Patent ID: 9730104
Date: 2017-08-08
CPC Classifications: H04L,H04W

Claim:
1. A method for processing data in a transmitting device, the method comprising: providing, by the transmitting device, one or more Packet Data Convergence Protocol (PDCP) Service Data Units (SDUs) to which respective PDCP sequence numbers (SNs) are added to deliver to a receiving device, wherein the respective PDCP SNs are associated with corresponding SDUs of the one or more PDCP SDUs and are used to cipher the corresponding SDUs of the one or more PDCP SDUs; and forwarding, by the transmitting device during a handover procedure, at least one PDCP SDU of which delivery has not been confirmed from among the one or more PDCP SDUs to the receiving device by using a respective PDCP SN of the at least one PDCP SDU.