Reference signaling for a high-mobility wireless communication device

1. A base station for enabling communication with a high-mobility wireless communication device, comprising:

a processor;

memory in electronic communication with the processor;

instructions stored in the memory, the instructions being executable to:

identify a high-mobility wireless communication device;

send a reference signal configuration;

allocate an additional specific reference signal in response to identifying the high-mobility wireless communication device; and

send the additional specific reference signal to the high-mobility wireless communication device.

2. The base station of claim 1 , wherein allocating an additional specific reference signal comprises:

using a baseline specific reference signal; and

adding an additional specific reference signal in an element not including the baseline specific reference signal.

3. The base station of claim 1 , wherein allocating an additional specific reference signal further comprises adding the additional specific reference signal in an element used for a common reference signal.

4. The base station of claim 1 , wherein allocating an additional specific reference signal further comprises adding the additional specific reference signal in an element used for a baseline specific reference signal.

5. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying a same precoding to the additional specific reference signal as is used for a baseline specific reference signal.

6. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying a same scrambling sequence as in a baseline specific reference signal case.

7. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying a different scrambling sequence as in a baseline specific reference signal case.

8. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying a same mapping mechanism as in a baseline specific reference signal case.

9. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying a different mapping mechanism from a baseline specific reference signal case.

10. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying transmission rate matching around the additional specific reference signal.

11. The base station of claim 1 , wherein allocating an additional specific reference signal comprises applying puncturing.

12. The base station of claim 1 , wherein sending a reference signal configuration comprises sending the reference signal configuration using a layer-3 limited rank transmission.

13. The base station of claim 12 , wherein the layer-3 limited rank transmission is separately configured or uses a codebook subset restriction mechanism.

14. The base station of claim 1 , wherein sending a reference signal configuration comprises sending the reference signal configuration using explicit layer-3 signaling.

15. The base station of claim 1 , wherein sending a reference signal configuration comprises sending the reference signal configuration using explicit Physical Downlink Control Channel (PDCCH) signaling.

16. The base station of claim 1 , wherein sending a reference signal configuration comprises sending the reference signal configuration using implicit Physical Downlink Control Channel (PDCCH) signaling.

17. The base station of claim 1 , wherein the reference signal configuration distinguishes between Multimedia Broadcast over a Single-Frequency Network (MBSFN) subframes and non-MBSFN subframes.

18. The base station of claim 1 , wherein the base station is a Node B.

19. The base station of claim 1 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

20. The base station of claim 1 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

21. A wireless communication device for utilizing reference signaling, comprising:

a processor;

memory in electronic communication with the processor;

instructions stored in the memory, the instructions being executable to:

determine whether the wireless communication device is a high-mobility wireless communication device;

receive a reference signal configuration;

receive an additional specific reference signal;

process the additional specific reference signal; and

send information based on the additional specific reference signal.

22. The wireless communication device of claim 21 , wherein the instructions are further executable to send a high-mobility indicator if the wireless communication device is a high-mobility wireless communication device.

23. The wireless communication device of claim 21 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using a layer-3 limited rank transmission.

24. The wireless communication device of claim 23 , wherein the layer-3 limited rank transmission is separately configured or uses a codebook subset restriction mechanism.

25. The wireless communication device of claim 21 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using explicit layer-3 signaling.

26. The wireless communication device of claim 21 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using explicit Physical Downlink Control Channel (PDCCH) signaling.

27. The wireless communication device of claim 21 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using implicit Physical Downlink Control Channel (PDCCH) signaling.

28. The wireless communication device of claim 21 , wherein the reference signal configuration distinguishes between Multimedia Broadcast over a Single-Frequency Network (MBSFN) subframes and non-MBSFN subframes.

29. The wireless communication device of claim 21 , wherein processing the additional specific reference signal comprises generating feedback based on the additional specific reference signal.

30. The wireless communication device of claim 21 , wherein the wireless communication device is a User Equipment (UE).

31. The wireless communication device of claim 21 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

32. The wireless communication device of claim 21 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

33. A method for enabling communication with a high-mobility wireless communication device, comprising:

identifying, by a base station, a high-mobility wireless communication device;

sending a reference signal configuration;

allocating, by the base station, an additional specific reference signal in response to identifying the high-mobility wireless communication device; and

sending, from the base station, the additional specific reference signal to the high-mobility wireless communication device.

34. The method of claim 33 , wherein allocating an additional specific reference signal comprises:

using a baseline specific reference signal; and

adding an additional specific reference signal in an element not including the baseline specific reference signal.

35. The method of claim 33 , wherein allocating an additional specific reference signal further comprises adding the additional specific reference signal in an element used for a common reference signal.

36. The method of claim 33 , wherein allocating an additional specific reference signal further comprises adding the additional specific reference signal in an element used for a baseline specific reference signal.

37. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying a same precoding to the additional specific reference signal as is used for a baseline specific reference signal.

38. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying a same scrambling sequence as in a baseline specific reference signal case.

39. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying a different scrambling sequence as in a baseline specific reference signal case.

40. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying a same mapping mechanism as in a baseline specific reference signal case.

41. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying a different mapping mechanism from a baseline specific reference signal case.

42. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying transmission rate matching around the additional specific reference signal.

43. The method of claim 33 , wherein allocating an additional specific reference signal comprises applying puncturing.

44. The method of claim 33 , wherein sending a reference signal configuration comprises sending the reference signal configuration using a layer-3 limited rank transmission.

45. The method of claim 44 , wherein the layer-3 limited rank transmission is separately configured or uses a codebook subset restriction mechanism.

46. The method of claim 33 , wherein sending a reference signal configuration comprises sending the reference signal configuration using explicit layer-3 signaling.

47. The method of claim 33 , wherein sending a reference signal configuration comprises sending the reference signal configuration using explicit Physical Downlink Control Channel (PDCCH) signaling.

48. The method of claim 33 , wherein sending a reference signal configuration comprises sending the reference signal configuration using implicit Physical Downlink Control Channel (PDCCH) signaling.

49. The method of claim 33 , wherein the reference signal configuration distinguishes between Multimedia Broadcast over a Single-Frequency Network (MBSFN) subframes and non-MBSFN subframes.

50. The method of claim 33 , wherein the base station is a Node B.

51. The method of claim 33 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

52. The method of claim 33 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

53. A method for utilizing reference signaling, comprising:

determining, by a wireless communication device, whether the wireless communication device is a high-mobility wireless communication device;

receiving a reference signal configuration;

receiving, on the wireless communication device, an additional specific reference signal;

processing, on the wireless communication device, the additional specific reference signal; and

sending information based on the additional specific reference signal.

54. The method of claim 53 , further comprising sending a high-mobility indicator if the wireless communication device is a high-mobility wireless communication device.

55. The method of claim 53 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using a layer-3 limited rank transmission.

56. The method of claim 55 , wherein the layer-3 limited rank transmission is separately configured or uses a codebook subset restriction mechanism.

57. The method of claim 53 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using explicit layer-3 signaling.

58. The method of claim 53 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using explicit Physical Downlink Control Channel (PDCCH) signaling.

59. The method of claim 53 , wherein receiving a reference signal configuration comprises receiving the reference signal configuration using implicit Physical Downlink Control Channel (PDCCH) signaling.

60. The method of claim 53 , wherein the reference signal configuration distinguishes between Multimedia Broadcast over a Single-Frequency Network (MBSFN) subframes and non-MBSFN subframes.

61. The method of claim 53 , wherein processing the additional specific reference signal comprises generating feedback based on the additional specific reference signal.

62. The method of claim 53 , wherein the wireless communication device is a User Equipment (UE).

63. The method of claim 53 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

64. The method of claim 53 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

65. A computer-program product for enabling communication with a high-mobility wireless communication device, the computer-program product comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:

code for causing a base station to identify a high-mobility wireless communication device;

code for causing the base station to send a reference signal configuration;

code for causing the base station to allocate an additional specific reference signal in response to identifying the high-mobility wireless communication device; and

code for causing the base station to send the additional specific reference signal to the high-mobility wireless communication device.

66. The computer-program product of claim 65 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

67. The computer-program product of claim 65 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

68. A computer-program product for utilizing reference signaling, the computer-program product comprising a non-transitory tangible computer-readable medium having instructions thereon, the instructions comprising:

code for causing a wireless communication device to determine whether the wireless communication device is a high-mobility wireless communication device;

code for causing the wireless communication device to receive a reference signal configuration;

code for causing the wireless communication device to receive an additional specific reference signal;

code for causing the wireless communication device to process the additional specific reference signal; and

code for causing the wireless communication device to send information based on the additional specific reference signal.

69. The computer-program product of claim 68 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

70. The computer-program product of claim 68 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

71. An apparatus for enabling communication with a high-mobility wireless communication device, comprising:

means for identifying a high-mobility wireless communication device;

means for sending a reference signal configuration;

means for allocating an additional specific reference signal in response to identifying the high-mobility wireless communication device; and

means for sending the additional specific reference signal to the high-mobility wireless communication device.

72. The apparatus of claim 71 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

73. The apparatus of claim 71 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.

74. An apparatus for utilizing reference signaling, comprising:

means for determining whether the apparatus is a high-mobility wireless communication device;

means for receiving a reference signal configuration;

means for receiving an additional specific reference signal;

means for processing the additional specific reference signal; and

means for sending information based on the additional specific reference signal.

75. The apparatus of claim 74 , wherein the specific reference signal is a User Equipment-specific Reference Signal (UE-RS).

76. The apparatus of claim 74 , wherein the additional specific reference signal is in addition to a baseline specific reference signal.