IP Library › Granted Patent US 11,432,230

Granted Patent B2

US 11,432,230 · App. 17/033,137 · Granted Aug 30, 2022

UE report of time delays and phases from multiple transmission-reception points for pre-equalization

Inventors: Shay Landis (Hod Hasharon, IL); Assaf Touboul (Netanya, IL); Yehonatan Dallal (Kfar Saba, IL); Idan Michael Horn (Hod Hasharon, IL); Michael Levitsky (Rehovot, IL); Ran Berliner (Kfar-Aviv, IL)

Assignee: QUALCOMM Incorporated

H04W48/14 H04W24/10 H04W48/16 H04W72/1231

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Quick Facts

Patent No.: US 11,432,230
App. No.: 17/033,137
Granted: Aug 30, 2022
Kind: B2

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USPTO Patent Center↗ Full Patent PDF↗

Abstract

Aspects of disclosure relate to a UE reporting to a gNB time delays and phases of pilot signals received via multiple transmission paths in order for the gNB to pre-equalize a future transmission to the UE. The UE determines a first time delay for receiving a first pilot signal from a gNB via a first path, determines a second time delay for receiving a second pilot signal from the gNB via a second path, and generates a report based on the first time delay and the second time delay. The UE then sends the report to the gNB and receives a multi-TRP signal from the gNB via the first path and the second path, wherein the multi-TRP signal is pre-equalized for transmission based on the report to at least have a same time delay as a shorter one of the first time delay or the second time delay.

Claims (273)

1. A method of wireless communication performed at a user equipment (UE), comprising:

determining a first time delay for receiving a first pilot signal from a network entity via a first transmission path;

determining a second time delay for receiving a second pilot signal from the network entity via a second transmission path;

generating a message based on the first time delay and the second time delay;

sending the message to the network entity; and

receiving a multi-transmission-reception point (TRP) signal from the network entity via the first transmission path and the second transmission path, wherein the multi-TRP signal is pre-equalized for transmission based on the message.

2. The method of claim 1 , further comprising:

receiving the first pilot signal via the first transmission path; and

receiving the second pilot signal via the second transmission path.

3. The method of claim 2 , wherein:

the receiving the first pilot signal comprises receiving the first pilot signal in a first symbol and the receiving the second pilot signal comprises receiving the second pilot signal in a second symbol different from the first symbol; or

the receiving the first pilot signal comprises receiving the first pilot signal in a same symbol as the second pilot signal and the receiving the second pilot signal comprises receiving the second pilot signal in the same symbol as the first pilot signal, wherein the second pilot signal has a cyclic delay with respect to the first pilot signal.

4. The method of claim 1 , wherein the generating the message comprises indicating the first time delay and the second time delay in the message.

5. The method of claim 1 , wherein the generating the message comprises:

determining a time difference between the first time delay and the second time delay;

determining whether the first transmission path or the second transmission path has a longer time delay based on the first time delay and the second time delay; and

indicating, in the message, the time difference and whether the first transmission path or the second transmission path has the longer time delay.

6. The method of claim 1 , further comprising:

determining a first phase of the first pilot signal received via the first transmission path; and

determining a second phase of the second pilot signal received via the second transmission path.

7. The method of claim 6 , wherein the generating the message comprises indicating the first phase and the second phase in the message, and

wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to have a same phase as one of the first phase or the second phase.

8. The method of claim 6 , wherein the generating the message comprises:

determining a phase difference between the first phase and the second phase; and

indicating the phase difference in the message,

9. The method of claim 1 , further comprising:

determining a first amplitude of the first pilot signal received via the first transmission path; and

determining a second amplitude of the second pilot signal received via the second transmission path,

wherein the generating the message comprises indicating the first amplitude and the second amplitude in the message, and

wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

10. A method of wireless communication performed at a user equipment (UE), comprising:

determining a first phase of a first pilot signal received from a network entity via a first transmission path;

determining a second phase of a second pilot signal received from the network entity via a second transmission path;

generating a message based on the first phase and the second phase;

sending the message to the network entity; and

11. The method of claim 10 , further comprising:

receiving the first pilot signal via the first transmission path; and

receiving the second pilot signal via the second transmission path.

12. The method of claim 11 , wherein:

13. The method of claim 10 , wherein the generating the message comprises indicating the first phase and the second phase in the message.

14. The method of claim 10 , wherein the generating the message comprises:

determining a phase difference between the first phase and the second phase; and

indicating the phase difference in the message.

15. The method of claim 10 , further comprising:

determining a first time delay for receiving the first pilot signal via the first transmission path; and

determining a second time delay for receiving the second pilot signal via the second transmission path.

