MXPA06008050A - Direct transition to cell dch - Google Patents

Abstract

The present invention relates to methods and arrangements for reducing the time delay associated with the initialisation of a data transfer in a UMTS Radio Access Network. The Radio Network Controller, RNC, (102) connectable to a UMTS network and to a plurality of User Equipments, UEs, (108) wherein the UEs are capable of being in the states, URA PCH, CELL PCH, CELL FACH or CELL DCH, comprises means for handling a data transfer initiating message, means for introducing a delay reducing information in the data transfer initiating and means for transferring the UE from the URA PCH or the CELL PCH state directly to the CELL DCH state by means of the delay reducing information in the data transfer initiating message.

Description

PG, PH. PL PT. RO. RU. SC, SD, SE, SG, SK. SL SM. SY, - as the applicant's ent? Emmem claim the priority of the TJ, TM. TN, TR, TI ', TZ UA, UG. UZ VC. VN, YU, Z \, earlier application (Rule 4.17 (iii)) for thefollowing desig-ZM, ZW. ? RIPO paienl (BW, GH, GM, KE. LS, MW, MZ nalion US N? SD. SL SZ TZ UG.ZM, ZW). Eurasian palent (AM, - ofinvemorship (Rule 4.l7 (iv)) for US only AZ, BY, KG, KZ MD, RU, TJ, TM). Eumpean patent (AT, BE. BG, CU, CY, CZ, DE.DK, EE, ES, Fl, GB, GR, Published: HU, / £ ¡S, IT, LT, LU, MC, NL PL PT, RO SE, SK, - with internatt'onal search report TR), OAPlpatem (BF, BJ, CF. CG, Cl, CM, GA, GN, GQ, GW, ML MR, NE, SN, TD. , TG) as ¡o ihe applicaní 's enlu' lemeni what is claimed priorily afilie For two-leler codes and other abbreviations, referred to the "Guidearlier application (Rule 4. l7 (iii)) for ihefoüowing desig- ance Notes on Codes and Abbrevialions "appearing at the begin-swim US no ofeach regular issue of the PCT Gazette.

DIRECT TRANSITION TO CELL DCH FIELD OF THE INVENTION The present invention relates to methods and arrangements in a mobile communications network. In particular, the present invention relates to methods and arrangements for reducing the time delay associated with the initialization of a data transfer in a UMTS Radio Access Network (UTRAN). BACKGROUND OF THE INVENTION Figure 1 shows a Universal Mobile Telephone System (UMTS). The UMTS network comprises a Central Network (CN) 100 that can be connected to other networks such as the international network, other mobile networks, for example, GSM systems and fixed telephony networks called POTS in Figure 1. The CN 100 is connected to a plurality of radio network controllers (RNCs) 102 belonging to the UMTS Radio Access Network (UTRAN). The respective RNC 102 controls a plurality of Nodes B 104 comprising one or more base stations. Each base station covers an area, i.e., a cell 106 and is arranged to service the mobile terminals within said cell. Finally, mobile terminals 108, also referred to as User Equipment (UE), are connected to one or more base stations 104.

In the UTRAN a user equipment (UE) can be in one of several states depending on the activity of the user.

These states include the Inactive Mode, URA-PCH, CELL-PCH, CELL-FACH and CELL-DCH, listed in order of user activity. In Cell_PCH and URA_PCH, communications are not possible and minimum radio and battery resources are consumed. When the UE has data to send, it needs to transmit a Cell Update message to the UTRAN, indicating that the uplink data is available. When the UTRAN has data to send to a UE in CELL_PCH or URA_PCH, it needs to send a message of 'paging to the UE, and the UE responds a message of Cell Update to indicate in which cell it is located. In CÉLULA_FACH, communications are possible but with low data rate and high round trip time due to the properties of the shared channel used in this state. A UE in this state consumes more radio resources compared to C_CUL_V / URA_PCH but fewer resources compared to DCH_CELL. In CELL_DCH, the UE has a dedicated channel available, which implies that communications with high data rate and low round trip time are possible.

