A method for transmitting downlink control information to a wireless node, the method comprising: allocating by an evolved NodeB, eNB, a first subset of a plurality of subframes, wherein subframes in the first subset include PDCCHs located in control regions of the subframes in the first subset; and allocating, by the eNB, a second subset of the plurality of subframes, wherein subframes in the second subset include data region control channels located in data regions of the subframes in the second subset; wherein the method further comprises: determining, by the eNB, that a region for a PDCCH is in a control region of a particular subframe when the particular subframe is in the first subset, wherein the PDCCH is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the control region of the particular subframe; determining, by the eNB, that a region for a data region control channel is in a data region of the particular subframe when the particular subframe is in the second subset, wherein the data region control channel is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the data region of the particular subframe; modulating, by the eNB, the downlink control information; mapping, by the eNB, the modulated downlink control information onto the control region or the data region of the particular subframe according to the determined region; and transmitting, by the eNB, the particular subframe to the wireless node. allocating by an evolved NodeB, eNB, a first subset of a plurality of subframes, wherein subframes in the first subset include PDCCHs located in control regions of the subframes in the first subset; and allocating, by the eNB, a second subset of the plurality of subframes, wherein subframes in the second subset include data region control channels located in data regions of the subframes in the second subset; wherein the method further comprises: determining, by the eNB, that a region for a PDCCH is in a control region of a particular subframe when the particular subframe is in the first subset, wherein the PDCCH is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the control region of the particular subframe; determining, by the eNB, that a region for a data region control channel is in a data region of the particular subframe when the particular subframe is in the second subset, wherein the data region control channel is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the data region of the particular subframe; modulating, by the eNB, the downlink control information; mapping, by the eNB, the modulated downlink control information onto the control region or the data region of the particular subframe according to the determined region; and transmitting, by the eNB, the particular subframe to the wireless node. determining, by the eNB, that a region for a PDCCH is in a control region of a particular subframe when the particular subframe is in the first subset, wherein the PDCCH is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the control region of the particular subframe; determining, by the eNB, that a region for a data region control channel is in a data region of the particular subframe when the particular subframe is in the second subset, wherein the data region control channel is used to transmit the downlink control information notifying the wireless node of its uplink or downlink grant, and is located in the data region of the particular subframe; modulating, by the eNB, the downlink control information; mapping, by the eNB, the modulated downlink control information onto the control region or the data region of the particular subframe according to the determined region; and transmitting, by the eNB, the particular subframe to the wireless node.