Wireless transmitting/receiving unit used for terminating message transmission on enhanced random access information channel

[0001] [0002] FIELD OF THE INVENTION [0003] The present application relates to a method of terminating an enhanced dedicated channel transmission (E-DCH) by means of a wireless transmission / reception unit (WTRU) and a wireless transmission unit / reception (WTRU) that employs the method. [0004] BACKGROUND [0005] In wireless communications systems, access to radio resources is controlled by a radio network. When a receive-transmit unit (WTRU) has data to transmit to the network, the WTRU requires access to radio resources before transmitting the data load. In a Third Generation Society Project (3GPP) network, the WTRU can transmit on the uplink using a contentious channel known as a random access channel (RACH). Because access to the RACH is contentious, a collision can occur when multiple WTRUs have access to resources simultaneously.

[0006] The current procedure for accessing the RACH in the 3GPP comprises a preamble phase with power elevation, followed by channel acquisition information and message transmission for random access. Since the RACH is a shared channel, so as to avoid sustaining the shared radio resource by the WTRU for a long time, only relatively short message loads are transmitted on the RACH; This leads to a relatively small data rate. The RACH is then used for the transmission of short control messages. Typically, the WTRU that demands higher data rates can be configured by the network to use dedicated resources.

[0007] The data rate supplied by the RACH is sufficient for the transmission of short control messages that support most voice communications, however it may be inefficient for the transmission of data messages associated with the new data services. that are not in real time such as Internet travel, e-mail, etc. For such data services, traffic is cut by nature and there may be long periods of inactivity between successive transmissions. For example, applications that require frequent transmission of stay-alive messages may result in inefficient use of dedicated resources. In such cases, it may be rather advantageous for the network to use shared resources for data transmission. However, the difficulty lies in the low data rate offered by the RACH.

[0008] To overcome these difficulties, it was proposed to use the enhanced dedicated channel (EDCH) in the CELLFACH state to increase the data rate of the shared channel.

[0009] Figure 1 is a diagram of an improved RACH access (E-RACH). The E-RACH procedure may include an RACH preamble phase and an E-RACH message phase. During the initial RACH preamble phase, the WTRU transmits a RACH preamble, it continues to transmit the preamble while raising the transmission power until it receives an initial allocation of resources. The WTRU can also perform a collision detection and resolution, if other WTRUs are trying to access the RACH during this time. Once the WTRU has received permission to access the RACH, the WTRU can transmit data until the resources are released or the WTRU undergoes a transition to another state.

[0010] As mentioned by Aniba, it was proposed to use the E-DCH in a CELL FACH state to increase the data rate of the shared channel. However, in the current standard, there are no methods to terminate the E-RACH message phase. Therefore, it would be beneficial to provide a method and apparatus for terminating an E-RACH message phase in an E-RACH.

[0011] SUMMARY [0012] A method and apparatus for terminating an E-RACH message phase in an E-RACH transmission is provided. Triggers are also provided for termination of the E-RACH message. Actions on termination of ERACH messages or transition to the CELLDCH state are provided in order to free the shared E-DCH resources while in the CELL FACH state. [0013] A method for terminating an enhanced random access channel (E-RACH) message in an E-RACH transmission that determines that a buffer is empty; trigger a transmission of programmed information (SI) with the value of the total buffer status (TEBS) of enhanced dedicated channel (E-DCH) equal to zero; determine the last transmission of hybrid automatic repeat request (HARQ) data; and release the E-DCH resource allocation is provided.

[0014] A method to terminate an enhanced random access channel (ERACH) message in an E-RACH transmission where the network waits until a HARQ buffer is empty and when the SI with a value of zero is received, the resources They are released.

[0015] BRIEF DESCRIPTION OF THE DRAWINGS [0016] A more detailed understanding of the following description can be obtained, given by way of example and to be understood in conjunction with the accompanying drawings:

[0017] Figure 1 is a diagram of an E-RACH access with an E-DCH;

[0018] Figure 2 shows a wireless communication system;

[0019] Figure 3 is a functional block diagram of a WTRU and the base station of the wireless communication system shown in Figure 2;

[0020] Figure 4 is a flow chart of an E-DCH resource allocation and de-allocation;

[0021] Figure 5 is a trigger diagram for starting the timer that the WTRU can start for the timers;

[0022] Figure 6 is a flow chart of a method for releasing EDCH resources based on the status of a WTRU queue or buffer;

[0023] Figure 7 is a flow chart of a network configured to determine the termination of an E-RACH message transmission;

[0024] Figure 8 is a flow chart of an E-DCH resource download when the WTRU undergoes a transition from the CELLFACH state to the CELLDCH state; and [0025] Figure 9 is a flow chart for downloading the E-DCH resources while in the CELL FACH state.

