CN1972320B - Method for obtaining geographical location information of fixed network access user terminal in packet network - Google Patents

Abstract

The invention discloses a method for a packet network to obtain geographic location information of a packet user terminal accessed by a fixed network and a method for a packet network to obtain the geographic location information of a traditional user terminal accessed by a fixed network. Both methods use the access information database to pre-save the correspondence between network location information and geographic location information; obtain bearer control information when accessing the bearer control network, and send the bearer control information and network location information to the access information The access information database determines the relationship between bearer control information and geographic location information according to the corresponding relationship between geographical location information and network location information and the corresponding relationship between bearer control information and Control information, query the access information database to obtain geographic location information. The method of the invention clarifies the specific implementation process of relevant network entities in the IP access network and the packet core network, and can be directly applied in practice.

Description

Method for obtaining geographical location information of fixed network access user terminal in packet network

technical field

The invention relates to a technology for obtaining relevant information of user terminals by a packet network, and in particular to a method for obtaining geographical position information of packet user terminals and traditional user terminals accessed by a fixed network through a packet network.

Background technique

At present, with the continuous maturity of packet technology, the traditional telecommunication network based on circuit switching is developing towards the broadband telecommunication network based on packet switching. Many operators have established a packet telecommunication network, and user terminals can access the telecommunication network through the packet network. In the packet network, users can use the same user ID to access the telecommunication network through the packet network in different geographical locations. In this case, in order to meet different service requirements, the telecommunication network must be able to obtain the geographic location information of the user terminal .

For example, in an emergency business situation, the telecommunications network needs to route the call to the most suitable public safety access point (PSAP) according to the geographical location information of the calling user, and the public safety access point (PSAP) according to the geographical location information of the calling user Transfer the call to the most suitable emergency call center (ECC), and the ECC will quickly provide assistance to the caller.

First introduce a network structure in which user terminals access the packet network through a fixed network to realize an emergency call. The present invention is an improvement under this network structure, and its structural diagram is as shown in Figure 1:

There are two types of user terminals: traditional user terminals 100 and packet user terminals 110 . The traditional user terminal 100 can access the user access gateway 120 through ISDN, and then access the packet network. The packet user terminal 110 can be an IP phone or a computer terminal, and they can be directly connected to the packet network through ADSL or Ethernet.

The packet network is composed of two parts, one is the packet bearer control network 130, which provides the control function of the bearer, and the other is the packet core network 140 with SIP as the call control signaling, such as the IP multimedia core network subsystem (IMS) domain, PSTN/ISDN Emulation Subsystem (PES) domain, which provides session control functions.

The packet user terminal first accesses the bearer control network 130 through the bearer control unit 131 , and then accesses the packet core network 140 through the network access unit 141 .

The user access gateway 120 completes the function of the traditional user terminal 100 to access the packet network. Like the packet user terminal, the user access gateway 120 first needs to access the packet bearer control network 130 to obtain the packet bearer capability, and then pass the packet bearer control network 130 accesses the packet core network 140 to realize the session service capability.

The bearer control access unit 131 provides the bearer access function of the packet user terminal and the user access gateway 120, and implements functions such as IP address allocation.

The access information database 132 saves the information of the bearer layer users accessing the packet bearer control network 130 , such as the user's corresponding access mode, line identification, etc., and it needs to collect information from the bearer control access unit 131 .

The network access unit 141 is a network node that provides user terminals with functions such as registration, authentication, and authentication for accessing the packet core network 140, and registers the user terminal with a different call session control unit 142. When the user terminal initiates a call, the network access Unit 141 routes the call to the call session control unit 142 to which it is registered. When the network access unit 141 and the call session control unit 142 are different network entities, the interface between them is a SIP interface. When the network access unit 141 and the call session control unit 142 are the same network entity, their interface is a SIP interface or a self-defined internal interface. The network access unit 141 obtains user layer information from the access information database 132 .

The call session control unit 142 provides functions such as call control and routing connection for registered users accessing the packet core network 140. It can trigger the call to the service control unit 144, and can also route the call to other call session control units through the SIP protocol. The figure is omitted.

The service control unit 144 provides various service logic control functions for registered users accessing the packet core network 140, and is the host execution environment of various services. When the service control unit 144 and the call session control unit 142 are different network entities, the interface between the two is a SIP interface; when the service control unit 144 and the call session control unit 142 are the same network entity, the interface is a SIP interface or a custom interface internal interface.

There may be multiple service control units 144 processing different services in the packet core network 140 .

The media gateway control unit 143 provides interworking control functions for mutual calls between registered users accessing the packet core network 140 and the traditional circuit network. The content of the present invention does not involve the media gateway control unit 143, and will not be described in detail below.

In the network shown in FIG. 1 , in order to meet service requirements such as emergency services, the packet network must be able to obtain geographic location information of user terminals.

Among them, IMS is a system in the Wideband Code Division Multiple Access (WCDMA) network defined by the 3GPP R5/R6 standard. It is the target network for 3G mobile networks to realize packet voice and packet data and provide unified multimedia services and applications. It is a subsystem of the service layer in the next generation network (NGN) architecture defined by TISPAN.

TR 23.867 defines the implementation scheme of emergency calls under IMS, which includes the method of obtaining the geographic location information of user terminals, and describes it for fixed network access.

Referring to FIG. 2 , FIG. 2 is a schematic flow diagram of the protocol in which the packet network obtains the geographic location information of the fixed network access user terminal. The process includes the following steps:

In step 201, the user terminal initiates an emergency call (Init.Emerg.Call).

Step 202, the user terminal sends an emergency call service request (INVITE) to the IMS core network.

In step 203, the IMS core network sends a request (Retrieve Location) to obtain the geographic location information of the user terminal to the location service function entity (LRF).

In step 204, the LRF sends a request (Retrieve Location) to obtain the geographic location information of the user terminal to the IP access network (IP-CAN).

In step 205, the IMS core network sends a request (Retrieve Location) to obtain the geographic location information of the user terminal to the IP-CAN.

The above steps 203-205 are the process in which the IMS core network sends a request to obtain the geographic location information of the user terminal.

In step 206, the IP-CAN returns the geographic location information (ReturnLocation) of the user terminal to the LRF.

In step 207, the LRF returns the location information (ReturnLocation) of the user terminal to the IMS core network.

In step 208, the IP-CAN returns the location information (ReturnLocation) of the user terminal to the IMS core network.

In step 209, the IMS core network sends an emergency service request (INVITE) carrying geographic location information of the user terminal to the emergency call center (ECC).

Among them, the geographic location information returned by IP-CAN can be expressed in a standard address information format, such as LIF, or in text containing country, city, and street information, or described in other formats.

Then, the emergency call setup is completed.

In this way, the ECC in the IMS domain can obtain the geographic location information of the user terminal that initiates the emergency call request.

It can be seen from the process in Figure 2 that when a user terminal accesses the IMS through a fixed network, the IMS should obtain geographic location information from the IP-CAN, but how the IMS obtains the geographic location information from the IP-CAN is not given in the existing protocol. The specific implementation method prevents the process from being directly applied to practice, which hinders the popularization and application of the technology.

