Method and device for controlling downlink subframe and transmitting data of trunk link

The invention discloses a method for controlling downlink subframe and transmitting data of a trunk link. The method comprises the following steps that: a base station transmits a relay physical control format indicating channel (R-PCFICH) to a trunk node, wherein the R-PCFICH indicates the number N of orthogonal frequency division multiplexing (OFDM) symbols and the number M of resource blocks occupied by a relay physical downlink control channel (R-PDCCH); the base station transmits control information to the trunk node on the relay physical downlink control channel (R-PDCCH); and the base station transmits data to the trunk node on a relay physical downlink shared channel (R-PDSCH). The invention also discloses base station equipment and the trunk node for implementing the method. The method and the device provide a particular scheme for data on the trunk link and signaling multiplexing control, and the scheme meets the design requirement of an LTE-A system, and can be compatible with the conventional 3GPP Rel-8 system.