CN1992719B - A method for providing access location information - Google Patents

Abstract

The invention discloses a method for providing access location information, comprising the following steps: a home subscriber server (HSS) receives an access control entity/network access configuration function entity/logic function entity (AC/NACF/CLF) through pre-configuration The UE access location information sent by the interface; the HSS provides the UE access location information to an application server (AS). With the present invention, when the UE accesses the IP Multimedia Subsystem (IMS) or the UE access location information changes, the AS can obtain the UE access location information from the HSS by sending query information to the HSS; when the UE access location information changes , the HSS can also send the UE access location information to the AS through subscription notification. Therefore, when the AS cannot perform information interaction with the UE, the AS can directly obtain the access location information of the UE from the HSS without performing information interaction with the UE itself.

Description

A method of providing access location information

technical field

The invention relates to a wireless local area network (WLAN) access technology, in particular to a method for providing access location information. the

Background technique

In emergency call services such as 110, 119, or 120, if the calling party provides access location information in the call information when accessing the network, the called party can, after receiving the call information, Accessing the location information determines the exact location of the calling party. Therefore, it is very necessary to provide the access location information in the emergency call service like 110, 119 or 120, which needs to determine the specific location of the calling party. In WLAN technology, when user equipment (UE) accesses IP Multimedia Subsystem (IMS), it also needs to provide UE access location information to Application Function Entity (AF) in IMS. the

IMS is defined in the R5 version by the Third Generation Partnership Project (3GPP), which is responsible for formulating WCDMA standards. The proposal of IMS provides a packet-based multimedia service and platform for the next-generation IP-based mobile network. Its core feature is that it is based on the Session Initiation Protocol (SIP) and has nothing to do with access. The main functional entities in IMS include AF and Policy Decision Functional Entity (PDF) for Quality of Service (QoS) management. Among them, the AF mainly includes a Call Control Entity (CSCF) that controls functions such as user registration and sessions, a Home Subscriber Server (HSS) that centrally manages user subscription data, and an Application Server (AS) that provides various business logic control functions. the

CSCF is the core of IMS, and it can be divided into the following three types according to logical functions: Proxy CSCF (P-CSCF), Inquiring CSCF (I-CSCF) and Serving CSCF (S-CSCF). Among them, the P-CSCF is the entrance for the user terminal to access the IMS system, and can realize the functions of proxy (Proxy) and user agent (User Agent) in the SIP protocol; the I-CSCF can select the correct S-CSCF for the user by querying the HSS, At the same time, it sends a call request to the S-CSCF; the S-CSCF is used to complete all session processing in the network, including user authentication and authentication, and trigger corresponding services. the

As shown in FIG. 1 , FIG. 1 is a schematic diagram of a UE providing access location information when accessing an IMS in the prior art. Among them, Path (Path) 1 is the path for the UE to provide access location information when accessing the IMS according to the current 3GPP standards, and Path 2 is the path for the UE to provide access location information according to the TISPAN standard of the European Telecommunications Standards Institute. When accessing the IMS, provide a path for accessing location information. In Path 1, the Gm interface is between UE and P-CSCF, the Mw interface is between P-CSCF and (I/S-CSCF), and the ISC interface is between I/S-CSCF and AS; in Path 2 , between P-CSCF and NACF/CLF is the E2 interface, through the Gm interface, Mw interface, ISC interface or E2 interface, information exchange between entities can be realized, and UE access location information transfer between entities can also be realized . In addition, there is a Sh interface between the AS and the HSS, and information exchange between the AS and the HSS can be performed through the Sh interface, and UE access location information can also be transmitted. There is a Cx interface between the I/S-CSCF and the HSS. Currently, information exchange between the I/S-CSCF and the HSS can be performed through the Cx interface, but UE access location information cannot be transmitted. the

For Path 1, the current 3GPP standard extends the SIP protocol, adding the P-Access-Network-Info header field for carrying UE access location information in the SIP message. The P-Access-Network-Info header field contains two pieces of information: one is the access type, which can be identified as IEEE-802.11a or IEEE-802.11b; the other is the access information, and its format is: extension-access-info . The current 3GPP standard stipulates that when the UE accesses the IMS or after the UE access location information changes, the UE can provide its own access location information to the CSCF or AS through the information exchange between itself and the CSCF or AS. When the UE acts as the calling party, the UE fills in its own access location information in the P-Access-Network-Info header field of the SIP message and sends it to the CSCF and AS, and the CSCF and AS receive information from the P-Access-Network-Info header of the SIP message Obtain UE access location information in the domain. When the UE is the called party, the CSCF or the AS can send a SIP message carrying the query request for the UE access location information to the UE, and the UE carries the UE access location information in the P-Access-Network-Info header field of the SIP response message Return to the CSCF or AS, and the CSCF or AS obtains the UE access location information from the P-Access-Network-Info header field of the SIP response message. the

