Method for transmitting an enhanced control signaling, base station and user equipment

User equipment, configured with a coordinated multipoint transmission mode, the user equipment comprising:

• a second information acquiring unit, configured to acquire a maximum value of control signaling lengths of a macro cell and a pico cell in a set maintained by the user equipment;
• and
• a first determining unit, configured to determine a starting position of a data area of the pico cell according to the maximum value.

A base station, of a main service cell under a coordinated multipoint transmission mode, the base station comprising:

• a first information transmitting unit, configured to transmit first downlink control information to user equipment, wherein the first downlink control information is transmitted in a control area of the main service cell, and includes a base station identifier indicating a base station that transmits second downlink control information.

A base station, applicable to a coordinated multipoint transmission mode, the base station comprising:

• a second information transmitting unit, configured to transmit an enhanced downlink control signaling to user equipment if the enhanced downlink control signaling (E-PDCCH) and a scheduled downlink shared channel (PDSCH) occupy different frequency domain resources, the enhanced downlink control signaling including a base station identifier indicating a base station that transmits data;
• and to transmit the enhanced downlink control signaling to the user equipment if the enhanced downlink control signaling and the scheduled downlink shared channel occupy the same frequency domain resource and different time domain resources, the base station being the same base station that transmits the scheduled downlink shared channel;
• wherein the enhanced downlink control signaling is transmitted in a data area.

User equipment, applicable to a coordinated multipoint transmission mode, the user equipment comprising:

• an information detecting unit, configured to search for an enhanced downlink control signaling of the user equipment according to predetermined information of transmission position of the enhanced downlink control signaling, the enhanced downlink control signaling including a base station identifier indicating a base station that transmits data;
• and
• a second data receiving unit, configured to acquire the base station identifier of the base station that transmits data from the enhanced downlink control signaling, and to receive data from the base station to which the base station identifier corresponds.

A base station, applicable to a coordinated multipoint transmission mode, the base station comprising:

• a signal transmitting unit, configured to transmit a decoded response signal corresponding to an uplink data signal transmitted by user equipment in an enhanced hybrid-ARQ indicator channel (E-PHICH);
• wherein the signal transmitting unit transmits the acquired response signal and data needing to be transmitted to the user equipment simultaneously to the user equipment.