WO2010063174A1 - 一种ims监听的实现方法、系统及装置 - Google Patents
一种ims监听的实现方法、系统及装置 Download PDFInfo
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- WO2010063174A1 WO2010063174A1 PCT/CN2009/072863 CN2009072863W WO2010063174A1 WO 2010063174 A1 WO2010063174 A1 WO 2010063174A1 CN 2009072863 W CN2009072863 W CN 2009072863W WO 2010063174 A1 WO2010063174 A1 WO 2010063174A1
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- monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/30—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information
- H04L63/306—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information intercepting packet switched data communications, e.g. Web, Internet or IMS communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/765—Media network packet handling intermediate
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method, system, and apparatus for implementing IMS monitoring. Background technique
- the IMS IP Multimedia Subsystem, the Internet Protocol Multimedia Subsystem
- IP Multimedia Subsystem uses the packet domain as the upper layer control signaling and the media transmission bearer channel, and uses the SIP (Session Initial Protocol) as the service control protocol to control the service. Controls are separated to provide rich multimedia services.
- IMS is the target network of the telecom core network, occupying a very important position in the telecommunication network, facilitating the integration of mobile and fixed integration capabilities of multiple access networks, and more and more support from telecom equipment manufacturers and operators.
- the IMS interception means that the media stream of the monitored session is anchored to the media plane network element controlled by the IMS Core (core) through the core network, and the media stream of the monitored session is monitored. .
- the P-CSCF controls the A-BGF (Access Border Gateway) to copy the media stream, thereby The content of the call of the replication session, that is, the monitoring of the IMS user is implemented on the access border gateway.
- the P-CSCF determines whether the session needs to be monitored according to the IMPU information.
- the P-CSCF passes the P-CSCF and the SPDF (Service Policy Decision Function Entity)
- the GQ between the interface, the SPDF and the A-BGF controls the media stream of the A-BGF replication session to the LEMF (Legal Enforcement Moni Tor ing Facility), which is used for setting and maintaining Control all listening events.
- LEMF Legal Enforcement Moni Tor ing Facility
- the embodiment of the invention provides a method, a system and a device for implementing IMS monitoring, so as to monitor an end user in an IMS system.
- an embodiment of the present invention provides an implementation method of IMS monitoring, including:
- the communication content is copied to complete the monitoring of the communication content.
- An embodiment of the present invention further provides an implementation system for IMS monitoring, including:
- a communication content monitoring trigger function CCTF for controlling a session content monitoring copy function CC-I IF to allocate a media anchor point for the communication party, and controlling the CC-I IF copy when the communication party communicates through the media anchor point Communication content to complete monitoring of the communication content;
- the CC-I I F is configured to allocate a media anchor point to the communication party, and copy the communication content when the communication party communicates through the media anchor point.
- An embodiment of the present invention further provides an apparatus for implementing IMS monitoring, including:
- a first control module configured to control a session content monitoring replication function, CC-I I F, assigning a media anchor point to the communication party;
- An embodiment of the present invention further provides an apparatus for implementing IMS monitoring, including: an allocation module, configured to allocate a media anchor point to a communication party;
- a copying module configured to: when the communication party communicates through the media anchor point, copy the communication content to complete IMS monitoring of the communication content.
- the embodiment of the invention has the following advantages:
- the centralized monitoring of the media on the IMS is realized, and the user who accesses the IMS in various ways can be guaranteed.
- the centralized monitoring of the media on the IMS core does not require the access side device, and the extended private interface between the IMS core and the access side device is not required.
- media anchoring to the IMS Core for centralized monitoring of the media, it is ensured that the signaling and media of all the monitored calls pass through the CCTF and the CC-I IF respectively, so that the supplementary service can be monitored and affiliated on the IMS Core.
- the network implements monitoring of roaming users.
- FIG. 1 is a flowchart of a method for implementing IMS monitoring according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart of a method for implementing IMS monitoring according to Embodiment 2 of the present invention
- FIG. 4 is a structural diagram of an implementation system of an IMS monitoring according to Embodiment 4 of the present invention
- FIG. 5 is a structural diagram of an apparatus for implementing IMS monitoring according to Embodiment 5 of the present invention
- FIG. 6 is a structural diagram of an apparatus for implementing IMS monitoring according to Embodiment 6 of the present invention.
- the method for implementing IMS monitoring according to the first embodiment of the present invention includes: Step S101: Allocating a media anchor point for a communication party;
- Step S102 When the communication party communicates through the media anchor point, copy the communication content to complete IMS monitoring of the communication content.
- the communication party is two or more parties of the communication.
- the communication party is described by taking both communication parties as an example.
- the foregoing assigning media anchor points to the communication party includes: controlling the session content monitoring copy function CC-I IF assigns a media anchor point to the communication party; the foregoing copy communication content includes: controlling the CC-I IF to copy the communication content.
- the method includes: receiving media information of the communication party that needs to be monitored sent by the media anchor request message from the IMS network element. After the media anchor point is allocated to the communication party, the method includes: sending, by the media anchor result response message, the result of the media anchor point allocated by the communication party to the IMS network element.
- the IMS network element includes but is not limited to: S-CSCF, AS, MGCF, IBCF, P-CSCF.
- the media anchor request message includes, but is not limited to: an in-call SIP message, an out-of-call message; the anchor result response message includes but is not limited to: an in-call SIP message, an out-of-call message; wherein the out-of-call message includes It is not limited to: an out-of-call message of the S IP protocol or an off-call message of a non-S IP protocol; the out-of-pocket message of the SIP protocol includes but is not limited to an INFO message or a MESSAGE message and a corresponding corresponding message; the call of the non-SIP message External messages include, but are not limited to, Diame ter protocol messages.
- the in-call SIP protocol message This includes, but is not limited to, a message that directly sends a SIP session message as an anchor request message to the CCTF.
- the above communication contents include, but are not limited to, voice call content, fax content, MODEM content, video call content, and data interaction content.
- the method further includes: the CC-IIF transmitting the communication content to the monitoring center; the sending the communication content to the monitoring center includes but is not limited to: the method of copying the communication content on the connection circuit through the narrowband TDM circuit connection
- the communication content is sent to the monitoring center; the communication content is sent to the monitoring center by a narrowband TDM circuit connection to the monitoring center to initiate a narrowband call; and the communication content is copied on the IP connection by the IP connection.
- the monitoring of the communication content can be implemented on the media anchor point, instead of being implemented by the existing media access device, thereby realizing centralized monitoring of the media on the IMS, and ensuring various ways.
- Users accessing the IMS can implement centralized monitoring of the media on the IMS core. There is no requirement for the access device, and no extended private interface between the IMS core and the access device is required.
- CCTF CCTF
- CC-IIF CC-IIF
- the newly implemented modules for media stream monitoring, CCTF and CC-IIF are core network components, which are limited to the internal IMS core, and do not need to adopt an extended private interface between the IMS core and the access side device.
- the signaling and media of the monitored call pass through the CCTF and CC-IIF modules of the IMS Core respectively, it can ensure the monitoring of the roaming user and various supplementary service monitoring in the home network.
- a method for implementing IMS monitoring according to the second embodiment of the present invention includes CSCF, HSS (Home Subscriber Server, Home Subscriber Server, AS (Application Server), and MRFC (Multimedia Resource Control Function) in the IMS network architecture. , multimedia resource control functional entity) and PDF (Policy Decision Function, policy decision function entity).
- CSCF is used to control user registration and session
- HSS is used to centrally manage user subscription data
- AS is used to provide various business logic control functions.