For Path 2, the current TISPAN standard stipulates that when the UE accesses the IMS or after the UE access location information changes, the UE carries its own access location information in the P-Access-Network-Info header field of the SIP message Send it to the access control entity (AC), and the AC obtains the UE access location information from the P-Access-Network-Info header field of the SIP message, and reports the obtained UE access location information to the network access configuration function entity (NACF ); after the NACF assigns an IP address to the UE, the IP address assigned to the UE and the received UE access location information are saved in the Logical Function Entity (CLF); Enter the location information, and carry the UE access location information in the P-Access-Network-Info header field of the SIP message or SIP response message to the I/S-CSCF or AS through information interaction with the I/S-CSCF or AS AS. the

From the process of providing UE access location information by the above two standards, it can be seen that when the UE accesses IMS or after the UE access location information changes, the UE access location information passes through the communication between UE and CSCF or between UE and AS. Information exchange is provided to CSCF or AS, but UE access location information is not provided to HSS. Since the UE access location information is not provided to the HSS, and the UE access location information is not stored in the HSS, the HSS cannot provide the UE access location information to the AS in the prior art, and the AS can only communicate between itself and the UE. Information interaction to obtain UE access location information. If the UE is busy with calls or other services, the AS cannot exchange information with the UE, and the AS cannot obtain the access location information of the UE. the

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for providing access location information, so that the HSS can provide the UE access location information to the AS. the

In order to achieve the above object, the present invention provides a method for providing access location information, the method includes the following steps:

When the UE accesses the IP Multimedia Subsystem IMS, the Home Subscriber Server HSS receives the UE access location information sent by the inquiry call control entity I-CSCF or the serving call control entity S-CSCF through the Cx interface, and the UE access location information Obtained by the access control entity AC or the network access configuration functional entity NACF or logical functional entity CLF and sent to the I-CSCF or S-CSCF through the proxy-call session control functional entity P-CSCF; or, the HSS receives the AC Or the UE access location information sent by NACF or CLF through the quasi-E2 interface, the UE access location information is AC or NACF or CLF query UE access location information and UE IP address according to the UE IP address carried in the request sent by HSS Obtained after the corresponding relationship between addresses;

The HSS provides the UE access location information to the application server AS. the

The HSS receiving the UE access location information sent by the I-CSCF or S-CSCF through the Cx interface includes: the I-CSCF or the S-CSCF adds parameters for processing the access location information through the Cx interface, and sets The UE access location information is sent to the HSS. the

The UE access location information subscription mechanism is further configured on the AC, NACF, or CLF. The request sent by the P-CSCF to the AC, NACF, or CLF further carries UE access location information subscription information. After the UE access location information changes The method further includes:

The AC or NACF or CLF updates the UE access location information, and sends the latest UE access location information in the subscription notification to the P-CSCF according to the P-CSCF’s own subscription information, and the P-CSCF sends the latest UE access location information to the P-CSCF. The location information is sent to the I-CSCF or S-CSCF, and the I-CSCF or S-CSCF sends the latest UE access location information to the HSS through the configured Cx interface. the

In the Mw interface between P-CSCF and I-CSCF or S-CSCF and the Cx interface between I-CSCF or S-CSCF and HSS, add parameters for processing access server address information, AC or NACF or CLF through The quasi-E2 interface further includes before sending the UE access location information to the HSS:

After the P-CSCF obtains the IP address of the UE from the Session Initiation Protocol SIP message sent by the AC, NACF or CLF, it obtains the address of the access location server by querying the local configuration information, and sends the address information of the access server to the I through the configured Mw interface. - CSCF or S-CSCF, I-CSCF or S-CSCF send access server address information to HSS through the configured Cx interface, HSS sends AC or NACF or CLF through the configured quasi-E2 interface according to the received access server address information Send request information. the

