WO2011038553A1

WO2011038553A1 - Method and terminal device for mobility management

Info

Publication number: WO2011038553A1
Application number: PCT/CN2009/074346
Authority: WO
Inventors: 陈中平
Original assignee: 华为技术有限公司
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2011-04-07
Also published as: CN102100114A; CN102100114B

Abstract

A method and a device for mobility management relating to the wireless communication field are provided by the embodiment of the present invention. Said method includes: initiating a first registration update process to Voice over LTE via Generic Access (VoLGA) Access Network Controller (VANC) when a terminal device moves from Global System for Mobile Communications / Enhanced Data Rate for GSM Evolution Radio Access Network (GERAN) / Universal Mobile Telecommunications System Territorial Radio Access Network (UTRAN) to Evolved UMTS Territorial Radio Access Network (E-UTRAN), wherein the said terminal device is in the state of VoLGA registration; acquiring the information of Circuit Switch (CS) domain location by the first registration update process. Said device includes a terminal device and a corresponding access network controller. By the present invention, UE can perceive the change of the CS domain location information and initiate a Location Area Update (LAU) process when the access network changes, thereby the call service failure caused by the imperceptibility of the change of the CS domain location information can be avoided and the user experience can be enhanced.

Description

Description A method and terminal device for mobility management

The present invention relates to the field of wireless communications, and in particular, to a method and a terminal device for mobility management. Background technique

In order to meet the challenges of wireless broadband technology and maintain the leading edge of 3GPP (3rd Generation Partnership Project), the 3GPP organization has developed the LTE (Long Term Evolution) program. This long-term evolution plan only retains the packet domain, so it is also called EPS (Evolved Packet System). The core network of the EPS network mainly includes three logical functions: 匪E (Mobiity Management Entity), Serving Gateway (S-GW, Serving Gateway), PDN Gateway (P-GW, Packet Data Gateway). The MME is a mobility management entity, responsible for NAS signaling and NAS signaling encryption, roaming, tracking, etc., assigning user temporary identity, security functions, etc., corresponding to the current UMTS (Universal Mobi le Telecommunications System) The control plane part of the internal SGSN (Serving GPRS Support Node); the S-GW is responsible for the local mobility anchor and the mobility anchor within the 3GPP system and the lawful interception related information; the P-GW is responsible for the policy The access network of the evolved network is E-UTRAN (Evolved UMTS Territorial Radio Access Network).

The CS (Circuit Switch) domain mainly processes voice services, and the CS domain signaling plane control entity is MSC.

(Mobi le Switching Center, Mobile Switching Center) /VLR (Visiting Location Register). In order to re-use the existing CS service in the LTE network, a VoLGA (Voice over LTE via Generic Access) network architecture is proposed, which is through the VANC (VoLGA Access Network Controller, VoLGA access network controller). ) Connect the EPS network to the CS domain core network.

In the prior art, when a UE (User Equipment) moves between the E-UTRAN network and the GERAN/UTRAN network, the UE needs to perform RAU (Routing Area Update) or TAU due to the change of the access network. (Tracking Area Update) The location update process, that is, the mobility management process of the PS (Packet Switch) domain.

In the prior art, when the UE completes registration in the CS domain, the UE may listen to the current CS domain location information, such as LA (Location Area) information, from the broadcast message of the access network, if the LA information is monitored. With the UE The stored LA information is inconsistent, and the UE initiates the LAU process. In addition, when the MSC receives a called service, the MSC will page the UE in the location area according to the currently recorded UE location area information.

In the VOLGA architecture, when the UE resides on the LTE network, the location information of the cs domain (such as LA) cannot be obtained. Therefore, the location information of the CS domain cannot be changed. This may cause paging failure and affect the user experience. Summary of the invention

In order to be able to perceive the location information of the CS domain in the LTE network, the embodiment of the present invention provides a mobility management method and a terminal device. The technical solution is as follows:

A method of mobility management, the method comprising:

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, initiates a first registration update process to the VANC, and the terminal device is in a VOLGA registration state;

The cs domain location information is obtained through the first registration update process.

A method of mobility management, the method comprising:

Receiving a first registration update procedure initiated when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, where the terminal device is in a VOLGA registration state;

Obtaining circuit switched CS domain location information by using the first registration update process;

Sending the CS domain location information to the terminal device.

A terminal device, where the terminal device includes:

a registration update module, configured to initiate a first registration update process to the VANC when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, where the terminal device is in a VoLGA registration state;

a location obtaining module, configured to obtain CS domain location information by using the first registration update process.

An access network controller, the controller includes:

a receiving module, configured to receive a first registration update process initiated when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, where the terminal device is in a VOLGA registration state;

a location obtaining module, configured to obtain circuit switched CS domain location information by using the first registration update process, and a sending module, configured to send the CS domain location information to the terminal device.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

When the access network changes, the UE in the registration state initiates a registration update process to the VANC, and obtains the CS domain location information of the current network, so that the UE can sense the change of the CS domain location information when the access network changes. The LAU process is initiated, thereby avoiding the failure of the call service due to the inability to perceive the change of the CS domain location information, thereby enhancing the user experience. DRAWINGS

1 is a flowchart of a method for mobility management according to Embodiment 1 of the present invention;

2 is a flowchart of a method for mobility management according to Embodiment 2 of the present invention;

3 is a flowchart of a method for mobility management provided by Embodiment 3 of the present invention;

4 is a flowchart of a method for mobility management according to Embodiment 4 of the present invention;

