A wireless communication method and apparatus for recovering data
following a serving cell change are disclosed. A wireless
transmit/receive unit (WTRU) includes a status prohibit timer that delays
the transmission of normal status reports that indicate the status of
data, (i.e., PDUs), that was successfully received and/or not
successfully received after a serving cell change status report is sent.
A serving radio network controller (SRNC) transmits a sequence of packet
data units (PDUs). The status prohibit timer is advanced and the WTRU
sends a normal status report to the SRNC without a delay caused by the
status prohibit timer. In another embodiment, the WTRU receives a radio
link control (RLC) intelligence mode indicator signal that indicates
whether a non-intelligent radio network controller (RNC) RLC operation or
an intelligent RNC RLC operation is in effect, and the WTRU generates
normal status reports based on the indication of the signal.