The UE access location information subscription mechanism is further configured on the AC, NACF, or CLF, and the request sent by the HSS to the AC, NACF, or CLF further carries UE access location information subscription information. After the UE access location information changes, the method Further includes:

AC or NACF or CLF updates the UE access location information, and carries the latest UE access location information in the subscription notification according to the HSS's own subscription information and sends it to the HSS through the configured quasi-E2 interface. the

The HSS providing the UE access location information to the application server AS includes:

The HSS obtains the UE access location information according to the request information received from the AS, and returns the UE access location information to the AS in the request response information. the

The UE access location information subscription mechanism is further configured on the HSS, and the UE access location information subscription information is further carried in the request sent by the AS to the HSS. After the UE access location information changes, the method further includes:

The HSS updates the UE access location information, and sends the latest UE access location information in the subscription notification to the AS according to the AS's own subscription information. the

A system for providing access to location information, comprising:

When the UE accesses the IP Multimedia Subsystem IMS, the Home Subscriber Server HSS used to receive the UE access location information sent from the inquiring call control entity I-CSCF or the serving call control entity S-CSCF through the Cx interface, the UE The access location information is obtained by the access control entity AC or the network access configuration function entity NACF or the logical function entity CLF and sent to the I-CSCF or S-CSCF through the proxy-call session control function entity P-CSCF; or, receiving The HSS of UE access location information sent by AC or NACF or CLF through the quasi-E2 interface. The UE access location information is that AC, NACF or CLF query UE access location information according to the UE IP address carried in the request sent by HSS Obtained after the corresponding relationship with the UE IP address;

and an AS for receiving UE access location information provided by the HSS. the

The I-CSCF or S-CSCF sends the UE access location information to the HSS through the added parameter for processing access location information in the Cx interface. the

A home subscriber server HSS, including:

When the UE accesses the IP Multimedia Subsystem IMS, a unit for receiving UE access location information sent from the querying call control entity I-CSCF or the serving call control entity S-CSCF through the Cx interface, the UE access location The information is obtained by the access control entity AC or the network access configuration functional entity NACF or the logical functional entity CLF and sent to the I-CSCF or S-CSCF through the proxy-call session control functional entity P-CSCF; or used to receive the AC Or the unit of UE access location information sent by NACF or CLF through the quasi-E2 interface, the UE access location information is AC or NACF or CLF according to the UE IP address carried in the request sent by the HSS to query the UE access location information and Obtained after the corresponding relationship between UE IP addresses;

A unit for providing the UE access location information to an application server AS. the

The HSS further includes:

A unit for receiving updated UE access location information sent by I-CSCF or S-CSCF or AC or NACF or CLF. the

The HSS further includes:

It is used to receive UE access location information subscription information sent by the AS, and send updated UE access location information to the unit of the AS. the

As can be seen from the above solution, the present invention enables AC/NACF/CLF to provide UE access location information to The HSS further enables the HSS to provide the UE access location information to the AS. the

With the present invention, since the parameters for processing location information are added in the Cx interface between the I/S-CSCF and the HSS, when the UE accesses the IMS or after the UE access location information changes, the UE access location information can The configured Cx interface is provided to the HSS by the I/S-CSCF, so the present invention can provide the UE access location information to the HSS. Since the present invention can provide the UE access location information to the HSS, and the HSS can store the UE access location information, when the UE accesses the IMS, the AS can obtain the UE access location information from the HSS by sending query information to the HSS. Therefore, the HSS can provide the UE access location information to the AS. the

Since a quasi-E2 interface is configured between the AC/NACF/CLF and the HSS, when the UE accesses the IMS or after the UE access location information changes, the UE access location information can be sent by the AC/NACF through the configured quasi-E2 interface. NACF/CLF is provided to HSS, so the present invention can provide UE access location information to HSS. Since the present invention can provide the UE access location information to the HSS, and the HSS can store the UE access location information, when the UE accesses the IMS, the AS can obtain the UE access location information from the HSS by sending query information to the HSS. Therefore, the HSS can provide the UE access location information to the AS. the

Since the present invention can further configure the UE access location information subscription mechanism on the HSS, the AS subscribes to the UE access location information on the HSS, so after the UE access location information changes, the HSS can update the UE access location information according to the AS's own subscription information. UE access location information is sent to AS through subscription notification. Therefore, the HSS can provide the UE access location information to the AS. At the same time, by using the above method, the AS can acquire the latest UE access location information without actively sending a UE access location information query request to the HSS. the