Contents of the invention

In view of this, the first main purpose of the present invention is to provide a method for the packet network to obtain the geographical location information of the packet user terminal accessed by the fixed network, which clearly defines the IP access network and the relevant network in the packet core network. The specific implementation process of the entity can be directly applied to practice.

The main purpose of the present invention is to provide a method for the packet network to obtain the geographic location information of the traditional user terminal accessed by the fixed network. The method clarifies the specific implementation process of the relevant network entities in the IP access network and the packet core network, and can directly applied to practice.

In order to achieve one aspect of the above object, the present invention provides a method for a packet network to obtain geographical location information of a packet user terminal connected to a fixed network. The method uses an access information database to pre-store the corresponding relationship between network location information and geographic location information ; The process for the packet network to obtain the geographic location information of the packet user terminal accessed by the fixed network includes the following steps:

A. When the user terminal accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user terminal, and provides the bearer control information to the user terminal;

B. The bearer control access unit binds the bearer control information of the user terminal with the network location information of the user terminal and sends it to the access information database;

C. The access information database binds the corresponding relationship between the bearer control information of the user terminal and the geographical location information according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the bearer control information of the user terminal and the network location information;

D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user terminal according to the bearer control information of the user terminal.

Wherein, the bearer control information may at least include: bearer access network information and an IP address allocated for the user terminal or a bearer control layer user identifier;

The step B is: the bearer control access unit binds the IP address of the user terminal with the network location information of the user terminal and sends it to the access information database, or links the user identification of the bearer control layer with the network location information of the user terminal Bind and send to the access information database;

The step C is: accessing the information database according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the IP address of the user terminal and the network location information or the binding relationship between the bearer control layer user identifier and the network location information, Binding the corresponding relationship between the IP address of the user terminal and the geographic location information or the corresponding relationship between the bearer control layer user identifier and the geographic location information;

The step D is: the functional entities in the packet network query the access information database to obtain the geographical location information of the user terminal according to the IP address of the user terminal or the bearer control layer user identifier.

In the step A, the bearer control access unit may provide bearer control information to the user terminal by using the extended DHCP protocol.

Said step D may comprise:

D1. The functional entity in the packet network receives the message carrying the bearer access network information sent by the user terminal, and determines the address of the access information database according to the bearer access network information;

D2. The functional entity in the packet network sends a query request including the IP address of the user terminal or the bearer control layer user identifier to the access information database according to the address of the access information database;

D3. The access information database is according to the IP address of the user terminal in the received query request or the bearer control layer user identifier, according to the corresponding relationship between the bound IP address of the user terminal and the geographic location information or the bearer control layer user identifier and The corresponding relationship of the geographic location information obtains the address location information of the user terminal and returns it to the functional entity in the packet network.

The bearer access network information may include an access information database address;

In the step D1, the functional entity in the packet network obtains the address of the access information database directly from the bearer access network information.

The bearer access network information may include the access information database domain name;

In the step D1, the functional entities in the packet network query the network database according to the domain name of the access information database to obtain the address of the access information database.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a network access unit;

In the step D1, the network access unit directly receives the service request message carrying bearer access network information sent by the user terminal using the extended SIP protocol.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a network access unit;

In the step D1, the network access unit directly receives the registration message carrying the bearer access network information sent by the user terminal using the extended SIP protocol, and the network access unit saves the bearer access network information of the user terminal; after the registration is completed, The user terminal sends a service request message to the network access unit, and the network access unit determines the address of the access information database according to the stored bearer access network information after receiving the service request message.

The step D3 may further include: after the network access unit receives the address location information of the user terminal returned by the access information database, adding the geographic location information to the service request message and sending it to the service control unit through the call session control unit; The control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a network access unit;

In the step D1, the network access unit directly receives the registration message carrying the bearer access network information sent by the user terminal using the extended SIP protocol, and the network access unit determines the address of the access information database according to the bearer access network information;

Said step D3 further comprises:

D31. After receiving the address location information of the user terminal returned by the access information database, the network access unit saves the geographical location information of the user, and returns a successful registration response to the user terminal;

D32. The user terminal sends a service request to the network access unit;

D33. The network access unit adds the stored geographic location information of the user terminal into the service request, and sends it to the service control unit through the call session control unit;

D34. The service control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a service control unit;

In the step D1, the message of the user terminal carrying the access network information received by the service control unit is a service request message carrying the network access information forwarded by the network access unit and the call session control unit.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a service control unit;

In the step D1, the message received by the service control unit carrying the information of the user terminal carrying access to the network is a registration message that uses the extended SIP protocol to carry the information of carrying the access network forwarded by the network access unit and the call session control unit;

The service control unit saves the bearer access network information of the user terminal; after the registration is completed, the user terminal sends a service request message through the network access unit and the call session control unit. Bearer access network information determines the address of the access information database.

The step D3 may further include: After receiving the address and location information of the user terminal returned by the access information database, the service control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit , the corresponding location service processing is implemented by the location processing unit.

In the step D1, the functional entity in the packet network can first determine whether the call needs to obtain the geographic location information of the calling user terminal according to the service information contained in the service request message, and then determine whether the geographic location information of the calling user terminal needs to be obtained After receiving the information, the address of the access information database is determined according to the bearer access network information, and step D2 is executed.

The functional entity in the packet network that queries the geographic location information of the user terminal from the access information database may be a service control unit;

In the step D1, the message received by the service control unit carrying the information of the user terminal carrying the access network is a service request message carried by the network access unit and the call session control unit using the extended SIP protocol to carry the information of the access network; The service control unit determines the address of the access information database according to the bearer access network information;

Said step D3 further comprises:

D31. After receiving the address location information of the user terminal returned by the access information database, the service control unit saves the user's geographic location information, and returns a successful registration response to the call session control unit;

D32. The user terminal sends a service request to the service control unit through the network access unit and the call session control unit;

D33. After receiving the service request, the service control unit implements corresponding location service processing according to the stored geographic location information or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing.

In another aspect to achieve the above object, the present invention provides a method for obtaining geographic location information of traditional user terminals accessed by a fixed network through a packet network. The method uses an access information database to pre-save the correspondence between network location information and geographic location information. relationship; the process for the packet network to obtain the geographical location information of the traditional user terminal connected to the fixed network includes the following steps:

A. When the user access gateway used for traditional user terminals to access the packet network accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user access gateway, and communicates to the user The ingress gateway provides bearer control information;

B. The bearer control access unit binds the bearer control information of the user access gateway with the network location information of the user access gateway and sends it to the access information database;

C. The access information database binds the bearer control information and geographic location information of the user access gateway according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the user access gateway bearer control information and the network location information corresponding relationship;

D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user access gateway according to the bearer control information of the user access gateway;

E. The functional entity in the packet network determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway.

Wherein, the bearer control information may at least include: bearer access network information and an IP address allocated for the user terminal or a bearer control layer user identifier;

The step B is: the bearer control access unit binds the IP address of the user access gateway with the network location information of the user access gateway and sends them to the access information database, or links the user identifier of the bearer control layer with the user access The network location information of the ingress gateway is bound and sent to the access information database;

The step C is: the access information database is based on the corresponding relationship between the network location information and the geographic location information and the binding relationship between the IP address of the user access gateway and the network location information or the binding between the bearer control layer user identifier and the network location information relationship, binding the corresponding relationship between the IP address of the user's access gateway and the geographical location information or the corresponding relationship between the bearer control layer user identifier and the geographical location information;

The step D is: the functional entities in the packet network query the access information database to obtain the geographic location information of the user access gateway according to the IP address of the user access gateway or the bearer control layer user identifier.

