Providing a format indicator comprising rank indication and channel state information spatial domain resolution type

• US 10,554,266 B2
• Filed: 10/19/2018
• Issued: 02/04/2020
• Est. Priority Date: 11/03/2016
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Wang, Xiaoyi, Akoum, Salam, Ghosh, Arunabha
• Primary Examiner(s): Fotakis, Aristocratis
• Application Number:
  US16/165,444
• Publication Number:
  US 20190052321A1
• Time in Patent Office: 473 Days
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• 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: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 72/1273 of downlink data flows

Abstract

A user equipment can be configured to evaluate a reference signal from a network node and determine channel state information comprising a format indicator, wherein the format indicator comprises a rank indicator and the channel state information spatial resolution type. The user equipment can transmit to the network node the channel state information, which can be decoded by a network node to determine transmission scheduling parameters to be transmitted to the user equipment.

Claims

1. A network device, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

in response to transmitting a reference signal to a user equipment, receiving, from the user equipment, channel state information feedback comprising;

a first portion comprising a format indicator, the format indicator comprising a first data element comprising a channel state information spatial domain resolution type representative of a spatial domain resolution type of channel state information and a second data element comprising a rank indicator indicating a number of different data streams transmitted between the network device and the user equipment, and

a second portion comprising a remainder of the channel state information feedback; and

decoding the channel state information feedback, resulting in decoded channel state information feedback, the decoding comprising;

decoding the first portion, resulting in a decoded format indicator, and

based on the decoded format indicator, decoding the second portion.

2. The network device of claim 1, wherein the remainder comprises a third data element comprising a channel state indicator of channel state information used to select transmission parameters for transmissions between the network device and the user equipment.

3. The network device of claim 2, wherein the operations further comprise determining a transmission scheduling parameter of the transmission parameters based on the decoded channel state information feedback.

4. The network device of claim 3, wherein the transmission scheduling parameter comprises a modulation and coding parameter applicable to modulation and coding of the transmissions.

5. The network device of claim 3, wherein the operations further comprise transmitting, to the user equipment, the transmission scheduling parameter.

6. The network device of claim 1, wherein the remainder comprises a third data element comprising a channel quality indicator of channel quality applicable to a quality of a wireless communication channel between the network device and the user equipment.

7. The network device of claim 6, wherein the operations further comprise transmitting traffic data to the user equipment via the wireless communication channel.

8. The network device of claim 1, wherein the network device is operable to transmit a wireless signal to the user equipment using an antenna, and wherein the antenna is coupled to a radio frequency transmitter and a radio frequency receiver that respectively transmit and receive via a wireless communication channel that operates according to a multiple input multiple output protocol.

9. The network device of claim 1, wherein the spatial domain resolution type indicates a first spatial resolution as a default spatial domain resolution type applicable by default to data streams.

10. The network device of claim 1, wherein the spatial domain resolution type indicates a second spatial resolution higher than a first spatial resolution of a default spatial domain resolution type.

11. A method, comprising:

receiving, by a user equipment comprising a processor, a reference signal from a network device via an antenna coupled to a radio frequency transmitter and a radio frequency receiver;

determining, by the user equipment, channel state information based on the reference signal, the channel state information comprising;

a format indicator, the format indicator comprising a first data element comprising a channel state information spatial domain resolution type representative of a spatial domain resolution of the channel state information and a second data element comprising a rank indicator indicating a number of different transmission streams between the network device and the user equipment; and

transmitting, by the user equipment, channel state information feedback to the network device, wherein the channel state information feedback comprises a first portion comprising the format indicator and a second portion comprising a remainder of the channel state information feedback, wherein the transmitting the channel state information feedback to the network device enables the network device to decode the second portion using a result of decoding the first portion.

12. The method of claim 11, wherein the remainder comprises:

a third data element comprising a first indicator of channel state information used to select transmission parameters for transmissions on a channel between the network device and the user equipment, and

a fourth data element comprising a second indicator of channel quality applicable to a quality of the channel between the network device and the user equipment.

13. The method of claim 11, further comprising receiving, by the user equipment, transmission scheduling parameters from the network device, and wherein the transmission scheduling parameters were determined based on the channel state information feedback.

14. The method of claim 13, wherein the transmission scheduling parameters comprise a modulation and coding scheme applicable to modulation and coding of transmissions between the network device and the user equipment.

15. The method of claim 13, further comprising receiving, by the user equipment, traffic data from the network device based on the transmission scheduling parameters.

16. The method of claim 11, wherein the channel state information spatial domain resolution type indicates a first spatial resolution that is higher than a second spatial resolution that is used as a default spatial resolution.

17. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a network device, facilitate performance of operations, comprising:

transmitting a reference signal to a user equipment;

receiving channel state information from the user equipment, wherein the channel state information comprises channel state information feedback comprising;

a first portion of the channel state information feedback comprising a format indicator, the format indicator comprising;

a first data element comprising a spatial domain resolution type representative of a spatial domain resolution of the channel state information, and

a second data element comprising a rank indicator representative of a number of different transmission streams transmitted between the network device and the user equipment, and

a second portion comprising a remainder of the channel state information feedback;

decoding the channel state information feedback resulting in decoded feedback, comprising;

decoding the first portion resulting in a decoded format indicator, and

based on the decoded format indicator, decoding the second portion;

based on the decoded feedback, determining a transmission scheduling parameter, wherein the transmission scheduling parameter comprises a modulation and coding parameter applicable to modulation and coding of signals by the network device; and

transmitting, to the user equipment, the transmission scheduling parameter to configure the user equipment according to the transmission scheduling parameter.

18. The non-transitory machine-readable medium of claim 17, wherein the second portion comprises:

a third data element comprising a channel state information indicator used to select transmission parameters applicable to the signals transmitted between the network device and the user equipment via a channel, and

a fourth data element comprising an indication of channel quality applicable to a quality of the channel used to transmit the signals between the network device and the user equipment.

19. The non-transitory machine-readable medium of claim 17, wherein the reference signal comprises a beam-formed signal.

20. The non-transitory machine-readable medium of claim 17, wherein the reference signal comprises a non beam-formed signal.