The utility model discloses a device for triggering the control re-establishment of a radio link (RLC), which comprises an RLC solid mass and an MAC solid mass, wherein the RLC solid mass is used forproducing an RLC PDU, for comparing the state variable which is correlated to the RLC PDU with a pre-determined threshold valve to execute the test of the threshold value and for starting up the re-establishment of RLC according to the test of the threshold value under the situation that the RLC PDU and part of the RLC PDU are required to be re-transmitted; and when at least part of the RLC PDU isconsidered to be re-transmitted, the state variable is gradually increased. The MAC solid mass is used for transmitting the RLC PDU and the PDU subsection. The utility model provides a method and criteria for abandoning RLC PDU and/or corresponding RLC SDU and/or for triggering other procedures.