In the step A, the bearer control access unit may provide bearer control information to the user access gateway by using the extended DHCP protocol.

Said step D may comprise:

D1. The functional entity in the packet network receives the service request message carrying the bearer access network information sent by the user access gateway, and determines the address of the access information database according to the bearer access network information;

D2. The functional entity in the packet network sends a query request including the IP address of the user access gateway or the bearer control layer user identifier to the access information database according to the address of the access information database;

D3. The access information database is based on the IP address of the user access gateway or the bearer control layer user identifier in the received query request, and according to the bound corresponding relationship between the IP address of the user access gateway and the geographic location information or the bearer control Layer user identification and geographic location information correspondence, obtain the user access gateway address location information, and return it to the functional entity in the packet network.

The bearer access network information may include an access information database address;

In the step D1, the functional entity in the packet network obtains the address of the access information database directly from the bearer access network information.

The bearer access network information may include the access information database domain name;

In the step D1, the functional entities in the packet network query the network database according to the domain name of the access information database to obtain the address of the access information database.

The functional entity in the packet network that queries the geographic location information of the user access gateway from the access information database may be a network access unit;

In the step D1, after receiving the service request from the user terminal, the user access gateway uses the extended SIP protocol to send a service request message carrying bearer access network information to the network access unit;

The step E is: after receiving the address location information of the user access gateway returned by the access information database, the network access unit determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and sends the The location information is added to the service request information and sent to the service control unit through the session control unit; the service control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, which is implemented by the location processing unit Corresponding location service processing.

The functional entity in the packet network that queries the geographic location information of the user access gateway from the access information database may be a service control unit;

In the step D1, after the user access gateway receives the service request of the user terminal, it uses the extended SIP protocol to send a service request message carrying bearer access network information to the service control unit through the network access unit;

The step E is: after receiving the address location information of the user access gateway returned by the access information database, the service control unit determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and according to the obtained The corresponding location service processing is realized by the location information of the location information, or the call is routed to the location processing unit, and the location processing unit realizes the corresponding location service processing.

It can be seen from the above-mentioned technical solutions that the method for the packet network of the present invention to obtain the geographic location information of the packet user terminal connected to the fixed network and the method for the packet network to obtain the geographic location information of the traditional user terminal connected to the fixed network adopt the method of connecting The corresponding relationship between network location information and geographic location information is saved in advance in the access information database; when accessing the bearer control network, the bearer control information is obtained, and the bearer control information and network location information are bound and sent to the access information database. The corresponding relationship between geographic location information and network location information and the corresponding relationship between bearer control information and network location information, determine the relationship between bearer control information and geographic location information, so that functional entities in the packet network can access The information database is queried to obtain the geographic location information. Therefore, the method of the present invention clarifies the specific implementation process of relevant network entities in the IP access network and the packet core network, and can be directly applied in practice.

Description of drawings

FIG. 1 is a schematic diagram of a network structure in which a user terminal accesses an IMS through a fixed network to realize an emergency call;

Fig. 2 is the schematic flow diagram of obtaining the geographic location information of the fixed network access user terminal by the packet network in the protocol;

Fig. 3 is the flow chart of the first preferred embodiment of the method for obtaining the geographical position information of grouped user terminals in the present invention;

Fig. 4 is the flow chart of the second preferred embodiment of the method for obtaining the geographical location information of grouped user terminals in the present invention;

Fig. 5 is the flow chart of the third preferred embodiment of the method for obtaining the geographical location information of grouped user terminals in the present invention;

Fig. 6 is the flow chart of the fourth preferred embodiment of the method for obtaining the geographical location information of grouped user terminals in the present invention;

FIG. 7 is a flow chart of a first preferred embodiment of a method for obtaining geographic location information of a traditional user terminal in the present invention;

FIG. 8 is a flow chart of a second preferred embodiment of the method for obtaining geographic location information of a traditional user terminal in the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

The method for the packet network to obtain the geographic location information of the packet user terminal accessed by the fixed network provided by the present invention, and the method for the packet network to obtain the geographic location information of the traditional user terminal accessed by the fixed network can be directly applied to practice. The idea is: use the access information database to pre-store the corresponding relationship between network location information and geographic location information; obtain the bearer control information when accessing the bearer control network, bind the bearer control information and network location information and send them to the access information database, The access information database determines the relationship between the bearer control information and the geographical location information according to the corresponding relationship between the geographic location information and the network location information and the corresponding relationship between the bearer control information and the network location information, so that the functional entities in the packet network can Information, to access information database query to obtain geographic location information.

The method for the packet network to obtain the geographic location information of the packet user terminal accessing the fixed network and the method for the packet network to obtain the geographic location information of the traditional user terminal accessing the fixed network will be described in detail below.

Four preferred embodiments are given below to describe in detail the method for the packet network to obtain the geographic location information of the packet user terminal accessing the fixed network provided by the present invention.

The method for the packet network to obtain the geographical location information of the grouped user terminals connected to the fixed network provided by the present invention is as follows: the access information database is used to pre-save the corresponding relationship between the network location information and the geographical location information; The process of geographical location information of the user terminal includes the following steps:

A. When the user terminal accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user terminal, and provides the bearer control information to the user terminal;

B. The bearer access unit binds the bearer control information of the user terminal with the network location information of the user terminal and sends it to the access information database;

C. The access information database binds the corresponding relationship between the bearer control information of the user terminal and the geographical location information according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the bearer control information of the user terminal and the network location information;

D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user terminal according to the bearer control information of the user terminal.

Wherein, the bearer control access unit may provide bearer control information to the user terminal by using the extended DHCP protocol. The bearer control information at least includes: bearer access network information and an IP address assigned to the user terminal or a bearer control layer user identifier.

Thus in step B, the bearer access unit binds the IP address of the user terminal or the bearer control layer user identifier with the network location information of the user terminal and sends it to the access information database;

In step C, the access information database binds the IP address or bearer of the user terminal according to the correspondence between the network location information and the geographic location information and the IP address of the user terminal or the binding relationship between the bearer control layer user identifier and the network location information. The corresponding relationship between the user ID of the control layer and the geographic location information;

In step D, the functional entities in the packet network query the access information database to obtain the geographical location information of the user terminal according to the IP address of the user terminal or the bearer control layer user identifier.

