Channel State Measurement and Reporting

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 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.

29. The UE of claim 28 , wherein the valid downlink subframe is in a set of subframes for a channel measurement for the Type 2 CSI report.

30. The UE of claim 28 , wherein the valid downlink subframe is in a set of subframes in which the non-zero power CSI reference signal is configured.

31. The UE of claim 28 , 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.

32. The UE of claim 28 , wherein the Type 2 CSI report is a periodic CSI report.

33. The UE of claim 32 , wherein Type 2 CSI reporting is configured in a CSI process configuration.

34. The UE of claim 28 , wherein the Type 2 CSI report is an aperiodic CSI report.

35. The UE of claim 34 , wherein a field in a downlink control information (DCI) specifies whether Type 2 aperiodic CSI reporting is triggered.

36. The UE of claim 28 , wherein the Type 2 CSI report corresponds to a configured CSI process.

37. The UE of claim 1 , wherein a downlink subframe is determined to be valid based, in part, on whether it is a multimedia broadcast/multicast service single-frequency network (MBSFN) frame.