The apparatus of claim 29, further comprising:

means for setting an indicator to differentiate between the transmission of the first grant identifying the one or more SA resources and the transmission of the second grant identifying the one or more data resources.

31. A device for use in a wireless communications system, comprising:

a processor;

memory in electronic communication with the processor; and

instructions being stored in the memory, the instructions being executable by the processor to;

transmit at least one grant to a first device, the at least one grant comprising a first grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted by the first device for a device-to-device (D2D) communication between the first device and a second device, and the at least one grant identifying one or more data resources on which data is to be transmitted by the first device for the D2D communication between the first device and the second device, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

32. The device of claim 31, wherein the instructions are executable by the processor to:

scramble the at least one grant according to a scrambling type, the scrambling type indicating that the one or more SA resources and the one or more data resources are allocated for the D2D communication.

33. The device of claim 32, wherein the scrambling type comprises a D2D radio network temporary identifier (RNTI).

34. The device of claim 32, wherein the scrambling type comprises a semi-persistent scheduling (SPS) D2D radio network temporary identifier (RNTI).

35. The device of claim 32, wherein the instructions are executable by the processor to:

scramble a cyclic redundancy check (CRC) of the at least one grant.

36. The device of claim 31, wherein the at least one grant comprises a single grant.

37. The device of claim 36, wherein the single grant identifies the one or more SA resources for the first device to use to transmit the SA, the one or more data resources being identified by the first device based at least in part on the one or more SA resources.

38. The device of claim 31, wherein the at least one grant comprises a first grant and a second grant, the first grant identifying the one or more SA resources, and the second grant identifying the one or more data resources.

39. The device of claim 38, wherein the instructions are executable by the processor to:

transmit the first grant identifying the one or more SA resources at a first time period; and

transmit the second grant identifying the one or more data resources at a second time period, the second time period being different from the first time period, and the second time period being determined based at least in part on the first time period.

40. The device of claim 39, wherein the instructions are executable by the processor to:

set an indicator to differentiate between the transmission of the first grant identifying the one or more SA resources and the transmission of the second grant identifying the one or more data resources.

41. A non-transitory computer-readable medium storing code for communications at a wireless device, the code comprising instructions executable to:

transmit at least one grant to a first device, the at least one grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted by the first device for a device-to-device (D2D) communication between the first device and a second device, and the at least one grant identifying one or more data resources on which data is to be transmitted by the first device for the D2D communication between the first device and the second device, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

42. The non-transitory computer-readable medium of claim 41, wherein the instructions are executable to:

scramble the at least one grant according to a scrambling type, the scrambling type indicating that the one or more SA resources and the one or more data resources are allocated for the D2D communication.

43. The non-transitory computer-readable medium of claim 42, wherein the scrambling type comprises a D2D radio network temporary identifier (RNTI).

44. The non-transitory computer-readable medium of claim 42, wherein the scrambling type comprises a semi-persistent scheduling (SPS) D2D radio network temporary identifier (RNTI).

45. The non-transitory computer-readable medium of claim 42, wherein the instructions are executable to:

scramble a cyclic redundancy check (CRC) of the at least one grant.

46. The non-transitory computer-readable medium of claim 41, wherein the at least one grant comprises a single grant.

47. The non-transitory computer-readable medium of claim 46, wherein the single grant identifies the one or more SA resources for the first device to use to transmit the SA, the one or more data resources being identified by the first device based at least in part on the one or more SA resources.

48. The non-transitory computer-readable medium of claim 41, wherein the at least one grant comprises a first grant and a second grant, the first grant identifying the one or more SA resources, and the second grant identifying the one or more data resources.

49. The non-transitory computer-readable medium of claim 48, wherein the instructions are executable to:

transmit the first grant identifying the one or more SA resources at a first time period; and

transmit the second grant identifying the one or more data resources at a second time period, the second time period being different from the first time period, and the second time period being determined based at least in part on the first time period.

50. The non-transitory computer-readable medium of claim 49, wherein the instructions are executable to:

set an indicator to differentiate between the transmission of the first grant identifying the one or more SA resources and the transmission of the second grant identifying the one or more data resources.

