Method for transmitting downlink control channel and device

A method for transmitting a downlink control channel, wherein a subframe comprises an Nth timeslot and an (N+1)th timeslot, the Nth timeslot corresponds to a first transmission time interval TTI, the (N+1)th timeslot corresponds to a second TTI, and the method comprises:

• receiving, by user equipment, control area indication information of the (N+1)th timeslot by using a physical control channel of the Nth timeslot in a control area of the Nth timeslot, wherein the control area indication information comprises frequency domain control indication information and time domain control indication information, the frequency domain control indication information is used to indicate a frequency domain resource block area occupied by a control area of the (N+1)th timeslot in the (N+1)th timeslot, and the time domain control indication information is used to indicate a time domain time unit area occupied by the control area of the (N+1)th timeslot in the (N+1)th timeslot;
• determining, by the user equipment, the control area of the (N+1)th timeslot according to the control area indication information of the (N+1)th timeslot;
• and
• receiving, by the user equipment in the control area of the (N+1)th timeslot, a physical control channel of the (N+1)th timeslot, so as to determine a physical data channel of the (N+1)th timeslot or a physical data channel of an (N+1+k)th timeslot according to the physical control channel of the (N+1)th timeslot, wherein k≧4.

A base station, wherein a subframe comprises an Nth timeslot and an (N+1)th timeslot, the Nth timeslot corresponds to a first transmission time interval TTI, the (N+1)th timeslot corresponds to a second TTI, and the base station comprises:

• a transmitter, configured to send control area indication information of the (N+1)th timeslot to user equipment by using a physical control channel of the Nth timeslot in a control area of the Nth timeslot, wherein the control area indication information comprises frequency domain control indication information and time domain control indication information, the frequency domain control indication information is used to indicate a frequency domain resource block area occupied by a control area of the (N+1)th timeslot in the (N+1)th timeslot, and the time domain control indication information is used to indicate a time domain time unit area occupied by the control area of the (N+1)th timeslot in the (N+1)th timeslot;
• and
• the transmitter, further configured to send, in the control area of the (N+1)th timeslot indicated by the control area indication information of the (N+1)th timeslot sent by the transmitter, a physical control channel of the (N+1)th timeslot to the user equipment, so that the user equipment determines a physical data channel of the (N+1)th timeslot or a physical data channel of an (N+1+k)th timeslot according to the physical control channel of the (N+1)th timeslot, wherein k≧4.