CN100397831C - A system and method for realizing IP multimedia service monitoring - Google Patents

Abstract

The invention discloses a system for monitoring IP multimedia services. The system includes: a monitoring center sends a monitoring command to CSCF, which includes the monitored user ID; and CSCF monitors in real time whether the user terminal corresponding to the monitored user ID is performing IP For multimedia service-related events or communications, if IP multimedia service-related events are in progress, the CSCF will notify the monitoring center of multimedia service control plane-related event information; if communication is in progress, the CSCF will order the GGSN to send the user’s communication content to the monitoring center, where Contains the address of the monitoring center; after receiving the command, the GGSN copies the communication data content of the monitored user, and sends the relevant event information of the user terminal and the copied user's communication data content to the monitoring center according to the address of the monitoring center. The invention also discloses a method for monitoring the IP multimedia service at the same time. The method can monitor the relevant event information and communication content of the IMS multimedia service.

Description

A system and method for realizing IP multimedia service monitoring

technical field

The invention relates to monitoring technology, in particular to a system and method for realizing IP multimedia service monitoring.

Background technique

With the development of mobile communication technology, people are no longer satisfied with a single voice communication method, but need a new multimedia communication method. This multimedia communication includes end-to-end video and audio communication, instant messaging, collaborative work and other services. mode and traditional voice services. Based on the trend of the convergence of Internet and telecommunication networks, the International Organization for Standardization of the Third Generation Mobile Communications (3GPP) introduced the IP Multimedia Subsystem (IMS) on the basis of the wireless packet bearer network. The access method controls the openness of service capabilities and provides multimedia communication experience.

The monitoring function is a function that most national security departments in the world require communication operators to provide. It mainly implements personal communication monitoring of certain specific users when national security or laws are involved. The monitoring function is mainly realized through the monitoring center authorized by the national security department and the mobile network communication equipment. At present, most countries have realized the monitoring of the voice service of the circuit domain of the mobile user, and some countries have realized the monitoring of the packet data service of the mobile user. For the developing IP multimedia service, there is no perfect monitoring scheme and monitoring system at present.

At present, the 3GPP specification supports the monitoring of IP multimedia service-related events, and the functional entities mainly involved include the monitoring center equipment, the proxy call state control entity (P-CSCF) and the serving call state control entity (S-CSCF) of the IP multimedia domain (IMS). ). The monitoring center issues a monitoring command to the CSCF (P-CSCF and/or S-CSCF), and the command includes the identifier of the monitored user. After the CSCF detects an event related to the user's IP multimedia service, it notifies the monitoring center of the relevant event information.

At the same time, the 3GPP specification supports monitoring of wireless packet data services, including monitoring of events related to packet data services and monitoring of user communication content. The main functional entities involved include listening center, packet domain equipment Serving GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN). The monitoring center sends a monitoring command to the GSN (SGSN and/or GGSN), and the command includes the identifier of the monitored user. After the GSN detects the user's packet data service-related event, it notifies the monitoring center of the packet data service-related event information, and at the same time After copying the content of the user's communication, send it to the monitoring center.

Because the control signaling of the IP multimedia service is implemented through the IP multimedia domain, and the user communication content is carried through the packet domain, there is a definite correlation between the control signaling and the user communication content. However, at present, IP multimedia domain monitoring and packet service monitoring are completely independent, and the two are not combined. When monitoring a user, the monitoring center can only monitor the IP multimedia service-related event information of the user, or monitor the Monitoring of event information related to user packet data services and user communication content. Since the packet domain of the mobile network carries IP multimedia services and other data services at the same time, such as Internet browsing, streaming services, etc., if the monitoring center needs to monitor a user's IP multimedia service-related event information and IP multimedia service communication content, but does not want to monitor This user has all packet data services, which cannot be realized at present. Considering that IP multimedia service is an end-to-end communication of a single media (including voice) or a combination of multiple media, it will be widely used in the near future, and all services in the circuit domain, including voice, will gradually be transferred to the IP multimedia domain, so the monitoring of IP multimedia services The signaling and user data of various countries will be relatively strong demand by the security departments of various countries.

