IP Library Granted Patent US 11,025,403
Granted Patent B2
US 11,025,403 · App. 15/991,829 · Granted Jun 1, 2021

Frame structure dependent configuration of physical channels

Inventors: Srinivas Yerramalli (San Diego, CA); Chih-Hao Liu (San Diego, CA); Tamer Kadous (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04L5/1438H04L1/0038H04L1/0045H04L1/0072H04L5/001H04L5/0003H04L5/0057H04L5/0078H04L5/0094H04L5/1469H04L5/005H04L5/0048H04L5/0051H04L5/0053H04W72/042H04W72/0446
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Quick Facts
Patent No.
US 11,025,403
App. No.
15/991,829
Granted
Jun 1, 2021
Kind
B2
Abstract

A method, an apparatus, and a computer program for wireless communication that allows for greater scheduling flexibility of physical resources are disclosed. A UE receives information from a base station about a time division duplex (TDD) frame structure of a plurality of frames that include a plurality of subframes. The UE determines a control channel search space within the plurality of subframes based on the information. The UE determines a search strategy including a maximum aggregation level based on the control channel search space. The UE performs a blind decoding of the control channel search space with the search strategy to obtain control information. The control channel search space may include a size and a location of a subset of the DL subframes allowed to carry the control information. The UE may determine a plurality of UL subframes assigned for transmitting scheduled UL resources associated with a UL control signaling.

Claims (40)

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

receiving, from a base station, information about a time division duplex (TDD) frame structure of a plurality of frames, wherein the plurality of frames includes a plurality of subframes;

determining a control channel search space within the plurality of subframes based on the information about the TDD frame structure of the plurality of frames;

determining a search strategy including a maximum aggregation level based on the control channel search space, wherein said determining the search strategy comprises determining the maximum aggregation level for the control channel search space based on a number of downlink (DL) subframes in a first subset of DL subframes, wherein the control channel search space scales with the number of DL subframes in the plurality of frames; and

performing a blind decoding of the control channel search space with the search strategy to obtain control information.

2. The method of claim 1 , wherein the received information about the TDD frame structure of the plurality of frames indicates the number of DL subframes in the plurality of frames, and said determining the control channel search space comprises determining at least one of the size and a location of the first subset of the DL subframes allowed to carry the control information.

3. The method of claim 2 , wherein said performing the blind decoding comprises performing the blind decoding of the control channel search space based on the determined maximum aggregation level.

4. The method of claim 3 , wherein said performing the blind decoding comprises performing the blind decoding of the control channel search space for one or more control channel candidates over one or more aggregation levels based on the determined maximum aggregation level.

5. The method of claim 2 , wherein said determining the search strategy further comprises determining a second subset of the first subset of the DL subframes allowed to carry the control information, and said performing the blind decoding comprises performing the blind decoding of the control channel search space based on the determined second subset of the first subset of the DL subframes.

6. The method of claim 1 , wherein the received information about the TDD frame structure of the plurality of frames indicates at least one of a size and a location of a plurality of downlink (DL) subframes in the plurality of frames allowed to carry the control information.

7. The method of claim 1 , wherein the control information comprises an expected TDD frame structure of a subsequent plurality of frames.

8. An apparatus for wireless communication, comprising:

a processing system, configured to:

receive, from a base station, information about a time division duplex (TDD) frame structure of a plurality of frames, wherein the plurality of frames includes a plurality of subframes;

determine a control channel search space within the plurality of subframes based on the information about the TDD frame structure of the plurality of frames;

determine a search strategy including a maximum aggregation level based on the control channel search space, wherein to determine the search strategy the processing system is configured to determine the maximum aggregation level for the control channel search space based on a number of downlink (DL) subframes in a first subset of DL subframes, wherein the control channel search space scales with the number of DL subframes in the plurality of frames; and

perform a blind decoding of the control channel search space with the search strategy to obtain control information.

9. The apparatus of claim 8 , wherein the received information about the TDD frame structure of the plurality of frames indicates the number of DL subframes in the plurality of frames, and the processing system is further configured to determine at least one of the size and a location of the first subset of the DL subframes allowed to carry the control information for the control channel search space.

