WO2010127529A1

WO2010127529A1 - Method for establishing ip multimedia subsystem service and thereof system

Info

Publication number: WO2010127529A1
Application number: PCT/CN2009/074021
Authority: WO
Inventors: 朱春晖; 宗在峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-05-07
Filing date: 2009-09-18
Publication date: 2010-11-11
Also published as: CN101730039B; CN101730039A

Abstract

A method for establishing IP multimedia subsystem service is provided in the invention, the method includes: after a mobility management entity MME has established an emergency carrier for a user equipment UE, it sends an IP address corresponded to the emergency carrier to a home subscriber server HSS, and informs the HSS that the IP address is a IP address used in the emergency carrier; the HSS records in local that the IP address is a IP address used in the emergency carrier; the HSS informs an interrogating call session control function I-CSCF that the IP address is a IP address used in the emergency carrier, and/or informs an proxy call session control function P-CSCF through the I-CSCF that the IP address is a IP address used in the emergency carrier. By using the invention, after the emergency carrier of the UE has established, a IMS network element can timely get the IP address corresponded to the emergency carrier, it is avoided effectively that the UE initiates a IMS natural service by using the emergency carrier.

Description

Method and system for establishing IP multimedia subsystem service

Technical field

The present invention relates to the field of communications, and in particular, to a method and system for establishing a multimedia subsystem service of an Internet Protocol (IP).

Background technique

The IP Multimedia Core Subsystem (IMS) is the core of the new generation of communication networks. It uses the Session Initiation Protocol (SIP) system. SIP is independent of access and has many functions such as separation of media service control functions from bearer separation, call and session separation, application and service separation, service and network separation, and convergence of mobile network and Internet services.

Since IMS is independent of access, emergency services (EMC, Emergency Call) under IMS can be built on a general packet radio service (GPRS) network and a system architecture evolution (SAE) network to provide uniformity. Emergency call control.

Figure 1 shows the main network elements involved in the emergency call of the user equipment (UE, User Equipment) accessing the IMS through the SAE; wherein the solid line indicates signaling and the dotted line indicates the user's IP channel.

As shown in Figure 1, the main network elements involved in the emergency call of the UE to access the IMS through the SAE include: the network element of the SAE network part, the network element of the location service (LCS) part, and the network element of the IMS emergency service part. .

The network element of the SAE network part is configured to provide the underlying bearer management and mobility management. The network elements of the SAE network part include: an enhanced radio base station (eNodeB), a mobility management entity (MME, Mobility Management Entity), and a user plane data routing processing network element (SAE GW); the SAE GW includes a packet data network gateway (P -GW, Packet Data Network Gateway) and Service Gateway (S-GW, Serving GW).

The MME is responsible for managing and storing the context of the UE (eg, UE identity/user identity, mobility management state, user security parameters, etc.), assigning a temporary identity to the user, when the UE is camped in the tracking area When the domain or network is used, it is responsible for authenticating the UE.

The P-GW is a mobility anchor in the SAE system. It is a border gateway between the SAE and the Packet Data Network (PDN). It is responsible for PDN access and forwarding data between the SAE and the PDN.

The Policy and Charging Control (PCC) network element is set to establish effective policy and charging control at the underlying carrier layer and the upper layer. The PCC network element includes: a Policy and Charging Rules Function (PCRF), and a Policy and Charging Enforcement Function (PCEF).

Among them, the PCRF is an important functional entity of the PCC architecture, and is set to acquire, assemble, and deliver control policies and charging rules. PCEF is the implementation point of specific policy and charging, usually located in the GW (Gateway) function; in the SAE network, the PCEF function is located in the P-GW.

The network element of the LCS part is set to the address of the emergency call providing location service and Public Safety Answering Point (PSAP). The network elements in the LCS part include: a Location Require Function (LRF), which is a logical functional entity defined in the emergency call architecture to provide users with emergency call session control functions (E-CSCF, Emergency-CSCF). Location, and find the appropriate PSAP based on the location. Gateway The Mobile Location Center (GMLC) is the main function point for providing user location functions in the core network; usually, the LRF is part of the GMLC.

