WO2008154789A1

WO2008154789A1 - A method of selecting mobile management mode in wireless network

Info

Publication number: WO2008154789A1
Application number: PCT/CN2008/000289
Authority: WO
Inventors: Zaifeng Zong; Gang Chen; Hongyue Sun
Original assignee: Zte Corporation
Priority date: 2007-06-18
Filing date: 2008-02-03
Publication date: 2008-12-24
Also published as: CN101330719A; CN101330719B

Abstract

A method of selecting mobile management mode in wireless network belongs to the art of wireless network. The method of present invention includes: a mobile terminal accesses in network, when authentication it sends the mobile management mode supported by the mobile terminal to an access gateway; the said access gateway considers the capability of mobile management modes supported by the mobile terminal and the gateway, in order to select a mobile management mode for said mobile terminal's access. The present invention solves the problem that whether proxy mobile IP or standard mobile IP should be selected when the mobile terminal initiates in a new access network or switches into a new access network, and also solves the problem for network entity how to know the mobile management mode supported by the other network entity, so as to improve the service quality.

Description

Method for selecting mobile management mode in wireless network

Technical field

The present invention relates to the field of wireless networks, and in particular, to a method for selecting a mobility management mode in a wireless network.

Background technique

Mobile IP (Mobile IP) is a widely accepted mobile management protocol that keeps the IP connection of mobile terminals (MN, Mobile Node) uninterrupted when moving between different networks. In mobile IP, the mobile terminal keeps its home address (HoA, Home of Address) unchanged. When the access point of the mobile terminal changes, the mobile terminal updates (Binding Update, applicable to MIPv6) or registration. The request message (RRQ, Register Request, for MIPv4) notifies the home agent (HA, Home Agent) located in its home network (Home Network), so that the data sent to the mobile terminal can be correctly routed to the new access. point.

Mobile IP technology requires mobile terminals to support the Mobile IP protocol. In reality, there are very few mobile terminals that support mobile IP. Therefore, a technology for Proxy Mobile IP (PMIP) has been developed. Proxy mobile IP means that there is a proxy node (Proxy mobile IP Agent) in the access network. When the mobile terminal moves between different access points, the proxy node is responsible for sending the mobile IP binding update to the mobile agent instead of the mobile terminal. A message or registration request message to inform the home agent of the new location of the mobile terminal.

When a mobile terminal moves between different types of networks, such as from a UMTS (Universal Mobile Telecommunications System) network to a Wireless Fidelity (WiFi) network, it is often necessary to switch from one network adapter to another, for example, from supporting UMTS. The PC memory card international joint ^ PCMCIA ) card is switched to the WiFi network card. At this time, to support the service without interruption, different network adapters must use the same IP address (ie HoA ) before and after the switch. In the current implementation of the wireless terminal, the IP layer and the MAC layer are not well separated. Therefore, most mobile terminals do not support this function. Such a mobile terminal cannot use the proxy mobile IP to maintain the continuity of the service when doing cross-network type handover, and must use mobile IP to keep the service continuous. In addition, support for proxy mobile IP is an ability to access the network. Many existing access networks do not have the ability to support proxy mobile IP; and proxy mobile IPv6 introduces new variables, which requires the home agent to support this variable in order to support proxy mobile IP.

When a mobile terminal is activated in a new access network or switched to a new access network, selecting a proxy mobile IP or a standard mobile IP becomes a new problem. This requires a combination of the capabilities of the mobile terminal, the ability to access the network, and the capabilities of the home agent. Mobile terminals may support standard MIP (such as MIPv4 or MIPv6) or mobile IP. When the mobile terminal does not support mobile IP, the access network is required to support the proxy mobile IP, otherwise the service continuity of the mobile terminal cannot be guaranteed. Take IPv6 as an example. The possible combinations are shown in Table 1:

As can be seen from Table 1, in most cases, the selection result is determined. For example, when the mobile terminal supports both ΜΙΡν6 and ΡΜΙΡν6, and the home agent only supports MIPv6, it does not need to consider the support capability of the access network. The result of the selection is MIPv6. Only in a few cases, there are selection problems, such as mobile terminals and home agents supporting both MIPv6 and PMIPv6, and access When the network only supports PMIPv6, further selection is needed to get the exact result. However, even in the case where the results shown in Table 1 are determined, there is still a problem of how the network entities know the mobility management protocols supported by other entities. For example, how does the mobile terminal know that the access network supports PMIPv6, so choose PMIPv6 as the current mobility management protocol? How does the access network know if the home agent of the mobile terminal supports PMIPv6?

