Wireless transmit receive unit and method implemented therein

Wireless transmitting and receiving unit and its implementation method

WIRELESS TRANSMIT RECEIVE UNIT AND METHOD IMPLEMENTED THEREIN

This application is related to wireless communication.

As part of the ongoing evolution of the Wideband Code Division Multiple Access (WCDMA) standard in Release 8 of the 3rd Generation Partnership Project (3GPP) standard, a new work project was created to enhance the CELL_FACH state Type dedicated channel (E-DCH) is combined for wireless transmit and receive unit (WTRU).

Figure 1 shows the radio resource control (RRC) service status of a 3GPP WTRU with an enhanced uplink (UL). The WTRU can operate in multiple states based on user activities. The following states have been defined: idle (IDLE), cell dedicated channel (CELL_DCH), cell forward access channel (CELL_FACH), universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) registered area paging Channel (URA_PCH), and cell paging channel (CELL_PCH). The RRC state transition is controlled by the network using radio network controller (RNC) parameters. Generally, the WTRU does not decide to perform the state change by itself.

In the CELL_DCH state, dedicated physical channels are allocated to the WTRU in the UL and downlink (DL). The WTRU is informed at the cell level based on its current activity settings. The WTRU may use dedicated transmission channels, shared transmission channels, or a combination of these transmission channels.

If the WTRU has been assigned to use a common channel (for example, forward access channel (FACH), random access channel (RACH)), it is in CELL_FACH status. In the CELL_FACH state, no dedicated physical channel is allocated to the WTRU, and the WTRU continuously monitors the forward access channel (FACH) (for example, to the second common control physical channel (S-CCPCH)) or high-speed downlink in the DL Link shared channel (HS-DSCH). The WTRU is allocated in the UL a preset public or shared transmission channel (such as a random access channel (RACH)) that it can use at any time according to the access procedure of the transmission channel. UTRAN can learn the location of the WTRU at the cell level according to the cell where the WTRU last performed a cell update.

In the CELL_PCH state, no dedicated physical channel is allocated to the WTRU. The WTRU selects the PCH and uses discontinuous reception to monitor the selected PCH via the associated paging indicator channel (PICH). No UL events may occur. UTRAN can learn the location of the WTRU at the cell level according to the cell where the WTRU last performed a cell update in the CELL_FAC state.

In the URA_PCH state, no dedicated channel is allocated to the WTRU. The WTRU selects the PCH and uses discontinuous reception via the associated PICH to monitor the selected PCH. No UL events may occur. Know the location of the WTRU at the UTRAN registration area level based on the URA allocated to the WTRU during the last URA update in the CELL_FACH state.

The RACH transmission mechanism is based on the slot-Aloha method with capture indication. Before transmitting the message, the WTRU acquires the channel by transmitting a short preamble, which is randomly selected from the randomly selected access time slot The signature sequence is composed. The WTRU then listens on the acquisition indicator channel (AICH) and waits for an acquisition indicator from Node-B. The indication includes a specific AICH signature sequence that is one-to-one mapped with the preamble signature sequence selected by the WTRU. If a positive acquisition indication is received, the WTRU has effectively acquired the channel and can transmit the WTRU's message. In the RACH system, the resources that the WTRU can use or are predetermined by the selection of the preamble signature sequence.

E-DCH can be used for CELL_FACH WTRU to increase the data rate in the new enhanced RACH (E-RACH). The WTRU can transmit over the E-DCH for a longer duration (ie, 10 milliseconds or 20 milliseconds duration) than RACH transmission using version 99.

Transmission via E-DCH requires the establishment of a dedicated radio control channel. In the system before version 8, when moving from the CELL_FACH state to the CELL_DCH state, a synchronization process is performed to set the transmission power of the Node-B and the WTRU to an appropriate level. The synchronization procedure A defined in the 3GPP standard is designed to accommodate the long connection time. The procedure consists of two stages. During the first phase, only in-sync primitives can be reported from the WTRU's physical layer to layer 3 (L3). If the quality of the DL radio link (RL) (ie partial dedicated physical channel (F-DPCH) or dedicated physical control channel (DPCCH)) is higher than a predetermined threshold in the previous 40 milliseconds, the synchronization primitive is reported. Primitives are reported every 10 milliseconds. When the continuous synchronization of N312 is reported during the period of T312, consider establishing a physical channel, where N312 and T312 are configured by UTRAN. When the physical channel is established, the WTRU may start UL transmission. Order Segment 2 starts 160 milliseconds after the physical channel is established, in which both out-of-sync primitives can be reported to L3 of the WTRU.

