Techniques for handling overlapping sets of downlink control channel resources

Patent metadata

Field	Value
Publication number	US-11463192-B2
Application number	US-202016799515-A
Country	US
Kind code	B2
Filing date	Feb 24, 2020
Priority date	Apr 3, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

Techniques for monitoring for control information in sets of downlink control channel resources are described, where multiple sets of downlink control channel resources may overlap. The described techniques include monitoring for one or more search spaces in a set of downlink control channel resources by rate matching downlink control channel resources independently of other sets of downlink control channel resources. Alternatively, overlapping sets of downlink control channel resources may be rate-matched accounting for reference signals of overlapping sets of downlink control channel resources.

First claim

What is claimed is:

1. A method of wireless communication at a user equipment (UE), comprising:
identifying a first control resource set and a second control resource set, wherein the first control resource set and the second control resource set comprise UE-specific control resource sets;
monitoring a first search space of the first control resource set based at least in part on a first spatial processing configuration associated with the first control resource set, wherein monitoring the first search space comprises rate-matching first downlink control channel resources of the first control resource set for the first search space independently of the second control resource set;
monitoring a second search space of the second control resource set based at least in part on a second spatial processing configuration associated with the second control resource set that is different than the first spatial processing configuration, wherein monitoring the second search space comprises rate-matching second downlink control channel resources of the second control resource set for the second search space independently of the first control resource set; and
communicating with a base station based at least in part on control information identified as a result of the monitoring of the first search space or the monitoring of the second search space.

2. The method of claim 1 , further comprising:
determining that at least one reference signal associated with the first control resource set is in a portion of resources of the first control resource set that overlap with resources of the second control resource set based at least in part on a type of the first control resource set and a type of the second control resource set, wherein monitoring the first search space or monitoring the second search space is based at least in part on the determining.

3. The method of claim 2 , further comprising:
spatially processing the at least one reference signal associated with the first control resource set based at least in part on the first spatial processing configuration and determining that the at least one reference signal is in the portion of resources that overlap.

4. The method of claim 2 , wherein a reference signal associated with the second control resource set coincides with the at least one reference signal associated with the first control resource set.

5. The method of claim 1 , further comprising:
identifying that the first control resource set and the second control resource set comprise the UE-specific control resource sets, wherein the first spatial processing configuration and the second spatial processing configuration are based at least in part on the first control resource set and the second control resource set comprising the UE-specific control resource sets.

6. The method of claim 1 , wherein the first spatial processing configuration and the second spatial processing configuration are based at least in part on the first control resource set and the second control resource set comprising the UE-specific control resource sets.

7. The method of claim 1 , further comprising:
determining that the first control resource set is configured on resources that are spatially orthogonal to resources of the second control resource set, wherein monitoring the first search space or monitoring the second search space is based at least in part on the determining.

8. The method of claim 1 , wherein:
the first spatial processing configuration comprises a first beamforming configuration; and
the second spatial processing configuration comprises a second beamforming configuration different than the first beamforming configuration.

9. The method of claim 1 , wherein:
the first spatial processing configuration comprises a first space division multiplexing configuration; and
the second spatial processing configuration comprises a second space division multiplexing configuration different than the first space division multiplexing configuration.

10. The method of claim 1 , further comprising:
identifying first locations for a first set of reference signals associated with the first control resource set, wherein the monitoring the first search space comprises rate-matching the first downlink control channel resources around the first locations; and
identifying second locations for a second set of reference signals associated with the second control resource set, wherein the monitoring the second search space comprises rate-matching the second downlink control channel resources around the second locations.

11. The method of claim 10 , wherein the first locations coincide with the second locations within resources of the first control resource set that overlap with resources of the second control resource set.

12. The method of claim 10 , wherein the first locations are non-coincident with the second locations within resources of the first control resource set that overlap with resources of the second control resource set.

13. The method of claim 12 , wherein the monitoring the first search space comprises:
rate-matching the first downlink control channel resources to the second locations within resources of the first control resource set that overlap with resources of the second control resource set based at least in part on a type of the first control resource set and a type of the second control resource set.

14. The method of claim 10 , wherein the monitoring the first search space comprises:
demodulating one or more downlink control channel candidates of the first search space within resources of the first control resource set that overlap with resources of the second control resource set based at least in part on the first set of reference signals.

15. The method of claim 1 , further comprising:
demodulate one or more downlink control channel candidates of the first search space within resources of the first control resource set that overlap with resources of the second control resource set using a first set of reference signals.

16. A method for wireless communication at a user equipment (UE), comprising:
identifying a first control resource set configured for downlink control information for the UE, the first control resource set having first locations for a first set of reference signals, wherein the first control resource set comprises a first UE-specific control resource set;
identifying a second control resource set, wherein resources of the first control resource set at least partially overlap with resources of the second control resource set, and wherein second locations for a second set of reference signals of the second control resource set are non-coincident with the first locations within the resources of the first control resource set that overlap with the resources of the second control resource set, wherein the second control resource set comprises a second UE-specific control resource set;
monitoring a first search space of the first control resource set based at least in part on a first spatial processing configuration associated with the first control resource set that is different than a second spatial processing configuration associated with the second control resource set, wherein monitoring the first search space comprises rate-matching first downlink control channel resources of the first control resource set for the first search space independently of the second control resource set; and
communicating with a base station based at least in part on control information identified as a result of the monitoring the first search space.

17. The method of clai

Assignees

• Qualcomm Inc

Inventors

• Lee Heechoon
• Gaal Peter
• Sun Jing
• Chen Wanshi

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/0067

  Rate matching (H04L1/0013 and H04L1/08 take precedence) · CPC title

• H04L1/0013 Primary

  Rate matching, e.g. puncturing or repetition of code symbols · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title