5 is a flowchart of UE paging provided by Embodiment 4 of the present invention;

6 is another flowchart of UE paging provided by Embodiment 4 of the present invention;

7 is a schematic structural diagram of a terminal device according to Embodiment 5 of the present invention;

8 is another schematic structural diagram of a terminal device according to Embodiment 5 of the present invention;

9 is a schematic structural diagram of an access network controller according to Embodiment 6 of the present invention;

FIG. 10 is another schematic structural diagram of an access network controller according to Embodiment 6 of the present invention. detailed description

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

Example 1

Referring to FIG. 1, this embodiment provides a mobility management method, where the method includes:

S11: When the terminal device is from GERAN (Global System for Mobi Le Communications/Enhanced Data Rate for GSM Evolution Radio Access Network, Global System for Mobile Communications/Enhanced Data Rate Global System for Mobile Communications, Radio Access Network) / UTRAN (Universal Mobi le Telecommunications System Territorial Radio Access Network, when the network moves to the E-UTRAN network, initiates a first registration update process to the VANC, and the terminal device is in the VoLGA registration state;

The first registration update process is initiated to the VANC, and the method includes: the terminal device sends a first registration update message to the VANC, where the first registration update message carries the EPS location information of the E-UTRAN network.

The registration update process initiated by the E-UTRAN network in this embodiment is referred to as a first registration update process. In the first registration update process, the uplink registration update message carries the EPS location information, and the VANC needs to be converted into the CS domain location information, and the downlink registration update message is returned to the UE. The EPS location information may be information such as TAI (Tracking Area Identity Tracking Area Identity), ECGI (E-UTRAN Cel l Identity E-UTRAN Cell Identity).

Specifically, when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, the first registration update process is initiated to the VANC, including: When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network and determines that the ISR (Idle mode Signaling Reduction) activation state is ISR inactive, the first registration update process is initiated to the VANC; or ,

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, it is determined that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, the first registration update process is initiated to the VANC. Or,

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, it is determined that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, it is determined that the last circuit domain information interaction process occurs in GERAN. / UTRAN network, initiate the first registration update process to the VANC; or

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, it is determined that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, it is determined that the last circuit domain information interaction process occurs in the E - The UTRAN network does not initiate the first registration update procedure to the VANC.

S12: Obtain CS domain location information by using the first registration update process.

The CS domain location information mainly refers to LAI (Location Area Identity) information.

Specifically, the CS domain location information sent by the VANC is received, and the CS domain location information is obtained by the VANC according to the EPS location information.

Further, by acquiring the location information of the CS domain, if the location information of the CS domain is changed, the process of updating the location area of the LAUaocation Area Update is initiated.

The method provided in this embodiment, when the UE in the registration state changes in the access network, initiates a registration update process to the VANC, and obtains the CS domain location information of the current network, so that the UE can change when the access network changes. The change of the location information of the CS domain is sensed, and the LAU process is initiated, thereby avoiding the failure of the call service caused by the inability to sense the change of the location information of the CS domain, and enhancing the user experience. Example 2

Referring to FIG. 2, this embodiment provides a mobility management method, including:

S21: The first registration update process initiated when the receiving terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, and the terminal device is in a VOLGA registration state;

Specifically, the first registration update message sent by the receiving terminal device when moving from the GERAN/UTRAN network to the E-UTRAN network, where the first registration update message carries the evolved packet network EPS location information of the E-UTRAN network.

S22: Obtain, by using the first registration update process, location information of the circuit switched CS domain.

Specifically, the corresponding CS domain location information is obtained according to the EPS location information in the first registration update process. S23: Send the CS domain location information to the terminal device.

The method provided in this embodiment obtains the circuit-switched CS domain location information by using the first registration update process by the first registration update process sent when the UE in the registration state moves from the GERAN/UTRAN network to the E-UTRAN network, thereby enabling When the access network changes, the UE can sense the change of the location information of the CS domain, and then initiate the LAU process, which avoids the failure of the call service caused by the inability to sense the change of the location information of the CS domain, and enhances the user experience. Example 3

The embodiment of the present invention provides a mobile management method. When a UE in a VOLGA registration state moves from a GERAN/UTRAN network to an E-UTRAN network, it initiates a registration update process with the VANC to obtain the CS domain location information of the current network. When the access network changes, the UE can sense the change of the CS domain location information and initiate the LAU process. Referring to FIG. 3, the method for mobile management specifically includes:

201: When the UE in the VOLGA registration state moves from the GERAN/UTRAN network to the E-UTRAN network, if

The UE is in an idle state and is transferred to the connected state, including:

201a _{: The} UE sends a TAU Request (Tracking Area Update Request) message or an SR (Service Request) message to the MME.

201b: After receiving the TAU Request message or the SR message, the MME restores the UE to the VANC interaction channel (IP channel), and returns a TAU Accept (Tracking Area Update Accept) message to the UE.

Step 201 is an optional step, if the UE in the VOLGA registration state moves from the GERAN/UTRAN network to

In the E-UTRAN network, if the UE is in the connected state, step 201 is not directly performed, and step 202 is directly performed.

202: When the UE in the VoLGA registration state and the connection state moves from the GERAN/UTRAN network to the E-UTRAN network, that is, when the access system changes, sending a registration update uplink message (first registration update message) to the VANC;

The VOLGA registration status, that is, the GA-RC REGI STERED status, refers to the UE completing the registration process to the VANC. The registration update update message (GA-RC REGISTER UPDATE UPLINK) carries the EPS location information of the current network, such as TAI (Tracking Area Identity) and E-UTRAN Cell Identity.

