PROVIDING A FORMAT INDICATOR COMPRISING RANK INDICATION AND CHANNEL STATE INFORMATION SPATIAL DOMAIN RESOLUTION TYPE

• US 20200136685A1
• Filed: 01/02/2020
• Published: 04/30/2020
• 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
• Granted Patent: US 10,951,277 B2
• Time in Patent Office: 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;

receiving, from a user equipment, channel state information feedback comprising a first portion comprising;

a format indicator indicating a channel state information spatial domain resolution type representative of a spatial domain resolution type of channel state information, and

a rank indicator indicating how many different data streams are used for transmissions between the network device and the user equipment; and

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

decoding the first portion of the channel state information feedback, resulting in a decoded format indicator, and

using the decoded format indicator to decode a second portion of the channel state information feedback.

2. The network device of claim 1, wherein the second portion comprises a channel state indicator of the channel state information used to select transmission parameters for the transmissions.

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 used to modulate and encode 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 second portion comprises a channel quality indicator indicative of 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 that is coupled to a radio frequency transmitter and a radio frequency receiver that respectively transmit and receive wireless communications 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:

determining, by a user equipment comprising a processor, channel state information based on a reference signal received from a network device, the channel state information comprising;

a format indicator comprising a channel state information spatial domain resolution type representative of a spatial domain resolution of the channel state information, and

a rank indicator that indicates how many different transmission streams are used for transmissions 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 other than the first portion, wherein the transmitting the channel state information feedback to the network device enables the network device to decode the second portion using a result obtained from decoding the first portion.

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

a channel state information indicator used to select transmission parameters for the transmissions, and

a channel quality indicator 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 parameter usable to modulate and encode the transmissions.

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:

receiving, from a user equipment, channel state information feedback comprising a first portion of channel state information feedback comprising;

a format indicator indicating a spatial domain resolution type representative of a spatial domain resolution of the channel state information, and

a rank indicator representative of how many different transmission streams are used for transmissions between the network device and the user equipment; and

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

decoding the first portion of the channel state information feedback, resulting in a decoded format indicator, and

using the decoded format indicator to decode a second portion of the channel state information feedback.

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

a channel state information indicator used to select transmission parameters applicable to the transmissions, and

an indication of channel quality indicative of a quality of a channel used for the transmissions.

19. The non-transitory machine-readable medium of claim 17, wherein the operations further comprise transmitting a reference signal to the user equipment, and wherein the reference signal comprises a beam-formed signal.

20. The non-transitory machine-readable medium of claim 17, wherein the operations further comprise transmitting a reference signal to the user equipment, and wherein the reference signal comprises a non beam-formed signal.