In the case of E-DCH transmission in the CELL_FACH state, another synchronization procedure (for example, synchronization procedure AA) is provided, and the synchronization procedure is used to verify the period. The post-verification period is a time period of 40 milliseconds, in which the DL signal quality is confirmed. During the post-verification procedure, the WTRU immediately transmits data on the UL. During the transmission, the WTRU monitors the quality of the transmission power control (TPC) field of the F-DPCH. If after the first 40ms, the quality of the TPC field of the F-DPCH is better than the critical value Qin, the post-verification is successful, otherwise it has failed.

When the post-authentication cycle for a WTRU that is in or about to enter the CELL_DCH state fails, the behavior of the synchronization procedure of the WTRU is defined in the 3GPP standard. However, when it is operating in the CELL_FACH state, the behavior of the WTRU regarding the proposed synchronization procedure for the WTRU is not defined.

The current regulations on RL establishment and power control are defined as dedicated RL resources reserved for a specific WTRU for a long period of time. However, they are not very suitable for situations where the WTRU occupies the frequency channel for a short period of time and then releases radio resources (for example, burst transmission).

In the current 3GPP standard, RL failure is only triggered when the WTRU is in the CELL_DCH state. After the RL fails, the WTRU's behavior includes transitioning to the CELL_FACH state, performing cell reselection, and initiating cell update procedures. However, it is expected to be used to trigger the RL failure procedure of the WTRU in the CELL_FACH state.

A method and device for detecting RL failure and post-verification procedures. Once the transmission on the E-DCH starts, the quality of the downlink F-DPCH is monitored. Determine whether the quality of the downlink F-DPCH is lower than a preset critical value. If the quality is lower than the preset critical value, it indicates that RL failure has occurred, and the transmission on the E-DCH in the CELL_FACH state is terminated. In the case of post-authentication failure, the E-DCH resource is released.

The "wireless transmit/receive unit (WTRU)" mentioned below includes but is not limited to user equipment (UE), mobile station, fixed or mobile subscriber unit, pager, cellular phone, personal digital assistant (PDA), computer or capable Any other type of user equipment operating in a wireless environment. The "base station" mentioned below includes but is not limited to Node-B, site controller, access point (AP) or any other type of interface device capable of operating in a wireless environment.

The term E-DCH mentioned below is used to indicate transmission on E-DCH, which is then based on contention for access to CELL_FACH state, CELL_PCH state, URA_PCH state or idle mode. The term E-DCH in the CELL_FACH state may indicate the E-DCH in the CELL_PCH state, URA_PCH state and/or IDLE mode. The method disclosed here is also applicable to any other improvements to the existing competition based on the access to the channel occupied by the WTRU for a longer period of time (ie, RACH).

Figure 2 shows a wireless communication system 200, which includes multiple WTRUs 210, Node-B 220, CRNC 230, SRNC 240, and a core network 250. As shown in Figure 3, the WTRU 210 communicates with the node-B 220, and the node -B 220 communicates with CRNC 230 and SRNC 240. Figure 2 shows three WTRUs 210, one Node-B 220, one CRNC 230, and one SRNC 240. It should be noted that any combination of wireless and wired devices can be included in the wireless communication system 200.

FIG. 3 is a block diagram 300 of functional modules of the WTRU 210 and the Node-B 220 in the wireless communication system 200 in FIG. 2. As shown in Figure 3, the WTRU 210 communicates with Node-B, and both parties are configured to perform a method for detecting the occurrence of RL failure when the WTRU transmits on the E-DCH in the CELL_FACH state.