The VANC has the function of converting the EPS location information into the CS domain location information. Further, the VANC converts the current network EPS location information into the CS domain location information.

203: The VANC returns the registration update downlink message (GA-RC REGISTER UPDATE DOWNLINK) to the UE according to the EPS location information of the current network provided by the UE.

The registration update downlink message includes the CS domain location information.

Further, the VANC according to the EPS location information provided by the UE, if the service cannot be continued for the UE, the VANC The UE returns a registration transfer message; wherein the registration-transfer (GA-RC REGISTER REDIRECT) message contains another VANC address information (VANC address) specified, and the other VANC can continue to serve the UE. Further, after receiving the registration transfer message returned by the VANC, the UE initiates a registration process to another VANC, and may send a registration update uplink message (the first registration update message) to the other VANC, and may refer to the description of steps 202 and 203.

204: The UE receives the LAI information returned by the VANC. If the LAI changes, the UE sends an uplink direct transmission message to the VANC. The GA-CSR UL DIRECT TRANSFER includes the LAU Request sent by the UE to the MSC. Location Area Update Request, Location Area Update Request) message.

If the LAI does not change, the call service may be initiated according to the LAI.

205: The VANC forwards the location area update request message to the MSC;

206: After receiving the location area update request message forwarded by the VANC, the MSC saves the LAI information carried in the message, and sends a LAU Accept (Location Area Update Accept) message to the VANC.

207: After receiving the location area update accept message, the VANC sends a downlink direct transmission message to the UE.

The downlink direct transmission message (GA-CSR DL DIRECT TRANSFER) includes a LAU Accept message sent by the MSC to the UE.

The method provided in this embodiment, when the UE in the registration state moves from the GERAN/UTRAN network to the E-UTRAN network, initiates a registration update process to the VANC, and obtains the CS domain location information of the current network, so that the UE is accessing. When the network changes, the location information of the CS domain may be changed. If the UE initiates the LAU process, the obtained CS domain location information is sent to the MSC. When the subsequent MSC calls the UE, the location of the CS domain cannot be accurately learned. The call service caused by the information failed. Example 4

The embodiment of the present invention provides a mobile management method, which can not only sense the change of the CS domain location information, but also can be compatible with the ISR mechanism. Referring to FIG. 4, the UE accesses the GERAN/UTRAN network from the E-UTRAN network, and then from the GERAN. The scenario where the /UTRAN network returns to the E-UTRAN network is used as an example to describe the process of mobility management, including:

301: The UE accesses the E-UTRAN network, completes registration with the MME, and establishes an IP channel to the VANC. The UE obtains the TAI list information provided by the MME in the process of registering with the MME, and the UE saves the TAI list. Therefore, when the UE moves in the TAI list range, the UE does not trigger the TAU procedure with the MME.

Specifically, the process of the UE establishing the IP channel to the VANC is the process initiated by the UE to establish a VoLGA-related PDN (Packet Data Network) connection.

302: The UE completes registration with the VANC;

The UE completes the registration to the VANC, that is, the UE is in the VoLGA registration state. The VANC may allocate the VANC TAI list and the VoLGA LAI to the UE during the UE registration process with the VANC.

The UE saves the VANC TAI list, and when the UE moves in the VANC TAI list range, the UE does not trigger with the VANC.

VOLGA registration update process.

303: The UE completes registration with the MSC through the VANC;

In the process of the UE registering with the MSC, the MSC allocates the LAI information of the UE's effective location area information to the UE, which is recorded as E-UTRAN-LAI, and the E-UTRAN-LAI information and the VoLGA LAI in step 302. the same.

Further, after the UE completes the registration to the MSC through the VANC, the UE saves the foregoing LAI information.

304: The UE moves from the E-UTRAN network to the GERAN/UTRAN network;

305: The UE senses that the access system changes, and when moving to the coverage area of the GERAN/UTRAN network, sends a location update request (RAU Request) message to the SGSN.

The location update request message may be a RAU Request message or an RA/LA joint update request message.

306: If the UE senses that the currently accessed LAI information is inconsistent with the saved E-UTRAN-LAI, the UE may also send a separate location update procedure of the MSC;

The LAI information is learned from the broadcast information of the network element of the access network.

The process of updating the MSC initiated by the UE may be an LAU process. After completing the UE-initiated update procedure to the MSC, the MSC re-records the location information of the UE. To distinguish from the E-UTRAN-LAI in step 303, the location information of the UE is defined as GERAN/UTRAN-LAI, and the MSC will The GERAN/UTRAN-LAI information covers or replaces the previously saved E-UTRAN-LAI information. On the other hand, if the UE accesses the E-UTRAN network from the GERAN/UTRAN network and activates the ISR, the E-UTRAN-LAI information is overwritten or replaced with the GERAN/UTRAN-LAI information previously saved by the MSC.

Further, since the RA and the LA have a certain correspondence relationship, the RA update and LA update processes may be initiated in steps 305 and 306, respectively, or the RA/LA joint update process may be initiated in one step.

307: The SGSN interacts with the MME of the serving UE in the E-UTRAN network to obtain the ISR capability information of the MME. The ISR capability information indicates whether the MME supports the ISR mechanism.

308: The SGSN selects an activation state of the ISR according to its own capability and ISR capability information of the MME of the serving UE in the E-UTRAN network, and sends a location update response message to the UE.

