WO2011020368A1 - Method, device and system for processing emergency attachment - Google Patents

Abstract

A method for transferring an emergency indication, a method and a system for processing emergency attachment, a Mobility Management Entity (MME) and a Home Subscriber Server (HSS) are provided. The method for transferring the emergency indication comprises: the MME receives an emergency attachment request initiated by a User Equipment (UE), transmits a location updating request message to the HSS after the authentication of the UE is passed, and carries the emergency indication in the location updating request message. The method for processing emergency attachment comprises: the HSS receives the location updating request message carrying the emergency indication, checks whether the UE has non Third Generation Partnership Projects (3GPP) access network subscription information according to the emergency indication, and if yes, transmits to the MME a first subscription information which includes the information that the UE has non-3GPP access network subscription information. The solution can ensure the continuity of an emergency call, and improves the reliability of a network.

Description

 Emergency attachment treatment method, device and system

Technical field

 The present invention relates to the field of communications, and in particular, to a method and system for handling emergency attach and a Mobility Management Entity (MME).

Background technique

 The Internet Protocol Multimedia Core Network Subsystem (IMS) is the core of the new generation communication network. It uses the Session Initiation Protocol (SIP) system. SIP has nothing to do with access, and has the ability to separate media service control functions from bearer separation, call and session separation, application and service separation, service and network separation, and mobile network and Internet service convergence. Because IMS is independent of access, Emergency Call (EMC) under IMS can be built on the System Architecture Evolution (SAE) network. SAE can also be called EPS (Evolved Packet System).

 FIG. 1 shows a primary network element involved in an emergency call by a User Equipment (UE) to access an IMS through a SAE.

 As shown in FIG. 1 , the main network elements involved in the emergency call of the UE to access the IMS through the SAE include: a network element of the SAE network part and a network element of the IMS emergency service part.

The network element of the SAE network part is used to provide the underlying bearer management and mobility management. The network elements of the SAE network part include: an enhanced radio base station (eNodeB), an MME, a Home Subscriber Server (HSS), and a user plane data processing network element (SAE GW); the SAE GW includes a packet data network gateway. (Packet Data Network Gateway, referred to as P-GW) and Serving GW (S-GW for short); P-GW is the mobility anchor in the SAE system, and is the SAE and packet data network (Packet Data Network) The border gateway, referred to as PDN, is responsible for PDN access and forwarding data between SAE and PDN. The MME is responsible for managing and storing the context of the UE (eg, UE identity/user identity, mobility management) Status, user security parameters, etc., assign a temporary identifier to the user. When the UE is camped on the tracking area or the network, it is responsible for authenticating the UE. The HSS is used to store user data.

 The network element of the IMS emergency service part is used to control and process the session of the emergency call. The network element of the IMS emergency service part includes: a Call Session Control Function (Call Session Control Function, CSCF for short), which is a core network element for controlling a session process, and the CSCF includes a proxy call session control function module (Proxy-CSCF, Referred to as P-CSCF, the Interrogating-CSCF (I-CSCF for short), the Serving-CSCF (S-CSCF for short), and the E-CSCF. The E-CSCF is the session control center of the emergency call, and determines which Public Safety Answering Point (PASP) the emergency call should be routed to.

 Figure 2 is a flow chart of a UE that can pass the authentication and is successfully attached to the SAE network through an eNodeB with an effective International Mobile Subscriber Identity (IMSI). The specific steps include:

 Step 201, the UE initiates an emergency attach request to the MME, and the request is sent by the eNodeB, where the user identity IMSI is included;

 Step 202: The MME initiates the authentication of the UE to the HSS, and establishes a secure connection between the UE and the MME. The IMSI is valid in the HSS, and the authentication is passed.

 Step 203: The MME initiates a location update request to the HSS, requesting the HSS to register that the UE is currently attached to the MME.

 Step 204: The HSS checks the subscription data of the UE, and if the UE is not allowed to access the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), that is, the MME access is not allowed. Or the UE is not allowed to access the public land mobile network (PLMN) where the MME is located, and the HSS rejects the normal registration of the UE, and sends a location update reply to the MME, indicating that the normal registration fails, and the download is not performed. The subscription data of the UE is sent to the MME;

 Step 205: The MME continues to establish an emergency bearer for the UE, and initiates an emergency bearer setup request to the SAE-GW.