In addition to the elements that may be included in a typical WTRU, the WTRU 210 also includes a processor 215, a receiver 216, a transmitter 217, and an antenna 218. The processor 215 is configured to perform a method for detecting the occurrence of an RL failure when the WTRU transmits on the E-DCH in the CELL_FACH state. The receiver 216 and the transmitter 217 communicate with the processor 215. The antenna 218 communicates with both the receiver 216 and the transmitter 217 to facilitate the transmission and reception of wireless data.

In addition to the components that can be included in a typical base station, the Node-B 220 also includes a processor 225, a receiver 226, a transmitter 227, and an antenna 228. The processor 225 is configured to perform a method for detecting the occurrence of RL failure when the WTRU transmits on the E-DCH in the CELL_FACH state. The receiver 226 and the transmitter 227 communicate with the processor 225. The antenna 228 communicates with the receiver 226 and the transmitter 227 to facilitate the transmission and reception of wireless data.

Figure 4 shows a radio interface protocol model 400. The WTRU 210 may include RRC layer (L3) entities, RLC entities, media access control (MAC) entity and entity (PHY) layer (L1) entity. The RLC entity includes transmitting-side components and receiving-side components. The transmitting side components include a transmission register. The RLC entity increases the reliability of radio transmission. The MAC entity controls the user's access to the transmission medium. The PHY layer transmits and receives data in the air. The Node-B 220 may include the same entities also shown in Figure 4.

Figure 5 shows a flow chart of the behavior of the WTRU 210 when the post-authentication process fails. The post verification process fails 505. The WTRU 210 may be configured to trigger the release 510 of E-DCH resources. Optionally, the WTRU 210 may be configured to wait 515 for a predetermined timer to expire. The WTRU 210 may be configured to perform a fallback procedure before attempting another E-DCH UL random access. The WTRU 210 may be configured to start a back-off timer 520. If the timer has not expired 525, the WTRU 210 may be configured to check whether the cell reselection criterion 535 is met. If the cell reselection criteria are met, the WTRU 210 may be configured to perform a cell update process and send a cell update (CELL UPDATE) message to the node-B 540. If the cell reselection criteria are not met, the WTRU 210 continues to check the back-off timer status and cell update criteria. When the backoff timer has expired 525, the WTRU 210 may be configured to try a new UL random access 530. The fallback timer can be configured by higher layers.

Alternatively, the WTRU 210 may perform a cell update process indicating cell reselection, RL failure, or a new behavior indicating failure during E-DCH in the CELL_FACH state. Optionally, the WTRU 210 may be configured to indicate transmission failure to higher layers.

Release E-DCH resources in CELL_FACH state or idle state, or Terminating E-DCH access can include the following steps. The PHY layer can report to the MAC that the PHY layer process has failed and ended, where the MAC layer stops transmitting data to the physical layer. E-DCH reception (E-DCH access authorization channel (E-AGCH), E-DCH hybrid automatic repeat request (HARQ) indicator channel (E-HICH), E-DCH relative authorization channel (E-RGCH)) And the transmission (E-DPCCH, E-DCH dedicated physical data channel (E-DPDCH)) process is stopped. The MAC-i/is entity is reset. Resetting the MAC-i/is entity includes flushing the HARQ process, setting the transmission sequence number (TSN) to the initial value, and discarding any remaining segments in the segment register. Alternatively, the WTRU 210 may only refresh the HARQ process or refresh the HARQ process and reset the TSN value, instead of performing resetting on all MAC-i/is. Optionally, the WTRU 210 may clear the E-DCH Radio Network Temporary Identity (E-RNTI), HS-DSCH RNTI (H-RNTI), or Cellular RNTI (C-RNTI).

