ACK/NACK TRANSMISSION METHOD AND BASE STATION IN LONG TERM EVOLUTION-ADVANCED SYSTEM

摘要

Disclosed are an ACK/NACK transmission method and base station for a long term evolution-advanced (LTE-A) system, said method comprising: calculating a resource indication pair for transmitting ACK/NACK on a Physical Hybrid Automatic Repeat-Request Indicator Channel (PHICH) by using the cyclic shift indicator of one pre-defined Demodulation Reference Symbol (DMRS) from among the DMRSs for all flows (310); feeding back ACK/NACK in the resources indicated by the resource indication pair in PHICH (320). ACK/NACK feedback can thus be assured in both single codeword multi-flow and multi-codeword multi-flow situations. Also disclosed are another ACK/NACK transmission method and base station for a LTE-A system. Another ACK/NACK transmission method embodiment for two codewords of a multi-codeword in LTE-A system includes: modulating an ACK/NACK combination, which is fed back by two codewords, by using QPSK; transmitting said QPSK-modulated ACK/NACK combination of two codewords, by using the resources in PHICH corresponding to one pre-defined codeword of said two codewords. ACK/NACK feedback can thus be assured in multi-codeword situations.