Step 206: The MME completes emergency bearer setup from the UE to the SAE-GW, and notifies the UE of the emergency. The attachment is complete.

 In the subsequent step, when the MME has the subscription data of the UE, the MME determines that the notification request needs to be sent to the HSS according to the subscription data of the third generation Partnership Projects (3GPP) access network. (Notify Request), sending the access point name (Access Point Name, APN for short) and the information of the P-GW (ie, the identifier (ID) and/or IP address of the P-GW) to the HSS; In the process, since the MME does not have the subscription data of the UE, the MME cannot determine whether the UE may switch to the non-3GPP access network, and thus cannot determine whether it is necessary to send the information of the APN and the P-GW to the HSS.

 If the HSS receives the information of the APN and the P-GW, it saves it in the database corresponding to the UE. When the UE switches to the non-3GPP access network, the non-3GPP access network may obtain the information of the APN and the P-GW from the HSS, thereby establishing a PDN for the UE to the same P-GW represented by the APN. Connect to achieve business continuity.

 In the prior art, the subscription data of the UE cannot be downloaded to the MME in step 204, so that the MME cannot determine whether the UE may switch to the non-3GPP access network in the subsequent step, so the information of the APN and the P-GW cannot be sent to the HSS. When the UE finally switches to the non-3GPP access network, the PDN connection to the APN and the P-GW cannot be established, causing the handover to fail and the emergency service to be discontinuous. This will affect the user experience, emergency services and network reliability.

Summary of the invention

 The technical problem to be solved by the present invention is to provide a method, a device, and an emergency attachment processing method and system and an MME for solving an emergency indication. In the prior art emergency attachment process, the UE does not download the UE due to the HSS rejecting the normal registration of the UE. The subscription data is sent to the MME, causing the handover failure and the emergency service discontinuity when the UE switches to the non-3GPP access network.

 In order to solve the above technical problem, the present invention provides a method for transmitting an emergency indication, including: a mobility management entity (MME) receives an emergency attach request initiated by a user equipment (UE), and after authenticating the UE, to the home subscriber The server (HSS) sends a location update request message and carries an emergency indication in the location update request message.

In order to solve the above technical problem, the present invention provides an emergency attachment processing method, including: Receiving, by the HSS, a location update request message carrying an emergency indication, according to the emergency indication, checking whether the UE has non-3rd Generation Partnership Project (3GPP) access network subscription information, and if yes, sending the first subscription information to the The MME, the first subscription information includes information that the UE has non-3GPP access network subscription information.

 The above processing methods also include:

 And the MME learns that the UE has non-3GPP access network subscription information, and sends information about an access point name (APN) and a packet data network gateway (P-GW) connected by the UE to the HSS, where the HSS saves the APN and P-GW information.

 The above processing methods also include:

 After receiving the location update request message, the HSS accepts the location update request of the MME according to the emergency indication carried therein, records the MME currently attached by the UE, and registers the UE as an urgently registered UE.

 The above processing methods also include:

 After receiving the location update request message, the HSS detects a restricted state of the user, and if the public land mobile network (PLMN) of the UE is found to have limited access or limited wireless access, the location is obtained according to the emergency indication. When the update request type is emergency registration, the location update request of the MME is accepted, and the UE is registered as an emergency registered UE.

 The above processing methods also include:

 After receiving the location update request message, the HSS detects a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the radio access is restricted, the location update of the MME is rejected in the location update reply. request.

 The above processing methods also include:

 When the MME sends the information about the APN and the P-GW connected to the UE to the HSS, the MME also carries the emergency identifier, and the HSS saves the information of the APN and the P-GW according to the emergency identifier, and registers the UE as an emergency. Registered UE.

 The above processing method can also have the following characteristics:

The first subscription information directly indicates that the UE has non-3GPP access network subscription information, or the first subscription information is subscription data related to the non-3GPP access network of the UE, or The first subscription information is all subscription data of the UE.

 The above processing methods also include:

 If the first subscription information is all subscription data of the UE, the MME determines, according to the all subscription data, whether the UE has non-3GPP access network subscription information.

 The above processing method can also have the following characteristics:

 The information of the P-GW is an identifier of the P-GW and/or an IP address of the P-GW;

 The method further includes: when the UE is handed over to the non-3GPP access network, the non-3GPP access network acquires information of the APN and the P-GW from the HSS, and establishes, by the APN, the A packet data network (PDN) connection of the same P-GW.

