RU2394394C2 - Improvement of iub/iur hsdpa/hsupa mobility procedure - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: handover method involves sending a measurement report message from user equipment, having information on neighbouring cells to a service radio network controller, delivering a message with a request for adding a radio line, having an optional information element which identifies the connection frame number for high-speed packet access to data from the said service radio network controller to a base station in response to the said measurement report message, sending a reply message to the request for adding a radio line from the said base station to the said service radio network controller in response to the said message on request for adding a radio line, and sending a message on updating the active set with the said optional information element which identifies the said connection frame number for high-speed packet access to data from the said service radio network controller to the said user equipment in response to the said message with a reply to the request for adding a radio line.

EFFECT: faster change of service cells.

28 cl, 13 dwg

Description

LINK TO RELATED APPLICATIONS

Priority is claimed in accordance with provisional application for US patent No. 60/730,610 of 10/26/2005, provisional application for US patent No. 60/726,320 of 12/10/2005, provisional application for US patent No. 60/719,409 of 09/21/2005 , provisional application for US patent No. 60/710,981 of 08/23/2005

BACKGROUND OF THE INVENTION

1. The technical field

The invention relates to the field of mobile communications and, although it is not limited to, is disclosed in the context of the UTRA (Terrestrial Radio Access) of the 3rd Generation Partnership Project (3GPP), Third Generation Partnership Project ) In this context, the present invention is disclosed as providing mobility for high speed downlink packet access (HSDPA, High Speed Downlink Packet Access) and high speed uplink packet access (HSUPA, High Speed Uplink Packet Access), i.e. to replace a serving cell HS-DSCH / E-DCH, which can currently only be accomplished using the RL Reconfiguration procedure through the interfaces of the Radio Network Subsystem (lub / lur), but the invention is not limited to this particular pecifications environment.

2. The level of technology

The architecture of the packet network of the universal mobile communication system (UMTS) (Fig. 1) includes the main architectural elements in the form of a user device (UE, User Equipment), a terrestrial radio access network of the UMTS system (UTRAN) and a core network (CN, core network). The user device is connected to the UTRAN via the radio interface (Uu), while the UTRAN is connected to the core network via the (wired) lu interface.

Figure 2 shows some additional details of the architecture, in particular the UTRAN. A UTRAN includes multiple radio network subsystems (RNS), each of which contains at least one radio network controller (RNC). Each radio network controller can be connected to many nodes B, which are 3GPP-analogues of GSM base stations (second generation radio access technology (RAT). Each Node B may be in radio communication with a plurality of user devices via the radio interface (Uu) shown in FIG. 1. A given user device may be in radio communication with a plurality of nodes B, even if one or more nodes B are connected to different radio network controllers. For example, the user device 1 in FIG. 2 may have radio communication with the node B 2 of the RNS subsystem 1 and the node B 3 of the RNS subsystem 2, the node B 2 and the node B 3 being adjacent nodes B. The radio network controllers of the various RNS subsystems can be connected via an interface lur, which allows mobile user devices to remain in contact with both radio network controllers when moving from a cell belonging to node B of one radio network controller to a cell belonging to node B of another radio network controller. One of the radio network controllers will act as a “serving” or “controlling” radio network controller (SRNC, Serving RNC, or CRNC, Controlling RNC), while the other will act as a “drift” radio network controller (DRNC, Drift RNC). A chain of such drift radio network controllers may come from a predetermined serving SRNC. A plurality of nodes B are usually neighboring nodes B in the sense that each of them controls neighboring cells. Mobile user devices are able to cross neighboring cells without having to re-establish a connection with a new node B, since either nodes B are connected to the same radio network controller, or if they are connected to different radio network controllers, these radio network controllers are connected to each other. During such movements of the user device, the addition and removal of radio links is sometimes required so that the user device can always support at least one radio link with the UTRAN. This is called soft handoff or soft handover (SHO).

The handover function is based on radio signal measurements and is used to maintain the quality of service required by the core network. The handover strategy used by the network to control the radio link determines the handover decision based on the measurement results reported by the user device / RNC and a diverse set of parameters for each cell. Network-controlled handover may also occur for reasons other than radio link management, for example, to control the distribution of traffic between cells. The network operator determines the exact handover strategies, but possible types include 3G-3G handover, FDD softer / softer, FDD inter-frequency hard handover, FDD / TDD handover, TDD / FDD handover, TDD / TDD handover, 3G-2G handover and vice versa There are many reasons for initiating a handover process, including uplink quality, uplink signal measurement, downlink quality, downlink signal measurement, distance, service change, best cell, intervention due to maintenance, directional repeat, traffic, priority interruption of communication, etc.

As for soft handover, it is described in 3G TR 25.922 v.3.1.0 (2000-03) in Chapter 5.1.4. In this document, a soft handover is described as a handover in which a mobile station establishes a connection with a new node B at the same carrier frequency or in a sector of the same node (softer handover), performing, at most, a code change. With respect to soft handover, an “active set" is defined as a set of nodes B with which a user device is simultaneously connected, that is, the UTRA cells currently assigning a DPCH downstream to the user device are the active set. The soft handover procedure consists of a number of separate functions: (1) measurement, (2) filtering the measurement results, (3) a report on the measurement results, (4) the soft handover algorithm, and (5) handover.

Measurement results of controlled cells, filtered by a suitable method, trigger report transfer events, which comprise the main input data for the soft handover algorithm. The definition of "active set", "controlled set", and a description of all reporting events are given in TS 25.331, V6.6.0 (2005-06) "Radio Resource Management (RRC); Protocol Specification (Version 6)" ("Radio Resource Control (RRC); Protocol Specification (Release 6) "). Based on the measurement results in the set of monitored cells, the soft handover function evaluates whether to add any node B in the active set to add (add radio links), delete (delete radio links) or replace (combined add and remove radio links); and then performs a procedure known as "updating the active set." An example of a soft handover algorithm, as well as its implementation, is described in chapters 5.1.4.2 and 5.1.4.3 of 3G TR 25.922, as well as in Appendix C of this document, which shows a block diagram of the soft handover algorithm.

3GPP TS 25.303 v.4.0.0 (2001-03) of FIG. 30 shows the addition of a radio link for the FDD mode. As suggested above, the addition of a radio link starts at the Radio Resource Control (RRC) level in accordance with the measurement reports sent by the user device. RRC Network Management first configures a new radio link at the physical layer. Transmission and reception begin immediately. Then, the RRC network management arranges for the sending of an RRC message about updating the active set to the RRC user device. The RRC user device configures layer 1 to begin receiving. After confirmation from the physical layer in the user device, a message is sent to complete the update of the active set in the radio network controller RNC-RRC.