The CELL_DCH status provides the best user efficiency in terms of the data rate, but also consumes most resources, for example, in terms of energy and codes. Therefore, it may be necessary to move users to lower states when data transmission is stopped. A typical case for many applications is that data transmission occurs so infrequently that the UE is in the status CELL_PCH or URA_PCH when it starts a transmission of data in bursts. This implies that the delay for the movement of CELL_PCH / URA_PCH to CELL_DCH needs to be minimized, to have a good user efficiency. If the application transmits small data objects, the time to change the state will have a more significant impact on user efficiency than the data rate on DCH. A Tighten to Talk service is an example. Where rather small objects are transmitted very infrequently. This service could start with a burst of the lateral network if the Terminal in CELL PCH / URA PCH is the receiver of the conversation burst. In this delay to transmit a data object (including the transition to CD_CELL) is largely determined by the time to move from CELL / UPA_PCH to CCH_DCH. When a UE in CELL / URA_PCH needs to transmit uplink data, the typical signaling sequence is shown in Figure 2. In step 1, the UE transmits a cell update message to indicate that it has uplink data available to transmit them. In step 2, the UTRAN responds by transmitting a Cell Update Confirmation message, which legitimizes the Cell Update Message and instructs the UE to enter the CELL_FACH state, where data transmission is possible. In step 3, the UE transmits a UTRAN Mobility Information Confirmation message to legitimize the Cell Update Confirmation message. It is now possible for the UE to transmit the data in RACH, that is, in the PHIL_CELL state. If the amount of data available, which is denoted by the Traffic Volume in the 3GPP specifications, is above a configured threshold, the UE transmits a Measurement Report to inform the UTRAN about the amount of data available (step 4) . When the UTRAN receives the Measurement Report it can decide to move the UE to CELL_DCH since RACH has very limited efficiency. The UTRAN therefore sends a Re-configuration message of the Radio Bearer in step 5, to move the UE to CD_CELL. The UE responds with a Confirmation message of Re-configuration of the Radio Bearer in step 6, which legitimizes the received message. Now the UE has entered into CCH_DCH and can transmit the data in the DCH.

Also, Figure 3 represents the typical signaling sequence when a UE in CELL / URA_PCH needs to receive uplink data. In step 1 the UE receives a paging message. The UE will respond to such paging message. In step 2, the UE responds to the paging message by transmitting a Cell Update message to indicate that it has received the paging message. In step 2, the UTRAN responds by transmitting a Cell Update Confirmation message which legitimizes the Cell Update Message and instructs the UE to enter the CELL_FACH state, where data transmission is possible. In step 4, the UE transmits a Mobility Information Confirmation message from the UTRAN to legitimize the Cell Update Confirmation message. It is now possible for the UE to receive the data in the FACH (that is, it is in the FACH_COLL status). If the amount of data available with buffer for this UE in the RNC (denoted Traffic Volume in the 3GPP specifications) is sufficiently high as evaluated by the UTRAN, it may decide to move the UE to CCH_DCH as the FACH has very limited efficiency . Therefore the UTRAN transmits a message of Reconfiguration of the Radio Bearer in step 5, to move the UE to CELL_DCH. The UE responds with a Complete Radio Bearer Reconfiguration message in step 6, which legitimizes the received message. Now the UE has entered into CCH_DCH and can receive the data in the DCH. Another alternative for moving a CELL / URA_PCH UE to DCH CELL is represented with the help of Figure 4. According to this alternative it is also possible to order the UE with the 3GPP specifications to CCH_DCH directly in the Cell Update confirmation message. This would result in a signaling sequence as shown in Figure 4. In this alternative, the UTRAN instructs the UE to CDC_CELL already in the Cell Update Message in step 2. The UE responds with a Complete Reconfiguration message from the Radio bearer in step 3 and can then start transmitting the data in the DCH. Correspondingly, Figure 5 shows an alternative signaling sequence for moving a UE of CELL / URA_PCH to CELL_DCH in the case of a transmission initiated by the UTRAN. Here, the UTRAN commands the UE to CD_CELL already in the Cell Update Confirmation Message in step 3. The UE responds with a Complete Radio Bearer Reconfiguration message in step 4, and can then begin to receive the data in the DCH. The alternative signaling sequence for the transmission initiated by the UE described above in Figure 3 is much faster than the normal sequence. In practice the time to move from CELL / URA_PCH to CELL_DCH reduced by more than half. However, this alternative sequence also implies the problem that the UTRAN does not have information about the amount of data that the UE has available for transmission. The Cell Update message only contains a cause value that indicates the cause for the cell update, in this case the "uplink data transmission". This means that the UTRAN must move the UE to CD_CELL without knowing if it is necessary or even desirable. For small data objects the transmission time in CELL_FACH is less than for CELL_CHD due to the relatively long delay for the configuration of the DCH channel. Therefore, this would in fact reduce user efficiency if the UE moves to CD_CELL when the amount of data available is small. Since this consumes the resources of the network to move users to the DCH, these resources are wasted if the UE moves to the DCH when there is no need. Returning to Figure 5, the alternative signaling sequence for the transmission initiated by the UTRAN described in said figure could be seen as somewhat faster than the sequence in Figure 3. However, since the UTRAN has all the knowledge about downlink buffers for this UE and already knows when it sends the Paging message type 1 that the UE must be moved to the DCH_CELL state, there is no need to have the UE trip via the state C_FIL_FACH before continuing the transition to the CELL_DCH state. Carrying out the Cell update procedure in the CELL_FACH state (steps 2 and 3 in Figure 5) takes a substantial amount of time since the messages are transmitted in competition based on the common channels used by several users. By removing these steps in the CELL_FACH state, the sequence would therefore be made even faster if the UE transits directly from C_CULLE / URA_PCH to CCH_DCH. This fastest sequence is currently not supported in the 3GPP specifications. BRIEF DESCRIPTION OF THE INVENTION Therefore, the objective problem of the present invention is to achieve methods and arrangements for reducing the time delay at the start of a data transfer. The objective problem is solved by the methods having the features of claims 1, 9 and 17. The problem is also solved by a radio network controller having the characteristics of claims 34 and 49 and by a User Equipment having the features of claims 18 and 33.