To sum up, the current IP multimedia domain monitoring and packet service monitoring are completely independent, and the two are not combined. The monitoring center monitors the IP multimedia service of a certain user, and monitors the relevant event information of the user's IP multimedia service by issuing a monitoring command to the CSCF. Monitoring of event information and user communication content. Because the packet domain of the mobile network bears the weight of IP multimedia services and other data services at the same time, such as Internet browsing, streaming services, and so on. If the monitoring center needs to monitor the IP multimedia service-related event information and IP multimedia service communication content of a certain user, but does not want to monitor all the packet data services of the user, this requirement cannot be realized at present.

Contents of the invention

In view of this, the object of the present invention is to provide a system for monitoring IP multimedia services, enabling it to monitor IP multimedia service-related event information and communication content.

Another object of the present invention is to provide a method for monitoring IP multimedia services, which can implement monitoring of event information and communication content related to IP multimedia services.

A system for monitoring IP multimedia services provided by the present invention includes:

The monitoring center issues monitoring commands for monitoring IP multimedia service-related event information or/and communication content to the call control entity CSCF, and receives packet data service-related event information and user communication content sent by the gateway general packet radio service support node GGSN and sent by the CSCF. The relevant event information of the IP multimedia service; Include in the monitoring command the user identification to be monitored;

The CSCF is used to receive the monitoring command issued by the monitoring center, detect the related events of the monitored user corresponding to the monitored user according to the monitored user ID in the monitoring command, and send the detected multimedia service control plane related events to the monitoring center; The monitoring command monitors the IP multimedia service communication carried out by the user, and orders the GGSN to send the monitored communication content to the monitoring center;

GGSN, receives the activation request of the packet data protocol content from the user terminal, and communicates with the CSCF corresponding to the CSCF address information in the binding information; receives the monitoring command sent by the CSCF, copies the user communication content, and correlates the packet data protocol content Event information and copied user communications are sent to the listening center.

The CSCF is a P-CSCF.

The CSCF is a combination of P-CSCF and S-CSCF, and the S-CSCF and P-CSCF are connected through a signaling interface, wherein,

The S-CSCF is used to receive the monitoring command issued by the monitoring center, detect the related events of the monitoring user according to the monitoring command, and send the detected related events to the monitoring center; monitor the IP multimedia service communication performed by the user according to the monitoring command, and report to the monitoring center P-CSCF sends a command to send the monitored communication content to the monitoring center;

The P-CSCF is used to forward to the GGSN the command sent by the S-CSCF to send the monitored communication content to the monitoring center and to communicate with the GGSN.

There is a signaling interface between the listening center and the CSCF.

There are signaling interfaces and data interfaces between the listening center and the GGSN.

There is a signaling interface between CSCF and GGSN.

A kind of IP multimedia service monitoring method provided by the present invention comprises:

A. The monitoring center issues monitoring commands to the CSCF to monitor the user's IP multimedia service-related events and communication content, including the monitored user ID;

B. The CSCF monitors in real time whether the client corresponding to the intercepted user identifier is performing IP multimedia service-related events or communications,

If an IP multimedia service control plane-related event is in progress, the CSCF notifies the monitoring center of the multimedia service control plane-related event information;

If the communication is in progress, the CSCF instructs the GGSN to send the user’s communication content to the monitoring center, which contains the address of the monitoring center; after receiving the command, the GGSN will copy the communication data content of the monitored user, and send the user to the monitoring center according to the address of the monitoring center. The relevant event information of the terminal and the copied communication data content of the user are sent to the monitoring center.

The intercepted user identifier in step A is an initial session protocol SIP identifier, or a telephone number identifier.

The related events in step B include: registration, de-registration, and SIP call signaling.

When the CSCF in step A is the S-CSCF, in step B the S-CSCF instructs the GGSN to send the user's communication content to the monitoring center through the P-CSCF.

When the CSCF in step A is the P-CSCF, in step B the P-CSCF directly instructs the GGSN to send the user's communication content to the monitoring center.

The invention can monitor the relevant event information and communication content of the IMS multimedia service, and meet the requirement of the national security structure for the monitoring of the IP multimedia service.

