Method and apparatus for transceiving signals in a distributed antenna system

• US 9,621,237 B2
• Filed: 10/23/2015
• Issued: 04/11/2017
• Est. Priority Date: 01/25/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kang, Ji Won, Ihm, Bin Chul, Chun, Jin Young
• Primary Examiner(s): HO, DUC CHI
• Application Number:
  US14/921,443
• Publication Number:
  US 20160112100A1
• Time in Patent Office: 536 Days
• Field of Search: None
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/061 using feedback from receiving side
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a terminal which receives signals from a base station, and to a method in which the terminal receives signals from the base station in a distributed antenna system (DAS). The terminal receives, from the base station having a plurality of antennas, control information on one or more active transmission antennas allocated to the terminal, from among the plurality of antennas, and receives signals from the base station via said one or more active transmission antennas.

Claims

1. A method of transmitting, by a user equipment, feedback information, the method comprising:

receiving, by the user equipment, control information including;

first information on at least one first pilot pattern for channel measurements, and

second information on at least one second pilot pattern for interference measurements; and

transmitting, by the user equipment, the feedback information based on the first and second pilot patterns,

wherein the second information is separate from the first information.

2. The method of claim 1,

wherein the control information further includes information on a number of downlink transmission antennas associated with the first pilot pattern.

3. The method of claim 1, wherein the receiving the control information includes:

receiving, per component carrier of the user equipment by the user equipment, information on one or more first pilot patterns and information on one or more second pilot patterns.

4. A user equipment for transmitting feedback information, the method comprising:

a receiver,

a transmitter, and

a processor configured to control the receiver and the transmitter, the processor configured to;

control the receiver to receive control information including;

first information on at least one first pilot pattern for channel measurements, and

second information on at least one second pilot pattern for interference measurements; and

control the transmitter to transmit the feedback information based on the first and second pilot patterns,

wherein the second information is separate from the first information.

5. The user equipment of claim 4, wherein the control information further includes information on a number of downlink transmission antennas associated with the first pilot pattern.

6. The user equipment of claim 4, wherein the processor is further configured to control the receiver to receive, per component carrier of the user equipment, information on one or more first pilot patterns and information on one or more second pilot patterns.

7. A method of receiving, by a base station, feedback information, the method comprising:

transmitting, by the base station, control information including;

first information on at least one first pilot pattern for channel measurements to a user equipment, and

second information at least one second pilot pattern for interference measurements; and

receiving, by the base station, the feedback information determined based on the first and second pilot patterns from the user equipment,

wherein the second information is separate from the first information.

8. The method of claim 7,

wherein the control information further includes information on a number of downlink transmission antennas associated with the first pilot pattern.

9. The method of claim 7, wherein the transmitting the control information includes:

transmitting, per component carrier of the user equipment, information on one or more first pilot patterns and information on one or more second pilot patterns.

10. A base station for receiving feedback information, the method comprising:

a receiver,

a transmitter, and

a processor configured to control the receiver and the transmitter, the processor configured to;

control the transmitter to transmit control information including;

first information on at least one first pilot pattern for channel measurements to a user equipment, and

second information on at least one second pilot pattern being used for interference measurements; and

control the receiver to receive the feedback information determined based on the first and second pilot patterns from the user equipment,

wherein the second information is separate from the first information.

11. The base station of claim 10, wherein the control information further includes information on a number of downlink transmission antennas associated with the first pilot pattern.

12. The base station of claim 10, wherein the processor is further configured to control the transmitter to transmit, per component carrier of the user equipment, information on one or more first pilot patterns and information on one or more second pilot patterns.