As part of the 3GPP partnership project, the addition of a shared channel has been agreed, i.e. the so-called concept of High Speed Downlink Packet Access (HSDPA) for the UTRAN of the Universal Mobile Communications System (UMTS), see document 3GPP TS 25.308 v. 6.3.0 (2004-12). The main idea of HSDPA is to use a shared high-speed downlink (transport) channel (called HS-DSCH, high speed downlink shared channel, high-speed downlink shared channel) to transmit packet data to the user device. As with the conventional DSCH, each user device to which data can be transmitted on the HS-DSCH has an associated dedicated physical channel (DPCH). The DPCH is used to carry power control commands for the associated uplink and, if required, for other services, such as circuit-switched voice. The HS-DSCH provides a higher data rate and faster relay mechanism, namely the Hybrid Automatic Repeat Request (HARQ) mechanism provided by Node B. In versions of Preview 5, the only official shared channel in the 3GPP standard in the downstream direction there was a DSCH channel, for which the retransmission should always be ensured by radio link control (RLC, Radio Link Control) in the RTR controller of the UTRAN network, which was relatively slow nny retransmission mechanism. However, starting from version 5, the DSCH channel has been removed from the specifications due to the lack of need for it. A similar dedicated channel (E-DCH) has been approved for High Speed Uplink Packet Access (HSUPA). A similar improvement is provided for the uplink in 3GPP TS 25.309 v. 6.3.0 (2005-06) "FDD Enhanced Uplink; General Description; Stage 2 (Version 6)" ("FDD Enhanced Uplink; Overall description; Stage 2 (Release 6)"). Mobility procedures for the HS-DSCH and specific scenarios for the E-DCH are discussed in sections 7.10 and 7.20 of the 3GPP document respectively: "RAN Technical Specifications Group; TR 25.931 v. 6.2.0 (2005-06); UTRAN Functions, Examples of Procedures Signaling (version 6) "(" Technical Specification Group RAN; TR 25.931 v. 6.2.0 (2005-06); UTRAN functions, examples on signaling procedures (Release 6) "). The details of the “Active Set Update (ASU) using the HS-DSCH” have been described in pending U.S. Patent Application No. 60 / 614,562 of 09/29/2004 (currently U.S. Patent Application No. 11 / 237,643, which is incorporated herein by reference).

In RAN2, document R2-042103 (in RAN2 # 44) considered an improvement in replacing an HS-DSCH serving cell when there is a simultaneous need to update an active set. Then, in RAN2, document R2-050115 (in RAN2 # 45bis) considered the proposal to include improvements in the radio resource management specification RAN2, and in document R2-051203 (in RAN2 # 46bis), a request for modification (CR) of the RRC specification was agreed.

The purpose of the improvement is that when it becomes necessary to update the active set (ASU) and replace the HS-DSCH serving cell at the same time, the SRNC can avoid two separate procedures: updating the active set and, for example, reconfiguring the physical channel for the user device. This could lead to a service interruption due to a concurrent procedure rule prohibiting concurrent concurrent procedures.

RAN2 recognized the importance of the enhancement and agreed to include the HS-DSCH serving cell replacement feature in the update procedures of the active radio resource control (RRC) set. This will provide faster updating of the active set and replacement of the serving HS-DSCH cell, which means a shorter transmission interval or avoids the indicated interruption altogether.

To replace the serving cell and add / remove a line according to the current specifications, three RNSAP / NBAP procedures must be performed (add / remove radio links, synchronized reconfiguration of the radio link and completion of reconfiguration of the radio link).

SUMMARY OF THE INVENTION

An object of the present invention is to take into account in signaling a radio network subsystem that updating an active set and replacing a serving HS-DSCH / E-DCH cell can occur simultaneously, which means that improvements can also be made to NBAP specifications ( 3GPP TS 25.433 v. 6.6.0 (2005-06) "UTRAN lub interface Node In Application Part (NBAP) signalling") and RNSAP (3GPP TS 25.423 v. 6.6.0 (2005-06) "UTRAN lur interface RNSAP signalling" )

Therefore, the procedures for adding a radio link and deleting a radio link must be updated so that the application part of the Node B (NBAP, Node B Application Part) and the application part of the radio network subsystem (RNSAP, Radio Network Subsystem Application Part) are consistent with the radio resource management (RRC), and furthermore, these enhancements contribute to even faster updating of the active set and replacement of the HS-DSCH / E-DCH serving cell.

The present invention presents the necessary improvements and proposes that the NBAP and RNSAP application parts are compatible with the RRC specification, so that simultaneous updating of the active set and replacement of the HS-DSCH / E-DCH serving cell can be even faster.

Benefits include the following.

- Improved HSDPA / HSUPA mobility performance by reducing the number of procedures while simultaneously starting the replacement of the HS-DSCH / E-DCH serving cell in the radio network controller and the state of adding a radio link / deleting a radio link.

- There is no delay in adding a radio link / replacing a serving cell of the HS-DSCH / E-DCH.

- The proposed solution does not require a new procedure and communication.

Disadvantages:

- introduces another option to perform replacement of the HS-DSCH / E-DCH serving cell when a state of adding a radio link / deleting a radio link is simultaneously initiated.

Thus, the invention relates to mobility for high-speed downlink packet access (HSDPA) and high-speed uplink packet access (HSUPA) and the fact that the replacement of the HS-DSCH / E-DCH serving cell is currently only possible using Radio link reconfiguration procedures in lub / lur.

The replacement of the HS-DSCH serving cell can be classified according to two different cases: the replacement of the HS-DSCH serving cell inside Node B (Intra-Node B) and the replacement of the HS-DSCH serving cell between Node B (Inter-Node B), which are defined as follows way (note that other possible scenarios are replacing HS-DSCH serving cells within / between DRNS, but they are not presented separately, since they are similar to replacing an HS-DSCH serving cell inside node B / between nodes B).

Replacing the HS-DSCH serving cell inside Node B

If the old HS-DSCH serving cell and the new HS-DSCH serving cell are in the same Node B, then replacing the serving cell can be called replacing the HS-DSCH serving cell within Node B. In this case, it is not necessary to deliver HSDPA information to node B, and there is also no need to establish a new transport channel to node B.