The WiMax (Worldwide Interoperability for Microwave Access) standard defines an implicit method of selecting a mobility management protocol that does not require capability interaction. In WiMax, when the mobile terminal supports MIPv4, MIPv4 is preferred; otherwise, the proxy moves IPv4. After the access authentication of the mobile terminal ends, the access gateway sends a Router Advertisement message to the mobile terminal, where the message includes the address of the access gateway, and the address is used as the attention address of the mobile terminal (CoA, Care) -of-address ). If the access gateway receives the registration request message (RRQ) sent by the mobile terminal, the access gateway determines that the mobile terminal supports MIPv4, and then selects the MIPv4 protocol as the mobility management protocol of the mobile terminal; if the access gateway receives the mobile The DHCP discovery message sent by the terminal, the access gateway considers that the mobile terminal does not support MIPv4, and then selects PMIPv4 as the mobile management protocol of the mobile terminal.

This implicit mobility management protocol selection method in WiMax only supports IPv4, and can only be used in the case of preferred terminal-based mobile IP (Client based MIP), when it is necessary to support IPv6, or need to support preferred proxy mobility. For IP, a new approach is needed.

In summary, there is a need for an explicit method of selecting a mobility management mode that requires capability interaction.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method for selecting a mobility management mode in a wireless network. When a mobile terminal starts up in a new access network or switches to a new access network, an appropriate mobility management mode can be selected. It solves the problem of how to understand the mobility management modes supported by other entities between network entities.

In order to solve the above problems, the present invention provides a method for selecting a mobility management mode in a wireless network, including the following steps, a mobile terminal accesses the network, and sends the mobility management mode supported by the mobile terminal to the access gateway during authentication;

b. The access gateway integrates its own and the mobility management mode supported by the mobile terminal, and selects a mobility management mode for access by the mobile terminal.

Further, in the above method, the authentication is access authentication or tunnel authentication.

The foregoing method, before the step b, further includes: in the access authentication process or the tunnel authentication process, the authentication system of the home network of the mobile terminal may be allocated to the home agent supported by the mobile terminal. A mobility management mode is sent to the access gateway.

Before the step b, the method further includes: in the access authentication process or the tunnel authentication process, the authentication system of the home network of the mobile terminal sends the mobility management mode subscribed by the mobile terminal to the access gateway.

In the above method, after the authentication system sends the mobility management mode supported by the home agent and/or the mobility management mode subscribed by the mobile terminal to the access gateway, the access gateway is When the mobile terminal selects the mobility management mode, it should also integrate the mobility management mode supported by the home agent and/or the mobility management mode subscribed by the mobile terminal.

The above-mentioned home agent that can be assigned to the mobile terminal is one or more.

Further, in the above method, in the step a, when the mobile terminal supports multiple mobility management modes, setting a priority order for the mobility management modes and simultaneously transmitting the priority information to the access gateway, The access gateway saves the priority information. When there are multiple mobile management modes supported by the mobile terminal, the mobility management mode with the highest priority is preferentially selected.

The authentication system of the home network transmits the IP address of the home agent and the mobility management mode supported by the home agent to the access gateway in the authentication and authorization charging response message.

The access gateway is an evolved data service gateway or a gateway device with access authentication function in the radio access network;

The authentication system of the home network includes the third generation partner program network authentication authorization charging server and the third generation partner program network authentication authorization charging proxy server; the third generation partner program network authentication authorization charging server is located at the The home network of the mobile terminal, The access of the mobile terminal, the establishment of the IP security tunnel, the mobile IP protocol for authentication, and the assignment of the home agent to the mobile terminal together with the home subscriber server;

The above-mentioned home agent is a data network gateway, which serves as an egress gateway to and from the external data network.

