CN102843337A - Method and device for monitoring media content in IP (internet protocol) multimedia sub-system - Google Patents

Abstract

The invention discloses a method for monitoring media contents in an IP (internet protocol) multimedia sub-system. The method comprises the following steps: controlling a media device to copy monitoring contents by an access gateway control function entity (AGCF), reporting the monitoring contents to a monitoring center LIC (linear integrated circuit), or transmitting a media copying instruction to an IMS (information management system) access device/edge device by IMS network equipment when a monitored call is begun, and transmitting a media copying conceal instruction to the IMS access device/edge device by the IMS network equipment when the monitored call is finished. The invention also discloses a media content monitoring device in the IP multimedia sub-system for achieving the method. According to the method for monitoring media contents in the IP (internet protocol) multimedia sub-system, an X3 channel is directly consulted between the AGCF and DF3, so that a faster network which is small in change of the existing system and can be compatible with various bearing layers is built by the X3 channel.

Description

Method and device for monitoring media content in IP multimedia subsystem

technical field

The present invention relates to the monitoring technology in the IP Multimedia Subsystem (IMS, IP Multimedia Subsystem) network architecture, in particular to a media content monitoring method and device in the IP Multimedia Subsystem, and an Access Gateway Control Functional Entity (AGCF, Access Gateway Control Function). the

Background technique

The Internet Protocol Multimedia Subsystem (IMS, IP Multimedia Subsystem) is the development direction of future multimedia communication, and it is also the most important part of the next generation network. It is a subsystem supporting IP multimedia services proposed by the Third Generation Partnership Project (3GPP, Third Generation Partnership Project). Its notable feature is that it adopts the Session Initial Protocol (SIP, Session Initial Protocol) system, and the communication has nothing to do with the access mode. , can have a variety of capabilities such as separation of multimedia service control functions and bearer capabilities, separation of calls and sessions, separation of applications and services, separation of services and networks, and integration of mobile network and Internet services. the

Just because communication technology is becoming more and more powerful and penetrates into all aspects of society and life, the situation of using communication technology to engage in illegal and criminal activities is also becoming more and more serious. Lawful interception technology has become a powerful weapon for national security departments to combat criminal activities. Lawful interception means that the security agency sets a specific interception target on the communication device for the needs of law enforcement, and monitors the session events and communication content of the interception target. It is an indispensable function in the communication field. European Telecommunications Standards Institute (ETSI, European Telecommunications Standards Institute), 3GPP and other standard organizations have been formulating relevant standards for lawful interception. At present, the lawful interception in the field of IMS network has also formed the corresponding standard, and can guide the specific implementation. the

Fig. 1 is a schematic diagram of 3GPP packet switching lawful interception architecture, as shown in Fig. 1, 3GPP has proposed a kind of lawful interception standard in IMS packet switching (PS, Packet Switch) network field. Among them, monitoring is based on the following three interfaces:

HI1 interface, used to implement control management;

HI2 interface, used to report the intercept related information (IRI, Intercept Related Information) of the intercepted target communication;

HI3 interface, used to output the communication content (CC, Communication Content) of the monitored target;

Control the bearer layer network through HI1, output HI2 interface messages to the control layer equipment such as call session control function entity (CSCF, Call Session Control Function), and output HI3 communication content to the bearer layer network. In the figure, X1 to X3 are the interfaces connecting the IMS and the GSN, respectively corresponding to the HI1 interface to the HI3 interface. the

This standard can be applied to include law enforcement monitoring unit (LEMF, Law Enforcement Monitoring Facility), management function (ADMF, Administration Function), data transmission function 2 (DF2, Delivery Function2), data transmission function 3 (DF3, Delivery Function3) In the monitoring system of Gigabyte System Network (GSN, Gigabyte System Network) and monitoring equipment. the

LEMF notifies the monitoring request to ADMF through HI1, and the request message carries information such as the identity of the monitoring object; ADMF sends the monitoring request message to the bearer layer network GSN through X1_1, carrying information such as the identity of the monitoring object; in the IMS domain, ADMF will monitor The request message is sent to the proxy call session control function entity (P-CSCF, Proxy Call Session Control Function)/serving call session control function entity (S-CSCF, Serving-Call Session Control Function); ADMF sends the monitoring request message to DF3, carrying information such as the monitoring object identity; during the period from the beginning of the session to the end of the session, in the IMS domain, when the session request is routed to the P-CSCF/S-CSCF via the GSN, when the P-CSCF/S-CSCF judges that the user is monitored , monitor the monitored object according to the monitored object identifier; P-CSCF/S-CSCF reports the IRI during the session to DF2 through X2; GSN reports the CC during the session to DF3 through X3; DF2 according to the monitoring request from ADMF, Report the received IRI to LEMF through HI2 after MF processing; DF3 reports the received CC to LEMF through HI3 according to the monitoring request from ADMF after MF processing. the