HS-DSCH serving cell replacement between nodes B

If the old HS-DSCH serving cell and the new HS-DSCH serving cell are in different nodes B, then replacing the serving cell can be called replacing the HS-DSCH serving cell between nodes B. In this case, the new node B does not have HSDPA information, and it must be provided. Also, the new node B does not yet have a transport channel, and therefore it must be installed.

The current state of HSDPA mobility in the 3GPP RAN3 standard for cases of replacing a serving HS-DSCH cell within a node B and replacing a serving HS-DSCH cell between nodes B is as follows.

Procedure for adding a radio link

It was agreed that the addition of a radio link has not been used to replace the serving cell since the beginning of 2002.

This agreement appears to be based on the following arguments (from chapter 2.3 of document R3-020187: HS-DSCH mobility procedures).

Comparison of one-step and two-step procedures

When a radio link is added to the active set, it is unlikely that the indicated added cell immediately becomes the single most suitable cell for the HS-DSCH service. Therefore, the installation of a new radio link in conjunction with the direct replacement of the HS-DSCH serving cell for this new line is probably not necessary. Section 3.4 provides an example of a two-step procedure, which consists of adding the radio link in the first step and replacing the HS-DSCH serving cell in the second step. The direct installation of the HS-DSCH when adding a radio link can only be added if it is justified by a clear improvement in performance.

The question arises whether this principle of using the two-step procedure is also suitable in the case of hard handover (for example, inter-frequency handover). Section 3.3 provides an example of a hard handover for a user device with HS-DSCH channel assignment. In this case, it is sufficient to use the two-step procedure only in NBAP / RNSAP signaling, when in the first step the new radio link sets the target node B, and in the second step, the synchronized replacement of the HS-DSCH serving cell is prepared. This example applies to existing NBAP / RNSAP procedures. Consideration should be given to optimizing NBAP / RNSAP signaling.

However, at the radio interface, a hard handover can be performed using only one RRC procedure. This example applies already to version 99, when a hard handover is performed for a user device with a DSCH channel assignment.

Although the above rationale claims that the new cell when replacing the HS-DSCH serving cell is the same cell to be added, the essence of the proposal in the present invention is to allow other existing cells in the Node B to become the new HS-channel serving cell DSCH.

Also, when installing a radio line, we can install, for example, two radio lines, and the radio network controller must choose which line is best for the HS-DSCH serving cell, and the same mechanism can also be applied to adding a radio line, especially for hard handover inside node B which is carried out with the addition of a radio link.

Thus, based on the above justifications and arguments described in Chapter 2 (regardless of previous 3GPP decisions), it was proposed that the addition of the radio link should also be improved to include information on the HS-DSCH serving cell.

For the case of replacement of a serving HS-DSCH cell between nodes B

It is also proposed that the addition of a radio link be improved to include the HS-DSCH Information element. This addition replaces the HS-DSCH serving cell between nodes B in the case where the new HS-DSCH serving cell is in another node B for which there is already one existing radio link. Currently, the replacement of the HS-DSCH serving cell with the simultaneous addition of a radio link needs to be done using separate procedures for adding a radio link and reconfiguring the radio link.

Radio link removal procedure

There was no discussion of the use of radio link removal to replace a serving cell.

At a meeting of RAN * 28 group on 3GPP technical specifications, RRC (TS 25.331) CR No. 2564 was approved (title: Including HS-DSCH serving cell replacement in the active set update (Including HS-DSCH serving cell change in ASU)), (CR for RP-050320). A proposal according to this CR improves HSDPA mobility performance by making it possible to perform a serving cell replacement using an active set update procedure.

Note that the same argument can be applied to replacing an E-DCH serving cell, where it is not possible to replace the HSUPA serving cell by adding radio link and deleting radio link procedures.

In the case of replacing the HS-DSCH serving cell between nodes B, it has also been proposed to improve the procedure for removing the radio link so that it includes the use of the HS-DSCH Information element. This addition replaces the HS-DSCH serving cell between Node Bs when the new HS-DSCH serving cell is in another Node B having at least one radio link to be deleted. Currently, the replacement of the HS-DSCH serving cell with the simultaneous removal of the radio link should be done through separate procedures for removing the radio link and reconfiguring the radio link.

As mentioned above, in order to replace the serving cell and add / remove a line within the framework of this specification, it is necessary to perform three RNSAP / NBAP procedures (add / remove radio links, synchronized reconfiguration of the radio link and complete reconfiguration of the radio link).

The present invention provides a lub / lur signaling solution (NBAP / RNSAP) for a radio link adding procedure combined with a replacement HS-DSCH and E-DCH serving cell, and also according to the present invention, a radio link removal can be combined with a HS-DSCH / serving cell E-DCH, when there is a need to replace the HS-DSCH / E-DCH serving cell and one of the two above-mentioned procedures occurs at the same time in the radio network controller.

Combining the replacement of the HS-DSCH / E-DCH serving cell with the procedures for adding a radio link and removing a radio link allows the radio network controller to avoid the use of synchronized (unsynchronized) radio link reconfiguration and termination procedures, and thus signaling in the lub / lur interfaces becomes more efficient.

The present invention is also useful for replacing an E-DCH serving cell with the addition of a radio link, and also allows the installation of an E-DCH with / without replacing a serving cell in a B / DRNS.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows the architecture of a packet network universal mobile communications system (UMTS), including the main architectural elements in the form of a user device (UE), terrestrial radio access network UMTS (UTRAN) and core network (CN).

Figure 2 shows some additional details of the architecture depicted in figure 1, in particular the UTRAN.

Figure 3 shows both the known procedure and the improved procedure in accordance with the invention, designed to support the replacement of the serving HSDPA cell and the addition of a radio link.

Figure 4 shows both a known and an improved procedure in accordance with the present invention, designed to support the replacement of the serving cell HSDPA and the removal of the radio link.

5 shows a radio network subsystem (RNS) including a serving radio network controller (SRNC) connected to a Node B, which, in turn, is connected to a user device via a radio interface.

6A and 6B collectively illustrate information elements used in a radio link request message or in a radio link request message when new information elements according to the present invention are added.

7A and 7B collectively show information elements used in a radio link addition response message, a radio link addition failure message, or a radio link removal request message when new information elements according to the present invention are added.

FIG. 8 is a flowchart illustrating a series of procedural steps that may take place in a network element, such as a serving radio network controller in FIGS. 3 or 4.

FIG. 9 shows one embodiment of a processor for processing signals used in a serving radio network controller (SRNC), a Node B, or a user equipment (UE) in FIG. 5.

