CN101489266B - IMS user stage controlling method and system based on signature data - Google Patents

Abstract

The embodiment of the present invention discloses an IMS user-level control method and system based on subscription data, wherein the method includes a step: when receiving a user's registration request or session request, the user-level service control device acquires user information corresponding to the user ID , and according to the obtained user information, perform user-level QoS control, or registered user number control, or concurrent session number control respectively, and the user information is stored in the user database UDB of the system when the user opens an account. The number of registered users or the number of concurrent sessions can be controlled by adopting the embodiment of the present invention, and when the NASS system is not deployed in the IMS network, accurate service control to the user can be performed according to the user's account opening and signing data information.

Description

IMS user-level control method and system based on subscription data

technical field

The invention relates to the technical field of network communication, in particular to an IMS user-level control method and system based on subscription data.

Background technique

At present, the IMS (IP Multimedia Subsystem) network mainly provides users with reliable QoS quality services through the proxy call session control function server P-CSCF, including bandwidth/throughput, delay, jitter, packet loss rate, availability, etc. In the IMS network, the QoS signaling control and resource allocation mechanism are independent of the session control protocol. It mainly completes functions such as authorization/update/revocation of media resources, confirmation of bearer reservation, gate control opening/closing, indication of bearer release/failure, etc.

When accessing the fixed network, the application layer AF, which includes the proxy call session control function server P-CSCF (Proxy-CSCF) or the access network resource admission control function server A-RACF (Access-Resource Admission Control Function), needs to be accessed from the NASS The (Network Attachment Subsystem) subsystem obtains the user's location information, QoS Profile data, the maximum number of contact addresses and the maximum number of concurrent sessions, and then can perform QoS control based on this, as well as control the number of registered users and the number of concurrent sessions.

For example, in the prior art, when the NASS subsystem is not deployed in the IMS network, the network QoS control process is realized through the control of the proxy call session control function server P-CSCF as shown in Figure 1:

Step 1-2 represents that after receiving the user's session request, the proxy call session control function server P-CSCF obtains the user name, user IP and media information, etc. from the SDP offer of the session request, and then forwards the session request to other devices in the network;

Steps 3-4 represent that when the P-CSCF receives the session request response SDPanswer returned by other network devices, the P-CSCF obtains the flow ID, UE IP, and flow bandwidth information from the SDP answer. Then P-CSCF sends AAR authorization information to SPDF;

Steps 5, 6, and 7 represent that the service policy decision-making function server SPDF sends authorized QOS information to the border gateway function server BGF (Border Gate Function). BGF performs QoS control according to SPDF's authorized QOS information and local idle resources, and sends Go RPT response to SPDF. After receiving this response, SPDF will send AAA response information to P-CSCF. In the process of QoS control, BGF can only determine whether resources can be reserved for users according to the idleness of resources, and cannot perform QoS control according to user rights or subscription information.

In the above prior art, when the NASS system is not deployed in the IMS network, the AF cannot obtain the user's location information and QoS Profile data, so the QoS control policy can only be configured based on a certain BGF, that is, for accessing the IMS network from the same BGF Users in can only use the same QoS control policy. As a result, the QoS resources that can be used by ordinary users accessing the same BGF as home users or enterprise network users may be preempted by home users or enterprise network users, and their normal calls or other services are seriously affected.

In addition, when the NASS system is not deployed in the IMS network, the AF cannot obtain the maximum number of contact addresses and the maximum number of concurrent sessions of the user, and the control of the number of registered users and the number of concurrent sessions in the network can only be accurate to the granularity of the network element. At the same time, enterprise network users or home users registered in this network element cannot control the number of registered contact addresses and the number of concurrent sessions. If the number of contact addresses and concurrent sessions registered by enterprise network users or home users is very large, the normal registration and sessions of ordinary users will be affected because the registration and session behavior of home users cannot be controlled.

