WO2009067880A1

WO2009067880A1 - Method, system for the mobility management of a terminal and apparatus thereof

Info

Publication number: WO2009067880A1
Application number: PCT/CN2008/072932
Authority: WO
Inventors: Geng Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-11-12
Filing date: 2008-11-04
Publication date: 2009-06-04
Also published as: CN101437219B; CN101437219A

Abstract

A method for the mobility management of a terminal is disclosed in the embodiments of the present invention, which includes: a mobility management function receives a request message from a user equipment, the said request message carries the circuit domain location information of the said user equipment; the said mobility management function determines the location updated target mobile switching center based on the said circuit domain location information; the said mobility management function transmits an indication to the said target mobile switching center to enable the said target mobile switching center to update the registration state of the said user equipment. A system and an apparatus for the mobility management of a terminal are also disclosed in the embodiments of the present invention. In the embodiments of the present invention, a method for the mobility management cooperation between the circuit domain and the enhanced packet domain is provided, the method utilizes the packet domain to implement the mobility management of the circuit domain and to implement paging for the circuit domain, and is propitious to improve the usage of the enhanced network.

Description

Method, system and device for managing mobility of terminal This application claims to be submitted to the Chinese Patent Office on November 12, 2007, the application number is 200710186708.0, and the Chinese patent entitled "A Terminal Mobility Management Method and Equipment" Priority of the application, the entire contents of which are incorporated herein by reference. Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a mobility management method, system, and device for a terminal. Background technique

There are many types of wireless networks available today, including GSM (Global System for Mobile Communications) / WCDMA (Wideband Code Division Multiple Access), CDMA2000, and TS-CDMA (Time Synchronous Code). Division Multiple Access (Time Division Synchronous Code Division Multiple Access) can provide mobile services for users. These wireless networks have similarities in architecture and business capabilities. Let's take WCDMA as an example to describe the architecture of wireless networks. As shown in Figure 1, it includes: MSC (Mobile Switch Center) server and CS-MGW located in CN (Core Network)

(Circuit Switch Media Gateway, circuit i or media gateway), belonging to circuit i or core network; and SGSN (Serving GPRS Support Node) and GGSN (Gateway GPRS Support Node), belonging to the packet domain Core network; BSS (Base Station System) and RNS

(Radio Network Subsystem, the wireless network subsystem) belongs to the AN (Access Network) and is shared by the circuit domain and the packet domain core network. The core network is responsible for service control, which is used to check service subscriptions and provide service logic. The access network provides access capabilities for users, and provides basic signaling and media transmission channels for users to obtain services. basis.

Currently, users need to obtain the circuit domain access network from the circuit domain core network MSC. To take the service, the user needs to be located in the circuit domain coverage area, and usually needs to update the location of the MSC before the service can be obtained from the MSC. There are two methods for location update: Method 1: As shown in Figure 2, the following steps are included:

Step s201: When the UE (User Equipment) needs to perform location update, in order to establish a message transmission channel with the MSC/VLR (Visit Local Register), the radio resource management provided by the circuit domain access network is utilized. The function establishes a radio resource connection between the UE and the RNS/BSS to obtain a signaling transmission channel.

Step s202: The UE sends a location update message to the MSC/VLR through the RNS/BSS. Step s203: If the user is a subscription user, the MSC/VLR accepts the location update request of the user, and returns a location update acceptance to the UE. Before accepting, the MSC/VLR may go to the HLR to check the user's subscription information.

Step s204: The UE releases the established radio resource connection with the RNS/BSS.

The second method is shown in Figure 3 and includes the following steps:

Step s301: When the UE is located in an area with CS or PS (Packet Switch) coverage, the UE may use the packet domain to perform circuit domain location update, which is reflected by the UE to the SGSN. The CS and PS joint routing area/location area update request is sent.

Step s302, the SGSN sends a location update request to the MSC/VLR.

Step s303: If the user is a subscription user, the MSC/VLR accepts the location update request of the user, and returns a location update acceptance to the SGSN. Before accepting, the MSC/VLR may go to the HLR to check the user's subscription information.

