Granted Patent B2

US 12,250,046 · App. 18/520,202 · Granted Mar 11, 2025

Inventors: Alexei Davydov (Nizhny Novogorod, RU); Sameer Pawar (Santa Clara, CA); Wook Bong Lee (San Jose, CA); Yushu Zhang (Beijing, CN); Victor Sergeev (Nizhny Novgorod, RU); Joonyoung Cho (Portland, OR); Dmitry Dikarev (Nizhny Novgorod, RU)

Assignee: Apple Inc.

H04B7/0658H04B7/0626H04B7/0632H04B7/0634

Abstract

Claims (76)

1. A base station (BS), comprising

circuitry configured to:

identify a transmission associated with a rank indicator (RI) value received from a user equipment (UE);

determine channel state information (CSI) from the transmission; and

verify validity of the CSI based on a characteristic of the transmission; and

a memory that stores the CSI.

2. The base station of claim 1 ,

wherein to determine the CSI, the circuitry is further configured to decode a CSI report via a decoding procedure associated with a certain RI value to produce the CSI, and

wherein the transmission comprises the CSI report.

3. The base station of claim 1 , wherein to verify the validity of the CSI, the circuitry is further configured to compare the CSI with one or more cyclic redundancy check (CRC) bits to determine the validity of the CSI.

4. The base station of claim 3 , wherein:

the circuitry, in response to determination that the CSI is invalid, is further configured to:

decode the CSI report via one or more other decoding procedures to produce one or more decoded CSI reports, wherein each of the one or more other decoding procedures is associated with other corresponding RI values; and

compare CSI of each of the decoded CSI reports with the one or more CRC bits to determine a one of the decoded CSI reports that is valid; and

wherein the memory stores the CSI of the one of the decoded CSI reports.

5. The base station of claim 1 , wherein:

the transmission comprises a demodulation reference signal (DMRS), and

to determine the CSI, the circuitry is further configured to compare a sequence of the DMRS with a DMRS sequence associated with a certain RI value.

6. The base station of claim 5 , wherein to verify the validity of the CSI, the circuitry is further configured to:

determine a signal to interference and noise ratio (SINR) associated with the DMRS sequence based on channel estimation; and

compare the SINR to one or more SINRs associated with other DMRS sequences to determine the validity of the CSI.

7. The base station of claim 6 , wherein:

the circuitry, in response to determination that the CSI is invalid, is further configured to:

determine SINRs associated with each of the other DMRS sequences;

identify one DMRS sequence of the other DMRS sequences with a highest SINR; and

determine an RI associated with the one DMRS sequence; and

wherein the memory stores the RI associated with the one DMRS sequence.

8. A method of operating a base station (BS), comprising:

identifying a transmission associated with a rank indicator (RI) value received from a user equipment (UE);

determining channel state information (CSI) from the transmission;

verifying validity of the CSI based on a characteristic of the transmission; and

storing the CSI.

9. The method of claim 8 ,

wherein determining the CSI further comprises decoding a CSI report via a decoding procedure associated with a certain RI value to produce the CSI, and

wherein the transmission comprises the CSI report.

10. The method of claim 8 , wherein verifying the validity of the CSI further comprises comparing the CSI with one or more cyclic redundancy check (CRC) bits to determine the validity of the CSI.

11. The method of claim 10 , further comprising:

in response to determining that the CSI is invalid, decoding the CSI report via one or more other decoding procedures to produce one or more decoded CSI reports, wherein each of the one or more other decoding procedures is associated with other corresponding RI values;

in response to determining that the CSI is invalid, comparing CSI of each of the decoded CSI reports with the one or more CRC bits to determine a one of the decoded CSI reports that is valid; and

storing the CSI of the one of the decoded CSI reports.

12. The method of claim 8 , wherein:

the transmission comprises a demodulation reference signal (DMRS), and

determining the CSI further comprises comparing a sequence of the DMRS with a DMRS sequence associated with a certain RI value.

13. The method of claim 12 , wherein verifying the validity of the CSI further comprises:

determining a signal to interference and noise ratio (SINR) associated with the DMRS sequence based on channel estimation; and

comparing the SINR to one or more SINRs associated with other DMRS sequences to determine the validity of the CSI.

14. The method of claim 13 , further comprising:

in response to determining that the CSI is invalid, determining SINRs associated with each of the other DMRS sequences;

in response to determining that the CSI is invalid, identifying one DMRS sequence of the other DMRS sequences with a highest SINR;

in response to determining that the CSI is invalid, determining an RI associated with the one DMRS sequence; and

storing the RI associated with the one DMRS sequence.

15. A non-transitory computer-readable medium comprising instructions to cause a base station (BS), upon execution of the instructions by one or more processors of the BS, to perform one or more operations, the operations comprising:

identifying a transmission associated with a rank indicator (RI) value received from a user equipment (UE);

determining channel state information (CSI) from the transmission;

verifying validity of the CSI based on a characteristic of the transmission; and

storing the CSI to a memory.

16. The non-transitory computer-readable medium of claim 15 ,

wherein determining the CSI further comprises decoding a CSI report via a decoding procedure associated with a certain RI value to produce the CSI, and

wherein the transmission comprises the CSI report.

17. The non-transitory computer-readable medium of claim 15 , wherein verifying the validity of the CSI further comprises comparing the CSI with one or more cyclic redundancy check (CRC) bits to determine the validity of the CSI.

18. The non-transitory computer-readable medium of claim 17 , wherein the operations further comprise:

in response to determining that the CSI is invalid, decoding the CSI report via one or more other decoding procedures to produce one or more decoded CSI reports, wherein each of the one or more other decoding procedures is associated with other corresponding RI values;

in response to determining that the CSI is invalid, comparing CSI of each of the decoded CSI reports with the one or more CRC bits to determine a one of the decoded CSI reports that is valid; and

storing the CSI of the one of the decoded CSI reports.

19. The non-transitory computer-readable medium of claim 15 , wherein:

the transmission comprises a demodulation reference signal (DMRS);

determining the CSI further comprises comparing a sequence of the DMRS with a DMRS sequence associated with a certain RI value; and

verifying the validity of the CSI further comprises:

determining a signal to interference and noise ratio (SINR) associated with the DMRS sequence based on channel estimation; and

comparing the SINR to one or more SINRs associated with other DMRS sequences to determine the validity of the CSI.

20. The non-transitory computer-readable medium of claim 19 ,

wherein the operations further comprise:

in response to determining that the CSI is invalid, determining SINRs associated with each of the other DMRS sequences;

in response to determining that the CSI is invalid, identifying one DMRS sequence of the other DMRS sequences with a highest SINR;

in response to determining that the CSI is invalid, determining an RI associated with the one DMRS sequence; and

storing the RI associated with the one DMRS sequence.

Continuity (5)

References Cited (43)