METHOD AND APPARATUS FOR CODEBOOK DESIGN AND SIGNALING

• US 20160294454A1
• Filed: 03/24/2016
• Published: 10/06/2016
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rahman, Md. Saifur, Ji, Hyoungju, Onggosanusi, Eko, Ng, Boon Loong, Nam, Young-Han, Noh, Hoondong
• Granted Patent: US 10,110,286 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0479 for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]
• CPC Class Codes: H04B 7/0482 Adaptive codebooks
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/065 Variable contents, e.g. long-term or short-short

Abstract

Methods and apparatuses for codebook design and signaling are provided. A user equipment (UE) apparatus for codebook design and signaling includes a processor and a transceiver operably connected to the processor. The transceiver is configured to receive configuration information for a channel state information (CSI) process, receive configuration information for a CSI reference signal (CSI-RS) resource; receive configuration information for a MIMO type; and receive a plurality of codebook parameters when the MIMO type is non-precoded. A base station (BS) apparatus for codebook design and signaling includes a transceiver and a processor operably connected to the transceiver. The processor is configured to configure a UE with a CSI process and a CSI-RS resource, configure the UE with a MIMO type, and cause the transceiver to transmit configuration information for the CSI process, the CSI-RS resource, and the MIMO type to the UE.

Claims

1. A user equipment (UE) comprising:

a processor; and

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

receive configuration information for a channel state information (CSI) process;

receive configuration information for a CSI reference signal (CSI-RS) resource;

receive configuration information for a multiple-input multiple-output (MIMO) type; and

receive a plurality of codebook parameters when the MIMO type is non-precoded.

2. The UE of claim 1, wherein the codebook parameters include (i) a number of ports and oversampling factors for a first dimension and a second dimension and (ii) a codebook selection parameter.

3. The UE of claim 2, wherein each of the configuration information is transmitted via radio resource controller (RRC) signaling.

4. The UE of claim 2, wherein the codebook selection parameters correspond to a number of discrete Fourier transform (DFT) vectors in each of the first and second dimensions and at least one of the oversampling parameters is configurable to be either 4 or 8.

5. The UE of claim 2, wherein the processor is configured to calculate a CSI report assuming a first codebook derived from the codebook parameters when the MIMO type is non-precoded.

6. The UE of claim 5, wherein the processor is configured to calculate the CSI report assuming a second codebook when the MIMO type is beamformed.

7. The UE of claim 1, wherein the transceiver is configured to transmit a CSI report including (i) three precoding matrix indicator components when the MIMO type is non-precoded or (ii) one precoding matrix indicator component when the MIMO type is beamformed.

8. A base station (BS) comprising:

a transceiver; and

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

configure a user equipment (UE) with a channel state information (CSI) process and a CSI reference signal (CSI-RS) resource;

configure the UE with a multiple-input multiple-output (MIMO) type; and

cause the transceiver to transmit configuration information for the CSI process, the CSI-RS resource, and the MIMO type to the UE,

wherein the UE is configured with a plurality of codebook parameters when the MIMO type is non-precoded.

9. The BS of claim 8, wherein the codebook parameters include (i) a number of ports and oversampling factors for a first and a second dimension and (ii) a codebook selection parameter.

10. The BS of claim 9, wherein the configuration information is transmitted via radio resource controller (RRC) signaling.

11. The BS of claim 9, wherein the codebook selection parameters correspond to a number of discrete Fourier transform (DFT) vectors in each of the first and second dimensions and at least one of the oversampling parameters is configurable to be either 4 or 8.

12. The BS of claim 9, wherein:

a CSI report is calculated assuming a first codebook derived from the codebook parameters when the MIMO type is non-precoded; and

the CSI report is calculated assuming a second codebook when the MIMO type is beamformed.

13. The BS of claim 8, the transceiver is configured to receive a CSI report from the UE that includes (i) three precoding matrix indicator components when the MIMO type is non-precoded or (ii) one precoding matrix indicator component when the MIMO type is beamformed.

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

receiving, by the UE, configuration information for a channel state information (CSI) process;

receiving, by the UE, configuration information for a CSI reference signal (CSI-RS) resource;

receiving, by the UE, configuration information for a multiple-input multiple-output (MIMO) type; and

receiving, by the UE, a plurality of codebook parameters when the MIMO type is non-precoded.

15. The method of claim 14, wherein the codebook parameters include (i) a number of ports and oversampling factors for a first and a second dimension and (ii) a codebook selection parameter.

16. The method of claim 15, wherein the configuration information is transmitted via radio resource controller (RRC) signaling.

17. The method of claim 15, wherein the codebook selection parameters correspond to a number of discrete Fourier transform (DFT) vectors in each of the first and second dimensions and at least one of the oversampling parameters is configurable to be either 4 or 8.

18. The method of claim 15, further comprising calculating a CSI report assuming a first codebook derived from the codebook parameters when the MIMO type is non-precoded.

19. The method of claim 18, further comprising calculating the CSI report assuming a second codebook when the MIMO type is beamformed.

20. The method of claim 14, further comprising transmitting a CSI report including (i) three precoding matrix indicator components when the MIMO type is non-precoded or (ii) one precoding matrix indicator component when the MIMO type is beamformed.