 In order to solve the above technical problem, the present invention provides a mobility management entity, where the mobility management entity is configured to: receive an emergency attach request initiated by a UE, and send a location update request message to the HSS after the UE passes the authentication, And carrying an emergency indication in the location update request message.

 In order to solve the above technical problem, the present invention provides an emergency attached processing system, including a UE, an enhanced radio base station (eNodeB), an MME, and an HSS.

 The MME is configured to: receive an emergency attach request initiated by the UE via the eNodeB, to the

After the UE is authenticated, the location update message is sent to the HSS, and the emergency indication is carried in the message. The HSS is configured to: after receiving the location update request message, learn according to the emergency indication carried in the location update request message. If the location update request type is an emergency registration, check whether the UE has non-3GPP access network subscription information, and if yes, send the first subscription information to the MME, where the first subscription information includes at least the UE has a non-3GPP. Information about access network subscription information.

 The above processing system can also have the following characteristics:

 The MME is further configured to: if the UE has the non-3GPP access network subscription information, send the information of the APN and the P-GW connected by the UE to the HSS;

 The HSS is further configured to: save information of the APN and the P-GW.

 The above processing system can also have the following characteristics:

The HSS is further configured to: after receiving the location update request message, accept the location update request of the MME according to the emergency indication carried therein, and record the MME currently attached by the UE, And registering the UE as an emergency registered UE.

 The above processing system can also have the following characteristics:

 The HSS is further configured to: after receiving the location update request message, detecting a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the wireless access is restricted, the location update request is obtained according to the emergency indication. If the type is emergency registration, the location update request of the MME is accepted, and the UE is registered as an emergency registered UE.

 The above processing system can also have the following characteristics:

 The HSS is further configured to: after receiving the location update request message, detecting a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the wireless access is restricted, rejecting the Location update request of the MME.

 The above processing system can also have the following characteristics:

 The MME is further configured to: when transmitting the information of the APN and the P-GW connected by the UE to the HSS, carrying the emergency identifier;

 The HSS is further configured to: save information about the APN and the P-GW according to the emergency identifier, and register the UE as an urgently registered UE.

 The present invention further provides a home subscriber server, which is configured to: after receiving the location update request message carrying the emergency indication, and knowing that the location update request type is emergency registration according to the emergency indication, checking whether the user equipment (UE) has a non- The 3rd Generation Partnership Project (3GPP) access network subscription information, if yes, sending the first subscription information to the mobility management entity, where the first subscription information includes at least information that the UE has non-3GPP access network subscription information

 The present invention can avoid the problem that the HSS rejects the normal registration of the UE during the emergency attach process, does not download the subscription data of the UE to the MME, and causes the handover failure of the UE when the UE switches to the non-3GPP access network, and the emergency service is discontinuous. Ensure the continuity of emergency services and improve the reliability of the network. BRIEF abstract

1 is a main network element involved in an emergency call by a UE or a mobile station (MS) for accessing an IMS through an EPS; 2 is a flow chart of prior art emergency attachment;

 3 is a flow chart of emergency attachment according to Embodiment 1 of the present invention;

 4 is a flow chart of emergency attachment according to Embodiment 2 of the present invention. Preferred embodiment of the invention

 In the present invention, the MME receives the emergency attach request initiated by the UE, sends a location update request message to the HSS after the UE passes the authentication, and carries an emergency indication in the location update request message, where the emergency indication is used. The location update request type is an emergency registration. The HSS receives the location update request message carrying the emergency indication, and according to the emergency indication, the location update request type is an emergency registration, and then checks whether the UE has non-3GPP access network subscription information. If yes, the first subscription information is sent to the MME, and the first subscription information includes at least information that the UE has non-3GPP access network subscription information.

 After the MME learns that the UE has non-3GPP access network subscription information, the MME sends the information of the APN and the P-GW connected to the UE to the HSS, and the HSS saves the information of the APN and the P-GW.

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

 Embodiment 1

 As shown in FIG. 3, the emergency attach process of the first embodiment of the present invention includes the following steps:

 Step 301: The UE sends an emergency attach request to the MME, where the request is sent by the eNodeB, where the user identity IMSI is included;

 Step 302: The MME initiates the authentication of the UE to the HSS, and establishes a secure connection between the UE and the MME. The IMSI is valid in the HSS, and the authentication is passed.

