resource allocation information can be correctly received by the terminal the terminal finds corresponding downlink resource according to the downlink resource allocation information receives a pdsch with the corresponding downlink resource and feeds back an ack message or a nack message on a pucch according to the specific status of receiving the pdsch i e feeds back the ack message to the enodeb if the pdsch can be normally received and feeds back the nack message to the enodeb if the pdsch cannot be normally received step 304 if the downlink resource allocation information cannot be correctly received by the terminal the terminal transmits a dtx signal on the pucch or the pusch rather than receiving the pdsch and then step 305 is performed step 305 after receiving the dtx signal the enodeb determines that transmission of the pdcch is erroneous and then step 306 is performed step 306 the enodeb increases a number of error data blocks of the pdcch by 1 and updates a bler of the pdcch according to the number of error data blocks of the pdcch from the above content it can be seen that the embodiment of the present disclosure detects and tracks the reception performance of the pdcch by measuring the bler of the pdcch.