Since the HSS can provide the UE access location information to the AS, when the UE is busy with calls or other services and the AS cannot exchange information with the UE, the AS can directly obtain the UE access location information from the HSS without having to communicate with the UE through itself. Perform information exchange to obtain UE access location information. the

Since the present invention can further configure UE access location information subscription mechanism on AC/NACF/CLF, P-CSCF subscribes UE access location information on AC/NACF/CLF, so after UE access location information changes, AC/NACF/CLF can send UE access location information to P-CSCF through subscription notification according to P-CSCF's own subscription information, and P-CSCF does not need to actively send UE access location information query request to AC/NACF/CLF The latest UE access location information can be obtained. the

Since the present invention can further configure UE access location information subscription mechanism on AC/NACF/CLF, HSS subscribes UE access location information on AC/NACF/CLF, so after UE access location information changes, AC/NACF/CLF NACF/CLF can send UE access location information to HSS through subscription notification according to HSS's own subscription information, and HSS can obtain the latest UE access location information without actively sending UE access location information query request to AC/NACF/CLF location information. the

Description of drawings

FIG. 1 is a schematic diagram of the UE providing access location information when accessing the IMS in the prior art;

FIG. 2 is a schematic diagram of a network structure providing access location information according to a first embodiment of the present invention;

Figure 3 is a signaling flow chart for providing access location information according to the first embodiment of the present invention;

FIG. 4 is a schematic diagram of a network structure providing access location information according to a second embodiment of the present invention;

Fig. 5 is a signaling flowchart for providing access location information according to the second embodiment of the present invention. the

Detailed ways

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

The core content of the present invention is: configuring an interface for providing UE access location information to the HSS, when the UE accesses the IMS, the AC/NACF/CLF provides the UE access location information to the HSS through the configured interface, and the HSS can Provide the UE access location information to the AS. the

The interface configured above to provide the UE access location information to the HSS includes the following two implementation methods:

Method 1: Configure the Cx interface between the I/S-CSCF and the HSS, and add parameters for processing access location information in the Cx interface between the I/S-CSCF and the HSS, so that the I/S-CSCF can pass the configured The Cx interface sends UE access location information to the HSS. the

Method 2: Configure a quasi-E2 interface between AC/NACF/CLF and HSS, that is, configure an E2 interface between AC/NACF/CLF and HSS, and add subscription commands and notification commands to the configured E2 interface. In addition, in method 2, the Mw interface between P-CSCF and I/S-CSCF and the Cx interface between I/S-CSCF and HSS need to be configured respectively. The parameters for processing the address information of the access server are respectively added to the Mw interface of the I/S-CSCF and the Cx interface between the I/S-CSCF and the HSS. In this way, after the P-CSCF obtains the IP address of the UE from the SIP message sent by the AC/NACF/CLF, it obtains the address of the access location server by querying the local configuration information, and then can pass the address information of the access server through the configured Mw interface Send to I/S-CSCF, I/S-CSCF sends access server address information to HSS through configured Cx interface, HSS sends to AC/NACF/CLF through configured quasi-E2 interface according to received access server address information Request information; AC/NACF/CLF can provide the UE access location information to the HSS through the configured quasi-E2 interface after receiving the request information. the

As mentioned above, when the UE accesses the IMS, the UE sends an attach request carrying the UE access location information to the AC/NACF/CLF. After receiving the attach request, the AC/NACF/CLF allocates an IP address for the UE, establishes and saves the UE access The corresponding relationship between the location information and the UE IP address, and then the AC/NACF/CLF provides the UE access location information to the HSS. the

In the above-mentioned first method of configuring the interface used to provide the UE access location information to the HSS, the specific process of AC/NACF/CLF providing the UE access location information to the HSS is as follows:

P-CSCF receives UE's registration request, and sends UE access location information query request to AC/NACF/CLF; AC/NACF/CLF queries UE access location information and UE access location information according to UE IP address carried in the request sent by P-CSCF Correspondence between UE IP addresses to obtain UE access location information;

AC/NACF/CLF sends the UE access location information to the P-CSCF, the P-CSCF sends the UE access location information to the I/S-CSCF, and the I/S-CSCF sends the UE access location information through the configured Cx interface Send it to the HSS, so as to provide the UE access location information to the HSS. the