 Step 303: The MME sends a location update request message to the HSS, requesting the HSS to register that the UE is currently attached to the MME, where the location update request message carries an emergency indication, where the emergency indication is used to indicate that the location update request type is an emergency registration;

Step 304: The HSS registers the UE as an urgently registered UE, checks that the UE has non-3GPP access network subscription information, and sends a location update response to the MME, where the first subscription information is included, and the first subscription information includes the UE. Information with non-3GPP access network subscription information; Specifically, after receiving the location update request message, the HSS accepts the location update request of the MME according to the emergency indication carried in the HSS, records the MME currently attached by the UE, and registers the UE as an emergency registration. The UE, the UE is configured to have non-3GPP access network subscription information, and send a location update response to the MME, where the first subscription information is included, and the first subscription information includes information that the UE has non-3GPP access network subscription information;

 Or, after receiving the location update request message, the HSS detects a restricted state of the user, and if the PLMN access of the UE is restricted or the wireless access is restricted, the location update request type is known as an emergency registration according to the emergency indication. And receiving the location update request of the MME, registering the UE as an emergency registration UE, checking that the UE has non-3GPP access network subscription information, and sending a location update response to the MME, where the first subscription information is included, where the A subscription information includes information that the UE has non-3GPP access network subscription information;

 The first subscription information includes the information that the UE has the non-3GPP access network subscription information, and the specific information may be: the first subscription information directly indicates that the UE has non-3GPP access network subscription information (ie, at the location) The update message directly indicates that the UE has non-3GPP access network subscription information); or the first subscription information is subscription data related to the non-3GPP access network of the UE; or the first subscription information is All the contract data of the UE.

 Step 305: The MME continues to establish an emergency bearer for the UE, and initiates an emergency bearer setup request to the SAE-GW.

 Step 306: Complete an emergency bearer setup from the UE to the SAE-GW, and notify the UE that the emergency attach is completed.

 Step 307: The MME sends a notification request (Notify Request) to the HSS according to the indication received in step 304, and sends the information of the ΑΡΝ and P-GW (ie, the ID and/or IP address of the P-GW) to the HSS, and the HSS saves The above information;

 When the HSS is sent to the MME for all the subscription data of the UE, the MME needs to determine, according to the subscription data, that the UE has the non-3GPP access network subscription information, and sends the information of the APN and the P-GW to the HSS;

Step 308: After receiving the information of the APN and the P-GW, the HSS saves the information in the database corresponding to the UE, and returns a notification reply. Non-3GPP access when the UE switches to a non-3GPP access network The network can obtain the information of the APN and the P-GW from the HSS, thereby establishing a PDN connection to the same P-GW represented by the APN for the UE, and implementing emergency service continuity.

Embodiment 2

 As shown in FIG. 4, the emergency attach process of the second embodiment of the present invention includes the following steps:

 Step 401: The UE sends an emergency attach request to the MME, where the request is sent by the eNodeB, where the user identity IMSI is included;

 Step 402: The MME initiates the authentication of the UE to the HSS, and establishes a secure connection between the UE and the MME. The IMSI is valid in the HSS, and the authentication is passed.

 Step 403: The MME initiates a location update request message to the HSS, requesting the HSS to register that the UE is currently attached to the MME.

 Step 404: After receiving the location update request message, the HSS detects a restricted state of the user. If the PLMN access of the UE is restricted or the radio access is restricted, the HSS checks that the UE has non-3GPP access network subscription information. Determining the location update request of the MME in the location update response, where the location update response includes the first subscription information, where the first subscription information includes information that the UE has non-3GPP access network subscription information;

 The first subscription information includes the information that the UE has the non-3GPP access network subscription information, and the specific information may be: the first subscription information directly indicates that the UE has non-3GPP access network subscription information (ie, at the location) The update message directly indicates that the UE has non-3GPP access network subscription information); or the first subscription information is subscription data related to the non-3GPP access network of the UE; or the first subscription information is All the contract data of the UE.

 Step 405: The MME continues to establish an emergency bearer for the UE, and initiates an emergency bearer setup request to the SAE-GW.