The method in the UE according to the present invention, comprising the steps of entering the delay reduction information in a message initiating the transfer of * data by the UE, transmitting the start message of the data transfer, receiving a message from the RCN comprising the information for transferring the UE from the URA state PCH or CELL PCH directly to the DCH CELL state by means of the delay reduction information in the data transfer start message, makes it possible to provide a reduction of the delay at the start of a data transfer. The method in the RNC according to the present invention, comprising the steps of entering the time delay reduction information into a data transfer start message by the RNC, transmitting the data transfer start message by the RNC, transmitting an additional message from the RNC comprising the information for transferring the UE from the URA PCH state or the PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer start message, makes it possible to provide a reduction of the delay at the start of a data transfer.

The method in the RNC according to the present invention, comprising the steps of transmitting a cell update confirmation message in a direct access channel, FACH, and transferring the UE from the URA PCH state or the PCH CELL state directly to the DCH CELL state, makes it possible to provide a delay reduction at the start of a data transfer. The RNC according to the present invention, comprising means for entering a delay reduction information in the data transfer start message and means for transferring the UE from the URA PCH state or the PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer start message makes it possible to provide a reduction in the delay at the start of a data transfer. The RNC according to the present invention, comprising means for transmitting a cell update confirmation message in a Direct Access Channel, FACH, and means for transferring the UE from the PCH UPA state or the PCH CELL state directly to the CELL state DCH, makes it possible to provide a reduction of the delay at the start of a data transfer.

