WO2008037217A1

WO2008037217A1 - Method, apparatus and system for preventing periodical cross-cell update from failure

Info

Publication number: WO2008037217A1
Application number: PCT/CN2007/070777
Authority: WO
Inventors: Lijun Xue; Guanchen Li
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-09-25
Filing date: 2007-09-25
Publication date: 2008-04-03
Also published as: CN101317490B; CN101317490A; DE112007000077T5; DE112007000077B4; SE0850012L; CN102325368A; CN101155377A; SE533013C2; CN102325368B

Abstract

A method for preventing the periodical cross-cell update from failure comprises the steps: when the Drift Radio Network Controller DRNC is changed to be a Serving Radio Network Controller SRNC for the User Equipment UE, it sets a first time length of the coverage area update control timer on the DRNC to be more than or equal to the time length of the coverage area update control timer on the SRNC to which the UE currently belongs; the coverage area update control timer on the DRNC is started; the time length of the coverage area update control timer on the SRNC to which the UE currently belongs is set by the SRNC to which the UE currently belongs. The method can ensure that the periodical cell or URA update initiated by the DRNC is completed when the counting time of the T305 timer of the UE expires.

Description

Method, device and system for preventing periodic cross-region update failure

Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a method, apparatus, and system for preventing periodic cross-region update failure. Background of the invention

In the existing 3GPP protocol, after the user equipment (UE) enters the CELL_FACH, CELL_PCH or URA_PCH state, it periodically initiates a cell (CELL) or URA (UTRAN registration area) update to the RNC. At this time, the UE and the RNC (Wireless Network Controller) will simultaneously start their respective coverage area update control timers, such as the T305 timer. When the timing of the T305 timer of the UE arrives, the UE initiates a cell or URA update request to the RNC, and simultaneously closes the T305 timer of the UE; after receiving the update request, the RNC sends a cell update confirmation message to the UE (CELL UPDATE CONFIRM) At the same time, the T305 timer of the RNC restarts timing; when the UE receives the update confirmation message sent by the RNC, the T305 timer of the UE also restarts timing. The UE's T305 timer is synchronized with the RNC's T305 timer restart timing. If the timing of the T305 timer of the UE is up, the UE fails to initiate a cell or URA update procedure to the RNC, for example, if the UE is abnormally shut down or the UE enters the network coverage dead zone, the RNC releases the link of the UE to prevent the RNC from being allocated to the UE. Waste of resources.

When the UE reselects from the Serving Radio Network Controller (SRNC) coverage into the Drift Radio Network Controller (DRNC) coverage, the 3GPP gives the UE's cell or URA update migration procedure. The update migration process rebuilds the UE-related resources on the SRNC on the DRNC. Thus, when the cell or URA update migration process ends, the DRNC becomes the current SRNC of the UE. In the cell or URA update migration process of the UE, since two RNCs are involved, that is, the UE currently belongs to the SRNC and the DRNC, and according to the 3GPP protocol, the duration of the T305 timer can be set to 5, 10, 30, 60, 120, 360. , 720 or not updated, the duration is in minutes. Therefore, if the durations of the T305 timers of the two RNCs are different, and the duration difference is large, the resources allocated to the UE may be released early when the UE is still online. , the UE's cell or URA update failed. Summary of the invention

In view of this, a first object of the present invention is to provide a method for preventing periodic cross-region update failure, preventing periodic cross-region update failure of the UE.

A second object of the present invention is to provide an apparatus for preventing periodic cross-region update failure, preventing periodic cross-region update failure of the UE.

A third object of the present invention is to provide a system for preventing periodic cross-region update failures, preventing periodic cross-region update failure of UEs. A first aspect of the object of the invention is achieved by the following technical solution:

A method for preventing periodic cross-region update failure, comprising the following steps: when a drift radio network controller DRNC is converted into a serving radio network controller SRNC of a user equipment UE, the coverage area update control timer on the DRNC The second duration is set to a first duration, where the first duration is greater than or equal to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs; and the duration of the coverage area update control timer on the current SRNC to which the UE belongs. Set by the current SRNC to which the UE belongs;

The coverage area update control timer on the D RN C is started.