[0026] DETAILED DESCRIPTION [0027] When we refer to hereinafter, the terminology "wireless transmit / receive unit" (WTRU) includes but is not limited to a user equipment (UE), a mobile station, a mobile subscriber unit or fixed, a pager, a cell phone, a personal digital assistant (PDA), a computer or any other type of user device capable of operating in a wireless environment. When we refer to hereinafter, the term “base station” includes but is not limited to a Node-B, a site controller, an access point (AP), or any other type of interface device capable of operating in a wireless environment

[0028] When we refer to hereinafter, the term RACH and E-RACH can be used to describe a resource that is selected by a WTRU for access based on uplink contention. The term E-RACH resource can also indicate any combination of a mixer code, a channel code, a time slot, an access opportunity or a sequence of signatures that are associated with an E-RACH channel in a system architecture Future.

The term E-RACH may also indicate the use of E-DCH in CELLFACH, CELLPCH, URAPCH states or available mode.

[0029] When we refer to hereinafter, the term media access control entities (MAC) -e / is improved may refer to the MAC entities used to effect an E-DCH transmission in the CELL FACH state, which in the Download 8 is referred to as MAC-i / is. (MAC) -e / es and MAC-i / is are the MAC entities that handle the transport channel such as the enhanced dedicated transport channel (E-DCH). [0030] Figure 2 shows a wireless communication system 200 that includes a plurality of WTRU 210, a base station 220, a CRNC 230, an SRNC 240 and a central network 250. As shown in Figure 2, the WTRU 210 they are in communication with the base station 220, which is in communication with the CRNC 230 and the SRNC 240. Although three WTRU 210, a base station 220, a CRNC 230 and an SRNC 240 are shown in Figure 3, it should be noted that any combination of wireless and wired devices can be included in the wireless communication system 200.

[0031] Figure 3 is a functional block diagram 300 of a WTRU 210 and the base station 220 of the wireless communication system 200 of Figure 2. As shown in Figure 3, the WTRU 210 is in communication with the station base 220 and both are configured to effect a method to terminate the termination of a message in an E-RACH.

[0032] In addition to the components that can be found in a typical WTRU, the WTRU 210 includes a processor, 215, a receiver 216, a transmitter 217 and an antenna 218. The processor 215 is configured to execute a method for terminating the transmission of a message in an E-RACH. Receiver 216 and transmitter 217 are in communication with processor 215. The antenna 218 is in communication with both the receiver 216 and the transmitter 217 to facilitate the transmission and reception of the wireless data.

[0033] In addition to the components that can be found in a typical base station, the base station 220 includes a processor, 225, a receiver 226, a transmitter

227 and an antenna 228. The processor 225 is configured to execute a method to terminate the transmission of a message in an E-RACH. The receiver 226 and the transmitter

227 they are in communication with the processor 225. The antenna 228 is in communication with both the receiver 226 and the transmitter 227 to facilitate the transmission and reception of the wireless data.

[0034] Figure 4 is a flow chart of an allocation and de-allocation of E-DCH 400 resources that uses triggering for a WTRU. The first state corresponds to a WTRU 210 that operates with no E-DCH resources allocated to its 405. Once the uplink data (UL) has to be transmitted, WTRU 210 requests the E-DCH resources from the network, transmitting a preamble and wait for the response of the acquisition indication channel (AICH). In other words, WTRU 210 may remain in this state until it receives a positive acknowledgment (ACK) on the AICH, or a negative acknowledgment (NACK) on the AICH followed by an allocation of resources on the A-AICH, which can also be referred to as WTRU 210 that receives an E-DCH index. After receiving the E-DCH resource allocation, the WTRU may undergo a transition to the next state where the E-DCH resources are allocated for enhanced uplink transmissions 410. The WTRU 210 may use these E-DCH resources for transmission. UL until it receives a shot, at which point WTRU 210 will release resources 415. After WTRU 210 releases resources, it returns to the initial state. As will be described in more detail below, the trip may be timer based, may be based on the WTRU buffer status, or may be based on signaling from the RNC or Node-B 220.