16. The method of claim 15 , wherein the generating the message comprises indicating the first time delay and the second time delay in the message, and

wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

17. The method of claim 15 , wherein the generating the message comprises:

determining a time difference between the first time delay and the second time delay;

determining whether the first pilot signal or the second pilot signal has a longer time delay based on the first time delay and the second time delay; and

indicating, in the message, the time difference and whether the first pilot signal or the second pilot signal has the longer time delay,

18. The method of claim 10 , further comprising:

determining a first amplitude of the first pilot signal received via the first transmission path; and

determining a second amplitude of the second pilot signal received via the second transmission path,

wherein the generating the message comprises indicating the first amplitude and the second amplitude in the message, and

19. A method of wireless communication performed at a network entity, comprising:

transmitting a first pilot signal via a first transmission path;

transmitting a second pilot signal via a second transmission path;

receiving a message based on a first time delay at which the first pilot signal is received and a second time delay at which the second pilot signal is received;

pre-equalizing a multi-transmission-reception point (TRP) signal for transmission based on the message; and

transmitting the multi-TRP signal via the first transmission path and the second transmission path.

20. The method of claim 19 , wherein:

the transmitting the first pilot signal comprises transmitting the first pilot signal in a first symbol and the transmitting the second pilot signal comprises transmitting the second pilot signal in a second symbol different from the first symbol; or

the transmitting the first pilot signal comprises transmitting the first pilot signal in a same symbol as the second pilot signal and the transmitting the second pilot signal comprises transmitting the second pilot signal in the same symbol as the first pilot signal, wherein the second pilot signal has a cyclic delay with respect to the first pilot signal.

21. The method of claim 19 , wherein the message comprises an indication of the first time delay and the second time delay.

22. The method of claim 19 , wherein the message comprises:

a time difference between the first time delay and the second time delay; and

an indication of whether the first transmission path or the second transmission path has a longer time delay.

23. The method of claim 19 , wherein the message is received from a user equipment (UE), and the message comprises:

a first phase at which the UE receives the first pilot signal via the first transmission path; and

a second phase at which the UE receives the second pilot signal via the second transmission path,

24. The method of claim 19 , wherein the message is received from a user equipment (UE), and the message comprises:

a phase difference between a first phase at which the UE receives the first pilot signal via the first transmission path and a second phase at which the UE receives the second pilot signal via the second transmission path,

25. The method of claim 19 , wherein the message is received from a user equipment (UE), and the message comprises:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path, wherein the pre-equalizing the multi-TRP signal comprises pre-equalizing the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

26. A method of wireless communication performed at a network entity, comprising:

transmitting a first pilot signal via a first transmission path;

transmitting a second pilot signal via a second transmission path;

receiving a message based on a first phase at which the first pilot signal is received and a second phase at which the second pilot signal is received;

pre-equalizing a multi-transmission-reception point (TRP) signal for transmission based on the message; and

transmitting the multi-TRP signal via the first transmission path and the second transmission path.

27. The method of claim 26 , wherein:

28. The method of claim 26 , wherein the message comprises an indication of the first phase and the second phase.

29. The method of claim 26 , wherein the message comprises:

a phase difference between the first phase and the second phase.

30. The method of claim 26 , wherein the message is received from a user equipment (UE), and the message comprises:

a first time delay at which the UE receives the first pilot signal via the first transmission path; and

a second time delay at which the UE receives the second pilot signal via the second transmission path,

wherein the pre-equalizing the multi-TRP signal comprises pre-equalizing the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

31. The method of claim 26 , wherein the message is received from a user equipment (UE), and the message comprises:

a time difference between a first time delay at which the UE receives the first pilot signal via the first transmission path and a second time delay at which the UE receives the second pilot signal via the second transmission path; and

an indication of whether the first pilot signal or the second pilot signal has a longer time delay,

32. The method of claim 26 , wherein the message is received from a user equipment (UE), and the message comprises:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path,

wherein the pre-equalizing the multi-TRP signal comprises pre-equalizing the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

33. The method of claim 1 , wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

34. The method of claim 10 , wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

35. The method of claim 19 , wherein the pre-equalizing the multi-TRP signal comprises pre-equalizing the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

36. The method of claim 26 , wherein the pre-equalizing the multi-TRP signal comprises pre-equalizing the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

37. A user equipment (UE), comprising:

at least one processor; and

a memory coupled to the at least one processor, the at least one processor configured to:

determine a first time delay for receiving a first pilot signal from a network entity via a first transmission path,

determine a second time delay for receiving a second pilot signal from the network entity via a second transmission path,

generate a message based on the first time delay and the second time delay,

send the message to the network entity, and

receive a multi-transmission-reception point (TRP) signal from the network entity via the first transmission path and the second transmission path, wherein the multi-TRP signal is pre-equalized for transmission based on the message.