The invention also discloses a method for selecting a mobility management mode in a wireless network, comprising the following steps,

In the process of establishing the IP security tunnel of the mobile terminal, the mobile terminal sends the mobile management mode supported by the mobile terminal to the evolved data service gateway according to the priority order set by the mobile terminal, and the evolved The data service gateway saves configuration options of the mobile terminal;

T2, the evolved data service gateway informs the third generation partner plan network authentication authorization charging server in the process of authorizing the access point name, the mobile terminal needs mobile management mode support, and requires the third generation partner Plan the network authentication and authorization billing server to allocate a data network gateway;

T3. The third generation partner program network authentication authorization charging server sends the mobile management mode signed by the mobile terminal, the IP address of the data network gateway, and the mobile management mode supported by the data network gateway to the An evolved data service gateway;

T4. The evolved data service gateway integrates a mobility management mode in the mobile terminal configuration option, a mobility management mode subscribed by the mobile terminal, a mobility management mode supported by the data network gateway, and a self-supported The ability of the mobility management mode determines the selected mobility management mode and places the selected mobility management mode in the configuration options for transmission to the mobile terminal.

Compared with the prior art, when the system uses the system to perform access authentication on the mobile terminal, the mobile terminal sends the mobility management mode supported by the mobile terminal to the access gateway (Access Gateway) in priority order; in the system authentication process, Authentication system (AAA system, AAA is Authentication, Authorization, Accounting, ie authentication, authorization, accounting) Assigns a home agent to the mobile terminal. The AAA system collects the mobility management mode capabilities supported by the home agent and sets the IP address of the home agent. And the mobility management mode capability is sent to the access gateway; the capability of the access gateway to integrate the mobile terminal, the capability of accessing the network, and the capability of the home agent determine the selected mobility management mode, It solves the problem of selecting proxy mobile IP or standard mobile IP when the mobile terminal starts up in a new access network or switches to a new access network, and also solves how mobile entities supported by other entities are supported by network entities. The problem of the model, thus improving the quality of service. BRIEF abstract

1 is a flow chart of a method for selecting a mobility management mode in a wireless network according to an embodiment of the present invention;

2 is a structural diagram of an interworking example of IWLAN and 3GPP according to an embodiment of the present invention; and FIG. 3 is a sequence diagram of a method for selecting a mobility management mode in an interworking example between IWLAN and 3GPP according to an embodiment of the present invention.

Preferred embodiment of the invention

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

When the mobile terminal initiates or switches to a new access network in a new access network, the new access network includes a UMTS network, a WiFi network, a WiMax network, an IWLAN (Interworking Wireless LAN), or a 3GPP network. (3rd Generation Partnership Project), etc. At this time, the method of selecting the mobility management mode in the wireless network includes the following steps, as shown in FIG. 1:

Step 110: The mobile terminal accesses the network, and sends the mobility management mode information supported by the mobile terminal to the access gateway when the authentication (such as access authentication or tunnel authentication) is performed;

The mobile terminal access network includes the mobile terminal starting up in a new access network or switching to a new access network.

If the mobile terminal supports multiple mobility management modes, the priority order may also be set for these mobility management modes and the priority information may be simultaneously sent to the access gateway.

Step 120: In the authentication process, the authentication system of the home network (ie, the AAA system) selects the home agent for the mobile terminal, acquires the mobile management mode supported by the home agent, and moves the IP address of the home agent and the mobile supported by the home agent. The management mode is sent to the access gateway.

In this step, the authentication system may set the IP address of the home agent in the AAA response message and the The mobility management mode supported by the home agent is sent to the access gateway.

Step 130: The access gateway integrates the capabilities of its own, the mobile terminal, and the home agent to support the mobility management mode, and selects a suitable mobility management mode for the access of the mobile terminal.

Step 140: The mobile terminal accesses the network by using the access gateway for its designated mobility management mode.

In other embodiments, after performing step 110, the authentication system of the home network of the mobile terminal described in step 120 may selectively return the mobility management mode supported by the home agent and/or the mobility management mode signed by the mobile terminal. Give the access gateway. At this time, in step 130, the access gateway integrates the capabilities of the mobility management mode supported by itself, the mobile terminal, and the home agent, and/or the mobility management mode subscribed by the mobile terminal, and selects a suitable mobility management mode for the access of the mobile terminal. .

Of course, in other embodiments, there is also a case where the authentication system of the home network does not return any information to the access gateway. In this case, the mobility management mode supported by the home agent and/or the mobility management mode signed by the mobile terminal may be ignored. After performing step 110, the access gateway directly selects a suitable mobility management module for the access of the mobile terminal according to its own capabilities and the mobility management mode supported by the mobile terminal.