- CSCF is divided into P-CSCF (Proxy-CSCF, Proxy CSCF), I-CSCF
- the P-CSCF is the access point of the UE (User Equipment) accessing the IMS system.
- the S-CSCF is responsible for the registration authentication and session control of the UE in the IMS core network, and performs the IMS user for the calling end and the called end.
- the basic session routing function performs the value-added service triggering and service control interaction to the AS when the conditions are met according to the IMS triggering rules signed by the user.
- the IMS network architecture is divided into an access interconnection layer, a session control layer, and an application layer.
- the access interconnection layer can complete the initiation and termination of SIP sessions of various SIP terminals; implement IP grouping, and perform conversion between bearer types. ; Implement QoS based on business deployment and session layer control
- the session layer can complete the control of the basic session, complete the user registration, control the SIP session, interact with the application server to perform the session in the application service, maintain the management user data, and manage the service QoS policy, and provide the same with all the users.
- PSTN Public Service Telecommunication Network
- PLMN Public Land Mobile Network
- the session layer can complete the control of the basic session, complete the user registration, control the SIP session, interact with the application server to perform the session in the application service, maintain the management user data, and manage the service QoS policy, and provide the same with all the users.
- Business environment can complete the control of the basic session, complete the user registration, control the SIP session, interact with the application server to perform the session in the application service, maintain the management user data, and manage the service QoS policy, and provide the same with all the users.
- SIP is the basic protocol of IMS. It is a protocol under development and continuous research. It is a multimedia communication system framework protocol, and based on text coding, can complete the multimedia session process for establishing, changing or ending multimedia sessions.
- the application layer protocol cooperates with the multimedia streaming protocol to complete session establishment and media negotiation in the IMS.
- the IMS monitors the real The current method is shown in Figure 2, including:
- step S201 a CCTF (Content of Communication Trigger Function) module and a CC-IIF (Content of Communication Interna 1 Intercept Function) module are added to the IMS core.
- CCTF Content of Communication Trigger Function
- CC-IIF Content of Communication Interna 1 Intercept Function
- the CCTF implements a signaling control function for media centralized monitoring on the IMS Core
- the CC-IIF implements a media copy function for media centralized monitoring on the IMS Core
- the CCTF can anchor the media of the monitored session to the IMS core.
- the CC-IIF can copy the media stream of the monitored session to the LIG (Lawful Intercept Gateway).
- step S202 when the session is established in the IMS system, the session is initialized to the two parties before the session is established, that is, the media information of the user is obtained through the SIP message.
- the media information includes but is not limited to SDP (Session Description Protocol) address information and interception object information.
- step S203 the monitoring target is set to the IMS network element, and when the session request is routed to the IMS network element of the monitoring target home network, the IMS network element determines that the current session needs to be monitored, and monitors the media negotiation process of the monitored session.
- the IMS network element includes, but is not limited to, an S-CSCF, a P-CSCF, an AS, and an MGCF (Media Gateway Control Function).
- the IMS network element takes the S-CSCF as an example.
- Step S204 The S-CSCF sends the SDP address information and the interception object information of the media negotiation operation to the CCTF.
- the acquired SDP address information and the interception object information will pass through the S-CSCF of the user home domain, and when the SDP address information and the interception object information pass through the S-CSCF, the S-CSCF is anchored by the media.
- the request message sends the SDP address information and the interception object information to the CCTF.
- the media anchor request message includes but is not limited to: a SIP message within the call and a message outside the call.
- SIP messages within the call include, but are not limited to, Invite messages within the call, Reinvite message, 18 x message, 2 ⁇ ; message; the out-of-call message includes but is not limited to an out-of-call SIP INFO message, a SIP MESSAGE message, and the out-of-office INFO message or MESSAGE message is a SIP message based on SIP protocol, the call
- the external message may also be an off-call message of a non-SIP message, and the out-of-pocket message of the non-SIP message includes but is not limited to a Diameter, such as an AAR (AA-Request, AA Request) message which may be a Diameter (Next Generation AAA Protocol Standard).
- the AAA (AA_Answer, AA response) message of the Diameter, and the message of realizing the SDP information, the user information required for the monitoring, the operation instruction information, and the like by using the Diameter extension AVP (Attribute-Length-Value, the attribute value in the Diameter's basic protocol) .
- the SDP address information is the address information of the communication party, and the communication party communicates through the SDP address information, and the information of the interception object includes, but is not limited to, user information required for monitoring, operation indication information, and address information of both parties of the call.
- the above SDP address information and the interception object information may be stored in the extended header field of the INFO or MESSAGE message, or may be packed into an XML (eXtensible Markup Language) format and filled into the SIP body (internal).
- the CCTF is a functional module for IMS to implement media monitoring. It can be a single network element, or it can coexist on the MGCF (Media Gateway Control Function) or coexist on the S-CSCF.
- the foregoing off-call message is a message that is not restricted by the INVI TE request and the response path.
- a dialog is created between the INVITE request and the corresponding 200 response (or 101 - 199 temporary response) with a To-Tag, which is an end-to-end SIP between two users for a certain period of time. relationship.
- the intra-session message needs to be transmitted according to the path established between the INVITE request and the corresponding 200 response with the To-Tag.
- the routing path is subject to the conversation. Restrictions, and rules carried within the header field of messages within a session also need to comply with the conversation.
- the outbound message is not restricted by the above path and the carrying rule in the header field.
- the outbound message can be used to establish a path between the INVITE request and the corresponding 200 response with the To-Tag. Any S-CSCF that anchors the SDP address information of both communicating parties to the CCTF.
- Step S205 Allocating a monitored SDP address endpoint to both parties of the session.
- the SDP media format of the allocated SDP address endpoint is the same as the media format of the SDP address information sent by the S-CSCF.
- the main body of the SDP address endpoint that is allocated to the two sides of the session may be the SDP address endpoint that the CCTF allocates for the two parties to the session, or the CCDF control CC-IIF to allocate the intercepted SDP address endpoint to the session.
- the CCTF is used.
- the CC-IIF is configured as an example for allocating the SDP address endpoints to be monitored by the two parties.
- Step S206 the CCTF returns the SDP address endpoint information to the S-CSCF as an anchor result.
- Step S207 The S-CSCF replaces the original SDP address according to the newly allocated SDP address endpoint, and completes the preparation for monitoring.
- the SDP address endpoint is the endpoint information used by the CCTF to interact with the session.
- the SDP endpoint of the user is A
- the SDP endpoint of the B user is B.
- the IMS network element can notify the user B of the SDP address information (address information endpoint A) of the user, and also the SDP address information of the user B (the address information endpoint)
- the IMS network element notifies the CCTF of the SDP address information of the user by using the media anchor request message, and the CCTF controls the CC-IIF to assign the SDP address endpoint to the user. That is, the SDP address information (address information endpoint) assigned to the user session
- the CCTF also needs to control the CC-IIF to assign the SDP address endpoint to the B user, that is, assign the SDP address information (address information endpoint D) to the B user session with the B user, and the CC-IIF needs to be the endpoint.
- C and endpoint D establish a call connection.
- the endpoint A of the user performs voice (or data) packet exchange with the endpoint C according to the SDP address information
- the endpoint B of the user B performs voice with the endpoint D according to the SDP address information.
- Step S208 after the session in the IMS is successfully established, the conversation is performed by both parties (or Data)
- the packet exchange is to pass through the SDP address endpoint assigned by the CCTF.
- media copying is performed, and the content of the call is transmitted to the monitoring center.
- the media copying entity may perform media copying for the CCTF or media copying for the CCTF control CC-I IF.
- the CCTF control CC-I IF performs media copying as an example.