A method for preventing periodic cross-region update failures, including:

When the drift radio network controller DRNC is converted into a service radio network of the user equipment UE When the network controller is the SRNC, the DRNC updates the coverage area update control timer on the DRNC according to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs, which is carried in the cell of the received migration request message. The second duration of the device is set to a first duration; wherein the cell is preset in the migration request message; and the coverage area update control timer on the D RN C is started.

A second aspect of the object of the present invention is achieved by the following technical solutions:

A device for preventing periodic cross-region update failure, comprising: a timer duration change module, a timer timing control module, wherein

The timer duration change module is configured to: when the drift radio network controller DRNC is converted into the serving radio network controller SRNC of the user equipment UE, the current SRNC of the UE that is carried in the cell according to the received migration request message The duration of the coverage area update control timer is set to a first duration of the coverage area update control timer on the DRNC; the cell is preset in the migration request message;

The timer timing control module is configured to start a coverage area update control timer on the DRNC.

A third aspect of the object of the present invention is achieved by the following technical solutions:

A system for preventing periodic cross-region update failure, comprising: a device for preventing periodic cross-region update failure, a SRNC and a DRNC to which the UE currently belongs;

The device includes: a timer duration change module, and a timer timing control module;

The timer duration change module is configured to: when the drift radio network controller DRNC is converted into the serving radio network controller SRNC of the user equipment UE, the current SRNC of the UE that is carried in the cell according to the received migration request message The coverage area on the upper update control timer, the coverage area update control timer on the DRNC The second duration is set to a first duration; the cell is pre-set in the migration request message;

The timer timing control module is configured to start a coverage area update control timer on the DRNC;

The device is disposed on the DRNC.

It can be seen from the above that the present invention starts the coverage area update control timer on the DRNC when the DRNC is converted to the SRNC of the UE, and the duration of the timer, that is, the first duration is greater than or equal to the coverage area on the SRNC to which the UE belongs. Update the length of the control timer. Therefore, when the timer currently used by the UE is the same as the timer of the coverage area update control timer on the SRNC to which the UE belongs, the DRNC can receive the periodic cell or URA update request sent by the UE, and corresponding to the request. Processing to ensure that the periodic cell or URA update of the UE is successful. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a preferred embodiment of a method for preventing periodic cross-region update failure provided by the present invention;

2 is a schematic diagram of message interaction between network entities corresponding to the first modification manner in FIG. 1;

3 is a schematic diagram of message interaction between network entities corresponding to the second modification manner in FIG. 1;

4 is a schematic structural diagram of a first preferred embodiment of an apparatus for preventing periodic cross-region update failure provided by the present invention;

Figure 5 is a schematic view showing the structure of the apparatus of Figure 4 further refined;

6 is a schematic structural diagram of a second preferred embodiment of an apparatus for preventing periodic cross-region update failure provided by the present invention; FIG. 7 is a schematic structural diagram of a preferred embodiment of a system for preventing periodic cross-region update failure provided by the present invention. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In the prior art, since the durations of the T305 timers of the SRNC and the DRNC are different, and the duration difference is large, the resources allocated to the UE may be released in advance if the UE is still online, the UE's cell or URA. The update failed. The reasons for this problem are as follows:

The T305 timer of the SRNC is the T305A timer, the duration of the timer is A; the T305 timer on the DRNC is the T305B timer, the duration of the timer is B; and the T305 timer on the UE is the T305C timer. When the cell update migration process is triggered, the DRNC changes the duration of the T305C timer of the UE from A to B by issuing a UTRAN MOBILE INFORMATION, and the T305B timer on the DRNC starts with the T305C timer on the UE. Timing. However, after the DRNC configures the T305C timer of the UE for a new period of time, according to the 3GPP protocol, the duration of the T305C timer currently used by the UE is still A, and when the current UE's T305C timer expires, the UE initiates After the periodic cell or URA update is complete, the UE starts to restart the T305C timer, and the duration of the T305C timer is B. Therefore, when the duration of the T305C timer currently used by the UE is still A, if A is much larger than B, the T305B timer on the DRNC will time out, and the T305C timer on the UE has not expired. The UE does not initiate a cell or URA update request to the DRNC. In this way, the DRNC releases the allocation to the UE because it fails to receive the UE's cell update message when the T305B timer expires. The resource causes the UE cell or URA update to fail.