In the above-mentioned first method of configuring the interface for providing UE access location information to the HSS, the present invention further configures a UE access location information subscription mechanism on AC/NACF/CLF, and sends the P-CSCF to AC/NACF The request sent by /CLF further carries UE access location information subscription information. After learning that the UE access location information has changed, the AC/NACF/CLF updates the UE access location information, and sends the latest UE access location information in the subscription notification to the P-CSCF according to the subscription information of the P-CSCF itself. CSCF, P-CSCF send the latest UE access location information to I/S-CSCF, and I/S-CSCF sends the latest UE access location information to HSS through the configured Cx interface, so as to realize UE access location Information provided to HSS. The above request sent by the P-CSCF to the AC/NACF/CLF includes, but is not limited to, a UE access location information query request. the

In the above-mentioned second method of configuring the interface used to provide the UE access location information to the HSS, the specific process of AC/NACF/CLF providing the UE access location information to the HSS is as follows:

According to the AC/NACF/CLF address information, the HSS sends a UE access location information query request carrying the UE IP address to AC/NACF/CLF through the configured quasi-E2 interface, and AC/NACF/CLF receives the UE access location information query request Finally, query the correspondence between the UE access location information and the UE IP address according to the UE IP address carried in the UE access location information query request, and obtain the UE access location information; then, the AC/NACF/CLF connects the UE to the The location information is carried in the UE access location information query request response and returned to the HSS through the configured quasi-E2 interface, so as to provide the UE access location information to the HSS. the

In the second method of configuring the interface for providing UE access location information to the HSS, the present invention further configures a UE access location information subscription mechanism on the AC/NACF/CLF, and the HSS sends the AC/NACF/CLF The sent request further carries UE access location information subscription information. After learning that the UE access location information has changed, the AC/NACF/CLF updates the UE access location information, and carries the latest UE access location information in the subscription notification according to the HSS's own subscription information through the configured quasi-E2 interface Send it to the HSS, so as to provide the UE access location information to the HSS. The above request sent by the HSS to the AC/NACF/CLF includes, but is not limited to, a UE access location information query request. the

In addition, after the AC/NACF/CLF provides the UE access location information to the HSS, the HSS further stores the received UE access location information; after the HSS receives the latest UE access location information, the HSS further stores the stored UE access location information. The access location information is updated to the latest UE access location information. the

The above HSS can provide the UE access location information to the AS in the following two ways:

Mode 1. The AS sends a UE access location information query request to the HSS. After receiving the UE access location information query request, the HSS returns the UE access location information to the AS in the UE access location information query response, thereby realizing The HSS provides the UE access location information to the AS. the

Method 2: Further configure the UE access location information subscription mechanism on the HSS, and further carry the UE access location information subscription information in the request sent by the AS to the HSS. After learning that the UE access location information has changed, the HSS updates the UE access location information, and sends the latest UE access location information in the subscription notification to the AS according to the AS's own subscription information, so that the HSS can connect the UE to the AS. The incoming location information is provided to the AS. The above request sent by the AS to the HSS includes, but is not limited to, a UE access location information query request. the

In order to more clearly illustrate the method for providing access location information provided by the present invention, the technical solution provided by the present invention will be described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. the

As shown in FIG. 2 , FIG. 2 is a schematic diagram of a network structure for providing access location information according to a first embodiment of the present invention. In Figure 2, the Cx interface between the I/S-CSCF and the HSS is the configured Cx interface. Through the configured Cx interface, the I/S-CSCF and the HSS can perform information exchange and UE access Transmission of location information. the

Based on the schematic diagram of the networking structure for providing access location information shown in FIG. 2, FIG. 3 shows a signaling flow chart for providing access location information according to the first embodiment of the present invention. The method includes the following steps:

Step 301: UE sends an attach request to AC/NACF/CLF through an access point (AP), requesting AC/NACF/CLF to allocate an IP address for UE, and the attach request carries at least UE access location information. the

Step 302: AC/NACF/CLF receives the UE's attachment request, assigns an IP address to the UE, establishes and saves the correspondence between the UE's access location information and the UE's IP address, and then carries the IP address assigned to the UE in the attachment Returned to UE in request response. the