Step s304: The SGSN returns a joint routing area and a location area update request accept message to the UE.

In the process of the second method, although the UE utilizes the flow of the packet domain routing domain update to perform the circuit domain location update, the location update is still for the circuit domain access, and the user still needs to pass the circuit domain when performing services (such as making a call). The access mode is not available through packet domain access (for example, VoIP calls cannot be made).

In the prior art, SAE (System Architecture Evolution) is a packet network architecture, and the main entity has MME (Mobility Management). Entity, mobility management entity), PDN GW and PCRF (Policy Control and Charging Rules Function). SAE has roaming architecture and non-roaming architecture. SAE provides users with a relatively efficient packet transmission network, which can be used to provide users with VoIP (voice over IP) services. The following uses a non-roaming architecture as an example to illustrate the network configuration of the SAE. The functions of the MME mainly include: mobility management, such as user attachment processing; participation in the establishment of user IP bearers. The functions of PDN GW (Packet Data Network Gate Way) are: IP address allocation management; bearer policy control; packet filtering. SAE can also support other non-3GPP access methods, such as WLAN (Wireless Local Area Network), WiMAX (World Interoperability for Microwave Access).

If the user is located in the coverage area of the 2G/3G circuit domain access mode and is located in the coverage area of its enhanced packet domain (hereinafter referred to as packet domain) access mode (such as SAE/Long Term Evolution Network LTE), the UE may not pass. The circuit domain accesses, but uses the packet access to complete the location update of the UE to the circuit domain core network to the circuit domain core network, so that the UE can perform circuit domain services. The UE completes the registration of the packet domain and the circuit domain through the packet domain access, and registers the packet domain and the circuit domain separately from the packet domain access and the circuit domain access respectively, reducing the number of interactions on the wireless interface (reducing Half), which helps to reduce the transmission load of the wireless interface.

The following uses LTE as an example to describe packet access. The specific process is shown in Figure 4, including the following steps:

Step s401: The UE sends a CS and EPS joint tracking area/location area update request to the MME.

Step s402: The MME sends a location update request to the MSC/VLR.

Step s403, if the user is a subscription user, the MSC/VLR accepts the location update request of the user, and returns a location update acceptance to the MME. Before accepting, the MSC/VLR may go to the HLR to check the user's subscription information.

Step s404: The MME returns a joint tracking area and a location area update request accept message to the UE. In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems:

Since there may be multiple MSCs in a network, when the packet network is LTE or other non-GRPS access mode, there is no prior art description of how the mobility management function in the packet network (the MME for the LTE access method) is selected. An MSC is the target MSC of the current location update of the UE, thereby implementing registration of the UE into the MSC. Summary of the invention

The embodiments of the present invention provide a mobility management method, system, and device for a terminal, so as to implement a target MSC that selects an MSC as the current location update of the UE.

An embodiment of the present invention provides a mobility management method for a terminal, including: a mobility management function, which receives a request message sent by a user equipment, where the request message carries circuit domain location information of the user equipment;

The mobility management function determines a target mobile switching center of the location update according to the circuit domain location information;

The mobility management function instructs the target mobile switching center to cause the target mobile switching center to update the registration status of the user equipment.

The embodiment of the present invention further provides a mobility management method for a terminal, including: acquiring, by a user equipment, circuit domain location information of the user equipment;

The user equipment sends a request message to the mobility management function, where the request message carries the circuit domain location information of the user equipment, so that the mobility management function determines the target mobile switching of the location update according to the circuit domain location information. Centrally, the registration status of the user equipment is updated in the target mobile switching center according to the request message.

An embodiment of the present invention provides a mobility management system for a terminal, including: a user equipment, configured to send, to a mobility management function entity, a request message sent by a user equipment, where the request message carries a circuit domain location of the user equipment Information

a mobility management function, configured to determine a target mobile switching center of the location update according to the circuit domain location information, and send an indication to the target mobile switching center to move the target The mobile switching center updates the status of the user equipment.