[0035] In a personification, the WTRU 210 can be configured to include a timing module. The timing module may include multiple timers, where a timer may be associated with each logical channel or each MAC-d flow. The timer module can be configured to indicate the maximum allowable transmission time for a logical channel (that is, dedicated control channel (DCCH), dedicated traffic channel (DTCH), common control channel (CCCH), etc.) The values ​​for the timer module can be pre-configured or signaled to the WTRU 210. The timers can be activated during the first transmission of the WTRU 210, once an E-DCH resource index is received. The WTRU can be configured to release an E-DCH resource during the expiration of its associated timer. For example, WTRU 210 may be configured to release a common E-DCH resource when the maximum common E-DCH resource allocation time for the CCCH has been reached. This personification would allow the flexibility to configure a shorter transmission time duration for a logical channel such as CCCH.

[0036] The timing module can also be configured based on a logical channel identity and the absence of an E-DCH radio network temporary identifier (ERNTI). More specifically, a maximum E-DCH allocation time can be assigned to the CCCH transmission when an E-RNTI is not present. If the timer expires, and the WTRU 210 that is making a CCCH transmission does not have the E-RNTI present, the E-RACH access is terminated and the resources are released. If a CCCH transmission is occurring and an E-RNTI is present, (which may occur during the period cell update procedure) when WTRU 210 is not configured to have a maximum E-DCH allocation time and timer will not affect WTRU 210.

[0037] Alternatively, the network may configure the transmission duration timer based on the presence or absence of an E-RNTI. The WTRU 210 may be configured to have a maximum E-DCH allocation time if it has data (user plane or control plane) to transmit and no E-RNTI is present. Otherwise, if an E-RNTI is present, WTRU 210 is not configured with a maximum E-DCH allocation time.

[0038] Figure 5 shows a trigger diagram for starting the timer that WTRU 210 can start for timers T, and T₂ 500. Timers such as collision resolution Ti and CCCH T timer₂ they are started according to one of the triggers 501 to 505. This embodiment may include any combination of at least one of the trigger 501-505 shown to start the timer 506. The timer may start if an ACK associated with the transmitted preamble signature is received in the AICH or E-AICH 501. The timer can start as soon as the radio resource control (RRC) supplies the MAC with the timer values ​​and after receiving the E-DCH 502 resource index. The timer can start if the WTRU 210 starts the first transmission dedicated preamble 503 physical control channel (DPCCH). The timer may start when the initial transmission of DPCCH is completed after the transmission time intervals (TTI) of E-DCH transmission retracement or the first MAC protocol data unit (PDU) is passed to the layer physical 504. Or the timer can start when the WTRU 210 starts the transmission of E-DCH 505. In addition, WTRU 210 may initiate the timer when the absolute channel of E-DCH grant (E-AGCH) of collision resolution carrying E-RNTI WTRU 210 is received. Other triggers can also be used as designated.

[0039] Alternatively, the timer module of the WTRU 210 can be configured such that the time length available for the WTRU 210 is based on the number of data bits that need to be transmitted. The variable time length for the WTRU 210 may also be based on the radio link controller (RLC) number or MAC PDU. Additionally, it can also be based on the number of RLC service data units (SDUs).

[0040] Alternatively, the E-RACH message duration can be set to either 10 msec or 20 msec (as specified in current 3GPP standards). As a result, the E-RACH message phase may be active for a maximum number of frames or subframes. An ERACH message duration information element (IE) may be broadcast as part of the system information broadcast (SIB), or it may be included as part of the Ll signaling. For example, the E-RACH message duration IE may be transmitted with the initial allocation of resources or during the collision resolution phase. In addition, the ERACH message duration may be linked to an access service class.

[0041] Alternatively, the WTRU 210 can count the number of transmissions and retransmissions and use the count as a trigger to stop the transmission of the E-RACH message phase. For example, if WTRU 210 is configured for the type of operation to repeat the automatic repeat request (ARQ) and transmission in consecutive TTIs, then the WTRU can be configured to terminate the transmission of the E-RACH message phase afterwards. K. retransmissions It is noted that the value of K can be configured in the WTRU, broadcast as part of the SIB, or signaled during the E-RACH assignment phase.

