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    • 99. 发明授权
    • Data retransmission apparatus and method in a mobile communication system employing HARQ technique
    • 采用HARQ技术的移动通信系统中的数据重传装置及方法
    • US07236740B2
    • 2007-06-26
    • US09899606
    • 2001-07-05
    • Chang-Hoi KooKyou-Woong KimHwan-Joon Kwon
    • Chang-Hoi KooKyou-Woong KimHwan-Joon Kwon
    • H09B7/185
    • H04L1/1812H04L1/1671H04L1/1845H04L1/1867H04W52/20
    • A method and apparatus for retransmitting data in a mobile communication system wherein a receiver determines whether an initial data block received from a transmitter has an error. Upon detecting an error from the initial data block, the receiver estimates a current channel state and determines a retransmission frequency and a power level of the initial data block according to the estimated current channel state. Thereafter, the receiver transmits a retransmission request message of the initial data block together with the determined retransmission frequency and the determined power level to the transmitter. The transmitter retransmits the initial data block as many times as the retransmission frequency at the requested power level. The receiver then determines whether the retransmitted data blocks have errors, and provides the retransmitted data blocks to an upper layer upon failure to detect errors from the retransmitted data blocks.
    • 一种用于在移动通信系统中重传数据的方法和装置,其中接收机确定从发射机接收的初始数据块是否具有错误。 在从初始数据块检测到错误时,接收机估计当前信道状态,并且根据估计的当前信道状态确定初始数据块的重发频率和功率电平。 此后,接收机将所确定的重发频率和所确定的功率电平与初始数据块的重发请求消息一起发送到发射机。 发射机以所请求的功率电平重发与重传频率一样多的初始数据块。 然后,接收机确定重传的数据块是否具有错误,并且在未能从重传的数据块检测到错误的情况下将重传的数据块提供给上层。