Method and apparatus for transmitting control information in wireless communication system
The present invention pertains to a wireless communication system, and more particularly, to a method of receiving a downlink (DL) control channel in a wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving a radio resource control (RRC) message including resource block (RB) allocation information; receiving a subframe having a plurality of physical RBs; and monitoring a plurality of downlink control channel candidates in a physical RB set corresponding to the RB allocation information from the plurality of physical RBs to detect a downlink control channel allocated to a communication device, wherein the plurality of downlink control channel candidates do not continuously exist in a virtual RB set corresponding to the physical RB set.
1. A method for receiving a downlink control channel by a communication device in a wireless communication system, the method comprising:
determining a resource block (RB) pair set for a localized mapping, the RB pair set including a control channel element set; and
monitoring downlink control channel candidates on the control channel element set of the RB pair set in a subframe to detect the downlink control channel,
wherein the downlink control channel candidates include n th and (n+1) th downlink control channel candidates of an aggregation level,
wherein a spacing between starting positions of the n th and (n+1) th downlink control channel candidates of the aggregation level on the control channel element set depends on a number of control channel elements in the RB pair set, and
wherein RB pairs other than the RB pair set in a bandwidth are resources at least for physical downlink shared channel (PDSCH) transmission.
2. The method of claim 1 , wherein the n th and (n+1) th downlink control channel candidates of the aggregation level are discontinuous on the control channel element set.
3. The method of claim 2 , wherein each of the n th and (n+1) th downlink control channel candidates of the aggregation level consists of L consecutive control channel elements, and L represents the aggregation level.
4. The method of claim 1 , wherein the downlink control channel candidates are present after a specific orthogonal frequency division multiplexing (OFDM) symbol in the subframe, and the specific OFDM symbol is not a starting OFDM symbol of the subframe.
5. The method of claim 1 , wherein the downlink control channel candidates include enhanced physical downlink control channel (E-PDCCH) candidates, and the downlink control channel includes an E-PDCCH.
6. A communication apparatus for use in a wireless communication system, comprising:
a radio frequency (RF) unit; and
a processor that:
determines a resource block (RB) pair set for a localized mapping, the RB pair set including a control channel element set, and monitors downlink control channel candidates on the control channel element set of the RB pair set in a subframe to detect the downlink control channel,
wherein the downlink control channel candidates include n th and (n+1) th downlink control channel candidates of an aggregation level,
wherein a spacing between starting positions of the n th and (n+1) th downlink control channel candidates of the aggregation level on the control channel element set depends on a number of control channel elements in the RB pair set, and
wherein RB pairs other than the RB pair set in a bandwidth are resources at least for physical downlink shared channel (PDSCH) transmission.
7. The communication apparatus of claim 6 , wherein the n th and (n+1) th downlink control channel candidates of the aggregation level are discontinuous on the control channel element set.
8. The communication apparatus of claim 7 , wherein each of the n th and (n+1) th downlink control channel candidates of the aggregation level consists of L consecutive control channel elements, and L represents the aggregation level.
9. The communication apparatus of claim 6 , wherein the downlink control channel candidates are present after a specific orthogonal frequency division multiplexing (OFDM) symbol in the subframe, and the specific OFDM symbol is not a starting OFDM symbol of the subframe.
10. The communication apparatus of claim 6 , wherein the downlink control channel candidates include enhanced physical downlink control channel (E-PDCCH) candidates, and the downlink control channel includes an E-PDCCH.