WO2010135952A1

WO2010135952A1 - Method and system for resource association in relocation

Info

Publication number: WO2010135952A1
Application number: PCT/CN2010/072583
Authority: WO
Inventors: 王丽涛
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-05-25
Filing date: 2010-05-10
Publication date: 2010-12-02
Also published as: CN101902787B; CN101902787A

Abstract

The invention discloses a resource association method and system in relocation. In a solution of the invention, when a user equipment (UE) needs to be relocated, a target radio access controller allocates a relocation identifier identifying the radio resources to the UE after allocating radio resources to the UE, and the relocation identifier is sequentially transferred through a radio resource response transmitted to a source radio access controller by the target radio access controller, a relocation requiring instruction transmitted to a core network (CN) by the source radio access controller, and a relocation message transmitted to the target radio access controller by the CN; according to the received relocation identifier in the relocation message, the target radio access controller associates the resources between the radio access controller and the CN allocated to the UE with the radio resources allocated to the corresponding UE. Rapid relocation can be implemented with the invention.

Description

Resource association method and system in relocation

The present invention relates to the field of mobile communications, and in particular to a resource association method and system in relocation. Background technique

In the mobile communication system, the location of the user often changes when the service is maintained. If the wireless access controller determines that the wireless signal coverage of the source cell where the user equipment (UE, User Equipment) is located is weak, the wireless signal coverage is selected. A good target cell is switched. The radio access controller may be a radio network controller (RNC) in a 3G mobile communication system or a base station controller (BSC, Base Station Controller) in a 2G mobile communication system.

If the radio access network types of the source cell and the target cell are the same but do not belong to the same radio access controller management, the handover of the UE is referred to as intra-system relocation; if the radio access network type of the source cell and the target cell At the same time, the handover of the UE is referred to as inter-system relocation.

In the current mobile communication system, the processing of intra-system relocation and inter-system relocation in the 2G mobile communication system and the 3G mobile communication system is as follows:

Steps 101 to 102: The radio access controller to which the source cell belongs, that is, the source radio access controller determines that relocation needs to be initiated according to the measurement report of the UE, and initiates a relocation request to the core network (CN, Core Network), and the relocation is performed. The target cell information is carried in the request.

Step 103: The CN initiates a relocation request message to the radio access controller to which the target cell belongs, that is, the target radio access controller, according to the target cell information carried in the received relocation request.

Step 104: After receiving the relocation request message, the target radio access controller allocates radio resources to the UE in the target cell, and prepares resources in the target cell and prepares resources with the CN. After the completion, the CN responds to the relocation request confirmation message.

Step 105: After receiving the relocation request acknowledgement message, the CN sends a relocation command to the source radio access controller to notify the source radio access controller to perform handover of the UE.

Step 106: After receiving the relocation command, the source radio access controller sends a handover command to the UE, and notifies the UE to initiate a handover, where the handover command carries the target cell information.

Step 107: After receiving the handover command, the UE performs handover, and notifies the target radio access controller that the handover is completed according to the target cell information carried in the handover command.

Step 108: After receiving the notification that the UE handover is completed, the target radio access controller notifies the CN that the relocation is completed.

Step 109: After receiving the notification that the target radio access controller relocation is completed, the CN notifies the source radio access controller to release the related resources of the UE.

Step 110: After receiving the notification of releasing the UE-related resources, the source radio access controller releases the related resources of the UE, and notifies the CN that the release of the UE-related resources is completed.

The steps of the above process are performed serially in time, which makes the UE still use the radio resource of the source cell during the period from step 101 to step 106. If the UE moves faster, the wireless signal of the source cell It will deteriorate rapidly, and the probability of UE relocation failure will be higher.