The present invention mainly sets the duration of the coverage area update control timer on the DRNC to be greater than or equal to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs. When the DRNC is converted to the SRNC of the UE, the system starts the coverage area update control timer on the DRNC. Therefore, after the periodic cell or URA update migration ends and the DRNC is switched to the SRNC of the UE, the DRNC can receive the timer that is the same as the duration of the coverage area update control timer on the SRNC to which the UE belongs. The periodic cell or URA update request sent by the UE, and corresponding processing is performed on the request, thereby ensuring that the periodic cell or URA update of the UE is successful.

There are two ways for the present invention to change the duration of the coverage area update control timer on the DRNC. The coverage area update control timer on the DRNC is the T305 timer. The coverage area update control timer on the SRNC to which the UE belongs is also the T305 timer. The timer on the UE is also the T305 timer. The two modification methods are as follows: The first modification manner is: adding a sub-cell to the SRNC relocation cell (SNRC RELOCATION INFORTATION) provided by the current SRNC to the DRNC, where the sub-cell carries the current Duration of the T305 timer on the SRNC to which the UE belongs. After the foregoing sub-cells are added to the migrating request message, the sub-cell information in the UTRAN mobile information cell table can be as shown in Table 1. The sub-cell carrying the duration of the T305 timer of the SRNC is the present invention. The number of sub-cells added to the cell structure of the protocol, and the duration of the T305 timer of the SRNC is one of the values listed in the parameter information column of Table 1. The above sub-cells are carried to the DRNC by a RELOCATION REQUIRED message. The duration of the T305 timer currently used by the UE is the duration of the T305 timer of the SRNC to which the UE belongs. After receiving the migration request message, the DRNC learns the duration of the T305 timer currently used by the UE according to the information carried in the sub-cell. UTRAN mobile information

Cell

( UTRAN Required or

Parameter information Remarks

Mobility optional

Information

Elements )

URA cell identity Optional See 3GPP Association

( URA ( OP ), TS.25.331, same as 3GPP, Identifier) Section 10.3.2.6

SRNC T305 timing optional (5,10,30,60,120,360 units: minute; crying (OP), 720, infinity) infinity means not updating Table 1 When the DRNC receives the migration request message, it parses out the above-mentioned carried in the sub-cell The duration of the T305 timer on the DRNC is set to the duration of the T305 timer on the SRNC to which the UE belongs, that is, the duration of the T305 timer currently used by the UE. When the DRNC is converted to the UE's SRNC and the T305 timer is started for the first time, the duration of the T305 timer is the first duration.

The second modification method is: when the DRNC is converted to the UE's SRNC, the T305 timer is started for the first time. The default value of the T305 timer is the maximum duration of the T305 timer allowed by the 3GPP. The maximum duration is Tmax. When there is no added sub-cell carrying the duration of the T305 timer used by the current UE in the migration request message, the first duration of the T305 timer on the DRNC is changed to the Tmax of the T305 timer allowed by the 3GPP.

It can be seen that the above second modification method is actually an addition to the first modification method. The cell is a supplement to the options shown in Table 1.

When the current periodic cell or URA update of the UE is completed, the DRNC is converted to the SRNC of the UE, which is still called the DRNC, and the DRNC changes the first duration of the T305 timer to the second duration. The second duration is the second duration. The common duration of the T305 timer on the DRNC can be called the configured duration.

Correspondingly, in the present invention, when the DRNC is converted to the SRNC of the UE, the DRNC may update the duration of the control timer according to the coverage area on the SRNC to which the UE currently belongs, which is carried in the cell of the received migration request message, on the DRNC. The second duration of the coverage area update control timer is set to a first duration; wherein, the foregoing cell is preset in the migration request message; and the first duration is greater than or equal to the coverage area update control timer on the current SRNC to which the UE belongs. The length of time.