The location update response message includes RAI information provided by the SGSN to the UE, and may further include ISR information. The ISR message is used to indicate the ISR activation status (ISR activation / ISR inactive). When the ISR is activated, when the UE moves between the RA of the recorded GERAN/UTRAN network and the TA of the E-UTRAN network, the UE does not trigger the mobility management process of the PS domain, such as the RAU process or the TAU process.

Further, in step 304, after the UE moves from the E-UTRAN network to the GERAN/UTRAN network, it is also required to make

The UE maintains the VoLGA registration status. This embodiment provides an ISR activation state according to step 308, by setting The method of deregistering the timer to maintain the VOLGA registration state (see methods one, two, and three). Of course, this embodiment does not limit the specific method of maintaining the VOLGA registration state.

When the UE camps on the VOLGA-based E-UTRAN network, the VANC allocates a de-registration timer to the UE, and the de-registration timer is used to trigger the UE to initiate a de-registration procedure to the VANC. For example, in the registration process or registration update process performed by the UE to the VANC, the message sent by the VANC to the UE carries a deregistration timer "deregister on rove-out" ₀ when the UE operates in the VoLGA working mode, that is, the CS domain service wireless The resource entity is GA-CSR (Generic Access - Circuit Switched Resources) (VoLGA A mode) or GA-RRC (Generic Access - Radio Resource Control) (VoLGA Iu) In the mode), the UE does not need to start the timer. When the UE's CS domain serving radio resource entity moves from GA-CSR or GA-RRC to Ij GERAN RR (Radio Resource) or UTRAN RRC (Radio Resource Control), for example, at GA-RC REGISTERED The UE in the state accesses the GERAN/UTRAN network from the E-UTRAN network, the access system changes, and the UE starts the timer. When the UE camps on the GERAN/UTRAN network and the timer expires (or overflows), the UE initiates a deregistration procedure to the VANC.

This embodiment provides three specific processing methods by setting a deregistration timer to maintain the VOLGA registration status.

In the first method, the trigger condition for starting the registration timer is an access network change, including:

The UE accesses the GERAN/UTRAN network from the EUTRAN, and the access system changes. The UE transfers the CS domain serving radio resource entity from the GA-CSR or the GA-RRC to the GERAN RR or the UTRAN RRC, and the UE starts the deregistration timer, and the network side Go to the registration timer to set a maximum duration;

Before the maximum duration is reached (that is, when the deregistration timer does not overflow), if the UE receives the indication that the network side activates the ISR, the UE stops the deregistration timer, that is, the UE continues to maintain the VOLGA registration state;

Before the maximum duration is reached, if the UE receives the indication that the network does not activate the ISR, the UE continues to maintain the deregistration timer, that is, the UE continues to maintain the VOLGA registration state; if the maximum duration is reached (ie, when the deregistration timer overflows), then The UE performs a deregistration process.

In the second method, the trigger condition for starting the registration timer is the ISR activation status that is perceived after the access network changes, including:

The UE accesses the GERAN/UTRAN network from the EUTRAN, the access system changes, and the UE sets the CS domain service radio resource entity from

The GA-CSR or the GA-RRC is transferred to the GERAN RR or the UTRAN RRC, and the UE does not start the deregistration timer;

If the subsequent sensing ISR is activated, for example, receiving the indication that the SGSN sends the ISR activation, the UE does not start the deregistration timer;

If the subsequent sensing ISR is not activated, for example, receiving an indication that the ISR is not activated by the SGSN, the UE starts the deregistration timer. Method three, according to the change of the access network, the deregistration timer is terminated and reset to zero, including:

The UE accesses the GERAN/UTRAN network from the EUTRAN, and starts the deregistration timer. The network side sets the maximum duration of the periodic update timer that is longer than the UE saves (the periodic update timer duration in the E-UTRAN network or the GERAN/UTRAN network) The duration of the periodic update timer) and the duration of the timer of the deactivated ISR saved by the UE;

Before the deregistration timer does not overflow, when the UE returns from the GERAN/UTRAN network to the EUTRAN network, the deregistration timer is terminated and reset to zero.

Combining the above three methods, when the UE in the GA-RC REGISTERED state accesses the GERAN/UTRAN network from the E-UTRAN network, the GA-RC REGISTERED state can be continuously selected regardless of whether the ISR is activated, and the deregistration process does not need to be performed to the VANC. . In addition, the GA-CSR or the GA-RRC, and the GERAN RR or the UTRAN RRC, can serve as the serving radio resource entity of the UE at the same time. In this case, the UE can handle both the interaction with the VANC and the GERAN/ Interaction between network elements of the access network of the UTRAN network, for example, interaction with a BSS (Base Station Subsystem) / RNC (Radio Network Controller).

309: The UE in the VoLGA registration state senses that the CS domain location information is changed, and sends a registration update uplink message (the second registration update procedure) to the VANC;

This embodiment refers to the registration update process initiated by the GERAN/UTRAN network as the second registration update process. The difference from the first registration update process is that the uplink registration update message in the second registration update process carries location information of the GERAN/UTRAN network, for example, RAI or LAI information.

The GA-RC REGISTER UPDATE UPL (IN) message carries the location information of the current GERAN/UTRAN network, for example, RAI, LAI, CI, and the like.

310: The VANC, according to the location information provided by the UE, if the service can be continued for the UE, the VANC returns a registration update downlink message (GA-RC REGISTER UPDATE DOWNLINK) to the UE;

311: The VANC returns the registration transfer message to the UE according to the location information provided by the UE, if the service cannot be continued for the UE;

The GA-RC REGISTER REDIRECT (VANC address) message contains address information of another VANC that can serve the UE.

