FRAME STRUCTURE DEPENDENT CONFIGURATION OF PHYSICAL CHANNELS

• US 20190020461A1
• Filed: 05/29/2018
• Published: 01/17/2019
• Est. Priority Date: 07/12/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: YERRAMALLI, Srinivas, LIU, Chih-Hao, KADOUS, Tamer
• Granted Patent: US 11,025,403 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 5/0003 Two-dimensional division time-code division H04J11/00, H04J13/00; for time-space division H04B7/0413, H04B7/0697
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/1438 Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

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

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; 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 a number of downlink (DL) subframes in the plurality of frames, and said determining the control channel search space comprises determining at least one of a size and a location of a first subset of the DL subframes allowed to carry the control information.

3. The method of claim 2, wherein said determining the search strategy comprises determining the maximum aggregation level for the control channel search space based on the size of the first subset of the DL subframes, and 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 the control channel search space scales with the number of DL subframes in the plurality of frames, and 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. A method of wireless communication of a user equipment (UE), comprising:

determining a time division duplex (TDD) frame structure of a plurality of frames, wherein a plurality of uplink (UL) subframes of the plurality of frames assigned for transmitting a plurality of UL resources associated with a control signaling is a function of the TDD frame structure;

determining a location of a scheduled UL resource within the TDD frame structure for communicating a type of the control signaling, the type of the control signaling including at least one of a random access channel, a uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR);

determining if the location of the scheduled UL resource for communicating at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource; and

communicating the at least one type of the control signaling using the scheduled UL resource over one of the plurality of UL subframes when the location of the scheduled UL resource for communicating the at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource.

9. The method of claim 8, wherein said communicating at least one type of the control signaling comprises transmitting at least one of the random access channel, the uplink control channel, the SRS, or the SR on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

10. The method of claim 8, further comprising transmitting a periodic channel state information (P-CSI) on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

11. The method of claim 8, further comprising:

determining a number of downlink (DL) subframes of the plurality of frames over which to average for a channel quality measurement based on the determined TDD frame structure;

measuring and averaging a channel quality indicator (CQI) over the determined number of DL subframes; and

transmitting the CQI on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

12. The method of claim 8, further comprising:

determining a number of downlink (DL) subframes of the plurality of frames over which to measure a positioning reference signal (PRS) based on the determined TDD frame structure;

measuring the PRS over the determined number of DL subframes to generate a PRS measurement; and

transmitting the PRS measurement on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

13. The method of claim 8, further comprising receiving information indicating a change in the TDD frame structure for a second set of frames that follow the plurality of frames.

14. 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; and

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

15. The apparatus of claim 14, wherein the received information about the TDD frame structure of the plurality of frames indicates a number of downlink (DL) subframes in the plurality of frames, and the processing system is further configured to determine at least one of a size and a location of a first subset of the DL subframes allowed to carry the control information for the control channel search space.

16. The apparatus of claim 15, wherein the processing system is configured to determine the search strategy by being configured to determine the maximum aggregation level for the control channel search space based on the size of the first subset of the DL subframes, 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.

17. The apparatus of claim 16, wherein the control channel search space scales with the number of DL subframes in the plurality of frames, and 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.

18. The apparatus of claim 15, 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.

19. The apparatus of claim 14, 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.

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

21. An apparatus for wireless communication, comprising:

a processing system, configured to;

determine a time division duplex (TDD) frame structure of a plurality of frames, wherein a plurality of uplink (UL) subframes of the plurality of frames assigned for transmitting a plurality of UL resources associated with a control signaling is a function of the TDD frame structure;

determine a location of a scheduled UL resource within the TDD frame structure for communicating a type of the control signaling, the control signaling including at least one of a random access channel, a uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR);

determining if the location of the scheduled UL resource for communicating at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource; and

communicate the at least one type of the control signaling using the scheduled UL resource over one of the plurality of UL subframes when the location of the scheduled UL resource for communicating the at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource.