Aiming at the above situation, a relocation method is proposed, which shortens the time delay of the relocation processing by adding an interaction message between the radio access controllers, and implements fast relocation, thereby improving the success rate of relocation. In the processing of the relocation method, it is required to associate the radio resource allocated for the UE with the resource between the radio access controller allocated to the UE and the CN. However, there has been no corresponding solution for the specific implementation of associating the radio resources allocated for the UE with the resources allocated to the UE by the radio access controller and the CN, so that the relocation method cannot be effectively implemented. Summary of the invention

In view of this, the main object of the present invention is to provide a resource association method in relocation. And a system, the resource between the radio access controller and the CN allocated to the UE is associated with the radio resource allocated for the corresponding UE.

In order to solve the above technical problem, the technical solution of the present invention is implemented as follows:

A resource association method in relocation, when a user equipment (UE) needs to perform relocation, the method includes:

After the target radio access controller allocates radio resources to the UE, the UE allocates a relocation identification number identifying the radio resource, and the relocation identification number is sequentially sent to the radio resource of the source radio access controller by the target radio access controller. Responding to the relocation request command sent by the source radio access controller to the core network (CN), and the relocation message sent by the CN to the target radio access controller for transmission;

The target radio access controller associates the resource between the radio access controller and the CN allocated for the UE with the radio resource allocated for the corresponding UE according to the relocation identification number in the received relocation message.

The determining process that the UE needs to perform relocation specifically includes:

The source radio access controller determines that the UE needs to perform relocation according to the load and/or interference of the current cell and the target cell of the UE; and/or,

The source radio access controller determines that the UE needs to perform relocation according to the signal strength of the current cell and the target cell measured by the UE.

Resources between the radio access controller and the CN: allocated by the UE for the UE, or allocated by the target radio access controller for the UE; and/or,

The source radio access controller sends the relocation request command to the CN, the method further includes: when the source radio access controller sends the relocation request command to the CN, or delays the set time interval, the source wireless connection The incoming controller sends a handover command to the UE; and/or,

When the target radio access controller receives the handover complete message from the UE, it has not received the relocation message from the CN, and the method further includes: the target radio access controller waits for reception Receiving, by the relocation message of the CN, a relocation confirmation message to the CN after receiving the relocation message; and/or,

After receiving the relocation message, the target radio access controller further includes: after the target radio access controller detects the UE access, sending a relocation detection message to the CN.

The set time interval is:

The time interval at which the source radio access controller sends a relocation request command to the CN to receive the relocation command from the CN, and the source radio access controller sends a handover command to the UE to the target radio access controller to receive the UE from the UE. The absolute time difference of the time interval for switching completion messages; or the length of time configured according to the empirical value of the relocation test.

The relocation request instruction and the relocation message at least include: a field containing a relocation identification number, the field being a source radio access controller to target radio access controller information.

The resource between the radio access controller and the CN allocated by the UE according to the relocation identification number is associated with the radio resource allocated for the corresponding UE, and specifically includes: from the field source radio access controller to the target radio access The controller information extracts a relocation identification number, and the resource between the radio access controller and the CN allocated for the UE is associated with the radio resource allocated for the corresponding UE according to the relocation identification number.

The source radio access controller to target radio access controller information is: source radio network controller (RNC) to target RNC transparent transmission information; or information from the old base station subsystem (BSS) to the new BSS.

A resource association system in relocation, the system comprising: a source radio access controller, a target radio access controller, and a CN, where

The target radio access controller is configured to allocate a radio resource to the UE, and allocate a relocation identification number identifying the radio resource to the UE, and send a radio resource response carrying the relocation identification number to the source radio access controller, and receive the radio resource response. When the relocation message from the CN is based on the resource between the radio access controller and the CN allocated to the UE according to the relocation identification number in the relocation message The radio resources allocated by the UE are associated;

The source radio access controller is configured to receive a radio resource response from the target radio access controller, and transmit the relocation identification number to the CN by using a relocation request command;

The CN is configured to transmit the relocation identification number to a target wireless access controller via a relocation message.

