# US 10,374,839 B2 · Operation method of user equipment in relation to CSI-RS in wireless communication system and apparatus supporting the same

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- Number: US 10,374,839 B2
- Document ID: US10374839B2
- Status: Granted
- Kind: B2
- Application number: 15/744,673
- Filed: 2016-08-10
- Published: 2018-07-26
- Granted: 2019-08-06
- Earliest claimed: 2015-08-13
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jonghyun Park; Kijun Kim
- Web page: https://patentgrep.com/patent/US10374839B2

## CPC

- H04L 25/03006: {Arrangements for removing intersymbol interference}
- H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]}
- H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)}
- H04L 5/0057: {Physical resource allocation for CQI}
- H04B 7/0617: {for beam forming}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 25/0226: {sounding signals per se}
- H04L 27/2601: {Multicarrier modulation systems}
- H04L 2025/03783: {Details of reference signals}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

The present invention provides an operation method of an user equipment in relation to CSI-RS in a wireless communication system. Particularly, an operation method performed by a user equipment (UE) according to the present disclosure includes receiving a higher layer signaling including resource configuration information related to an aperiodic transmission of beamformed CSI-RS from a base station (BS); receiving a first DCI format including first control information indicating that there is an aperiodic transmission of the beamformed CSI-RS from the BS; measuring the beamformed CSI-RS based on the received resource configuration information; and reporting a measurement result of the beamformed CSI-RS to the BS.

## Claims

### Claim 1

A method for receiving, by a user equipment (UE), a data on a physical downlink shared channel (PDSCH) in a wireless communication system, the method comprising:
receiving, from a base station (BS), a higher layer signaling including resource configuration information related to an aperiodic transmission of a channel state information-reference signal (CSI-RS);
receiving, from the BS, a downlink control information (DCI) format including information related to a PDSCH resource mapping;
determining, by the UE, a resource mapping for the PDSCH based on the DCI format; and
receiving, from the BS, the data on the PDSCH.

### Claim 2 (depends on 1)

The method of claim 1, wherein the information related to the PDSCH resource mapping is a dynamic zero power (ZP) CSI-RS indication field.

### Claim 3 (depends on 2)

The method of claim 2, wherein the dynamic ZP CSI-RS indication field includes a resource region that is available to be used for PDSCH transmission in a situation when the aperiodic transmission of the CSI-RS does not occur.

### Claim 4 (depends on 1)

The method of claim 1, wherein the DCI format further includes a PDSCH resource element mapping and quasi-co-location indicator (PQI) field.

### Claim 5 (depends on 4)

The method of claim 4, wherein the PDSCH resource mapping is performed based on the PQI field or the information related to the PDSCH resource mapping.

### Claim 6 (depends on 1)

The method of claim 1, wherein the DCI format is a DCI format related to a transmission mode (TM) which is defined for supporting a transmission of the CSI-RS.

### Claim 7 (depends on 1)

The method of claim 1, wherein the information related to the PDSCH resource mapping is represented as 2 bits.

### Claim 8 (depends on 1)

The method of claim 1, wherein the information related to the PDSCH resource mapping represents a parameter set configured by the higher layer signaling in order to determine the PDSCH resource mapping.

### Claim 9

A user equipment (UE) for receiving a data on a physical downlink shared channel (PDSCH) in a wireless communication system, the UE comprising:
a a receiver; and
a processor, functionally connected to the receiver, wherein the processor is configured to:
control the receiver to receive, from a base station (BS), a higher layer signaling including resource configuration information related to an aperiodic transmission of a channel state information-reference signal (CSI-RS);
control the receiver to receive, from the BS, a downlink control information (DCI) format including information related to a PDSCH resource mapping;
determine, by the UE, a resource mapping for the PDSCH based on the DCI format; and
control the receiver to receive, from the BS, the data on the PDSCH.

### Claim 10 (depends on 9)

The UE of claim 9, wherein the information related to the PDSCH resource mapping is a dynamic zero power (ZP) CSI-RS indication field.