The duration of the T305 timer on the DRNC, thereby preventing the implementation of a preferred embodiment of periodic cross-region update failure. The message interaction between the network entities corresponding to the embodiment shown in Fig. 1 can be seen in Figs. 2 and 3. The message interaction shown in FIG. 2 is a message interaction corresponding to the first modification manner given by the present invention, and the message interaction shown in FIG. 3 is a message interaction corresponding to the second modification manner given by the present invention. SRNC and DRNC are the SRNC and DRNC to which the UE belongs before the end of the update migration process.

The implementation process of the embodiment shown in FIG. 1 includes the following steps:

Step 101: The cell or URA update migration process is triggered.

Step 102: The SRNC sends a relocation request message (RELOCATION REQUIRED) to the DRNC through the relay communication device.

Step 103: The DRNC parses the received relocation request message, and if the message is parsed, the time length of the T305 timer on the SRNC to which the UE belongs is added. Sub-cell, step 104 is performed; otherwise, step 105 is performed.

Step 104: The DRNC sets the duration of the T305 timer to the duration of the T305 timer on the SRNC to which the UE is currently carried in the foregoing sub-cell, and performs step 106.

In actual applications, the DRNC can also set the duration of the T305 timer to be longer than the duration of the T305 timer on the SRNC to which the UE belongs.

Step 105: The DRNC sets the duration of the T305 timer on the DRNC to Tmax according to the setting, and executes step 106.

Step 106: When the update migration process ends, the DRNC starts the T305 timer on which the duration has been changed.

Step 107: The DRNC sends a UTRAN MOBILITY INFORMATION message to the UE to change the duration of the T305 timer currently used by the UE as the configured duration.

Step 108: After receiving the message sent by the DRNC to change the duration of the T305 timer, the UE returns a UTRAN MOBILITY INFORMATION CONFIRM message to the DRNC, but does not immediately start the T305 timer.

Step 109: When the T305 timer currently used by the UE expires, the UE sends a cell or URA update procedure to the DRNC.

Step 110: After receiving the update request sent by the UE, the DRNC sends an update confirmation message to the UE.

Step 111: The DRNC changes the duration of the T305 timer on it to the configured duration, and starts the timer.

Step 112: The UE receives the update confirmation message sent by the DRNC, and starts the T305 timer configured by the DRNC for the UE in step 107.

In the foregoing steps, step 106 to step 110 initiate periodic small for the existing UE. District or URA update process.

The present invention is based on the foregoing method for preventing periodic cross-region update failure, and provides a schematic structural diagram of a first embodiment of the apparatus for preventing periodic cross-region update failure as shown in FIG. The device includes: a timer duration change module 401 and a timer timing control module 402;

a timer duration change module 401, configured to: when the DRNC is converted to the SRNC of the UE, according to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs, which is carried in the cell of the received migration request message, The second duration of the coverage area update control timer on the DRNC is set to a first duration; wherein the cell is preset in the migration request message;

The first duration may be greater than or equal to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs;

The timer timing control module 402 is configured to start a coverage area update control timer on the DRNC.

The duration of the coverage area update control timer on the SRNC to which the UE currently belongs belongs to

The current SRNC setting of the UE.

Figure 5 is a schematic view showing the detailed structure of the apparatus shown in Figure 4. The timer duration change module 401 may specifically include the modules added in FIG. 5: an update migration message receiving module 501, a sub-cell information lookup module 502, and a change module 503.

An update migration message receiving module 501, configured to receive a migration request message;

The sub-cell information search module 502 is configured to search for a cell of the duration of the coverage area update control timer on the current SRNC of the carried UE from the migration request message received by the update migration message receiving module 501, and if found, trigger The change module 503 sets the second duration of the coverage area update control timer on the DRNC to the first duration; if not found, triggers the change module 503 to cover the coverage area on the DRNC The second duration of the domain update control timer is set to the first duration, and the first duration is a maximum duration that the coverage area update control timer is allowed;

The change module 503 is configured to set the duration of the coverage area update control timer on the DRNC to be greater than or equal to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs.

