IP Library › Patent Application 15478933

Patent Application

App. No. 15/478,933

SCHEDULING REQUEST TRANSMISSION TO REQUEST RESOURCES FOR A BUFFER STATUS REPORT

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Patent No.: US None
App. No.: 15/478,933

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Abstract

A UE may receive a reference signal or directional synchronization subframe from a base station and transmit a scheduling request to the base station using a resource based on the reference signal or directional synchronization subframe. The scheduling request may enable a base station to grant the UE resources to send a buffer status report (BSR). The resource may be associated with a random access channel (RACH) time period. The UE may also transmit a scheduling request within a frequency region of the RACH time period. The scheduling request may be transmitted based on a received indication of a set of subcarrier, a cyclic shift, or a sequence index. In some examples, the resources used by the UE to send the BSR may include physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH) resources.

Claims (194)

1 . A method for wireless communication, comprising:

receiving a reference signal from a base station;

identifying a resource for transmitting a scheduling request to the base station, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal; and

transmitting the scheduling request to the base station using the resource.

2 . The method of claim 1 , further comprising:

receiving a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

transmitting the BSR to the base station using the resource indicated in the grant.

3 . The method of claim 2 , wherein:

the resource indicated in the grant comprise physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

4 . The method of claim 1 , wherein:

the reference signal from the base station comprises one or more reference signals from a set of reference signals.

5 . The method of claim 4 , further comprising:

identifying a reference signal from the set of reference signals, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal from the set of reference signals.

6 . The method of claim 4 , wherein:

the reference signal from the set of reference signals is at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a demodulation reference signal (DMRS) for a physical broadcast channel (PBCH), a beam reference signal (BRS), channel state indicator reference signal (CSI-RS), a mobility reference signal (MRS), a cell specific reference signal (CRS), or a combination thereof.

7 . The method of claim 1 , further comprising:

determining, based at least in part on the resource, at least one of a transmission time, a set of subcarriers, a cyclic shift, or a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

8 . The method of claim 1 , further comprising:

receiving, from the base station, at least one of a transmission time, a set of subcarriers, a cyclic shift, a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

9 . The method of claim 1 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

10 . The method of claim 1 , wherein:

the scheduling request comprises a short PUCCH format.

11 . The method of claim 1 , wherein:

the resource for transmitting the scheduling request is associated with a random access channel (RACH).

12 . The method of claim 11 , further comprising:

identifying a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is transmitted using resources located within the frequency region associated with scheduling requests.

13 . The method of claim 11 , further comprising:

identifying a cyclic prefix length for the scheduling request, wherein the cyclic prefix length comprises a long cyclic prefix length associated with the RACH or a short cyclic prefix length associated with non-RACH transmissions.

14 . A method for wireless communication, comprising:

transmitting a reference signal to a user equipment (UE); and

receiving a scheduling request from the UE using a resource selected by the UE based at least in part on the reference signal.

15 . The method of claim 14 , further comprising:

transmitting a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

receiving the BSR from the UE using resources indicated in the grant.

16 . The method of claim 15 , wherein:

the resources indicated in the grant comprises physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

17 . The method of claim 14 , wherein:

the resource for receiving the scheduling request is associated with a random access channel (RACH).

18 . The method of claim 17 , further comprising:

identifying a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is received using resources located within the frequency region associated with scheduling requests.

19 . The method of claim 17 , further comprising:

20 . The method of claim 14 , further comprising:

transmitting an indication of at least one of a cyclic shift, a set of subcarriers, or a sequence index to the UE, wherein the scheduling request is received using the cyclic shift, the set of subcarriers, the sequence index, or combinations thereof.

21 . The method of claim 14 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

22 . An apparatus for wireless communication, comprising:

means for receiving a reference signal from a base station;

means for identifying a resource for transmitting a scheduling request to the base station, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal; and

means for transmitting the scheduling request to the base station using the resource.

23 . The apparatus of claim 22 , further comprising:

means for receiving a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

means for transmitting the BSR to the base station using the resource indicated in the grant.

24 . The apparatus of claim 23 , wherein:

the resource indicated in the grant comprise physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

25 . The apparatus of claim 22 , wherein:

the reference signal from the base station comprises one or more reference signals from a set of reference signals.

26 . The apparatus of claim 25 , further comprising:

means for identifying a reference signal from the set of reference signals, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal from the set of reference signals.