The CN is further configured to allocate resources between the radio access controller and the CN, or the target radio access controller is further configured to allocate resources between the radio access controller and the CN to the UE; and/or, When receiving the handover complete message from the UE, the target radio access controller has not received the relocation message from the CN, and the target radio access controller is further configured to wait to receive the relocation message from the CN, and receive Sending a relocation confirmation message to the CN after the relocation message; and/or,

The target radio access controller is further configured to detect the UE access signal, and send the relocation detection message to the CN after detecting the UE access.

The source radio access controller to target radio access controller information is: source RNC to target RNC transparent transmission information; or, old BSS to new BSS information.

In the fast relocation process of the solution of the present invention, an interactive message is added between the radio access controllers without changing the protocol messages of the radio access controller and the CN and the existing relocation procedure of the UE. When the target cell allocates radio resources to the UE, the access controller further allocates a relocation identification number; the source radio access controller initiates a relocation request command to the CN, where the relocation request command carries a relocation identification number, The relocation identification number is sent to the target radio access controller by using a relocation message, so that the target radio access controller can allocate the radio access controller for the UE according to the relocation identification number in the received relocation message. The resources between the CNs are associated with the radio resources allocated for the corresponding UE. In addition, since the source radio access controller sends a relocation message to the CN, or sends a handover command to the UE after a certain time interval, the UE air interface switching process and the relocation preparation process between the access network and the CN are performed. Parallel operation shortens the total time of the relocation process, that is, the relocation time delay, and improves the relocation success rate.

The invention does not need to modify the protocol message flow of the radio access network controller and the CN, and the UE, and can be directly applied in the existing 2G mobile communication system and the 3G mobile communication system. DRAWINGS

Figure 1 is a flow chart of an existing relocation;

2 is a flow chart of a fast relocation implementation method according to the present invention;

3 is a flowchart of a second implementation manner of fast relocation in the present invention;

4 is a schematic diagram of a relocation process in a CS domain system of a UMTS according to the present invention;

FIG. 5 is a schematic diagram of a relocation process between a UMTS and a GSM CS domain system according to the present invention; FIG. 6 is a schematic structural diagram of a processing system in a fast relocation according to the present invention. detailed description

In the present invention, when the UE needs to perform relocation, after the target radio access controller allocates radio resources to the UE, the UE allocates a Relocation Identifier that identifies the radio resource, and the relocation identification number sequentially passes the target radio. The radio resource response sent by the access controller to the source radio access controller, the relocation request command sent by the source radio access controller to the CN, and the relocation message sent by the CN to the target radio access controller are transmitted; The access controller associates the resource between the radio access controller and the CN allocated to the UE with the radio resource allocated for the corresponding UE according to the relocation identification number in the received relocation message. The resource between the wireless access controller and the CN specifically refers to the resource between the target radio access controller and the CN, and may be allocated by the CN for the UE, or may be allocated by the target radio access controller for the UE.

Relocation request command, due to field source radio access controller to target radio access control The content of the device information is transparent to the CN, and the CN will forward the field to the target radio access controller as it is, so the relocation identification number can be transmitted through this field. That is, when the radio access controller is the RNC, the relocation request command is a relocation request message, and the field source RNC to the target RNC transparent information in the relocation request message (Source RNC To Target RNC Transparent Information _3⁄4 Source RNC To The content of the Target RNC Transparent Container is transparent to the CN, and the CN forwards the field to the target RNC intact; the radio access controller is the BSC, and the relocation request command is a handover request message, and the field in the handover request message is old. The content of the Base Station Subsystem (BSS, Base Station Subsystem) to New BSS (New BSS To New BSS Information) is transparent to the CN, and the CN forwards the field to the target BSC intact.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

FIG. 2 is a flowchart of a fast relocation implementation method according to the present invention. As shown in FIG. 2, the specific processing procedure of the fast relocation implementation manner 1 includes the following steps:

Step 201: The source radio access controller determines that the relocation of the UE needs to be initiated, and sends a radio resource request to the target radio access controller, requesting to allocate a radio resource to the UE in the target cell, where the radio resource request carries the UE identifier and the UE. Current service type, target cell ID, and other information.