- the SDP address information in the media negotiation operation of the session through the S-CSCF is replaced with the SDP address information of the media endpoint applied on the CC-I IF.
- the calling user will regard the CC-I IF as the called party of this session, and the called user will regard CC-I I F as the calling party of this session.
- all session media streams are established through the CC-I IF.
- the CCTF controls the CC-I IF to realize the connection of the main called media stream, and simultaneously copies the media stream to the LIG or LEMF to implement monitoring of the media stream.
- the method of copying the media stream to the LI G or the LEMF may be performed in different manners according to the requirements of the monitoring center, including but not limited to, transmitting the communication content to the monitoring center by directly copying the communication content on the connection circuit through the narrow-band circuit connection;
- the circuit connection sends the communication content to the monitoring center by means of a narrowband call to the monitoring center;
- the communication content is sent to the monitoring center by copying the communication content directly on the IP connection through the IP connection;
- the SIP call is initiated on the IP connection through the IP connection.
- the CCTF only needs to control the interception gateway to change the original call address information to the fax address information. Then the S-CSCF can continue to anchor the media negotiation to the CCTF using the media anchor request message, and the CCTF controls the CC-I IF to complete the media copy.
- the monitoring method is applicable not only to the monitoring of the session, but also to monitoring various communication contents such as fax content, MODEM content, video call content, and data interactive content according to the monitoring method, as long as the call between the users In the IMS domain, the communication is performed through the negotiated media, and the monitoring can be implemented according to the method in this embodiment.
- the call signaling and the media stream do not pass through the P-CSCF and the A-BGF where the original called user is located, and the A-BGF is controlled by the P-CSCF to which the monitored user belongs.
- the media can not monitor the supplementary service if it is monitored.
- Embodiment of the present invention The provided monitoring method can also be applied to the monitoring of various supplementary services. For example, in the CFU ing Un ing Uncondition, the business party can sign the CFU service, for example, the contracted CFU service. Go to C for the call.
- the calling party dials the service party B, then the S-CSCF of the B triggers the call to the AS of the B, the AS initiates a new SIP call to C, and C accepts the call, and B does not participate in the call, and finally let ⁇ C two-party calls.
- the S-CSCF of the B initiates anchoring to the CCTF before triggering the call to the AS, and the anchor of the AS initiates the call to C no longer initiates anchoring.
- all SDP interactions can pass through the CCTF, and the CCTF controls the CC-I IF to assign SDP address endpoints to the two parties respectively.
- the CCTF controls the CC-I IF to allocate the SDP address endpoints respectively to the two parties and allocates the SDP address endpoints in step S204. The process is the same and will not be repeated here.
- the voice (or data) interaction of both parties of the call passes through the SDP address endpoint on the CCTF.
- the CCTF can control the interception gateway to perform media copying and deliver the content of the call to the monitoring center.
- the above supplementary services include, but are not limited to, unconditional forward, busy forward, no answer forward, call waiting, conference call join, and fork shift.
- the monitoring of the communication content can be implemented on the media anchor point instead of having to be implemented by the existing media access device, thereby realizing the centralized monitoring of the media on the IMS.
- the media can be centrally monitored on the IMS, and users who access the IMS in various ways can implement centralized monitoring of the media on the IMS core.
- the newly added module CCTF and CC-I IF for implementing media stream monitoring are core network components, which belong to the IMS core to implement legal monitoring, and ensure that the adopted private interface is only inside the IMS core, and does not need to be connected in the IMS core.
- An extended private interface is used between the ingress devices. It also enables monitoring of supplementary services.
- a method for implementing IMS monitoring is provided.
- the calling user A is used as the monitoring target, and the S-CSCF and the CCTF use the out-of-session Info message to exchange SDP information.
- the S-CSCF and the P-CSCF are both the S-CSCF and the P-CSCF of the user A's home.
- the CCTF and the CC-I IF use the H.248 message as an example to illustrate the basic call listening process. As shown in Figure 3, it includes:
- Step S301 the user A sends a session request message to the P-CSCF to which the user A belongs, and the message carries the SDP address information of the user A.
- Step S302 The P-CSCF to which the user A belongs forwards the session request message to the S-CSCF to which the user A belongs, and the message carries the SDP address information of the user A.
- Step S303 The S-CSCF sends the SDP address information of the user A to the CCTF by using an Info message outside the session.
- Step S304 the CCTF sends a request message to the CC-IIF for the SDP endpoint of the media anchor point.
- Step S305 the CC-IIF returns a response message to the CCTF, where the message carries the address information of the SDP endpoint of the media anchor point allocated for the user A.
- Step S306 the CCTF sends the SDP endpoint information allocated by the CC-IIF to the user A to the S-CSCF through the 200 message.
- Step S307 The S-CSCF sends a session request message to the AS, where the message carries the SDP endpoint information allocated by the CC-IIF to the user A.
- Step S 308 The AS returns a session request message to the S-CSCF, where the message may carry the SDP endpoint information that the CC-11F allocates to the user A.
- the AS does not process the session request message.
- the session request message of the AS does not change.
- Step S309 The S-CSCF sends a session request message to the user B, where the message carries the SDP endpoint information allocated by the CC-IIF to the user A.
- Step S310 the user B returns a 183 temporary response message to the S-CSCF, where the message carries the SDP address information of the user B.
- Step S 311 The S-CSCF sends a 183 temporary response message to the AS, where the message carries the SDP address information of the user B.
- step S312 the AS returns a 183 temporary response message to the S-CSCF.
- the message may carry the SDP address information of the user B.
- the AS does not have the above-mentioned 183.
- the temporary response message is processed, that is, the 183 temporary response message passing through the AS does not change.
- Step S313 the S-CSCF sends the SDP address information of the user B to the CCTF by using an Info message outside the session.
- Step S314 the CCTF sends a request message for requesting the SDP endpoint to the CC-IIF.
- Step S315 The CC-IIF returns a response message to the CCTF, where the message carries the address information of the SDP endpoint allocated for the user B.
- Step S316 the CCTF sends the SDP endpoint information allocated by the CC-IIF to the user B to the S-CSCF through the 200 message.
- Step S317 The S-CSCF sends a 183 temporary response message to the P-CSCF, where the message carries the address information of the SDP endpoint allocated by the CC-IIF to the user B.
- Step S318 The P-CSCF sends a 183 temporary response message to the user A, where the message carries the address information of the SDP endpoint allocated by the CC-IIF to the user B.
- Step S319 User A sends a request message for creating a dialog 200 to User B.
- Step S320 the user B sends a 200 session request message to the S-CSCF.
- Step S321 The S-CSCF sends a 200 session request message to the AS.
- Step S322 the AS returns a 200 session request message to the S-CSCF.
- Step S323 the S-CSCF sends the information about starting the media copy to the CCTF through the Info message outside the session.
- Step S324 the CCTF sends a request message for media copy to the CC-IIF.
- Step S325 the CC-IIF copies the media, and sends the copied content to the LIG or the LEMF.
- Step S326 the CC-IIF returns a message that the media has been copied to the CCTF.
- Step S327 the CCTF sends a 200 message to the S-CSCF.
- Step S328 the S-CSCF sends a 200 request message to the P-CSCF.
- Step S329 the P-CSCF sends a 200 request message to User A.
- Step S330 user A sends a response message to user B.
- step S331 the user A sends an end message to the P-CSCF.
- step S332 The P-CSCF sends an end message to the S-CSCF.
- Step S 333 The S-CSCF sends an end message to the AS.
- Step S334 The AS sends an end message to the S-CSCF.
- Step S 335 the S-CSCF sends an end message to the user B.
- step S3366 user B sends a 200 end response to user A.
