# US 2019/0379431 A1 · Method for receiving reference signal in wireless communication system and apparatus therefor

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- Number: US 2019/0379431 A1
- Document ID: US20190379431A1
- Status: Published application
- Kind: A1
- Application number: 16/064,290
- Filed: 2018-01-04
- Published: 2019-12-12
- Earliest claimed: 2017-01-06
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jonghyun PARK; Kijun KIM; Eunsun KIM; Hyunsoo KO; Jiwon KANG
- Web page: https://patentgrep.com/patent/US20190379431A1

## CPC

- H04L 27/2613: {Structure of the reference signals}
- H04B 7/0408: using two or more beams, i.e. beam diversity
- H04B 7/06: at the transmitting station
- 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 72/04: Wireless resource allocation
- H04B 7/0413: MIMO systems
- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Disclosed is a method for receiving a channel state information (CSI)-reference signal (RS) by a user equipment (UE) in a wireless communication system, which includes: receiving a CSI-RS associated with the SSB, in which the CSI-RS may be assumed to be quasi co-located (QCL) with the SSB.

## Claims

### Claim 1

A method for receiving a channel state information (CSI)-reference signal (RS) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a synchronization signal/sequence block (SSB); and
receiving a CSI-RS associated with the SSB,
wherein the CSI-RS is assumed to be quasi co-located (QCL) with the SSB, with respect to a spatial reception parameter.

### Claim 2 (depends on 1)

The method of claim 1, wherein the SSB includes a primary synchronization signal/sequence (PSS), the SSS, and/or a physical broadcast channel (PBCH).

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
receiving QCL information for indicating the QCL assumption between the CSI-RS and the SSB,
wherein the QCL information indicates an index of the SSB and a QCL type for a QCL parameter set to which the QCL assumption is applied.

### Claim 4 (depends on 3)

The method of claim 3, wherein the QCL information is received through radio resource control (RRC) signaling.

### Claim 5 (depends on 3)

The method of claim 3, wherein the QCL type is defined to indicate different QCL parameter sets for each QCL type.

### Claim 6 (depends on 5)

The method of claim 5, wherein the QCL parameter set includes a delay spread, a Doppler spread, a Doppler shift, an average gain and/or an average delay, in addition to the spatial reception parameter.

### Claim 7 (depends on 6)

The method of claim 6, wherein the spatial reception parameter includes a reception beam direction parameter and/or a reception beam width related parameter.

### Claim 8 (depends on 7)

The method of claim 7, wherein the QCL type indicated for the QCL assumption with the SSB is restricted to a specific QCL type in advance.

### Claim 9 (depends on 8)

The method of claim 8, wherein a QCL parameter set indicated by the specific QCL type includes the average delay and/or the Doppler shift, in addition to the spatial reception parameter.

### Claim 10 (depends on 3)

The method of claim 3, wherein when the CSI-RS is mapped to a plurality of CSI-RS resources, application of the QCL assumption is selectively indicated in units of each CSI-RS resource.

### Claim 11 (depends on 10)

The method of claim 10, wherein the indication for the application is received through the RRC signaling.

### Claim 12 (depends on 3)

The method of claim 3, wherein when the QCL assumption corresponds to a partial QCL assumption, and
wherein it is assumed that the QCL parameter of the CSI-RS corresponds to a sub-set of a QCL parameter derived from the SSB.

### Claim 13 (depends on 3)

The method of claim 3, wherein the CSI-RS corresponds to a periodic CSI-RS or aperiodic CSI-RS.

### Claim 14 (depends on 3)

The method of claim 3, wherein the CSI-RS is a CSI-RS transmitted for a purpose of beam management.

### Claim 15

A user equipment (UE) for receiving a channel state information (CSI)-reference signal (RS) in a wireless communication system, the UE comprising:
a radio frequency (RF) unit transmitting and receiving a radio signal; and
a processor controlling the RF unit,
wherein the processor receives a synchronization signal/sequence block (SSB) and a CSI-RS associated with the SSB by controlling the RF unit, and
wherein the CSI-RS is assumed to be quasi co-located (QCL) with the SSB, with respect to a spatial reception parameter.