[0042] Figure 6 is a flow chart of a method for releasing EDCH resources based on the status of a queue or buffer of WTRU 210. When WTRU 210 has data in the transmit buffer, WTRU 210 can transmit the data 605. After a transmission, the WTRU can check if the transmit buffer is empty 610. If the transmit buffer is empty, then the WTRU 210 will transmit the data found in the buffer 605. If the transmit buffer is empty 610 (that is, the Total E-DCH Buffer Status (TEBS) is equal to zero), it is optionally checked if an inactivity timer has expired 615. If the inactivity timer has expired, then the WTRU 210 can be configured to transmit a special or reserved value of the SI where the TEBS is set to zero 620. WTRU 210 may be configured to release the E-DCH resource 630 after the inactivity timer has expired 615, where the inactivity timer is started once the TEBS is equal to zero. The WTRU is considered to be inactive, if no UL or downlink traffic (DL) has been received. Alternatively, implicit release timers (that is, the idle timer) can be re-started based on a trigger mechanism when WTRU 210 decodes its H-RNTI in the high-speed shared control channel (HS-SCCH) . Once the idle timer has expired, WTRU 210 can be configured to transmit a special or reserved value of SI 620. For example, the special or reserved value of the SI may comprise a TEBS with a value set at 620. The SI with the TEBS set to zero may be used to signal to the network to release the resources. After successfully transmitting the SI and emptying the HARQ 625 buffers, the WTRU 210 releases the resources of E-DCH 630.

[0043] Alternatively, WTRU 210 can transmit a signal to the network indicating release of resources. The signal may comprise a special combination of the SI and a Cheerful Bit, a new MAC signaling, where a special combination of MAC header fields can be re-interpreted. Alternatively, a field may be added in the enhanced MAC-e header or MAC-e Analyzer by signaling a request to terminate the transmission of the E-RACH message phase. For example, WTRU 210 can transmit this signal to the network via a reserved combination of data description indicator (DDI). In another alternative, the signal may be a new RRC message; special value of the enhanced transport format combination index (E-TFCI) field in the E-DPCCH or special combination of the E-DPCCH fields; or a new message from Ll. The final decision to release resources can be determined by the network; which may indicate the release of resources back to WTRU 210. Alternatively, WTRU 210 can simply stop the transmission of the E-DCH as a means of indicating the termination of the E-RACH message phase, at which point the Network can free radio resources.

[0044] Alternatively, the timer module may be configured to start when WTRU 210 has transmitted all the PDUs that were present when the E-RACH was started, or the buffer has passed a predetermined threshold level. The threshold level can be an absolute value or based on a relative measurement using an initial tail size.

[0045] Release the resources during the transmission of all PDUs in the buffer that pass a predetermined threshold level, can release the E-RACH resources for other WTRU 210. For example, the threshold levels can be set to allow the network exchange equity between WTRU 210 and transmission delay. These levels can be configured through system information or they can be preconfigured in WTRU 210.

[0046] In addition, there may be procedures for physical layer that can trigger a termination of the E-RACH message transmission. This includes cell re-selection and measurements controlled by the occasions of FACH measurement or radio link failure (RL) detection.

[0047] Alternatively, the WTRU 210 may suspend all transmissions during the measurement occasion. Also, the programmer at Node-B 220 may be aware of the measurement occasion and may also suspend any concession downlink transmission, ACK or NACK. By summarizing a normal operation, the network can optionally transmit an initial grant so that the power control loop can be restored. Or the network can wait for an indication from the WTRU 210 using a preamble power ramp or similar procedure. Optionally, the WTRU 210 may indicate the reason for termination in the termination signal or the termination message. Reasons for termination of ERACH may include an RL failure and complete E-RACH transmission.

[0048] Figure 7 shows a flow chart of a network configured to determine the termination of an E-RACH 700 message transmission. The termination of an E-RACH message phase may be established by the network based on the receipt of the amount of data indicated in an initial SI 705 by the Terrestrial Radio Access Network (UTRAN) of the Universal Mobile Telecommunications System (UMTS). Alternatively, it can be established based on the UTRAN that receives the amount of data indicated in subsequent SIs or indicated using a different mechanism. UTRAN can use the SI values ​​to determine when to end the transmission of the message. More specifically, an SI with TEBS set to zero 710 signals to the network that WTRU 210 is releasing the resources once the data transmission in the HARQ buffers is completed. The UTRAN releases the resources of E-DCH 720 after SI with TEBS set to zero is received and there is no further transmission of HARQ (715).

