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

• US 20140050192A1
• Filed: 05/03/2012
• Published: 02/20/2014
• Est. Priority Date: 05/05/2011
• 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 9,544,887 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 5/1469 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. In the present invention, a first downlink control channel is transmitted in the control area of the downlink subframe, and/or a second downlink control channel is transmitted in the data area of the downlink subframe. The first downlink control channel carries downlink control information having a predetermined format, and the second downlink control channel carries downlink control information having a format corresponding to a transmission mode of a user device.

Claims

1. A method for receiving, by a user equipment, a downlink signal from a base station, the method comprising:

detecting at least one of a first downlink control channel and a second downlink control channel; and

receiving a downlink data channel corresponding to the detected downlink control channel,

wherein detecting the least one of the first downlink control channel and the second downlink control channel includes decoding the first downlink control channel according to a predetermined downlink control information format in a control region of a subframe and decoding the second downlink control channel according to a downlink control information format corresponding to a transmission mode of the user equipment in a data region of the subframe.

2. The method of claim 1, further comprising:

receiving information indicating a search space of the second downlink control channel from the base station.

3. The method of claim 2, wherein the predetermined downlink control information format is a downlink control information format 1A for a single antenna port.

4. A user equipment for receiving a downlink signal from a base station, the user equipment comprising:

a radio frequency (RF) unit configured to transmitting or receiving a signal; and

a processor configured to control the RF unit,

wherein the processor detects at least one of a first downlink control channel and a second downlink control channel and controls the RF unit to receive a downlink data channel corresponding to the detected downlink control channel, and

wherein the processor is configured to decode the first downlink control channel according to a predetermined downlink control information format in a control region of a subframe and decode the second downlink control channel according to a downlink control information format corresponding to a transmission mode of the user equipment in a data region of the subframe so as to detect the at least one of the first downlink control channel and the second downlink control channel.

5. The user equipment of claim 4, wherein the processor controls the RF unit to receive information indicating a search space of the second downlink control channel from the base station.

6. The user equipment of claim 5, wherein the predetermined downlink control information format is a downlink control information format 1A for a single antenna port.

7. A method for transmitting, by a base station, a downlink signal to a user equipment, the method comprising:

transmitting at least one of a first downlink control channel and a second downlink control channel; and

transmitting a downlink data channel corresponding to the transmitted downlink control channel,

wherein the first downlink control channel carries downlink control information with a predetermined downlink control information format in a control region of a subframe, and the second downlink control channel carries downlink control information with a downlink control information format corresponding to a transmission mode of the user equipment in a data region of the subframe.

8. A base station for transmitting a downlink signal to a user equipment station, the base station comprising:

a radio frequency (RF) unit configured to transmitting or receiving a signal; and

a processor configured to control the RF unit,

wherein the processor controls the RF unit to transmit at least one of a first downlink control channel and a second downlink control channel and controls the RF unit to transmit a downlink data channel corresponding to the transmitted downlink control channel, and

wherein the first downlink control channel carries downlink control information with a predetermined downlink control information format in a control region of a subframe, and the second downlink control channel carries downlink control information with a downlink control information format corresponding to a transmission mode of the user equipment in a data region of the subframe.