The UE according to the present invention, comprising means for inputting the delay reduction information into a data transfer start message, a transmitter for transmitting the data transfer start message, a receiver for receiving a message from the RNC (102) comprising the information for transferring the UE (108) from the URA PCH state or the PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer start message, makes possible to provide a reduction of the delay at the start of a data transfer. The UE according to the present invention, comprising means for receiving a cell update confirmation message in a Direct Access Channel, FACH, for transferring the UE from the URA PCH state or the PCH CELL state directly to the DCH CELL state, makes it possible to provide a reduction of the delay at the start of a data transfer. Preferred embodiments are defined by the dependent claims. Other objects, advantages and new features of the invention will become apparent from the detailed description of the invention when considered in conjunction with the accompanying drawings and the claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 schematically shows a UMTS network. Figure 2 shows a signaling sequence to move the UE from CELL / URA_PCH to CELL_DCH in the case of a transmission initiated by the UE according to the prior art. Figure 3 shows a normal signaling sequence for moving a UE from CELL / URA_PCH to CD_CELL in the case of a transmission initiated by the UTRAN. Figure 4 shows an alternative signaling sequence for moving a UE from the CELL / URA_PCH to the DCH_CELL in the case of a transmission initiated by the UE. Figure 5 shows an alternative signaling sequence for moving the UE from CELL / URA_PCH to CD_CELL in the case of a transmission initiated by the UTRAN. Figure 6 shows an improved signaling sequence for moving a UE from CELL / URA_PCH to CD_CELL in the case of a transmission initiated by the UTRAN. Figure 7 shows an improved signaling sequence for moving a UE from CELL / URA_PCH to CD_CELL in the case of a transmission initiated by the UTRAN with the pre-configuration of the physical channel configuration to be used in the DCH. DESCRIPTION OF THE INVENTION The methods and arrays of the present invention can be implemented in a UMTS network as shown in Figure 1. A radio network controller (RNC) 102 can be connected to a UMTS network and to a plurality of computers. of Users (UEs) 108 where the UEs are able to be in the URA PCH states, CELL, PCH, CELL FACH or CELL DCH. The object of the present invention to reduce the delay at the start of a data transfer is achieved by transferring the UE from the URA PCH or PCH CELL state directly to the DCH CELL state. What is achieved by a transmission of a 'data transfer start message from the unit, ie the UE or the RNC in the UTRAN, which initiates the data transfer. The data transfer start message comprises the delay reduction information that is used for the UE transition from the URA PCH or PCH CELL state directly to the DCH CELL state. Therefore, the RNC comprises in accordance with the present invention means for handling a data transfer start message and means for entering a delay reduction information at the start of data transfer. The RNC further comprises means for transferring the UE from the URA PCH or PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer initiation message. Accordingly, the UE comprises in accordance with the present invention, means for handling a data transfer initiation message and means for entering the data delay information in a data transfer initiation message. The UE comprises a transmitter for transmitting the data transfer start message and a receiver for receiving a message from the RNC 102 comprising the information for transferring the UE 108 from the URA PCH or PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer start message. Data transfer initiated by the UE According to one embodiment of the present invention, the data transfer initiation message is an Update message of the uplink cell transmitted by the UE. It is known that the message of Update of the Cell can be extended with a measurement of traffic volume. However, due to the limitations on the air interface and the fact that the Cell update is transmitted in the transparent RLC mode it is not desirable to extend the size of the message to the extent that it would be necessary. One solution to the problem described above is to modify the Cell Update message in a mode that provides certain delay reduction information on the traffic volume without significantly increasing the size of the message. The general idea is that instead of explicitly indicating the Traffic Volume, this is indicated in relation to a threshold, for example, if the Traffic Volume is above a previously configured threshold. This threshold can be configurable by the UTRAN. Normally the traffic volume measurements in the UE are configured in such a way that the measurement reports in CÉLULA_FACH are transmitted if the traffic volume exceeds a threshold and the same value used to activate the transmission of a traffic report is potentially used. Measurement could be used to set the flag in the Cell update message. This method would mean that the downlink signaling would not need to be changed. However, the threshold for the Cell Update message can also be set separately. In addition to the Traffic Volume information, it may be beneficial to further indicate the delay reduction information, for example, if the uplink data is available in a user radio bearer or a signaling radio bearer. This is also indicated in the cell update message according to a modality. The benefit with this additional information would be that the UTRAN can choose not to move the UEs to CD_CELL if the data comes from a signaling radio bearer since the transmission in the signaling radio bearers is not expected to be extended in time. To reduce the configuration time of the DCH for CELL_PCH and URA_PCH it is an object of the present invention to be able to perform a direct switch to CELL_DCH. To facilitate direct switching, the present invention proposes to modify the format of the UPDATE CELL message to indicate, for example, whether the UE has a traffic volume above a configured threshold, which preferably is the same as the threshold for the activation of