[0049] Alternatively, the UTRAN can simply turn off the transmission of the associated FDPCH and the explicit additional signaling is not used. This approach can be used in the case where both WTRU 210 and the network were aware that the transmission will be terminated.

[0050] Alternatively, it can be transmitted every time the buffer occupation changes. Alternatively, an SI can be transmitted every time the buffer occupation changes by a predefined or signaled amount (that is, additional data is received in the buffer), even if the new data is not from higher priority logical channels. If the TEBS is equal to zero then the SI trigger mechanism can be modified to allow the SI to be transmitted. The SI with the TEBS set to zero indicates to the network that the WTRU is releasing the resources once the data transmission in the HARQ buffers is completed and the UTRAN also the E-DCH resources. Alternatively, an SI may be transmitted on each HARQ transmission when WTRU 210 is in CELL FACH state or occupying E-RACH resources.

[0051] In another termination option, the UTRAN can explicitly signal the end of the E-RACH transmission. Once UTRAN determines the end of the E-RACH message transmission, it signals to WTRU 210 transmitting a special value on the E-AGCH (for example, a 0 grant). Or the UTRAN signals to WTRU 210 by transmitting an RRC message on the FACH or on the High Speed ​​Downlink Shared Channel (HS-DSCH) if the WTRU 210 is configured for HS-DSCH in CELL FACH state. Alternatively, the network signals to WTRU 210 using Ll signaling. This may include stopping the fractional dedicated physical channel (F-DPCH) or transmitting a flag or combination of the pre-determined fields on the HS-SCCH if if WTRU 210 is configured for HS-DSCH in CELL FACH state, for example, using an order of HS-SCCH.

[0052] Alternatively, the termination of the E-RACH message may be established based on a lack of activity on the dedicated physical data channel (E-DPDCH) or enhanced DPCCH transmission (E-DPCCH).

[0053] The termination of the E-RACH portion may also be established based on the status of WTRU 210 programming requests. As an example, UTRAN can monitor the status of SI or Bit Cheerful received. If this information indicates low usage, the network may decide to terminate the current transmission of the message from

E-RACH so that the other WTRU 210 can have an opportunity to access resources. Alternatively, if this information indicates high use and a continuing need with the Cheerful Bit set to non-cheerful, then UTRAN may decide to transition from WTRU 210 to the CELLDCH state. As another alternative, UTRAN can use the traffic volume measurement report (such as the uplink RRC measurement report) to determine that WTRU 210 does not have any subsequent amount of data or small amount of data to transmit.

[0054] Alternatively, the UTRAN may implicitly signal WTRU 210 to release the E-RACH resource by not transmitting predefined physical channels or signals for a predetermined amount of time. In other words, WTRU 210 releases E-RACH resources if it receives no transmission from UTRAN on any E-AGCH channel destined for WTRU 210, E-RGCH associated with the E-RACH resource that is used by WTRU. 210, F-DPCH associated with the ERACH resource that is used by WTRU 210, and / or HS-SCCH or high-speed physical downlink shared channel (HS-PDSCH) that is destined for WTRU 210.

[0055] Optionally, the UTRAN may indicate the reason for termination in the termination signal or termination message. Reasons for termination of ERACH CELLFACH status may include, but are not limited to RL failure, completion of E-RACH transmission and network congestion.

[0056] Figure 8 is a flow chart of the E-DCH resources released when the WTRU undergoes transitions from the CELL FACH state to the CELL DCH state. WTRU 210 operates without any E-DCH resources allocated 805. Upon receiving an E-DCH resource allocation on the AICH or E-AICH or a NACK on the AICH followed by an resource allocation index on the E-AICH, which may also be referred to as WTRU 210 receiving a E-DCH index, WTRU 210 can access the E-DCH resources assigned to it in state CELL_FACH 810. The WTRU 210 retains control of the E-DCH resources until it receives a re-configuration message, (for example, via the FACH or the HS-DSCH), indicating that a change to the CELL DCH state can be made. E-DCH resources are then released 815. And WTRU 210 may undergo a transition to CELL DCH 820 state. If UTRAN reconfigures WTRU 210 to CELL DCH state with dedicated E-DCH resources while WTRU 210 is transmitting over the E-RACH, then the WTRU

210 You can free the E-RACH resources at the activation time specified in the re-configuration message in the case of a synchronized re-configuration. Alternatively, the WTRU 210 may release the E-RACH resources at a fixed delay before or after the activation time. Alternatively, WTRU 210 can release E-RACH resources immediately upon receiving the RRC reconfiguration message.