- the monitoring of the communication content can be implemented on the media anchor point instead of having to be implemented by the existing media access device, thereby realizing the centralized monitoring of the media on the IMS.
- the media can be centrally monitored on the IMS, and users who access the IMS in various ways can implement centralized monitoring of the media on the IMS core.
- the newly added modules CCTF and CC-I IF for implementing media stream monitoring are core network components, which belong to the IMS core to implement lawful interception, and ensure that the adopted private interface is only inside the IMS core, and does not need to be connected in the IMS core.
- An extended private interface is used between the ingress devices.
- the media monitoring of the supplementary service can also be implemented when the supplementary service occurs. All services of the IMS are triggered in the centralized S-CSCF of the home network, ensuring that all users can monitor the media stream in the home network.
- the access control of the user is implemented by the P-CSCF of the roaming network, instead of the P-CSCF of the home network, so that the user roaming to other networks cannot be performed in the home network.
- Media monitoring In the embodiment of the present invention, the monitoring of the communication content can be implemented on the media anchor point, so that the user who roams to other networks can also perform media monitoring.
- the system for implementing IMS monitoring includes: an IMS network element 41, configured to send the media information of the anchored communication party to the CCTF 42 by using a media anchor request message.
- the IMS network element 41 includes, but is not limited to, a serving call session control function S-CSCF; an application server AS; a media gateway control function MGCF; a proxy call session control function P-CSCF.
- CCTF 42 for controlling CC-I IF 43 to allocate media anchor points to the communicating party, and in the pass When the media anchors the point communication through the medium, the CC-I IF 43 is controlled to copy the communication content to complete the IMS monitoring of the communication content;
- CC-I I F 43 is used to allocate media anchor point information to the communication party, and copy the communication content when the communication party communicates through the media anchor point.
- the CCTF module and the CC-I IF module are added to the IMS core to implement centralized monitoring of the media on the IMS, and users who access the IMS in various ways can implement the media on the IMS core.
- Centralized monitoring there is no requirement for the access side device.
- the newly implemented module for media stream monitoring, CCTF and CC-I IF is a core network component and belongs to the IMS core to implement lawful interception. It does not need to use an extended private interface between the IMS core and the access side device.
- An apparatus for implementing IMS monitoring according to Embodiment 5 of the present invention is a CCTF. As shown in FIG. 5, the method includes:
- the receiving module 51 is configured to receive media information of the communication party that needs to be monitored, which is sent by the media anchor request message from the IMS network element.
- the first control module 52 is configured to control, according to the media information received by the receiving module 51, the CC-I IF to allocate a media anchor point for the communication party;
- the second control module 53 is configured to control the CC-I IF to copy the communication content when the communication party controls the CC-I IF to allocate the media anchor point to the communication party by using the first control module 52 to complete the IMS of the communication content. monitor.
- the CCTF module and the CC-I IF module are added to the IMS core to implement centralized monitoring of the media on the IMS, and users who access the IMS in various ways can implement the media on the IMS core.
- Centralized monitoring there is no requirement for the access side device.