Today, in practical applications, in the next-generation network with IMS as the core, there are various types of bearer layer networks, including wireless local area networks (WLAN, Wireless Local Area Networks), local area networks (LAN, Local Area Networks), etc. As a result, it becomes very difficult for lawful interception in the IMS network field to adapt to various bearer layer networks. At the same time, it is required that many bearer layer networks can realize the monitoring function, which is difficult to realize in reality. Many devices may not be able to provide the monitoring function in the live network, which will make the monitoring function unavailable. the

Contents of the invention

In view of this, the main purpose of the present invention is to provide a media content monitoring method and device in the IP multimedia subsystem, and an AGCF, which can report the CC of the session to be monitored to the LIC by the AGCF. the

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for monitoring media content in an IP multimedia subsystem, comprising:

The AGCF controls the media device to copy the monitoring content, and reports the monitoring content to the monitoring center LIC. the

Preferably, the reporting of the monitoring content to the LIC is:

Report the monitoring content to the LIC through the X3 interface between the AGCF and the LIC. the

Preferably, reporting the monitoring content to the LIC through the X3 interface between the AGCF and the LIC is:

The AGCF calls the LIC through the INVITE message, and negotiates with the LIC the bearer channel used to carry the monitoring content;

The AGCF controls the media device to copy the monitored content, and sends it to the LIC through the bearer channel. the

Preferably, the method also includes:

After the monitoring content is reported, the AGCF releases the bearer channel by sending a BYE signaling to the LIC. the

Preferably, the monitored content is the communication content of the session to be monitored. the

A method for monitoring media content in an IP multimedia subsystem, comprising:

When the monitored call starts, the IMS network device sends a media copy instruction to the IMS access device/border device;

When the monitored call ends, the IMS network device sends a media copy cancellation instruction to the IMS access device/border device. the

Preferably, the method also includes:

When the IMS access device/border device receives the media copy instruction, it reports the communication content of the monitored call to the LIC in real time;

When the IMS access device/border device receives the media copy cancel instruction, it stops reporting the communication content of the monitored call to the LIC, and releases the resources established for transmitting the communication content of the monitored call. the

Preferably, the media copy indication and the media copy cancellation indication are carried in a SIP INFO message for transmission. the

Preferably, the IMS network device is a serving call session control function entity S-CSCF, or a proxy call session control function entity P-CSCF, or is a monitoring application server AS, or is a call content triggering function entity CCTF;

The IMS access device/border device is a border session control entity SBC, or an interconnected border control function entity IBCF. the

Preferably, the communication content of the monitored call includes at least one of the following information:

Voice, video, fax, SMS, whiteboard application content, multimedia MMS content. the

A media content monitoring device in an IP multimedia subsystem, including a control unit and a reporting unit, wherein:

The control unit is used to control the media device to copy the monitoring content;

A reporting unit, configured to report the monitoring content to the LIC. the

Preferably, the reporting unit reports the monitoring content to the LIC through the X3 interface between the AGCF and the LIC. the

Preferably, the device also includes a call unit and a negotiation unit, wherein:

A calling unit is used to call the LIC through the INVITE message;

a negotiation unit, configured to negotiate with the LIC the bearer channel used to carry the monitored content;

The reporting unit further reports the monitoring content to the LIC through the bearer channel. the

A media content listening device in an IP multimedia subsystem, comprising:

A sending unit, configured to send a media copy instruction to the IMS access device/border device when the monitored call starts; and send a media copy cancellation instruction to the IMS access device/border device when the monitored call ends . the

Preferably, the device further includes a receiving unit, a reporting unit and a releasing unit arranged in the IMS access device/border device, wherein:

The receiving unit is used for receiving a media copy instruction or a media copy cancellation instruction;

A reporting unit, configured to report the communication content of the monitored call to the LIC in real time when the receiving unit receives the media copy instruction;