 Step 406: Complete an emergency bearer setup from the UE to the SAE-GW, and notify the UE that the emergency attach is completed.

 Step 407: The MME sends a notification request to the HSS according to the indication received in step 404, and sends the information of the APN and the P-GW to the HSS, and carries the emergency identifier.

When the HSS sends all the subscription data of the UE to the MME, the MME needs to sign according to the foregoing. The data is judged to have the non-3GPP access network subscription information, and the information of the APN and the P-GW is sent to the HSS, and the emergency identifier is carried at the same time;

 Step 408: After receiving the information of the APN and the P-GW, the HSS saves the APN and the P-GW ID in the database corresponding to the UE, and registers the UE as an emergency registration. UE, returns a notification reply. When the UE switches to the non-3GPP access network, the non-3GPP access network may acquire the information of the APN and the P-GW from the HSS, thereby establishing a PDN for the UE to the same P-GW represented by the APN. Connect for emergency business continuity.

The MME of the embodiment of the present invention is configured to receive an emergency attach request initiated by the UE, where

After the UE is authenticated, the location update request message is sent to the HSS, and the emergency update request is carried in the location update request message, where the emergency indication is used to indicate that the location update request type is emergency registration.

 The HSS of the embodiment of the present invention is configured to: after receiving the location update request message carrying the emergency indication, according to the emergency indication, to learn that the location update request type is an emergency registration, check whether the UE has non-3GPP access network subscription information, and if so, And transmitting the first subscription information to the mobility management entity, where the first subscription information includes at least information that the UE has non-3GPP access network subscription information.

 The emergency attachment processing system of the embodiment of the present invention includes a UE, an eNodeB, an MME, and an HSS, where the MME is configured to receive an emergency attach request initiated by the eNodeB, and send a location to the HSS after the UE passes the authentication. Updating the message and carrying an emergency indication in the message;

 After receiving the location update request message, the HSS, according to the emergency indication carried in the location update request message, learns that the location update request type is an emergency registration, and checks whether the UE has non-3GPP access network subscription information. If yes, the first subscription information is sent to the MME, and the first subscription information includes at least information that the UE has non-3GPP access network subscription information.

 And the MME is further configured to: send the information about the APN and the P-GW that the UE connects to the HSS; and the HSS is further used to save the APN and the P- GW information.

The HSS is further configured to: after receiving the location update request message, carry the An emergency indication, accepting a location update request of the MME, recording an MME currently attached by the UE, and registering the UE as an emergency registered UE.

 The HSS is further configured to: after receiving the location update request message, detect a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the wireless access is restricted, the location update request type is obtained according to the emergency indication. For emergency registration, the location update request of the MME is accepted, and the UE is registered as an emergency registered UE.

 The HSS is further configured to: after receiving the location update request message, detect a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the radio access is restricted, the MME is rejected in the location update reply. Location update request.

 And the MME is further configured to: when the information about the APN and the P-GW that are connected to the UE is sent to the HSS, the emergency identifier is also carried; the HSS is further configured to save the information about the APN and the P-GW according to the emergency identifier. And registering the UE as an emergency registered UE.

It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention.

 One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

 The present invention can avoid the problem that the HSS rejects the normal registration of the UE during the emergency attach process, does not download the subscription data of the UE to the MME, and causes the handover failure of the UE when the UE switches to the non-3GPP access network, and the emergency service is discontinuous. Ensure the continuity of emergency services and improve the reliability of the network.