10 shows a procedure for execution in a user device.

Figure 11 shows the procedure for execution in a network element, such as a node, shown in figure 3-5.

DETAILED DESCRIPTION OF THE INVENTION

Although the invention has been specifically disclosed for 3GPP and HSDPA / HSUPA, it should be understood that the present invention is not limited to HSDPA / HSUPA access or 3GPP standard and is generally applicable to all types of wireless communications.

According to the present invention, the procedures for adding a radio link and removing a radio link or their functional equivalents can be optimized in the specifications of version 6 (Rel-6) in order to take into account that it may be necessary to simultaneously update the active set and replace the serving cell HS-DSCH / E- Dch. Therefore, the following describes how to improve radio link control procedures, procedures for adding a radio link and removing a radio link.

3 and 4, on the left, the currently used procedures are shown, and on the right, the proposed improvement, the time savings achieved in accordance with the present invention are clearly illustrated.

Adding a radio link (see figure 3)

The problem is that when the criteria for deleting a radio link or adding a radio link are triggered in the radio network controller while replacing the HS-DSCH / E-DCH serving cell, the radio network controller cannot replace the HS-DSCH / E-DCH serving cell simultaneously with one of of the two above-mentioned procedures for adding a radio link or removing a radio link, but should instead replace the HS-DSCH / E-DCH serving cell with a separate radio link reconfiguration procedure having a different time position, i.e., not simultaneously and in parallel.

The rule of parallel procedures prohibits the simultaneous execution of procedures for adding a radio line and reconfiguring a radio line, which degrades performance. The radio line deletion procedure can be started at any time, but as soon as the deletion of the radio line is started, the radio network controller must wait for its completion, after which it will be possible to initiate the reconfiguration of the radio line.

Thus, as shown, for example, on the left in FIG. 3, when it is simultaneously necessary to add a radio link and replace a serving HS-DSCH cell in a RAN according to Rel-5, the serving radio network controller (SRNC) has to perform two separate procedures like as is the case in RRC according to Rel-5. In lub / lur, the SRNC first initiates the radio link addition procedure in order to add one radio link to node B, and immediately after the radio line reconfiguration procedures (preparation of the radio line reconfiguration and completion of the radio line reconfiguration / unsynchronized radio line reconfiguration), it replaces the HS-DSCH serving cell. The procedure should be as mentioned above if the added radio link is the serving cell of the HS-DSCH; otherwise, reconfiguration of the radio link may be performed first. From the point of view of radio resource control signaling, the order of NBAP / RNSAP procedures does not matter, because ultimately it is necessary that the radio link is added and the serving cell of the HS-DSCH is configured before the SRNC can also initiate the shown Radio Resource Management: Active Set Update ( RRC: Active Set Update). If the radio network controller had to first initiate the replacement of the serving cell using the radio line reconfiguration procedure, then the communication context of the node B would be in a state prepared for reconfiguration and the radio line adding procedure could not be started. Thus, the procedure for adding a radio link is delayed, and the characteristics of the soft sum coefficient deteriorate. Also, from the point of view of the NBAP specification, the Node B may reject the procedure for adding a radio link until the CFN reconfiguration is completed, and thus, this coefficient may decrease even further depending on the implementation.

If the radio network controller first initiates the addition of the radio link, the replacement of the serving cell using the radio link reconfiguration procedure is delayed until the completion of the addition of the radio link.

To improve HSDPA mobility and HSUPA mobility, the present invention provides a signaling solution that enables replacement of a serving cell at the same time as adding / removing a line. This solution requires the introduction of Information Elements (IE, Information Element) in the RNSAP / NBAP RADIO LINK REQUEST / RESPONSE / FAILURE message and the RADIO LINE REMOVE / REQUEST / RESPONSE messages, such as the bold information elements in Figures 6A, 6B, 7A and 7B shown just as an example. Such new information elements can be added to the functional message definitions and content described in the Elements for NBAP communication section in Section 9.1 of 3GPP TS 25.433 v. 6.6.0 (2005-06), for example, for the subsections noted in FIGS. 6A, 6B, 7A and 7B.

6A and 6B, for the procedure of adding a radio link with a replacement of a serving cell, the message 600 REQUEST FOR ADDING A RADIO LINE can be expanded, for example, by the group of information elements shown 602 containing one or more information sub-elements shown. Thus, for the case of the procedure of adding a radio link with replacing the serving cell of the HS-DSCH, the message 600 REQUEST FOR ADDING A RADIO LINE is changed so that it includes one or more of the following elements:

- identifier of the radio link HS-DSCH,

- time information element (example for the name of the information element - HSDPA CFN), indicating when the node begins to transmit HS-DSCH data on the newly added radio line,

- temporary radio network identifier (RNTI) HS-DSCH (HS-DSCH RNTI),

- information element Indicator of the requested transport channel, Address of the transport layer and the identifier of the binding (on the MAC-d stream of the HS-DSCH channel).

Note that, among other things, information sub-elements may belong, for example, to the same group of information elements (an example of a group of information elements is HS-DSCH serving cell replacement information), which can be used to replace the HS-DSCH serving cell,

- for the case of replacing the serving HS-DSCH cell between nodes B, the information element HS-DSCH, the radio link identifier HS-DSCH, the temporary radio network identifier HS-DSCH (HS-DSCH RNTI) and the HSDPA connection frame number (HSDPA CFN, HSDPA Connection) are also included Frame Number).

The reason why the CFN connection frame number is added as an information element in REQUEST FOR ADDING A RADIO LINE is due to “MAC-hs reservation”. If the message does not have this CFN time information element, then the Node B, which supports MAC-hs redundancy, will start sending HS-DSCH data (which are in the Node B's buffer) via the newly added radio link as soon as the Node B replies with the RESPOND TO message ADDING A RADIO LINE, which takes place before the SRNC performs the update procedure of the active set in the user device. Therefore, the user device will not be able to receive any data from the newly added radio link, even if the node sends data, that is, there will be a packet loss over the radio interface. This problem must be avoided. Using the CFN connection frame number, the SRNC can synchronize the time used by the Node B to start sending HS-DSCH data on the newly added radio line with the time that the user device uses to start receiving data on the radio line. It should be noted that the added radio link is configured as soon as the Node B responds with a RADIOLINE ADDITION message 700 (see FIGS. 7A and 7B), similar to the normal specification.