38. The UE of claim 37 , further comprising a transceiver, wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

39. The UE of claim 37 , wherein the at least one processor is further configured to:

determine a first phase of the first pilot signal received via the first transmission path;

determine a second phase of the second pilot signal received via the second transmission path; and

generate the message based on the first phase and the second phase,

40. The UE of claim 37 , wherein the at least one processor is further configured to:

determine a first amplitude of the first pilot signal received via the first transmission path;

determine a second amplitude of the second pilot signal received via the second transmission path; and

generate the message based on the first amplitude and the second amplitude,

41. A user equipment (UE), comprising:

means for determining a first time delay for receiving a first pilot signal from a network entity via a first transmission path;

means for determining a second time delay for receiving a second pilot signal from the network entity via a second transmission path;

means for generating a message based on the first time delay and the second time delay;

means for sending the message to the network entity; and

means for receiving a multi-transmission-reception point (TRP) signal from the network entity via the first transmission path and the second transmission path, wherein the multi-TRP signal is pre-equalized for transmission based on the message.

42. A non-transitory computer-readable medium storing code at a user equipment (UE), the code comprising instructions executable by a processor to:

determine a first time delay for receiving a first pilot signal from a network entity via a first transmission path;

determine a second time delay for receiving a second pilot signal from the network entity via a second transmission path;

generate a message based on the first time delay and the second time delay;

send the message to the network entity; and

43. The non-transitory computer-readable medium of claim 42 , wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

44. The non-transitory computer-readable medium of claim 42 , wherein the code further comprises instructions executable by the processor to:

determine a first phase of the first pilot signal received via the first transmission path;

determine a second phase of the second pilot signal received via the second transmission path; and

generate the message based on the first phase and the second phase,

45. The non-transitory computer-readable medium of claim 42 , wherein the code further comprises instructions executable by the processor to:

determine a first amplitude of the first pilot signal received via the first transmission path;

determine a second amplitude of the second pilot signal received via the second transmission path; and

generate the message based on the first amplitude and the second amplitude,

46. A user equipment (UE), comprising:

at least one processor; and

a memory coupled to the at least one processor, the at least one processor configured to:

determine a first phase of a first pilot signal received from a network entity via a first transmission path,

determine a second phase of a second pilot signal received from the network entity via a second transmission path,

generate a message based on the first phase and the second phase,

send the message to the network entity, and

47. The UE of claim 46 , further comprising a transceiver, wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

48. The UE of claim 46 , wherein the at least one processor is further configured to:

determine a first time delay for receiving the first pilot signal via the first transmission path;

determine a second time delay for receiving the second pilot signal via the second transmission path; and

generate the message based on the first time delay and the second time delay,

49. The UE of claim 46 , wherein the at least one processor is further configured to:

determine a first amplitude of the first pilot signal received via the first transmission path;

determine a second amplitude of the second pilot signal received via the second transmission path; and

generate the message based on the first amplitude and the second amplitude,

50. A user equipment (UE), comprising;

means for determining a first phase of a first pilot signal received from a network entity via a first transmission path;

means for determining a second phase of a second pilot signal received from the network entity via a second transmission path;

means for generating a message based on the first phase and the second phase;

means for sending the message to the network entity; and

51. A non-transitory computer-readable medium storing code at a user equipment (UE), the code comprising instructions executable by a processor to:

determine a first phase of a first pilot signal received from a network entity via a first transmission path;

determine a second phase of a second pilot signal received from the network entity via a second transmission path;

generate a message based on the first phase and the second phase;

send the message to the network entity; and

52. The non-transitory computer-readable medium of claim 51 , wherein the multi-TRP signal is pre-equalized for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

53. The non-transitory computer-readable medium of claim 51 , wherein the code further comprises instructions executable by the processor to:

determine a first time delay for receiving the first pilot signal via the first transmission path;

determine a second time delay for receiving the second pilot signal via the second transmission path; and

generate the message based on the first time delay and the second time delay,

54. The non-transitory computer-readable medium of claim 51 , wherein the code further comprises instructions executable by the processor to:

determine a first amplitude of the first pilot signal received via the first transmission path;

determine a second amplitude of the second pilot signal received via the second transmission path; and

generate the message based on the first amplitude and the second amplitude,

55. A network entity, comprising:

at least one processor; and

a memory coupled to the at least one processor, the at least one processor configured to:

transmit a first pilot signal via a first transmission path,

transmit a second pilot signal via a second transmission path,

receive a message based on a first time delay at which the first pilot signal is received and a second time delay at which the second pilot signal is received,

pre-equalize a multi-transmission-reception point (TRP) signal for transmission based on the message, and

transmit the multi-TRP signal via the first transmission path and the second transmission path.

