Hereinabove, the description has been made of the method for transmitting or receiving a DL control channel and DL control information and the search space in LTE and LTE-A.
Hereinafter, a DL control channel in a 5G communication system currently being discussed will be described in more detail with reference to the drawings.
FIG. 3 is a diagram illustrating an example of a basic unit of time and frequency resources constituting a DL control channel which may be used in 5G according to an embodiment of the disclosure.
Referring to FIG. 3, a basic unit (REG) of time and frequency resources constituting a control channel includes one OFDM symbol 301 on a time axis and 12 subcarriers 302, that is, one RB, on a frequency axis. In configuring the basic unit of the control channel, the basic unit on the time axis is assumed to be one OFDM symbol 301, and thus a data channel and a control channel may be time-multiplexed in one subframe. The processing time of a user may be reduced by placing a control channel before a data channel, and thus it is easy to satisfy a latency time requirement. Frequency-multiplexing between a control channel and a data channel can be more efficiently performed by configuring the frequency-axis basic unit of the control channel so as to be the one RB 302.