In the RADIO LINK ADD message, as shown in FIGS. 7A and 7B, and in the RADIO LINK FAIL message 702, an information element (Serving Cell Replacement Indicator) may be added to indicate whether the requested replacement of the serving cell was successful / unsuccessful. Information element 704 Response to HS-DSCH information may be added to carry the transport layer address, etc. The MAC-hs reset indicator information sub-element and HS-DSCH RNTI information sub-element can also be added, and these information elements are applicable only to the RNSAP application part and do not exist in the NBAP application part. These three information elements are set when the above information element 704 (Serving Cell Replacement Indicator) notifies success. If the above information element (Serving Cell Replacement Indicator) notifies of a failure, a reason information element may be added to the message indicating the reason for the failure. For the case of replacing a serving HS-DSCH cell between nodes B, HS-DSCH information may also be included.

As discussed above, in an improvement of the present invention for Rel-6, an SRNC may initiate a radio link addition procedure that includes a CFN connection frame number when a replacement HS-DSCH serving cell is activated (CFN indicates when a new HS-DSCH serving cell becomes a serving cell). When a node is configured to add a radio link and replace a new HS-DSCH serving cell, the SRNC may not initiate a radio line reconfiguration (serving cell replacement) procedure, but instead may immediately initiate Radio Resource Management: Updating the Active Set, thereby saving time, as illustrated in figure 3 on the right (compared to the image on the left).

The procedure for adding a radio line with the replacement of the serving cell E-DCH (6B)

- Message 600 REQUEST FOR ADDING A RADIO LINE includes:

- serving radio E-DCH.

- A time information element (for example, the information element name is an E-DCH CFN) indicating when the Node B starts transmitting E-AGCH data on a new serving radio link of the E-DCH.

(Note that the two above information elements may belong to the same information element (an example of the information element name is E-DCH serving cell replacement information), which can be used to replace the E-DCH serving cell.)

- To replace the E-DCH serving cell inside / between nodes B with E-DCH installation (that is, the E-DCH is not configured in node B), the information element E-DCH FDD and the information element E-DPCH information are also included (note that this also makes it possible to install the E-DCH without replacing the serving cell by the procedure of adding a radio link).

- Message 700 ANSWER TO ADDING A RADIO LINE and message 702 FAILING TO ADD A RADIO LINE includes:

- one information element that indicates whether the required replacement of the serving E-DCH cell was successful / unsuccessful, and if the indicator notifies of a successful replacement, FDD E-DCH downlink control channel information for the new serving radio link and the old serving radio link may be included . If the indicator notifies of a failed replacement, the reason information element may be included.

- To replace the E-DCH serving cell within / between nodes B with the E-DCH installation, the Response to E-DCH FDD information element may also be provided.

Removing the radio line (see figure 4)

An improvement of the radio link removal procedure is similar to the above described improvement of the radio link addition procedure, said improvement is illustrated in FIG. 4, the prior art procedure is shown on the left and the proposed improvement on the right.

On a Rel-5 standard radio access network, the SRNC first initiates a (non-synchronized) radio line reconfiguration procedure, as shown on the left, if the current HS-DSCH serving cell has a radio line that needs to be removed. Then, after the reconfiguration of the radio link, the serving cell of the HS-DSCH is replaced, and the SRNC may initiate the deletion procedure of the radio link.

If the radio link you want to remove is not in a cell that is not the current serving cell of the HS-DSCH, the SRNC may also initiate procedures in a different order. In this case, a synchronized radio link reconfiguration procedure may also be used.

The reason for not using synchronized reconfiguration of the radio link in the first case (the radio link that needs to be removed is in the same HS-DSCH serving cell) is because the cell that needs to be deleted is deleted immediately, and when subsequently the HS-DSCH serving cell with the connection frame number (CFN) is replaced, a logical error occurs in the Node B, because there will be a serving HS-DSCH serving cell for which there is no radio link.

In the Rel-5 standard, it is also possible to initiate the deletion of a radio link immediately after a synchronized / unsynchronized reconfiguration of a radio link, since the deletion procedure of a radio link can be initiated at any time and is not limited to the parallel procedure rule. Even if initiation is possible at any time, from the point of view of node B, one procedure is easier to process than two parallel procedures. Therefore, an improvement of the radio link removal procedure has been proposed.

According to the currently used specification, three RNSAP / NBAP procedures (add / remove radio links, synchronized reconfiguration of the radio link and complete reconfiguration of the radio link) must be performed to replace the serving cell and to add / remove a line.

Similarly to the radio link addition described above, illustrated in FIG. 3, a procedure for removing a radio link with replacing a serving cell of both the HS-DSCH and the E-DCH is described.

Message 604 REQUEST FOR REMOVAL OF A RADIO LINE (see FIGS. 6A and 6B) including an identifier of the HS-DSCH radio line that informs about the identity of the HS-DSCH radio line and a time information element (for example, is added to the HS-DSCH serving cell replacement procedure; , an information element called HSDPA CFN), which is used by the Node B to start transmitting HS-DSCH data. The time information element is set only when the radio link to be deleted is different from the current serving radio link of the HS-DSCH. An HS-DSCH Temporary Radio Network Identifier (HS-DSCH RNTI) may also be added. The requested transport channel indicator information element, transport layer address, and link identifier (per MAC-d HS-DSCH stream) can be added. The above information elements may belong to the same group of information elements (an example of an information element name is HS-DSCH serving cell replacement information), which is used to replace the HS-DSCH serving cell. In the event of a replacement HS-DSCH serving cell between nodes B, the information element HS-DSCH, the radio link identifier HS-DSCH, the temporary radio network identifier HS-DSCH (HS-DSCH RNTI) and the HSDPA connection frame number (HSDPA CFN) can be added.

For message 710 RESPONSE TO THE RADIO LINE DELETION REQUEST shown in FIGS. 7A and 7B, the information element group 704 notifies whether the requested replacement of the serving cell was successful / unsuccessful. Information element group 704 An HS-DSCH response information may carry a Transport Layer Address, etc. The MAC-hs reset indicator information element and the HS-DSCH temporary radio network identifier information element, which are applicable only to the RNSAP application part, as they do not exist in the NBAP application part, can be added. These three information elements are set when the above information element group 704 notifies of “success”. When the above group of information elements 704 (Serving Cell Replacement Indicator) notifies of a "failure", the Cause information element (9.2.1.6) can be added to the messages. For the case of replacing the HS-DSCH serving cell between nodes B, you can also add the response information element with the FDD HS-DSCH information.