Figure 6 shows a flow chart of a situation where the WTRU 210 fails to trigger an RL in the CELL_FACH state. The WTRU 210 initiates transmission through the E-DCH 605. The quality of the associated DL F-DPCH is monitored 610. The channel quality after a certain offset from the time when the WTRU 210 starts transmission can be monitored. If the quality of F-DPCH for N frames is lower than a predefined threshold (i.e.<i>Q</i>_{<i>F-DPCH</i>}) 615, it is determined that the RL failure has occurred 625, where N is the predefined number of consecutive frames. If the quality of the F-DPCH is not lower than the predefined critical value, there is no RL failure 620 and the quality of the DL F-DPCH channel continues to be monitored 610. If the quality of the F-DPCH for N frames is not satisfied, L1 reports to L3 that the RL fails 625. Once wireless The electrical link fails, and the WTRU 210 may be configured to terminate any E-DCH transmission 630 in the CELL_FACH state.

Figure 7 shows a diagram of the behavior of the WTRU 210 when RL failure is detected. RL failure occurs 705. The WTRU 210 may terminate E-DCH transmission 710 in the CELL_FACH state. Terminating E-DCH transmission includes releasing E-DCH resources 715. The E-DCH transmission and reception process stops 720. The MAC-i/is entity is reset 725. The WTRU 210 may be configured to wait for a predefined time 730. The WTRU 210 may be configured to start a back-off timer 735. The WTRU 210 may be configured to determine 740 whether the timer has expired. If the timer has not expired, the WTRU 210 is configured to check whether the cell reselection criterion 750 is met. If the cell reselection criteria are met, the WTRU 210 may be configured to perform the cell reselection process and send a cell update message to the node-B 755. If the cell reselection is not satisfied, the WTRU 210 is configured to continue to check the back-off timer status. If the timer has expired, the WTRU 210 is configured to try a new UL random access 745.

Alternatively, when the RL failure has occurred, the WTRU 210 may refresh the HARQ process; refresh the HARQ process and reset the TSN; perform the cell update process, which has a behavior indicating cell reselection, RL failure, or any indication Failure behavior during E-DCH in CELL_FACH state.

Alternatively, the WTRU 210 may retry the transmission via the E-DCH up to the predefined K times, and then trigger the cell reselection process.

Or, if the WTRU 210 has previously tried to use a shortened transmission time interval (TTI) value (for example, 2 milliseconds) for transmission, the WTRU 210 can use a larger TTI value (for example, 10 milliseconds) to retry transmission on the E-DCH.

Alternatively, if the WTRU 210 has previously tried to use a larger TTI value (for example, 10 milliseconds) to transmit on the E-DCH, the WTRU 210 may try to transmit on the RACH.

Alternatively, the quality of the associated DL DPCCH can be monitored. If the quality of the DPCCH is lower than the predefined threshold for N frames, it is determined that RL failure has occurred, where N is the predefined number of consecutive frames.

L1 can also be configured as if the quality of N F-DPCH or DPCCH in M consecutive frames is lower than a predefined threshold<i>Q</i>_{<i>F-DPCH</i>}, Then report RL failure to L3.

Alternatively, the WTRU 210 may be configured to monitor the quality of the common pilot channel (CPICH). If the quality of the CPICH or any other DL control channel for N frames is lower than a predefined threshold, the L1 of the WTRU 210 will report to the WTRU 210 L3 reports RL failure.

Alternatively, the WTRU 210 may be configured to monitor the reception of an acknowledgement (ACK) or a negative acknowledgement (NACK) from the Node-B 220 for its UL transmission. If the WTRU 210 receives K NACKs within the predefined window L of continuous UL transmissions, the L1 of the WTRU 210 reports to the L3 of the WTRU 210 indicating that the RL failure has occurred, where K and L are pre-configured or signaled to the WTRU 210.

Alternatively, the WTRU 210 may be configured to monitor the success of the hybrid automatic repeat request (HARQ) procedure. If R HARQ processes fail within the window of J new HARQ processes, the WTRU 210 may be configured to announce RL fails, where R and J may be predefined or sent to the WTRU 210 parameters.

The WTRU 210 may be configured to receive S consecutive TPC increment commands on the F-DPCH or DPCCH, where S is pre-configured or signaled to the WTRU 210. If the WTRU 210 cannot further increase its transmission power because it has reached the maximum power, the WTRU 210 may declare RL failure.

Alternatively, when the WTRU 210 transmits S consecutive TPC increase commands on the UL DPCCH to request the Node-B 220 to increase the DL transmission power of the WTRU, and the received power increase is not observed in the DL control channel, the RL can be declared fail.

