Patent ID: 8929298
Filing Date: 2015-01-06
Classification: H04L,H04W

Abstract:
1. A method for processing data in a mobile device, the method comprising: receiving, by the mobile device, one or more PDCP SDUs (Service Data Units) from an upper layer; associating, by the mobile device, each of one or more PDCP (Packet Data Convergence Protocol) SNs (sequence numbers) with a respective one of the received one or more PDCP SDUs, compressing, by the mobile device, a header of the received one or more PDCP SDUs; ciphering, by the mobile device, the header-compressed one or more PDCP SDUs using a respective one of the one or more PDCP SNs; adding, by the mobile device, each of the one or more PDCP SNs to respective one of the ciphered one or more PDCP SDUs; transferring, by the mobile device, the PDCP SN-added ciphered one or more PDCP SDUs to a RLC (Radio Link Control) layer segmenting or concatenating, by the mobile device, the PDCP SN-added ciphered one or more PDCP SDUs transferred to the RLC layer (hereinafter, referred to as “one or more RLC SDUs”) according to a total size set by a lower layer; and adding, by the mobile device, each of one or more RLC sequence numbers (SNs) to a respective one of the segmented or concatenated one or more RLC SDUs; and transferring, by the mobile device, the RLC SN-added segmented or concatenated one or more RLC SDUs to the lower layer, wherein the method further comprises: using, by the mobile device, one PDCP SDU of which delivery has not been confirmed, from among the received one or more PDCP SDUs associated with the one or more PDCP SNs, to transfer to the RLC layer at handover.