The foregoing embodiment is applicable to a case where a mobile terminal accesses a 3GPP network from a trusted non-3GPP network or an untrusted non-3GPP network, where the access gateway is a gateway device with access authentication function in the radio access network (such as WiMax (microwave) a radio access network access gateway (ASN-AGW) that accesses global interworking); when the trusted non-3GPP network interworks with the 3GPP network, the access gateway is a gateway device with an authentication function located in a non-3GPP network And the mobility management mode capability is sent to the access gateway when the access authentication is performed; when the non-trusted non-3GPP network communicates with the 3GPP network, the access gateway is an evolved data service gateway (ePDG) And the mobility management mode capability is sent to the ePDG during tunnel authentication.

The present invention will be further described below by taking the non-trust non-3GPP and 3GPP interworking as an example. Figure 2 is an architectural diagram of the present example, including devices and interfaces,

The device includes: UE (User Equipment, mobile terminal), ePDG, PDN GW (Packet data network gateway), 3GPP AAA Server (3GPP authentication and authorization charging) Server), 3GPP Proxy AAA (3GPP AAA Proxy Server), HSS (Home Subscriber Server, Home Subscriber Server);

The interface includes interface Wu, interface Wn*, interface S2b, interface S2c, interface Wm*, interface Wx*, interface Wd*, interface S6c, and interface SGi.

The UE is a mobile terminal, and is also referred to as a MN in the mobile IP. The UE is located in a range covered by the untrusted non-3GPP access network, and the UE accesses the 3GPP service through the ePDG.

The ePDG is configured to access the UE to the 3GPP network, where the ePDG is an access gateway of the access network in the architecture;

The PDN GW has a home agent function for the egress gateway to the external data network; in Figure 2, the PDN GW is located in the home network, but in actual network deployment, the PDN GW can also be located in the visited network.

The 3GPP AAA Server is located in the home network of the UE, and is used for authenticating the access of the UE, establishing the IPSec tunnel, and the mobile IP protocol, and assigning the PDN GW to the UE together with the HSS;

3GPP Proxy AAA, located in the visited network, used for secure forwarding of AAA messages, and controls access of the UE to the visited network;

The authentication system of the home network includes a 3GPP AAA Server and a 3GPP Proxy AAA.

The HSS is used to store subscription information of a user, a shared key of a user, and the like;

Interface Wu: Used for the interface between the UE and the ePDG. The interface runs the tunnel mode of the IPSec (IP Security) protocol.

Interface Wn*: interface between the ePDG and the WLAN IP access system;

Interface S2b: used for the interface between the PDN GW and the ePDG. When the ePDG supports the proxy mobile IP, the interface is valid. Otherwise, the interface does not exist. The proxy mobile IP protocol is run on the interface. The interface S2c: is used for the UE and the PDN. The interface between the GWs, when the UE is accessed by using the mobile IP based on the client, the interface is used, and the interface runs the mobile IP protocol;

Interface Wm*: used for ePDG and 3GPP AAA proxy server located in roaming area (ie 3GPP

An interface between the AAA Proxy and the AAA protocol running on the interface. The interface is the interface between the ePDG and the AAA system. Interface Wx*: used for the interface between the 3GPP AAA Server and the HSS. The interface is used to obtain data such as user vectors and subscription information.

Interface Wd*: used for the interface between the 3GPP AAA Server and the 3GPP AAA proxy server. The interface is mainly used for forwarding AAA messages.

Interface S6c: used for the interface between the PDN GW and the 3GPP AAA Server, which is used to obtain the authentication information related to the mobile IP;

Interface SGi: Used for the interface between the 3GPP network and the external data network.

In FIG. 2, the UE may or may not support mobile IP; the ePDG may or may not support proxy mobile IP; the PDN GW may or may not support proxy mobile IP. Only standard mobile IP is supported, as shown in Table 1. Therefore, it is necessary to select the mobility management mode used by the UE when the UE accesses.

Figure 3 is a diagram for the architecture of Figure 2, which includes the selection of the mobility management mode of the UE. In this process, in the establishment process of the IPSec tunnel of the UE, the UE sends the mobility management mode supported by the UE to the ePDG according to the priority order of the mobility management mode that is set, and the ePDG saves the UE. The configuration option; the ePDG informs the 3GPP AAA Server in the process of authorizing the access point name that the UE needs mobility management mode support, and requires the 3GPP AAA Server to allocate a PDN GW; the 3GPP AAA Server will subscribe the mobile management mode, PDN The IP address of the GW and the mobility management mode supported by the PDN GW are sent to the ePDG; the mobility management mode in the ePDG integrated UE configuration option, the mobility management mode subscribed by the UE, and the mobility management mode supported by the PDN GW and The ability of the mobile management mode supported by itself determines the selected mobility management mode, and the selected mobility management mode is sent to the UE in the configuration option; the UE accesses the network using the specified mobility management mode.