51. A method of wireless communications, comprising:

receiving, at a first device, at least one grant from a base station, the at least one grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted from the first device to a second device for a device-to-device (D2D) communication between the first device and the second device and the at least one grant identifying one or more data resources on which data is to be transmitted for the D2D communication between the first device and the second device; and

transmitting, by the first device to the second device, the SA on the one or more SA resources identified by the at least one grant, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

52. The method of claim 51, wherein the at least one grant is scrambled, the method further comprising:

descrambling the at least one grant according to a descrambling technique.

53. The method of claim 52, further comprising:

determining that the one or more SA resources and the one or more data resources are allocated for the D2D communication based at least in part on the descrambling technique.

54. The method of claim 52, further comprising:

determining that the one or more SA resources and the one or more data resources are semi-persistently allocated for the D2D communication based at least in part on the descrambling technique.

55. The method of claim 52, wherein the descrambling comprises descrambling a cyclic redundancy check (CRC) of the at least one grant.

56. The method of claim 51, wherein the at least one grant comprises a single grant.

57. The method of claim 56, further comprising:

identifying, from the single grant, the one or more SA resources to use to transmit the SA; and

identifying the one or more data resources to use to transmit the data, the identification of the one or more data resources based at least in part on the one or more SA resources.

58. The method of claim 51, wherein the at least one grant comprises a first grant and a second grant, the first grant identifying the one or more SA resources, and the second grant identifying the one or more data resources.

59. The method of claim 58, wherein the receiving comprises:

receiving the first grant identifying the one or more SA resources at a first time period; and

receiving the second grant identifying the one or more data resources at a second time period, the second time period being different from the first time period, and the second time period being determined based at least in part on the first time period.

60. The method of claim 59, further comprising:

analyzing an indicator to differentiate between the transmission of the first grant identifying the one or more SA resources and the transmission of the second grant identifying the one or more data resources.

61. The method of claim 51, wherein the at least one grant is received via a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH), or a combination thereof, in Long Term Evolution (LTE).

62. The method of claim 61, wherein the PDSCH includes information regarding both the one or more SA resources and the one or more data resources for the D2D communication.

63. The method of claim 61, further comprising:

descrambling the at least one grant transmitted via the PDCCH with a D2D radio network temporary identifier (RNTI) to indicate that the at least one grant is related to the D2D communication.

64. The method of claim 61, further comprising:

descrambling the at least one grant transmitted via the PDCCH with a target identifier (ID).

65. The method of claim 61, wherein the at least one grant is included in downlink control information (DCI).

66. An apparatus for wireless communications, comprising:

means for receiving, at a first device, at least one grant from a base station, the at least one grant comprising a first grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted from the first device to a second device for a device-to-device (D2D) communication between the first device and the second device, and the at least one grant identifying one or more data resources on which data is to be transmitted for the D2D communication between the first device and the second device; and

means for transmitting, by the first device to the second device, the SA on the one or more SA resources identified by the at least one grant, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

67. A first device for wireless communications, comprising:

a processor;

memory in electronic communication with the processor; and

instructions being stored in the memory, the instructions being executable by the processor to;

receive, at the first device, at least one grant from a base station, the at least one grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted from the first device to a second device for a device-to-device (D2D) communication between the first device and the second device, and the at least one grant identifying one or more data resources on which data is to be transmitted for the D2D communication between the first device and the second device; and

transmit, by the first device to the second device, the SA on the one or more SA resources identified by the at least one grant, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.

68. A non-transitory computer-readable medium storing code for communications at a first device, the code comprising instructions executable to:

receive, at the first device, at least one grant from a base station, the at least one grant identifying one or more scheduling assignment (SA) resources on which an SA is to be transmitted from the first device to a second device for a device-to-device (D2D) communication between the first device and the second device, and the at least one grant identifying one or more data resources on which data is to be transmitted for the D2D communication between the first device and the second device; and

transmit, by the first device to the second device, the SA on the one or more SA resources identified by the at least one grant, wherein the SA schedules the data transmission on the one or more data resources identified by the at least one grant for the D2D communication.