56. The network entity of claim 55 , further comprising a transceiver, wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

57. The network entity of claim 55 , wherein the message is received from a user equipment (UE), and the message is based on:

a first phase at which the UE receives the first pilot signal via the first transmission path; and

a second phase at which the UE receives the second pilot signal via the second transmission path,

wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same phase as one of the first phase or the second phase.

58. The network entity of claim 55 , wherein the message is received from a user equipment (UE), and the message is based on:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path,

wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

59. A network entity, comprising:

means for transmitting a first pilot signal via a first transmission path;

means for transmitting a second pilot signal via a second transmission path;

means for receiving a message based on a first time delay at which the first pilot signal is received and a second time delay at which the second pilot signal is received;

means for pre-equalizing a multi-transmission-reception point (TRP) signal for transmission based on the message; and

means for transmitting the multi-TRP signal via the first transmission path and the second transmission path.

60. A non-transitory computer-readable medium storing code at a network entity, the code comprising instructions executable by a processor to:

transmit a first pilot signal via a first transmission path;

transmit a second pilot signal via a second transmission path;

receive a message based on a first time delay at which the first pilot signal is received and a second time delay at which the second pilot signal is received;

pre-equalize a multi-transmission-reception point (TRP) signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path; and

transmit the multi-TRP signal via the first transmission path and the second transmission path.

61. The non-transitory computer-readable medium of claim 60 , wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

62. The non-transitory computer-readable medium of claim 60 , wherein the message is received from a user equipment (UE), and the message is based on:

a first phase at which the UE receives the first pilot signal via the first transmission path; and

a second phase at which the UE receives the second pilot signal via the second transmission path,

wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same phase as one of the first phase or the second phase.

63. The non-transitory computer-readable medium of claim 60 , wherein the message is received from a user equipment (UE), and the message is based on:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path,

wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

64. A network entity, comprising:

at least one processor; and

a memory coupled to the at least one processor, the at least one processor configured to:

transmit a first pilot signal via a first transmission path,

transmit a second pilot signal via a second transmission path,

receive a message based on a first phase at which the first pilot signal is received and a second phase at which the second pilot signal is received,

pre-equalize a multi-transmission-reception point (TRP) signal for transmission based on the message, and

transmit the multi-TRP signal via the first transmission path and the second transmission path.

65. The network entity of claim 64 , further comprising a transceiver, wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

66. The network entity of claim 64 , wherein the message is received from a user equipment (UE), and the message is based on:

a first time delay at which the UE receives the first pilot signal via the first transmission path; and

a second time delay at which the UE receives the second pilot signal via the second transmission path,

wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

67. The network entity of claim 64 , wherein the message is received from a user equipment (UE), and the message is based on:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path,

wherein the at least one processor configured to pre-equalize the multi-TRP signal is configured to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

68. A network entity, comprising:

means for transmitting a first pilot signal via a first transmission path;

means for transmitting a second pilot signal via a second transmission path;

means for receiving a message based on a first phase at which the first pilot signal is received and a second phase at which the second pilot signal is received;

means for pre-equalizing a multi-transmission-reception point (TRP) signal for transmission based on the message; and

means for transmitting the multi-TRP signal via the first transmission path and the second transmission path.

69. A non-transitory computer-readable medium storing code at a network entity, the code comprising instructions executable by a processor to:

transmit a first pilot signal via a first transmission path;

transmit a second pilot signal via a second transmission path;

receive a message based on a first phase at which the first pilot signal is received and a second phase at which the second pilot signal is received;

transmit the multi-TRP signal via the first transmission path and the second transmission path.

70. The non-transitory computer-readable medium of claim 69 , wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to at least have a same phase as one of the first phase or the second phase.

71. The non-transitory computer-readable medium of claim 69 , wherein the message is received from a user equipment (UE), and the message is based on:

a first time delay at which the UE receives the first pilot signal via the first transmission path; and

a second time delay at which the UE receives the second pilot signal via the second transmission path,

wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same time delay as a shorter one of the first time delay corresponding to the first transmission path or the second time delay corresponding to the second transmission path.

72. The non-transitory computer-readable medium of claim 69 , wherein the message is received from a user equipment (UE), and the message is based on:

a first amplitude of the first pilot signal received by the UE via the first transmission path; and

a second amplitude of the second pilot signal received by the UE via the second transmission path,

wherein the code further comprises instructions executable by the processor to pre-equalize the multi-TRP signal for transmission via the first transmission path and the second transmission path based on the message to have a same amplitude as one of the first amplitude or the second amplitude.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 30, 2021

From: LANDIS, SHAY; TOUBOUL, ASSAF; DALLAL, YEHONATAN; HORN, IDAN MICHAEL; LEVITSKY, MICHAEL; BERLINER, RAN

To: QUALCOMM INCORPORATED

Reel/Frame 055088/0834 →

Continuity (1)

Related Publication 20220104108A1 · Mar 31, 2022