The embodiment of the invention further provides a user equipment, including:

a request obtaining unit, configured to acquire circuit domain location information of the user equipment, and a request sending unit, configured to send a request message to the mobility management function, where the request message carries circuit domain location information of the user equipment, The mobility management function determines a location-changed target mobile switching center based on the circuit domain location information, and the registration status of the user equipment is updated in the target mobile switching center according to the request message.

The embodiment of the present invention further provides a mobility management function entity, including: a target determining unit, configured to determine a target mobile switching center of the location update according to the circuit domain location information;

And an indication sending unit, configured to send an indication to the target mobile switching center, to enable the target mobile switching center to update the state of the user equipment.

Compared with the prior art, the embodiment of the invention has the following advantages:

In the embodiment of the present invention, a mobility management cooperation method between a circuit domain and an enhanced packet domain is provided, and the mobility management of the circuit domain and the paging of the circuit domain are performed by using the packet domain, which is beneficial to improving the enhanced network. Utilization rate. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present invention, other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a structural diagram of a WCDMA wireless network in the prior art;

2 is a flow chart of a position update in the prior art;

3 is another flow chart of location update in the prior art;

4 is a schematic diagram of LTE packet access in the prior art;

FIG. 5 is a flowchart of a method for managing mobility of a terminal according to an embodiment of the present invention; FIG. 6 is a flowchart of determining a relationship between a packet and a circuit domain network by a user UE according to Embodiment 1 of the present invention;

7 is a flowchart of a circuit domain location update by a user UE through packet access according to Embodiment 2 of the present invention;

8 is a flowchart of a process in which the UE moves to a packet-only access area after the location update is completed in Embodiment 3 of the present invention;

FIG. 9 is a flowchart of a process of moving a UE to a circuit domain only access area after the location update is completed in Embodiment 4 of the present invention; FIG.

FIG. 10 is a flowchart of a process in which the UE moves to a circuit domain only access area after the location update is completed in Embodiment 5 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a mobility management method for a terminal. The specific flowchart is as shown in FIG. 5, and includes the following steps:

Step s501: The UE performs a location update operation when the UE is powered on, or when the UE changes the location of the circuit domain, including from one circuit domain to another, or enters a circuit domain for the first time. The UE sends a joint update request to the mobility management function entity (MME) in the packetized network (e.g., SAE), which carries the circuit domain location information of the UE. The step of the UE acquiring the circuit domain location information before the UE sends the joint update request: the UE receives the broadcast information of the local circuit domain, selects the circuit domain network according to the broadcast information, and further selects one of the circuit domain networks. The cell, the identification information of the cell is the circuit domain location information.

When there are multiple operators' circuit domains and non-circuit domain (packet) networks, The UE can select the circuit domain or packet network of the same carrier for location update (when the UE selects the circuit domain network and the packet network in the registration process belong to different operators, and because there is no interconnection between operators, registration failed). The circuit domain and the packet network association information may be sent to the UE through the network side device (for example, the MME); or the association relationship information between the packet network and the circuit domain network may be configured in the UE or in the Subscriber Identity Module (SIM) card. The UE can determine the associated circuit domain network and packet network through this information. The association information includes: sending, by using a broadcast or the like, the associated circuit domain network information, such as a network number, to the UE in a packet network, or sending the associated packet network information, such as a PLMN, to the UE by means of broadcasting or the like in the circuit domain network. Pulic Land Mobile Network, or the same network identification information, such as the network number, is sent to the UE in the packet and circuit domain networks.

Step s502, the mobility management function determines the location updated MSC according to the circuit domain location information of the UE. The MME determines the target MSC according to the circuit domain location information of the UE, and combines the correspondence between the circuit domain location information and the MSC, and the corresponding relationship can be configured in the MME.

Step s503: The mobility management function interacts with the target MSC, and the MSC updates the state of the UE.