the volume measurement of traffic. Since this would imply a significant increase in the size of an upgraded CELULUS_CALL message with the information about the available UL Traffic Volume in such a way that it would no longer fit in an RLC PDU, an alternative is to indicate with a flag whether the volume of traffic is, for example, above the volume of traffic threshold configured for the measurement of traffic volume. This information is considered sufficient to assist the UTRAN in deciding whether a UE should be moved to CD_CELL or not and could facilitate the direct transfer to CELL_DCH of CELL / URA_PCH. The following describes by means of non-limiting examples, two conceivable embodiments for indicating said information. In one embodiment of the present invention, the delay reduction information is indicated as an extension of the Cell Update message. The Cell Update message is extended with a flag or flag, for example, a single bit indicating the relationship with a threshold value, for example, if the volume in the UE is above a threshold. Potentially a second bit is used to be able to separate if the volume of traffic is available in an SRB or an RB (or both). This would extend the message size with a few bits including those necessary for encoding the message extension. Another embodiment of the present invention uses currently reserved Code points. In the current cell update message there are some spare values, that is, the code points that are not currently in use but can be transmitted with the encoding of the existing message. Therefore, a possible mode of the present invention would be to use one of the reserved code points in the Cell Update message to indicate the Traffic volume, for example, if the Traffic Volume is above the threshold. Potentially, up to several code points are used to separate if the volume of traffic is available in an SRB or an RB (or both). For example, a code point I could indicate a Traffic Volume above the threshold in a RB, a code point II could indicate a Traffic Volume above the threshold in a SRB and a code point II could indicate a Volume of Traffic above the threshold in both the SRB and the RB. This method would not increase the message size at all. The method according to the present invention makes it possible to quickly move the user equipment to CELL_DCH in case the volume of traffic is large and move the user equipment to CELL_FACH in case the volume of traffic is small. The method facilitates the direct transition to DCH, which significantly reduces the configuration time of the DCH. The method can thus greatly improve the efficiency for applications where the UE is typically at CELL__CRA_CHIT when the data needs to be transmitted, for example, web browsing. Data transfer initiated by the UTRAN When a transition initiated by the UTRAN is carried out from CELL_PCH / URA_PCH to CELL_DCH the UE transits directly to CELL_DCH without exchanging messages in the intermediate CELL_FACH state according to the present invention. Therefore, the transition CELL_COLL / URA_PCH to CELL_DCH is made faster since the search or paging message contains the configuration of the DCH according to a further embodiment of the present invention. This results in a signaling sequence as shown in Figure 6. In this mode, the UTRAN commands the UE to CD_CELL already in the data transfer start message. The type 1 paging message in step 1. The UE responds with a Complete Radio Bearer Reconfiguration message in step 2 and can then begin to receive the data in the DCH. To make this solution possible, you need to add a number of information elements to the search or pagination type 1 message., the content that is present in the confirmation of cell update in figure 5 can be beneficial to help the search or paging message. Also in comparison to the content of the cell update confirmation, the identity used in the type 1 paging message is U-RNTI and not C-RNTI. Examples of the delay reduction information in the data transfer start message, the type 1 paging message according to this embodiment of the invention are: Configuration parameters of the physical and transport channel, code assignment and configuration of the radio bearer, such as the Frequency, the UL DPCH information (for example, the scrambling code, the spreading factor, the TFCI configuration), the DL DPCH information (eg, spreading factor, speed matching, power imbalances), DL RL information (eg, primary CDICH) power control configurations and potential HS-DSCH configurations. Some other information related to the RB and the Transport channels can also be beneficial, but since the type 1 paging message is sent in Transparent mode and without segmentation or retransmissions, the size needs to be limited, only the crucial information has been listed here. It could be noted that normally the cell where the UE is located is not known when the UE is in the URA_PCH state, so the invention is of limited use for this scenario. This is due to the need of the UTRAN to know when to send the paging message in whose cell the UE is located, so as not to establish a dedicated channel for the UE in all the cells belonging to URA. This could be done of course but it would potentially mean the waste of radio resources. Therefore the invention is beneficial in particular for CELL_CHP UEs. For the URA-PCHs UEs there is a benefit in case the UE has materialized its presence in a cell known to the UTRAN rather recently. The following describes by means of non-limiting examples, two conceivable embodiments for indicating the delay reduction information in an extension of the search or paging message of type 1: Explicit indication: The type 1 paging message is extended with the necessary explicit information to carry out the direct transition to CELL_DCH. Implicit Indication: To save space in the type 1 paging message, a previously transmitted downlink message (e.g., a RB Reconfiguration message) that moves the UE to PIC_CELL / URA_PCH comprises the delay reduction information, i.e., all or part of the configurations necessary to carry out the direct transition to CÉLULA__DCH at a later stage. The type 1 paging message itself, which can be sent much later, and then only comprises the current code that would be used by the UE and / or a pointer for the physical channel configuration already sent.

