Patent ID: 8660085

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 prior to completion of a handover operation from the source enhanced node B to the target enhanced node B; and resetting Radio Link Control (RLC) PDU numbering associated with the source enhanced node B link in connection with the handover operation, wherein the PDCP status report comprises PDCP sequence numbers added to RLC layer 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 a 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.