After step s503, if the UE moves to an area where there is no circuit domain access wireless signal coverage, and the original packet access wireless signal still exists, the UE may indicate the user to the MSC through the mobility management function in the packet network. Unreachable. Thereafter, if the UE re-enters an area with CS coverage, the UE may perform step s501 to step s503 to indicate to the MSC that the UE is reachable.

After step s503, if the UE moves to an area without packet access radio signal coverage, and the original circuit domain access radio signal still exists, the mobility management function in the packet network sends an indication to the MSC that the MSC no longer passes through the packet network. Send a page to the UE. The UE may perform location update through the circuit domain access, so that the UE can access the service through the circuit domain, and when the MSC receives the location update request of the UE, the MSC selects the circuit domain access to send the paging to the UE.

Embodiment 1 of the present invention, as shown in FIG. 6, further describes that the UE determines the packet and the circuit. The process of association of a domain network includes the following steps:

Step s601: The packet network such as SAE broadcasts the associated circuit domain network identification information to the UE, and the network identity information is the PLMN identifier of the circuit domain network.

Step s602: The UE camps according to the circuit domain network determined by the association information.

Of course, the associated packet network identifier information may also be broadcast by the circuit domain network, and the UE performs location update according to the indicated packet network; or the packet network broadcasts the same packet network identifier information by the identification information of the circuit domain network, and the UE can also associate Circuit domain networks and packet networks.

Embodiment 2 of the present invention: The UE performs circuit domain location update through packet access, as shown in FIG. 7, and includes the following steps:

Step s701: The user UE may send a tracking area or a location area joint update request to the mobility management function in a packet network such as SAE when the user UE is powered on, or when the circuit domain location changes or enters the circuit domain coverage area for the first time. Carrying the circuit domain location information of the UE.

Step s702: The mobility management function determines, according to the circuit domain location information of the UE, and the correspondence between the circuit domain location information and the MSC, the target MSC of the location update (such as MSC1 in FIG. 7).

Step s703: The mobility management function interacts with the target MSC, and the MSC updates the registration status of the UE.

Step s704: The mobility management function returns registration success to the UE.

Embodiment 3 of the present invention: After the location update is completed, the UE moves to a process of only the packet access area. H has no user UE. The processing in the second embodiment has been completed first, and then the UE moves, and the original circuit domain access signal is lost. As shown in Figure 8, the following steps are included:

Step s801: The UE may send a circuit domain access loss indication to the MME when the user UE can perform the foregoing operation when the power is turned on, or when the circuit domain location changes or enters the circuit domain coverage area for the first time.

Step s802: The MME sends a UE circuit domain access loss indication to the MSC, and the MSC records the event, and then does not send the paging to the UE through the MME. Step s803: The MME sends a circuit domain access loss indication response to the UE.

Embodiment 4 of the present invention: After the location update is completed, the UE moves to the processing of only the circuit domain access area. H No User The UE has first completed the processing in Embodiment 2, and then the UE has moved, and the original packet access signal is lost. As shown in FIG. 9, the method includes the following steps: Step s901: The UE finds that the packet access signal is lost.

Step s902: The UE sends a location update request to the MSC.

Step s903: After receiving the request, the MSC finds that the UE has performed location update through the MME, and then no longer sends a page to the UE through the MME, but sends a page to the UE through the circuit domain access, unless the MSC receives the call again. Location update request of the MME.

Step s904, the MSC returns a location update accept to the UE.

Embodiment 5 of the present invention: After the location update is completed, the UE moves to the processing of only the circuit domain access area. H No User The UE has first completed the processing in Embodiment 2, and then the UE has moved, and the original packet access signal is lost. As shown in FIG. 10, the method includes the following steps: Step slOOl, the MME finds that the UE accesses the network in a packet, for example, periodically tracking the area i or updating the timeout.

Step sl002: The MME sends a UE drop indication to the MSC.

Step sl003: After receiving the request, the MSC does not send a page to the UE through the MME, but sends a page to the UE through the circuit domain access, unless the MSC receives the location update request or the UE network recovery indication from the MME again.