The specific process of the source radio access controller determining that the relocation of the UE needs to be initiated is: the source radio access controller according to the load and/or interference situation of the cell and the target cell where the UE is currently located, and/or the current cell measured by the UE. And the signal strength of the target cell determines whether to initiate relocation to the target cell. For example, the source radio access controller finds that the measured current cell signal strength reported by the UE is weak, and the target cell signal strength is strong, and it is determined that the relocation of the UE needs to be initiated; for example, the radio access controller discovers the UE. The traffic load of the current cell is too high, and the traffic load of the target cell is relatively low, and it is determined that the relocation of the UE needs to be initiated.

The radio access controller has a logical interface between the IUR interface between the RNCs in the 3G mobile communication system or the IUR-G interface between the BSCs in the 2G mobile communication system. Or an IUR-G interface between the 3G mobile communication system RNC and the 2G mobile communication system BSC. In this way, the source radio access controller can send a radio resource request through a logical interface with the target radio access controller.

Step 202: After receiving the radio resource request, the target radio access controller allocates radio resources to the UE in the target cell, and allocates a relocation identification number identifying the radio resource to the UE, and then responds to the radio resource with the source radio access controller. In response, the radio resource response carries the UE identifier, the radio resource information allocated to the UE, and the relocation identification number, and may further carry information such as the target cell identifier.

Accordingly, the target radio access controller can transmit a radio resource response through a logical interface with the source radio access controller.

Step 203 to step 204: After receiving the radio resource response, the source radio access controller sends a relocation request command to the CN, and simultaneously sends a handover command to the UE. The field source radio access controller to the target radio access controller information of the relocation requesting instruction includes a relocation identification number, and the relocation request command further carries a UE identifier and a target cell identifier. The handover command carries radio resource information allocated to the UE in the target cell.

Step 205: After receiving the relocation request command, the CN sends a relocation message to the target radio access controller according to the target cell identifier, where the relocation message carries the UE identifier and the relocation identification number, and the relocation identification number is The field source radio access controller is included in the target radio access controller information.

Step 206: In time sequence, the target radio access controller first receives a relocation message from the CN, from the field source radio access controller to the target radio interface, compared to the time when the UE completes the handover completion message. Extracting a relocation identification number from the controller information, and according to the relocation identification number, the resource between the radio access controller and the CN allocated to the UE is associated with the radio resource allocated for the corresponding UE, and then responding to the relocation of the CN Confirm the message. The resource between the radio access controller and the CN may be allocated by the CN for the UE, and the CN may allocate the UE to the UE through the relocation message. The resource between the line access controller and the CN informs the target radio access controller; after the target radio access controller receives the relocation message, the target radio access controller allocates the UE for the UE.

Step 207: After receiving the relocation confirmation message, the CN sends a relocation command to the source radio access controller.

Step 208: After receiving the handover command from the source radio access controller, the UE performs handover according to the radio resource information allocated by the target cell, and after the handover is completed, responds to the handover completion message to the target radio access controller.

Steps 207 and 208 may have no obvious front-to-back order in time, and may be performed simultaneously or in tandem.

Step 209: After receiving the handover complete message, the target radio access controller sends a relocation completion instruction to the CN.

Step 210 to step 211: After receiving the relocation completion command, the CN sends a resource release instruction to the source radio access controller. After receiving the resource release command, the source radio access controller releases the resources used by the UE, and then responds to the CN with the resource release completion message.

The target radio access controller detects the access signal of the UE, and after receiving the relocation message in step 205, if the UE has been detected to be in the designated radio channel access, or after detecting that the UE is connected on the designated radio channel, In, the target radio access controller sends a relocation detection message to the CN.

