Patent ID: 7356099

Claim:
A method for processing PDUs (Protocol Data Units) in a receiver, which can receive a PDU to which a TSN (Transmission Sequence Number) is allocated from a transmitter, and storing the received PDU in the receiver, in an HSDPA (High-Speed Downlink Packet Access) communication system, the method comprising the steps of: setting, in the receiver, a range of a receiver window associated with PDUs to be received; and when a sum of a TSN of a PDU at an upper edge of the receiver window and a value of the set receiver window range is larger than a value of a total TSN of PDUs to be received if a TSN of the received PDU is outside of the set receiver window range, storing the received PDU in a reordering buffer if the TSN of the received PDU is within a predetermined range even though the TSN of the received PDU is smaller than the TSN of the PDU at the upper edge of the receiver window.