Further, after the VANC replies to the UE with the registration transfer message, the UE initiates a registration procedure to the other VANC. 312: When the UE returns from the GERAN/UTRAN network to the EUTRAN network, if the ISR is activated, the UE chooses not to perform the registration update procedure with the VANC; otherwise, if the ISR is not activated, the UE performs a registration update procedure with the VANC. Based on the above steps 301-312, the UE is already in the EUTRAN network. When the access network in step 312 is changed, if the UE is in the ISR activation state, the paging service (calling/called) of the UE needs to be resolved. problem. Because UE At this time, it may be in E-UTRAN-LAI, and the UE location information recorded in the MSC is GERAN/UTRAN_LAI, and the two location information may be different. In the following, the embodiments of the present invention are described in two scenarios. The first one is when there is an associated Gs interface between the SGSN and the MME, and the second is when there is no associated Gs interface between the SGSN and the MME, the Gs The interface is established by the UE performing a joint RA/LA procedure on the GERAN/UTRAN network.

Referring to FIG. 5, for the first application scenario, the method for solving the paging problem of the UE specifically includes:

401: G-MSC (GATE WAY-MSC, Mobile Network Gateway) sends an IAM (Initial Address Message) to the MSC.

402: The MSC sends a paging message to the SGSN that establishes the Gs association by using the Gs interface, where the paging message indicates a CS Paging message.

403: The SGSN sends a paging message to the UE through the GERAN/UTRAN network, where the paging message indicates the CS domain paging.

(CS Paging) message.

404: The SGSN forwards the paging message to the MME with which the ISR is associated.

405: The MME receives the paging message, and triggers paging of the UE in the E-UTRAN network.

406: In the ISR activation state, the UE camps on the E-UTRAN network, and the UE receives the paging message and sends an EPS Service Request message to the MME.

407: Perform a User Plan Setup process for data transmission between the UE and the S-GW.

408: The UE learns that there is a called service in the CS domain, and the UE sends a registration update uplink message to the VANC.

The GA-RC REGISTER UPDATE UPLINK message carries the location information of the current EPS network (for example, TAI, E-UTRAN CI). The VANC converts the EPS location information into CS domain location information.

In addition, when the UE actively initiates paging services on the E-UTRAN network, including MO Service (Mobile Originating)

When the service start call service (Mobile Terminating Service), if the ISR is in the active state, the UE also needs to perform the registration update process with the VANC first, that is, the UE sends a registration update uplink message (GA-RC). REGISTER UPDATE UPLINK) to VANC.

Further, some optimizations may be performed on the basis of: ISR activation, when the UE in the VOLGA registration state initiates a service in the E-UTRAN (including the M0 service and the MT service), if the data or the last time is sent to the circuit domain, The order (ie, interacting with the MSC) is performed in the GERAN/UTRAN network, then the UE needs to perform the registration update procedure with the VANC first; if the last time the data is sent to the circuit domain or the signaling (ie interacting with the MSC) is in the E-UTRAN Performed in the network, then the UE does not need to perform the registration update process with the VANC.

409: If the VANC can continue to provide services for the UE, the VANC replies to the UE with a registration update downlink message.

Wherein, the registration update downlink (GA-RC REGISTER UPDATE DOWNLINK) message includes LAI (Location

Area Identification, Location Identification. 410: If the VANC cannot continue to provide services for the UE, the VANC returns a registration transfer message to the UE. Wherein, the registration transfer (GA-RC REGISTER REDIRECT (VANC address)) message may be

Address information of another VANC served by the UE.

411: The UE initiates a registration process to another designated VANC.

412: The UE sends a LAU process to the MSC through the VANC according to the LAI information provided by the VANC.

413: The UE returns a Paging Response message to the VANC according to the LAI information provided by the VANC, if the LAI is not changed.

414: The VANC forwards the Paging Response message to the MSC.

415: After the UE re-registers with the MSC, the call flow can be performed between the UE and the MSC. Referring to FIG. 6, for the second application scenario, the method for solving the paging problem of the UE specifically includes:

501: The G-MSC (GATE WAY-MSC) sends an IAM (Initial Address Message) to the MSC.

502a: The MSC sends a CS domain paging message to the access network element BSS/RNC corresponding to the current LA area, and the access network element corresponding to the LAI saved by the current MSC in the GERAN/UTRAN network (2G/3G network) Receiving a CS domain paging message sent by the MSC;

502b: The GERAN/UTRAN network (2G/3G network) sends a CS domain paging message to the UE.

503: The MSC sends a CS domain paging message to the VANC of the serving UE.

Specifically, the method for the VANC of the serving UE to receive the paging message sent by the MSC is the processing of 309-311, and the steps 309-311 enable the VANC to always serve the UE at the current location.

504: The VANC forwards the received paging message to the P-GW (Packet Gateway) associated with the IP packet, and the P-GW forwards the IP packet carrying the CS domain paging message to the S-GW. (Service Gateway).

505: In the ISR activation state, the S-GW sends a Down data data notification (Downl Ink Data Notification) message to the SGSN according to the saved SGSN address.

506: After receiving the downlink data notification message, the SGSN pings the UE (PS domain paging message) through the GERAN/UTRAN network (2G/3G network).

507a: In the ISR activation state, the S-GW sends a downlink data notification message to the 匪E according to the saved MME address. 507b: After receiving the downlink data notification message, the MME pages the UE (PS domain paging message) through the -UTRAN network. 508: In the ISR activation state, the UE camps on the E-UTRAN network, and the UE receives the paging message and sends an EPS service request message to the MME. 509: Perform a user plane establishment process for data transmission between the UE and the S-GW.

