A wireless communication system comprising: a wireless terminal device; and a plurality of wireless base station devices which perform coordinated transmission process to the wireless terminal device, wherein the wireless terminal device includes: a control channel reception unit configured to receive a first control channel which indicates new data or retransmission data only from a first wireless base station device, the control channel reception unit identifying, based on a first reference signal or a second reference signal which is different from the first reference signal, a physical downlink channel transmitted from the first wireless base station device or a second wireless base station device, the first reference signal being transmitted from the first wireless base station device, the second reference signal being transmitted from the second wireless base station device; a data reception unit (302, 303) configured to receive data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel received by the control channel reception unit; a control channel transmission unit configured to transmit a second control channel related to a retransmission of the data received by the data reception unit (302, 303); and a reception control unit configured to control Hybrid Automatic Repeat reQuest (HARQ) process for the data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel wherein the second control channel is generated based on a result of the HARQ process and transmitted using a communication link set between the wireless terminal device and the first wireless base station. a wireless terminal device; and a plurality of wireless base station devices which perform coordinated transmission process to the wireless terminal device, wherein the wireless terminal device includes: a control channel reception unit configured to receive a first control channel which indicates new data or retransmission data only from a first wireless base station device, the control channel reception unit identifying, based on a first reference signal or a second reference signal which is different from the first reference signal, a physical downlink channel transmitted from the first wireless base station device or a second wireless base station device, the first reference signal being transmitted from the first wireless base station device, the second reference signal being transmitted from the second wireless base station device; a data reception unit (302, 303) configured to receive data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel received by the control channel reception unit; a control channel transmission unit configured to transmit a second control channel related to a retransmission of the data received by the data reception unit (302, 303); and a reception control unit configured to control Hybrid Automatic Repeat reQuest (HARQ) process for the data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel wherein the second control channel is generated based on a result of the HARQ process and transmitted using a communication link set between the wireless terminal device and the first wireless base station. a control channel reception unit configured to receive a first control channel which indicates new data or retransmission data only from a first wireless base station device, the control channel reception unit identifying, based on a first reference signal or a second reference signal which is different from the first reference signal, a physical downlink channel transmitted from the first wireless base station device or a second wireless base station device, the first reference signal being transmitted from the first wireless base station device, the second reference signal being transmitted from the second wireless base station device; a data reception unit (302, 303) configured to receive data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel received by the control channel reception unit; a control channel transmission unit configured to transmit a second control channel related to a retransmission of the data received by the data reception unit (302, 303); and a reception control unit configured to control Hybrid Automatic Repeat reQuest (HARQ) process for the data coordinately transmitted by at least the first wireless base station device and the second wireless base station device based on the first control channel wherein the second control channel is generated based on a result of the HARQ process and transmitted using a communication link set between the wireless terminal device and the first wireless base station.