Description of drawings

Fig. 1 is the system structural representation realizing the present invention;

Fig. 2 is a schematic flow chart for realizing the method of 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 network framework for monitoring IP multimedia service-related event information and communication content of the present invention is shown in FIG. 1 . The network function entities that implement monitoring include: monitoring center 101, CSCF 102, GGSN 103 and user terminal (UE) 104. Wherein, the interface between the monitoring center 101 and the CSCF 102 and the interface between the CSCF 102 and the GGSN 103 are signaling interfaces, and the interface between the monitoring center 101 and the GGSN 103 includes a signaling interface and a data interface. The IMS control signaling between UE 104 and IMS domain 105 is carried by PS domain 106, and user communication content is carried by PS domain 106 without passing through IMS domain 105. CSCF refers to P-CSCF and/or S-CSCF, and the interface between P-CSCF and S-CSCF is a signaling interface. The functions of the monitoring center are: to issue monitoring commands for IP multimedia service-related event information and communication content to CSCF, including the monitored user ID, which can be SIP ID or telephone number ID; receive packet data service-related event information sent by GGSN Communication content with users.

The functions of the CSCF include: detecting related events of the monitored user, such as registration, de-registration, SIP call signaling, etc., and notifying the monitoring center of relevant event information; detecting that the user's IP multimedia service communication content needs to be monitored, ordering the GGSN to The event information related to the packet data protocol content (PDP context) is notified to the monitoring center, and the user communication content is copied to the monitoring center. Here, the CSCF may be a P-CSCF, or the CSCF may be a combination of a P-CSCF and an S-CSCF.

When the CSCF is a combination of the P-CSCF and the S-CSCF, the S-CSCF and the P-CSCF are connected through a signaling interface. The CSCF receiving the monitoring command may have three situations: P-CSCF receiving, P-CSCF and S-CSCF both receiving, and S-CSCF receiving. After receiving the monitoring request, the P-CSCF sends an order to the GGSN, and the S-CSCF sends an order to the GGSN through the P-CSCF after receiving the monitoring request.

If the S-CSCF receives the monitoring command, the S-CSCF detects and monitors the user's multimedia service control plane related events according to the monitoring command and sends the detected related events to the monitoring center; monitors the user's IP multimedia service communication according to the monitoring command , and send a command to the GGSN through the P-CSCF to send the monitored communication content to the monitoring center;

GGSN functions include: find the corresponding CSCF through the CSCF address information in the binding information carried in the PDP context activation signaling initiated by the UE, and actively initiate communication with the CSCF; accept and execute the monitoring command of the CSCF, and send PDP context related event information Notify the monitoring center, and copy the content of the user's communication and send it to the monitoring center.

For the above network framework, the process of monitoring IP multimedia service-related event information and communication content is as follows:

Step 201: The interception center issues an interception command to the CSCF, which includes an intercepted user ID, which can be a SIP ID or a telephone number ID, and the intercepted content includes IP multimedia service-related event information and communication content of the monitored user.

Step 202: After receiving the monitoring command, the CSCF detects relevant events related to the multimedia service control plane of the corresponding monitored user according to the monitored user ID, such as registration, de-registration, SIP call signaling, etc., and sends the detected related events The information notifies the monitoring center.

Step 203: When the user terminal needs to transmit user data, the GGSN initiates a packet domain PDP context activation process, which includes binding information, and the GGSN finds the corresponding CSCF according to the CSCF address information in the binding information, and initiates communication with the CSCF.

Step 204: The CSCF judges whether it is necessary to monitor the user's IP multimedia service communication content, and if so, orders the GGSN to notify the monitoring center of the PDP context-related event information, and copies the user's communication content to the monitoring center. The command includes Listen to the address of the center, and then execute step 205, otherwise, jump out of this process.

When the monitoring center issues a monitoring command to the S-CSCF in the CSCF, because there is a signaling interface between the P-CSCF and the GGSN, the S-CSCF needs to instruct the GGSN to send the user’s communication content to the monitoring center through the P-CSCF, and When the monitoring center issues a monitoring command to the P-CSCF in the CSCF, the P-CSCF can directly instruct the GGSN to send the user's communication content to the monitoring center.

Step 205: After receiving the CSCF command, the GGSN notifies the monitoring center of the PDP context-related event information according to the monitoring center address in the command, and copies the user communication content and sends it to the monitoring center.