Referring to FIG. 3 , FIG. 3 is a flowchart of a first preferred embodiment of the method for obtaining geographic location information of group user terminals in the present invention. In this embodiment, the network access unit queries the packet bearer control network to obtain the geographic location information of the user terminal.

Firstly, the access information database pre-saves the corresponding relationship between network location information and geographic location information including access type, user line ID, IPEdge ID and other information. The format of the geographic location information may be a LIF address defined by OMA, or a text description including street and house number information, and the like.

According to the agreement, the packet network can obtain the geographical location information of the user terminal during the call process. Figure 3 is a call flow, which includes the following steps:

Step 301, the user terminal accesses the packet bearer control network, and initiates an IP address request (IP Addr Req) to the bearer control access unit.

Step 302, the bearer control unit assigns an IP address to the user terminal and returns it to the user terminal, and obtains the network location information of the user terminal including information such as access type, user line identifier, and IP Edge identifier.

In this step, the bearer control unit first verifies the bearer access request of the user terminal, and if it passes, then assigns an IP address, the bearer control layer user identification of the user terminal to the user terminal, and allows the user terminal to access the bearer network; otherwise, the user is not allowed to The terminal accesses the bearer network.

When the bearer control unit assigns an IP address to the user terminal, it carries the bearer control network information and the address of the network access unit in the message by extending the DHCP protocol or other methods. By carrying the control network information, the address of the access information database can be obtained, and through the address of the network access unit, the user terminal can select the correct network access unit when registering and initiating a call.

Step 303, the bearer control unit binds the IP address of the user terminal or the bearer control layer user identifier with its network location information, and notifies the access information database of the binding relationship.

Step 304, the access information database binds the IP address of the user terminal or the corresponding relationship between the bearer control layer user identifier and the geographic location information.

In this step, the access information database binds the user according to the corresponding relationship between the saved network location information and geographic location information, and the IP address of the user terminal reported by the bearer control unit or the corresponding relationship between the bearer control layer user identifier and the network location information. The corresponding relationship between the IP address of the terminal and the geographic location information.

Step 305, the user terminal completes access authentication.

Step 306, the user terminal sends a SIP service request (INVITE) message to the network access unit to initiate a call.

In the six embodiments herein, the extended SIP P-Access-Network-Info header field is used to carry the bearer control network information.

The service request message in this step carries the bearer control network information obtained by the user terminal during the bearer access process, and identification information of related location services, such as an emergency call sign.

The user terminal can first initiate a registration process and register with the call session control unit in the home domain, or it can not register and initiate a call directly. For example, it can directly initiate a call in the case of an emergency call. In this embodiment, the user terminal directly initiates a call.

Step 307, the network access unit determines the address of the access information database according to the bearer control network information in the INVITE message.

In this step, the network access unit can judge that the call needs to provide the geographical location information of the calling user according to the relevant location service identification information in the INVITE message or other methods, so first determine the address of the access information database.

Here, the bearer control network information may directly include the address information of the access information database, or include the domain name of the access information database; the network access unit queries the network database according to the domain name of the access information database to obtain the address of the access information database.

In this embodiment, the bearer control network information may also include bearer control layer user identification information of the user terminal.

Step 308, the network access unit sends a query request including the IP address of the user terminal or user identification information of the bearer control layer to the access information database to query the access information of the user terminal.

Step 309, the access information database verifies the query request of the network access unit.

In this embodiment, the access information database may pre-store the IP address of the legal user or the user identification of the bearer control layer, and after receiving the query request, combine the IP address of the user terminal included in the query request or the user identification information of the bearer control layer with the The legitimate user information stored by itself is compared, and if there is the same, then the verification is passed, and step 310 is executed; otherwise, the verification is not passed, and the process ends.

Step 310, the access information database returns the query result including the geographic location information of the user terminal to the network access unit.

The access information database queries the access information of the user terminal according to the IP address of the user terminal, and returns the query result to the network access unit. The access information includes the access type of the user terminal, geographic location information, and the like.

In step 311, the network access unit selects a call session control unit, and routes the call to the call session control unit that handles the session.

Normally, the session is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the session is handled on the CSCU in the visited domain.

In step 312, the network access unit sends a SIP INVITE message including geographic location information to the call session control unit.

In step 313, the call session control unit routes the SIP INVITE message containing geographic location information to the service control unit that handles the service at the corresponding location according to the service characteristics of the session.

Step 314, the service control unit implements corresponding location service processing according to the geographic location information of the user terminal in the INVITE message, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing.

In this embodiment, the service control unit may be a public safety access point (PSAP), and the location processing unit may be an emergency call center (ECC).

In steps 315-317, the service control unit or the location processing unit returns a call response to the user terminal through the call session control unit and the network access unit to complete the call connection.

Referring to FIG. 4 , FIG. 4 is a flow chart of a second preferred embodiment of the method for obtaining geographic location information of grouped user terminals in the present invention. In this embodiment, the network access unit also queries the packet bearer control network to obtain the geographic location information of the user terminal.

Firstly, the access information database pre-stores the corresponding relationship between network location information and geographical location information including: access type, subscriber line identifier, IPEdge identifier and other information. The format of the geographic location information may be a LIF address defined by OMA, or a text description including street and house number information, and the like.

It is mentioned in the embodiment shown in Figure 3 that after the user terminal completes the access authentication, it can first initiate the registration process, and then continue the call process. The network query obtains the geographic location information of the user terminal, which includes the following steps:

Step 401, the user terminal accesses the packet bearer network, and initiates an IP address request (IP Addr Req) to the bearer control access unit.

Step 402, the bearer control unit assigns an IP address to the user terminal, returns the user identifier of the bearer control layer to the user terminal, and obtains the network location information of the user terminal including information such as access type, user line identifier, and IPEdge identifier.

Step 403, the bearer control unit binds the IP address of the user terminal or the bearer control layer user identifier with its network location information, and notifies the access information database of the binding relationship.

Step 404, the access information database binds the IP address of the user terminal or the corresponding relationship between the bearer control layer user identifier and the geographic location information.

Step 405, the user terminal completes access authentication.

Steps 401 to 405 are completely the same as steps 301 to 305 shown in FIG. 3 , and will not be repeated here.

In step 406, the user terminal initiates a register (Register) message carrying the bearer control network information obtained by the user terminal during the bearer access process to the network access unit.

Step 407, the network access unit forwards the Register message to the call session control unit, and the call session control unit completes user registration or forwards it to a corresponding registration server for processing.

Step 408, after the user terminal successfully registers, the call session control unit returns a registration success message to the network access unit.

Step 409, the network access unit determines the address of the access information database according to the bearer control network information contained in the Register message.

Here, the bearer control network information may directly include the address information of the access information database, or include the domain name of the access information database; the network access unit queries the network database according to the domain name of the access information database to obtain the address of the access information database.

Step 410, the network access unit sends a query request including the IP address of the user terminal or user identification information of the bearer control layer to the access information database to query the access information of the user terminal.

Step 411, the access information database verifies the query request of the network access unit.

The verification method in this embodiment may be exactly the same as the verification method in step 309 shown in FIG. 3 .