FIG. 6 is a schematic structural diagram of a second embodiment of an apparatus for preventing periodic cross-area update failure according to the present invention. The present embodiment adds a timer duration second change module based on the apparatus shown in FIG. 4 or FIG. 5 above. 601 ;

The timer timing control module 402 is further configured to: when receiving the periodic cell update request sent by the UE, before the coverage area update control timer expires on the DRNC, shutting down the coverage area update control timer on the DRNC;

The device further includes: a timer duration second change module 601, configured to: after the timer timing control module 402 turns off the coverage area update control timer on the DRNC, set the first duration of the coverage area update control timer on the DRNC to The coverage area of the DRNC updates the second duration of the control timer;

The timer timing control module 402 is further configured to: after the timer duration second change module sets the first duration of the coverage area update control timer on the DRNC to the second duration of the coverage area update control timer on the DRNC, Start the coverage area update control timer on the DRNC again.

The timer duration second change module 601 includes: a cell update request message receiving module 6011 and a change module 6012;

The cell update request message receiving module 6011 is configured to receive a cell update request message that is sent by the SRNC to which the UE belongs to the DRNC;

The change module 6012 is configured to: after the cell update request message receiving module receives the cell update request message, the coverage area update control timer on the DRNC The first duration is set to the second duration of the coverage area update control timer on the DRNC.

The present invention also provides a system for preventing periodic cross-region update failure as shown in FIG. 7 based on the apparatus shown in FIG. 4 above, which system includes the current SRNC, DRNC of the UE. Take the T305 timer as an example to explain the system as follows:

The device for preventing periodic cross-region update failure is set on the DRNC. When the UE currently belongs to the sub-cell of the migration message sent by the SRNC to the DRNC, the duration of the T305 timer on the SRNC currently belonging to the UE, after receiving the message, the device changes the duration of the T305 timer on the DRNC to The first duration is the duration of the T305 timer on the SRNC to which the UE currently belongs.

When the UE that the UE currently belongs to the DRNC does not carry the sub-cell of the duration of the T305 timer on the SRNC to which the UE currently belongs, the device receives the message and changes the duration of the T305 timer on the DRNC. For the first duration, the first duration is Tmax.

In summary, the present invention starts the coverage area update control timer on the DRNC when the DRNC is converted to the SRNC of the UE, and the duration of the timer, that is, the first duration is greater than or equal to the coverage area on the SRNC to which the UE currently belongs. Update the length of the control timer. Therefore, when the timer currently used by the UE is the same as the timer of the coverage area update control timer on the current SRNC of the UE, the DRNC can receive the periodic cell or URA update request sent by the UE, and process the request accordingly. , thereby ensuring that the periodic cell or URA update of the UE is successful. Moreover, the present invention is based on the existing update migration procedure, and the above object of the present invention is achieved by improving the cell structure of the message, which is easy.

Claims

Claim

A method for preventing periodic cross-region update failure, comprising the steps of:

When the drift radio network controller DRNC is converted to the serving radio network controller SRNC of the user equipment UE, the second duration of the coverage area update control timer on the DRNC is set to a first duration, where the first duration is greater than or The duration of the coverage area update control timer on the SRNC to which the UE currently belongs; the duration of the coverage area update control timer on the current SRNC to which the UE belongs is set by the current SRNC to which the UE belongs;

The coverage area update control timer on the D RN C is started.

2. The method according to claim 1, wherein the area covered by the DRNC comprises:

The cell covered by the DRNC CELL or the UTRAN registration area URA.

The method according to claim 1, wherein the coverage area update control timer on the DRNC is a T305 timer;

The coverage area update control timer on the SRNC to which the UE currently belongs is a T305 timer.

The method according to claim 1, wherein after the coverage area update control timer on the DRNC is started, the method further includes:

If the periodic cell update request sent by the UE is received before the coverage area update control timer on the coverage area update control timer DRNC on the DRNC expires, the coverage area update control timing on the DRNC is closed. And setting a first duration of the coverage area update control timer on the DRNC to the second duration, and starting the coverage area update control timer on the DRNC again.

