Method and apparatus for performing WTRU state transitions
A method and apparatus for performing state transition of a wireless transmit/receive unit (WTRU) which supports enhanced dedicated channel (E-DCH) in the CELL_FACH state is disclosed. Uplink data is transmitted via an E-DCH while operating in a CELL_FACH state. A radio resource control (RRC) signal, which includes a reconfiguration message, is received while the WTRU is assigned an E-DCH resource. A reconfiguration of the physical channels is performed according to the RRC reconfiguration message. A transition to a CELL_DCH state is performed and uplink data is transmitted in the CELL_DCH state via the E-DCH. In-synch and out-of-synch parameters are reported.
1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
transmitting by the WTRU a first uplink data signal via an enhanced dedicated channel (E-DCH) while the WTRU is operating in a CELL_FACH state;
receiving by the WTRU a radio resource control (RRC) signal, wherein the RRC signal includes a reconfiguration message;
reconfiguring by the WTRU physical channel parameters based on the reconfiguration message; and
transitioning by the WTRU to a CELL_DCH state in response to the RRC signal, wherein the WTRU transitions to the CELL_DCH state without subsequently performing a synchronization procedure.
2. The method of claim 1 further comprising transmitting by the WTRU a second uplink data signal in response to transitioning to the CELL_DCH state.
3. The method of claim 1 further comprising:
transmitting by the WTRU uplink control information in the CELL_DCH state via the E-DCH.
4. The method of claim 1 further comprising reporting by the WTRU in-synch and out-of-synch parameters in response to the reconfiguration of the physical channel parameters.
5. The method of claim 1 further comprising:
setting by the WTRU an uplink transmit power level in the CELL_DCH state, wherein the power level is based on a transmit power used prior to transitioning to the CELL_DCH state.
6. The method of claim 1 further comprising:
receiving by the WTRU an uplink scrambling code assignment; and
transmitting by the WTRU a second uplink data signal using the received uplink scrambling code.
7. The method of claim 1 further comprising:
monitoring by the WTRU a fractional dedicated physical channel (F-DPCH) for a transmit power control (TPC) command.
8. The method of claim 1 wherein the synchronization procedure is synchronization procedure A.
9. A wireless transmit/receive unit (WTRU) comprising:
a transmitter configured to transmit a first uplink data signal via an enhanced dedicated channel (E-DCH) while the WTRU is operating in a CELL_FACH state;
a receiver configured to receive a radio resource control (RRC) signal including a reconfiguration message; and
a processor configured to reconfigure physical channel parameters according to the reconfiguration message, and to transition the WTRU to a CELL_DCH state in response to the RRC signal, wherein the WTRU transitions to the CELL_DCH state without subsequently performing a synchronization procedure.
10. The WTRU of claim 9 further comprising the WTRU configured to report in-synch and out-of-synch parameters in response to the reconfiguration of the physical channel parameters.
11. The WTRU of claim 9 further comprising:
the processor configured to set an uplink transmit power level in the CELL_DCH state, wherein the power level is based on a transmit power used prior to the transition to the CELL_DCH state.
12. The WTRU of claim 9 further comprising:
the receiver configured to receive an uplink scrambling code assignment; and
the transmitter configured to transmit a second uplink data signal using the received uplink scrambling code.
13. The WTRU of claim 9 wherein the synchronization procedure is synchronization procedure A.