27 . The apparatus of claim 25 , wherein:

28 . The apparatus of claim 22 , further comprising:

means for determining, based at least in part on the resource, at least one of a transmission time, a set of subcarriers, a cyclic shift, or a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

29 . The apparatus of claim 22 , further comprising:

means for receiving, from the base station, at least one of a transmission time, a set of subcarriers, a cyclic shift, a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

30 . The apparatus of claim 22 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

31 . The apparatus of claim 22 , wherein:

the scheduling request comprises a short PUCCH format.

32 . The apparatus of claim 22 , wherein:

the resource for transmitting the scheduling request is associated with a random access channel (RACH).

33 . The apparatus of claim 32 , further comprising:

means for identifying a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is transmitted using resources located within the frequency region associated with scheduling requests.

34 . The apparatus of claim 32 , further comprising:

means for identifying a cyclic prefix length for the scheduling request, wherein the cyclic prefix length comprises a long cyclic prefix length associated with the RACH or a short cyclic prefix length associated with non-RACH transmissions.

35 . An apparatus for wireless communication, comprising:

means for transmitting a reference signal to a user equipment (UE); and

means for receiving a scheduling request from the UE using a resource selected by the UE based at least in part on the reference signal.

36 . The apparatus of claim 35 , further comprising:

means for transmitting a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

means for receiving the BSR from the UE using resources indicated in the grant.

37 . The apparatus of claim 36 , wherein:

the resources indicated in the grant comprises physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

38 . The apparatus of claim 35 , wherein:

the resource for receiving the scheduling request is associated with a random access channel (RACH).

39 . The apparatus of claim 38 , further comprising:

means for identifying a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is received using resources located within the frequency region associated with scheduling requests.

40 . The apparatus of claim 38 , further comprising:

41 . The apparatus of claim 35 , further comprising:

means for transmitting an indication of at least one of a cyclic shift, a set of subcarriers, or a sequence index to the UE, wherein the scheduling request is received using the cyclic shift, the set of subcarriers, the sequence index, or combinations thereof.

42 . The apparatus of claim 35 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

43 . An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

receive a reference signal from a base station;

identify a resource for transmitting a scheduling request to the base station, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal; and

transmit the scheduling request to the base station using the resource.

44 . The apparatus of claim 43 , wherein the instructions are further executable by the processor to:

receive a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

transmit the BSR to the base station using the resource indicated in the grant.

45 . The apparatus of claim 44 , wherein:

the resource indicated in the grant comprise physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

46 . The apparatus of claim 43 , wherein:

the reference signal from the base station comprises one or more reference signals from a set of reference signals.

47 . The apparatus of claim 46 , wherein the instructions are further executable by the processor to:

identify a reference signal from the set of reference signals, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal from the set of reference signals.

48 . The apparatus of claim 46 , wherein:

49 . The apparatus of claim 43 , wherein the instructions are further executable by the processor to:

determine, based at least in part on the resource, at least one of a transmission time, a set of subcarriers, a cyclic shift, or a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

50 . The apparatus of claim 43 , wherein the instructions are further executable by the processor to:

receive, from the base station, at least one of a transmission time, a set of subcarriers, a cyclic shift, a sequence index, wherein the scheduling request is transmitted using the transmission time, the set of subcarriers, the cyclic shift, the sequence index, or a combination thereof.

51 . The apparatus of claim 43 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

52 . The apparatus of claim 43 , wherein:

the scheduling request comprises a short PUCCH format.

53 . The apparatus of claim 43 , wherein:

the resource for transmitting the scheduling request is associated with a random access channel (RACH).

54 . The apparatus of claim 53 , wherein the instructions are further executable by the processor to:

identify a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is transmitted using resources located within the frequency region associated with scheduling requests.

55 . The apparatus of claim 53 , wherein the instructions are further executable by the processor to:

identify a cyclic prefix length for the scheduling request, wherein the cyclic prefix length comprises a long cyclic prefix length associated with the RACH or a short cyclic prefix length associated with non-RACH transmissions.

56 . An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

transmit a reference signal to a user equipment (UE); and

receive a scheduling request from the UE using a resource selected by the UE based at least in part on the reference signal.

57 . The apparatus of claim 56 , wherein the instructions are further executable by the processor to:

transmit a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

receive the BSR from the UE using resources indicated in the grant.