As shown in Figure 3, the details are as follows:

Step 1: Perform an IKE (Internet Key Exchange) initialization message between the UE and the ePDG; perform an IKE initialization message between the UE and the ePDG, and exchange IKE key information and an algorithm.

Step 2: The UE sends an IKE authentication request message to the ePDG, and the ePDG saves the configuration option content after receiving the message.

In the message, the UE places the mobility management modes supported by the UE in the priority order. The option is sent to the ePDG. At the same time, the UE also sends the access point name information to the ePDG in the message, and the ePDG should save the access point name for later use; the message further includes the UE ID, the security association, Select the child.

Step 3: According to the prior art, the system performs EAP AKA authentication on the UE.

Step 4: The ePDG authenticates the access point name of the UE, and requests the 3GPP AAA Server to allocate the PDN GW to the UE. The ePDG sends the access point name to the 3GPP AAA Server;

The access point name can be used to indicate whether the UE needs mobile IP support.

Step 5: The 3GPP AAA Server interacts with the HSS, requests the subscription information of the UE, authenticates the access point name, and allocates a PDN GW to the UE.

The 3GPP AAA Server checks whether the UE has access to the data network indicated by the access point name; if the access point name is checked successfully, the 3GPP AAA Server allocates the PDN GW to the UE according to its configuration and the subscription information of the UE obtained from the HSS. And determining the mobility management mode supported by the PDN GW; for example, the 3GPP AAA Server queries the local configuration according to the access point name obtained in step 4, if the access point name is configured in the 3GPP AAA Server to provide mobile IP support, and is configured The IP address and mobility management mode of the corresponding PDN GW, the 3GPP AAA Server obtains the IP address and the mobility management mode of the PDN GW from the configuration information; or, the 3GPP AAA Server determines that the UE needs the mobile IP according to the subscription information obtained from the HSS. In addition, the IP address of the PDN GW and the mobility management mode required for the mobile IP are configured in the subscription information of the UE, and the 3GPP AAA Server acquires the IP address and the mobility management mode of the PDN GW from the subscription information of the UE.

The method for selecting the PDN GW and the method for determining the PDN GW mobility management mode are various. The methods listed in the specific embodiments of the present invention are only one of them, and can be customized according to requirements when implemented.

Step 6. The 3GPP AAA Server sends an authentication response message to the ePDG.

The 3GPP AAA Server sends the IP address of the PDN GW and its supported mobility management mode and the mobility management mode subscribed by the UE to the ePDG. If the 3GPP AAA Server selects more than one PDN GW for the UE in step 5, the message includes a list of PDN GWs and respective supported mobility management modes. Step 7: The mobility management mode in the configuration option received by the ePDG from the UE and the mobility management mode supported by the UE, and the received PDN GW list and the mobility management mode subscribed by the UE select a mobility management mode for the UE;

The present invention is not limited to a specific selection method. In practical applications, under the premise of ensuring that the terminal can work normally (which can be judged according to Table 1 in the background art), the ePDG can customize the method of selecting the mobility management mode according to actual needs. For example, the ePDG may be selected according to a priority order of the mobility management mode supported by the UE, if the mobility management mode of the previous priority is compatible with the mobility management mode subscribed by the UE, the mobility management mode supported by the home agent, and the access gateway. The mobility management mode does not match, and then the next priority mobility management protocol supported by the UE is tried. Alternatively, the UE does not transmit the priority information of the mobile management mode, and when there are multiple selectable mobility management modes, the mobile management mode subscribed by the UE is preferentially selected.

Step 8. The ePDG calculates an IKE authentication vector.

The ePDG calculates the IKE authentication vector based on the key material obtained in step 3.

Step 9. The ePDG sends an IKE authentication response to the UE.

The response contains an EAP success message.

Step 10: The UE sends an IKE authentication request to the ePDG, and after receiving the IKE authentication request, the ePDG authenticates the identity of the UE according to the authentication vector.