The method according to claim 1, wherein the setting of the first duration is greater than or equal to the duration of the coverage area update control timer on the SRNC to which the UE currently belongs includes:

The DRNC sets the duration of the coverage area update control timer on the DRNC to the coverage on the SRNC to which the UE belongs, according to the received migration message carrying the duration of the coverage area update control timer on the SRNC to which the UE belongs. The duration of the area update control timer is obtained by the duration of the coverage area update control timer on the DRNC.

The method according to claim 5, wherein the duration of the coverage area update control timer on the SRNC to which the UE currently belongs in the migration message is preset in the cell structure of the migration message. The added sub-cell is carried.

The method according to claim 1, wherein before the coverage area update control timer on the DRNC is started, the method further includes:

Setting a duration of the coverage area update control timer on the DRNC to the default value according to a preset default value of the coverage area update control timer on the DRNC;

The default value is the maximum duration of the allowed coverage area update control timer.

A method for preventing periodic cross-region update failure, comprising: when the drift radio network controller DRNC is converted into a serving radio network controller SRNC of the user equipment UE, the DRNC according to the received migration request The duration of the coverage area update control timer on the SRNC to which the UE is currently in the message, and the second duration of the coverage area update control timer on the DRNC is set to a first duration; The cell is pre-set in the migration request message; the coverage area update control timer on the D RN C is started.

9. The method according to claim 8, wherein the cell is pre- Set in the migration request message; the first duration is equal to the current UE

The coverage area on the SRNC updates the duration of the control timer.

10. The method of claim 9 wherein:

The duration of the coverage area update control timer on the SRNC to which the UE currently belongs is set by the SRNC to which the UE currently belongs.

A device for preventing periodic cross-region update failure, comprising: a timer duration change module, and a timer timing control module; wherein

The apparatus according to claim 11, wherein the timer duration change module comprises: an update migration message receiving module, a sub-cell information search module, and a change module;

The update migration message receiving module is configured to receive the migration request message, where the sub-cell information search module is configured to search for the carried in the update migration message received by the migration request message receiving module. If the cell of the coverage area update control timer on the current SRNC belongs to the UE, if found, the trigger change module sets the second duration of the coverage area update control timer on the DRNC to the first duration. If not found, the trigger change module sets a second duration of the coverage area update control timer on the DRNC to the first duration, and the first time The maximum length of time that the coverage area update control timer is allowed;

And the changing module is configured to set a duration of the coverage area update control timer on the DRNC to be greater than or equal to a coverage area update control timer duration on the SRNC to which the UE currently belongs.

The device according to claim 11, wherein the timer timing control module is further configured to: receive a periodic cell update sent by the UE before the coverage area update control timer expires on the DRNC. When requested, the coverage area update control timer on the DRNC is closed;

The device further includes: a timer duration second change module, configured to: after the timer timing control module turns off the coverage area update control timer on the DRNC, the coverage area update control timer on the DRNC The first duration is set to the second duration of the coverage area update control timer on the DRNC;

The timer timing control module is further configured to: in the timer duration, the second change module sets a first duration of the coverage area update control timer on the DRNC to a coverage area update control timer on the DRNC After the second time period, the coverage area update control timer on the DRNC is started again.

The apparatus according to claim 13, wherein the timer duration second change module comprises: a cell update request message receiving module and a change module; and the cell update request message receiving module, configured to receive the Determining, by the UE, the cell update request message sent by the SRNC to the DRNC;

The change module is configured to: after the cell update request message receiving module receives the cell update request message, set a first duration of the coverage area update control timer on the DRNC to be on the DRNC The second time period of the coverage area update control timer.

15. A system for preventing periodic cross-region update failure, comprising: The device that prevents the periodic cross-region update from failing, the SRNC and the DRNC that the UE currently belongs to; the device includes: a timer duration change module, a timer timing control module, where

The device is disposed on the DRNC.

The system according to claim 15, wherein the first duration is equal to a duration of a coverage area update control timer on the SRNC to which the UE currently belongs.