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    • 10. 发明授权
    • Hybrid ARQ technique for data transmission
    • 用于数据传输的混合ARQ技术
    • US07583614B2
    • 2009-09-01
    • US11222849
    • 2005-09-12
    • Alexander GolitschekEiko Seidel
    • Alexander GolitschekEiko Seidel
    • G01R31/08
    • H04L1/0034H04L1/0003H04L1/0009H04L1/0015H04L1/1819H04L1/1867H04L1/1874H04L1/20
    • The invention provides a hybrid ARQ technique for transmitting a data unit on a radio channel in a communication system to a receiver. After encoding the data unit into a sequence of code words using an encoding parameter, a first code word is transmitted, and an ACK or NAK is received from the receiver. If a NAK is received, the next code word of the sequence is transmitted. According to the invention, a measurement value indicating the current channel conditions is determined by counting the NAK messages and/or evaluating the encoding parameters. Preferably the measurement values are the overall coding rate, the average number of retransmissions per data unit, and the average number of retransmissions per code word. In the preferred embodiment, the transmitter comprises a NAK counter. Besides the improved transmission measurement, the present invention provides using this measurement for adaptation purposes.
    • 本发明提供了一种用于在通信系统中的无线电信道上向接收机发送数据单元的混合ARQ技术。 在使用编码参数将数据单元编码成码字序列之后,发送第一码字,并从接收器接收ACK或NAK。 如果接收到NAK,则发送序列的下一个码字。 根据本发明,通过对NAK消息进行计数和/或评估编码参数来确定指示当前信道条件的测量值。 优选地,测量值是整个编码率,每个数据单元的平均重传次数和每个码字的平均重传次数。 在优选实施例中,发射机包括NAK计数器。 除了改进的传输测量之外,本发明还提供将该测量用于适应目的。