ARQ and FEC may be combined such that minor errors are corrected without retransmission, and major errors are corrected via a request for retransmission: this is called hybrid automatic repeat request (HARQ).
ARQ与FEC可以组合，使得不需重传就纠正微小错误，并经由重传请求校正大的错误，这被称为混合式自動重送請求（HARQ）。