(57) A method of implementing a state transition from a first state to a second state
for a wireless transmit receive unit, WTRU, the method comprising monitoring whether
a state transition condition for the WTRU has occurred; checking whether the second
state supports high speed downlink shared channel, HS-DSCH, reception, on condition
that the state transition condition has occurred; releasing HS_DSCH resources on the
condition that the second state does not support HS-DSCH reception. In another embodiment,
a method of managing a state transition for a wireless transmit receive unit, WTRU,
the method comprising setting a single HS_DSCH_RECEPTION_GENERAL variable indicating
a status of high speed downlink shared channel, HS-DSCH, reception for any of the
states Cell_FACH, Cell_PCH, URA_PCH and Cell_DCH; and when the HS_DSCH_RECEPTION_GENERAL
is set to FALSE, stopping HS-DSCH reception,clearing radio network temporary identifiers,
RNTIs, resetting a medium access control, MAC, entity, releasing all hybrid automated
response request HARQ resources, and clearing any stored information elements related
to HARQ information.
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