The UE sends an IKE authentication request to the ePDG, and the UE calculates an authentication vector according to the key generated in the authentication phase.

After receiving the IKE authentication request, the ePDG authenticates the identity of the UE according to the authentication vector, and confirms that the IKE initial message sent by the UE to the ePDG in step 1 is indeed sent by the same UE, and is not modified.

Step 11: The ePDG sends an IKE authentication response to the UE, and the ePDG sends the selected mobility management mode to the UE in the configuration payload.

The ePDG recalculates the authentication vector according to the key generated by the EAP authentication process. In this step, the ePDG sends the mobility management mode selected in step 7 to the UE in the configuration payload. Meanwhile, the message also negotiates between the UE and the ePDG. The IPSec sub-security association, the ePDG sends the sub-security association and its selectors to the UE. The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Industrial applicability

The present invention is applied to a process in which a mobile terminal moves between different types of networks, such as moving from a UMTS (Universal Mobile Telecommunications System) network to a Wireless Fidelity (WiFi) network, or a case where a non-3GPP network can communicate with a 3GPP network. The technical solution of the present invention solves the problem of selecting a proxy mobile IP or a standard mobile IP when a mobile terminal starts up in a new access network or switches to a new access network, and also solves how other entities are known between network entities. Support for the problem of mobile management mode, thereby increasing the amount of service shield.

Claims

Claim

A method for selecting a mobility management mode in a wireless network, comprising the steps of: a, a mobile terminal accessing a network, and transmitting, by the mobile terminal, a mobility management mode supported by the mobile terminal to the access gateway;

2. The method of claim 1 wherein:

The authentication is access authentication or tunnel authentication.

3. The method of claim 2, wherein

Before the step b, the method further includes: in the access authentication process or the tunnel authentication process, the authentication system of the home network of the mobile terminal is to be allocated to the mobile agent supported by the home agent of the mobile terminal The management mode is sent to the access gateway.

4. The method of claim 1 or 3, characterized in that

Before the step b, the method further includes: in the access authentication process or the tunnel authentication process, the authentication system of the home network of the mobile terminal sends the mobility management mode signed by the mobile terminal to the Access gateway.

5. The method of claim 4, wherein

After the authentication system sends the mobility management mode supported by the home agent and/or the mobility management mode subscribed by the mobile terminal to the access gateway, the access gateway selects a mobile terminal for the mobile terminal. The management mode should also integrate the mobility management mode supported by the home agent and/or the mobility management mode of the mobile terminal.

6. The method of claim 3, wherein

The home agent that can be assigned to the mobile terminal is one or more.

7. The method of claim 1 wherein: In the step a, when the mobile terminal supports multiple mobility management modes, setting a priority order for the mobility management modes and simultaneously transmitting the priority information to the access gateway, where the access gateway saves the Priority information, when there are multiple mobile management modes supported by the mobile terminal, the mobile management mode with the highest priority is preferentially selected.

8. The method of claim 4, wherein

The authentication system of the home network sends the IP address of the home agent and the mobility management mode supported by the home agent to the access gateway in the authentication and authorization charging response message.

9. The method of claim 3, wherein

The authentication system of the home network includes a third generation partner program network authentication authorization charging server and a third generation partner program network authentication authorization charging proxy server; the third generation partner program network authentication authorization charging server is located The home network of the mobile terminal authenticates access of the mobile terminal, establishment of an IP security tunnel, and a mobile IP protocol, and allocates the home agent to the mobile terminal together with the home subscriber server;

The home agent is a data network gateway and serves as an egress gateway to and from the external data network.

A method for selecting a mobility management mode in a wireless network, comprising the following steps: tl. In the process of establishing an IP security tunnel of the mobile terminal, the mobile terminal sets the mobility management mode supported by the mobile terminal according to the priority set by the mobile terminal. The sequence is placed in the configuration option and sent to the evolved data service gateway, where the evolved data service gateway saves configuration options of the mobile terminal;

Transmitting the mobility management mode and the IP address of the data network gateway and the mobility management mode supported by the data network gateway to the evolved data service gateway; T4. The evolved data service gateway integrates a mobility management mode in the mobile terminal configuration option, a mobility management mode subscribed by the mobile terminal, a mobility management mode supported by the data network gateway, and a self-supported The ability of the mobility management mode determines the selected mobility management mode and places the selected mobility management mode in the configuration options for transmission to the mobile terminal.