For a radio link deletion procedure with replacement of an E-DCH serving cell, message 604 REQUEST FOR REMOVING A RADIO LINE (Figs. 7A and 7B) includes an E-DCH serving radio link information element and a time information sub-element (e.g., E-DCH CFN) indicating when the node B starts transmitting E-AGCH data over the new E-DCH serving radio link. These two information elements may belong to the same information element 602 (an example of the name of the information element is the E-DCH serving cell replacement information), which is used to replace the E-DCH serving cell. To replace the E-DCH serving cell inside / between nodes B with an E-DCH installation (that is, the E-DCH is not configured in node B), information element 620 E-DCH FDD information and E-DPCH information information element ( note that this also allows the installation of an E-DCH without replacing the serving cell in accordance with the procedure for adding a radio link). Message 710 RESPONSE TO THE REQUEST FOR REMOVAL OF THE RADIO LINE (Fig. 7B) may include an information element 720 indicating whether the required replacement of the serving E-DCH cell was successful / unsuccessful. If the indicator informs of “success”, the information element “FDD E-DCH downlink control channel information” may be included both for the new serving radio line and for the old serving radio line, if the indicator notifies of “failure”, the information element may be included "Reason", as shown in figv. To replace the E-DCH serving cell inside / between nodes B with the E-DCH installation, the "Response with E-DCH FDD information" information element can also be included.

Figure 5 shows a radio network subsystem (RNS) comprising a serving radio network controller (SRNC) connected to a core network CN (not shown) via a lu interface and to a node B through a lub interface. Node B, in turn, is connected to the user device via the Uu interface. It is shown that the SRNC has a first I / O interface associated with the lu interface and a second I / O interface associated with the lub interface. A processor for processing signals in the SRNC is associated with both the first and second input / output interfaces of the SRNC. It is similarly shown that the Node B is connected to the first I / O interface associated with the lub interface, and the second I / O interface is connected to the Uu interface. A processor for processing signals in the node B is connected with both the first and second input / output interfaces of the node B. It is shown that the user device has an input / output interface associated with the Uu interface and with a processor for processing signals in the user device.

A processor for processing signals from the SRNC controls the quality of service (QoS) of the user device. The handover control function (BUT) of the processor for signal processing receives the measurement results for neighboring cells from the user device and identifies the need to start lub / lur radio link control procedures (installing a radio link, adding a radio link, deleting a radio link, reconfiguring a radio link) based on radio resource management (RRM) rules . The processor for processing signals from the SRNC is also responsible for deciding on the HS-DSCH / E-DCH serving cell and replacing it when necessary. He may decide to replace the HS-DSCH / E-DCH serving cell in a synchronized or non-synchronized manner.

A processor for processing the signals of the node B is responsible for transmitting / receiving HSDPA / E-DCH data to / from the radio interface. It also assigns HSDPA / E-DCH resources to user equipment. He receives lub HSDPA data and is responsible for scheduling the transfer of HSDPA data to the radio interface. It performs processing when replacing the HS-DSCH serving cell at the request of the SRNC. It performs similar procedures for the E-DCH. It processes the radio link control procedures at the request of the SRNC.

A processor for processing user device signals measures the parameters related to neighboring cells and sends measurement report messages to its SRNC. It receives and processes Active Set Update (ASU) messages at the request of the SRNC. It receives and processes DSCH / E-DCH serving cell replacement messages at the request of the SRNC.

The processors for processing the signals in the user device and the SRNC follow the Radio Resource Control (RRC) procedures described in 3GPP TS 25.331 v. 6.6.0 (2005-06) "Technical Specification Group Radio Access Network; Radio Resource Control (RRC); Protocol Specification (Release 6)". A brief overview of RRC states and state changes is given in clause 7 (“Protocol States”) of this document and describes the characteristics of the measurement process according to the measurement control information as defined in clauses 8.4 (Measurement Procedures) and 14.4 (Traffic Volume Measurements). According to these procedures, the processor for processing the user device signals (FIG. 5) prepares the RRC Measurement Report in FIGS. 3 and 4 and sends it via its I / O device via the Uu interface to node B, and then node B sends it via the lub interface to the SRNC controller. The measurement report itself is described in clause 8.4.2 of TS 25.331, which determines that the report is transmitted on the DCCH uplink when the criteria for reporting the report stored in the MEASUREMENT_IDENTITY variable are satisfied for any measurement of current traffic or measurement by determining the location of the user device, which run on the user device. Special measurement functions are described in clause 14 of TS 25.331. In a measurement management message (not shown), the UTRAN notifies the user device which events should trigger a measurement report. The listed events are in the tool kit, from which the UTRAN can select the events for the report that are necessary for the function of handover evaluation or other functions of the radio network. The SRNC performs a procedure in the signal processor to determine if there is a need to add a radio link. See 3GPP TR 25.931 v. 6.2.0 (2005-06), "Technical Specification Group RAN; UTRAN functions, examples on signalling procedures (Release 6)". If this is the case, then after performing the procedures described below, the ACTIVE DATABASE UPDATE message is sent from the SRNC to the user device via node B, and the specified message is used by the UTRAN to add, replace, or delete the radio link in the active set of the user device (message description UPDATE For the ACTIVE KIT, see clause 10.2.1 of TS 25.331 v. 6.6.0 (2005-06)).

The following describes the steps in node B when receiving an advanced request message to add a radio link, as illustrated by the right side of FIG. 3. First of all, the radio link request message 600 is improved, as shown in FIG. 6A, by including new information 602 about the new HS-DSCH serving cell, which is identified by the HS-PDSCH radio link identifier, as well as such information relating to the new radio link as defined in Version 99. The message 600 requesting the addition of the radio link in FIG. 6A may also contain a connection frame number (CFN). In response to a message 600 requesting to add a radio link, the Node B first adds a new radio link to the Node B communication context (NBCC, Node B communication context). If the radio link addition request message 600 contains an HS-PDSCH radio link identifier, a temporary HS-DSCH radio network identifier and a CFN connection frame number indicating when a new HS-DSCH serving cell will be activated, node B prepares a new configuration and responds to the SRNC with using the enhanced response message 700 to the request for the addition of a radio link (FIG. 7A). Then, the Node B activates a new serving cell of the HS-DSCH in the CFN, which was included in the message 600 requesting the addition of a radio link. If the radio link addition request message 600 does not contain a CFN connection frame number, the Node B activates the replacement of the HS-DSCH serving cell after the new radio link is included in the NBCC context. If the new radio link in message 600 requesting the addition of a radio link is in a cell that is different from the new HS-DSCH serving cell, adding the radio link to the NBCC context and replacing the HS-DSCH serving cell can be performed independently and individually, in compliance with the implementation. The procedure for the E-DCH is similar except for the use of the corresponding new information elements shown in FIG.