In limited UL transmission, the WTRU 210 may be configured to use the E-DCH to ping the Node-B 220, and the WTRU 210 verifies the Node-B on the AICH or F-DPCH, and then the WTRU 210 reports the RL failure. The inspection transmission is established so that in the cycle<i>T</i>_<i>ping</i>Check transmission occurs when there is no UL transmission in the.

Or, if the WTRU 210 does not receive the signal from the Node-B 220 in the designated time slot of the M period, the WTRU reports RL failure.

Figure 8 shows a timing diagram for monitoring RL failure. As mentioned in Figure 6 above, and for all trigger situations, the WTRU 210 may start transmission 805 on the E-DCH (ie, follow the AICH indication from the Node-B 220). The WTRU 210 may start monitoring the situation 810 when the offset T1 has passed since the time the WTRU 210 started transmission. The time offset parameter period allows sufficient time for the power control loop to converge. Additional grace week The period T2 can be introduced from the time when the monitoring trigger situation starts to the time 815 when the entity layer is allowed to report out of synchronization primitives. The additional grace period T2 allows additional time to stabilize the power control cycle. The periods T1 and T2 are time offset parameters, and the periods T1 and T2 can be pre-defined or configured by higher layers (ie, RRC signaling or broadcast channels). Note that in this particular case as a more general case, T1 and T2 can also take the value of zero individually or together.

Alternatively, when the WTRU 210 is not transmitting via E-DCH in the CELL_FACH state, it is configured to monitor RL quality. Specifically, the WTRU 210 in the CELL_FACH state, CELL_PCH state, or URA_PCH state can continuously monitor the quality of any other DL control channel (for example, CPICH). If the quality of the observed DL control channel drops below a predefined threshold within a predetermined time, the L1 of the WTRU 210 may signal the L3 of the WTRU 210 to indicate that an RL failure has occurred.

Figure 9 shows a flowchart for determining the triggering of Node-B where RL failure has occurred. In the CELL_FACH state, the WTRU may start transmission 905 via the E-DCH. The Node-B 220 monitors the E-DCH 910 on a predetermined window period. The Node-B 220 determines whether the quality of the associated control channel from the WTRU 210 is lower than a predetermined threshold 915. If the channel quality is not lower than the critical value, there is no RL failure 920, and the quality of the channel 910 continues to be monitored. If the quality is lower than the predefined critical value, the node-B 220 declares RL failure 925. The Node-B 220 may use a specific value of the E-AGCH to instruct the WTRU 210 to terminate E-RACH access 930. This happens on the WTRU through the main components of the WTRU. The indication may include signaling a zero authorization value or using a reserved value. Node-B 220 may terminate the connection with the WTRU 935.

Alternatively, the Node-B 220 may be configured to monitor the E-DCH 910 for feedback from the WTRU 210 during a predetermined window period. If the quality of the associated control channel (such as UL DPCCH, UL E-DPCCH, or UL HS-DPCCH) is lower than the predetermined threshold 915 for a predefined time, the Node-B 220 declares RL failure.

Alternatively, the Node-B 220 may monitor the transmission of the ACK or NACK feedback signal for the associated UL transmission. When the Node-B 220 transmits K NACKs in the predefined window L of continuous UL transmission, the Node-B 220 may declare RL failure.

Alternatively, the node-B 220 may monitor the success of the HARQ process, the node-B 220 is configured to monitor the HARQ process, and if R HARQ processes fail in a window of a predefined number of J times of new HARQ process attempts, the node- B 220 can declare RL failure.

Alternatively, the Node-B 220 may be configured to transmit S consecutive TPC increase commands (that is, an instruction from the Node-B 220 to increase its power) on the F-DPCH or DPCCH to the WTRU using the E-DCH in the CELL_FACH state 210. If the Node-B 220 transmits these commands but does not observe an increase in the received power from the WTRU 210 to which the commands were transmitted, the Node-B 220 may declare RL failure.