22. The apparatus of claim 21, wherein the processing system is configured to communicate the at least one type of the control signaling by being configured to transmit at least one of the random access channel, the uplink control channel, the SRS, or the SR on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

23. The apparatus of claim 21, wherein the processing system is further configured to transmit a periodic channel state information (P-CSI) on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

24. The apparatus of claim 21, wherein the processing system is further configured to:

determine a number of downlink (DL) subframes of the plurality of frames over which to average for a channel quality measurement based on the determined TDD frame structure;

measure and average a channel quality indicator (CQI) over the determined number of DL subframes; and

transmit the CQI on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

25. The apparatus of claim 21, wherein the processing system is further configured to:

determine a number of downlink (DL) subframes of the plurality of frames over which to measure a positioning reference signal (PRS) based on the determined TDD frame structure;

measure the PRS over the determined number of DL subframes to generate a PRS measurement; and

transmit the PRS measurement on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

26. The apparatus of claim 21, wherein the processing system is further configured to receive information indicating a change in the TDD frame structure for a second set of frames that follow the plurality of frames.

27. 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; and

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

28. The apparatus of claim 27, wherein the received information about the TDD frame structure of the plurality of frames indicates a number of downlink (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 a size and a location of a first subset of the DL subframes allowed to carry the control information for the control channel search space.

29. The apparatus of claim 28, 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 the size of the first subset of the DL subframes, 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 maximum aggregation level.

30. The apparatus of claim 29, wherein the control channel search space scales with the number of DL subframes in the plurality of frames, and 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.

31. The apparatus of claim 28, 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.

32. The apparatus of claim 27, 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.

33. The apparatus of claim 27, wherein the control information comprises an expected TDD frame structure of a subsequent plurality of frames.

34. An apparatus for wireless communication, comprising:

means for determining a time division duplex (TDD) frame structure of a plurality of frames, wherein a plurality of uplink (UL) subframes of the plurality of frames assigned for transmitting a plurality of UL resources associated with a control signaling is a function of the TDD frame structure;

means for determining a location of a scheduled UL resource within the TDD frame structure for communicating a type of control signaling, the type of control signaling including at least one of a random access channel, a uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR);

means for determining if the location of the scheduled UL resource for communicating at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource; and

means for communicating the at least one type of the control signaling using the scheduled UL resource over one of the plurality of UL subframes when the location of the scheduled UL resource for communicating the at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource.

35. The apparatus of claim 34, wherein the means for communicating the at least one type of the control signaling is further configured to transmit at least one of the random access channel, the uplink control channel, the SRS, or the SR on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

36. The apparatus of claim 34, wherein the means for communicating the at least one type of the control signaling is further configured to transmit a periodic channel state information (P-CSI) on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

37. The apparatus of claim 34, wherein the means for determining the TDD frame structure of a plurality of frames is further configured to determine a number of downlink (DL) subframes of the plurality of frames over which to average for a channel quality measurement based on the determined TDD frame structure, wherein the apparatus further comprises means for measuring and averaging a channel quality indicator (CQI) over the determined number of DL subframes, and wherein the means for communicating the at least one type of the control signaling is further configured to transmit the CQI on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

38. The apparatus of claim 34, wherein the means for determining the TDD frame structure of a plurality of frames is further configured to determine a number of downlink (DL) subframes of the plurality of frames over which to measure a positioning reference signal (PRS) based on the determined TDD frame structure, wherein the apparatus further comprises means for measuring the PRS over the determined number of DL subframes to generate a PRS measurement, and wherein the means for communicating the at least one type of the control signaling is further configured to transmit the PRS measurement on one of the plurality of UL subframes assigned for transmitting the UL resource associated with the at least one of the access channel, the uplink control channel, the SRS, or the SR.

39. The apparatus of claim 34, wherein the means for determining the TDD frame structure of a plurality of frames is further configured to receive information indicating a change in the TDD frame structure for a second set of frames that follow the plurality of frames.

40. A computer program product, comprising:

a 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; and

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

41. A computer program product, comprising:

a computer-readable medium comprising code for;

determining a time division duplex (TDD) frame structure of a plurality of frames, wherein a plurality of uplink (UL) subframes of the plurality of frames assigned for transmitting a plurality of UL resources associated with a control signaling is a function of the TDD frame structure;

determining a location of a scheduled UL resource within the TDD frame structure for communicating a type of the control signaling, the type of the control signaling including at least one of a random access channel, a uplink control channel, a sounding reference signal (SRS), or a scheduling request (SR);

determining if the location of the scheduled UL resource for communicating at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource; and

communicating the at least one type of the control signaling using the scheduled UL resource over one of the plurality of UL subframes when the location of the scheduled UL resource for communicating the at least one type of the control signaling occurs on one of the plurality of UL subframes assigned for transmitting the scheduled UL resource.