Step 412, the access information database returns the query result including the geographic location information of the user terminal to the network access unit.

The access information database queries the access information of the user terminal according to the IP address of the user terminal or the bearer control layer user identifier, and returns the query result to the network access unit. The access information includes the access type of the user terminal, geographic location information, and the like.

Step 413, the network access unit saves the geographic location information of the user terminal.

Step 414, the network access unit forwards the registration success message to the user terminal.

Step 415, the user terminal completes the registration.

Step 416, the user terminal initiates a SIP INVITE message to the network access unit.

Step 417, the network access unit selects a call session control unit, and routes the call to the call session control unit that handles the session.

Normally, the session is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the session is handled on the CSCU in the visited domain.

Steps 418-423 are exactly the same as steps 312-317 shown in FIG. 3: the network access unit sends the service request carrying the geographic location information of the user terminal to the service control unit/location processing unit through the call session control unit. After the service control unit/location processing unit performs service processing, it returns a call response to the user terminal to complete the call connection.

In this embodiment, the network access unit inquires the geographic location information of the user terminal during the registration process, and there is no need to inquire again in the subsequent call flow. Of course, in practical applications, the query may not be performed during the user registration process, but may be performed in the subsequent call flow. The process is basically the same as that in Figure 3, and only the ordinary registration process needs to be added.

Referring to FIG. 5 , FIG. 5 is a flow chart of a third preferred embodiment of the method for obtaining geographic location information of group user terminals in the present invention. In this embodiment, the service control unit queries the packet bearer control network to obtain the geographic location information of the user terminal.

First, the access information database pre-saves the correspondence between network location information and geographic location information. Figure 5 is a call flow, which includes the following steps:

Step 501, the user terminal accesses the packet bearer network, and initiates an IP address request (IP Addr Req) to the bearer control access unit.

Step 502, the bearer control unit assigns an IP address to the user terminal, returns the bearer control layer user identifier to the user terminal, and obtains the network location information of the user terminal including information such as access type, user line identifier, and IPEdge identifier.

Step 503, the bearer control unit binds the IP address of the user terminal or the bearer control layer user identifier with its network location information, and notifies the access information database of the binding relationship.

Step 504, the access information database binds the IP address of the user terminal or the corresponding relationship between the bearer control layer user identifier and the geographic location information.

In this step, the access information database binds the user according to the corresponding relationship between the saved network location information and geographic location information, and the IP address of the user terminal reported by the bearer control unit or the corresponding relationship between the bearer control layer user identifier and the network location information. The corresponding relationship between the IP address of the terminal or the user identifier of the bearer control layer and the geographic location information.

Step 505, the user terminal completes access authentication.

Step 506, the user terminal sends a SIP service request (INVITE) message to the network access unit to initiate a call.

Step 507, the network access unit selects a call session control unit, and routes the call to the call session control unit that handles the session.

Normally, the session is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the session is handled on the CSCU in the visited domain.

Step 508, the network access unit sends the SIP INVITE message to the call session control unit.

Step 509, the call session control unit routes the SIP INVITE message to the service control unit that handles the service at the corresponding location according to the service characteristics of the session.

Step 510, the service control unit determines the address of the access information database according to the bearer control network information in the INVITE message.

In this step, the service control unit can judge that the call needs to provide the geographical location information of the calling user according to the relevant location service identification information in the INVITE message or other methods, so first determine the address of the access information database.

Here, the bearer control network information may directly include the address information of the access information database, or include the domain name of the access information database; the network access unit queries the network database according to the domain name of the access information database to obtain the address of the access information database.

In this embodiment, the bearer control network information may also include bearer control layer user identification information of the user terminal.

Step 511, the service control unit sends a query request including the IP address of the user terminal or user identification information of the bearer control layer to the access information database to query the access information of the user terminal.

Step 512, the access information database verifies the query request of the service control unit.

In this embodiment, the access information database may pre-store the IP address of the legal user or the user identification of the bearer control layer, and after receiving the query request, combine the IP address of the user terminal included in the query request or the user identification information of the bearer control layer with the The information of the legal user stored in itself is compared, if there is the same, then the verification is passed, and step 513 is executed; otherwise, the verification is not passed, and the process ends.

Step 513, the access information database returns the query result including the geographic location information of the user terminal to the service control unit.

The access information database queries the access information of the user terminal according to the IP address of the user terminal, and returns the query result to the service control unit. The access information includes the access type of the user terminal, geographic location information, and the like.

Step 514, the service control unit implements corresponding location service processing according to the geographic location information of the user terminal, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing.

In this embodiment, the service control unit may be a public safety access point (PSAP), and the location processing unit may be an emergency call center (ECC).

In steps 515-517, the service control unit or the location processing unit returns a call response to the user terminal through the call session control unit and the network access unit to complete the call connection.

Referring to FIG. 6, FIG. 6 is a flow chart of a fourth preferred embodiment of the method for obtaining geographic location information of group user terminals in the present invention. In this embodiment, the service control unit queries the packet bearer control network to obtain the geographic location information of the user terminal.

First, the access information database pre-saves the correspondence between network location information and geographic location information. This embodiment is basically the same as the embodiment shown in Figure 5, the difference is that after the user terminal completes the access authentication, it first executes the ordinary registration process, and then, in the subsequent call process, the service control unit queries the packet bearer control network The geographic location information of the user terminal is obtained. The process includes the following steps:

Steps 601-605 are exactly the same as steps 501-505 shown in FIG. 5: the user terminal performs access authentication.

Step 606, the user terminal sends a Register message to the network access unit. The Register message carries the bearer control network information obtained by the user terminal during the bearer access process.

Step 607, the network access unit forwards the Register message to the call session control unit, and the call session control unit completes user registration or forwards it to a corresponding registration server for processing.

Step 608, the call session control unit returns a registration success message to the network access unit.

Step 609, the network access unit forwards the registration success message to the user terminal.

Step 610, the call session control unit initiates third-party registration, and sends a Register message to the service control unit/location processing unit, and the message carries the bearer control network message.

Step 611, the service control unit/location processing unit saves the bearer control network information corresponding to the user terminal.

Step 612, the service control unit/location processing unit sends a registration success message to the call session control unit.

Step 613, the user terminal completes the registration.

Step 614, the user terminal initiates a SIP INVITE message to the network access unit; the INVITE message may also carry identification information of related location services, such as an emergency call sign.

Step 615, the network access unit selects a call session control unit, and routes the call to the call session control unit that handles the session.

Normally, the session is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the session is handled on the CSCU in the visited domain.

Step 616, the network access unit sends the SIP INVITE message to the call session control unit.

Step 617, the call session control unit routes the SIP INVITE message to the service control unit that processes the service at the corresponding location according to the service characteristics of the session;

Steps 618-625 are exactly the same as steps 510-517 in FIG. 5 and will not be repeated here.

In practical applications, the service control unit may also query the geographical location information of the user terminal in the access information database after receiving the registration request carrying the bearer access network information during the registration process. 513 is exactly the same, so I won't repeat them here.

