Patent ID: 8396037
Filing Date: 2013-03-12
Classification: H04W

Abstract:
1. A method for synchronizing Packet Data Convergence Protocol (PDCP) operations in a wireless communication system, the method comprising: when an radio resource control (RRC) connection is re-established, performing an RRC reconfiguration procedure to resume all radio bearers other than a signaling radio bearer when a data radio bearer (DRB) mapped on Radio Link Control (RLC) Acknowledged Mode (AM) is resumed, transmitting PDCP Service Data Units (SDUs) or receiving PDCP SDUs after resetting state variables of a PDCP sequence number of a next PDCP SDU (Next_PDCP_TX_SN), a HFN value for generation of a count value used for PDCP Packet Data Units (TX_HFN), 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.