Method and apparatus transmitting confirmation information of mobile communication long term evolved system
A transmission method and message technology, which is applied in the LTE field of mobile communication, can solve problems such as the inability to establish a one-to-one correspondence between uplink and downlink, and achieve the effects of alleviating the tension of allocation, multi-spreading gain, and improving reliability
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[0030] The present invention proposes an ACK / NACK feedback scheme aiming at the characteristics of the TDD system, especially when there are more downlink subframes than uplink subframes, to ensure effective transmission of ACK / NACK signaling and lower PAPR of uplink signals. In order to ensure a lower PAPR, it can be understood here: to ensure that the channel for transmitting ACK / NACK is continuous in the frequency domain, and use the same ZC (Zadoff-Chu) sequence; or the same ZC sequence with different shifts Stacking, doing so only increases PAPR linearly, still keeps PAPR in the lower range.
[0031] As introduced above, for the TDD system, due to the asymmetric characteristics of the uplink and downlink, it cannot always establish a one-to-one correspondence like the FDD system. see Figure 4 , when the downlink subframe is less than or equal to the uplink subframe, the mapping relationship between the transmission ACK / NACK and the service subframe can be determined by ...
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