After receiving the relocation request command in step 203, the CN determines whether the current relocation is a relocation within the CN or a relocation between the CNs according to the target cell identifier. If the current relocation is a relocation within the CN, that is, the CNs before and after the relocation are the same, the subsequent processing is exactly the same as that depicted in FIG. 2. If the current relocation is a relocation between the CNs, that is, the CNs before and after the relocation are different, at this time, the CN of the relocation request instruction in the receiving step 203 is the source CN, and the subsequent processing is not shown in FIG. Yes: the source CN provides the target source wireless access controller with the relocation identification number to the target CN to the target radio access controller information, and then the target CN performs step 205; The CN of the relocation confirmation message in step 206 is the target CN, and then the target CN notifies the source CN to send a relocation instruction to the source radio access controller, the source CN performs step 207; and receives the CN of the relocation completion instruction in step 209 as the target. CN, then the target CN informs the source CN that the source radio access controller releases the resource, and the source CN performs step 210, and receives the CN of the resource release complete message in step 211 as the source CN.

FIG. 3 is a flowchart of a method for implementing fast relocation in the present invention. As shown in FIG. 3, the specific processing procedure of the fast relocation implementation method 2 includes the following steps:

Steps 301 to 302 are the same as steps 201 to 202.

Step 303 to step 304: After receiving the radio resource response, the source radio access controller sends a relocation request command to the CN; and starts timing when the relocation request command is sent to the CN, and delays the set time interval, and the source wireless The access controller sends a handover command to the UE. The field source radio access controller to the target radio access controller information of the relocation request command includes a relocation identification number, and the relocation request command further carries a UE identifier and a target cell identifier. The switching command carries radio resource information allocated to the UE in the target cell.

The length of time for setting the time interval can be based on empirical statistics. For example, the source radio access controller sends a relocation request command to the CN to receive a relocation command from the CN, and the source radio access controller sends a handover command to the UE to the target radio access controller to receive the UE. The time interval of the handover completion message, the absolute time difference between the two time intervals is taken as the set time interval; for example, the time length of the set time interval is configured according to the convention; for example, according to the empirical value of the relocation test configuration setting The length of time interval. The length of time described above can be zero or other positive numbers.

Step 305: In time sequence, the target radio access controller first receives the handover complete message sent by the UE, and then waits to receive the relocation message from the CN, compared to the time when the relocation message from the CN is received.

Step 306 is the same as step 205. Step 307: After receiving the relocation message, the target radio access controller extracts a relocation identification number from the field source radio access controller to the target radio access controller information, and allocates the relocation identification number to the UE according to the relocation identification number. The resource between the radio access controller and the CN is associated with the radio resource allocated for the corresponding UE, and then responds to the CN with a relocation confirmation message. The resource between the radio access controller and the CN may be allocated by the CN to the UE. When the CN is allocated, the CN may notify the target radio access controller of the radio access controller allocated by the UE to the UE through the relocation message. The resource may also be allocated by the target radio access controller to the UE after the target radio access controller receives the relocation message.

Step 308: Since the target radio access controller has received the handover complete message from the UE, after receiving the relocation acknowledgement message, the relocation complete instruction is sent to the CN.

Step 309 is the same as step 207.

Step 310 to step 311 are the same as steps 210 to 211.

Steps 308 and 309 may have no obvious front-to-back order in time, and may be performed simultaneously or in tandem.

The target radio access controller detects the access signal of the UE, and after receiving the relocation message in step 306, if the UE has been detected to be in the designated radio channel access, or after detecting that the UE is connected on the designated radio channel, In, the target radio access controller sends a relocation detection message to the CN.

After receiving the relocation request command in step 303, the CN determines whether the current relocation is a relocation within the CN or a relocation between the CN according to the target cell identity. If the current relocation is a relocation within the CN, the subsequent processing is exactly the same as that depicted in Figure 3. If the current relocation is a relocation between the CNs, the subsequent specific processing is substantially the same as the description at the end of FIG. 2, and details are not described herein again.

