Method and apparatus for channel state information (CSI) reporting

• US 10,411,868 B2
• Filed: 02/20/2017
• Issued: 09/10/2019
• Est. Priority Date: 02/24/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Onggosanusi, Eko, Rahman, Md. Saifur, Noh, Hoondong, Kwak, Youngwoo
• Primary Examiner(s): Cho, Un C
• Assistant Examiner(s): Mak, Peter K
• Application Number:
  US15/437,363
• Publication Number:
  US 20170244533A1
• Time in Patent Office: 932 Days
• 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 7/0486 taking channel rank into account
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• 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 and a processor operably connected to the transceiver. The transceiver is configured to receive configuration information including a channel state information (CSI) process, a first multiple-input multiple-output (MIMO) Type, and a second MIMO Type. The processor is configured to calculate and report, in response to receipt of the configuration information, a CSI for each of the first and second MIMO Types. The second MIMO Type is Class B and is associated with a single non-zero-power CSI reference signal (NZP CSI-RS) resource that includes at most 8 antenna ports.

Claims

1. A user equipment (UE) comprising:

a transceiver configured to receive configuration information including a channel state information (CSI) process, a first multiple-input multiple-output (MIMO) Type, and a second MIMO Type; and

a processor operably connected to the transceiver, the processor configured to calculate and report, in response to receipt of the configuration information, a CSI for each of the first and second MIMO Types; and

wherein the second MIMO Type is Class B, corresponds to a beamformed CSI-RS, and is associated with a single CSI reference signal (CSI-RS) resource that includes at most 8 antenna ports,

wherein the first MIMO Type is Class A, corresponds to a non-precoded CSI-RS, and is associated with a single CSI-RS resource that includes at least 8 antenna ports,

wherein the CSI for the first MIMO Type includes a first precoding matrix indicator (PMI) i₁ from a codebook including at least two PMIs (i₁, i₂) and a rank indicator (RI), and

wherein the RI is either 1 or 3.

2. The UE of claim 1, wherein the CSI for the first MIMO Type is calculated in reference to the CSI-RS resource for the first MIMO Type (i₁, i₂).

3. The UE of claim 2, wherein the RI is associated with the first MIMO Type.

4. The UE of claim 2, wherein the CSI for the second MIMO Type is calculated in reference to the CSI-RS resource for the second MIMO Type and includes a channel quality indicator (CQI), a PMI, and a RI.

5. The UE of claim 2, wherein the CSI for the first MIMO Type and the CSI for the second MIMO Type are calculated independently of each other.

6. The UE of claim 1, wherein the CSI for the first MIMO Type includes only a CSI-RS resource indicator (CRI).

7. A base station (BS) comprising:

a processor configured to;

generate, for a UE, configuration information including a channel state information (CSI) process, a first multiple-input multiple-output (MIMO) Type, and a second MIMO Type;

generate, for the UE, a CSI Reference Signal (CSI-RS) setting and a CSI-RS associated with the CSI-RS setting, the CSI-RS setting and associated CSI-RS corresponding to each of the first and second MIMO Types; and

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

transmit, to the UE, the configuration information and the CSI-RS corresponding to each of the first and second MIMO Types; and

receive, from the UE, a CSI report corresponding to each of the first and second MIMO Types on an uplink channel;

wherein the second MIMO Type is Class B, corresponds to a beamformed CSI-RS, and is associated with a single CSI-RS resource that includes at most 8 antenna ports, and

wherein the first MIMO Type is Class A, corresponds to a non-precoded CSI-RS, and is associated with a single CSI-RS resource which includes at least 8 antenna ports,

wherein the CSI for the first MIMO Type includes a first precoding matrix indicator (PMI) i₁ from a codebook including at least two PMIs (i₁, i₂) and a rank indicator (RI), and

wherein the RI is either 1 or 3.

8. The BS of claim 7, wherein:

the CSI report includes a CSI for each of the first and second MIMO Types, and

the CSI for the first MIMO Type is calculated in reference to the CSI-RS resource for the first MIMO Type i₁ (i₁, i₂).

9. The BS of claim 8, wherein the CSI for the second MIMO Type is calculated in reference to the CSI-RS resource for the second MIMO Type and includes a channel quality indicator (CQI), a PMI, and a RI.

10. The BS of claim 9, wherein the CSI for the first MIMO Type and the CSI for the second MIMO Type are calculated independently of each other.

11. The BS of claim 10, wherein the CSI for the first MIMO Type includes only a CSI-RS resource indicator (CRI).

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

receiving, by the UE, configuration information including a channel state information (CSI) process, a first multiple-input multiple-output (MIMO) Type, and a second MIMO Type; and

in response to receipt of the configuration information, calculating and reporting, by the UE, a CSI for each of the first and second MIMO Types;

wherein the second MIMO Type is Class B, corresponds to a beamformed CSI-RS, and is associated with a single CSI reference signal (CSI-RS) resource which includes at most 8 antenna ports,

wherein the first MIMO Type is Class A, corresponds to a non-precoded CSI-RS, and is associated with a single CSI-RS resource which includes at least 8 antenna ports,

wherein the CSI for the first MIMO Type includes a first precoding matrix indicator (PMI) i₁ from a codebook including at least two PMIs (i₁, i₂) and a rank indicator (RI), and

wherein the RI is either 1 or 3.

13. The method of claim 12, wherein the CSI for the first MIMO Type is calculated in reference to the CSI-RS resource for the first MIMO Type i₁ (i₁, i₂).

14. The method of claim 13, wherein the RI is either 1 or 3.

15. The method of claim 13, wherein the CSI for the second MIMO Type is calculated in reference to the CSI-RS resource for the second MIMO Type and includes a channel quality indicator (CQI), a PMI, and a RI.

16. The method of claim 13, wherein the CSI for the first MIMO Type and the CSI for the second MIMO Type are calculated independently of each other.

17. The method of claim 12, wherein the CSI for the first MIMO Type includes only a CSI-RS Resource Indicator (CRI).