58 . The apparatus of claim 57 , wherein:

the resources indicated in the grant comprises physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

59 . The apparatus of claim 56 , wherein:

the resource for receiving the scheduling request is associated with a random access channel (RACH).

60 . The apparatus of claim 59 , wherein the instructions are further executable by the processor to:

identify a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is received using resources located within the frequency region associated with scheduling requests.

61 . The apparatus of claim 59 , wherein the instructions are further executable by the processor to:

62 . The apparatus of claim 56 , wherein the instructions are further executable by the processor to:

transmit an indication of at least one of a cyclic shift, a set of subcarriers, or a sequence index to the UE, wherein the scheduling request is received using the cyclic shift, the set of subcarriers, the sequence index, or combinations thereof.

63 . The apparatus of claim 56 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

64 . A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

receive a reference signal from a base station;

identify a resource for transmitting a scheduling request to the base station, wherein the resource for transmitting the scheduling request is based at least in part on the reference signal; and

transmit the scheduling request to the base station using the resource.

65 . The non-transitory computer-readable medium of claim 64 , wherein the instructions are further executable by the processor to:

receive a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

transmit the BSR to the base station using the resource indicated in the grant.

66 . The non-transitory computer-readable medium of claim 65 , wherein:

the resource indicated in the grant comprise physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

67 . The non-transitory computer-readable medium of claim 64 , wherein:

the reference signal from the base station comprises one or more reference signals from a set of reference signals.

68 . The non-transitory computer-readable medium of claim 67 , wherein the instructions are further executable by the processor to:

69 . The non-transitory computer-readable medium of claim 67 , wherein:

70 . The non-transitory computer-readable medium of claim 64 , wherein the instructions are further executable by the processor to:

71 . The non-transitory computer-readable medium of claim 64 , wherein the instructions are further executable by the processor to:

72 . The non-transitory computer-readable medium of claim 64 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

73 . The non-transitory computer-readable medium of claim 64 , wherein:

the scheduling request comprises a short PUCCH format.

74 . The non-transitory computer-readable medium of claim 64 , wherein:

the resource for transmitting the scheduling request is associated with a random access channel (RACH).

75 . The non-transitory computer-readable medium of claim 74 , wherein the instructions are further executable by the processor to:

76 . The non-transitory computer-readable medium of claim 74 , wherein the instructions are further executable by the processor to:

77 . A non-transitory computer readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:

transmit a reference signal to a user equipment (UE); and

receive a scheduling request from the UE using a resource selected by the UE based at least in part on the reference signal.

78 . The non-transitory computer-readable medium of claim 77 , wherein the instructions are further executable by the processor to:

transmit a grant for transmitting a buffer status report (BSR) in response to the scheduling request; and

receive the BSR from the UE using resources indicated in the grant.

79 . The non-transitory computer-readable medium of claim 78 , wherein:

the resources indicated in the grant comprises physical uplink shared channel (PUSCH) resources, physical uplink control channel (PUCCH) resources, or both.

80 . The non-transitory computer-readable medium of claim 77 , wherein:

the resource for receiving the scheduling request is associated with a random access channel (RACH).

81 . The non-transitory computer-readable medium of claim 80 , wherein the instructions are further executable by the processor to:

identify a frequency region associated with the RACH and a frequency region associated with scheduling requests that does not overlap with the frequency region associated with the RACH, wherein the scheduling request is received using resources located within the frequency region associated with scheduling requests.

82 . The non-transitory computer-readable medium of claim 80 , wherein the instructions are further executable by the processor to:

83 . The non-transitory computer-readable medium of claim 77 , wherein the instructions are further executable by the processor to:

84 . The non-transitory computer-readable medium of claim 77 , wherein:

the scheduling request comprises a sequence repeated a plurality of times over a plurality of symbol periods.

Assignments (2)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 31, 2017

From: ISLAM, MUHAMMAD NAZMUL; SUBRAMANIAN, SUNDAR; CEZANNE, JUERGEN; LI, JUNYI; SAMPATH, ASHWIN; LUO, TAO

To: QUALCOMM INCORPORATED

Reel/Frame 042545/0818 →

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 5, 2017

From: ISLAM, MUHAMMAD NAZMUL; SUBRAMANIAN, SUNDAR; CEZANNE, JUERGEN; LI, JUNYI; SAMPATH, ASHWIN; LUO, TAO

To: QUALCOMM INCORPORATED

Reel/Frame 041865/0890 →