Method and device for determining search space, and method and device for determining candidate control channel resources

A method for determining candidate control channel resources, the method comprising:

• determining a number of downlink control information bits of each type of control channel currently configurable for a UE;
• determining 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
• determining that actual candidate control channel resources corresponding to a selected type of control channel are all control channel elements (CCEs) of a union of temporary candidate control channel resources corresponding to all or a part of control channels with a same number of the downlink control information bits, or a part of the CCEs of the union of the temporary candidate control channel resources corresponding to all or a part of the control channels with the same number of the downlink control information bits, for control channels that are currently configurable for the UE and are of a same CCE aggregation level, when a number of downlink control information bits of one or more other types of control channels is equal to a number of downlink control information bits of the selected type of control channel,
• wherein the one or more other types of control channels are one or more types of the control channels that are currently configurable for the UE and are of the same CCE aggregation level except the selected type of control channel, and the all or a part of control channels with the same number of the downlink control information bits are all or a part of control channels with a same number of downlink control information bits of a control channel set formed by the one or more other types of control channels and the selected type of control channel.

A user equipment, comprising:

• a control information bit number determination unit, configured to determine a number of downlink control information bits of each type of control channel currently required to be monitored by the UE;
• a temporary search space determination unit, configured to determine a temporary search space corresponding to each type of control channel currently required to be monitored by 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 used by the UE;
• and
• an actual search space determination unit, configured to determine that an actual search space corresponding to a selected type of control channel is all CCEs of a union of temporary search spaces corresponding to all or a part of control channels with a same number of the downlink control information bits, or a part of the CCEs of the union of the temporary search spaces corresponding to all or a part of the control channels with the same number of the downlink control information bits, for control channels of a same CCE aggregation level, when a number of downlink control information bits of one or more other types of control channels is equal to a number of the downlink control information bits of the selected type of control channel, wherein the one or more other types of control channels are one or more types of control channels of control channels that are currently required to be monitored by the UE and are of the same CCE aggregation level except the selected type of control channel;
• and the all or a part of control channels with a same number of downlink control information bits are all or a part of control channels of a control channel set formed by the one or more other types of control channels and the selected type of control channel.

A NodeB, comprising:

• a control information bit number determination unit, configured to determine a number of downlink control information bits of each type of control channel currently configurable for a UE;
• a temporary candidate control channel resource determination unit, configured to determine 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
• an actual candidate control channel resource determination unit, configured to determine that actual candidate control channel resources corresponding to a selected type of control channel are all CCEs of a union of temporary candidate control channel resources corresponding to all or a part of control channels with a same number of the downlink control information bits, or a part of the CCEs of the union of the temporary candidate control channel resources corresponding to all or a part of the control channels with the same number of the downlink control information bits, when for control channels of a same CCE aggregation level, the number of downlink control information bits of one or more other types of control channels is equal to a number of downlink control information bits of the selected type of control channel, wherein the one or more other types of control channels are one or more types of control channels of the control channels that are currently configurable for the UE and are of the same CCE aggregation level except the selected type of control channel, and the all or a part of control channels with the same number of the downlink control information bits are all or a part of control channels with a same number of downlink control information bits of a control channel set formed by the one or more other types of control channels and the selected type of control channel.