# US 2017/0288995 A1 · Method of measuring interference

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- Number: US 2017/0288995 A1
- Document ID: US20170288995A1
- Status: Published application
- Kind: A1
- Application number: 15/605,577
- Filed: 2017-05-25
- Published: 2017-10-05
- Earliest claimed: 2008-03-05
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Jae Hoon CHUNG; Hyun Soo KO; Moon Il LEE; Bin Chul IHM
- Web page: https://patentgrep.com/patent/US20170288995A1

## CPC

- H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336)
- H04B 17/373: Predicting channel quality {or other radio frequency [RF]} parameters
- 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: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements.

## Claims

### Claim 1

A method for measuring interferences of neighboring cells, the method performed by a user equipment (UE) and comprising:
measuring interferences using one or more null signals at a specific subframe identified by a specific subframe index;
measuring channel quality information (CQI) based on the measured interferences; and
feeding back the CQI to a base station,
wherein the one or more null signals are allocated to one or more resource elements in the specific subframe of the one or more subframes of the single frame,
wherein each subframe of the single frame includes only one control region and only one data region,
wherein the one or more resource elements exist only in the data region of the specific subframe,
wherein the one or more resource elements correspond to resource elements to which reference signals of at least one of the neighboring cells are allocated,
wherein the control region is configured within first three Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe,
wherein each subframe of the single frame consists of 14 OFDM symbols, and
wherein an allocation or non-allocation of the null signals is determined according to the specific subframe index identifying the specific subframe of the single frame.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the one or more resource elements are allocated different from one or more resource elements used for reference signals.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the one or more null signals have no data.

### Claim 4 (depends on 1)

The method according to claim 1, wherein a number of the one or more null signals change according to a number of antenna.

### Claim 5

An apparatus for supporting measurement of channel status information related to neighboring cells, the apparatus comprising:
a transceiver; and
a processor operatively connected to the transceiver,
wherein the processor controls the transceiver to:
measure interferences using one or more null signals at a specific subframe identified by a specific subframe index;
measure channel quality information (CQI) based on the measured interferences; and
feedback the CQI to a base station,
wherein the one or more null signals are allocated to one or more resource elements in the specific subframe of the one or more subframes of the single frame,
wherein each subframe of the single frame includes only one control region and only one data region,
wherein the one or more resource elements exist only in the data region of the specific subframe,
wherein the one or more resource elements correspond to resource elements to which reference signals of at least one of the neighboring cells are allocated,
wherein the control region is configured within first three Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe,
wherein each subframe of the single frame consists of 14 OFDM symbols, and
wherein an allocation or non-allocation of the null signals is determined according to the specific subframe index identifying the specific subframe of the single frame.

### Claim 6 (depends on 5)

The apparatus according to claim 5, wherein the one or more resource elements are allocated different from one or more resource elements used for reference signals.

### Claim 7 (depends on 5)

The apparatus according to claim 5, wherein the one or more null signals have no data.

### Claim 8 (depends on 5)

The apparatus according to claim 5, wherein a number of the one or more reference signals changes according to a number of antenna.