The network element of the IMS emergency service part is set to control and process the session of the emergency call. The network elements of the IMS emergency service part include:

Home Subscriber Server (HSS), which is mainly set to manage user subscription data, located in the home network;

The Call Session Control Function (CSCF) is the core network element that controls the session process. The CSCF includes the Proxy Call Session Control Function (P-CSCF, Proxy-CSCF), and the Call Session Control Function (I-CSCF, Interrogating). -CSCF), Serving Call Session Control Function (S-CSCF, Serving-CSCF), E-CSCF. Among them, the E-CSCF is the session control center of the emergency call, which determines which PSAP the emergency call should be routed to.

For a UE in restricted mode (for example, the UE is in arrears or the UE's area is restricted, etc.) To initiate an emergency call, you need to perform the following steps:

Step 1: Establish an emergency bearer;

The UE initiates an emergency attach, that is, when the UE initiates the normal attach, the emergency service identifier is carried to notify the bearer network that the current attachment is for the emergency call; after the bearer network receives the emergency attach request of the UE, the emergency access point name is passed. -APN, Emergency Access Point Name) to establish a default bearer dedicated to emergency calls. This default bearer is mainly used for signaling control.

Step 2, initiate an emergency call;

The UE initiates an emergency call, that is, by carrying an emergency service identifier in a normal INVITE message, indicating that the call request is an emergency call; the UE fills in the emergency number in the called number, and if the UE is in the visited place, the emergency The number is the emergency number of the visited place; the emergency call is routed to the E-CSCF, and the E-CSCF queries the LRF for the address of the PSAP; the LRF determines which PSAP to serve the UE by querying the location information of the UE; the E-CSCF is obtained After the PSAP address, the call is routed to the PSAP.

FIG. 2 illustrates a process in which a UE with normal subscription and unrestricted access initiates an emergency bearer to the SAE in the prior art, and initiates a normal registration in the IMS, including the following steps:

Step 201: The UE sends an emergency attach request or an emergency PDN connection establishment request (collectively referred to as an emergency bearer setup request) to the MME, where the request carries an emergency service identifier.

When the UE initiates an emergency PDN connection establishment request, the UE has normally attached to the SAE network and has a normal PDN connection.

Step 202: The MME selects a P-GW, and initiates a default bearer request to the P-GW to establish an emergency bearer.

Step 203: After receiving the default bearer response sent by the P-GW, the MME returns an emergency attach response or an emergency PDN connection setup response to the UE.

Step 204: The UE initiates a registration request for normal service of the IMS to the P-CSCF by using the established emergency bearer.

Step 205: The P-CSCF sends the registration request of the IMS normal service to the I-CSCF. Step 206: After receiving the registration request sent by the P-CSCF, the I-CSCF initiates a Cx Query/Cx Select Pull (Cx-Query/Cx-Select-Pull) message to the HSS to perform a query of the user/UE status.

Step 207: Since the current subscriber's subscription status in the HSS is normal (this normal state is because the HSS stores information that the UE was successfully registered in the MME before), the HSS will return a response success message to the I-CSCF. : Cx query response / Cx select pull response (Cx-Query Resp / Cx-Select-Pull Resp) message, notify the I-CSCF that the current state of the UE is normal, and can register the normal service of the IMS;

Step 208: The I-CSCF completes the registration process of the IMS normal service subsequent to the UE; after that, the UE can perform normal IMS service.

In the process shown in FIG. 2, the UE establishes an emergency bearer by urgently attaching to the SAE network or by establishing an emergency PDN connection to the SAE network, but uses the emergency bearer to perform non-emergency IMS normal service on the IMS network; Will lead to the following problems:

(1) The SAE is inconsistent with the user data in the IMS, that is, the UE is recorded in the SAE network to establish an emergency bearer, and the IMS network records that the UE is performing normal IMS service;

(2) The IMS normal service will be charged because the emergency service is not charged, which may result in billing errors;

(3) The correct network control cannot be performed.

However, in the prior art, the IMS network element (for example, the HSS, the I-CSCF, and the P-CSCF) cannot use the emergency bearer to initiate the IMS using the emergency bearer because the UE cannot use the emergency bearer to initiate the registration request of the IMS normal service. The registration of the service, and thus the UE cannot use the emergency bearer to perform normal IMS services.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method and system for establishing an IMS service, so that the IMS network element knows whether the UE uses the emergency load when initiating the registration request of the IMS normal service. In order to solve the above problems, the present invention provides a method for establishing an IP multimedia subsystem service. The method includes:

After the MME establishes an emergency bearer for the user equipment UE, the MME sends the IP address corresponding to the emergency bearer to the home subscriber server HSS, and notifies the HSS that the IP address is an IP address used for emergency services.