To sum up, when the NASS subsystem is not deployed in the IMS network, the application layer AF of the communication system cannot obtain the relevant user information corresponding to the user ID, and perform precise service control at the relevant user level.

Contents of the invention

The embodiment of the present invention provides an IMS user-level control method and system based on subscription data. When the NASS subsystem is not deployed in the IMS network, the user's account opening information can be obtained through the user-level service control device, and QoS accurate to the user can be performed. Control, or control the number of registered users, or control the number of concurrent sessions.

An IMS user-level control method based on subscription data provided by an embodiment of the present invention includes:

In an IMS network where the NASS subsystem is not deployed, when a user's registration request or session request is received, the user-level service control device obtains the user information corresponding to the user ID, and performs user-level QoS control, or control of the number of registered users, or control of the number of concurrent sessions. The user information includes user location information, QoS Profile data, the maximum number of contact addresses, and the maximum number of concurrent sessions. The user information is stored in the account when the user opens an account. In the system's user database UDB.

Further, the user information includes user location information and QoS Profile data, then the user-level service control device performs user-level QoS control; or,

If the user information includes the maximum number of contact addresses, the user-level service control device controls the number of registered users; or,

The user information includes the maximum number of concurrent sessions, and the user-level service control device controls the number of concurrent sessions.

Still further, the content of the user location information and the QoS Profile data provided by the user location information and the QoS Profile data are respectively the same as the NASS subsystem; or the user location information and the QoSProfile data are respectively the e2 interface and the Gq' interface of the IMS network Part or all of the information provided.

Furthermore, the user-level service control module is a SIP proxy server Proxy or an application server AS; the SIP proxy server Proxy includes a proxy call session control function server P-CSCF, a service call session control function server S-CSCF, and an inquiry call Session Control Function Server I-CSCF.

An embodiment of the present invention also provides an IMS user-level control system based on subscription data, including:

The user database is used to store user information corresponding to the user ID;

The user-level service control device is configured to obtain user information corresponding to the user identifier from the user database when receiving a user registration request or session request in an IMS network without a NASS subsystem, and according to the obtained Described user information, carry out the QoS control of user level respectively, or registered user number control, or send session number control; This user information includes user location information, QoS Profile data, maximum number of contact addresses, maximum number of concurrent sessions.

By adopting the embodiment of the present invention, when the NASS subsystem is not deployed in the IMS network, according to the acquired account opening information of the user, it can be controlled by the SIP proxy server Proxy or the application server AS to perform accurate service control to the user. For example, use different QoS control policies for users accessing the IMS network from the same BGF to ensure the reasonable allocation of network resources. Or, for multiple enterprise network users or home users registered in the IMS network at the same time, the number of registered users or concurrent sessions of the communication network can be controlled to ensure that the normal registration and sessions of multiple users will not be affected by interference.

Description of drawings

FIG. 1 is a flow chart of QoS control when the NASS subsystem is not deployed in the IMS network in the prior art;

Fig. 2 is a flow chart of an IMS user-level control method based on subscription data provided by an embodiment of the present invention;

Fig. 3 is a flow chart of obtaining user information through P-CSCF control in the first method embodiment provided by the present invention;

FIG. 4 is a flow chart of completing the QoS control strategy through P-CSCF control in Embodiment 1 of the method provided by the present invention;

Fig. 5 is a flow chart of obtaining user information through S-CSCF control and completing a QoS control strategy in the second embodiment of the method provided by the present invention;

FIG. 6 is a flow chart of obtaining user information through an AS and completing a QoS control strategy in the third embodiment of the method provided by the present invention;

Fig. 7 is the processing flowchart of obtaining user information and completing the control of the number of registered users through the SIP proxy server Proxy in the fourth embodiment of the method provided by the present invention;

Fig. 8 is a processing flow chart of obtaining user information through a SIP proxy server Proxy and completing the control of the number of concurrent sessions in the fifth embodiment of the method provided by the present invention;

Fig. 9 is a processing flowchart of obtaining user information through an AS and completing the control of the number of concurrent sessions in the sixth embodiment of the method provided by the present invention;

Fig. 10 is a schematic structural diagram of an IMS user-level control system based on subscription data provided by the present invention.

