METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK DATA

• US 20150333880A1
• Filed: 02/28/2013
• Published: 11/19/2015
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YI, Yunjung, AHN, Joonkui, SEO, Dongyoun
• Granted Patent: US 9,407,403 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for transmitting downlink data in a wireless communication system is provided. A base station generates a downlink sub-frame comprising: a first control channel for a first cell having a first frequency band; and a second control channel for a second cell having a second frequency band including a part of the first frequency band. The base station transmits the downlink data through the downlink sub-frame.

Claims

1. A method for transmitting downlink data in a wireless communication system, comprising:

generating a downlink subframe comprising a first control channel for a first cell having a first frequency band and a second control channel for a second cell having a second frequency band, wherein the second frequency band includes a part of the first frequency band; and

transmitting downlink data through the downlink subframe.

2. The method of claim 1, wherein a bandwidth of the first frequency band is 20 MHz, and a bandwidth of the second frequency band is 1.4 MHz.

3. The method of claim 1, wherein the first cell and the second cell have same cell identifiers.

4. The method of claim 3, wherein the first control channel and the second control channel are decoded using same cell-specific reference signal.

5. The method of claim 1, wherein the first control channel is assigned to at least one first OFDM symbol of a plurality of OFDM symbols of the downlink subframe.

6. The method of claim 5, wherein the second control channel is assigned to at least one of the plurality of OFDM symbols in the second frequency band of the downlink subframe.

7. The method of claim 5, wherein the second control channel is assigned to at least one of a remainder of a plurality of OFDM symbols in the second frequency band of the downlink subframe except the at least one first OFDM symbol for the first control channel.

11. The base station of claim 1, wherein the first control channel is assigned to at least one first OFDM symbol of a plurality of OFDM symbols of the downlink subframe.

12. The base station of claim 11, wherein the second control channel is assigned to at least one of the plurality of OFDM symbols in the second frequency band of the downlink subframe.

13. The base station of claim 11, wherein the second control channel is assigned to at least one of a remainder of a plurality of OFDM symbols in the second frequency band of the downlink subframe except the at least one first OFDM symbol for the first control channel.

8. A base station in a wireless communication system comprising:

a radio frequency unit configured to transmit radio signals; and

a processor connected to the RF unit and configured to;

generate a downlink subframe comprising a first control channel for a first cell having a first frequency band and a second control channel for a second cell having a second frequency band, wherein the second frequency band includes a part of the first frequency band; and

transmit downlink data through the downlink subframe.

9. The base station of claim 8, wherein a bandwidth of the first frequency band is 20 MHz, and a bandwidth of the second frequency band is 1.4 MHz.

10. The base station of claim 8, wherein the first cell and the second cell have same cell identifiers.