[0057] Additionally, WTRU 210 can be configured to release E-RACH resources at the same time while configuring it for a transmission over dedicated E-DCH resources. Alternatively, the WTRU 210 may release the E-RACH resources at a fixed delay before or after it is configured for a transmission using the dedicated E-DCH resources; or release ERACH resources once WTRU 210 is fully synchronized with UTRAN with dedicated E-DCH resources.

[0058] Figure 9 is a flowchart of a procedure for releasing E-DCH resources while in the CELLFACH state or available mode, when E-RACH termination trips occur. The WTRU 210 begins the E-RACH 905 termination process. The WTRU 210 can be configured to stop any E-AGCH, E-RGCH and E-HICH reception processes that are occurring 910. The WTRU 210 can also be configured to stop any E-DPCCH and E-DPDCH transmission procedures that are occurring 915. The WTRU 210 can then perform a MAC 920 reset procedure and release the HARQ 930 Buffer. The improved MAC-e / re-start procedure may include emptying the HARQ processes, discarding any remaining segments in the MAC-e / segmentation entity is improved and re-setting the value of the sequence number of ACTUAL transmission (TSN) to zero. Alternatively, if the remaining segment is from a DTCH or DCCH logical channel, WTRU 210 may summarize the transmission of the segment in a remaining process. An indication can be transmitted to the SRNC via Iub signaling to discard any stored segment and reset the reorder numbers of TSN.

[0059] If the E-DCH is terminated and the DTCH or DCCH transmission is active, WTRU 210 can empty the HARQ 930 processes and discard any remaining segments in the MAC-i / is segmentation entity.

[0060] In other logical channels or queues of the MAC-i / is entity that do not correspond to the CCCH are not reset. Node-B 220 can be configured to perform a restart of the MAC-i / is entity of the CCCH. In other words, any segment can be discarded and the expected TSN is set to its initial value. If the MACis entity is in CRNC 230, Node-B 220 uses Iub signaling indicating the entity

MAC-is to perform a restart. In addition, the MAC-i entity associated with the EDCH resource is restarted (that is, the soft HARQ buffers are emptied).

[0061] When WTRU 210 performs a complete MAC-i / is restart, the MACis entity in SRNC 240 can be notified via a new Iub / Iur signaling that E-RACH access has been terminated; thus the MAC-is entity in SRNC 240 can also perform a restart. More specifically, when Node-B 220 terminates the EDCH connection with WTRU 210, it releases E-DCH resources, empties HARQ buffers and notifies SRNC 240 or CRNC 230 that the connection has been terminated and thus CRNC 230 o SRNC 240 also performs a MAC reset. CRNC 230 or SRNC 240 is notified via Iub or Iur signaling. A new control bit can be introduced in the Iub or Iur frame format or a new frame format can be defined to signal the release of resources to SRNC 240 or CRNC 230.

[0062] Also, optionally, the MAC-i / is reset or only by discarding the segments can be performed after a time interval (Tr) due to the termination of the E-RACH resource. The timer is also started on the network side. Tr can be a configured system timer signaled to WTRU 210 via RRC message, via system information block (SIB), or preconfigured in WTRU 210. The timer is started as soon as the E-DCH resources are terminated in the WTRU 210.

[0063] The WTRU 210 can be configured to stop the timer if it is running and if the WTRU 210 intends to perform an E-RACH access. Also, WTRU 210 can stop the timer, if WTRU 210 intends ERACH access and obtains the assigned E-DCH resources, or WTRU 210 obtains the assigned E-DCH resources and resolves the contention resolution phase.

[0064] Alternatively, the WTRU 210, the Node-B 220 and / or the RNC can be configured with a TSNRE-FIXER TIMER, where the WTRU 210 is configured to perform a TSN reset when the timer expires. Optionally, WTRU 210 can perform a complete MAC-e / reset procedure is improved when the timer expires.

[0065] E-DCH resources are released when a transition occurs from CELL FACH to CELL DCH.

[0066] The WTRU 210 and the RNC may set the value of the last used TSN number (that is, CURRENT TSN) to the initial value during the release of the fixed E-DCH resource that is used by the WTRU 210. The WTRU 210 and the RNC can both include synchronized timers, where the expiration of the timer signals the release of E-DCH resources. After the timer expires and the resources are released, WTRU 210 can restart the TSN and optionally perform a complete MAC-e / reset procedure is improved.