Then, two more preferred embodiments are given to describe in detail the method for the packet network to obtain the geographic location information of the traditional user terminal accessing the fixed network provided by the present invention.

The method for the packet network to obtain the geographical location information of the traditional user terminal accessing the fixed network provided by the present invention is: using the access information database to pre-store the corresponding relationship between the network location information and the geographic location information; The process of geographical location information of the user terminal includes the following steps:

A. When the user access gateway used for traditional user terminals to access the packet network accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user access gateway, and communicates to the user The ingress gateway provides bearer control information;

B. The bearer access unit binds the bearer control information of the user access gateway with the network location information of the user access gateway and sends it to the access information database;

C. The access information database binds the bearer control information and geographic location information of the user access gateway according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the user access gateway bearer control information and the network location information corresponding relationship;

D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user access gateway according to the bearer control information of the user access gateway;

E. The functional entity in the packet network determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway.

Wherein, the bearer control access unit may provide bearer control information to the user access gateway by using the extended DHCP protocol. The bearer control information at least includes: bearer access network information and an IP address assigned to the user terminal or a bearer control layer user identifier.

In this way, in the step B, the bearer access unit binds the IP address of the user access gateway or the user identifier of the bearer control layer with the network location information of the user access gateway and sends it to the access information database;

In the step C, the access information database binds the user access information according to the corresponding relationship between the network location information and the geographic location information and the IP address of the user access gateway or the binding relationship between the bearer control layer user identifier and the network location information. The corresponding relationship between the IP address of the gateway or the bearer control layer user identifier and the geographic location information;

In the step D, the functional entities in the packet network query the access information database to obtain the geographical location information of the user access gateway according to the IP address of the user access gateway or the bearer control layer user identifier.

Referring to FIG. 7, FIG. 7 is a flow chart of a first preferred embodiment of a method for obtaining geographic location information of a traditional user terminal in the present invention. In this embodiment, the network access unit queries the packet bearer control network to obtain the geographic location information of the user access gateway accessed by the user terminal, and the service control unit/emergency call center can determine the geographic location of the user terminal based on this. The user access gateway is within the geographical range allowed for access.

Firstly, the access information database pre-stores the corresponding relationship between network location information and geographical location information including: access type, subscriber line identifier, IPEdge identifier and other information. The format of the geographic location information may be a LIF address defined by OMA, or a text description including street and house number information, and the like.

The specific process includes the following steps:

Step 701, the user access gateway accesses the packet bearer network, and initiates an IP address request to the bearer control access unit.

Step 702, the bearer control unit assigns an IP address to the user access gateway, and the user identifier of the bearer control layer is returned to the user access gateway, and obtains information of the user access gateway including access type, user line identifier, IP Edge identifier, etc. Network location information.

The bearer control unit verifies the bearer access request of the user access gateway, and if it passes, assigns an IP address to the user access gateway, and allows the user access gateway to access the bearer network.

When the bearer control unit assigns an IP address to the user access gateway, it carries the bearer control network information and the address of the network access unit in the message by extending the DHCP protocol or other methods. By carrying the control network information, the address of the access information database can be obtained. Through the address of the network access unit, the user access gateway can select the correct network access unit when registering and initiating a call.

Step 703, the bearer control unit binds the IP address of the user's access gateway or the bearer control layer user identifier with its network location information, and notifies the access information database of the binding relationship.

Step 704, the access information database binds the IP address of the user terminal or the corresponding relationship between the bearer control layer user identifier and the geographic location information.

Step 705, the user accesses the gateway to complete the access authentication.

Step 706, the user access gateway initiates a registration message carrying bearer control network information to the network access unit.

Taking the user access gateway to register with the network access unit through the H248 protocol as an example, the user access gateway sends an H248 service change (ServiceChange) message to the network access unit to initiate registration, and the message carries bearer control network information.

Step 707, the network access unit saves the bearer control network information corresponding to the user access gateway.

Bearer control network information can be provided when the user accesses the gateway to register, or when the user accesses the gateway to initiate a call. This implementation process takes the information provided during registration as an example.

Step 708, the user access gateway registers successfully, and the network access unit sends a response to the user access gateway.

Step 709, the user terminal goes off-hook, dials, and initiates an emergency call to the user access gateway.

Step 710, the user access gateway reports the user number to the network access unit through a H248 notification (NOTIFY) message, and initiates a service request.

Step 711, the network access unit determines the address of the access information database according to the bearer control network information corresponding to the user access gateway.

The network access unit can judge that the geographical location information of the calling user needs to be provided for this call by analyzing the called number of the call or other methods, so firstly determine the address of the access information database.

The network access unit obtains the bearer control network information corresponding to the user access gateway according to the information reported when the user access gateway registers or initiates a call. Here, the bearer control network information may directly include the address information of the access information database, or include the domain name of the access information database; the network access unit queries the network database according to the domain name of the access information database to obtain the address of the access information database.

Step 712, the network access unit sends a query request including the IP address of the user access gateway or user identification information of the bearer control layer to the access information database to query the access information of the user terminal.

Step 713, the access information database verifies the query request of the network access unit.

In this embodiment, the access information database can pre-store the IP address of the legal user access gateway or the user identifier of the bearer control layer, and after receiving the query request, the IP address of the user access gateway or the bearer control layer contained in the query request The layer user identification information is compared with the legal user information stored in itself, and if they are the same, the verification is passed, and step 714 is executed; otherwise, the verification is not passed, and the process ends.

Step 714, the access information database returns the query result including the geographic location information of the user terminal to the network access unit.

The access information database queries the access information of the user terminal according to the IP address of the user terminal, and returns the query result to the network access unit. The access information includes the access type of the user terminal, geographic location information, and the like.

Step 715, the network access unit selects the call session control unit, initiates a SIP INVITE message including the geographic location information of the user access gateway, and routes the call to the call session control unit that processes the call;

Normally, the call is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the call is handled on the CSCU in the visited domain.

The network access unit determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and sends a SIP INVITE message to the call session control unit, which carries the geographic location information of the user access gateway; Port information of the user terminal on the user access gateway may also be carried.

Step 716, the call session control unit routes the SIP INVITE message to the service control unit that handles the service of the corresponding location according to the service characteristics of the call.

The service control unit implements corresponding location service processing according to the geographic location information of the user terminal, or routes the call to a location processing unit, such as an emergency call center, and the emergency call center or other location processing units implement corresponding location service processing.

In steps 717-719, the service control unit or the emergency call center sends a service response to the user access gateway by calling the session control unit and the network access unit, and completes the call connection.

In this embodiment, after step 706, the network access unit may query the geographic location information of the user's access gateway in the access information database. In this way, in the subsequent call flow, there is no need to query the user's access information in the access information database again. The geographic location information of the inbound gateway.

Referring to FIG. 8, FIG. 8 is a flow chart of a second preferred embodiment of the method for obtaining geographic location information of a traditional user terminal in the present invention.

In this embodiment, the service control unit queries the packet bearer control network to obtain the geographic location information of the user access gateway accessed by the user terminal, and the service control unit/emergency call center can determine the geographic location of the user terminal based on this. The access gateway is within the geographical range allowed for access.