Detailed ways

In order to make the present invention easier to understand, the present invention will be further described below in conjunction with the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention.

As shown in Figure 2, the embodiment of the present invention provides an IMS user-level control method based on subscription data, including steps:

201. Obtain user information corresponding to the user identifier through the user-level service control device, and the user information is stored in the user database UDB of the system in advance when the user opens an account.

When a user opens an account in the user database UDB, the user information corresponding to the user ID will be added to the user account opening data, including contract data such as user location information, QoS Profile data, the maximum number of contact addresses, and the maximum number of concurrent sessions.

Wherein the user-level service control device performs user-level QoS control according to the obtained user location information and QoS Profile data; or

The user-level service control device controls the number of registered users according to the obtained maximum number of contact addresses; or

The user-level service control device controls the number of concurrent sessions according to the acquired maximum number of concurrent sessions.

The user-level service control device is a SIP proxy server Proxy or an application server AS; the SIP proxy server Proxy includes a proxy call session control function server P-CSCF, a service call session control function server S-CSCF, and an inquiry call session control function Server I-CSCF.

The user location information and the QoS Profile data are identical with the contents of the user location information and the QoS Profile data provided by the NASS subsystem respectively; or the user location information and the QoS Profile data are respectively provided by the e2 interface and the Gq' interface of the IMS network Part or all of the information can be flexibly configured according to QoS control requirements in actual operation.

202. The user-level service control device performs user-level QoS control, or number of registered users, or number of concurrent sessions control, respectively, according to the acquired user information.

Specifically, as the first implementation of the above method, when a user's registration request or session request is received, the P-CSCF in the SIP proxy server Proxy controls the acquisition and user identification information, such as the user identification information used for user authentication. IMPI (Priivate user identities) identification information, corresponding user location information and QoS Profile data, perform user-level QoS control. Among them, firstly, the P-CSCF controls and obtains the relevant user location information and the processing flow of QoS Profile data as shown in Figure 3:

301. The user sends a registration request to the proxy call session control function server P-CSCF;

302. The P-CSCF sends the user registration request to the Inquiry Call Session Control Function server I-CSCF;

303. The I-CSCF sends the user registration request to the S-CSCF to complete user registration;

304. The S-CSCF sends SAR information to the user database UDB, requesting to obtain relevant user location information and QoS Profile data;

305. The UDB returns to the S-CSCF through SAA information including relevant user location information and QoS Profile data;

306. The S-CSCF returns the response information carrying the relevant user location information and QoS Profile data to the I-CSCF;

307. The I-CSCF returns the response information carrying the relevant user location information and QoS Profile data to the P-CSCF;

308. The P-CSCF returns the response information to the user.

Then, the process of P-CSCF performing user-level QoS control based on obtaining relevant user location information and QoS Profile data is shown in Figure 4.

401. When the P-CSCF receives a session request from a user, generate AAR information including user location information and QoS Profile data;

402. The P-CSCF sends the AAR information carrying user location information and QoS Profile data to the service policy decision function server SPDF;

403. The SPDF sends the AAR information to the access network resource admission control function server A-RACF;

404. The A-RACF determines a QoS control policy and returns it to the SPDF through AAA information;

405. The SPDF issues the QoS control policy to a network device with a Qos control function, that is, a border gateway function server BGF, and performs network QoS control by exchanging information with the BGF;

406. The BGF feeds back control response information to the SPDF.

As a second implementation of the above method, when a user's registration request or session request is received, the S-CSCF controls the acquisition of user identification information from the user database UDB, such as the user's IMPI identification information, the corresponding user location information and QoS Profile data, the steps of performing user-level QoS control are as shown in Figure 5:

501. The user sends a registration request to the Serving Call Session Control Function server S-CSCF;

502. The S-CSCF sends SAR information to the user database UDB to query relevant user location information and QoS Profile data;

503. The user database UDB returns SAA information carrying relevant user location information and QoS Profile data to the S-CSCF;

504. The S-CSCF sends user registration response information 200 to the user;

505. When the S-CSCF receives and processes the user's session request, it judges whether the media type or codec information in the user's session request is signed according to the acquired QoS Profile data;

506. If the S-CSCF determines that there is no contract, reject the current session in the response information 300 returned to the user, or modify the media type or codec information in the user session request.