Alternatively, the Node-B 220 may be configured to receive S TPC increase commands on UL DPCCH, F-DPCH, or DPCCH (ie an indication from the WTRU 210 to increase its power), and if the Node-B 220 cannot further increase its transmission Power, the Node-B 220 can declare RL failure.

Alternatively, the Node-B 220 may be configured to instruct the WTRU 210 to release E-DCH resources via a high-speed shared control channel (HS-SCCH) instruction. The Node-B 220 may transmit, and the HS-SCCH command may be a command transmitted via the HS-SCCH control channel.

Alternatively, a new or existing L3 RRC message can be used to indicate to the WTRU 210 that it can stop transmission via E-DCH in the CELL_FACH state. Alternatively, the Node-B 220 may be configured to not respond to any UL transmission within the timeout period. Alternatively, the Node-B 220 may be configured to transmit K consecutive NACKs to the WTRU 210 on the E-DCH HARQ indicator channel (E-HICH).

Example

1. A method implemented in a wireless transmitting and receiving unit (WTRU) for detecting a radio link (RL) failure, the method includes: monitoring the quality of a dedicated physical channel (F-DPCH) of the downlink part.

2. As in the method described in embodiment 1, the method further includes: determining that the quality of the downlink F-DPCH for N consecutive frames is lower than a predefined threshold Q, where N is the number of predefined consecutive frames.

3. As the method described in any one of the embodiments 1-2, the method further includes: announcing the occurrence of RL failure; and terminating through the enhanced dedicated channel (E- DCH) transmission.

4. The method according to embodiment 3, wherein the termination of the E-DCH in the CELL_FACH state further includes: Release E-DCH resources; stop E-DCH reception and transmission procedures; and reset the media access control (MAC) entity.

5. The method according to embodiment 4, wherein the physical layer indicates to the MAC layer that the RL failure has occurred, and the MAC layer stops sending data to the physical layer.

6. As in the method described in embodiment 3, the method further includes after terminating the E-DCH transmission in the CELL_FACH state: waiting for a predefined amount of time; starting a backoff timer; and waiting before initiating another RACH access The fallback timer expired.

7. Like the method described in Embodiment 6, the method further includes that the WTRU performs cell reselection even if the timer has not expired.

8. As in the method described in any one of embodiments 6-7, the method further includes when the cell reselection criterion is met, the WTRU terminates the backoff timer and executes the cell reselection procedure.

9. A wireless transmitting and receiving unit (WTRU). The WTRU includes a processor configured to monitor the quality of a downlink partial dedicated physical channel (F-DPCH).

10. Like the WTRU described in embodiment 9, the WTRU further includes a processor configured to determine that the quality of the downlink F-DPCH for N consecutive frames is lower than a predefined threshold Q, where N is a predetermined The number of consecutive frames defined.

11. Like the WTRU described in Embodiment 10, the WTRU further includes: The processor is configured to declare the occurrence of the RL failure and terminate the transmission via the enhanced dedicated channel (E-DCH) in the cell forward access channel (CELL_FACH) state.

12. The WTRU described in embodiment 11, wherein the termination of the E-DCH in the CELL_FACH state further includes: releasing E-DCH resources; stopping the E-DCH receiving and transmitting procedures; and resetting the media access control (MAC) entity.

13. The WTRU in embodiment 12, wherein the physical layer indicates to the MAC layer that the RL failure has occurred, and the MAC layer stops sending data to the physical layer.

14. As the WTRU described in embodiment 11, the WTRU further includes after terminating E-DCH transmission in the CELL_FACH state: waiting for a predefined amount of time; starting a backoff timer; and waiting before initiating another RACH access The fallback timer expired.

15. Like the WTRU described in Embodiment 14, the WTRU further includes that the WTRU performs cell reselection even if the timer has not expired.

16. Like the WTRU described in Embodiment 15, the WTRU further includes that when the cell reselection criterion is met, the WTRU terminates the backoff timer and executes the cell reselection procedure.

17. The WTRU as in any one of embodiments 9-16, the WTRU further includes: the WTRU is configured to monitor the downlink dedicated entity control channel (DPCCH) quality.