Step sl004, the MME returns a UE drop indication response to the MSC.

The embodiment of the present invention further provides a mobility management system for a terminal, including: a user equipment, configured to send, to a mobility management function entity, a request message sent by a user equipment, where the request message carries a circuit domain of the user equipment Location information; a mobility management function, configured to determine a location update destination mobile switching center according to the circuit domain location information, and send an indication to the target mobile switching center, so that the target mobile switching center updates the registration status of the user equipment . In the Long Term Evolution network LTE, the mobility management function is a mobility management entity MME.

The user equipment specifically includes: a request obtaining unit, configured to acquire the user setting a circuit area location information; a request sending unit, configured to send a request message to the mobility management function, where the request message carries circuit domain location information of the user equipment, so that the mobility management function is based on the circuit domain The location information determines a target mobile switching center of the location update, the registration status of the user equipment is updated according to the request message in the target mobile switching center; and the circuit domain location information acquiring unit is configured to receive local circuit domain broadcast information. And selecting, according to the broadcast information, a cell in the circuit domain network, where the identifier information of the cell is the circuit domain location information. The association relationship information acquiring unit is configured to use the circuit domain and the packet network association information sent from the packet network or the circuit domain network; or pre-configure the association relationship information of the packet network and the circuit domain network.

The mobility management function entity specifically includes: a target determining unit, configured to determine a location update destination mobile switching center according to the circuit domain location information; and an information interaction unit configured to exchange information with the target mobile switching center to enable the target mobile switching The center updates the registration status of the user equipment. a first indicating unit, configured to notify the mobile switching center that the user is inaccessible in a circuit domain if the user equipment moves to an area where no circuit domain access wireless signal coverage exists, and the original packet access wireless signal still exists; And the user equipment re-enters the area covered by the circuit domain to access the wireless signal, and then notifies the target mobile switching center to re-update the registration status of the user equipment. a second indicating unit, configured to: if the user equipment moves to an area where there is no packet access wireless signal coverage, the mobility management function notifies the mobile switching center, so that the mobile switching center sends the user equipment to the user equipment through the circuit domain call.

The target determining unit specifically includes: a correspondence acquiring sub-unit, configured to acquire a correspondence between the circuit domain location information and the target mobile switching center; and a determining sub-unit, configured to: according to the corresponding relationship and the circuit domain in the received request message The location information determines the target mobile switching center.

In the embodiment of the present invention, a mobility management cooperation method between a circuit domain and an enhanced packet domain is provided, and the mobility management of the circuit domain and the paging of the circuit domain are performed by using the packet domain, which is beneficial to improving the enhanced network. Utilization rate.

Through the description of the above embodiments, those skilled in the art can clearly understand the present invention, which can be implemented by hardware, or can be added with necessary general hardware by software. The way to implement it. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product that can be stored in a non-volatile storage medium.

(may be a CD-ROM, a USB flash drive, a removable hard drive, etc.), including a number of instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for managing mobility of a terminal, comprising:

The mobility management function receives a request message sent by the user equipment, where the request message carries circuit domain location information of the user equipment;

The mobility management function sends an indication to the target mobile switching center to cause the target mobile switching center to update the registration status of the user equipment.

2. The mobility management method of a terminal according to claim 1, wherein the mobility management function is a mobility management entity MME.

The mobility management method of the terminal according to claim 1, wherein the mobility management function determines the target mobile switching center of the location update according to the circuit domain location information, and specifically includes:

The mobility management function acquires a correspondence between the circuit domain location information and the target mobile switching center;

The mobility management function determines the target mobile switching center based on the correspondence and the circuit domain location information in the received request message.

4. The method of managing mobility of a terminal according to claim 1, wherein the method further comprises:

The user equipment moves to an area where there is no circuit domain access wireless signal coverage, and the original packet access wireless signal still exists, and the mobility management function notifies the mobile switching center that the user equipment is not accessible in the circuit domain. and.