It should be noted that the authentication process and the processing procedures of the P-CSCF and I-CSCF are omitted in the above steps 501-504.

As the third implementation of the above method, when the user's registration request or session request is received, the application server AS controls to obtain the user identification information from the user database UDB, such as the IMPU (Public user identities) identification information, corresponding user location information and QoS Profile data, the steps of performing user-level QoS control are as shown in Figure 6:

601. The S-CSCF receives and processes a user session request;

602. The S-CSCF sends the SAR information to the user database UDB to query relevant user location information and QoS Profile data;

603. The user database UDB returns SAA information carrying relevant user location information and QoS Profile data to the S-CSCF;

604. When the S-CSCF receives the user session request, it forwards the session request to trigger the application server AS;

605. The application server AS sends UDR information to access the user database UDB, and queries user subscription information including QoS Profile data;

606. The user database UDB returns UDA information carrying relevant user location information and QoS Profile data to the application server AS;

607. The application server AS determines whether the media type or codec information in the user session request is subscribed according to the QoS Profile data, and if not, rejects the session in the response returned to the S-CSCF, Or modify the media type or codec information in the user session request;

608. The S-CSCF forwards the response to the user.

When receiving the user's registration request or session request, the SIP proxy server Proxy controls to obtain and user identification information from the user database UDB, such as the IMPU (Public user identities) identification information used for SIP signaling routing, corresponding to all According to the maximum number of contact addresses, the processing flow for controlling the number of registered users is shown in Figure 7:

701. The user sends a registration request to the SIP proxy server Proxy;

702. When the SIP proxy server Proxy receives the user registration request, it sends SAR information to the user database UDB to query the user identification information, such as the maximum number of contact addresses corresponding to the IMPU;

703. The user database UDB returns the SAA information carrying the maximum number of contact addresses and the maximum number of concurrent sessions to the SIP proxy server Proxy, and the SIP proxy server Proxy determines the number of contact addresses of registered users corresponding to the locally recorded IMPU Whether it is greater than or equal to the maximum number of contact addresses for which the user opened an account, if yes, reject this registration; otherwise, proceed with this registration;

704. The SIP proxy server Proxy notifies the user of the judgment processing result.

When receiving the user's registration request or session request, the SIP proxy server Proxy controls the acquisition of the maximum number of concurrent sessions corresponding to the user identification information from the user database UDB, and the step of controlling the number of concurrent sessions further includes:

801. The user sends a session request to the SIP proxy server Proxy;

802. When the SIP proxy server Proxy receives a user session request, it sends SAR information to the user database UDB to query user identification information, such as the maximum number of concurrent sessions corresponding to the IMPU identification information;

803 The user database UDB returns the SAA information carrying the maximum number of concurrent sessions to the SIP proxy server Proxy, and determines whether the number of concurrent sessions recorded locally and corresponding to the user identification information is greater than or equal to the maximum number of concurrent sessions that the user opened an account for number, if yes, reject the session request; otherwise, proceed with the session;

804. The SIP proxy server Proxy notifies the user of the judgment processing result.

When receiving the user's registration request or session request, the application server AS controls to obtain the user identification information from the user database UDB, such as the maximum number of concurrent sessions corresponding to the user's IMPU identification information, and to control the number of concurrent sessions The processing flow is shown in Figure 9:

901. The user forwards the session request to the application server AS through the SIP proxy server Proxy;

902. When the application server AS receives the user session request, query the maximum number of concurrent sessions corresponding to the user identification information by sending UDR information to the user database UDB;