B. The HSS locally records the IP address as an IP address used for emergency services;

C. The UE initiates a registration request of the IP Multimedia Subsystem IMS normal service by using the IP address, and the HSS, and/or the I-CSCF, and/or the P-CSCF 4 rejects the IP address according to the IP address. Describe the registration request. Further, the step C includes:

Cl, the UE initiates a registration request for the normal service of the IMS to the P-CSCF by using the established emergency bearer;

C2, the P-CSCF sends the registration request to the I-CSCF;

C3, after receiving the registration request, the I-CSCF sends a Cx query or a Cx selection pull message to the HSS to perform a query on a user status; wherein the Cx query or the Cx selection pull message carries Said IP address;

C4. After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and determines that the IP address is used for emergency services. After the IP address, the C-query response response message or the Cx selection pull response message rejecting the registration request is returned to the I-CSCF, and the I-CSCF sends a response message rejecting the registration request to the UE through the P-CSCF. ; and / or

After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the Cx query response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service, where the I - the CSCF sends a response message rejecting the registration request to the UE through the P-CSCF according to the Cx Query Response message or the Cx Select Pull Response message; and/or

After the HSS receives the Cx query message or the Cx selection pull message sent by the I-CSCF, Extracting the IP address included in the message, and returning a Cx query response message or a Cx selection pull response message to the I-CSCF after determining that the IP address is an IP address for emergency service, the Cx query The response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service, and the I-CSCF sends the Cx query response message or Cx selection pull response information to the P-CSCF And the P-CSCF sends a response message rejecting the registration request to the UE according to the Cx query response message or the Cx selection pull response information.

Preferably, the method further comprises:

C5, the P-CSCF records that the IP address is information for an IP address of an emergency service, to reject a registration request for an IMS normal service initiated by using the IP address; and/or

The P-CSCF records a user identifier or a UE identifier of a user who initiates a registration request for an IMS normal service using the IP address to reject an IMS request initiated by using the user identifier or the UE identifier.

Further, the step that the MME establishes an emergency bearer for the UE in the step A includes: a, the UE sends an emergency bearer setup request to the MME, where the emergency bearer setup request carries an emergency service identifier;

A2. The MME parses the packet data network gateway P-GW corresponding to the emergency service identifier by using a domain name system, or selects a P-GW supporting emergency services according to a local configuration, and parses out or selects the P-GW. The GW initiates establishment of a default bearer request to establish an emergency bearer; a3. The parsed or selected P-GW sends a default bearer response to the MME. Preferably, after the step a3, the method further includes: after receiving the establishment of the default bearer response, the MME returns an emergency bearer setup response to the UE. Further, the emergency bearer setup request is an emergency attach request or an emergency packet data network PDN connection establishment request;

Accordingly, the emergency bearer setup response is an emergency attach response or an emergency PDN connection setup response.

Further, the emergency service identifier is an emergency access point name.

Further, the MME is configured to notify the HSS that the IP address is used as follows The IP address of the emergency service:

The MME sends a notification request message to the HSS, where the notification request message includes: the IP address, and the emergency service identifier used to identify the IP address as an IP address for emergency services. The invention also provides an IMS service establishment system, which system comprises an MME, a P-CSCF,

I-CSCF and HSS, where:

The MME is configured to establish an emergency bearer by the UE, and after the emergency bearer is established, send the IP address corresponding to the emergency bearer to the HSS, and notify the HSS that the IP address is an IP address used for the emergency service;

The HSS is configured to locally record that the IP address is an IP address for emergency services; the HSS is further configured to: when the UE initiates a registration request for an IMS normal service by using the IP address, according to the IP address Reject the registration request;

The I-CSCF is configured to reject the registration request according to the IP address when the UE initiates a registration request for an IMS normal service by using the IP address;

The P-CSCF is configured to reject the registration request according to the IP address when the UE initiates a registration request for an IMS normal service using the IP address. Further, the P-CSCF is further configured to: when the UE uses the established emergency bearer to initiate a registration request for the IMS normal service, send the registration request to the I-CSCF; The response message of the registration request is further configured to: according to the Cx query response message or Cx selection pull response information sent by the I-CSCF, including the information that the IP address is an IP address for emergency service, to the UE Sending a reply message rejecting the registration request;

