Patent ID: 8638723

Claim:
A method for use in a wireless transmit receive unit (WTRU) for two-stage reordering of received protocol data units (PDUs), the method comprising: receiving PDUs from a plurality of Node-Bs, wherein each of the received PDUs has a transmission sequence number (TSN); reordering the received PDUs from each of the plurality of Node-Bs using the TSN in a MAC layer in different reordering queues; delivering the received PDUs from a plurality of reordering queues to one logical channel in an RLC layer; reordering the received PDUs in the RLC layer based on a sequence number (SN); starting a timer when at least a RLC PDU is missing based on SN of the RLC PDU; and transmitting a status report indicating a missing RLC PDU based on SN of the RLC PDU on a condition that the timer expires, wherein transmission of the status report is delayed on a condition that a RLC PDU is missing based on SN of the RLC PDU and the timer is running.