- the newly implemented module for media stream monitoring, CCTF and CC-I IF is a core network component and belongs to the IMS core to implement lawful interception. It does not need to use an extended private interface between the IMS core and the access side device.
- the device is CC-I IF , As shown in Figure 6, it includes:
- An allocation module 61 configured to allocate a media anchor point to the communication party
- the copying module 62 is configured to: when the communication party communicates through the media anchor point allocated by the distribution module 61, copy the communication content to complete the monitoring of the communication content.
- the sending module 63 is configured to send the communication content copied by the copying module 62 to the monitoring center, where the monitoring center includes but is not limited to LI G or LEMF.
- Sending the communication content to the monitoring center includes but is not limited to: transmitting the communication content to the monitoring center by directly copying the communication content on the connection circuit through the narrow-band circuit connection; transmitting the communication content by sending a narrow-band call to the monitoring center through the narrow-band circuit connection To the monitoring center; send the communication content to the monitoring center by copying the communication content directly on the IP connection through the IP connection; send the communication content to the monitoring center by means of the IP connection to initiate the SIP call on the IP connection.
- the CCTF module and the CC-I IF module are added to the IMS core to implement centralized monitoring of the media on the IMS, and users who access the IMS in various ways can implement the media on the IMS core.
- the newly implemented module for media stream monitoring, CCTF and CC-I IF is a core network component, and is a supporting component for the IMS core to implement lawful interception, and does not need to adopt an extended private interface between the IMS core and the access side device.
- the media monitoring of the supplementary service can also be implemented when the supplementary service occurs.
- All services of the IMS are triggered in the centralized S-CSCF of the home network, ensuring that all users monitor the media stream in the home network. Moreover, by enabling the monitoring of the communication content to be implemented on the media anchor point, the user who is roaming to other networks can also perform media monitoring.
- the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
- the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several Command to make a computer device (can be a personal meter)
- a computer, server, or network device, etc. performs the methods described in various embodiments of the present invention.
- the above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. The scope of protection of the invention should be considered.
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Description
一种 IMS监听的实现方法、 系统及装置 技术领域
本发明涉及通信技术领域, 特别是涉及一种 IMS监听的实现方法、 系 统及装置。 背景技术
IMS ( IP Multimedia Subsystem, 网际协议多媒体子系统)通过采用 分组域为上层控制信令和媒体传输承载通道, 并将 SIP ( Session Initial Protocol, 会话初始协议)作为业务的控制协议, 将业务控制与承载控制 进行分离从而提供丰富的多媒体业务。 IMS是电信核心网的目标网络, 在 电信网中占据十分重要的位置, 方便的融合移动和固定多种接入网络的集 成能力, 越来越多的获得电信设备制造商和运营商的支持。
合法监听为国家安全机构在法律的授权下, 在通讯设备上设置特定的 监听目标, 并将特定的监听目标的会话事件信息和通讯内容通过专门的接 口送到安全机构指定的监听中心。 监听中心根据这些信息可以复原被监听 目标的通讯事件和通讯内容, 达到监听的目的。 在 IMS网络中也应该实现 合法监听, IMS监听是指通过核心网将被监听会话的媒体流锚定到 IMS Core (核心)控制的媒体面网元上, 并对被监听会话的媒体流实施监听。
现有技术中, 通过在 CSCF (Call Session Control Function, 呼叫 会话控制功能实体) 上确定会话的监听方式, 由 P-CSCF (代理 CSCF)控 制 A-BGF (接入边界网关)复制媒体流, 从而复制会话的通话内容, 即 IMS 用户的监听是在接入边界网关上实现的。 P-CSCF在得到通过该 P-CSCF接 入到 IMS域的用户的 IMPU ( IP Multimedia Public Identity, IMS共有 用户标识)信息时, 根据 IMPU信息判断会话是否需要被监听。 当该用户 需要监听时, P-CSCF通过该 P-CSCF与 SPDF (服务策略判决功能实体)之
间的 Gq, 接口、 SPDF和 A-BGF之间的 l a接口控制 A-BGF复制会话的媒体 流到 LEMF ( Law Enforcement Moni tor ing Fac i l i ty , 合法监听设备) 上, 该 LEMF用于设置、 维护、 控制所有监听事件。
在实现本发明过程中, 发明人发现现有技术中至少存在如下问题: 现有技术中需要通过 P-CSCF和 SPDF之间的接口、 SPDF和 A-BGF之间 的接口完成监听过程,而上述的接口并没有统一的标准,在对接时很困难。 发明内容
本发明实施例提供一种 IMS监听的实现方法、 系统及装置, 以在 IMS 系统中对终端用户进行监听。
为了达到上述目的, 本发明实施例提出了一种 IMS监听的实现方法, 包括:
为通讯方分配媒体锚定点;
在所述通讯方通过所述媒体锚定点通讯时, 复制通讯内容, 以完成对 所述通讯内容的监听。
本发明实施例还提出了一种 IMS监听的实现系统, 包括:
