Method and apparatus for transmitting/receiving control channel in wireless communication system
A control channel transmission/reception method and an apparatus for transmitting/receiving control channels using a resource allocation scheme applicable regardless of reference signal transmission or whether the reference signal is transmitted in distributed transmission mode or localized transmission mode are provided. The control channel transmission method includes mapping a Demodulation Reference Signal (DMRS) to Resource Elements (REs) of a Resource Block (RB) for transmitting a control channel, mapping the control channel to the REs numbered with numbers of predetermined number of Resource Element Groups (REGs) in a frequency-first ascending order cyclically, with the exception of the REs to which the DMRS is mapped, and transmitting the DMRS and the control channel.
1. A resource region comprising method of a base station, the method comprising:
comprising a Resource Block (RB) for transmitting a control channel,
wherein an interval between subcarriers corresponding to Resource Elements (REs) constituting a same Control Channel Element (CCE) included in the RB is 4 in each symbol of the RB with the exception of a symbol in which a Demodulation Reference Signal (DMRS) is allocated.
2. The method of claim 1 , wherein the CCE includes extended CCE (eCCE), and the control channel includes enhanced Physical Downlink Control Channel (E-PDCCH).
3. The method of claim 1 , wherein the REs constituting the CCE are included in a first slot and a second slot of a subframe.
4. The method of claim 1 , wherein the subcarriers constituting the RB have a frequency diversity order of 3.
5. The method of claim 1 , wherein the REs to which one of a Cell-specific Reference Signal (CRS) and a Channel State Information Reference Signal (CSI-RS) is to be transmitted are punctured.
6. A base station apparatus for comprising a resource region, the apparatus comprising:
a transceiver configured to transmit and receive a signal to and from a terminal, respectively; and
a controller configured to control comprising a Resource Block (RB) for transmitting a control channel,
wherein an interval between subcarriers corresponding to Resource Elements (REs) constituting a same Control Channel Element (CCE) included in the RB is 4 in each symbol of the RB with the exception of a symbol in which a Demodulation Reference Signal (DMRS) is allocated.
7. The apparatus of claim 6 , wherein the CCE includes extended CCE (eCCE), and the control channel includes enhanced Physical Downlink Control Channel (E-PDCCH).
8. The apparatus of claim 6 , wherein the REs constituting the CCE are included in a first slot and a second slot of a subframe.
9. The apparatus of claim 6 , wherein the controller comprises the RB composed of subcarriers to have a frequency diversity order of 3.
10. The apparatus of claim 6 , wherein the controller comprises the RB by puncturing the REs to which one of a Cell-specific Reference Signal (CRS) and a Channel State Information Reference Signal (CSI-RS) is transmitted.
11. A terminal apparatus for receiving a control signal, the apparatus comprising:
a transceiver configured to transmit and receive a signal to and from a base station, respectively; and
a controller configured to receive a control channel from a base station based on a Resource Block (RB),
wherein an interval between subcarriers corresponding to Resource Elements (REs) constituting a same Control Channel Element (CCE) included in the RB is 4 in each symbol of the RB with the exception of a symbol in which a Demodulation Reference Signal (DMRS) is allocated.
12. The apparatus of claim 11 , wherein the CCE includes extended CCE (eCCE), and the control channel includes enhanced Physical Downlink Control Channel (E-PDCCH).
13. The apparatus of claim 11 , wherein the REs constituting the CCE are included in a first slot and a second slot of a subframe.
14. The apparatus of claim 11 , wherein the controller assumes that the subcarriers constituting the RB have a frequency diversity order of 3.
15. The apparatus of claim 11 , wherein the controller assumes that the REs to which one of a Cell-specific Reference Signal (CRS) and a Channel State Information Reference Signal (CSI-RS) is transmitted are punctured.