It can be seen from the above process that the interception center issues an interception command containing the monitored user ID to the CSCF, and the CSCF monitors in real time whether the user end corresponding to the monitored user ID is performing IP multimedia service-related events or communications. If there is a service-related event, the CSCF will notify the monitoring center of the event information related to the multimedia service control plane; if the communication is in progress, the CSCF will order the GGSN to send the communication content of the user to the monitoring center, and then the GGSN will copy the communication data content of the monitored user and follow the The address of the monitoring center contained in the command sends the relevant event information of the user terminal and the copied communication data content of the monitored user to the monitoring center to complete the monitoring of the user's IP multimedia service-related events and communication content.

Claims (11)

1. A system that carries out IP multimedia service monitoring, is characterized in that, the system comprises: The monitoring center issues monitoring commands for monitoring IP multimedia service-related event information or/and communication content to the call control entity CSCF, and receives packet data service-related event information and user communication content sent by the gateway general packet radio service support node GGSN and sent by the CSCF. The relevant event information of the IP multimedia service; Include in the monitoring command the user identification to be monitored; The CSCF is used to receive the monitoring command issued by the monitoring center, detect the related events of the monitored user corresponding to the monitored user according to the monitored user ID in the monitoring command, and send the detected multimedia service control plane related events to the monitoring center; The monitoring command monitors the IP multimedia service communication carried out by the user, and orders the GGSN to send the monitored communication content to the monitoring center; GGSN, receives the activation request of the packet data protocol content from the user terminal, and communicates with the CSCF corresponding to the CSCF address information in the binding information; receives the monitoring command sent by the CSCF, copies the user communication content, and correlates the packet data protocol content Event information and copied user communications are sent to the listening center. 2. The system according to claim 1, wherein the CSCF is a proxy call state control entity P-CSCF. 3. The system according to claim 1, wherein the CSCF is a combination of a P-CSCF and a serving call state control entity S-CSCF, and the S-CSCF and the P-CSCF are connected through a signaling interface, in, The S-CSCF is used to receive the monitoring command issued by the monitoring center, detect the related events of the monitoring user according to the monitoring command, and send the detected related events to the monitoring center; monitor the IP multimedia service communication performed by the user according to the monitoring command, and report to the monitoring center P-CSCF sends a command to send the monitored communication content to the monitoring center; The P-CSCF is used to forward to the GGSN the command sent by the S-CSCF to send the monitored communication content to the monitoring center and to communicate with the GGSN. 4. The system according to claim 1, wherein a signaling interface is used between the monitoring center and the CSCF. 5. The system according to claim 1, characterized in that there are signaling interfaces and data interfaces between the listening center and the GGSN. 6. The system according to claim 1, wherein a signaling interface is used between the CSCF and the GGSN. 7. a method utilizing the system of claim 1 to carry out IP multimedia service monitoring, is characterized in that, the method comprises the following steps: A. The monitoring center issues monitoring commands to the CSCF to monitor the user's IP multimedia service-related events and communication content, including the monitored user ID; B. The CSCF monitors in real time whether the client corresponding to the intercepted user identifier is performing IP multimedia service-related events or communications, If an IP multimedia service control plane-related event is in progress, the CSCF notifies the monitoring center of the multimedia service control plane-related event information; If the communication is in progress, the CSCF instructs the GGSN to send the user’s communication content to the monitoring center, which contains the address of the monitoring center; after receiving the command, the GGSN will copy the communication data content of the monitored user, and send the user to the monitoring center according to the address of the monitoring center. The relevant event information of the terminal and the copied communication data content of the user are sent to the monitoring center. 8 . The method according to claim 7 , wherein the intercepted user identifier in step A is an initial session protocol (SIP) identifier, or a telephone number identifier. 9. The method according to claim 7, wherein the relevant events in step B include: registration, de-registration, and SIP call signaling. 10. The method according to claim 7, wherein when the CSCF in step A is the S-CSCF, in step B the S-CSCF instructs the GGSN to send the user's communication content to the monitoring center through the P-CSCF. 11. The method according to claim 7, wherein when the CSCF in step A is the P-CSCF, in step B the P-CSCF directly instructs the GGSN to send the user's communication content to the monitoring center.

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