Figure 4 shows the actions performed in node B upon receipt of an enhanced message requesting the removal of a radio link. The enhanced radio link deletion message 710 contains radio link information that needs to be deleted, as in the information item for the old version 99, but also contains a new information item identifying the serving cell of the HS-DSCH and shown in FIG. 6A as the identifier of the radio link HS-PDSCH in information element / group 602. In response, the Node B removes the first requested radio link from the NBCC context. If the radio link deletion request message 604 contains the HS-PDSCH radio link identifier, the temporary HS-DSCH radio network identifier, and the connection frame number, when the new HS-DSCH serving cell is activated, the Node B prepares a new configuration and responds to the SRNC using the advanced response message 710 to a request to delete a radio link, as shown in FIG. 7A, with new information elements suitable for the HS-DSCH. Then, the node B activates a new serving cell of the HS-DSCH in the frame with the CFN number, which was included in the request message to add a radio link. If the radio link removal request message does not contain a CFN, the Node B activates the replacement of the HS-DSCH serving cell after removing the radio link from the NBCC context. The procedure for removing a radio link and replacing an HS-DSCH serving cell may be established in accordance with the specific order desired for implementation. The procedure for the E-DCH is similar when using the corresponding new information elements 720 shown in FIG.

FIG. 8 is a flowchart illustrating a series of procedural steps that may take place in a network element, such as a Serving Radio Network Controller (SRNC), shown in FIGS. 3 or 4. Illustrated steps may be implemented as executable machine code written in any programming language. Such machine code may be stored in read-only memory, such as the ROM 900 shown in FIG. 9, within a processor 902 for processing signals. Such a signal processing processor may be used, for example, in the SRNC in FIG. 5 to perform the procedural steps shown in FIG. Inside such a signal processing processor 902, there is a data, address, and control bus 904 used to interact with various components, such as a central processor 906, random access memory 908 (RAM), clock 910, input / output device 912, and other devices shown in general view at 914, but not limited to. The central processor 906 executes the encoded instructions stored in the ROM 900, while the intermediate calculations and results are stored in the RAM 908. The RAM 908 can also be used to store a measurement report received from a user device that the central processor 906 can control to execute the encoded instructions stored in ROM 900 and for formulating a request message to add a radio line sent along line 600 in FIG. 3 or a request message to delete a radio line sent on line 604 in FIG. four. Back to Fig; after entering step 800, step 802 of receiving the measurement report from the user device shown in FIGS. 3 and 4 is performed. At step 804, the measurement report is evaluated and decision 806 is made whether the procedure of adding a radio link or deleting a radio link is required or no. At decision block 808, it is determined whether such a message is required or not, and if the message is required, then the corresponding message is formulated and sent to block B in step 810, as shown in the example of a message asking to add a radio line via line 600 in FIG. .3 or messages requesting the removal of the radio link along line 604 of FIG. 4. Then, the SRNC awaits a response, as shown in decision block 812, and as soon as it is determined that a response has been received, step 814 of actually receiving and processing a response message to a request to add a radio link or a response message to a request to delete a radio link is executed, as shown, for example, lines 700 and 710 in FIGS. 3 and 4, respectively. The SRNC then evaluates the received message, as shown, for example, in step 816. In step 818, it is determined whether the request was successful or not. If not, then at 820, the cause of the failure is checked. If successful, at step 822, a return occurs. A return may also be made in step 822 directly from decision step 808, if it is determined that the addition or removal of the radio link is not required.

10, a flowchart illustrates a procedure for execution in a user device according to the present invention. After entering step 1000, step 1002 is performed to transmit the measurement report shown in FIGS. 3 and 4 from the user device to the SRNC. After some time, the user device receives an update of the active set from the SRNC, as shown in step 1004, corresponding to the update messages of the active set shown in FIGS. 3 and 4. Then, the user device in step 1006 updates the active set, and then receives the data HSDPA from the new cell, as shown in step 1008, after which return at step 1010.

Figure 11 shows the procedure performed in the network element, for example, the node shown in Fig.3-5. After entering step 1100, step 1102 of receiving a radio link addition message or a radio link removal message from another network element, such as the SRNC in FIGS. 3-5, is performed. Such a signal is shown, for example, in FIGS. 3 and 4, in the form of a signal along line 600 in FIG. 3 or a signal along line 604 in FIG. 4. Node B evaluates the received message, as shown in step 1104, and prepares a response message in step 1106. Then, the Node B sends a response message to the request to add the radio link or a response message to the request to remove the radio link to the SRNC, as shown by the signal on line 700 in FIG. 3 or the signal on line 710 in FIG. 4, as illustrated by step 1108 on 11. Then, at step 1110, a return occurs, as shown in FIG. 11.

Although the present invention has been considered and described by way of specific embodiments thereof, it should be understood that many other embodiments of the invention are possible within the scope of the appended claims.

Claims (28)

