A first base station, comprising: a first determining unit, configured to determine whether first uplink data is received before a first moment; a processing unit, configured to: perform demodulation and decoding of second uplink data if the first determining unit determines that the first uplink data is not received before the first moment, and suspend a hybrid automatic repeat request, HARQ, process if an incorrect demodulation and decoding result is obtained; wherein, a serving cell of user equipment, UE, belongs to the first base station, and a coordinated cell of the UE belongs to the second base station, the UE sends the same uplink data to the first and the second base stations, the first uplink data is the uplink data sent by the UE to the second base station and forwarded by the second base station to the first base station, and the second uplink data is the uplink data directly received from the UE; a second determining unit, configured to determine whether the first uplink data forwarded by the second base station is received between the first moment and a second moment; and a demodulation and decoding unit, configured to: if the second determining unit determines that the first uplink data is received between the first moment and the second moment, wherein the second moment is later than the first moment, perform joint demodulation and decoding of the first uplink data and the second uplink data and determine a demodulation and decoding result, or determine a demodulation and decoding result according to first data forwarded by the second base station, wherein the first data is data obtained after the second base station performs demodulation and decoding of the first uplink data; wherein the processing unit is specifically configured to: send an acknowledgement signal, ACK, to the UE and skip sending transmission indication information of the HARQ process to the UE, wherein the transmission indication information is used to instruct the UE to continue to send a next piece of uplink data. a first determining unit, configured to determine whether first uplink data is received before a first moment; a processing unit, configured to: perform demodulation and decoding of second uplink data if the first determining unit determines that the first uplink data is not received before the first moment, and suspend a hybrid automatic repeat request, HARQ, process if an incorrect demodulation and decoding result is obtained; wherein, a serving cell of user equipment, UE, belongs to the first base station, and a coordinated cell of the UE belongs to the second base station, the UE sends the same uplink data to the first and the second base stations, the first uplink data is the uplink data sent by the UE to the second base station and forwarded by the second base station to the first base station, and the second uplink data is the uplink data directly received from the UE; a second determining unit, configured to determine whether the first uplink data forwarded by the second base station is received between the first moment and a second moment; and a demodulation and decoding unit, configured to: if the second determining unit determines that the first uplink data is received between the first moment and the second moment, wherein the second moment is later than the first moment, perform joint demodulation and decoding of the first uplink data and the second uplink data and determine a demodulation and decoding result, or determine a demodulation and decoding result according to first data forwarded by the second base station, wherein the first data is data obtained after the second base station performs demodulation and decoding of the first uplink data; wherein the processing unit is specifically configured to: send an acknowledgement signal, ACK, to the UE and skip sending transmission indication information of the HARQ process to the UE, wherein the transmission indication information is used to instruct the UE to continue to send a next piece of uplink data.