As an alternative to extending the paging message with the information of the DCH, the Cell Update Confirmation message is modified to be transmitted in the paging channel (step 1 in Figure 5) instead of the FACH. The method makes it possible to quickly move the UEs to CD_CELL when the volume of traffic is large. The method facilitates the direct transition to the DCH, which significantly reduces the configuration time of the DCH. The method can greatly improve the efficiency for applications where the UE is typically in CUL_PCH / URA_PCH when the data needs to be transmitted to the UE (for example, in the Press to Speak services). Therefore, the RNC according to the invention comprises means for transmitting a search or paging message in a paging channel, the PCH, to the UE and means for receiving a cell update message from the UE. The RNC further comprises means for transmitting a cell update confirmation message in a Direct Access Channel, FACH, and means for transferring the UE from the URA PCH or PCH CELL state directly to the DCH CELL state. Accordingly, the UE comprises means for receiving a paging message in a paging channel, PCH, from the RNC and means for transmitting a cell update message to the RNC. The UE comprises means for receiving a cell update confirmation message in a Direct Access Channel, FACH, and means for transferring the UE from the PCH UPA or PCH CELL state directly to the DCH CELL state. In the drawings and specification, typical preferred embodiments of the invention have been described and, although specific terms are employed, they are used only in a generic and descriptive sense and not for purposes of limitation, the scope of the invention is set forth in the following claims.