The releasing unit is configured to stop the reporting unit from reporting the communication content of the monitored call when the receiving unit receives the media copy cancellation instruction, and release the resources established for transmitting the communication content of the monitored call. the

In the present invention, the AGCF and the LIC negotiate and report the port related information of the CC to be monitored, and the AGCF sends the CC to be monitored to the LIC through the negotiated port through DF3. The present invention does not need to negotiate the interface of the X3 channel between the IMS and the LIC, but directly negotiates the X3 channel between the AGCF and the DF3, so that the establishment of the X3 channel is faster. Moreover, through direct negotiation between the IMS network device and DF3, the DF3 receives the port-related information of the CC to be monitored, and sends it directly to the IMS access gateway/IBCF. In this way, the IMS access gateway/IBCF obtains the port of the CC of DF3 After obtaining the relevant information, after obtaining the CC of the session to be monitored, it can be directly sent to the determined port. The present invention can monitor the session without making major changes to the existing IMS network, and because the IMS access gateway/IBCF is set, it can be compatible with various bearing layer networks. The invention can monitor the session without making major changes to the existing IMS network. the

Description of drawings

Figure 1 is a schematic diagram of the 3GPP packet switching lawful interception architecture;

Fig. 2 is a schematic diagram of the lawful interception architecture of the IMS network of the present invention;

Fig. 3 is the flow chart of media content monitoring method in IP multimedia subsystem of the present invention;

FIG. 4 is a schematic diagram of another IMS network lawful interception architecture of the present invention;

Fig. 5 is the flow chart that AS/S-CSCF and IMS access gateway/IBCF interact among the present invention;

Fig. 6 is the flow chart that P-CSCF and IMS access gateway/IBCF interact among the present invention;

Fig. 7 is the composition structure schematic diagram of the media content monitoring device in the IP multimedia subsystem of the present invention;

FIG. 8 is a schematic diagram of the composition and structure of a media content monitoring device in another IP multimedia subsystem of the present invention. the

Detailed ways

The basic idea of the present invention is to add an IMS access gateway (IMS-Access GateWay)/border control function entity (IBCF, Interconnection Border Control Functions) between the IMS network and the bearer layer network, and connect the bearer layer network by the AGCF . In this way, the relevant information in the session establishment process is sent to the IMS through the AGCF, and the IMS outputs an IRI. Of course, IMS can also output CC, but there will be a phenomenon of media detour; since AGCF has no media negotiation capability, the present invention adopts the method of notifying AGCF of the port information reported by CC after media negotiation with DF3 through AGCF or IMS network equipment, The CC is directly output from the AGCF to DF3. Wherein, the AGCF may be a border session control entity (SBC, Session Border Control), but it is not limited to this device. the

Fig. 2 is a schematic diagram of the lawful interception architecture of the IMS network of the present invention, as shown in Figure 2, compared with the lawful interception architecture of 3GPP packet switching shown in Fig. , LAN, etc.) are connected to the IMS through the AGCF, and the following describes each network element and the information exchange mode between them in detail. the

LEMF notifies ADMF of the interception request through HI1, and the request message carries information such as the identity of the interception object; ADMF sends the interception request message to the bearer network GSN/.../WLAN/LAN through X1_1, carrying information such as the identity of the interception object ; ADMF sends the monitoring request message to IMS through X1_3, carrying information such as the monitoring object identity; ADMF sends the monitoring request message to DF2 through X1_4, carrying information such as the monitoring object identity; ADMF sends the monitoring request message to DF3 through X1_5, Carry information such as the identity of the monitored object; during the session establishment process, when the session request passes through GSN/.../WLAN/LAN, GSN/.../WLAN/LAN judges that the user is monitored, and monitors the monitored object according to the monitored object ID. Send the monitoring object session-related information to AGCF; AGCF adapts the session information sent by the bearer layer network GSN/.../WLAN/LAN and sends it to IMS through the Adaptation Function Interface (AFI, Adaptation Function Interface); IMS according to The monitoring request from ADMF determines that the user is being monitored, and after processing the session information sent by AGCF, reports the IRI event during session establishment to DF2 through X2; at the same time, the IMS determines that the user is being monitored based on the monitoring request from ADMF. It can also report the CC during session establishment to DF3 through X3. However, if the IMS reports the CC to DF3 through X3, there will be a media detour problem, that is, the AGCF first needs to send the CC to the IMS, and the IMS then sends the CC to DF3. The media negotiation is an end-to-end media negotiation that does not go through the IMS, but the Session Description Protocol (SDP, Session Description Protocol) goes through the IMS; if the IMS needs to report the CC, the media must be uploaded to the IMS, that is, the AGCF must upload the media to the IMS. The communication content is also sent to the IMS, so that each end must pass the IMS to conduct media negotiation, which causes media detour. To solve the above problem, in order to solve the media detour caused by IMS reporting CC, AGCF is used to report CC. the