510: The S-GW forwards the IP data packet including the paging message sent by the MSC to the UE.

511: After receiving the IP data packet, the UE learns that the MSC sends a paging message to the MSC (that is, the called service in the CS domain is known). In the ISR activation state, the UE sends a registration update uplink message to the VANC.

The GA-RC REGISTER UPDATE UPLINK message carries the location information of the current EPS network (for example, TAI, E-UTRANCI). The VANC converts the EPS location information into CS domain location information.

In addition, when the UE in the VOLGA registration state actively initiates the service (including the MO service and the MT service) on the E-UTRAN network, if the ISR is activated, the UE also needs to perform the registration update process with the VANC first, that is, the UE sends the registration update uplink. Message (GA-RC REGISTER UPDATE UPLINK) to VANC.

Further, when the ISR is activated, the UE in the VOLGA registration state initiates the service (including the M0 service and the MT service) when the E-UTRAN initiates the transmission of data or signaling (ie, interacts with the MSC) to the circuit domain. In the GERAN/UTRAN network, the UE needs to perform the registration update procedure with the VANC first; if the last time data or signaling is sent to the circuit domain (ie, interact with the MSC) is performed in the E-UTRAN network, then the UE does not Need to perform the registration update process with VANC.

512: The VANC may continue to provide services for the UE, and the VANC returns a registration update downlink message to the UE.

The message of the registration area update (GA-RC REGISTER UPDATE DOWNLINK) includes LAI (Location Area Identification) information.

513: The VANC cannot continue to provide services for the UE, and the VANC replies to the UE with a registration transfer message;

The GA-RC REGISTER REDIRECT (VANC address) message contains another VANC address information that can serve the UE.

514: The UE initiates a registration process to the another VANC.

515: The UE sends a LAU process to the MSC through the VANC according to the LAI information provided by the VANC, if the LAI changes;

516: The UE returns a Paging Response message to the VANC according to the LAI information provided by the VANC if the LAI has not changed.

517: The VANC forwards the Paging Response message to the MSC.

518: After the UE re-registers with the MSC, the call procedure can be performed between the UE and the MSC.

In the method of the embodiment of the present invention, when the UE accesses the GERAN/UTRAN network from the E-UTRAN network, the VOLGA registration state is maintained by setting a deregistration timer. When returning from the GERAN/UTRAN network to the E-UTRAN network, the ISR is activated. The status triggers the registration update process, that is, it is compatible with the existing ISR mechanism, and realizes signaling saving in the idle state. At the same time, when the paging service is initiated, the UE can also send the location area information to the MSC, so that the MSC can Paging message Send to the correct location area to ensure that the UE can be paged. Example 5

Referring to FIG. 7, this embodiment provides a terminal device, where the device includes:

a registration update module 601, configured to: when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network,

The VANC initiates the first registration update process, and the terminal device is in the VOLGA registration state;

The location obtaining module 602 is configured to obtain CS domain location information by using a first registration update process.

The registration update module 601 specifically includes:

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, the first registration update message is sent to the VANC, and the first registration update message carries the EPS location information of the E-UTRAN network.

The location obtaining module 602 specifically includes:

The CS domain location information sent by the VANC is received, and the CS domain location information is obtained by the VANC according to the EPS location information. The registration update module 601 specifically includes:

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, the ISR activation state is determined; when the ISR activation state is the ISR is not activated, the first registration update procedure is initiated to the VANC.

Further, referring to FIG. 8, the terminal device further includes:

a determining module 603, configured to determine an ISR activation state when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network;

When the determining module 603 determines that the ISR activation state is that the ISR is not activated, the registration update module 601 initiates a first registration update procedure to the VANC;

Alternatively, when the determining module 603 determines that the ISR activation status is ISR inactive, and in the E-UTRAN network, when the terminal device has a call service, the registration update module 601 initiates a first registration update procedure to the VANC;

Alternatively, when the determining module 603 determines that the ISR activation state is ISR inactive, and in the E-UTRAN network, when the terminal device has a call service, determining that the last circuit domain information interaction process occurs in the GERAN/UTRAN network, the registration update module 601 initiates a first registration update process to the VANC;

Alternatively, when the determining module 603 determines that the ISR activation state is ISR inactive, and in the E-UTRAN network, when the terminal device has a call service, determining that the last circuit domain information interaction process occurs in the E-UTRAN network, the registration update module 601 The first registration update process is not initiated to VANC.

Further, the device further includes: a second registration update module 604, including a registration holding unit 604a and a registration update unit 604b;

Registration holding unit 604a, for moving from the GERAN/UTRAN network to the E-UTRAN network, from E-UTRAN The network moves to the GERAN/UTRAN network to maintain the VoLGA registration status;

The registration update unit 604b is configured to initiate a second registration update process to the VANC to provide location information of the GERAN/UTRAN network.

Wherein, moving from the E-UTRAN network to the GERAN/UTRAN network, the registration holding unit 604a starts the registration timer;

Before the deregistration timer does not overflow, if the ISR activation indication is received, the deregistration timer is terminated; before the deregistration timer does not overflow, if the ISR is not activated, the deregistration timer is maintained; the deregistration timer overflows. At the time, the deregistration process is performed.

Wherein, moving from the E-UTRAN network to the GERAN/UTRAN network, the registration holding unit 604a does not start the deregistration timer;

If an indication that the ISR is not activated is received, the deregistration timer is started;

If an indication of ISR activation is received, the deregistration timer is not started.

