METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE, AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION

• US 20140050191A1
• Filed: 05/03/2012
• Published: 02/20/2014
• Est. Priority Date: 05/03/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hakseong, Seo, Hanbyul, Lee, Daewon
• Granted Patent: US 9,398,578 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a method and a device for transmitting/receiving a control channel in a downlink subframe, which divides into a control area and a data area. The present invention enables the downlink control channel transmitted from the data area of a specific carrier wave to be configured to carry scheduling information on another carrier wave.

Claims

1. A method for receiving, by a user equipment configured with a plurality of cells, a downlink signal from a base station, the method comprising:

receiving a first downlink control channel by using a first cell of the plurality of cells in a data region of a subframe; and

receiving a downlink data channel by using a second cell of the plurality of cells based on the first downlink control channel.

2. The method according to claim 1, further comprising:

receiving a second downlink control channel by using the first cell in a control region of the subframe, and

receiving a second downlink data channel by using the first cell based on the second downlink control channel.

3. The method according to claim 1, wherein the subframe is other than a preconfigured subframe in which a downlink control channel is to be received in only a control region of the preconfigured subframe.

4. The method according to claim 1, wherein the first downlink control channel is received on a set of resources aggregated at a first aggregation level, and the second downlink control channel is received on a set of resources aggregated at an aggregation level greater than the first aggregation level.

5. A user equipment, configured with a plurality of cells, for receiving a downlink signal from a base station, the user equipment comprising:

a radio frequency (RF) unit configured to transmit or receive a radio signal;

a processor configured to control the RF unit,

wherein the processor controls the RF unit to receive a first downlink control channel by using a first cell of the plurality of cells in a data region of a subframe and receive a downlink data channel by using a second cell of the plurality of cells based on the first downlink control channel.

6. The user equipment according to claim 5, wherein the processor control the RF unit to receive a second downlink control channel by using the first cell in a control region of the subframe and receive a second downlink data channel by using the first cell based on the second downlink control channel.

7. The user equipment according to claim 5, wherein the subframe is other than a preconfigured subframe in which a downlink control channel is to be received in only a control region of the preconfigured subframe.

8. The user equipment according to claim 5, wherein the processor controls the RF unit to receive the first downlink control channel on a set of resources aggregated at a first aggregation level, and controls the RF unit to receive the second downlink control channel on a set of resources aggregated at an aggregation level greater than the first aggregation level.

9. A method for transmitting, by a base station, a downlink signal to a user equipment configured with a plurality of cells, the method comprising:

transmitting a first downlink control channel by using a first cell of the plurality of cells in a data region of a subframe; and

transmitting a downlink data channel by using a second cell of the plurality of cells based on the first downlink control channel.

10. A base station for transmitting a downlink signal to a user equipment configured with a plurality of cells, the base station comprising:

a radio frequency (RF) unit configured to transmit or receive a radio signal;

a processor configured to control the RF unit,

wherein the processor controls the RF unit to transmit a first downlink control channel by using a first cell of the plurality of cells in a data region of a subframe and transmit a downlink data channel by using a second cell of the plurality of cells based on the first downlink control channel.