1. A computer-readable medium on which data is stored for transmission in messages about adding a radio line in the mobility procedure in a wireless communication system, each message serving for transmitting said data in a data structure according to a standard, and each message about adding a radio line includes a request containing an information element that includes identification of a radio link and an information element that includes information about replacing a high-speed serving cell th downlink shared channel. 2. The computer-readable medium according to claim 1, comprising a response to said request, said response comprising an information element identifying an information element of a response to a request to replace a serving cell, indicating success or failure when replacing the serving cell. 3. The computer-readable medium of claim 2, wherein said response comprises an information element identifying an information element of a response to a request to replace a serving cell. 4. The computer-readable medium of claim 1, wherein each radio link addition message includes a request comprising an optional information element identifying a serving radio link of an enhanced dedicated channel. 5. The computer-readable medium of claim 2, wherein said response includes an information element indicating a medium access control indicator. 6. The computer-readable medium of claim 2, wherein said response includes an information element indicating a temporary radio network identifier. 7. The computer-readable medium of claim 5, wherein said response includes an information element indicating a temporary radio network identifier. 8. Computer-readable medium according to claim 4, characterized in that said response includes an information element identifying control channel information of said uplink serving radio link of the enhanced dedicated channel. 9. The network element that responds to the message with the report on the measurements from the user device, to provide the specified message on the addition of the radio line according to the data structure of the specified request according to claim 1 to another network element of the specified wireless communication system and to receive a response message to the request for the addition of the radio line with an indication of success or failure. 10. A user device for providing a measurement report to a network element with information related to neighboring cells, and for receiving from the specified network element a message about updating the active set according to the data structure according to claim 1, optionally including the specified information element identifying the specified connection frame number wherein said information relating to said connection frame number is also sent from said network element to another network element in said message about adding a radio link. 11. A network element for radio communication with a user device that responds to the specified message about adding a radio line according to the data structure according to claim 1, containing the specified request, which optionally includes the specified information element identifying the specified frame number of the connection to provide a response message to the request for addition a radio link to another network element that has sent the indicated message about adding a radio link. 12. A communication system comprising
a user device for providing a measurement report containing information about neighboring cells of the specified system, and for receiving an update message on the active set, optionally including information about the frame number of the high-speed packet data access connection;
a first network element responsive to said measurement report for providing said active set update message to said user device and for providing a request message for adding a radio line optionally including said information about a frame number of a high speed packet data access connection; and a second network element responsive to said request message to add a radio link, for correspondingly providing a response message to a request to add a radio link to said first network element. 13. The communication system of claim 12, wherein said first network element also responds to said response message to a request to add a radio link to provide said update message of an active set. 14. The method of functioning of the communication system, including
providing a measurement report to a network element with information about neighboring cells; and
receiving from the specified network element a message about updating the active set, optionally containing information about the frame number of the connection of the high-speed packet data access, and the specified information about the frame number of the connection of the high-speed packet data access is also optionally sent from the specified network element to another network element in the message about adding a radio link, and the specified other network element supports radio communication with the specified user device. 15. The method of functioning of the communication system, including
receiving a message with a measurement report from the user device; and
providing a radio link addition message as a request message to another network element, optionally including a frame number of a high-speed packet data connection connection as an information element. 16. The method of functioning of the communication system, including
receiving, from another network element, a radio link addition message having an optional information element identifying a frame number of a high speed packet data access connection; and
providing a response message to the request to add the radio link to the specified other network element. 17. The method of transmission service, including
sending a measurement report from a user device having information about neighboring cells to a radio network controller;
providing a request message to add a radio line having an optional information element identifying a frame number of a connection of a high-speed packet data access from the specified serving radio network controller to the base station in response to the specified measurement report message, sending a response message to the request to add the radio line from the specified base station to the specified service radio network controller in response to the specified message requesting to add a radio line; and
sending a message about updating the active set with the specified optional information element identifying the specified frame number of the connection of the high-speed packet data access from the specified serving radio network controller to the specified user device in response to the specified message in response to the request to add a radio line. 18. The method of transmission service, including
reception by the serving radio network controller of a measurement report message containing information about neighboring cells from the user device;
sending a message about updating the active set with the optional information element of the frame number of the connection of high-speed packet data access from the specified serving radio network controller to the specified user device;
sending from the specified serving radio network controller to the base station intended for radio communication with the specified user device, a request message to delete the radio line with the specified optional information element of the connection frame number; and
sending from the specified base station to the specified serving radio network controller a response message to the request for removal of the radio link, after which the data is sent from the specified serving radio network controller to the specified user device through the specified base station. 19. A computer-readable medium comprising a computer program for processing radio link addition messages related to a mobility procedure in a wireless communication system, where each message contains a request including an information element comprising a radio line identification and an information element containing information on replacing a serving cell a high speed downlink shared channel, wherein said request optionally comprises an information element identifying n frame measures compound high speed packet data access, and said radio link identification relates to a high speed physical downlink shared channel. 20. An integrated circuit for processing radio link addition messages in a mobility procedure in a wireless communication system, where each message includes a request comprising an information element that includes radio link identification and an information element that includes information on replacing a serving cell of a high speed downlink shared channel moreover, the specified request optionally contains an information element identifying the frame number of the connection high-speed packet data access, and said radio link identification refers to a physical high speed downlink shared channel. 21. A user device comprising a transmitter for reporting a measurement report to a network element with information about neighboring cells and a receiver responsive to a message about updating the active set from said network element, said message optionally including information on a frame number of a high speed packet access connection data, and the specified information about the frame number of the connection high-speed packet data access is optionally also sent from the specified network the element in another network element in a message about adding a radio line or in a message about removing a radio line, while the specified other network element supports radio communication with the specified device. 22. The radio network controller, including
a receiver responding to a measurement report from a user device; and
a transmitter for providing a radio link addition message in the form of a request message to another device, wherein a frame number of a high-speed packet data access connection is optionally included in the specified radio link message as an information element. 23. The radio network controller of claim 22, further comprising means responsive to a response message to a request to add a radio link from said other device to provide the user device with an update of the active set containing said frame number of a high-speed packet data access connection in the form of information element of the specified active set update message. 24. A base station containing
a receiver responsive to a radio link addition message from another device comprising an optional information element identifying a frame number of a high speed packet data access connection; and
a transmitter for providing a response message to a request to add a radio link to a specified other device. 25. The base station according to paragraph 24, in which the user device is able to receive data from a new cell using the specified frame number of the connection high-speed packet data access. 26. A communication system comprising
a user device for sending a message with a report containing information about neighboring cells;
a serving radio network controller responsive to said measurement report from said user device to provide a request message to add a radio link containing an optional information element identifying a frame number of a high speed packet data access connection;
a base station that responds to the request message to add a radio line to send a response message to a request to add a radio line to a specified radio network service controller, while in response to receiving said response message to a request to add a radio line from a specified base station, said service radio network controller sends an update message to the active set with the specified optional information element identifying the specified high-speed connection frame number packet access to data specified by the user device for use by the specified user device when selecting a suitable frame number to start receiving information on the added radio link. 27. A communication system comprising
a serving radio network controller that responds to a measurement report message containing information about neighboring cells to send an active set update message with an optional information element for a high-speed packet data connection number frame to a specified user device and to send a message asking to delete the radio line from the specified optional information element of the frame number of the connection high-speed packet data access; and
a base station that responds to the specified request to delete the radio line with the specified optional information element of the connection frame number, to send the specified service controller of the radio network a response message to the request to delete the radio line, after which it is possible to transmit data from the specified service controller of the radio network to the specified user device through the specified the base station using the specified optional information element of the connection frame number. 28. A radio network controller comprising
means for receiving a measurement report from a user device; and
means for providing a message about adding a radio line in the form of a message requesting another device, moreover, the frame number of a connection for high-speed packet data access is included in the specified message about adding a radio line as an information element.

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