[0067] Alternatively, UTRAN can order the release of resources. The UTRAN can signal the WTRU indicating that resources must be released. In this case, upon receipt of the message, WTRU 210 and UTRAN set the TSN to an initial value. [0068] Alternatively, the TSN number can be set at the expiration of the inactivity timer. In this case, an inactivity timer can be started on both WTRU 210 and the network after the last MAC-e PDU is transmitted and received, respectively. If the timer expires, the WTRU 210 and and the RNC sets the TSN to its initial value. Optionally, a complete MAC-e / reset procedure can be performed is improved.

[0069] In another alternative, the TSN number may not be set. The last TSN values ​​used are stored in memory and continuously incremented by each new transmission, despite the fixed E-DCH resource that is used or the time in which the transmission is taking place.

[0070] Alternatively, the TSN number can be set to its initial value and optionally a complete MAC-e / reboot can be completed when a cell re-selection occurs. Resetting the TSN or MAC-e / es can always occur after the WTRU performs cell re-selection. Alternatively, it can only occur when a relocation of the serving radio network subsystem (SRNS) occurs. The RNC can signal the restart of TSN via a MAC-e / reset indicator is explicitly improved or the WTRU 210 can implicitly detect that an SRNS relocation has occurred due to the presence or change of a new UTRAN RNTI (URNTI) .

[0071] PERSONIFICATIONS

1. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

Determine that a buffer is empty.

two. The method as in personification 1 further comprises triggering the transmission of a programming information (SI) with a total status of enhanced dedicated channel buffer (TEBS) equal to zero;

determine a last HARQ data transmission; and release an E-DCH resource allocation.

3. The method as in any of the personifications 1-2, wherein an inactivity timer is started when the buffer is empty.

Four. The method as in personification 3, where the transmission of the SI is triggered when the inactivity timer expires.

5. The method as in personification 3, where the inactivity timer is reset upon receipt of the data.

6. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

receive initial programming information (SI) with a total status of enhanced dedicated channel buffer (TEBS) (E-DCH); and determine that the TEBS is equal to zero.

7. The method as in personification 6, further comprises waiting until a hybrid automatic repeat request (HARQ) buffer is empty; and release an E-DCH resource allocation.

8. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

release the E-RACH message during the transition from the cell forward channel status (CELL FACH) to the cell dedicated channel status (CELL DCH).

9. A wireless transmit / receive unit (WTRU), comprising:

a receiver configured to receive enhanced dedicated channel (E-DCH) resources over an acquisition indication channel (AICH) and an AICH E-DCH (E-AICH).

10. The WTRU as in personification 9, furthermore comprises a processor configured to access E-DCH resources in the forward-facing cell (CELL FACH) state, to receive a reconfiguration message indicating change to a state of dedicated cell channel (CELL DCH), and to free E-DCH resources based on the change to the status of CELL DCH.

eleven. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

receive an explicit E-DCH termination signal; and release an E-DCH resource.

12. The method as in personification 11, wherein the explicit E-DCH termination signal comprises a special value signaled in an E-DCH absolute concession channel (E-AGCH).

13. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

Start a timer in response to a shot.

14. The method, as in personification 13, further comprises releasing a resource allocation for the current control channel (CCCH) when a maximum allowable transmission time has been reached for the CCCH.

fifteen. The method as in personification 14, wherein a maximum enhanced dedicated channel allocation time (E-DCH) is assigned to the CCCH transmission when an E-DCH radio network temporary identifier (E-RNTI) is not Present.

16. The method as in one of the personifications 13-15, wherein the timer starts when a positive acknowledgment (ACK) associated with a transmitted preamble signature is received on an acquisition indication channel (AICH) or an enhanced dedicated channel (E -DCH) (AICH) (E-AICH).

17. The method as in one of the personifications 13-16, wherein the timer starts when the radio resource control (RRC) provides timer values ​​to the media access control (MAC) and after receiving a channel's resource index Enhanced Dedicated (E-DCH).

18. The method as in one of the personifications 13-17, wherein the timer starts when a wireless transmit / receive unit (WTRU) starts first transmission of dedicated physical control channel preamble (DPCCH).

