Patent ID: 8873513

Claim:
A method used in a wireless communication system including a plurality of cells, the method comprising: receiving transmissions at a mobile device from a source enhanced node B; sending a Packet Data Convergence Protocol (PDCP) status report through a PDCP layer to a target enhanced node B on a radio link from the mobile device to the target enhanced node B; and resetting Radio Link Control (RLC) protocol data unit (PDU) numbering associated with a source enhanced node B link in connection with a handover operation, wherein the PDCP status report comprises PDCP sequence numbers added to RLC layer service data units (SDUs) by the PDCP layer, the PDCP sequence numbers being common to both the source enhanced node B and the target enhanced node B and distinct from RLC PDU numbering associated with the source enhanced node B link, which RLC PDU numbering associated with the source enhanced node B link is not relevant to communication with the target enhanced node B.