IP Library › Granted Patent US 11,018,787

Granted Patent B2

US 11,018,787 · App. 15/608,851 · Granted May 25, 2021

Time division multiplexing of synchronization channels

Inventors: Muhammad Nazmul Islam (Edison, NJ); Navid Abedini (Raritan, NJ); Tao Luo (San Diego, CA); Sundar Subramanian (Bridgewater, NJ); Juergen Cezanne (Ocean Township, NJ); Ashwin Sampath (Skillman, NJ); Alexei Yurievitch Gorokhov (San Diego, CA); Junyi Li (Chester, NJ); Bilal Sadiq (Basking Ridge, NJ)

Assignee: QUALCOMM Incorporated

H04J1/065 H01Q3/2605 H04B7/0617 H04B7/216 H04B7/2615 H04J11/003 H04L1/08 H04L5/0007 H04L5/0023 H04L25/022 H04L27/2613 H04L27/2662 H04L27/2692 H04J2011/0003 H04J2203/0091 H04L1/0003 H04L1/0009 H04L1/0026 H04L5/005 H04L5/0051 H04L27/2614

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Quick Facts

Patent No.: US 11,018,787
App. No.: 15/608,851
Granted: May 25, 2021
Kind: B2

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Abstract

The apparatus may be a base station. The apparatus processes a first group of synchronization signals. The apparatus processes a second group of synchronization signals. The apparatus performs a first transmission by transmitting the processed first group of the synchronization signals in a first synchronization subframe. The apparatus performs a second transmission by transmitting the processed second group of the synchronization signals in a second synchronization subframe.

Claims (147)

1. A method of wireless communication by a base station, comprising:

processing a first group of synchronization signals;

processing a second group of synchronization signals;

performing a first transmission by transmitting the processed first group of the synchronization signals in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS); and

performing a second transmission by transmitting the processed second group of the synchronization signals in a second synchronization subframe that includes a PSS, a SSS, and a BRS, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

2. The method of claim 1 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

3. The method of claim 2 wherein the first group of the synchronization signals further includes one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes one or more of a PSS, an SSS, and another BRS.

4. The method of claim 3 , wherein the another BRS is a duplicate of the BRS.

5. The method of claim 1 , further comprising:

performing one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmission of the first transmission are performed within the first synchronization subframe.

6. The method of claim 5 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

7. The method of claim 5 , further comprising:

performing one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition of the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are performed within the second synchronization subframe.

8. The method of claim 7 , wherein the first transmission and the one or more repeat transmissions of the first transmission are each performed using a respective one of plurality of beams in respective direction of a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are each performed using a respective beam of the plurality of beams in a respective direction of the plurality of directions.

9. The method of claim 7 , wherein the processing the first group of synchronization signals comprises performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

wherein the first group of the processed synchronization signals includes a first one of the second synchronization signals and the second group of the processed synchronization signals includes a second one of the second synchronization signals.

10. The method of claim 9 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

11. The method of claim 9 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

12. A method of wireless communication by a user equipment (UE), comprising:

receiving, in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS), a first transmission of a first group of synchronization signals processed by processing the first group of synchronization signals;

receiving, in a second synchronization subframe that includes a PSS, a SSS, and a BRS, a second transmission of a second group of synchronization signals processed by processing the second group of synchronization signals; and

performing time-division demultiplexing of the processed first group of synchronization signals and the processed second group of synchronization signals, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

13. The method of claim 12 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

14. The method of claim 13 , wherein the first group of the synchronization signals further includes one or more of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes one or more of a PSS, an SSS, and another BRS.

15. The method of claim 14 , wherein the another BRS is a duplicate of the BRS.

16. The method of claim 12 , further comprising:

receiving one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmissions of the first transmission are received within a first synchronization subframe.

17. The method of claim 16 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

18. The method of claim 16 , further comprising:

receiving one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are received within a second synchronization subframe.

19. The method of claim 18 , wherein the first transmission and the one or more repeat transmissions of the first transmission are received using at least one of a plurality of beams at a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are received using at least one of the plurality of beams at the plurality of directions.

20. The method of claim 18 , wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

21. The method of claim 20 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

22. The method of claim 20 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

23. A base station for wireless communication, comprising:

means for processing a first group of synchronization signals;

means for processing a second group of synchronization signals;

means for performing a first transmission by transmitting the processed first group of the synchronization signals in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS); and

means for performing a second transmission by transmitting the processed second group of the synchronization signals in a second synchronization subframe that includes a PSS, a SSS, and a BRS, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

24. The base station of claim 23 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

25. The base station of claim 24 , wherein the first group of the synchronization signals further includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes a PSS, an SSS, and another BRS.