通讯内容监听触发功能 CCTF ,用于控制会话内容监听复制功能 CC-I I F 为通讯方分配媒体锚定点, 并在所述通讯方通过所述媒体锚定点通讯时, 控制所述 CC-I IF复制通讯内容, 以完成对所述通讯内容的监听;
CC-I I F , 用于为通讯方分配媒体锚定点, 并在所述通讯方通过所述媒 体锚定点通讯时复制通讯内容。
本发明实施例还提出了一种 IMS监听的实现装置, 包括:
第一控制模块, 用于控制会话内容监听复制功能 CC-I I F为通讯方分 配媒体锚定点;
第二控制模块, 用于在所述通讯方通过所述媒体锚定点通讯时, 控制 所述 CC-I I F复制通讯内容, 以完成对所述通讯内容的 IMS监听。
本发明实施例还提出了一种 IMS监听的实现装置, 包括: 分配模块, 用于为通讯方分配媒体锚定点;
复制模块, 用于在所述通讯方通过所述媒体锚定点通讯时, 复制通讯 内容, 以完成对所述通讯内容的 IMS监听。
与现有技术相比, 本发明实施例具有以下优点:
通过使对通讯内容的监听可以在媒体锚定点上实现, 而不是必须由现 有媒体接入设备实现, 从而实现了媒体在 IMS上的集中监听, 保证采用各 种方式接入 IMS的用户都可以在 IMS core上实现媒体的集中监听, 对接 入侧设备没有要求, 而且不需要在 IMS core和接入侧设备之间采用扩展 的私有接口。 而且, 通过媒体锚定到 IMS Core上实现媒体的集中监听, 可以保证所有被监听呼叫的信令和媒体分别经过 CCTF和 CC-I IF , 可以实 现在 IMS Core上对补充业务的监听以及在归属网络实现对漫游用户的监 听。 附图说明 实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员 来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的 附图。
图 1为本发明实施例一提出的一种 IMS监听的实现方法流程图; 图 2为本发明实施例二提出的一种 IMS监听的实现方法流程图; 图 3为本发明实施例三提出的一种 IMS监听的实现方法流程图; 图 4为本发明实施例四提出的一种 IMS监听的实现系统结构图; 图 5为本发明实施例五提出的一种 IMS监听的实现装置结构图; 图 6为本发明实施例六提出的一种 IMS监听的实现装置结构图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进 行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没 有做出创造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的 范围。
本发明实施例一提出的一种 IMS监听的实现方法,如图 1所示, 包括: 步骤 S101 , 为通讯方分配媒体锚定点;
步骤 S102 ,在所述通讯方通过所述媒体锚定点通讯时,复制通讯内容, 以完成对所述通讯内容的 IMS监听。
具体的, 本实施例中, 该通讯方为通讯的双方或多方, 在本发明的所 有实施例中, 该通讯方均以通讯双方为例说明。
其中, 上述的为通讯方分配媒体锚定点包括: 控制会话内容监听复制 功能 CC-I IF为通讯方分配媒体锚定点; 上述的复制通讯内容包括: 控制 该 CC-I IF复制该通讯内容。
在上述为通讯方分配媒体锚定点之前包括: 接收来自 IMS网元的通过 媒体锚定请求消息发送的需要监听的通讯方的媒体信息。 在上述为通讯方 分配媒体锚定点之后包括: 通过媒体锚定结果响应消息将为通讯方分配的 媒体锚定点的结果发送给 IMS 网元。 其中, 该 IMS 网元包括但不限于: S-CSCF、 AS、 MGCF、 IBCF、 P-CSCF。 该媒体锚定请求消息包括但不限于: 呼叫内 S IP消息、 呼叫外消息; 该锚定结果响应消息包括但不限于: 呼叫 内 S IP消息、 呼叫外消息; 其中, 该呼叫外消息包括但不限于: S IP协议 的呼叫外消息或非 S IP协议的呼叫外消息; 该 S IP协议的呼叫外消息包括 但不限于 INFO消息或 MESSAGE消息以及对应的相应消息; 该非 S IP消息 的呼叫外消息包括但不限于 D i a me t e r协议消息。 该呼叫内 S IP协议消息
包括但不限于直接将 SIP会话消息作为锚定请求消息发给 CCTF的消息。 此外 ,上述的通讯内容包括但不限于:语音通话内容、传真内容、 MODEM 内容、视频通话内容、数据交互内容。在上述的复制通讯内容之后还包括: CC-IIF将通讯内容发送给监听中心;该将通讯内容发送给监听中心包括但 不限于: 通过窄带 TDM电路连接在连接电路上复制该通讯内容的方式将该 通讯内容发送给该监听中心; 通过窄带 TDM电路连接向监听中心发起窄 带呼叫的方式将该通讯内容发送给该监听中心; 通过 IP连接在该 IP连接 上复制该通讯内容的方式将该通讯内容发送给该监听中心; 通过 IP连接 在该 I P连接上发起呼叫的方式将该通讯内容发送给该监听中心。
可见, 本实施例中, 通过使对通讯内容的监听可以在媒体锚定点上实 现, 而不是必须由现有媒体接入设备实现, 从而实现了媒体在 IMS上的集 中监听, 保证采用各种方式接入 IMS的用户都可以在 IMS core上实现媒 体的集中监听, 对接入侧设备没有要求, 而且不需要在 IMS core和接入 侧设备之间采用扩展的私有接口。
进一步地, 通过在 IMS core上增加 CCTF模块和 CC-IIF模块, 实现 媒体在 IMS上的集中监听,保证采用各种方式接入 IMS的用户都可以在 IMS core上实现媒体的集中监听。 而且新增的实现媒体流监听的模块 CCTF、 CC-IIF是核心网部件, 只局限在 IMS core内部, 不需要在 IMS core和接 入侧设备之间采用扩展的私有接口。
同时, 由于被监听呼叫的信令和媒体都分别经过 IMS Core的 CCTF和 CC-IIF模块,可以保证在归属网络实现漫游用户的监听以及各种补充业务 监听。
本发明实施例二提出的一种 IMS监听的实现方法,在 IMS网络架构中, 包括 CSCF、 HSS ( Home Subscriber Server, 归属用户服务器) 、 AS (Application Server,应用服务器 )、MRFC( Multimedia Resource Control Function, 多媒体资源控制功能实体) 以及 PDF ( Policy Decision
Function, 策略判决功能实体) 。 上述的 CSCF用于控制用户的注册和会 话, HSS用于集中管理用户签约数据, AS用于提供各种业务逻辑控制功能。 其中, CSCF分为 P-CSCF ( Proxy-CSCF, 代理 CSCF ) , I-CSCF
( Interrogating-CSCF,查询 CSCF ), S-CSCF( Serving-CSCF,服务 CSCF ), 上述的 P-CSCF、 I-CSCF和 S-CSCF在物理上可以合在一起形成功能模块, 也可以分开分别为不同的功能模块, 用户通过归属网络的 P-CSCF接入到 IMS; 归属网络的 S-CSCF完成会话和业务的触发控制、 以及与 AS的业务 控制交互; I-CSCF则用于路由的查询。 P-CSCF是 UE ( User Equipment, 用户设备)接入 IMS系统的入口, S-CSCF在 IMS核心网中负责对 UE的注 册鉴权和会话控制, 执行针对主叫端及被叫端 IMS用户的基本会话路由功 能, 并根据用户签约的 IMS触发规则, 在条件满足时进行到 AS的增值业 务触发及业务控制交互。
IMS网络架构分为接入互联层、 会话控制层和应用层, 其中, 接入互 联层可以完成各类 SIP终端的 SIP会话的发起和终结; 实现 IP的分组, 并进行承载类型之间的转换; 根据业务部署和会话层的控制实现 QoS
( Quality of Service, 服务质量) 策略; 完成与 PSTN ( Publ ic Service Telecommunication Network, 传统公共服务电信网 ) / PLMN ( Public Land Mobile Network, 公共陆地移动通信网) 间的互联互通, 该接入互联层包 括但不限于各类 SIP终端、 有线接入、 无线接入、 互联互通网关等设备。 会话层可以完成基本会话的控制, 完成用户注册、 SIP会话路由控制, 与 应用服务器交互执行应用业务中的会话、维护管理用户数据、管理业务 QoS 策略等功能, 与应用层一起为所有用户提供一致的业务环境。
在 IMS系统中, SIP是 IMS的基本协议, 为正在发展和不断研究中的 协议, 是多媒体通信系统框架协议, 并且基于文本编码, 可以完成多媒体 的会话过程, 用于建立、 改变或者结束多媒体会话的应用层协议, 与多媒 体流协议配合, 共同完成 IMS中的会话建立及媒体协商。 该 IMS监听的实
现方法如图 2所示, 包括:
步骤 S201, 在 IMS core上增加 CCTF ( Content of Communication Trigger Function, 通讯内容监听触发功能)模块和 CC-IIF ( Content of communication Interna 1 Intercept Function, 会话内容监听角虫发功能) 模块。
具体的, 该 CCTF实现在 IMS Core上媒体集中监听的信令控制功能, 该 CC-IIF实现在 IMS Core上媒体集中监听的媒体复制功能, 该 CCTF可 以将被监听会话的媒体锚定到 IMS core的 CC-IIF上, 该 CC-IIF可以复 制被监听会话的媒体流到 LIG ( Lawful Intercept Gateway, 合法监听网 关) 上。