Claims (49)

1. CLAIMS 1. A method in a user equipment, UE, to initiate a data transfer from. the UE in a UMTS terrestrial radio access network, UTRAN, wherein the UTRAN comprises at least one radio network controller, RNC, which can be connected to the UE which may be in the URA PCH, CELL CELL or DCH CELL states. , characterized in that, the method comprises the steps of: -introducing the delay reduction information in a data transfer start message by the UE, -transmitting the data transfer start message by the UE, -receiving a message from the RNC comprising the information for transferring the UE from the URA PCH or PCH CELL state directly to the DCH CELL state by means of the delay reduction information in the data transfer start message. The method according to claim 1, characterized in that, the data transfer start message is an uplink cell update message transmitted by a UE. The method according to any one of claims 1-2, characterized in that, the delay reduction information comprises information if the traffic volume of the data to be transmitted is above a pre-configured threshold. The method according to claim 3, characterized in that, the delay reduction information further comprises the information with respect to whether the data to be transmitted is available in a user bearer or in a signaling bearer. 5. The method according to any of claims 2-4, characterized in that, the delay reduction information is indicated in an extension of the cell update message. 6. The method according to claim 5, characterized in that the extension comprises at least one dedicated flag. The method according to any one of claims 2-4, characterized in that, the extension comprises the currently reserved code points, i.e., the spare values in the existing cell update message. The method according to any one of claims 2-7, characterized in that, the step of receiving a message from the RNC comprises the additional step of: -receiving a cell update confirmation message from the RNC, and -transmitting a complete configuration message from the radio bearer to the RNC. 9. A method in a radio network controller, RNC, for initiating a data transfer from the RNC in a UMTS terrestrial radio access network, UTRAN, wherein the UTRAN comprises at least the RNC that can be connected to a user equipment, UE, which is capable of being in the URA states PCH, CELL, PCH, or DCH CELL, characterized in that, the method comprises the steps of: - introducing the delay reduction information into a transfer initiation message of data by the RNC. -transmit the data transfer start message by the RNC, -transmit an additional message from the RNC comprising the information to transfer the UE from the URA state PCH or CELL PCH directly to the DCH CELL state, by means of the information of reduction of the delay in the message of beginning of data transfer. The method according to claim 9, characterized in that, the data transfer start message is a downlink paging message transmitted by the UTRAN. The method according to any of claims 9-10, characterized in that, the delay reduction information comprises some of the information parameters: configuration parameters of the physical and transport channel, code assignment and configuration of the carrier of radio, and the U-RNTI identity parameter. The method according to claim 11, characterized in that, the delay reduction information further comprises at least one dedicated physical uplink channel, DPCH, related information, information related to the downlink DPCH, information related to the downlink radio link, power control configurations or potential high-speed downlink shared channel configurations, HS- DSCH. The method according to any of claims 11-12, characterized in that it comprises the additional step of: indicating the delay reduction information in an extension of the paging message. The method according to claim 13, characterized in that it comprises the additional step of: indicating the delay reduction information in said extension explicitly. The method according to claim 13, comprising the additional step of: indicating the delay reduction information in said extension by means of a pointer to a previously transmitted downlink message, characterized in that, the downlink message previously transmitted comprises the delay reduction information. 16. The method according to any of claims 10-14, characterized in that, the transfer step comprises the step of: - receiving a complete message of reconfiguration of the radio bearer from the UE. 17. A method in a radio network controller, RNC, for initiating a data transfer from the RNC in a UMTS terrestrial radio access network, UTRAN, wherein the UTRAN comprises at least the RNC that can be connected to a user equipment, UE, which is layers of being in the states URA, PCH, CELL, PCH, or CELL DCH, which comprises the steps of: -transmitting a paging message in a paging channel, PCH, to the UE, -receiving a cell update message from the UE, the method, characterized by, the additional steps of: -transmitting a cell update confirmation message on a direct access channel, and -transfer the UE from the URA PCH or CELL state PCH directly to CELL DCH status. 18. An UE user equipment, which can be connected to a radio network controller, in a UMTS network, where the UE is capable of being in the states, URA PCH, CELL PCH, CELL FACH, or CELL DCH, comprising means for handling a data transfer initiation message, characterized by, means for entering the delay reduction information into a data transfer initiation message, a transmitter for transmitting the data transfer initiation message, a receiver to receive a message from the RNC comprising the information to transfer the UE from the URA state PCH 'or PCH CELL directly to the DCH CELL state by means of the information of delay reduction in the data transfer message. 19. The UE according to claim 18, characterized in that, the data transfer start message is an uplink cell update message transmitted by a UE. 20. The UE according to any of claims 18-19, characterized in that, the delay reduction information comprises information if the traffic volume of the -i. data to be transmitted is above a pre-configured threshold. 21. The UE according to claim 20, characterized in that the delay reduction information further comprises the information as to whether the data to be transmitted is available in a user bearer or in a signaling bearer. 22. The UE according to any of claims 19-21, characterized in that, the delay reduction information is indicated in an extension of the cell update message. 