Wherein, moving from the E-UTRAN network to the GERAN/UTRAN network, the registration holding unit 604a starts the deregistration timer, and the maximum duration of the deregistration timer is greater than the sum of the duration of the periodic update timer and the duration of the deactivated ISR timer; After the GERAN/UTRAN network moves to the E-UTRAN network, it includes: Terminating and resetting the deregistration timer to zero. Further, after the device obtains the CS domain location information by using the first registration update process, if the location information of the CS domain is changed, the device initiates a location update process.

The terminal device provided in this embodiment is in the same concept as the method embodiment. For details, refer to the method embodiment, and details are not described herein again.

The terminal device provided by the embodiment of the present invention, when the UE in the registration state moves from the GERAN/UTRAN network to the E-UTRAN network, initiates a registration update process to the VANC, and obtains the CS domain location information of the current network. When the access network changes, the UE can sense the change of the location information of the CS domain, and then initiate the LAU process, which avoids the failure of the call service caused by the inability to sense the change of the location information of the CS domain, and enhances the user experience. On the other hand, when the UE moves from the E-UTRAN network to the GERAN/UTRAN network, the VoLGA registration status is maintained by setting a deregistration timer. When returning from the GERAN/UTRAN network to the E-UTRAN network, the registration is triggered by determining the ISR activation status. The update process is compatible with the existing ISR mechanism. When the UE is already in the E-UTRAN network and the ISR is activated, the registration update process is triggered by the paging service of the UE, thereby solving the problem that the UE cannot perceive the CS domain location information. The paging problem caused by the change. Example 6

Referring to FIG. 9, the embodiment provides an access network controller, including: The receiving module 701 is configured to receive a first registration update process that is sent when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, where the terminal device is in a VOLGA registration state;

The location obtaining module 702 is configured to obtain the circuit switched CS domain location information by using the first registration update process, and the sending module 703, configured to send the CS domain location information to the terminal device.

The receiving module 701 is specifically used to

Receiving a first registration update message sent by the terminal device when moving from the GERAN/UTRAN network to the E-UTRAN network, where the first registration update message carries the evolved packet network EPS location information of the E-UTRAN network;

Correspondingly, the location obtaining module 702 is specifically configured to obtain corresponding CS domain location information according to the EPS location information. Further, referring to FIG. 10, the controller further includes: a paging module 704, configured to:

When the terminal device has a call service, the SGSN receives the paging message sent by the MSC, and pages the terminal device through the GERAN/UTRAN network; the SGSN sends the paging message to the MME associated with establishing the ISR, so that the MME is in the E-UTRAN network. Paging terminal equipment.

The access network controller provided in this embodiment is equivalent to the VANC in the method embodiment, and is the same as the method embodiment. For details, refer to the method embodiment, and details are not described herein again.

The controller provided by the embodiment of the present invention, the first registration update process sent when the UE in the registration state moves from the GERAN/UTRAN network to the E-UTRAN network, obtains the circuit domain information of the CS domain through the first registration update process, thereby When the access network changes, the UE can sense the change of the location information of the CS domain, and then initiate the LAU process, which avoids the failure of the call service caused by the inability to sense the change of the location information of the CS domain, and enhances the user experience. Embodiments of the invention may be implemented in software, and the corresponding software program may be stored in a readable storage medium, such as a hard disk, a cache, or an optical disk of a computer. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A method for mobility management, the method comprising:

When the terminal equipment evolves from the Global System for Mobile Communications/Enhanced Data Rate Global System for Mobile Communications, the Radio Access Network/Universal Mobile Telecommunications System, the Terrestrial Radio Access Network, the GERAN/UTRAN Network, to the Evolved Universal Mobile Telecommunications System, Terrestrial Radio Access Network, E In the UTRAN network, the first registration update process is initiated to the voice access access network controller VANC of the normal access long-term evolution, and the terminal device is in the VOLGA registration state of the normal access long-term evolution voice operation;

The circuit switched CS domain location information is obtained through the first registration update process.

2. The method according to claim 1, wherein when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, the first registration update process is initiated to the VANC, including:

Transmitting a first registration update message to the VANC when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, where the first registration update message carries the evolved packet network EPS location information of the E-UTRAN network .

The method of claim 2, wherein the acquiring the CS domain location information by using the first registration update process includes:

Receiving, by the VANC, the CS domain location information, where the CS domain location information is determined by the VANC according to the

EPS location information obtained.

The method according to claim 1, wherein when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, the first registration update process is initiated to the VANC, including:

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network and determines that the idle state saving signaling ISR activation state is that the ISR is not activated, the first registration update procedure is initiated to the VANC; or

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, determining that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, initiating the First registration update process; or

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, it is determined that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, determining the last circuit domain information interaction process Initiating the first registration update process to the VANC when the GERAN/UTRAN network occurs; or

When the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network, it is determined that the ISR activation state is ISR activation, and in the E-UTRAN network, when the terminal device has a call service, determining the last circuit domain information interaction process When the E-UTRAN network occurs, the first registration update procedure is not initiated to the VANC.

5. Method according to claim 1 or 4, characterized in that said moving from a GERAN/UTRAN network to E-UTRAN Before the network includes:

Moving from the E-UTRAN network to the GERAN/UTRAN network, maintaining the VoLGA registration status;

The location information of the GERAN/UTRAN network is sent to the VANC.

