# US 2019/0173553 A1 · Method for reporting channel state information by terminal in wireless communication system and device for supporting same

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- Number: US 2019/0173553 A1
- Document ID: US20190173553A1
- Status: Published application
- Kind: A1
- Application number: 16/321,374
- Filed: 2017-07-28
- Published: 2019-06-06
- Earliest claimed: 2016-07-29
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc
- Inventors: Hanjun PARK; Kijun KIM; Eunsun KIM; Jiwon KANG; Kunil YUM; Seungmin LEE
- Web page: https://patentgrep.com/patent/US20190173553A1

## CPC

- H04B 7/0417: Feedback systems
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04B 7/06: at the transmitting station
- H04B 7/0617: {for beam forming}
- H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection}
- H04B 17/24: with feedback of measurements to the transmitter
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 27/2607: {Cyclic extensions}
- H04W 56/001: {Synchronization between nodes}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Disclosed are a method for reporting channel state information by a terminal and, a device for supporting the same. More particularly, disclosed are a method in which a base station transmits a signal using a plurality of analog beams, and a terminal calculates channel state information feedback and reports the channel state information to the base station, in response to the base station, and a device for supporting the same.

## Claims

### Claim at position 1

1-16. (canceled)

### Claim 17

A method of transmitting channel state information (CSI) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station (BS), information on at least one CSI resource, wherein the information further comprises information on at least one analog beam; and,
transmitting, to the BS, CSI feedback based on a certain number of CSI resource,
wherein the at least one analog beam is related with the at least one CSI resource, respectively, and,
wherein the certain number of the CSI resource is determined from among the at least one CSI resource based on maximum CSI calculation capability of the UE.

### Claim 18 (depends on 17)

The method of claim 17, wherein transmitting the CSI feedback comprises:
assigning, based on the maximum CSI calculation capability of the UE, a number of the at least one CSI resource and a predetermined criterion, priority to at least one CSI resource from among the at least one CSI resource; and,
transmitting the CSI feedback based on the certain number of the CSI resource determined based on the priority.

### Claim 19 (depends on 18)

The method of claim 18, wherein the predetermined criterion comprises:
a serving beam index for at least one analog beam, or
a reception sensitivity of the UE for at least one analog beam.

### Claim 20 (depends on 19)

The method of claim 19, wherein the reception sensitivity is related with reference signal received power (RSRP) measured based on the beam-reference signal (BRS) or radio resource management-reference signal (RRM-RS) to which the at least one analog beam is applied.

### Claim 21 (depends on 18)

The method of claim 18, wherein the CSI feedback is transmitted based on CSI reporting type determined based on the priority.

### Claim 22 (depends on 17)

The method of claim 17, wherein the at least one CSI resource comprises at least one channel state information-reference signal (CSI-RS) resource and at least one channel state information-interference measurement (CSI-IM) resource.

### Claim 23

A user equipment (UE) for transmitting channel state information (CSI) in a wireless communication system, the UE comprising:
a transmitter;
a receiver; and
at least one processor coupled with the transmitter and the receiver,
wherein the at least one processor is configured to:
receive, from a base station (BS), information on at least one CSI resource, wherein the information further comprises information on at least one analog beam;
transmit, to the BS, CSI feedback based on a certain number of CSI resource,
wherein the at least one analog beam is related with the at least one CSI resource, respectively, and,
wherein the certain number of the CSI resource is determined from among the at least one CSI resource based on maximum CSI calculation capability of the UE.

### Claim 24 (depends on 23)

The UE of claim 23, wherein the at least one processor is further configured to:
assign, based on the maximum CSI calculation capability of the UE, a number of the at least one CSI resource and a predetermined criterion, priority to at least one CSI resource from among the at least one CSI resource; and,
transmit the CSI feedback based on the certain number of the CSI resource determined based on the priority.

### Claim 25 (depends on 24)

The UE of claim 24, wherein the predetermined criterion comprises:
a serving beam index for at least one analog beam, or
a reception sensitivity of the UE for at least one analog beam.

### Claim 26 (depends on 25)

The UE of claim 25, wherein the reception sensitivity is related with reference signal received power (RSRP) measured based on the beam-reference signal (BRS) or radio resource management-reference signal (RRM-RS) to which the at least one analog beam is applied.

### Claim 27 (depends on 24)

The UE of claim 24, wherein the CSI feedback is transmitted based on CSI reporting type determined based on the priority.

### Claim 28 (depends on 23)

The UE of claim 23, wherein the at least one CSI resource comprises at least one channel state information-reference signal (CSI-RS) resource and at least one channel state information-interference measurement (CSI-IM) resource.

### Claim 29

A base station (BS) for receiving channel state information (CSI) in a wireless communication system, the BS comprising:
a transmitter;
a receiver; and
at least one processor coupled with the transmitter and the receiver,
wherein the at least one processor is configured to:
receive, from a base station (BS), information on at least one CSI resource, wherein the information further comprises information on at least one analog beam;
transmit, to the BS, CSI feedback based on a certain number of CSI resource,
wherein the at least one analog beam is related with the at least one CSI resource, respectively, and,
wherein the certain number of the CSI resource is determined from among the at least one CSI resource based on maximum CSI calculation capability of the UE.