Step 303: The UE sends a registration request to the P-CSCF, and the registration request carries at least a source IP address and a destination IP address; wherein, the source IP address is the IP address of the UE, and the destination IP address is the IP address of the P-CSCF. the

Step 304: The P-CSCF receives the registration request, obtains the IP address of the UE from the registration request, and sends a UE connection message carrying the UE IP address to the AC/NACF/CLF through the E2 interface between itself and the AC/NACF/CLF. Enter location information query request. the

Step 305: AC/NACF/CLF receives the UE access location information query request, queries the correspondence between the UE access location information and the UE IP address according to the UE's IP address carried in the request, and obtains the UE access location information, Then return the obtained UE access location information to the P-CSCF in the UE access location information inquiry request response. the

Steps 306-307: The P-CSCF carries the obtained UE access location information in the P-Access-Network-Info header field of the SIP message and sends it to the I-CSCF/S-CSCF, and the I-CSCF/S-CSCF sends the UE access location information to the I-CSCF/S-CSCF. The access location information is carried in the parameter processing access location information added on the Cx interface and sent to the HSS, and the HSS saves the received UE access location information. the

Steps 308-310: The HSS returns a SIP response message to the I-CSCF/S-CSCF, the I-CSCF/S-CSCF returns a SIP response message to the P-CSCF, and the P-CSCF returns a registration request response to the UE. the

Step 311: the AS sends a UE access location information query request to the HSS through the Sh interface. the

Step 312: The HSS obtains the UE access location information according to the request information received from the AS, and returns the UE access location information to the AS in the request response information, so that the HSS provides the UE access location information to the AS. the

As shown in FIG. 4, FIG. 4 is a schematic diagram of a network structure for providing access location information according to a second embodiment of the present invention. In Figure 4, the Cx interface between the I/S-CSCF and the HSS is the configured Cx interface. The configured Cx interface between the I/S-CSCF and the HSS can not only exchange information, but also access location Transfer of server address information. The Mw interface between the P-CSCF and the I/S-CSCF is the configured Mw interface, and the P-CSCF sends the access location server address to the I/S-CSCF through the configured Mw interface, and the I/S-CSCF configures Then the Cx interface will access the location server address HSS. In addition, the present invention also configures a quasi-E2 interface between AC/NACF/CLF and HSS, and the HSS can send UE access location information query request to AC/NACF/CLF through the configured quasi-E2 interface according to the address of the access location server. AC/NACF/CLF can provide UE access location information to HSS through the configured quasi-E2 interface. the

Based on the schematic diagram of the networking structure for providing access location information shown in FIG. 4, FIG. 5 shows a signaling flow chart for providing access location information according to a second embodiment of the present invention. The method includes the following steps:

Step 501: The UE sends an attach request to the AC/NACF/CLF through the AP, requesting the AC/NACF/CLF to allocate an IP address for the UE, and the attach request carries at least UE access location information. the

Step 502: AC/NACF/CLF receives the UE's attach request, assigns an IP address to the UE, and saves the correspondence between the UE's access location information and the IP address, and then carries the IP address assigned to the UE in the attach request response returned to the UE. the

Step 503: The UE sends a registration request to the P-CSCF, and the registration request carries at least a source IP address and a destination IP address; wherein, the source IP address is the IP address of the UE, and the destination IP address is the IP address of the P-CSCF. The access location server address is the domain name or IP address of the access location server. the

Steps 504-505: P-CSCF receives the registration request, queries the local configuration information according to the UE IP address carried in the registration request, obtains the address information of the access location server, and then sends the UE IP address and the access location server through the configured Mw interface The server address information is sent to the I-CSCF/S-CSCF, and the I-CSCF/S-CSCF sends the UE IP address and access location server address to the HSS through the configured Cx interface, and the HSS saves the received UE IP address and access location server address. the

Steps 506-508: The HSS returns a SIP response message to the I-CSCF/S-CSCF, the I-CSCF/S-CSCF returns a SIP response message to the P-CSCF, and the P-CSCF returns a registration request response to the UE. the

Step 509: The HSS sends the UE access location information query request carrying the UE IP address to the AC/NACF/CLF through the configured quasi-E2 interface according to the access location server address. the

Step 510: AC/NACF/CLF receives the UE access location information query request, queries the correspondence between the UE access location information and the UE IP address according to the UE IP address carried in the request, obtains the UE access location information, and then The obtained UE access location information is carried in the UE access location information query request response and returned to the HSS through the configured quasi-E2 interface. the