10. The apparatus of claim 9 , and wherein the processing system is configured to perform the blind decoding of the control channel search space based on the determined maximum aggregation level.

11. The apparatus of claim 10 , wherein the processing system is configured to perform the blind decoding of the control channel search space for one or more control channel candidates over one or more aggregation levels based on the determined maximum aggregation level.

12. The apparatus of claim 9 , wherein the processing system is configured to determine the search strategy by being configured to determine a second subset of the first subset of the DL subframes allowed to carry the control information, and wherein the processing system is configured to perform the blind decoding of the control channel search space based on the determined second subset of the first subset of the DL subframes.

13. The apparatus of claim 8 , wherein the received information about the TDD frame structure of the plurality of frames indicates at least one of a size and a location of downlink (DL) subframes in the plurality of frames allowed to carry the control information for the control channel search space.

14. The apparatus of claim 8 , wherein the control information comprises an expected TDD frame structure of a subsequent plurality of frames.

15. An apparatus for wireless communication, comprising:

means for receiving, from a base station, information about a time division duplex (TDD) frame structure of a plurality of frames, wherein the plurality of frames includes a plurality of subframes;

means for determining a control channel search space within the plurality of subframes based on the information about the TDD frame structure of the plurality of frames;

means for determining a search strategy including a maximum aggregation level based on the control channel search space, wherein the means for determining the search strategy is further configured to determine the maximum aggregation level for the control channel search space based on a number of downlink (DL) subframes in a first subset of DL subframes, wherein the control channel search space scales with the number of DL subframes in the plurality of frames; and

means for performing a blind decoding of the control channel search space with the search strategy to obtain control information.

16. The apparatus of claim 15 , wherein the received information about the TDD frame structure of the plurality of frames indicates the number of DL subframes in the plurality of frames, and the means for determining the control channel search space is further configured to determine at least one of the size and a location of the first subset of the DL subframes allowed to carry the control information for the control channel search space.

17. The apparatus of claim 16 , wherein the means for performing the blind decoding is further configured to perform the blind decoding of the control channel search space based on the determined maximum aggregation level.

18. The apparatus of claim 17 , wherein the means for performing the blind decoding is further configured to perform the blind decoding of the control channel search space for one or more control channel candidates over one or more aggregation levels based on the determined maximum aggregation level.

19. The apparatus of claim 16 , wherein the means for determining the search strategy is further configured to determine a second subset of the first subset of the DL subframes allowed to carry the control information, and wherein the means for performing the blind decoding is further configured to perform the blind decoding of the control channel search space based on the determined second subset of the first subset of the DL subframes.

20. The apparatus of claim 15 , wherein the received information about the TDD frame structure of the plurality of frames indicates at least one of a size and a location of downlink (DL) subframes in the plurality of frames allowed to carry the control information for the control channel search space.

21. The apparatus of claim 15 , wherein the control information comprises an expected TDD frame structure of a subsequent plurality of frames.

22. A computer program product, comprising:

a non-transitory computer-readable medium comprising code for:

receiving, from a base station, information about a time division duplex (TDD) frame structure of a plurality of frames, wherein the plurality of frames includes a plurality of subframes;

determining a control channel search space within the plurality of subframes based on the information about the TDD frame structure of the plurality of frames;

determining a search strategy including a maximum aggregation level based on the control channel search space, wherein determining the search strategy comprises code to determine the maximum aggregation level for the control channel search space based on a number of downlink (DL) subframes in a first subset of DL subframes, wherein the control channel search space scales with the number of DL subframes in the plurality of frames; and

performing a blind decoding of the control channel search space with the search strategy to obtain control information.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 3, 2018
From: YERRAMALLI, SRINIVAS; LIU, CHIH-HAO; KADOUS, TAMER
To: QUALCOMM INCORPORATED
Reel/Frame 046550/0935 →
Continuity (2)
Provisional Application 62531837 · Jul 12, 2017
Related Publication 20190020461A1 · Jan 17, 2019