The mobility management method of the terminal according to claim 4, wherein the method further comprises: the user equipment re-entering a circuit domain access area covered by the wireless signal, the mobility management function notifying the The target mobile switching center re-updates the registration status of the user equipment.

The method for managing the mobility of the terminal according to claim 1, wherein the method further comprises: After the user equipment moves to an area without packet access wireless signal coverage, the mobility management function notifies the mobile switching center to cause the mobile switching center to send a page to the user equipment through a circuit domain.

7. A method for managing mobility of a terminal, comprising:

The user equipment acquires circuit domain location information of the user equipment;

The method for managing the mobility of the terminal according to claim 7, wherein the acquiring, by the user equipment, the circuit domain location information of the user equipment comprises:

The user equipment receives broadcast information, the broadcast information including location information of the user in the circuit domain.

The method for managing mobility of a terminal according to claim 8, wherein the receiving, by the user equipment, the broadcast information is that the user equipment receives the broadcast information from a circuit domain network.

The mobility management method of the terminal according to claim 7, wherein before the user equipment sends the request message to the mobility management function, the method further includes:

The user equipment acquires association information of the circuit domain and the packet network to the mobility management function;

The user equipment determines the type of the destination mobility management function according to the association relationship information.

The mobility management method of the terminal according to claim 10, wherein the acquiring, by the user equipment, the association information of the circuit domain and the packet network to the mobility management function comprises:

The user equipment acquires the circuit domain and the packet network association information sent by the packet network or the circuit domain network in real time; or

The association information of the packet network and the circuit domain network is pre-configured in the user equipment.

12. The mobility management method of a terminal according to claim 7, wherein: The sending, by the user equipment, the request message to the mobility management function includes: sending a registration request message when the user equipment starts; or

The registration update message is sent when the user equipment changes the location area of the circuit domain.

A mobility management system for a terminal, comprising: a user equipment, configured to send, to a mobility management function entity, a request message sent by a user equipment, where the request message carries a circuit domain location of the user equipment Information

And a mobility management function, configured to determine a location-changed target mobile switching center according to the circuit domain location information, and send an indication to the target mobile switching center, so that the target mobile switching center updates the registration status of the user equipment.

14. The mobility management system of the terminal according to claim 13, wherein in the long term evolution network LTE, the mobility management function is a mobility management entity

15. A user equipment, comprising:

The user equipment according to claim 15, further comprising: a circuit domain location information acquiring unit, configured to receive circuit domain broadcast information, and select a cell under the circuit domain network according to the broadcast information, The identification information of the cell is the circuit domain location information.

The user equipment according to claim 15, further comprising: an association information acquiring unit, configured to transmit circuit domain and packet network association information from a packet network or a circuit domain network; or preconfigure a packet network and a circuit Relationship information of the domain network.

18. A mobility management functional entity, comprising: a target determining unit, configured to determine a target mobile switching center of the location update according to the circuit domain location information;

And an indication sending unit, configured to send an indication to the target mobile switching center, to enable the target mobile switching center to update the registration status of the user equipment.

The mobility management function entity according to claim 18, wherein the target determining unit specifically includes:

Corresponding relationship acquisition subunit, configured to acquire a correspondence relationship between the circuit domain location information and the target mobile switching center;

Determining a subunit, configured to determine the target mobile switching center according to the correspondence relationship and circuit domain location information in the received request message.

The mobility management function entity of claim 18, wherein the mobility management function further comprises:

a first indicating unit, configured to notify the mobile switching center that the user is inaccessible in a circuit domain if the user equipment moves to an area where no circuit domain access wireless signal coverage exists, and the original packet access wireless signal still exists; And the user equipment re-enters the area covered by the circuit domain to access the wireless signal, and then notifies the target mobile switching center to re-update the registration status of the user equipment.

a second indicating unit, configured to: if the user equipment moves to an area where there is no packet access wireless signal coverage, the mobility management function notifies the mobile switching center, so that the mobile switching center sends the user equipment to the user equipment through the circuit domain call.