Step 511: the AS sends a UE access location information query request to the HSS through the Sh interface. the

Step 512: The HSS obtains the UE access location information according to the request information received from the AS, and returns the UE access location information to the AS in the request response information, so that the HSS provides the UE access location information to the AS. the

In step 304 of the first embodiment of the present invention, the P-CSCF sends the UE access location information inquiry request to the AC/NACF/CLF only carrying the IP address of the UE. In practical applications, the UE access location information subscription information may be further carried in the UE access location information query request sent by the P-CSCF to the AC/NACF/CLF. In this case, the UE access location information subscription mechanism needs to be configured on the AC/NACF/CLF. After the AC/NACF/CLF learns that the UE access location information has changed, the AC/NACF/CLF updates the UE access location information, and actively notifies the latest UE access location information through subscription notification according to the P-CSCF’s own subscription information. Send to P-CSCF; P-CSCF provides the latest UE access location information to I/S-CSCF through the Mw interface between itself and I/S-CSCF, and I/S-CSCF sends HSS through the configured Cx interface Send the latest UE access location information. After the HSS receives the latest UE access location information, the HSS updates the saved UE access location information to the latest UE access location information. Such a technical solution is consistent with the technical solution provided by the present invention, and should be included in the protection scope of the present invention. the

In step 509 of the second embodiment of the present invention, the HSS sends the UE access location information query request to the AC/NACF/CLF only carrying the UE's IP address. In practical applications, the UE access location information subscription information can be further carried in the UE access location information query request sent by the HSS to the AC/NACF/CLF. In this case, the UE access location information subscription mechanism needs to be configured on the AC/NACF/CLF. After the AC/NACF/CLF learns that the UE access location information has changed, the AC/NACF/CLF updates the UE access location information, and actively sends the latest UE access location information to HSS. After the HSS receives the latest UE access location information, the HSS updates the saved UE access location information to the latest UE access location information. Such a technical solution is consistent with the technical solution provided by the present invention, and should be included in the protection scope of the present invention. the

In step 311 of the first embodiment of the present invention and step 511 of the second embodiment, the AS sends the UE access location information query request to the HSS, which only carries the IP address of the UE. In practical applications, UE access location information subscription information may be further carried in the UE access location information query request sent by the AS to the HSS. In this case, the UE access location information subscription mechanism needs to be configured on the HSS. After the HSS learns that the UE access location information has changed, the HSS updates the UE access location information, and actively sends the latest UE access location information to the AS through a subscription notification according to the subscription information of the AS in itself, so that the HSS can connect the UE to the AS. The incoming location information is provided to the AS. Such a technical solution is consistent with the technical solution provided by the present invention, and should be included in the protection scope of the present invention. the

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. the

Claims (12)

1. the method that accessing position information is provided is characterized in that, this method may further comprise the steps:

When UE inserts IP Multimedia System IMS, home subscriber server HSS receives the UE accessing position information that query call controlled entity I-CSCF or service call controlled entity S-CSCF send by Cx interface, and described UE accessing position information is access control entity AC or network access configuration function entity NACF or logical functional entity CLF obtains and send to I-CSCF or S-CSCF by Proxy-Call Session Control Function entity P-CSCF; Perhaps, described HSS receives the UE accessing position information that AC or NACF or CLF send by accurate E2 interface, obtains behind UE IP address lookup UE accessing position information that carries in the request that to be AC or NACF or CLF send according to HSS of described UE accessing position information and the corresponding relation between the UE IP address;

Described HSS offers application server AS with the UE accessing position information.

2. method according to claim 1, it is characterized in that, described HSS receives I-CSCF or S-CSCF comprises by the UE accessing position information that Cx interface sends: described I-CSCF or S-CSCF send to HSS by the parameter of the processing accessing position information that increases in the described Cx interface with described UE accessing position information.

3. method according to claim 2, it is characterized in that, further configuration UE accessing position information subscribing mechanism on AC or NACF or CLF, P-CSCF further carries UE accessing position information subscription information in the request of AC or NACF or CLF transmission, this method further comprised after described UE accessing position information changed:

AC or NACF or CLF upgrade the UE accessing position information, and up-to-date UE accessing position information is carried in self subscription information according to P-CSCF and sends to P-CSCF in the subscribing notification, P-CSCF sends to I-CSCF or S-CSCF with up-to-date UE accessing position information, and I-CSCF or S-CSCF send to HSS by the Cx interface of configuration with up-to-date UE accessing position information.

