Method and apparatus for controlling transmitting, receiving, and re-transmission

Abstract

The present invention relates to a method and apparatus that are capable of executing the error correction decoding process while controlling the increase in the amount of data that is stored in the receiving apparatus. There is provided a transmitting apparatus for transmitting the data to a receiving apparatus to execute the error correction decoding process using, for example, the received data and the re-transmitted data, comprising a transmitting data generating means for generating a first transmitting data by executing the rate matching process to a first part of the error correction coded data and generating a second transmitting data including at least the data not included in the first part by executing the rate matching process on the basis of the error correction coded data, and a transmitting means for executing the transmission of the second transmitting data as the re-transmission after the transmission of the first transmitting data.

1 . A receiving apparatus for executing the error correction decoding process by using data obtained by combining received data and re-transmitted data, comprising: a storage unit for storing the first received data, and a controlling unit combining the data read from the storage unit with received data transmitted in the re-transmission other than the particular re-transmission and controlling the storage of the combined data to the storage unit, wherein said controlling unit is capable of combining the data read from the storage unit with received data transmitted in the particular re-transmission without storing the combined data within the storage unit. 
   
   
       2 . A receiving apparatus to execute an error correction decoding process based on data obtained by combining received data and re-transmitted data, comprising: a storage unit for storing the first received data; and a control unit to execute the control, for the received data in the re-transmission other than the particular re-transmission, to combine the data read from the storage unit with the received data and to store the combined data to the storage unit, and wherein the received data in the particular re-transmission is combined with the data read from the storage means with the received data, to store the data part corresponding to the data stored by the storage unit among the combined data to the storage unit but not to store the data part not corresponding to the data stored by the storage unit to the storage unit. 
   
   
       3 . The receiving apparatus according to  claim 2 , further comprising: a particular re-transmission detecting unit for determining the particular re-transmission based on any of the contents notified from a base station, the number of times of transmission of the NACK signal, the number of times of reception, and passage of time from the first reception. 
   
   
       4 . The receiving apparatus according to  claim 2 , wherein the receiving apparatus is a mobile station used in the mobile communication system supporting the HSDPA, and whether the transmission is the particular re-transmission or not is determined by a particular re-transmission detecting unit for determining the particular re-transmission with the information notified from a base station via the HS-SCCH. 
   
   
       5 . A receiving apparatus for executing the error correction decoding process by using data by combining the received data stored in a storage unit and the re-transmitted data, comprising: a determining unit for determining whether the re-transmission is the last re-transmission or not; and a control unit to control the storage unit to store the combined data of the data re-transmitted by the last re-transmission when the determining unit determines the re-transmission is not the last re-transmission and to control the storage unit not to store the combined data of the data re-transmitted by the last re-transmission when the determining unit determines the re-transmission is the last re-transmission.