23. The UE according to claim 22, characterized in that the extension comprises at least one dedicated flag. 24. The UE according to any of the claims 19-21, characterized in that, the extension comprises the currently reserved code points, that is, the spare values in the existing cell update message. 25. The UE according to any of claims 19-24, characterized in that, the receiver for receiving a message from the RNC further comprises means for receiving a cell update confirmation message from the RNC, and means for transmitting a message. complete configuration of the radio bearer to the RNC. 26. The UE according to claim 18, characterized in that, the data transfer start message is a downlink paging message transmitted by the RNC. 27. The UE according to any of claims 18, 26, characterized in that, the delay reduction information comprises some of the information parameters: the configuration parameters of the physical and transport channel, code assignment and configuration of the carrier 1 radio, and the identity parameter U-RNTI. The UE according to claim 27, characterized in that, the delay reduction information further comprises at least one dedicated physical uplink channel, DPCH, the related information, the information related to the downlink DPCH, the information related to the downlink radio link, power control configurations or potential high-speed downlink shared channel configurations, HS-DSCH. 29. The UE according to any of the claims 26, characterized in that, the delay reduction information is indicated in an extension of the search or paging message. 30. The UE according to claim 29, characterized in that, the delay reduction information is indicated in the extension explicitly. 31. The UE according to claim 29, characterized in that, the delay reduction information is indicated in the extension by means of a pointer to a previously transmitted downlink message, wherein the previously transmitted downlink message comprises the delay reduction information. 32. The UE according to any of claims 26-31, characterized in that, the transmitter comprises means for transmitting a complete message of re-configuration of the radio bearer from the UE. 33. A user equipment UE, which can be connected to a radio network controller, in a UMTS network, where the UE is capable of being in the states, URA PCH, CELL PCH, CELL FACH, or CELL DCH, comprising means receiving a paging or paging message in a paging channel, PCH, from the RNC, means for transmitting a cell update message to the RNC, characterized in that, the means for receiving a cell update confirmation message in a direct access channel, FACH, and means for transferring the UE from the ÜRA PCH or PCH CELL state directly to the DCH CELL state. 34. A radio network controller, RNC, which can be connected to a UMTS network and to a plurality of user equipment, UEs, wherein the UEs are capable of being in the states, URA PCH, CELL PCH, CELL FACH or DCH CELL, comprising means for handling a data start message, characterized in that, the means for entering a delay reduction information at the start of the data transfer and means for transferring the UE from the URA PCH state or PCH CELL directly to the DCH CELL state by means of the delay reduction information in the data transfer start message. 35. The RNC according to claim 34, characterized in that, the data transfer start message is an uplink cell update message transmitted by a UE. 36. The RNC according to any of claims 34-35, characterized in that, the delay reduction information comprises information if the traffic volume of the data to be transmitted is above a pre-configured threshold. 37. The RNC according to claim 36, characterized in that, the delay reduction information further comprises the information as to whether the data to be transmitted is available in a user carrier or in a signaling bearer. 38. The RNC according to any of claims 35-37, characterized in that, the delay reduction information is indicated in an extension of the cell update message. 39. The RNC according to claim 38, characterized in that the extension comprises at least one dedicated flag. 40. The RNC according to any of the claims 38, characterized in that, the extension comprises the currently reserved code points, that is, the spare values in the existing cell update message. 41. The RNC according to any of claims 34-40, characterized in that, the RNC comprises means for transmitting a cell update confirmation message to the UE, and receiving a complete configuration message of the radio bearer from the UE. 42. The RNC according to claim 34, characterized in that, the data transfer start message is a downlink paging or search message transmitted by the RNC. 43. The RNC according to any of claims 34, 42, characterized in that, the delay reduction information comprises some of the information parameters: the configuration parameters of the physical and transport channel, code assignment and configuration of the carrier radio, and the U-RNTI identity parameter. 44. The RNC according to claim 43, characterized in that, the delay reduction information further comprises at least one dedicated physical uplink channel, DPCH, the related information, the information related to the downlink DPCH, the information related to the downlink radio link, power control configurations or potential high-speed downlink shared channel configurations, HS-DSCH. 45. The RNC according to any of the claims 34, characterized in that it further comprises means for indicating the delay reduction information in an extension of the search or paging message. 46. The RNC according to claim 45, characterized in that it also comprises means for indicating the extension delay reduction information explicitly. 47. The RNC according to claim 42, characterized in that it comprises means for indicating the delay reduction information in the extension by means of a pointer to a previously transmitted downlink message, wherein the downlink message transmitted previously it comprises the delay reduction information. 48. The RNC according to any of claims 42-47, characterized in that it further comprises means for receiving a complete message of re-configuration of the radio bearer from the UE. 49. A radio network controller, RNC, which can be connected to a UMTS network and to a plurality of user equipment, UEs, wherein the UEs are capable of being in the URA states PCH, CELL CELL, FACH CELL and CELL DCH, comprising means for transmitting a paging message in a paging channel, PCH to the UE, means for receiving a cell update message from the UE, characterized in that, the means for transmitting a cell update confirmation message in a direct access channel, FACH, and the means for transferring the UE from the state URA PCH or CELL PCH directly to the CELL DCH state.