4. method according to claim 1, it is characterized in that, increase the parameter of handling the access server address information in the Cx interface between Mw between P-CSCF and I-CSCF or S-CSCF and I-CSCF or S-CSCF and the HSS respectively, AC or NACF or CLF further comprise before by accurate E2 interface the UE accessing position information being sent to HSS:

P-CSCF obtains the IP address of UE from the Session initiation Protocol sip message of AC or NACF or CLF transmission after, obtain the on-position server address by inquiring about local configuration information, Mw by configuration sends to I-CSCF or S-CSCF with the access server address information, I-CSCF or S-CSCF send to HSS by the Cx interface of configuration with the access server address information, and HSS passes through the accurate E2 interface of configuration to AC or NACF or CLF transmission solicited message according to the access server address information that receives.

5. method according to claim 4, it is characterized in that, further configuration UE accessing position information subscribing mechanism on AC or NACF or CLF, HSS further carries UE accessing position information subscription information in the request of AC or NACF or CLF transmission, this method further comprised after described UE accessing position information changed:

AC or NACF or CLF upgrade the UE accessing position information, and will up-to-date UE accessing position information be carried in the subscribing notification in the subscription information of self according to HSS and send to HSS by the accurate E2 interface that disposes.

6. method according to claim 1 is characterized in that, described HSS offers application server AS with the UE accessing position information and comprises:

HSS obtains the UE accessing position information according to the solicited message that is received from AS, and the UE accessing position information is carried in the request response message returns to AS.

7. method according to claim 6, it is characterized in that, further configuration UE accessing position information subscribing mechanism further carries UE accessing position information subscription information at AS in the request that HSS sends on HSS, and this method further comprised after described UE accessing position information changed:

HSS upgrades the UE accessing position information, and up-to-date UE accessing position information is carried in self subscription information according to AS and sends to AS in the subscribing notification.

8. the system that accessing position information is provided is characterized in that, this system comprises:

When UE inserts IP Multimedia System IMS, be used to receive the home subscriber server HSS of the UE accessing position information that sends by Cx interface from query call controlled entity I-CSCF or service call controlled entity S-CSCF, described UE accessing position information is access control entity AC or network access configuration function entity NACF or logical functional entity CLF obtains and send to I-CSCF or S-CSCF by Proxy-Call Session Control Function entity P-CSCF; Perhaps, receive the HSS of the UE accessing position information that AC or NACF or CLF send by accurate E2 interface, obtain behind UE IP address lookup UE accessing position information that carries in the request that to be AC or NACF or CLF send according to HSS of described UE accessing position information and the corresponding relation between the UE IP address;

And the AS that is used to receive the UE accessing position information that described HSS provides.

9. system according to claim 8 is characterized in that, described I-CSCF or S-CSCF send to HSS by the parameter of the processing accessing position information that increases in the described Cx interface with described UE accessing position information.

10. a home subscriber server HSS is characterized in that, described HSS comprises:

When UE inserts IP Multimedia System IMS, be used to receive the unit of the UE accessing position information that sends by Cx interface from query call controlled entity I-CSCF or service call controlled entity S-CSCF, described UE accessing position information is access control entity AC or network access configuration function entity NACF or logical functional entity CLF obtains and send to I-CSCF or S-CSCF by Proxy-Call Session Control Function entity P-CSCF; Perhaps, be used to receive the unit of the UE accessing position information that AC or NACF or CLF send by accurate E2 interface, obtain behind UE IP address lookup UE accessing position information that carries in the request that to be AC or NACF or CLF send according to HSS of described UE accessing position information and the corresponding relation between the UE IP address;

Be used for described UE accessing position information is offered the unit of application server AS.

11. HSS according to claim 10 is characterized in that, further comprises among the described HSS:

Be used to receive the unit of the UE accessing position information of the renewal that I-CSCF or S-CSCF or AC or NACF or CLF send.

12. HSS according to claim 10 is characterized in that, further comprises among the described HSS:

Be used to receive the UE accessing position information subscription information that AS sends, the UE accessing position information that upgrades sent to the unit of described AS.

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