The I-CSCF is further configured to: after receiving the registration request, send a Cx query or a Cx selection pull message to the HSS to perform a query of a user status; wherein the Cx query or the Cx selection pull message carries The IP address is further configured to send, by the P-CSCF, a response message rejecting the registration request to the UE; and further configured to send, by the HSS, information that the IP address is an IP address used for emergency services The Cx query response message or the Cx selection pull response message sends a response message rejecting the registration request to the UE through the P-CSCF; The Cx query response message or the Cx selection pull response message sent by the HSS that includes the IP address is information for the IP address of the emergency service is sent to the P-CSCF;

The HSS is further configured to: after receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, extract the IP address included in the message, and determine that the IP address is used for emergency services. After the IP address, the Cx query response message or the Cx selection pull response message rejecting the registration request is returned to the I-CSCF; and is further configured to receive the Cx query message sent by the I-CSCF or the Cx selection pull message. Extracting the IP address included in the message, and returning a Cx query response message or a Cx selection pull response message to the I-CSCF after determining that the IP address is an IP address for emergency service, the Cx The query response message or the Cx selection pull response message contains information that the IP address is an IP address for emergency services.

Further, the P-CSCF is further configured to record information that the IP address is an IP address used for emergency services, to reject a registration request for an IMS normal service initiated by using the IP address; The user identifier or the UE identifier of the user who initiates the registration request of the IMS normal service to reject the IMS request initiated by using the user identifier or the UE identifier.

Further, the system further includes: a P-GW, where the P-GW is the emergency service identifier that is parsed by the domain name system when the MME sends an emergency bearer setup request carrying an emergency service identifier to the UE a P-GW, or a P-GW supporting emergency services selected according to a local configuration; the P-GW is configured to initiate a default bearer request by the MME to establish an emergency bearer; and is further configured to send to the MME Establish a default bearer response.

In summary, the method and system of the present invention can enable the IMS network element to know the IP address corresponding to the emergency bearer in time after the establishment of the emergency bearer of the UE, and effectively prevent the UE from using the emergency bearer to initiate. IMS normal business. BRIEF abstract

Figure 1 shows the primary network element involved in the emergency call of the UE to access the IMS through the SAE. Figure 2 depicts the establishment of an emergency bearer initiated by the UE with normal subscription and unrestricted access to the SAE in the prior art. The process of initiating normal registration; 3 is a flow chart of a method for establishing an IMS service according to the present invention;

4 is a schematic structural diagram of an IMS service establishment system of the present invention.

Preferred embodiment of the invention

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

3 is a flow chart of a method for establishing an IMS service according to the present invention; FIG. 3 is a flowchart of a process for a UE to establish a SAE emergency bearer, or an SAE emergency service, and use the emergency bearer to initiate registration of an IMS normal service, the method Specifically, the following steps are included:

Step 301: The UE sends an emergency attach request or an emergency PDN connection establishment request (collectively referred to as an emergency bearer setup request) to the MME, where the request carries an emergency service identifier.

Here, the emergency service identifier may be an emergency APN;

Step 302: The MME parses the P-GW corresponding to the emergency APN through the domain name system, or selects a P-GW that supports the emergency service according to the local configuration, and initiates a default bearer request to the P-GW to establish an emergency bearer.

Step 303: After receiving the default bearer response sent by the P-GW, the MME sends a notification request message to the HSS, where the notification request message includes: an IP address of the UE and an emergency service identifier; after receiving the notification request message, the HSS is Locally record the IP address contained in the message as the information of the IP address used for emergency services;

The emergency service identifier is used to indicate that the IP address of the UE is an IP address for emergency service (or the IP address is an IP address of an emergency bearer); the emergency service identifier may be an emergency step 304, and the HSS sends a notification to the MME. The response message indicates that the notification request message of step 303 has been received and has been correctly processed;

Step 305: After receiving the default bearer response sent by the P-GW, the MME returns an emergency attach response or an emergency PDN connection setup response to the UE.

The above steps 303 and 305 may be performed in parallel, or step 305 may be performed first, and then executed. Go to step 303.

Step 306: The UE initiates a registration request of the IMS normal service to the P-CSCF by using the established emergency bearer, and requests to perform normal IMS service.

The foregoing registration request carries: an IP address of the UE, and/or a UE identifier/user identifier.

