Retransmission control method and receiving side apparatus

Abstract

A retransmission side apparatus including a physical control channel receiver unit to receive a physical control channel which includes a new data indicator updated upon transmission of a new packet and a retransmission sequence number indicating whether transmission is first transmission or retransmission. The physical data channel receiver unit is configured to receive a physical data channel associated with the physical control channel. A transmission acknowledgment information transmitter unit transmits transmission acknowledgment information on a packet received through the physical data channel, on the basis of the new data indicator and the retransmission sequence number received through the physical control channel.

1 .- 6 . (canceled) 
     
     
         7 . A receiving side apparatus comprising:
 a physical control channel receiver unit configured to receive a physical control channel which includes a new data indicator updated upon transmission of a new packet and a retransmission sequence number indicating whether transmission is first transmission or retransmission;   a physical data channel receiver unit configured to receive a physical data channel associated with the physical control channel; and   a transmission acknowledgment information transmitter unit configured to transmit transmission acknowledgment information on a packet received through the physical data channel, on the basis of the new data indicator and the retransmission sequence number received through the physical control channel.   
     
     
         8 . The receiving side apparatus according to  claim 7 , wherein, when the receiving side apparatus has transmitted the transmission acknowledgement information indicating a success of reception of a packet in a last transmission opportunity, when the new data indicator received in a current transmission opportunity is different from that expected to be received next, and when the retransmission sequence number indicates first transmission, the transmission acknowledgement information transmitter unit is configured to transmit the transmission acknowledgement information indicating a request for retransmission of a lost packet. 
     
     
         9 . The receiving side apparatus according to  claim 7 , wherein, when the receiving side apparatus has transmitted the transmission acknowledgement information indicating a success of reception of a packet in a last transmission opportunity, when the new data indicator received in a current transmission opportunity is different from that expected to be received next, and when the retransmission sequence number indicates retransmission, the transmission acknowledgement information transmitter unit is configured to transmit the transmission acknowledgement information indicating a success of reception of the packet. 
     
     
         10 . The receiving side apparatus according to  claim 7 , wherein, when the receiving side apparatus has transmitted the transmission acknowledgement information indicating a failure of reception of a packet in a last transmission opportunity, when the new data indicator received in a current transmission opportunity is identical to that expected to be received next, and when the retransmission sequence number indicates first transmission, the transmission acknowledgement information transmitter unit is configured to transmit the transmission acknowledgement information indicating a reception result of the packet. 
     
     
         11 . The receiving side apparatus according to  claim 7 , wherein, when the receiving side apparatus has transmitted the transmission acknowledgement information indicating a failure of reception of a packet in a last transmission opportunity, and when the new data indicator received in a current transmission opportunity is different from that expected to be received next, the transmission acknowledgement information transmitter unit is configured to transmit the transmission acknowledgement information indicating a request for retransmission of a lost packet. 
     
     
         12 . The receiving side apparatus according to  claim 8 , wherein the last transmission opportunity and the current transmission opportunity are assigned to the same HARQ process. 
     
     
         13 . The receiving side apparatus according to  claim 9 , wherein the last transmission opportunity and the current transmission opportunity are assigned to the same HARQ process. 
     
     
         14 . The receiving side apparatus according to  claim 10 , wherein the last transmission opportunity and the current transmission opportunity are assigned to the same HARQ process. 
     
     
         15 . The receiving side apparatus according to  claim 11 , wherein the last transmission opportunity and the current transmission opportunity are assigned to the same HARQ process.