Patent ID: 9629036
Date: 2017-04-18
CPC Classifications: H04L,H04W

Claim:
1. A data communication method in a wireless communication system including a radio link control (RLC) entity and a packet data convergence protocol (PDCP) entity, the method comprising: receiving a message associated with a handover; assembling at least one PDCP packet from at least one RLC packet; delivering the assembled at least one PDCP packet from the RLC entity to the PDCP entity; storing the delivered at least one PDCP packet in a PDCP buffer; generating PDCP status information and transmitting the PDCP status information; re-establishing the RLC entity; receiving, by the PDCP entity from the RLC entity, a new PDCP packet having a sequence number (SN); and delivering, by the PDCP entity to a higher layer, the at least one PDCP packet with an associated SN lower than the SN associated with the received new PDCP packet and the at least one PDCP packet with a consecutively associated SN starting from the SN associated with the received new PDCP packet.