4 is a schematic diagram of a relocation process in a circuit switched (CS) domain system of a Universal Mobile Telecommunications System (UMTS) according to the present invention; In this example, the target RNC and the source RNC belong to the same CN, and in a specific process, the target RNC first receives the relocation request message from the CN, and then receives the handover complete message from the UE. As shown in FIG. 4, the specific processing process for implementing fast relocation includes the following steps:

Step 401 to step 402: The UE successfully establishes a CS service in the cell 1 of the source RNC. After the UE moves, the source RNC determines that the relocation of the UE needs to be initiated according to the measurement report of the UE, and selects the cell 2 of the target RNC as the target cell. The source RNC sends a radio resource request to the target RNC through the IUR interface, and requests the cell 2 to allocate radio resources to the UE. The radio resource request carries information such as the UE identifier, the current service type of the UE, and the identifier of the cell 2. The specific content carried in the wireless resource request transmitted between the RNCs is shown in Table 1.

Table 1

Step 403: After receiving the radio resource request, the target RNC allocates radio resources to the UE in the cell 2, and allocates a relocation identification number identifying the radio resource to the UE, and then responds to the radio resource response to the source RNC through the IUR interface. The response carries the UE identifier, the radio resource information allocated to the UE, and the relocation identification number, and may further carry information such as the identifier of the cell 2. The specific content carried in the radio resource response transmitted between the RNCs is shown in Table 2.

Table 2

Step 404 to step 405: After receiving the radio resource response, the source RNC sends a relocation to the CN. The request message; and, when the relocation request message is sent from the CN, the source RNC sends a 3G handover command message to the UE after the set time interval is delayed.

The source RNC To Target RNC Transparent Container includes a relocation identification number, and the relocation request message further carries a UE identifier and a cell 2 identifier. The 3G handover command message carries radio resource information allocated by the cell 2 to the UE.

The set time interval is configured based on the empirical value of the relocation test, such as 500ms, 0ms or other values.

Table 3 shows the specific contents of the field source RNC to Target RNC Transparent Container.

Field element

RRC Container ( RRC Container )

Number of Iu Instances

Relocation Type

Chosen Integrity Protection Algorithm (Multi-Rate configuration information) Relocation Identifier

table 3

Step 406: After receiving the relocation request message, the CN determines, according to the identifier of the cell 2, that the current relocation is a relocation within the CN, and then allocates a resource between the target RNC and the CN, and sends a weight to the target RNC according to the identifier of the cell 2. a positioning request message, where the relocation request message carries a UE identifier and a relocation identification number, where the relocation identification number is included in the tunnel source RNC to the target RNC transparent transmission information, and the relocation request message further carries the UE assignment Resources between RNC and CN.

Step 407: In time sequence, the target RNC first receives the relocation request message from the CN, and extracts the relocation identification from the field source RNC to the target RNC transparent transmission information, compared with the time when the handover completion message received by the UE is received. No., according to the relocation identification number, will be relocated in the request message The carried resource between the RNC and the CN allocated to the UE is associated with the radio resource allocated for the corresponding UE, and then responds to the CN with a relocation request acknowledgement message.

Step 408: After receiving the relocation request acknowledgement message, the CN sends a relocation command message to the source RNC.

Step 409: After receiving the 3G handover command message from the source RNC, the UE performs handover according to the radio resource information allocated by the cell 2, and after the handover is completed, responds to the handover completion message to the target RNC.

Step 410: After receiving the handover complete message, the target RNC sends a relocation complete message to the CN.

Step 411~Step 412: After receiving the relocation complete message, the CN sends an IU release command message to the source RNC. After receiving the IU release command message, the source RNC releases the relevant resources used by the UE, and then responds to the CN with the IU release completion message.