Claims

Claim 1. A method of delivering an emergency indication, comprising:  The mobility management entity (MME) receives an emergency attach request initiated by the user equipment (UE), and after the UE is authenticated, sends a location update request message to the home subscriber server (HSS), and in the location update request message. Carry an emergency instruction.  2. An emergency attachment treatment method, including:  Receiving, by the home subscriber server (HSS), a location update request message carrying an emergency indication, according to the emergency indication, checking whether the user equipment (UE) has non-3rd Generation Partnership Project (3GPP) access network subscription information, and if so, Sending the first subscription information to the mobility management entity (MME), where the first subscription information includes information that the UE has non-3GPP access network subscription information.  3. The method of claim 2, further comprising:  And the MME learns that the UE has non-3GPP access network subscription information, and sends information about an access point name (APN) and a packet data network gateway (P-GW) connected by the UE to the HSS, where the HSS saves the APN and P-GW information.  4. The method of claim 3, further comprising:  After receiving the location update request message, the HSS accepts the location update request of the MME according to the emergency indication carried therein, records the MME currently attached by the UE, and registers the UE as an urgently registered UE.  5. The method of claim 3, further comprising:  After receiving the location update request message, the HSS detects a restricted state of the user, and if the public land mobile network (PLMN) access of the UE is found to be restricted or the wireless access is restricted, the location is obtained according to the emergency indication. When the update request type is emergency registration, the location update request of the MME is accepted, and the UE is registered as an emergency registered UE.  6. The method of claim 3, further comprising: After receiving the location update request message, the HSS detects a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the radio access is restricted, the location update of the MME is rejected in the location update reply. request. 7. The method of claim 6 further comprising:  When the MME sends the information about the APN and the P-GW connected to the UE to the HSS, the MME also carries the emergency identifier, and the HSS saves the information of the APN and the P-GW according to the emergency identifier, and registers the UE as an emergency. Registered UE.  8. The method according to any one of claims 2 to 7, wherein  The first subscription information directly indicates that the UE has non-3GPP access network subscription information, or the first subscription information is subscription data related to the non-3GPP access network of the UE, or the first subscription The information is all subscription data of the UE.  9. The method of claim 8 further comprising:  If the first subscription information is all subscription data of the UE, the MME determines, according to the all subscription data, whether the UE has non-3GPP access network subscription information.  10. The method according to any one of claims 3 to 7, wherein  The information of the P-GW is an identifier of the P-GW and/or an IP address of the P-GW;  The method further includes: when the UE switches to a non-3GPP access network, the non-3GPP access network acquires information of the APN and the P-GW from the HSS, and establishes, by the APN, the APN. Connect to the packet data network (PDN) of the same P-GW.  A mobility management entity, configured to: receive an emergency attach request initiated by a user equipment (UE), and send a location update request message to a home subscriber server (HSS) after the UE passes the authentication, and The location update request message carries an emergency indication.  12. An emergency attached processing system, including user equipment (UE), enhanced wireless base station (eNodeB), Mobility Management Entity (MME) and Home Subscriber Server (HSS); The MME is configured to: receive an emergency attach request initiated by the UE via the eNodeB, send a location update message to the HSS after the UE passes the authentication, and carry an emergency indication in the message; the HSS is set as: After the location update request message, according to the emergency indication carried in the location update request message, the location update request type is an emergency registration, and the UE is checked whether the UE has non-3GPP access network subscription information, and if yes, the first subscription is sent. The information is sent to the MME, and the first subscription information includes at least information that the UE has non-3GPP access network subscription information. 13. The system of claim 12, wherein  The MME is further configured to: if the UE has the non-3GPP access network subscription information, send the information of the APN and the P-GW connected by the UE to the HSS;  The HSS is further configured to: save information of the APN and the P-GW.  14. The system of claim 13 wherein  The HSS is further configured to: after receiving the location update request message, accept the location update request of the MME according to the emergency indication carried therein, record the MME currently attached by the UE, and register the UE as an emergency registration. UE.  15. The system of claim 13 wherein  The HSS is further configured to: after receiving the location update request message, detecting a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the wireless access is restricted, the location update request is obtained according to the emergency indication. If the type is emergency registration, the location update request of the MME is accepted, and the UE is registered as an emergency registered UE.  16. The method of claim 13 wherein  The HSS is further configured to: after receiving the location update request message, detecting a restricted state of the user, and if the PLMN access of the UE is found to be restricted or the wireless access is restricted, rejecting the Location update request of the MME.  17. The method of claim 16 wherein  The MME is further configured to: when transmitting the information of the APN and the P-GW connected by the UE to the HSS, carrying the emergency identifier;  The HSS is further configured to: save information about the APN and the P-GW according to the emergency identifier, and register the UE as an urgently registered UE.  18. A home subscriber server, configured to: after receiving the location update request message carrying the emergency indication, and determining, according to the emergency indication, that the location update request type is an emergency registration, checking whether the user equipment (UE) has a non-third The partner network plan (3GPP) access network subscription information, if yes, the first subscription information is sent to the mobility management entity, and the first subscription information includes at least information that the UE has non-3GPP access network subscription information.