903. The user database UDB returns the UDA information carrying the maximum number of concurrent sessions to the application server AS, and the application server AS determines whether the locally recorded number of concurrent sessions corresponding to the IMPU is greater than or equal to the maximum number of user accounts opened. The number of concurrent sessions, if yes, reject this session request; otherwise, proceed with this session;

904. The application server AS notifies the user of the judgment processing result.

It should be noted that when the NASS subsystem is deployed in the IMS network, the methods described in all the above-mentioned embodiments of the present invention can also be used to obtain the user information corresponding to the user identification information, perform QoS control accurate to the user, or register the user Number control, or concurrent session number control process.

The embodiment of the present invention also provides an IMS user-level control system based on subscription data, as shown in FIG. 10 , the system includes:

User database 10, for storing user information corresponding to the user identification;

The user-level service control device 20 is configured to acquire user information corresponding to the user identifier from the user database when receiving a user registration request or session request, and perform user-level QoS control according to the acquired user information , or registered user number control, or session number control.

The user-level service control module is a SIP proxy server Proxy or an application server AS; the SIP proxy server Proxy includes a proxy call session control function server P-CSCF, a service call session control function server S-CSCF, and queries the call session control function Server I-CSCF.

It should be noted that, according to the needs of the user QoS control process, or the number of registered users, or the control process of the number of concurrent sessions, the system can flexibly configure other hardware units or servers in actual operation. For example, in the process of user QoS control, it can Configure the border gateway function server BGF and the access network resource admission control function server A-RACF.

Using the above-mentioned IMS user-level control method and system based on subscription data, when the NASS system is not deployed in the IMS network, according to the user's account opening information, through the P-CSCF or S-CSCF in the SIP proxy server Proxy, or the application The server AS controls the QoS control process that is accurate to the user, and for multiple enterprise network users or home users registered in the IMS network at the same time, it can control the number of registered users or the number of concurrent sessions to ensure the normal registration and operation of multiple users. Sessions are not affected by interruptions.

The above description is only a preferred embodiment of the present invention, and of course the scope of rights of the present invention cannot be limited by this. It should be pointed out that for those of ordinary skill in the art, they can also Several improvements and changes are made, and these improvements and changes are also regarded as the protection scope of the present invention.

Claims (11)

1. An IMS user-level control method based on subscription data is characterized by comprising the following steps:

in an IMS network without a NASS subsystem, when a registration request or a session request of a user is received, user-level service control equipment acquires user information corresponding to a user identifier, and respectively performs user-level QoS control, registered user number control or concurrent session number control according to the acquired user information, wherein the user information comprises user position information, QoS Profile data, a maximum contact address number and a maximum concurrent session number, and the user information is stored in a user database UDB of the system when the user opens an account.

2. The method of claim 1, wherein:

the user-level service control equipment performs user-level QoS control according to the acquired user position information and QoS Profile data; or

The user-level service control equipment controls the number of registered users according to the acquired maximum contact address number; or

And the user-level service control equipment controls the number of concurrent sessions according to the acquired maximum number of concurrent sessions.

3. The method according to claim 1 or 2, characterized in that the user-level traffic control device is a SIP Proxy server Proxy, or an application server AS; the SIP Proxy server Proxy comprises a Proxy call session control function server P-CSCF, a service call session control function server S-CSCF and an inquiry call session control function server I-CSCF.

4. The method of claim 3, wherein the obtaining user information corresponding to a user identifier and performing user-level QoS control according to the obtained user information comprises:

the user registers on the service call session control function server S-CSCF through the proxy call session control function server P-CSCF;

when receiving a session request of a user, the service call session control function server S-CSCF acquires relevant user position information and QoS Profile data from a user database UDB, and returns the relevant user position information and QoS Profile data to the proxy call session control function server P-CSCF;

the P-CSCF issues the user position information and the QoS Profile data to an access network resource admission control function server A-RACF through a service strategy decision function server SPDF, and the A-RACF determines the QoS control strategy and returns the QoS control strategy to the SPDF;

and the SPDF issues the QoS control strategy to network equipment with a Qos control function, namely a boundary gateway function server BGF, and the network QoS control is carried out through the BGF.