The target RNC detects the access signal of the UE. After receiving the relocation request message in step 406, if the UE has detected that the UE is accessing the specified radio channel, or after detecting that the UE is accessing the specified radio channel, the target is detected. The RNC sends a relocation detection message to the CN.

FIG. 5 is a schematic diagram of a relocation process between a UMTS and a global system for mobile communication system (GSM) in the CS domain system according to the present invention. In this example, the target BSC and the source RNC belong to different CNs, and In the process, the target RNC first receives the handover complete message from the UE, and then receives the relocation request message from the CN. As shown in Figure 5, the specific process of implementing fast relocation includes the following steps:

Step 501 to step 502: The UE successfully establishes the CS service in the cell 1 of the source RNC. After the UE moves, the source RNC determines that the relocation of the UE needs to be initiated according to the measurement report of the UE, and selects the cell 2 of the target BSC as the target cell. The source RNC sends a radio resource request to the target BSC through the IUR-G interface, and requests the cell 2 to allocate a radio resource to the UE, where the radio resource request carries information such as the UE identifier, the current service type of the UE, and the identifier of the cell 2. Between RNC and BSC The specific content carried in the sent radio resource request is shown in Table 4.

Table 4

Step 503: After receiving the radio resource request, the target BSC allocates radio resources to the UE in the cell 2, and allocates a relocation identification number identifying the radio resource to the UE, and then responds to the source RNC with the radio resource response through the IUR-G interface. The radio resource response carries the UE identifier, the radio resource information allocated to the UE, and the relocation identification number, and may further carry information such as the cell 2 identifier. The specific content carried in the radio resource response transmitted between the BSC and the RNC is shown in Table 5.

table 5

Step 504~ Step 505: After receiving the radio resource response, the source RNC sends a relocation request message to the CN, and simultaneously sends a 2G handover command message to the UE.

The relocation request message includes a UE identifier and a cell 2 identifier. The relocation request message further includes a UE identifier and a cell 2 identifier. The 2G handover command message carries radio resource information allocated by the UE in the cell 2.

The specific content contained in the old BSS to New BSS information is shown in Table 6.

Extra information

Current Channel Type 2 ( Current Channel Type 2 )

Target cell radio information

GPRS Suspend information

MultiRate configuration information Relocation Identifier

Table 6

Step 506: In time sequence, the target BSC first receives the handover complete message of the UE response, and then waits to receive the handover request message from the CN, compared with the time when the handover request message from the CN is received.

Step 507: After receiving the relocation request message, the CN determines that the current relocation is a relocation between the CNs according to the identifier of the cell 2. The CN is the source CN. Therefore, the source CN provides the target CN with the relocation identification number. The field old BSC to the new BSC information, the target CN sends a handover request message to the target BSC according to the cell 2 identifier, where the handover request message carries the UE identifier and the relocation identification number, and the relocation identification number is used by the field old BSC to the new BSC information. contain.

Step 508: After receiving the handover request message, the target BSC allocates resources between the BSC and the CN, and extracts a relocation identification number from the old BSC to the new BSC information, according to the weight.

The response request confirmation message is then responded to the target CN.

Step 509: Since the target BSC has received the handover complete message from the UE, after receiving the handover request message, the handover completion message is sent to the target CN.

Step 510: After receiving the handover request acknowledgement message, the target CN sends the redirection command message to the source RNC, and the source CN sends a relocation command message to the source RNC.

Step 511 to step 512: The source CN sends an IU release command message to the source RNC. After receiving the IU release command message, the source RNC releases the related resources used by the UE, and then responds to the source CN with an IU release complete message. The target BSC detects the access signal of the UE. After receiving the handover request message in step 507, if the UE has detected that the UE is in the designated radio channel access, or after detecting that the UE is in the designated radio channel access, the target BSC A relocation detection message is sent to the target CN.