步骤 S202, 在 IMS系统内建立会话时, 需在建立会话之前, 对会话双 方进行会话的初始化, 即通过 SIP消息获取用户的媒体信息。 该媒体信息 包括但不限于 SDP ( Session Description Protocol, 会话描述协议) 地 址信息和监听对象信息。
步骤 S203, 将监听目标设置到 IMS网元上, 会话请求路由到监听目标 归属网络的 IMS网元时, IMS网元判断出本次会话需要被监听, 将监控被 监听会话的媒体协商过程。
具体的, 该 IMS网元包括但不限于 S-CSCF、 P-CSCF、 AS、 MGCF (媒体 网关控制功能) , 本实施例中, 该 IMS网元以 S-CSCF为例。
步骤 S204, S-CSCF将媒体协商操作的 SDP地址信息和监听对象信息 发送给 CCTF。
具体的, 在初始化的时候, 上述获取的 SDP地址信息和监听对象信息 将经过用户归属域的 S-CSCF,当 SDP地址信息和监听对象信息经过 S-CSCF 时, 该 S-CSCF通过媒体锚定请求消息将 SDP地址信息和监听对象信息发 送给 CCTF。 该媒体锚定请求消息包括但不限于: 呼叫内的 SIP消息和呼叫 外的消息。 该呼叫内的 SIP消息包括但不限于呼叫内的 Invite消息、
reinvite消息、 18 x消息、 2 χ χ消息; 该呼叫外消息包括但不限于呼叫 外 SIP INFO消息、 SIP MESSAGE消息, 该呼叫外 INFO消息或 MESSAGE消 息是基于 SIP协议的一种 SIP消息、 该呼叫外消息还可以为非 SIP消息的 呼叫外消息, 该非 SIP消息的呼叫外消息包括但不限于 Diameter, 比如可 以是 Diameter (下一代的 AAA协议标准 ) 的 AAR ( AA-Request, AA请求 ) 消息和 Diameter 的 AAA ( AA_Answer , AA应答)消息、 以及通过 Diameter 扩展 AVP (Attribute-Length- Value, Diameter的基础协议中的属性值) 实现 SDP信息、 监听需要的用户信息、 操作指示信息等内容的消息。 上述 的 SDP地址信息为通讯方的地址信息, 通讯方通过该 SDP地址信息进行通 讯,该监听对象的信息包括但不限于监听需要的用户信息、操作指示信息、 通话双方的地址信息。 上述的 SDP地址信息和监听对象信息可以存放在 INFO或 MESSAGE消息的扩展头域中,也可以打包成 XML( eXtens ible Markup Language, 可扩展标记语言)格式填充到 SIP body (内部) 。 该 CCTF是 IMS实现媒体监听的一个功能模块, 可以是一个单独的网元, 也可以共存 于 MGCF (媒体网关控制功能) 上或共存于 S-CSCF上。 本实施例中, 上述 的呼叫外消息为不受 I N V I TE请求和响应路径限制的消息。 例如, INVITE 请求及相应的带有 To-Tag的 200响应 (或 101 - 199临时响应)之间会创 建对话 (Dialog) , 该对话是一个持续一定时间的两个用户之间的端到 端的 SIP关系。 当使用会话内消息时, 该会话内消息需要按照该 INVITE 请求与相应的带有 To-Tag的 200响应之间建立的路径进行传输, 在对话 中的 SIP请求和响应, 路由路径会受到对话的限制, 而且会话内消息的头 域内携带的规则也需要遵从该对话。 而呼叫外消息则不会受到上述路径和 头域内携带规则的限制, 本实施例中, 通过使用该呼叫外消息可以从 INVITE请求与相应的带有 To-Tag的 200响应之间建立的路径上的任意 S-CSCF, 将通讯双方的 SDP地址信息锚定给 CCTF。
步骤 S205, 为会话双方分配监听的 SDP地址端点。
具体的,该分配的 SDP地址端点的 SDP媒体格式与 S-CSCF发送的 SDP 地址信息的媒体格式相同。 该为会话双方分配监听的 SDP地址端点的主体 可以为 CCTF为会话双方分配监听的 SDP地址端点, 也可以为 CCTF控制 CC-IIF为会话双方分配监听的 SDP地址端点, 本实施例中, 以 CCTF控制 CC-IIF为会话双方分配监听的 SDP地址端点为例进行说明。
步骤 S206, CCTF将 SDP地址端点信息作为锚定结果返回给 S-CSCF。 步骤 S207, S-CSCF根据新分配的 SDP地址端点替换原有的 SDP地址, 完成监听的准备工作。
具体的, 上述 SDP地址端点为 CCTF与会话双方分别交互时所使用的 端点信息, 例如, 有曱乙两个用户, 曱用户的 SDP端点为 A, 乙用户的 SDP 端点为 B, 在初始化阶段, IMS网元可以将曱用户的 SDP地址信息 (地址 信息端点 A) 通知乙用户, 也会将乙用户的 SDP地址信息 (地址信息端点
B) 通知曱用户, 在曱乙双方会话时, 曱用户和乙用户根据双方的 SDP信 息直接进行会话, 即根据原有的 SDP地址进行会话。 当需要对曱乙双方的 会话进行监听时, 在初始化阶段, IMS网元通过使用媒体锚定请求消息将 曱用户的 SDP地址信息通知 CCTF, 该 CCTF控制 CC-IIF为曱用户分配 SDP 地址端点, 即为曱用户分配与曱用户会话的 SDP地址信息(地址信息端点
C) , 同样的, 该 CCTF还需控制 CC-IIF为乙用户分配 SDP地址端点, 即 为乙用户分配与乙用户会话的 SDP地址信息 (地址信息端点 D) , 同时 CC-IIF还需为端点 C和端点 D建立通话连接, 在曱乙双方会话时, 曱用户 的端点 A根据 SDP地址信息与端点 C进行语音(或数据) 包交换, 乙用户 的端点 B根据 SDP地址信息与端点 D进行语音 (或数据 ) 包交换, 而端点 C和端点 D之间是建立了通话连接的, 即在曱用户和乙用户之间建立了会 话, 即使用新分配的 SDP地址端点替换的 SDP地址, 从而完成监听的准备 工作。
步骤 S208, IMS中的会话建立成功后, 会话双方进行会话的语音(或
数据) 包交换要经过 CCTF分配的 SDP地址端点, 此时, 进行媒体复制, 并将通话的内容传递给监听中心。 该进行媒体复制的主体可以为 CCTF进 行媒体复制, 也可以为 CCTF控制 CC-I IF进行媒体复制, 本实施例中, 以 CCTF控制 CC-I I F进行媒体复制为例进行说明。
具体的, 会话经过 S-CSCF的媒体协商操作中的 SDP地址信息被替换 为 CC-I IF上申请的媒体端点的 SDP地址信息。 主叫用户会将 CC-I IF看作 本次会话的被叫, 被叫用户会将 CC-I I F看作本次会话的主叫。 当媒体协 商完成开始建立媒体流时,所有的会话媒体流通过 CC-I IF建立。此时 CCTF 控制 CC-I IF实现主被叫媒体流接续的同时, 复制媒体流到 LIG或 LEMF , 实现媒体流的监听。 复制媒体流到 LI G或 LEMF的方式可以根据监听中心 的要求采用不同的方式, 具体包括但不限于通过窄带电路连接直接在连接 电路上复制通讯内容的方式将通讯内容发送给监听中心; 通过窄带电路 连接向监听中心发起窄带呼叫的方式将通讯内容发送给监听中心;通过 IP 连接直接在 IP连接上复制通讯内容的方式将通讯内容发送给监听中心; 通过 IP连接在 IP连接上发起 S IP呼叫的方式将通讯内容发送给监听中心。
在上述进行会话的过程中, 若通话过程中媒体发生了更新, 例如, 由 通话过程转换成了传真过程, 则 CCTF只需控制监听网关将原来的双方的 通话地址信息改变成传真的地址信息, 则 S-CSCF可以继续使用媒体锚定 请求消息将媒体协商锚定到 CCTF , 由 CCTF控制 CC-I IF完成媒体复制。 在 本发明实施例中, 该监听方法不仅适用于对会话的监听, 还可以根据该监 听方法监听传真内容、 MODEM内容、 视频通话内容、 数据交互内容等各种 通讯内容, 只要用户之间的通话在 IMS域中是通过协商好的媒体进行交流 的, 都可以根据本实施例中的方法实现监听。
现有技术中当 IMS core上发生补充业务时, 呼叫信令和媒体流并不 经过原被叫用户所在的 P-CSCF和 A-BGF , 使用被监听用户所属的 P-CSCF 控制 A-BGF复制媒体进行监听便不能实现补充业务的监听。 本发明实施例
提供的监听方法还可以适用于各种补充业务的监听, 例如, 在 CFU监听 ( Ca l l Forward ing Uncond i t iona l , 无条件呼叫前转) 业务中, 业务方 可以签约 CFU业务, 比如乙签约 CFU业务为呼叫前转到丙。 主叫方曱拨打 业务方乙, 则乙的 S-CSCF将呼叫触发到乙的 AS , AS发起新的 S IP呼叫到 丙, 丙接受曱的呼叫, 而乙并不会参与该通话, 最终让曱丙两方通话。 如 果业务方乙被监听, 则乙的 S-CSCF在触发呼叫到 AS之前向 CCTF发起锚 定, 而 AS发起呼叫到丙的路径上不再发起锚定。 之后所有的 SDP交互都 能够经过 CCTF , 而 CCTF控制 CC-I I F为两方分别分配 SDP地址端点, CCTF 控制 CC-I I F为两方分别分配 SDP地址端点的过程与步骤 S204中分配 SDP 地址端点的过程相同, 在此不再赘述。 会话建立成功后, 通话双方的语音 (或数据 ) 交互都会经过 CCTF上的 SDP地址端点, CCTF可以控制监听网 关进行媒体复制, 并将通话的内容传递给监听中心。 上述的补充业务包括 但不限于无条件前转、 遇忙前转、 无应答前转、 呼叫等待、 会议呼叫加入、 拍叉转移。
