# US 2014/0153508 A1 · Method of coordinated multi-point transmission and reception

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- Number: US 2014/0153508 A1
- Document ID: US20140153508A1
- Status: Published application
- Kind: A1
- Application number: 14/091,206
- Filed: 2013-11-26
- Published: 2014-06-05
- Earliest claimed: 2012-12-04
- Assignees: Postech Academy-Industry Foundation
- Applicants: Postech Academy - Industry Foundation
- Inventors: Dong Hyun Lee; Jong Kim; Won Jin Sung
- Web page: https://patentgrep.com/patent/US20140153508A1

## CPC

- H04L 5/0035: {Resource allocation in a cooperative multipoint environment}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

Disclosed is a coordinated multi-point (CoMP) transmission and reception method. A method of determining a CoMP set in an apparatus for determining a CoMP set of a CoMP system includes transmitting reference signal information from each point, collecting preferred point set information corresponding to the reference signal information, determining the CoMP set based on the collected preferred point set information, and determining transmission target terminals for each component carrier based on the determined CoMP set. The transmission method using the CoMP set may improve performance of a system and enhance frequency efficiency.

## Claims

### Claim 1

A method of determining a coordinated multi-point (CoMP) set in an apparatus for determining a CoMP set of a CoMP system, comprising:
transmitting reference signal information from each point;
collecting preferred point set information corresponding to the reference signal information;
determining the CoMP set based on the collected preferred point set information; and
determining transmission target terminals for each component carrier based on the determined CoMP set.

### Claim 2 (depends on 1)

The method of claim 1, wherein the reference signal information includes information on a point configured to transmit the reference signal information and information on component carriers.

### Claim 3 (depends on 1)

The method of claim 1, wherein the collecting the preferred point set information comprises collecting from the point received the preferred point set information by the apparatus for determining a CoMP set.

### Claim 4 (depends on 1)

The method of claim 1, wherein the determining of the CoMP set comprises:
allocating weights to all CoMP sets having preferred points in the one of collected preferred point set information, as a normalized set so that the weights total to 1;
performing the allocating of the weights for all collected preferred point set information; and
selecting a CoMP set with a maximum weight among available CoMP sets.

### Claim 5 (depends on 1)

The method of claim 1, wherein the determining of the transmission target terminals for each component carrier based on the determined CoMP set comprises:
determining terminals so that a sum of the weights in the determined CoMP set for a primary component carrier configured to support an entire cell is maximized; and
determining terminals so that a sum of the weights in the determined CoMP set for component carriers except the primary component carrier is maximized.

### Claim 6 (depends on 5)

The method of claim 5, further comprising:
transmitting signals using carrier aggregations to terminals which are transmission targets of at least two component carriers among the determined terminals.

### Claim 7 (depends on 1)

The method of claim 1, wherein the determining of the transmission target terminals for each component carrier based on the determined CoMP set comprises:
determining terminals so that a sum of the weights in the determined CoMP set for the primary component carrier configured to support an entire cell is maximized; and
determining terminals except terminals configured to receive transmissions from previous component carriers among terminals of the determined CoMP set for component carriers except the primary component carrier so that a sum of the weights is maximized.

### Claim 8

A CoMP method performed in a terminal in a CoMP system, comprising:
receiving reference signal information from at least one point;
generating preferred point set information based on the received reference signal information; and
transmitting the generated preferred point set information.

### Claim 9 (depends on 8)

The CoMP method of claim 8, wherein the preferred point set information includes preferred point information and preferred component carrier information.

### Claim 10 (depends on 9)

The CoMP method of claim 9, wherein the preferred point information and the preferred component carrier information are determined based on received power for each component carrier of a point corresponding to the received reference signal information and a predetermined standard value.

### Claim 11 (depends on 10)

The CoMP method of claim 10, wherein the predetermined standard value is a value of maximum received power having a margin of a predetermined value.

### Claim 12 (depends on 10)

The CoMP method of claim 10, wherein the predetermined standard value is an average value of received power.