Firstly, the access information database pre-stores the corresponding relationship between network location information and geographical location information including: access type, subscriber line identifier, IPEdge identifier and other information. The format of the geographic location information may be a LIF address defined by OMA, or a text description including street and house number information, and the like.

The specific process includes the following steps:

Steps 801-808 are exactly the same as steps 701-708 shown in FIG. 5: the user access gateway completes access authentication and registration.

Step 809, the user terminal goes off-hook, dials, and initiates an emergency call to the user access gateway.

In step 810, the user access gateway reports the user number to the network access unit through a H248 notification (NOTIFY) message, and initiates a service request.

Step 811, the network access unit selects the call session control unit, initiates a SIP INVITE message carrying the bearer control network information of the user access gateway, and routes the call to the call session control unit that processes the call;

Normally, the call is handled on the CSCU in the home domain of the UE, but under certain conditions, such as emergency business situations, the call is handled on the CSCU in the visited domain.

The network access unit sends a SIP INVITE message to the call session control unit, and the message not only carries the bearer control network information, but also carries the port information of the user terminal on the user access gateway.

Step 812, the call session control unit routes the SIP INVITE message to the service control unit that handles the service of the corresponding location according to the service characteristics of the call.

Step 813, the service control unit determines the address of the access information database according to the bearer control network information corresponding to the user access gateway.

The service control unit can judge that the geographical location information of the calling user needs to be provided for this call by analyzing the called number of the call or other methods, so firstly determine the address of the access information database.

The service control unit obtains the bearer control network information corresponding to the user access gateway according to the information reported when the user access gateway registers or initiates a call. Here, the bearer control network information may directly include the address information of the access information database, or include the domain name of the access information database; the network access unit queries the network database according to the domain name of the access information database to obtain the address of the access information database.

Step 814, the service control unit sends a query request including the IP address of the user access gateway or user identification information of the bearer control layer to the access information database to query the access information of the user terminal.

Step 815, the access information database verifies the query request of the service control unit.

In this embodiment, the access information database can pre-store the IP address of the legal user access gateway or the user identifier of the bearer control layer, and after receiving the query request, the IP address of the user access gateway or the bearer control layer contained in the query request The layer user identification information is compared with the legal user information stored in itself, if they are the same, the verification is passed, and step 816 is executed; otherwise, the verification is not passed, and the process ends.

Step 816, the access information database returns the query result including the geographic location information of the user's access gateway to the service control unit.

The access information database queries the access information of the user terminal according to the IP address of the user terminal or the user identifier of the bearer control layer, and returns the query result to the service control unit. The access information includes the access type of the user terminal, geographic location information, and the like.

In steps 817-819, the service control unit determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and implements corresponding location service processing according to the geographic location information of the user terminal, or routes the call to the emergency The location processing unit such as the call center implements corresponding location service processing by the emergency call center. Then, the call session control unit and the network access unit send a service response to the user access gateway to complete the call connection.

It can be seen from the above-mentioned embodiments that the method for the packet network of the present invention to obtain the geographic location information of the packet user terminal connected to the fixed network and the method for the packet network to obtain the geographic location information of the traditional user terminal connected to the fixed network clearly define the The specific implementation process of related network entities in the network access and packet core network can be directly applied in practice.

Claims (23)