26. The base station of claim 25 , wherein the another BRS is a duplicate of the BRS.

27. The base station of claim 23 , further comprising:

means for performing one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmission of the first transmission are performed within the first synchronization subframe.

28. The base station of claim 27 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

29. The base station of claim 27 , further comprising:

means for performing one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition of the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are performed within the second synchronization subframe.

30. The base station of claim 29 , wherein the first transmission and the one or more repeat transmissions of the first transmission are each performed using a respective one of plurality of beams in respective direction of a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are each performed using a respective beam of the plurality of beams in a respective direction of the plurality of directions.

31. The base station of claim 29 , wherein the means for processing the first group of synchronization signals is configured to perform time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

32. The base station of claim 31 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

33. The base station of claim 31 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

34. A user equipment (UE) for wireless communication, comprising:

means for receiving, in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS), a first transmission of a first group of synchronization signals processed by processing the first group of synchronization signals;

means for receiving, in a second synchronization subframe that includes a PSS, a SSS, and a BRS, a second transmission of a second group of synchronization signals processed by processing the second group of synchronization signals; and

means for performing time-division demultiplexing of the processed first group of synchronization signals and the processed second group of synchronization signals, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

35. The UE of claim 34 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

36. The UE of claim 35 , wherein the first group of the synchronization signals further includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes a PSS, an SSS, and another BRS.

37. The UE of claim 36 , wherein the another BRS is a duplicate of the BRS.

38. The UE of claim 34 , further comprising:

means for receiving one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmissions of the first transmission are received within a first synchronization subframe.

39. The UE of claim 38 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

40. The UE of claim 38 , further comprising:

means for receiving one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are received within a second synchronization subframe.

41. The UE of claim 40 , wherein the first transmission and the one or more repeat transmissions of the first transmission are received using at least one of a plurality of beams at a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are received using at least one of the plurality of beams at the plurality of directions.

42. The UE of claim 40 , wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

43. The UE of claim 42 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

44. The UE of claim 42 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

45. A base station for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to:

process a first group of synchronization signals;

process a second group of synchronization signals;

perform a first transmission by transmitting the processed first group of the synchronization signals in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS); and

perform a second transmission by transmitting the processed second group of the synchronization signals in a second synchronization subframe that includes a PSS, a SSS, and a BRS, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

46. The base station of claim 45 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

47. The base station of claim 46 , wherein the first group of the synchronization signals further includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes a PSS, an SSS, and another BRS.

48. The base station of claim 47 , wherein the another BRS is a duplicate of the BRS.

49. The base station of claim 45 , wherein the at least one processor is further configured to:

perform one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmission of the first transmission are performed within the first synchronization subframe.

50. The base station of claim 49 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

51. The base station of claim 49 , wherein the at least one processor is further configured to:

perform one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition of the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are performed within the second synchronization subframe.

52. The base station of claim 51 , wherein the first transmission and the one or more repeat transmissions of the first transmission are each performed using a respective one of plurality of beams in respective direction of a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are each performed using a respective beam of the plurality of beams in a respective direction of the plurality of directions.

53. The base station of claim 51 , wherein the at least one processor configured to process the first group of synchronization signals is configured to perform time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

54. The base station of claim 53 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

55. The base station of claim 53 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

56. A user equipment (UE) for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to:

receive, in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS), a first transmission of a first group of synchronization signals processed by processing the first group of synchronization signals;

receive, in a second synchronization subframe that includes a PSS, a SSS, and a BRS, a second transmission of a second group of synchronization signals processed by processing the second group of synchronization signals; and

perform time-division demultiplexing of the processed first group of synchronization signals and the processed second group of synchronization signals, wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of the first group of synchronization signals, and the second group of synchronization signals are processed by performing TDM of the second group of synchronization signals, wherein the first group of synchronization signals includes a physical broadcast channel (PBCH) signal and a duplicate of the PBCH signal.

57. The UE of claim 51 , wherein the second group of the synchronization signals includes a beam reference signal (BRS).

58. The UE of claim 57 , wherein the first group of the synchronization signals further includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the second group of the synchronization signals further includes a PSS, an SSS, and another BRS.

59. The UE of claim 58 , wherein the another BRS is a duplicate of the BRS.

60. The UE of claim 56 , wherein the at least one processor is further configured to:

receive one or more repeat transmissions of the first transmission, wherein each of the one or more repeat transmissions of the first transmission includes a repetition of the first transmission,

wherein the first transmission and the one or more repeat transmissions of the first transmission are received within a first synchronization subframe.

61. The UE of claim 60 , wherein the first transmission includes a transmission of at least one of the processed first synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions in the first synchronization subframe.