5. The method of claim 3, wherein the obtaining user information corresponding to a user identifier and performing user-level QoS control according to the obtained user information comprises:

the service call session control function server S-CSCF receives and processes a session request of a user, acquires relevant user position information and QoS Profile data from a user database UDB, and triggers an application server AS by forwarding the user session request;

the application server AS accesses a user database UDB, inquires user subscription information comprising relevant user position information and QoS Profile data, judges whether the media type or the coding and decoding information in the user session request is signed according to the QoS Profile data, and rejects the session in a response returned to the S-CSCF or modifies the media type or the coding and decoding information in the user session request if the media type or the coding and decoding information in the user session request is not signed;

and the S-CSCF forwards the response to the user.

6. The method of claim 3, wherein the obtaining user information corresponding to a user identifier and performing user-level QoS control according to the obtained user information comprises:

the user registers on the service call session control function server S-CSCF, and acquires the relevant user position information and QoS Profile data from a user database UDB through the S-CSCF;

and the S-CSCF receives and processes a session request of a user, judges whether the media type or the coding and decoding information in the session request of the user is signed according to the acquired QoS Profile data, and rejects the session in a response returned to the user or modifies the media type or the coding and decoding information in the session request of the user if the media type or the coding and decoding information in the session request of the user is not signed.

7. The method according to claim 3, wherein the obtaining user information corresponding to a user identifier and controlling the number of registered users according to the obtained user information comprises:

when the SIP Proxy server Proxy receives a user registration request, acquiring the maximum contact address number corresponding to user identification information from a user database UDB;

the SIP Proxy server Proxy judges whether the number of the contact addresses of the registered users recorded locally is more than or equal to the maximum number of the contact addresses of the users for opening an account, if so, the registration is rejected; otherwise, the registration is carried out.

8. The method of claim 3, wherein the obtaining user information corresponding to a user identifier and performing concurrent session number control according to the obtained user information comprises:

when the SIP Proxy server Proxy receives a user registration request, acquiring the maximum concurrent session number corresponding to user identification information from a user database UDB;

after receiving the user session request, the SIP Proxy server Proxy judges whether the number of concurrent sessions corresponding to the user identification information and recorded locally is greater than or equal to the maximum number of concurrent sessions opened by the user, if so, the session request is rejected; otherwise, the session is carried out.

9. The method of claim 3, wherein the obtaining user information corresponding to a user identifier and performing concurrent session number control according to the obtained user information comprises:

when the application server AS receives a user session request transmitted from the SIP Proxy server Proxy, acquiring the maximum concurrent session number corresponding to user identification information from a user database UDB;

the application server AS judges whether the number of the concurrent sessions which are locally recorded and correspond to the user identification information is more than or equal to the maximum number of the concurrent sessions opened by the user, and if so, the application server AS rejects the session request; otherwise, the session is carried out.

10. An IMS subscriber-level control system based on subscription data, comprising:

the user database is used for storing user information corresponding to the user identification;

user-level service control equipment, which is used in an IMS network without a NASS subsystem, and when receiving a registration request or a session request of a user, acquires user information corresponding to a user identifier from a user database, and respectively performs user-level QoS control, or control of the number of registered users, or control of the number of concurrent sessions according to the acquired user information; the user information includes user location information, QoS Profile data, maximum number of contact addresses, maximum number of concurrent sessions.

11. The IMS subscriber-level control system according to claim 10, wherein the subscriber-level service control device is a SIP Proxy server Proxy or an application server AS; the SIP Proxy server Proxy comprises a Proxy call session control function server P-CSCF, a service call session control function server S-CSCF and an inquiry call session control function server I-CSCF.

Images