1. A method for grouping network to obtain the geographical position information of the grouped user terminal of fixed network access, characterized in that: the access information database is used to pre-save the corresponding relationship between network position information and geographical position information; The process of entering the geographic location information of the grouped user terminal includes the following steps: A. When the user terminal accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user terminal, and provides the bearer control information to the user terminal; B. The bearer control access unit binds the bearer control information of the user terminal with the network location information of the user terminal and sends it to the access information database; C. The access information database binds the corresponding relationship between the bearer control information of the user terminal and the geographical location information according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the bearer control information of the user terminal and the network location information; D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user terminal according to the bearer control information of the user terminal. 2. The method according to claim 1, wherein the bearer control information at least includes: bearer access network information and an IP address assigned to the user terminal or a bearer control layer user identifier; The step B is: the bearer control access unit binds the IP address of the user terminal with the network location information of the user terminal and sends it to the access information database, or links the user identification of the bearer control layer with the network location information of the user terminal Bind and send to the access information database; The step C is: accessing the information database according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the IP address of the user terminal and the network location information or the binding relationship between the bearer control layer user identifier and the network location information, Binding the corresponding relationship between the IP address of the user terminal and the geographic location information or the corresponding relationship between the bearer control layer user identifier and the geographic location information; The step D is: the functional entities in the packet network query the access information database to obtain the geographical location information of the user terminal according to the IP address of the user terminal or the bearer control layer user identifier. 3. The method according to claim 1 or 2, wherein in the step A, the bearer control access unit provides bearer control information to the user terminal by using the extended DHCP protocol. 4. The method according to claim 1, wherein said step D comprises: D1. The functional entity in the packet network receives the message carrying the bearer access network information sent by the user terminal, and determines the address of the access information database according to the bearer access network information; D2. The functional entity in the packet network sends a query request including the IP address of the user terminal or the bearer control layer user identifier to the access information database according to the address of the access information database; D3. The access information database is according to the IP address of the user terminal in the received query request or the bearer control layer user identifier, according to the corresponding relationship between the bound IP address of the user terminal and the geographic location information or the bearer control layer user identifier and The corresponding relation of the geographic location information obtains the geographic location information of the user terminal and returns it to the functional entity in the packet network. 5. The method according to claim 4, characterized in that: said bearer access network information includes an access information database address; In the step D1, the functional entity in the packet network obtains the address of the access information database directly from the bearer access network information. 6. The method according to claim 4, characterized in that: the bearer access network information includes the domain name of the access information database; In the step D1, the functional entities in the packet network query the network database according to the domain name of the access information database to obtain the address of the access information database. 7. The method according to claim 4, characterized in that: the functional entity in the packet network for querying the geographic location information of the user terminal from the access information database is a network access unit; In the step D1, the network access unit directly receives the service request message carrying bearer access network information sent by the user terminal using the extended SIP protocol. 8. The method according to claim 4, characterized in that: the functional entity in the packet network for querying the geographic location information of the user terminal from the access information database is a network access unit; In the step D1, the network access unit directly receives the registration message carrying the bearer access network information sent by the user terminal using the extended SIP protocol, and the network access unit saves the bearer access network information of the user terminal; after the registration is completed, The user terminal sends a service request message to the network access unit, and the network access unit determines the address of the access information database according to the stored bearer access network information after receiving the service request message. 9. The method according to claim 7 or 8, wherein the step D3 further comprises: after the network access unit receives the geographic location information of the user terminal returned from the access information database, adding the geographic location information to the The service request message is sent to the service control unit through the call session control unit; the service control unit realizes the corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, and the location processing unit realizes the corresponding location service processing. business processing. 10. The method according to claim 4, wherein the functional entity in the packet network for querying the geographical position information of the user terminal from the access information database is a network access unit; In the step D1, the network access unit directly receives the registration message carrying the bearer access network information sent by the user terminal using the extended SIP protocol, and the network access unit determines the address of the access information database according to the bearer access network information; Said step D3 further comprises: D31. After receiving the geographic location information of the user terminal returned by the access information database, the network access unit saves the geographic location information of the user, and returns a successful registration response to the user terminal; D32. The user terminal sends a service request to the network access unit; D33. The network access unit adds the stored geographic location information of the user terminal into the service request, and sends it to the service control unit through the call session control unit; D34. The service control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing. 11. The method according to claim 4, characterized in that: the functional entity in the packet network for querying the geographic location information of the user terminal from the access information database is a service control unit; In the step D1, the message of the user terminal carrying the access network information received by the service control unit is a service request message carrying the network access information forwarded by the network access unit and the call session control unit. 12. The method according to claim 4, characterized in that: the functional entity in the packet network for querying the geographic location information of the user terminal from the access information database is a service control unit; In the step D1, the message received by the service control unit carrying the information of the user terminal carrying access to the network is a registration message that uses the extended SIP protocol to carry the information of carrying the access network forwarded by the network access unit and the call session control unit; The service control unit saves the bearer access network information of the user terminal; after the registration is completed, the user terminal sends a service request message through the network access unit and the call session control unit, and after receiving the service request message, the service control unit The access network information determines the address of the access information database. 13. The method according to claim 11 or 12, characterized in that the step D3 further comprises: after the service control unit receives the geographic location information of the user terminal returned from the access information database, according to the geographic location information in the service request, The information implements corresponding location service processing, or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing. 14. The method according to claim 7, 8, 11 or 12, characterized in that: in the step D1, the functional entity in the packet network first determines whether the current call needs to obtain the service information according to the service information contained in the service request message The geographic location information of the calling user terminal is determined to be obtained after the geographic location information of the calling user terminal is determined, and then the address of the access information database is determined according to the bearer access network information, and step D2 is performed. 15. The method according to claim 4, characterized in that, the functional entity in the packet network for querying the geographic location information of the user terminal from the access information database is a service control unit; In the step D1, the message received by the service control unit carrying the information of the user terminal carrying the access network is a service request message carried by the network access unit and the call session control unit using the extended SIP protocol to carry the information of the access network; The service control unit determines the address of the access information database according to the bearer access network information; Said step D3 further comprises: D31. After receiving the geographical position information of the user terminal returned by the access information database, the service control unit saves the geographical position information of the user, and returns a successful registration response to the call session control unit; D32. The user terminal sends a service request to the service control unit through the network access unit and the call session control unit; D33. After receiving the service request, the service control unit implements corresponding location service processing according to the stored geographic location information or routes the call to the location processing unit, and the location processing unit implements corresponding location service processing. 16. A method for obtaining geographical location information of traditional user terminals accessed by a fixed network through a packet network, characterized in that: the access information database is used to pre-save the corresponding relationship between network location information and geographic location information; The process of entering the geographic location information of the traditional user terminal includes the following steps: A. When the user access gateway used for traditional user terminals to access the packet network accesses the bearer control network through the bearer control access unit, the bearer control access unit obtains the network location information of the user access gateway, and communicates to the user The ingress gateway provides bearer control information; B. The bearer control access unit binds the bearer control information of the user access gateway with the network location information of the user access gateway and sends it to the access information database; C. The access information database binds the bearer control information and geographic location information of the user access gateway according to the corresponding relationship between the network location information and the geographic location information and the binding relationship between the user access gateway bearer control information and the network location information corresponding relationship; D. The functional entities in the packet network query the access information database to obtain the geographic location information of the user access gateway according to the bearer control information of the user access gateway; E. The functional entity in the packet network determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway. 17. The method according to claim 16, wherein the bearer control information at least includes: bearer access network information and an IP address assigned to the user terminal or a bearer control layer user identifier; The step B is: the bearer control access unit binds the IP address of the user access gateway with the network location information of the user access gateway and sends them to the access information database, or links the user identifier of the bearer control layer with the user access The network location information of the ingress gateway is bound and sent to the access information database; The step C is: the access information database is based on the corresponding relationship between the network location information and the geographic location information and the binding relationship between the IP address of the user access gateway and the network location information or the binding between the bearer control layer user identifier and the network location information relationship, binding the corresponding relationship between the IP address of the user's access gateway and the geographical location information or the corresponding relationship between the bearer control layer user identifier and the geographical location information; The step D is: the functional entities in the packet network query the access information database to obtain the geographic location information of the user access gateway according to the IP address of the user access gateway or the bearer control layer user identifier. 18. The method according to claim 16 or 17, characterized in that: in the step A, the bearer control access unit provides bearer control information to the user access gateway by using the extended DHCP protocol. 19. The method according to claim 16, wherein said step D comprises: D1. The functional entity in the packet network receives the service request message carrying the bearer access network information sent by the user access gateway, and determines the address of the access information database according to the bearer access network information; D2. The functional entity in the packet network sends a query request including the IP address of the user access gateway or the bearer control layer user identifier to the access information database according to the address of the access information database; D3. The access information database is based on the IP address of the user access gateway or the bearer control layer user identifier in the received query request, and according to the bound corresponding relationship between the IP address of the user access gateway and the geographic location information or the bearer control According to the corresponding relationship between the user ID and the geographic location information, the geographic location information of the user's access gateway is obtained and returned to the functional entity in the packet network. 20. The method according to claim 19, characterized in that: said bearer access network information includes an access information database address; In the step D1, the functional entity in the packet network obtains the address of the access information database directly from the bearer access network information. 21. The method according to claim 19, characterized in that: the bearer access network information includes the access information database domain name; In the step D1, the functional entities in the packet network query the network database according to the domain name of the access information database to obtain the address of the access information database. 22. The method according to claim 19, characterized in that: the functional entity in the packet network for querying the geographic location information of the user access gateway from the access information database is a network access unit; In the step D1, after receiving the service request from the user terminal, the user access gateway uses the extended SIP protocol to send a service request message carrying bearer access network information to the network access unit; The step E is: after the network access unit receives the geographical location information of the user access gateway returned by the access information database, it determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and sends the The location information is added to the service request information and sent to the service control unit through the session control unit; the service control unit implements corresponding location service processing according to the geographic location information in the service request, or routes the call to the location processing unit, which is implemented by the location processing unit Corresponding location service processing. 23. The method according to claim 19, characterized in that: the functional entity in the packet network for querying the geographic location information of the user access gateway from the access information database is a service control unit; In the step D1, after the user access gateway receives the service request of the user terminal, it uses the extended SIP protocol to send a service request message carrying bearer access network information to the service control unit through the network access unit; The step E is: after receiving the geographical location information of the user access gateway returned by the access information database, the service control unit determines that the user terminal sending the service request is within the geographical range allowed by the user access gateway, and according to the obtained The corresponding location service processing is realized by the location information of the location information, or the call is routed to the location processing unit, and the location processing unit realizes the corresponding location service processing.

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