Aiming at the above-mentioned scenario problem, the technical solution of the present invention is mainly that when the AGCF determines that the session to be monitored is opened, media negotiation with DF3 (MGW/MGCF) on the IP and port is carried out. After the media negotiation is completed, the AGCF can directly transfer the CC of the session to be monitored to Report to LIC through DF3. According to the monitoring request from ADMF, DF2 reports the received IRI to LEMF through HI2 after MF processing; DF3 reports the received CC to LEMF through HI3 after MF processing according to the monitoring request from ADMF. the

In the present invention, the main functions of the X3 interface of the AGCF are: X3 signaling channel establishment request; X3 signaling channel establishment response; X3 signaling channel deletion request; X3 signaling channel deletion response; X3 signaling channel media capability modification; , the X3 bearer channel monitors content transmission. the

The X3 interface protocol between AGCF and DF3 adopts SIP protocol, and its working process includes two parts: call signaling process and bearer channel data transmission. The X3 interface signaling process between AGCF and DF3 adopts the SIP protocol process, and its working protocol stack follows RFC3261. The signaling process of the X3 interface between AGCF and DF3 is generated by the AGCF network element, which mainly completes functions such as channel establishment, deletion, and media capability modification. The X3 bearer channel mainly realizes the transmission of the communication content of the controlled target. the

Fig. 3 is the flowchart of the method for monitoring media content in the IP multimedia subsystem of the present invention. As shown in Fig. 3, when the controlled target call is established successfully and the media stream transmission starts, the AGCF will initiate the process of monitoring the content of the message. Specifically, the AGCF sends the X3 channel creation request process to the LIC, and the LIC returns the X3 channel creation response message 200 OK after receiving the X3 channel creation request INVITE message. AGCF can obtain endpoint information through this process, and transmit a copy of the communication content of the accused target. It should be noted that, generally speaking, the AGCF needs to report the CC of the session to be monitored to the LIC through DF3; in this example, the media content monitoring method in the IP multimedia subsystem specifically includes the following steps:

Step F1, AGCF sends an INVITE message to the LIC through DF3 to (MGW/MGCF), requesting information such as dynamically allocated IP and port;

Step F2, the LIC replies to the AGCF with a 200 OK response through DF3 (MGW/MGCF) to send an INVITE message, and the INVITE message carries information such as dynamically allocated IP and/or port;

In step F3, the AGCF replies with an Ack confirmation message to the LIC, confirming that the information such as IP and/or port has been received. AGCF establishes X3 channel with LIC (DF3 and LIC) according to information such as IP and/or port assigned by LIC reply. the

After receiving the information such as IP and/or port, AGCF receives the communication content of the session to be monitored and sends it directly to LIC through X3. The follow-up processing method is exactly the same as that of the prior art, and its implementation details are not repeated here. the

In the present invention, after the monitoring content is reported, the AGCF releases the bearer channel by sending a BYE signaling to the LIC. the

In the present invention, the communication content of the monitored call includes at least one of the following information:

Voice, video, fax, SMS, whiteboard application content, multimedia MMS content. the

Or, the method for monitoring media content in the IP multimedia subsystem of the present invention can also be realized in the following manner:

Fig. 4 is a schematic diagram of another IMS network legal interception architecture of the present invention, as shown in Fig. 4, compared with the 3GPP packet switching legal interception architecture shown in Fig. , WLAN, LAN, etc.) are connected to the IMS through the IMS access gateway/IBCF. The following describes each network element and the information exchange mode between them in detail. the

