METHOD AND APPARATUS FOR OPERATING MIMO MEASUREMENT REFERENCE SIGNALS AND FEEDBACK

• US 20160359538A1
• Filed: 05/24/2016
• Published: 12/08/2016
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rahman, Md Saifur, Onggosanusi, Eko, Noh, Hoondong, Zhang, Jianzhong
• Granted Patent: US 10,164,747 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0469 taking special antenna structures, e.g. cross polarized antennas into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI

Abstract

Methods and apparatuses for CSI reporting mechanisms are provided. A user equipment (UE) includes a transceiver configured to receive channel state information (CSI) process configuration information with a plurality of non-zero-power (NZP) CSI reference signal (CSI-RS) resource configurations. The UE includes a processor operably connected to the transceiver, the processor configured to calculate, in response to receipt of the configuration information, a CSI report associated with a CSI-RS type or a multiple-input multiple-output (MIMO) type. The transceiver is further configured to transmit the CSI report on an uplink channel. At least one of the NZP CSI-RS resource configurations corresponds to a beamformed type.

Claims

1. A user equipment (UE) comprising:

a transceiver configured to receive channel state information (CSI) process configuration information with a plurality of non-zero-power (NZP) CSI reference signal (CSI-RS) resource configurations; and

a processor operably connected to the transceiver, the processor configured to calculate, in response to receipt of the configuration information, a CSI report associated with a CSI-RS type or a multiple-input multiple-output (MIMO) type,

wherein the transceiver is further configured to transmit the CSI report on an uplink channel, and

wherein at least one of the NZP CSI-RS resource configurations corresponds to a beamformed type.

2. The UE of claim 1, wherein the CSI report is associated with the beamformed type and includes a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI) derived from a first codebook.

3. The UE of claim 2, wherein:

at least another of the NZP CSI-RS resource configurations corresponds to a non-precoded type,

the processor is further configured to calculate a CSI report associated with the non-precoded type, and

the CSI report associated with the non-precoded type includes a first PMI including one or two indices derived from a second codebook different from the first codebook associated with the beamformed type.

4. The UE of claim 3, wherein the CSI report associated with the non-precoded type further includes a recommended number of ports for the beamformed type.

5. The UE of claim 1, wherein:

the plurality of NZP CSI-RS resource configurations includes the at least one NZP CSI-RS resource configuration and one or more other NZP CSI-RS resource configurations, and

each of the one or more other NZP CSI-RS resource configurations is associated with a CSI report that includes a plurality of quantized channel coefficients measured from a corresponding CSI-RS resource.

6. The UE of claim 5, wherein the one or more other NZP CSI-RS resource configurations is associated with a non-precoded type.

7. The UE of claim 5, wherein the one or more other NZP CSI-RS resource configurations is associated with the beamformed type.

8. A base station (BS) comprising:

a processor configured to generate configuration information to configure a user equipment (UE) with a channel state information (CSI) process and configure the UE with a plurality of non-zero-power (NZP) CSI reference signal (CSI-RS) resource configurations; and

a transceiver operably connected to the processor, the transceiver configured to;

transmit the configuration information for the CSI process and the NZP CSI-RS resources; and

receive a CSI report associated with a CSI-RS type or a multiple-input multiple-output (MIMO) type in accordance with the configuration information,

wherein at least one of the NZP CSI-RS resource configurations corresponds to a beamformed type.

9. The BS of claim 8, wherein the CSI report associated is with the beamformed type and includes a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI) derived from a first codebook.

10. The BS of claim 9, wherein:

at least another of the NZP CSI-RS resource configurations corresponds to a non-precoded type,

the transceiver is further configured to receive a CSI report associated with the non-precoded type, and

the CSI report associated with the non-precoded type includes a first PMI including one or two indices derived from a second codebook different from the first codebook associated with the beamformed type.

11. The BS of claim 10, wherein the CSI report associated with the non-precoded type further includes a recommended number of ports for the beamformed type.

12. The BS of claim 8, wherein:

the plurality of NZP CSI-RS resource configurations includes the at least one NZP CSI-RS resource configuration and one or more other NZP CSI-RS resource configurations, and

each of the one or more other NZP CSI-RS resource configurations is associated with a CSI report that includes a plurality of quantized channel coefficients measured from a corresponding CSI-RS resource.

13. The BS of claim 12, wherein the one or more other NZP CSI-RS resource configurations is associated with the beamformed type.

14. A method for operating a user equipment (UE), the method comprising:

receiving, by the UE, channel state information (CSI) process configuration information with a plurality of non-zero-power (NZP) CSI reference signal (CSI-RS) resource configurations;

in response to receipt of the configuration information, calculating, by the UE, a CSI report associated with a CSI-RS type or a multiple-input multiple-output (MIMO) type; and

transmitting, by the UE, the CSI report on an uplink channel,

wherein at least one of the NZP CSI-RS resource configurations corresponds to a beamformed type.

15. The method of claim 14, wherein the CSI report is associated with the beamformed type and includes a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI) derived from a first codebook

16. The method of claim 15, wherein:

at least another of the NZP CSI-RS resource configurations corresponds to a non-precoded type,

the method further comprises calculating a CSI report associated with the non-precoded type, and

the CSI report associated with the non-precoded type includes a first PMI including one or two indices derived from a second codebook different from the first codebook associated with the beamformed type.

17. The method of claim 16, wherein the CSI report associated with the non-precoded type further includes a recommended number of ports for the beamformed type.

18. The method of claim 14, wherein:

the plurality of NZP CSI-RS resource configurations includes the at least one NZP CSI-RS resource configuration and one or more other NZP CSI-RS resource configurations, and

each of the one or more other NZP CSI-RS resource configurations is associated with a CSI report that includes a plurality of quantized channel coefficients measured from a corresponding CSI-RS resource.

19. The method of claim 18, wherein the one or more other NZP CSI-RS resource configurations is associated with a non-precoded type.

20. The method of claim 18, wherein the one or more other NZP CSI-RS resource configurations is associated with the beamformed type.