Step 307: The P-CSCF sends the registration request of the IMS normal service to the I-CSCF. Step 308: After receiving the registration request sent by the P-CSCF, the I-CSCF initiates a Cx query (Cx-Query)/Cx selection to the HSS. Pulling (Cx-Select-Pull) message to query the user status; the above message carries the IP address of the UE;

Step 309: The HSS queries, according to the IP address of the UE, that the IP address is used for emergency services in the SAE, and therefore returns a Cx query response (Cx-Query Resp)/Cx that rejects the user/UE performing IMS normal service registration to the I-CSCF. Select the pull response (Cx-Select-Pull Resp) message;

Optionally, the HSS may send the reason for the rejection (the user initiates the registration of the IMS normal service by using the IP address for the emergency service, or other rejection reasons), and is included in the Cx query response/Cx selection pull response message. Give the I-CSCF.

It should be noted that, since the registration request of the IMS emergency service does not pass through the I-CSCF, when receiving the Cx query/Cx selection pull message sent by the I-CSCF, the HSS knows that the current registration of the IMS normal service is performed.

Step 310: The I-CSCF returns a response message rejecting the UE to perform normal service registration of the IMS to the P-CSCF.

Here, the reason for the rejection of the HSS transmission may be included in the response message and sent to the P-CSCF; Step 311, the P-CSCF returns a response message rejecting the IMS normal service registration to the UE; optionally, the P-CSCF may The IP address is blacklisted, and the registration request for the normal service of the IMS initiated by the IP address is rejected.

In addition, it is generally considered that the user who initiates the IMS normal service registration using the IP address of the emergency bearer is a malicious user (a non-normal user), and therefore the P-CSCF can also initiate the user identity of the user who registers the IMS normal service by using the IP address of the emergency bearer, Or the UE identifier is blacklisted and the subsequent IMS request of the corresponding user is rejected. According to the basic principle of the present invention, the above embodiment may also have various transformation manners, for example:

After receiving the Cx query/Cx selection pull (Cx-Query/Cx-Select-Pull) message of step 308, the HSS may send the information of the IP address included in step 308 to the IP address for emergency service in step 309. The I-CSCF stores the corresponding information, judges that the IP address cannot be used for the IMS normal service based on the information, and instructs the P-CSCF to reject the registration request in step 310.

In addition, the I-CSCF may further notify the P-CSCF that the IP address is an IP address used for emergency services; the P-CSCF may also store corresponding information, and according to the information, determine that the IP address cannot be used for normal IMS services, and In step 311, the normal registration request of the UE is rejected.

4 is a schematic structural diagram of an IMS service establishment system according to the present invention. As shown in FIG. 4, the system includes an MME, a P-GW, a P-CSCF, an I-CSCF, and an HSS;

The MME is configured to interact with the P-GW that supports the emergency service, and establish an emergency bearer for the UE, and after the emergency bearer is established, send the IP address corresponding to the emergency bearer to the HSS;

The HSS is configured to locally record that the IP address is an IP address for emergency services, and/or to notify the I-CSCF that the IP address is an IP address for emergency services, and/or by the I The CSCF notifies the P-CSCF that the IP address is an IP address for emergency services.

After learning that the IP address is an IP address for emergency service, when the UE initiates a registration request for IMS normal service using the IP address, the HSS, or the I-CSCF, or the P-CSCF The registration request can be rejected. For example, the registration request may be rejected in the following manner: after receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and determines at the After the IP address is an IP address for emergency service, return a Cx query response message or a Cx selection pull response message rejecting the registration request to the I-CSCF, where the I-CSCF passes through the P-CSCF Said UE sends a response message rejecting said registration request; or

After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the message includes the IP address being information of an IP address for emergency service, and the I-CSCF passes the P according to the information. The CSCF sends a response message rejecting the registration request to the UE. The network elements in the IMS service establishment system of the present invention and the connection relationship (message interaction relationship) between the network elements are briefly described. For detailed functions of each network element included in the system, refer to the description of the method shown in FIG. 3 above.

The above is only the preferred embodiment of the invention and is not intended to limit the invention. Any modifications and variations made by those skilled in the art in light of the present invention are within the scope of the appended claims.

Industrial applicability

The invention can enable the IMS network element to know the IP address corresponding to the emergency bearer in time after the establishment of the emergency bearer of the UE, which effectively prevents the UE from using the emergency bearer to initiate the normal service of the IMS, and therefore has strong industrial applicability.