6. The method of claim 5, wherein the moving from the E-UTRAN network to the GERAN/UTRAN network, maintaining a VOLGA registration status comprises:

Moving from the E-UTRAN network to the GERAN/UTRAN network, starting a deregistration timer;

Before the de-registration timer does not overflow, if the indication of ISR activation is received, the de-registration timer is terminated; or

Before the deregistration timer does not overflow, if the indication that the ISR is not activated is received, the deregistration timer is maintained.

7. The method of claim 5, wherein the moving from the E-UTRAN network to the

The GERAN/UTRAN network, maintaining the VoLGA registration status includes:

Moving from the E-UTRAN network to the GERAN/UTRAN network does not initiate a deregistration timer;

8. The method of claim 5, wherein the moving from the E-UTRAN network to the

The GERAN/UTRAN network, maintaining registration update status includes:

Moving from the E-UTRAN network to the GERAN/UTRAN network, the deregistration timer is started, and the maximum duration of the deregistration timer is greater than the sum of the duration of the periodic update timer and the duration of the deactivated ISR timer.

The method according to any one of claims 1-8, wherein, after the acquiring the CS domain location information by using the first registration update process, the method further includes:

If the location information of the CS domain is perceived to change, a location update procedure is initiated.

10. A method of mobility management, the method comprising:

Sending the CS domain location information to the terminal device.

The method of claim 10, wherein the first registration update process sent by the receiving terminal device when moving from the GERAN/UTRAN network to the E-UTRAN network comprises:

Receiving a first registration update message sent by the terminal device when moving from the GERAN/UTRAN network to the E-UTRAN network, The first registration update message carries the evolved packet network EPS location information of the E-UTRAN network. The acquiring the circuit switched CS domain location information by using the first registration update procedure includes:

Corresponding CS domain location information is obtained according to the EPS location information.

The method according to claim 10, wherein, when the terminal device has a call service, the method further includes:

Receiving, by the SGSN, a paging message sent by the MSC, and paging the terminal device by using the GERAN/UTRAN network; the SGSN sending the paging message to an MME associated with establishing an ISR, so that the MME is in the The E-UTRAN network pages the terminal device.

A terminal device, the terminal device comprising:

The terminal device according to claim 13, wherein the registration update module sends, to the VANC, the EPS location information of the E-UTRAN network in the first registration update message.

The terminal device according to claim 14, wherein the location acquiring module receives the CS domain location information sent by the VANC, and the CS domain location information is determined by the VANC according to the EPS location. Information obtained.

The terminal device according to claim 13, further comprising:

a determining module, configured to determine an ISR activation state when the terminal device moves from the GERAN/UTRAN network to the E-UTRAN network;

When the determining module determines that the ISR activation state is that the ISR is not activated, the registration update module initiates the first registration update procedure to the VANC;

Or,

When the determining module determines that the ISR activation state is ISR is inactive, and in the E-UTRAN network, when the terminal device has a call service, the registration update module initiates the first registration update process to the VANC. ;

Or,

When the determining module determines that the ISR activation state is ISR is inactive, and in the E-UTRAN network, when the terminal device has a call service, determining that the last circuit domain information interaction process occurs in the GERAN/UTRAN network, Initiating the first registration update process to the VANC;

or, When the determining module determines that the ISR activation state is ISR inactive, and in the E-UTRAN network, when the terminal device has a call service, determining that the last circuit domain information interaction process occurs in the E-UTRAN network, The VANC initiates the first registration update process.

The terminal device according to claim 13 or 16, wherein the device further comprises: a second registration update module, comprising a registration holding unit and a registration update unit;

The registration holding unit is configured to move from the E-UTRAN network to the GERAN/UTRAN network before moving from the GERAN/UTRAN network to the E-UTRAN network, and maintain the VoLGA registration status;

The registration update unit is configured to initiate a second registration update process to the VANC to provide location information of the GERAN/UTRAN network.

The terminal device according to claim 17, wherein the registration holding unit starts a deregistration timer when moving from the E-UTRAN network to the GERAN/UTRAN network;

The registration holding unit terminates the deregistration timer if an indication of ISR activation is received before the deregistration timer does not overflow; or

The registration holding unit maintains the deregistration timer if an indication that the ISR is not activated is received before the deregistration timer has not overflowed.

The terminal device according to claim 17, wherein, when moving from the E-UTRAN network to the GERAN/UTRAN network, if receiving an indication that the ISR is not activated, the registration holding unit starts a deregistration timer; Or

If an indication of ISR activation is received, the registration holding unit does not initiate a deregistration timer.

The terminal device according to claim 17, wherein, when moving from the E-UTRAN network to the GERAN/UTRAN network, the registration holding unit starts a deregistration timer, and the maximum duration of the deregistration timer is greater than The sum of the periodic update timer duration and the deactivation of the ISR timer duration.

An access network controller, where the controller includes:

The controller according to claim 21, wherein the receiving module is specifically configured to:

Receiving a first registration update message sent by the terminal device when moving from the GERAN/UTRAN network to the E-UTRAN network, where the first registration update message carries the evolved packet network EPS location information of the E-UTRAN network; The location obtaining module is specifically configured to obtain corresponding CS domain location information according to the EPS location information.

The method of claim 21, wherein the controller further comprises: a paging module, configured to: when the terminal device has a call service, the SGSN receives a paging message sent by the MSC, by using the The GERAN/UTRAN network pages the terminal device;

The SGSN sends the paging message to an MME associated with establishing an ISR, so that the MME pages the terminal device on the E-UTRAN network.