Patent ID: 8964699
Filing Date: 2015-02-24
Classification: H04W

Abstract:
1. A communication device of a wireless communication system for synchronizing Packet Data Convergence Protocol (PDCP) operations with another communication device, the communication device comprising: means for performing a Radio Resource Control (RRC) reconfiguration procedure to resume a data radio bearer (DRB) other than a signaling radio bearer means for transmitting PDCP Service Data Units (SDUs) after resetting state variables of a PDCP sequence number of a next PDCP SDU (Next_PDCP_TX_SN) and a HFN value for generation of a count value used for PDCP Packet Data Units (TX_HFN) to initial values and the DRB is resumed, or receiving PDCP SDUs after resetting the state variables of a next expected PDCP sequence number by a receiving PDCP entity (Next_PDCP_RX_SN) and a HFN value for generation of a count value used for received PDCP Packet Data Units (RX_HFN) to initial values and the DRB is resumed.