METHOD FOF TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20100279625A1
• Filed: 05/04/2010
• Published: 11/04/2010
• Est. Priority Date: 05/04/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyunsoo, Han, Seunghee, Lee, Moon II, Chung, Jae Hoon
• Granted Patent: US 8,380,135 B2
• Time in Patent Office: Days
• US Class Current: 455/68
• CPC Class Codes: H04B 7/0604 with predefined switching scheme
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0671 using different delays between antennas
• CPC Class Codes: H04B 7/068 using space frequency diversity space-frequency coding H04L1/0606
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas

Abstract

A method of transmitting data in a wireless communication system is provided. A user equipment receives an antenna group selection indicator indicating an antenna group comprising two or more activated transmit antennas among a plurality of transmit antennas, selects a transmit antenna to be activated according to the antenna group selection indicator, and transmits the data by supplying power to a power amplifier corresponding to the selected transmit antenna, wherein the number of power amplifiers is less than the number of transmit antennas and a type of the antenna group is determined according to the number of the power amplifiers. Accordingly, information on an antenna group in use among a plurality of antennas can be effectively transmitted.

Claims

1. A method of transmitting control information in a wireless communication system, the method comprising:

transmitting an antenna group selection indicator indicating an antenna group comprising two or more activated transmit antennas among a plurality of transmit antennas; and

receiving data transmitted through the transmit antennas included in the antenna group, wherein a type of the antenna group is determined according to the number of power amplifiers in use.

2. The method of claim 1, wherein the antenna group selection indicator is transmitted using radio resource control (RRC) signaling.

3. The method of claim 1, wherein the antenna group selection indicator is transmitted using L1/L2 signaling.

4. The method of claim 3, wherein the antenna group selection indicator is transmitted by being masked to a cyclic redundancy check (CRC).

5. The method of claim 1, wherein the antenna group selection indicator is transmitted using a physical downlink control channel (PDCCH).

6. The method of claim 1, wherein the antenna group selection indicator is transmitted using a rank-1 or 2 codebook.

7. A method of transmitting data in a wireless communication system, the method comprising:

receiving an antenna group selection indicator indicating an antenna group comprising two or more activated transmit antennas among a plurality of transmit antennas;

selecting a transmit antenna to be activated according to the antenna group selection indicator; and

transmitting the data by supplying power to a power amplifier corresponding to the selected transmit antenna, wherein the number of power amplifiers is less than the number of transmit antennas and a type of the antenna group is determined according to the number of the power amplifiers.

8. The method of claim 7, wherein the antenna group selection indicator indicates some of predetermined antenna groups among all types of the antenna groups.

9. The method of claim 7, wherein the antenna group selection indicator indicates an antenna group comprising different transmit antennas among the plurality of transmit antennas.