LEMF notifies ADMF of the interception request through HI1, and the request message carries information such as the identity of the interception object; ADMF sends the interception request message to the bearer network GSN/.../WLAN/LAN through X1_1, carrying information such as the identity of the interception object ; ADMF sends the monitoring request message to IMS through X1_3, carrying information such as the monitoring object identity; ADMF sends the monitoring request message to DF2 through X1_4, carrying information such as the monitoring object identity; ADMF sends the monitoring request message to DF3 through X1_5, Carry information such as the identity of the monitored object; during the session establishment process, when the session request passes through GSN/.../WLAN/LAN, GSN/.../WLAN/LAN judges that the user is monitored, and monitors the monitored object according to the monitored object ID. Send the monitoring object session-related information to the IMS access gateway/IBCF; the IMS access gateway/IBCF adapts the session information sent by the bearer layer network GSN/.../WLAN/LAN through the adaptation function interface (AFI, Adaptation Function Interface) to IMS; IMS judges that the user is monitored according to the monitoring request from ADMF, processes the session information sent by the IMS access gateway/IBCF, and reports the IRI event during session establishment to DF2 through X2 ; At the same time, the IMS judges that the user is monitored according to the monitoring request from the ADMF, and may also report the CC in the session establishment process to the DF3 through X3. However, if the IMS reports the CC to DF3 through X3, there will be a media detour problem, that is, the IMS access gateway/IBCF first needs to send the CC to the IMS, and then the IMS sends the CC to DF3. The media negotiation is an end-to-end media negotiation that does not go through the IMS, but the Session Description Protocol (SDP, Session Description Protocol) goes through the IMS; if the IMS needs to report the CC, the media must be uploaded to the IMS, that is, the IMS access gateway /IBCF must also send media communication content to IMS, so that each end must pass through IMS to perform media negotiation, which causes media detour. In view of the above problems, in order to solve the media detour caused by IMS reporting CC, the IMS access gateway/IBCF is used to report CC . However, the IMS access gateway/IBCF reporting CC brings another problem: since the IMS access gateway/IBCF has no media negotiation capability, the media gateway (MGW, Media GateWay)/media gateway control function entity (MGCF, Media GateWay Control Function ) is dynamically allocated IP and port. When DF3 is MGW/MGCF equipment, IMS access gateway/IBCF has no ability to negotiate with MGW/MGCF media to obtain dynamically allocated IP and port, so it cannot report to CC;

Aiming at the above-mentioned scene problem, the technical solution of the present invention mainly uses the IMS network equipment and DF3 (MGW/MGCF) to carry out media negotiation IP and port, after the media negotiation is completed, the IMS network equipment notifies the IMS access gateway of the IP and port after the media negotiation /IBCF. In this way, the IMS access gateway/IBCF can directly report the CC to DF3. The call content trigger function entity (CCTF, Content Of Communication Trigger Function) in IMS judges that the user is monitored according to the monitoring request from ADMF, and communicates with DF3 (MGW/ MGCF) conduct media negotiation; among them, CCTF can be AS/CSCF (S-CSCF or P-CSCF); CCTF (AS/CSCF) will negotiate with DF3 (MGW/MGCF) information (IP and port, etc.) through The call content control interface (CCCI, Call Content Control Interface) sends to the IMS access gateway/IBCF; the IMS access gateway/IBCF reports the CC to DF3 through the media negotiation information sent from the CCTF (AS/CSCF); According to the monitoring request from ADMF, DF3 reports the received CC to LEMF through HI3 after MF processing according to the monitoring request from ADMF. the

Those skilled in the art should understand that the above-mentioned CCNI and CCCI interfaces are only illustrative, and the present invention is not limited to the above-mentioned interfaces, and may also be other interfaces defined by the protocol. But the messages between the above interfaces are deterministic. the

The aforementioned CSCF may be an S-CSCF or a P-CSCF. the

CCTF negotiates with DF3 to control the IMS access gateway/IBCF to output CC; among them, CCTF can be AS/S-CSCF; AS/S-CSCF interacts with IMS access gateway/IBCF through the control interface, specifically through INFO/ 200OK message for interaction. the

Fig. 5 is the flow chart that AS/S-CSCF and IMS access gateway/IBCF carry out interaction among the present invention, as shown in Fig. 5, specifically comprises the following steps:

1) AS/S-CSCF sends an INVITE message to DF3 (MGW/MGCF) to request information such as dynamically allocated IP and port;

2) DF3 (MGW/MGCF) replies with 200OK to AS/S-CSCF to send an INVITE message, and the INVITE message carries information such as dynamically allocated IP and/or port;

3) AS/S-CSCF sends information such as IP and/or port assigned by DF3 (MGW/MGCF) to IMS access gateway/IBCF through INFO message;

