# US 2014/0192672 A1 · Method and apparatus for reporting a measurement in a wireless communication system

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- Number: US 2014/0192672 A1
- Document ID: US20140192672A1
- Status: Published application
- Kind: A1
- Application number: 14/234,920
- Filed: 2012-07-26
- Published: 2014-07-10
- Earliest claimed: 2011-07-28
- Assignees: LG Electronics Inc.
- Inventors: Inkwon Seo; Hanbyul Seo; Kijun Kim; Hakseong Kim
- Web page: https://patentgrep.com/patent/US20140192672A1

## CPC

- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- 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)}
- H04B 17/24: with feedback of measurements to the transmitter
- H04L 5/0057: {Physical resource allocation for CQI}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The present invention relates to a method for reporting a measurement by a terminal, comprising the steps of: measuring the magnitude of a signal from a first transmission point; and measuring the magnitude of a signal from a second transmission point. The measurements of the magnitudes of the signals from each transmission point are performed using a channel state information reference signal.

## Claims

### Claim 1

A method for performing measurement reporting at a User Equipment (UE) in a wireless communication system, the method comprising:
measuring a first signal; and
measuring a second signal,
wherein the first signal and the second signal are Channel State Information-Reference Signals (CSI-RSs) received from a first transmission point and a second transmission point, respectively, and
wherein the first signal and the second signal are distinguished from each other by at least one of CSI-RS subframe configurations, CSI-RS configurations, and CSI-RS antenna ports.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the first transmission point and the second transmission point are included in a plurality of transmission points that perform cooperative transmission for the UE.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the first transmission point and the second transmission point transmit CSI-RSs using different antenna ports.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the first transmission point and the second transmission point transmit CSI-RSs according to different CSI-RS configurations.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the first transmission point and the second transmission point transmit CSI-RSs according to different CSI-RS subframe configurations.

### Claim 6 (depends on 1)

The method according to claim 1, wherein the first transmission point and the second transmission point are located in a neighbor cell of a cell to which the UE belongs.

### Claim 7 (depends on 6)

The method according to claim 6, wherein a transmission point of the cell to which the UE belongs transmits information about an antenna port used for transmitting a CSI-RS by each transmission point to the UE.

### Claim 8 (depends on 6)

The method according to claim 6, wherein a transmission point of the cell to which the UE belongs transmits a CSI-RS configuration used for transmitting a CSI-RS by each transmission point to the UE.

### Claim 9 (depends on 6)

The method according to claim 6, wherein a transmission point of the cell to which the UE belongs transmits a CSI-RS subframe configuration used for transmitting a CSI-RS by each transmission point to the UE.

### Claim 10 (depends on 1)

The method according to claim 1, wherein the magnitude of a signal is measured by calculating a linear average of power of resource elements carrying an RS.

### Claim 11 (depends on 1)

The method according to claim 1, wherein the magnitude of a signal is measured by calculating a linear average of power of resource elements carrying an RS, total reception power, and the number of resource blocks in a corresponding bandwidth, used for measuring the total reception power.

### Claim 12

A User Equipment (UE) for performing measurement reporting in a wireless communication system, the UE comprising:
a reception module; and
a processor,
wherein the processor measures a first signal and a second signal, the first signal and the second signal are Channel State Information-Reference Signals (CSI-RSs) received from a first transmission point and a second transmission point, respectively, and the first signal and the second signal are distinguished from each other by at least one of CSI-RS subframe configurations, CSI-RS configurations, and CSI-RS antenna ports.

### Claim 13 (depends on 1)

The method according to claim 1, wherein the UE recognizes each of the transmission points that transmit the first signal and the second signal respectively using at least one of the CSI-RS subframe configurations, the CSI-RS configurations, and the CSI-RS antenna ports.