6 is a schematic structural diagram of a processing system in a fast relocation according to the present invention. As shown in FIG. 6, the system includes: a source radio access controller, a target radio access controller, and a CN, where the target radio access controller is used. Allocating a radio resource to the UE, and assigning a relocation identification number identifying the radio resource to the UE, sending a radio resource response carrying the relocation identification number to the source radio access controller, and according to the relocation identification number from the CN The resource between the radio access controller allocated to the UE and the CN is associated with the radio resource allocated for the corresponding UE; the source radio access controller is configured to receive the radio resource response from the target radio access controller, and The relocation identification number is transmitted to the CN by a relocation request command; the CN is configured to transmit the relocation identification number to the target radio access controller by using a relocation message.

The CN is further configured to allocate resources between the radio access controller and the CN to the UE; or the target radio access controller is further configured to allocate resources between the radio access controller and the CN for the UE.

The radio access controller may be an RNC in a 3G mobile communication system or a BSC in a 2G mobile communication system.

The source radio access controller has a logical interface with the target radio access controller, and the logical interface is an IUR interface between the RNCs in the 3G mobile communication system, or an IUR-G interface between the BSCs in the 2G mobile communication system, Or an IUR-G interface between the 3G mobile communication system RNC and the 2G mobile communication system BSC.

When receiving the handover complete message from the UE, the target radio access controller has not received the relocation message from the CN, and the target radio access controller is further configured to wait to receive the relocation message from the CN, and receive the heavy After the message is located, a relocation confirmation message is sent to the CN.

The relocation request instruction and the relocation message include at least: a field containing a relocation identification number, where the source radio access controller to the target radio access controller information. Source wireless access control The device-to-target radio access controller information is information from the RNC to the target RNC transparent transmission information, or the old BSS to the new BSS.

The target radio access controller is further configured to detect an access signal of the UE, and after detecting that the UE accesses, send a relocation detection message to the CN.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for resource association in relocation, characterized in that, when a user equipment (UE) needs to perform relocation, the method includes:

The method according to claim 1, wherein the determining process that the UE needs to perform relocation includes:

3. The method of claim 1 wherein:

The method according to claim 3, wherein the set time interval is: a time interval at which the source radio access controller sends a relocation request command to the CN to receive a relocation command from the CN, and The absolute time difference between the time interval at which the source radio access controller sends the handover command to the UE to the target radio access controller receiving the handover complete message from the UE; or the length of time configured according to the empirical value of the relocation test.

The method according to any one of claims 1 to 4, wherein the relocation request instruction and the relocation message at least include: a field containing a relocation identification number, where the field is source wireless access Controller to target wireless access controller information.

The method according to claim 5, wherein the resource between the radio access controller and the CN allocated to the UE according to the relocation identification number is associated with the radio resource allocated for the corresponding UE, specifically The method includes: extracting, from the field source radio access controller to the target radio access controller information, a relocation identification number, where the resource between the radio access controller and the CN allocated to the UE is corresponding according to the relocation identification number The radio resources allocated by the UE are associated.

The method according to claim 5, wherein the source radio access controller to target radio access controller information is: a source radio network controller (RNC) to a target RNC transparent transmission information; or Information from the old base station subsystem (BSS) to the new BSS.

A resource association system in a relocation, the system comprising: a source radio access controller, a target radio access controller, and a CN, where

The target radio access controller is configured to allocate a radio resource to the UE, and allocate a relocation identification number identifying the radio resource to the UE, and send a radio resource response carrying the relocation identification number to the source radio access controller, and receive the radio resource response. When the relocation message from the CN is based on the relocation message The relocation identification number associates a resource between the radio access controller and the CN allocated to the UE with a radio resource allocated for the corresponding UE;

9. The system of claim 8 wherein:

10. A system according to claim 8 or claim 9 wherein:

The system according to claim 10, wherein the source radio access controller to target radio access controller information is: source RNC to target RNC transparent transmission information; or, old BSS to new BSS information.