4) The IMS access gateway/IBCF replies 200 OK to the AS/S-CSCF, confirming the receipt of information such as IP and/or port. the

After receiving information such as IP and/or port, after receiving the communication content of the session to be monitored, the IMS access gateway/IBCF directly sends it to the received IP and/or port determined for the session. The subsequent processing method is completely the same as that of the prior art, and the implementation details thereof will not be repeated here. the

In the present invention, CCTF negotiates with DF3 to control IMS access gateway/IBCF to output CC; wherein, CCTF can be P-CSCF; there is an internal private interface in P-CSCF, i.e. Application Level Gateway (ALG, Application Level GateWay); The P-CSCF performs information interaction with the IMS access gateway/IBCF through the ALG through the control interface, specifically through the H.248 message. Fig. 6 is the flow chart of interaction between P-CSCF and IMS access gateway/IBCF among the present invention, as shown in Fig. 6, specifically comprises the following steps:

1) P-CSCF sends an INVITE message to DF3 (MGW/MGCF), requesting information such as dynamically allocated IP and port;

2) DF3 (MGW/MGCF) replies with 200OK to P-CSCF to send an INVITE message, carrying information such as dynamically allocated IP and/or port;

3) P-CSCF sends information such as IP and/or port allocated by DF3 (MGW/MGCF) to IMS access gateway/IBCF through H.248 message through its own internal private interface ALG. the

After receiving information such as IP and/or port, after receiving the communication content of the session to be monitored, the IMS access gateway/IBCF directly sends it to the received IP and/or port determined for the session. The subsequent processing method is completely the same as that of the prior art, and the implementation details thereof will not be repeated here. the

Fig. 7 is a schematic diagram of the composition structure of the media content monitoring device in the IP multimedia subsystem of the present invention. As shown in Fig. 7, the media content monitoring device in the IP multimedia subsystem of the present invention includes a control unit 70 and a reporting unit 71, wherein:

The control unit 70 is used to control the media equipment to copy the monitoring content;

The reporting unit 71 is configured to report the monitoring content to the LIC. the

The reporting unit 70 reports the monitoring content to the LIC through the X3 interface between the AGCF and the LIC. the

On the basis of the media content monitoring device in the IP multimedia subsystem shown in Figure 7, the media content monitoring device in the IP multimedia subsystem of the present invention also includes a calling unit (not shown in Figure 7) and a negotiation unit (not shown in Figure 7) ),in:

A calling unit is used to call the LIC through the INVITE message;

a negotiation unit, configured to negotiate with the LIC the bearer channel used to carry the monitored content;

The reporting unit 71 further reports the monitoring content to the LIC through the bearer channel. the

After the reporting unit 71 finishes reporting the monitored content, the control unit 70 releases the bearer channel by sending a BYE signaling to the LIC. the

The monitoring content is the communication content of the session to be monitored. the

In the present invention, the communication content of the session to be monitored includes at least one of the following information:

Voice, video, fax, SMS, whiteboard application content, multimedia MMS content. the

Those skilled in the art should understand that the media content monitoring device in the IP multimedia subsystem shown in Figure 7 of the present invention is designed for realizing the media content monitoring method in the aforementioned IP multimedia subsystem, and the realization functions of the above-mentioned processing units can refer to It can be understood from the relevant description of the method for listening to media content in the aforementioned IP multimedia subsystem. The functions of each processing unit in the figure can be realized by a program running on a processor, or by a specific logic circuit. the

Fig. 8 is a schematic diagram of the composition and structure of a media content monitoring device in another IP multimedia subsystem of the present invention. As shown in Fig. 8, the device includes:

The sending unit 80 is configured to send a media copy instruction to the IMS access device/border device when the monitored call starts; and send a media copy cancel to the IMS access device/border device when the monitored call ends instruct. the

On the basis of the media content monitoring device in the IP multimedia subsystem shown in Figure 8, the media content monitoring device in the IP multimedia subsystem of the present invention also includes a receiving unit 81, a reporting unit 82 and release unit 83, wherein:

The receiving unit 81 is configured to receive a media copy instruction or a media copy cancellation instruction;

The reporting unit 82 is used to report the communication content of the monitored call to the LIC in real time when the receiving unit receives the media copy instruction;

The releasing unit 83 is configured to stop the reporting unit from reporting the communication content of the monitored call when the receiving unit receives the media copy cancellation instruction, and release the resources established for transmitting the communication content of the monitored call. the

