Channel state measurement and reporting

Patent metadata

Field	Value
Publication number	US-9271279-B2
Application number	US-201313891162-A
Country	US
Kind code	B2
Filing date	May 9, 2013
Priority date	May 9, 2013
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A method for reporting uplink control information (UCI) on a user equipment (UE) is described. A Type 2 channel state information (CSI) report is generated for a CSI reference resource. The Type 2 CSI report is sent to a base station. The Type 2 CSI report is computed from a channel measurement based on a non-zero power reference signal on a single subframe within a configured CSI-RS resource associated with a CSI process.

First claim

What is claimed is:

1. A method for receiving uplink control information (UCI), comprising:
receiving a first channel state information (CSI) report for a CSI reference resource from a user equipment (UE) if triggered; and
receiving a second CSI report for the CSI reference resource from the UE if triggered,
wherein the second CSI report is computed from a channel measurement based on only a non-zero power CSI reference signal only on a single subframe within a configured CSI reference signal resource associated with a CSI process, wherein the first CSI report is computed from a channel measurement based on only non-zero power CSI reference signals within a configured CSI reference signal resource associated with a CSI process based on an unrestricted observation interval in time and frequency, wherein the single subframe is a subframe of the CSI reference resource, and the CSI reference resource for the second CSI report reported in uplink subframe n is defined by a valid downlink subframe n-k.

2. The method of claim 1 , wherein the valid downlink subframe is in a set of subframes for a channel measurement for the Type 2 CSI report.

3. The method of claim 1 , wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured.

4. The method of claim 1 , wherein the valid downlink subframe is in a set of subframes for Type 2 channel measurement if the set of subframes for Type 2 channel measurement is configured, and wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured if the set of subframes for Type 2 channel measurement is not configured.

5. The method of claim 1 , wherein the Type 2 CSI report is a periodic CSI report.

6. The method of claim 5 , wherein Type 2 CSI reporting is configured in a CSI process configuration.

7. The method of claim 1 , wherein the Type 2 CSI report is an aperiodic CSI report.

8. The method of claim 7 , wherein a field in a downlink control information (DCI) specifies whether Type 2 aperiodic CSI reporting is triggered.

9. The method of claim 1 , wherein the Type 2 CSI report corresponds to a configured CSI process.

10. A method for reporting uplink control information (UCI), comprising:
transmitting a first channel state information (CSI) report for a CSI reference resource from a user equipment (UE) if triggered; and
transmitting a second CSI report for the CSI reference resource if triggered,
wherein the second CSI report is computed from a channel measurement based on only a non-zero power CSI reference signal only on a single subframe within a configured CSI reference signal resource associated with a CSI process, wherein the first CSI report is computed from a channel measurement based on only non-zero power CSI reference signals within a configured CSI reference signal resource associated with a CSI process based on an unrestricted observation interval in time and frequency, wherein the single subframe is a subframe of the CSI reference resource, and the CSI reference resource for the second CSI report reported in uplink subframe n is defined by a valid downlink subframe n-k.

11. The method of claim 10 , wherein the valid downlink subframe is in a set of subframes for a channel measurement for the Type 2 CSI report.

12. The method of claim 10 , wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured.

13. The method of claim 10 , wherein the valid downlink subframe is in a set of subframes for Type 2 channel measurement if the set of subframes for Type 2 channel measurement is configured, and wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured if the set of subframes for Type 2 channel measurement is not configured.

14. The method of claim 10 , wherein the Type 2 CSI report is a periodic CSI report.

15. The method of claim 14 , wherein Type 2 CSI reporting is configured in a CSI process configuration.

16. The method of claim 10 , wherein the Type 2 CSI report is an aperiodic CSI report.

17. The method of claim 16 , wherein a field in a downlink control information (DCI) specifies whether Type 2 aperiodic CSI reporting is triggered.

18. The method of claim 10 , wherein the Type 2 CSI report corresponds to a configured CSI process.

19. A base station configured for receiving uplink control information (UCI), comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory, the instructions being executable to:
receive a first channel state information (CSI) report for a CSI reference resource from a user equipment (UE) if triggered; and
receive a second CSI report for the CSI reference resource from the UE if triggered,
wherein the second CSI report is computed from a channel measurement based on only a non-zero power CSI reference signal only on a single subframe within a configured CSI reference signal resource associated with a CSI process, wherein the first CSI report is computed from a channel measurement based on only non-zero power CSI reference signals within a configured CSI reference signal resource associated with a CSI process based on an unrestricted observation interval in time and frequency, wherein the single subframe is a subframe of the CSI reference resource, and the CSI reference resource for the second CSI report reported in uplink subframe n is defined by a valid downlink subframe n-k.

20. The base station of claim 19 , wherein the valid downlink subframe is in a set of subframes for a channel measurement for the Type 2 CSI report.

21. The base station of claim 19 , wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured.

22. The base station of claim 19 , wherein the valid downlink subframe is in a set of subframes for Type 2 channel measurement if the set of subframes for Type 2 channel measurement is configured, and wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured if the set of subframes for Type 2 channel measurement is not configured.

23. The base station of claim 19 , wherein the Type 2 CSI report is a periodic CSI report.

24. The base station of claim 23 , wherein Type 2 CSI reporting is configured in a CSI process configuration.

25. The base station of claim 19 , wherein the Type 2 CSI report is an aperiodic CSI report.

26. The base station of claim 25 , wherein a field in a downlink control information (DCI) specifies whether Type 2 aperiodic CSI reporting is triggered.

27. The base station of claim 23 , wherein the Type 2 CSI report corresponds to a configured CSI process.

28. A user equipment (UE) configured for reporting uplink control information (UCI), comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory, the instructions being executable to:
transmit a first channel state information (CSI) report for a CSI reference resource from a user equipment (UE) if triggered; and
transmit a second CSI report for the CSI reference resource if triggered,
wherein the second CSI report is computed from a channel measurement based on only a non-zero power CSI reference si

Assignees

• Sharp Lab Of America Inc

Inventors

• Khoshnevis Ahmad
• Yamada Shohei
• Yin Zhanping

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · 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

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/0078

  Timing of allocation · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title