Method and apparatus for transmitting and receiving control information and packet data in downlink

An apparatus for transmitting control information and packet data, the apparatus comprising:

• a control channel generation unit for generating control channels which transmit the control information;
• a control indication channel generation unit for generating control indication channels which indicate whether the control channels are transmitted or not;
• a data channel generation unit for generating data channels;
• a multiplexing unit for receiving channel signals of the control channels, the control indication channels, and the data channels and multiplexing the channel signals;
• a channel transmission unit for receiving the multiplexed channel signals and outputting the multiplexed channel signals as an output signal;
• and
• a transmission control unit for receiving a control signal from an external device and controlling the control channel generation unit, the control indication channel generation unit, the data channel generation unit, the multiplexing unit, and the channel transmission unit.

A method of receiving control information and packet data, the method comprising:

• (a) separating corresponding channel information from resources designated for one or more channels by demultiplexing the channel information;
• (b) receiving control indication channels in accordance with the result of demultiplexing;
• (c) receiving control channels by using information of the received control indication channels;
• and
• (d) receiving data channels by using information of the received control indication channels and control channels.