Claims

Claim

1. A method for establishing an IP multimedia subsystem service, the method comprising:

C. The UE initiates a registration request of the IP Multimedia Subsystem IMS normal service by using the IP address, and the HSS, and/or the I-CSCF, and/or the P-CSCF 4 rejects the IP address according to the IP address. Describe the registration request.

2. The method of claim 1, wherein the step C comprises:

C2, the P-CSCF sends the registration request to the I-CSCF;

After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the Cx query response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service, where the I - the CSCF sends a response message rejecting the registration request to the UE through the P-CSCF according to the Cx query response message or Cx selection pull response information; and / or

After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the Cx query response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service, where the I Sending, by the CSCF, the Cx query response message or the Cx selection pull response information to the P-CSCF, where the P-CSCF sends a request to the UE to reject the registration request according to the Cx query response message or the Cx selection pull response information. Reply message.

3. The method according to claim 2, wherein after the step c4, the method further comprises:

4. The method of claim 1, wherein

The step of the MME establishing an emergency bearer for the UE in the step A includes:

The UE sends an emergency bearer setup request to the MME, where the emergency bearer setup request carries an emergency service identifier.

A2. The MME parses the packet data network gateway P-GW corresponding to the emergency service identifier by using a domain name system, or selects a P-GW supporting emergency services according to a local configuration, and parses out or selects the P-GW. The GW initiates establishment of a default bearer request to establish an emergency bearer; a3. The parsed or selected P-GW sends a default bearer response to the MME.

The method of claim 4, wherein, after the step a3, the method further comprises: after receiving the establishing a default bearer response, the MME returns an emergency bearer setup response to the UE.

6. The method according to claim 5, wherein the emergency bearer setup request is an emergency attach Request or emergency packet data network PDN connection establishment request;

Correspondingly, the emergency bearer setup response is an emergency attach response or an emergency PDN connection setup interface.

7. The method of claim 4, wherein

The emergency service identifier is an emergency access point name.

8. The method according to any of claims 4-7, wherein

The MME is configured to notify the HSS that the IP address is an IP address for emergency services by:

The MME sends a notification request message to the HSS, where the notification request message includes: the IP address, and the emergency service identifier used to identify the IP address as an IP address for emergency services.

9. An IMS service setup system, the system comprising an MME, a P-CSCF, an I-CSCF and an HSS, wherein:

The P-CSCF is configured to reject the registration request according to the IP address when the UE initiates a registration request for an IMS normal service using the IP address.

10. The system of claim 9, wherein

The P-CSCF is further configured to: when the UE uses the established emergency bearer to initiate a registration request for the IMS normal service, send the registration request to the I-CSCF; Sending a response message rejecting the registration request; and setting the Cx query response message or the Cx selection pull response message according to the information sent by the I-CSCF that the IP address is an IP address for emergency service Sending a response message rejecting the registration request to the UE;

The I-CSCF is further configured to: after receiving the registration request, send a Cx query or a Cx selection pull message to the HSS to perform a query of a user status; wherein the Cx query or the Cx selection pull message carries The IP address is further configured to send, by the P-CSCF, a response message rejecting the registration request to the UE; and further configured to send, by the HSS, information that the IP address is an IP address used for emergency services The Cx query response message or the Cx selection pull response message sends a response message rejecting the registration request to the UE through the P-CSCF; and is further configured to send the IP address including the IP address for emergency The Cx query response message or Cx selection pull response information of the information of the IP address of the service is sent to the P-CSCF;

11. The method of claim 10, wherein the P-CSCF is further configured to record the

The IP address is information for the IP address of the emergency service to reject the registration request of the IMS normal service initiated by using the IP address; and is also set to record the user identifier of the user who uses the IP address to initiate the registration request of the IMS normal service. Or the UE identity to reject the IMS request initiated by using the user identity or the UE identity.

The method of claim 9, wherein the system further comprises: a P-GW, wherein the P-GW passes the domain name system when the MME sends an emergency bearer setup request carrying an emergency service identifier to the UE Parsing the P-GW corresponding to the emergency service identifier, or the P-GW supporting the emergency service selected according to the local configuration; the P-GW is configured to initiate a default bearer request to the MME to establish an emergency Bearer; is further configured to send a setup default bearer response to the MME.