62. The UE of claim 60 , wherein the at least one processor is further configured to:

receive one or more repeat transmissions of the second transmission, wherein each of the one or more repeat transmissions of the second transmission includes a repetition the second transmission,

wherein the second transmission and the one or more repeat transmissions of the second transmission are received within a second synchronization subframe.

63. The UE of claim 62 , wherein the first transmission and the one or more repeat transmissions of the first transmission are received using at least one of a plurality of beams at a plurality of directions and the second transmission and the one or more repeat transmissions of the second transmission are received using at least one of the plurality of beams at the plurality of directions.

64. The UE of claim 62 , wherein the first group of synchronization signals are processed by performing time-division multiplexing (TDM) of at least one of a plurality of first synchronization signals of different types and at least one of the plurality of second synchronization signals of different types, the first group of synchronization signals including the plurality of first synchronization signals and the plurality of second synchronization signals, and

65. The UE of claim 64 , wherein the first transmission includes a transmission of the first one of the processed second synchronization signals in the first group being repeated at least once during each of the first transmission and the one or more repeat transmissions of the first transmission in the first synchronization subframe, and the second transmission includes a transmission of the second one of the processed second synchronization signals in the second group being repeated at least once during each of the second transmission and the one or more repeat transmissions of the second transmission in the second synchronization subframe.

66. The UE of claim 64 , wherein the plurality of first synchronization signals include at least one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS), and wherein the plurality of second synchronization signals include at least one of a beam reference signal (BRS), an extended synchronization signal (ESS), or a physical broadcast channel (PBCH) signal.

67. A non-transitory computer-readable medium storing computer executable code for wireless communication by a base station, comprising code to:

process a first group of synchronization signals;

process a second group of synchronization signals;

68. A non-transitory computer-readable medium storing computer executable code for wireless communication by a user equipment (UE), comprising code to:

69. A method of wireless communication by a base station, comprising:

processing one or more first synchronization signals and one or more second synchronization signals;

transmitting the one or more first synchronization signals in a first synchronization subframe that includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a beam reference signal (BRS); and

transmitting the one or more second synchronization signals in a second synchronization subframe,

wherein at least one first synchronization signal of the one or more first synchronization signals has a greater bandwidth than a bandwidth of each of the one or more second synchronization signals.

70. The method of claim 69 , wherein the processing the one or more first synchronization signals and the one or more second synchronization signals comprises:

performing time-division multiplexing (TDM) of the one or more first synchronization signals and the one or more second synchronization signals.

71. The method of claim 69 , wherein the at least one first synchronization signal includes at least one physical broadcast channel (PBCH) signal carried in at least one PBCH symbol.

72. The method of claim 71 , wherein the one or more second synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

73. The method of claim 71 , wherein the at least one PBCH symbol carries a reference signal to demodulate the at least one PBCH signal, and

wherein the bandwidth of the reference signal is greater than a bandwidth of a primary synchronization signal (PSS) and is greater than a bandwidth of a secondary synchronization signal (SSS).

74. The method of claim 73 , wherein the reference signal is a beam reference signal (BRS).

75. The method of claim 71 , wherein the transmitting the one or more first synchronization signals comprises transmitting at least two PBCH signals in at least two PBCH symbols respectively.

76. The method of claim 75 , wherein one PBCH symbol of the at least two PBCH symbols is located at one side of a secondary synchronization signal (SSS) symbol for an SSS and another PBCH symbol of the at least two PBCH symbols is located at another side of the SSS symbol.

77. The method of claim 72 , wherein a frequency band for the at least one PBCH signal is centered around a frequency band for the PSS and a frequency band for the SSS.

78. The method of claim 77 , wherein a bandwidth of the PSS and a bandwidth of the SSS are same.

79. The method of claim 73 , wherein the reference signal to demodulate the at least one PBCH signal further includes information to derive a symbol index of at least one of the one or more first synchronization signals and the one or more second synchronization signals within a slot.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 5, 2017

From: ISLAM, MUHAMMAD NAZMUL; ABEDINI, NAVID; LUO, TAO; SUBRAMANIAN, SUNDAR; CEZANNE, JUERGEN; SAMPATH, ASHWIN; GOROKHOV, ALEXEI YURIEVITCH; LI, JUNYI; SADIQ, BILAL

To: QUALCOMM INCORPORATED

Reel/Frame 042911/0827 →

Continuity (5)

Provisional Application 62344381 · Jun 1, 2016

Provisional Application 62350171 · Jun 14, 2016

Provisional Application 62401801 · Sep 29, 2016

Provisional Application 62410073 · Oct 19, 2016

Related Publication 20170353255A1 · Dec 7, 2017