Reporting of coefficients for channel state information

Patent metadata

Field	Value
Publication number	US-11863271-B2
Application number	US-202318118639-A
Country	US
Kind code	B2
Filing date	Mar 7, 2023
Priority date	Dec 12, 2018
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

The disclosure includes a host operating in a communication system to provide an over-the-top (OTT) service. The host includes processing circuitry configured to initiate transmission of user data to a network node in a cellular network to a user equipment (UE). The network node is configured to receive a CSI report for a downlink channel from a wireless device and transmit the user data from the host to the UE to provide the OTT service based on the CSI report. The CSI report includes a set of reported coefficients; an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and an indication of a payload size of the set of the reported coefficients.

First claim

What is claimed is:

1. A host configured to operate in a communication system to provide an over-the-top (OTT) service, the host comprising:
processing circuitry configured to provide user data; and
a network interface configured to initiate transmission of the user data to a network node in a cellular network for transmission to a user equipment (UE), the network node having a communication interface and processing circuitry configured to perform operations comprising:
receiving a CSI report for a downlink channel from a wireless device, the CSI report comprising:
a set of reported coefficients;
an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and
an indication of a payload size of the set of the reported coefficients, wherein:
in a quantization range for the set of reported coefficients, amplitude quantization values are

1

1
⁢
2
⁢
8

,

√{square root over (1/64)}, √{square root over (1/32)}, √{square root over (1/16)}, √{square root over (1/8)}, √{square root over (1/4)}, √{square root over (1/2)} and 1; and
these amplitude quantization values are associated with quantization indices 0, 1, 2, 3, 4, 5, 6 and 7, respectively; and
transmitting the user data from the host to the UE to provide the OTT service based on the CSI report.

2. The host of the claim 1 , wherein:
the processing circuitry of the host is configured to execute a host application that provides the user data to a client application associated with the host application, the client application configured to receive the transmission of user data from the host.

3. The host of claim 1 , wherein zero amplitude is not included in the quantization range for the set of reported coefficients.

4. The host of claim 1 , wherein the CSI report indicates a plurality of precoder vectors, the precoder vectors being expressed as linear combinations of spatial-domain vectors, wherein the coefficients for the spatial-domain vectors in the linear combinations of spatial-domain vectors are parameterized in the frequency-domain as linear combinations of a set of frequency-domain vectors and a set of coefficients for the frequency-domain vectors in the linear combinations of the set of frequency-domain vectors, wherein the reported coefficients are the coefficients for the frequency-domain vectors in the linear combinations of the set of frequency-domain vectors, and wherein the frequency-domain vectors are reported in the CSI report.

5. The host of claim 1 , wherein a CSI report configuration indicates a maximum number of non-zero coefficients that the wireless device can include in the CSI report.

6. The host of claim 1 , wherein the indication of the payload size of the set of the reported coefficients is encoded separately from the set of reported coefficients.

7. The host of claim 1 , wherein:
the CSI report comprises a CSI Part 1 and a CSI Part 2; and
the set of reported coefficients is included in the CSI Part 2.

8. The host of claim 1 , wherein the set of the reported coefficients comprises one or more of amplitude coefficients and phase coefficients.

9. A method implemented in a host configured to operate in a communication system to provide an over-the-top (OTT) service via the communication system, which further includes a network node and a user equipment (UE), the method comprising:
providing user data for the UE; and
initiating a transmission of the user data to the UE via a cellular network comprising the network node, wherein the network node performs operations comprising:
receiving a CSI report for a downlink channel from a wireless device, the CSI report comprising:
a set of reported coefficients;
an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and
an indication of a payload size of the set of the reported coefficients, wherein:
in a quantization range for the set of reported coefficients, amplitude quantization values are

1

1
⁢
2
⁢
8

,

√{square root over (1/64)}, √{square root over (1/32)}, √{square root over (1/16)}, √{square root over (1/8)}, √{square root over (1/4)}, √{square root over (1/2)} and 1; and
these amplitude quantization values are associated with quantization indices 0, 1, 2, 3, 4, 5, 6 and 7, respectively; and
transmitting the user data from the host to the UE to provide the OTT service based on the CSI report.

10. The method of claim 9 , further comprising:
at the host, executing a host application associated with a client application executing on the UE to receive the user data, associated with the OTT service, from the host application.

11. The method of claim 9 , further comprising:
at the host, receiving input data from a client application executing on the UE, wherein the user data is provided to the client application in response to the input data from a host application.

12. The method of claim 9 , wherein zero amplitude is not included in the quantization range for the set of reported coefficients.

13. The method of claim 9 , wherein a CSI report configuration indicates a maximum number of non-zero coefficients that the wireless device can include in the CSI report.

14. The method of claim 9 , wherein the indication of the payload size of the set of the reported coefficients is encoded separately from the set of reported coefficients.

15. A communication system configured to provide an over-the-top (OTT) service, the communication system comprising:
a host comprising:
processing circuitry configured to provide user data for a user equipment (UE), the user data being associated with the over-the-top service; and
a network interface configured to initiate transmission of the user data toward a cellular network node for transmission to the UE, the network node having a communication interface and processing circuitry configured to:
receive a CSI report for a downlink channel from a wireless device, the CSI report comprising:
a set of reported coefficients;
an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and
an indication of a payload size of the set of the reported coefficients, wherein:
in a quantization range for the set of reported coefficients, amplitude quantization values are

1

Assignees

• Ericsson Telefon Ab L M

Inventors

• Faxér Sebastian
• Timo Roy
• Wernersson Niklas
• Girnyk Maksym
• Wang Zhao

Classifications

• H04B7/0478

  Special codebook structures directed to feedback optimisation · CPC title

• H04B7/0481

  using subset selection of codebooks · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/0645 Primary

  Variable feedback · CPC title

• H04B7/063

  Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection · CPC title