18. Like the WTRU described in any one of embodiments 9-17, the WTRU further includes: the WTRU is configured to reselect a new cell and release E- if the post-verification procedure fails and if the cell reselection criterion is met. DCH resources.

19. The WTRU as described in embodiment 18, wherein if the cell reselection criterion is not met, the WTRU does not attempt to complete the transmission, and the WTRU is further configured to release the E-DCH resource; and the WTRU is configured to use Wait for the expiration of the predefined timer before the fallback process and the uplink random access attempt.

20. A wireless transmit and receive unit (WTRU), the WTRU includes: a processor configured to monitor the quality of the downlink part of the dedicated physical channel (F-DPCH) and determine the downlink F-DPCH for N consecutive frames The quality of is lower than the predefined threshold Q, and the verification fails after detection, where N is the predefined number of consecutive frames.

twenty one. Like the WTRU described in embodiment 20, the WTRU further includes a processor configured to terminate transmission via an enhanced dedicated channel (E-DCH) in the cell forward access channel (CELL_FACH) state.

twenty two. The WTRU as in embodiment 20, wherein if the post-authentication fails, the WTRU is configured to start a back-off timer, and once the timer has expired, it tries uplink random access.

twenty three. The WTRU as described in embodiment 20, wherein if the cell reselection criterion is met, the WTRU performs cell reselection; and the WTRU is configured to transmit even if the backoff timer has not expired.

twenty four. The WTRU as described in embodiment 20, wherein if the post-authentication fails, the E-DCH resource is released.

Although the features and elements of the present invention are described in specific combinations, each feature or element can be used alone without other features and elements, or used in various situations with or without other features and elements. . The method or flowchart provided here can be implemented in a computer program, software, or firmware executed by a general-purpose computer or processor. Examples of computer-readable storage media include read-only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, internal hard disks, and removable disks. Magnetic media, magneto-optical media, and optical media such as CD-ROM disks and digital versatile discs (DVD).

For example, suitable processors include: general-purpose processors, special-purpose processors, traditional processors, digital signal processors (DSP), multiple microprocessors, one or more microprocessors associated with DSP cores, Controller, microcontroller, dedicated integrated circuit (ASIC), field programmable gate array (FPGA) circuit, any kind of integrated circuit (IC) and/or state machine.

The processor associated with the software can be used to implement a radio frequency transceiver for use in a wireless transmit and receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer To be used in. WTRU may be compatible with hardware and/or software Combined use of form-implemented modules, such as cameras, camera modules, video phones, speaker phones, vibration devices, speakers, microphones, TV transceivers, hands-free headsets, keyboards, Bluetooth® modules, frequency modulation (FM) radio units , Liquid Crystal Display (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video game console module, Internet browser and/or any wireless local area network (WLAN) ) Or ultra-wideband (UWB) module.

<p>200Wireless communication system</p><p>210Wireless Transmitting and Receiving Unit</p><p>220Node-B</p><p>230CRNC</p><p>240SRNC</p><p>250Core Network</p><p>215, 225 processor</p><p>216,226Receiver</p><p>217, 227 transmitter</p><p>218,228antenna</p><p>300Function module block diagram</p><p>400Radio Interface Protocol Model</p>

The present invention can be understood in more detail from the following descriptions. These descriptions are given in the form of examples combined with diagrams. Among them: Figure 1 shows High Speed Downlink Packet Access (HSDPA)/High Speed Uplink Packet Access (HSUPA) RRC status; Figure 2 shows the wireless communication system; Figure 3 is a functional module diagram of the WTRU and base station of the wireless communication system shown in Figure 2; Figure 4 shows An example module diagram of the radio interface protocol model; Figure 5 shows a flow chart of the WTRU's behavior when the post-authentication process fails; Figure 6 shows the RL when the WTRU transmits on the E-DCH in the CELL_FACH state The flow chart of the failure trigger situation; Figure 7 shows a diagram of the WTRU's behavior when an RL failure is detected; Figure 8 shows a timing diagram for monitoring the RL failure situation; and Figure 9 shows the determination to occur The flow chart of the Node-B triggering the RL failure.