Method for acquiring information channel reciprocity and controlling information interactively in frequency division duplex (FDD) heterogeneous network

The present invention discloses a heterogeneous network FDD obtaining channel reciprocity and interactive control information, belonging to the wireless communication field. Macro and Pico cells configured for the cell carriers of different frequencies are reciprocal; a reference frame structure of the TDD; frame structure configuration reciprocal carrier radio frame is an uplink time slot, a guard interval, a downlink time slot, carrier uplink time slot reciprocity carrying an uplink pilot signal SRS and uplink control information; reciprocal downlink slot carrier carries a downlink control information; when Macro carrier cell or Pico cells reciprocal reciprocal carrier radio frame are downlink slots, each downlink corresponding cell polymeric carrier; when uplink slots, each uplink carrier corresponding to the polymerization cell. FDD systems so that channel reciprocity of obtaining a smaller and more accurate resource overhead, but also makes the heterogeneous network uplink control information and downlink control interactive information more accurately.