Method and apparatus for managing control channel in a mobile communication system using multiple antennas
Methods and apparatuses are provided for receiving control information by a terminal. A control channel message is received on a control channel. Control information is extracted from the control channel message. The control information includes a transmission rank and precoding matrix information if a common pilot is used for data demodulation. The control information includes the transmission rank and information about a dedicated pilot if the dedicated pilot is used for the data demodulation.
1. A method for receiving control information by a terminal, the method comprising:
receiving a control channel message on a control channel; and
extracting control information
comprising a transmission rank and precoding matrix information from the control channel message if a common pilot is used for data demodulation, and
extracting the control information comprising the transmission rank and information about a dedicated pilot from the control channel message if the dedicated pilot is used for the data demodulation.
2. The method of claim 1 , wherein the control information further comprises information indicating transmit diversity if the common pilot is used for the data demodulation.
3. The method of claim 1 , wherein the control channel message further comprises information about a modulation order and coding rate and information indicating an assigned resource.
4. The method of claim 1 , wherein the control channel message comprises identity information of a terminal.
5. A method for transmitting a control channel message by a base station, the method comprising the steps of:
generating control information comprising a transmission rank and precoding matrix information if a common pilot is used for data demodulation;
generating the control information comprising the transmission rank and information about a dedicated pilot if the dedicated pilot is used for the data demodulation; and
transmitting a control channel message comprising the control information.
6. The method of claim 5 , wherein the control information further comprises information indicating transmit diversity if the common pilot is used for the data demodulation.
7. The method of claim 5 , wherein the control channel message further comprises information about a modulation order and coding rate and information indicating an assigned resource.
8. The method of claim 5 , wherein the control channel message comprises identity information of a terminal.
9. An apparatus for receiving control information, the apparatus comprising:
a transceiver configured to receive a control channel message on a control channel; and
a controller configured to extract control information comprising a transmission rank and precoding matrix information from the control channel message if a common pilot is used for data demodulation, and extract the control information comprising the transmission rank and information about a dedicated pilot from the control channel message if the dedicated pilot is used for the data demodulation.
10. The apparatus of claim 9 , wherein the control information further comprises information indicating transmit diversity if the common pilot is used for the data demodulation.
11. The apparatus of claim 9 , wherein the control channel message further comprises information about a modulation order and coding rate and information indicating an assigned resource.
12. The apparatus of claim 9 , wherein the control channel message comprises identity information of a terminal.
13. An apparatus for transmitting a control channel message by a base station, the base station comprising the steps of:
a controller configured to generate control information comprising a transmission rank and precoding matrix information if a common pilot is used for data demodulation, and generate the control information comprising the transmission rank and information about a dedicated pilot if the dedicated pilot is used for the data demodulation; and
a transceiver configured to transmit the control channel message including the control information.
14. The apparatus of claim 13 , wherein the control information further comprises information indicating transmit diversity if the common pilot is used for the data demodulation.
15. The apparatus of claim 13 , wherein the control channel message further comprises information about a modulation order and coding rate and information indicating an assigned resource.
16. The apparatus of claim 13 , wherein the control channel message comprises identity information of a terminal.