The media duplication indication and the media duplication cancellation indication are carried in a SIP INFO message for transmission. the

The IMS network device is an S-CSCF, or a P-CSCF, or an listening AS, or a CCTF;

The IMS access device/border device is a border session control entity SBC, or an interconnected border control function entity IBCF. the

Those skilled in the art should understand that the media content monitoring device in the IP multimedia subsystem shown in Figure 8 of the present invention is designed for realizing the aforementioned media content monitoring method in the IP multimedia subsystem, and the implementation functions of the above-mentioned processing units can be referred to It can be understood from the relevant description of the method for listening to media content in the aforementioned IP multimedia subsystem. The functions of each processing unit in the figure can be realized by programs running on the processor, or by specific logic circuits. the

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. the

Claims (15)

1. a media content monitoring method in an IP multimedia subsystem, is characterized in that, described method comprises: The access gateway control function entity AGCF controls the media device to copy the interception content, and reports the interception content to the interception center LIC. 2. The method according to claim 1, wherein the reporting of the monitoring content to the LIC is: Report the monitoring content to the LIC through the X3 interface between the AGCF and the LIC. 3. The method according to claim 2, characterized in that, reporting the monitoring content to the LIC through the X3 interface between the AGCF and the LIC is: The AGCF calls the LIC through an INVITE message, and negotiates with the LIC on a bearer channel for carrying the monitoring content; The AGCF controls the media device to copy the monitored content, and sends it to the LIC through the bearer channel. 4. method according to claim 3, is characterized in that, described method also comprises: After the monitoring content is reported, the AGCF releases the bearer channel by sending a BYE signaling to the LIC. 5. The method according to any one of claims 1 to 4, wherein the monitored content is the communication content of the session to be monitored. 6. a method for listening to media content in an IP multimedia subsystem, characterized in that the method comprises: When the monitored call starts, the IMS network device sends a media copy instruction to the IMS access device/border device; When the monitored call ends, the IMS network device sends a media copy cancellation instruction to the IMS access device/border device. 7. The method according to claim 6, further comprising: When the IMS access device/border device receives the media copy instruction, it reports the communication content of the monitored call to the LIC in real time; When the IMS access device/border device receives the media copy cancel instruction, it stops reporting the communication content of the monitored call to the LIC, and releases the resources established for transmitting the communication content of the monitored call. 8. The method according to claim 6, wherein the media copy indication and the media copy cancellation indication are carried in a SIP INFO message for transmission. 9. The method according to claim 6, wherein the IMS network device is a serving call session control function entity S-CSCF, or a proxy call session control function entity P-CSCF, or an interception application server AS, Or trigger the functional entity CCTF for the call content; The IMS access device/border device is a border session control entity SBC, or an interconnected border control function entity IBCF. 10. The method according to claim 6, wherein the communication content of the monitored call includes at least one of the following information: Voice, video, fax, SMS, whiteboard application content, multimedia MMS content. 11. A device for listening to media content in an IP multimedia subsystem, characterized in that the device includes a control unit and a reporting unit, wherein: a control unit, configured to control the media device to copy the monitoring content; A reporting unit, configured to report the monitoring content to the LIC. 12. The device according to claim 11, wherein the reporting unit reports the monitoring content to the LIC through an X3 interface between the AGCF and the LIC. 13. The device according to claim 12, further comprising a calling unit and a negotiating unit, wherein: A calling unit is used to call the LIC through the INVITE message; a negotiation unit, configured to negotiate with the LIC the bearer channel used to carry the monitoring content; The reporting unit further reports the monitoring content to the LIC through the bearer channel. 14. A device for listening to media content in an IP multimedia subsystem, characterized in that the device comprises: A sending unit, configured to send a media copy instruction to the IMS access device/border device when the monitored call starts; and send a media copy cancellation instruction to the IMS access device/border device when the monitored call ends . 15. The device according to claim 14, further comprising a receiving unit, a reporting unit and a releasing unit arranged in the IMS access device/border device, wherein: A receiving unit, configured to receive a media copy instruction or a media copy cancellation instruction; A reporting unit, configured to report the communication content of the monitored call to the LIC in real time when the receiving unit receives the media copy instruction; The releasing unit is configured to stop the reporting unit from reporting the communication content of the monitored call when the receiving unit receives the media copy cancel instruction, and release the resources established for transmitting the communication content of the monitored call.

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