19. The method as in one of the personifications 13-18, wherein the timer starts when the first DPCCH transmission is completed after an enhanced dedicated channel transmission (E-DCH) strips transmission time intervals (TTI) or a first unit Data access protocol (PDU) media access (MAC) is passed to a physical layer.

twenty. The method as in one of the personifications 13-19, wherein the timer annihilates when a wireless transmit / receive unit (WTRU) starts an enhanced dedicated channel transmission (E-DCH).

twenty-one. The method as in one of the personifications 13-20, wherein a wireless transmit / receive unit (WTRU) can initiate the timer when an absolute dedicated channel (E-AGCH) collision resolution of an enhanced dedicated channel (E-AGCH) -DCH) bearing the temporary radio network identifier (E-RNTI) of EDCH of the WTRU is received.

22 A wireless transmit / receive unit (WTRU), comprising:

a processor configured to release enhanced dedicated channel (EDCH) resources when a maximum allowable transmission time for a common control channel (CCCH) has been reached.

2. 3. A method of terminating an enhanced random access channel (ERACH) message in an E-RACH transmission, the method comprises:

terminate the E-RACH message in case of cell reselection or radio link failure.

24. A Node-B comprising:

a processor configured to determine an end of enhanced random access channel message transmission (E-RACH).

25. The Node-B as in the embodiment 24, also comprises a transmitter connected to the processor, the transmitter is configured to transmit a special value on the absolute dedicated channel (E-AGCH) of the enhanced dedicated channel (E-DCH) indicating the end of the transmission.

26. A method for releasing enhanced dedicated channel (E-DCH) resources while in a forward-facing cell (CELL FACH) state, the method comprises:

Termination reception procedures for an Enhanced Dedicated Dedicated Channel (E-DCH) absolute concession channel (EAGCH), a relative concession channel (ERGCH) and a Hybrid Auto Repeat Request (HARQ) request indicator channel (E-HICH) of E-DCH.

27. The method as in personification 13 also comprises termination reception procedures for an E-DCH dedicated physical control channel (E-DPCCH) and dedicated physical data channel (E-DPDCH); and reset the media access control entity (MAC).

28. The method as in one of the personifications 26-27, wherein the channels are terminated when an enhanced random access channel (E-RACH) transmission signal has been received.

29. The method as in one of the personifications 26-28, wherein the channels are terminated when the common control channel timer (CCCH) has expired.

30 The method as in one of the personifications 26-29, where the channels are terminated when the programming information (SI) is equal to zero.

31. The method as in one of the personifications 26-30, wherein the procedures of initiating MAC include emptying the hybrid automatic repeat request (HARQ) processes, discarding the remaining segments in the segmentation entity of the MAC entity and re-fixing a transmission sequence number (TSN) value to zero.

32 The method as in one of the personifications 26-31, where the resources are released when an inactivity timer expires.

[0072] Although the features and elements of the present invention are described in the preferred personifications in particular combinations, each feature and element can be used only without the other features and elements of the preferred personifications or in various combinations with or without other features and elements. of the present invention. The methods or flowcharts provided in the present invention can be implemented in a computer program, software, or memory chip tangibly enclosed in a computer readable storage medium for execution by a general purpose computer or processor. Examples of computer readable storage media include read-only memory (ROM), random access memory (RAM), a recorder, cache memory, semiconductor memory devices, magnetic media such as internal hard drives and removable disks , magneto-optical media, and optical media such as CD-ROM discs, and digital versatile discs (DVDs).

[0073] Suitable processors include, for example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP center, a controller, a microcontroller, Application Specific Integrated Circuits (ASIC), Field Programmable Gate Array Circuits (FPGA), any other type of integrated circuit (IC), and / or a state machine.

[0074] A processor in association with the software can be used to implement a radio frequency transmitter-receiver for use in a wireless receiving transmission unit (WTRU), user equipment (UE), terminal, base station, network controller radio (RNC), or any host computer. The WTRU can be used in conjunction with modules, implemented in hardware and / or software, such as a camera, a video camera module, a videophone, a speaker phone, a vibration device, a speaker, a microphone, a transmitter - TV receiver, a hands-free headset, a keyboard, a Bluetooth® module, a radio frequency modulated (FM) unit, a liquid crystal display unit (LCD), an organic light emitting diode display unit (OLED), a digital music player, a media player, a video game player module, an Internet viewer, and / or any wireless local area network (WLAN) module or Ultra Wide Band (UWB) module.