METHOD AND DEVICE FOR REESTABLISHMENT AT PACKET DATA CONVERGENCE PROTOCOL LAYER

摘要

A method and device for reestablishment at the packet data convergence protocol (PDCP) layer are provided in this invention. On the receiving side of the PDCP layer, the method includes: clearing the resident control messages (501); processing the resident service messages, and clearing the feedback information generated during the processing (502); resetting a decompressor, and updating the configuration of a decryption module (503). On the transmitting side of the PDCP layer, the method includes: resetting a compressor, and updating the configuration of an encryption module; clearing the resident control messages; re-processing the resident service messages. With the differentiated processing for the resident messages at the PDCP layer during the reestablishment, the invention can avoid the abnormal mode switching of the compressor, and accelerate the user plane restoration after the reestablishment. The invention can further avoid the transmission of invalid feedback, and improve the utilization of air interface resources; meanwhile, by avoiding the influence of the invalid status report on uplink and downlink transmission policies, the invention can reduce retransmission of the service messages, and improve the utilization of air interface resources.