A method for determining candidate control channel resources for Long Term Evolution wireless communication systems, comprising: determining, by a NodeB, the number of downlink control information, DCI, bits of each type of control channel currently configurable for a UE; determining, by the NodeB, temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE, according to a mapping relationship between a component carrier for carrying a data channel and a component carrier for carrying a control channel, wherein the mapping relationship is currently configured for the UE; and for control channels that are currently configurable for the UE and are of a same control channel element, CCE, aggregation level, when there exist one or more types of control channels, other than a selected type of control channel in the control channels, that have the same number of DCI bits as the selected type of control channel, determining, by the NodeB, that actual candidate control channel resources corresponding to the selected type of control channel are all CCEs of a union of temporary candidate control channel resources corresponding to all of the types of control channels having the same number of the DCI bits as the selected type of control channel; wherein the determining, by the NodeB, temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE comprises: determining temporary candidate control channel resources corresponding to each component carrier for carrying a data channel; and determining the temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE, according to a control channel corresponding to the component carrier for carrying a data channel and the temporary candidate control channel resources corresponding to the component carrier for carrying a data channel. determining, by a NodeB, the number of downlink control information, DCI, bits of each type of control channel currently configurable for a UE; determining, by the NodeB, temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE, according to a mapping relationship between a component carrier for carrying a data channel and a component carrier for carrying a control channel, wherein the mapping relationship is currently configured for the UE; and for control channels that are currently configurable for the UE and are of a same control channel element, CCE, aggregation level, when there exist one or more types of control channels, other than a selected type of control channel in the control channels, that have the same number of DCI bits as the selected type of control channel, determining, by the NodeB, that actual candidate control channel resources corresponding to the selected type of control channel are all CCEs of a union of temporary candidate control channel resources corresponding to all of the types of control channels having the same number of the DCI bits as the selected type of control channel; wherein the determining, by the NodeB, temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE comprises: determining temporary candidate control channel resources corresponding to each component carrier for carrying a data channel; and determining the temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE, according to a control channel corresponding to the component carrier for carrying a data channel and the temporary candidate control channel resources corresponding to the component carrier for carrying a data channel. determining temporary candidate control channel resources corresponding to each component carrier for carrying a data channel; and determining the temporary candidate control channel resources corresponding to each type of control channel currently configurable for the UE, according to a control channel corresponding to the component carrier for carrying a data channel and the temporary candidate control channel resources corresponding to the component carrier for carrying a data channel.