可见, 本实施例中, 通过使对通讯内容的监听可以在媒体锚定点上实 现, 而不是必须由现有媒体接入设备实现, 从而实现了媒体在 IMS上的集 中监听。 进一步地, 通过在 IMS core上增加 CCTF模块和 CC-I I F模块, 实现媒体在 IMS上的集中监听, 保证采用各种方式接入 IMS的用户都可以 在 IMS core上实现媒体的集中监听。 而且新增的实现媒体流监听的模块 CCTF , CC-I IF是核心网部件, 属于 IMS core实现合法监听的配套部件, 保证了采用的私有接口只在 IMS core内部, 不需要在 IMS core和接入侧 设备之间采用扩展的私有接口。 而且还可以实现对补充业务的监听。
本发明实施例三提出的一种 IMS监听的实现方法, 在本实施例中, 以 主叫用户 A为监听目标, S-CSCF到 CCTF之间采用会话外的 Info消息交换 SDP信息, 本实施例中, S-CSCF和 P-CSCF均为用户 A归属地的 S-CSCF和 P-CSCF , CCTF和 CC-I IF采用 H. 248消息为例说明基本呼叫的监听流程,
如图 3所示, 包括:
步骤 S301, 用户 A向用户 A所属的 P-CSCF发送会话请求消息, 该消 息中携带了用户 A的 SDP地址信息。
步骤 S302, 用户 A所属的 P-CSCF将会话请求消息转发给用户 A所属 的 S-CSCF, 该消息中携带了用户 A的 SDP地址信息。
步骤 S303, S-CSCF通过会话外的 Info消息将用户 A的 SDP地址信息 发送给 CCTF。
步骤 S304, CCTF向 CC-IIF发送申请媒体锚定点的 SDP端点的请求消 息。
步骤 S305, CC-IIF向 CCTF返回响应消息, 所述消息中携带了为用户 A分配的媒体锚定点的 SDP端点的地址信息。
步骤 S306, CCTF将 CC-IIF为用户 A分配的 SDP端点信息通过 200消 息发送给 S-CSCF。
步骤 S307, S-CSCF向 AS发送会话请求消息, 该消息中携带了 CC-IIF 为用户 A分配的 SDP端点信息。
步骤 S 308 , AS向 S-CSCF返回会话请求消息 ,该消息中可以携带 CC- 11 F 为用户 A分配的 SDP端点信息, 在本实施例中, AS不对上述的会话请求消 息进行处理, 即经过 AS的会话请求消息不会发生变化。
步骤 S309, S-CSCF向用户 B发送会话请求消息, 该消息中携带了 CC-IIF为用户 A分配的 SDP端点信息。
步骤 S310, 用户 B向 S-CSCF返回 183临时响应消息, 该消息中携带 了用户 B的 SDP地址信息。
步骤 S 311 , S-CSCF向 AS发送 183临时响应消息, 该消息中携带了用 户 B的 SDP地址信息。
步骤 S312, AS向 S-CSCF返回 183临时响应消息, 同样的, 该消息中 可以携带了用户 B的 SDP地址信息, 在本实施例中, AS不对上述的 183
临时响应消息进行处理, 即经过 AS的 183临时响应消息不会发生变化。 步骤 S313, S-CSCF通过会话外的 Info消息将用户 B的 SDP地址信息 发送给 CCTF。
步骤 S314, CCTF向 CC-IIF发送申请 SDP端点的请求消息。
步骤 S315, CC-IIF向 CCTF返回响应消息, 所述消息中携带了为用户 B分配的 SDP端点的地址信息。
步骤 S316, CCTF将 CC-IIF为用户 B分配的 SDP端点信息通过 200消 息发送给 S-CSCF。
步骤 S317, S-CSCF向 P-CSCF发送 183临时响应消息, 该消息中携带 了了 CC-IIF为用户 B分配的 SDP端点的地址信息。
步骤 S318, P-CSCF向用户 A发送 183临时响应消息, 该消息中携带 了了 CC-IIF为用户 B分配的 SDP端点的地址信息。
步骤 S319, 用户 A向用户 B发送创建对话的 200请求消息。
步骤 S320, 用户 B向 S-CSCF发送 200会话请求消息。
步骤 S321, S-CSCF向 AS发送 200会话请求消息。
步骤 S322, AS向 S-CSCF返回 200会话请求消息。
步骤 S323, S-CSCF通过会话外的 Info消息将开始媒体复制的信息发 送给 CCTF。
步骤 S324, CCTF向 CC-IIF发送媒体复制的请求消息。
步骤 S325, CC-IIF对媒体复制, 并将复制的内容发送给 LIG或 LEMF。 步骤 S326, CC-IIF向 CCTF返回媒体已复制的消息。
步骤 S327, CCTF向 S - CSCF发送 200消息。
步骤 S328, S-CSCF向 P-CSCF发送 200请求消息。
步骤 S 329, P-CSCF向用户 A发送 200请求消息。
步骤 S330, 用户 A向用户 B发送响应消息。
步骤 S331, 用户 A向 P-CSCF发送结束消息。
步骤 S 332 , P-CSCF向 S-CSCF发送结束消息。
步骤 S 333 , S-CSCF向 AS发送结束消息。
步骤 S 334 , AS向 S-CSCF发送结束消息。
步骤 S 335 , S-CSCF向用户 B发送结束消息。
步骤 S 336 , 用户 B向用户 A发送 200结束响应。
可见, 本实施例中, 通过使对通讯内容的监听可以在媒体锚定点上实 现, 而不是必须由现有媒体接入设备实现, 从而实现了媒体在 IMS上的集 中监听。 进一步地, 通过在 IMS core上增加 CCTF模块和 CC-I I F模块, 实现媒体在 IMS上的集中监听, 保证采用各种方式接入 IMS的用户都可以 在 IMS core上实现媒体的集中监听。 而且新增的实现媒体流监听的模块 CCTF、 CC-I IF是核心网部件, 属于 IMS core实现合法监听的配套部件, 保证了采用的私有接口只在 IMS core内部, 不需要在 IMS core和接入侧 设备之间采用扩展的私有接口。 通过使用 S-CSCF锚定媒体信息给 CCTF , 使得当发生补充业务时, 也可以实现补充业务的媒体监听。 IMS的所有业 务都在归属网络的 S-CSCF集中触发, 保证了所有用户在归属网络集中实 现媒体流的监听。 而且现有技术中当用户漫游到其它网络时, 用户的接入 控制由漫游网络的 P-CSCF实现, 而不是归属网络的 P-CSCF , 这样在归属 网络中无法对漫游到其它网络的用户进行媒体监听。 本发明实施例中, 通 过使对通讯内容的监听可以在媒体锚定点上实现, 从而对漫游到其它网络 的用户也可以进行媒体监听。
本发明实施例四提出的一种 IMS监听的实现系统,如图 4所示, 包括: IMS网元 41 , 用于通过媒体锚定请求消息将锚定的通讯方的媒体信息 发送给 CCTF 42。 该 IMS网元 41包括但不限于服务呼叫会话控制功能 S-CSCF; 应用服务器 AS ; 媒体网关控制功能 MGCF; 代理呼叫会话控制功 能 P-CSCF。
CCTF 42 , 用于控制 CC-I IF 43为通讯方分配媒体锚定点, 并在该通
讯方通过该媒体锚定点通讯时, 控制该 CC-I IF 43复制通讯内容, 以完成 对该通讯内容的 IMS监听;
CC-I I F 43 , 用于为通讯方分配媒体锚定点信息, 并在该通讯方通过 该媒体锚定点通讯时复制通讯内容。
可见, 本实施例中, 通过在 IMS core上增加 CCTF模块和 CC-I IF模 块, 实现媒体在 IMS上的集中监听, 保证采用各种方式接入 IMS的用户都 可以在 IMS core上实现媒体的集中监听, 对接入侧设备没有要求。 而且 新增的实现媒体流监听的模块 CCTF、 CC-I IF是核心网部件,属于 IMS core 实现合法监听的配套部件, 不需要在 IMS core和接入侧设备之间采用扩 展的私有接口。
本发明实施例五提出的一种 IMS监听的实现装置, 该装置为 CCTF , 如 图 5所示, 包括:
接收模块 51 ,用于接收来自 IMS网元的通过媒体锚定请求消息发送的 需要监听的通讯方的媒体信息。
第一控制模块 52 , 用于根据接收模块 51接收的媒体信息控制 CC-I IF 为通讯方分配媒体锚定点;
第二控制模块 53 , 用于在该通讯方通过第一控制模块 52控制 CC-I IF 为通讯方分配媒体锚定点时, 控制该 CC-I IF复制通讯内容, 以完成对该 通讯内容的 IMS监听。
可见, 本实施例中, 通过在 IMS core上增加 CCTF模块和 CC-I IF模 块, 实现媒体在 IMS上的集中监听, 保证采用各种方式接入 IMS的用户都 可以在 IMS core上实现媒体的集中监听, 对接入侧设备没有要求。 而且 新增的实现媒体流监听的模块 CCTF、 CC-I IF是核心网部件,属于 IMS core 实现合法监听的配套部件, 不需要在 IMS core和接入侧设备之间采用扩 展的私有接口。
本发明实施例六提出的一种 IMS监听的实现装置, 该装置为 CC-I IF ,
如图 6所示, 包括:
分配模块 61 , 用于为通讯方分配媒体锚定点;
复制模块 62 , 用于在该通讯方通过分配模块 61分配的媒体锚定点通 讯时, 复制通讯内容, 以完成对所述通讯内容的监听。
发送模块 63 , 用于将复制模块 62复制的通讯内容发送给监听中心, 该监听中心包括但不限于 LI G或 LEMF。将通讯内容发送给监听中心包括但 不限于: 通过窄带电路连接直接在连接电路上复制通讯内容的方式将通讯 内容发送给监听中心; 通过窄带电路连接向监听中心发起窄带呼叫的方 式将通讯内容发送给监听中心; 通过 IP连接直接在 IP连接上复制通讯内 容的方式将通讯内容发送给监听中心; 通过 IP连接在 IP连接上发起 S IP 呼叫的方式将通讯内容发送给监听中心。
可见, 本实施例中, 通过在 IMS core上增加 CCTF模块和 CC-I IF模 块, 实现媒体在 IMS上的集中监听, 保证采用各种方式接入 IMS的用户都 可以在 IMS core上实现媒体的集中监听。 而且新增的实现媒体流监听的 模块 CCTF、 CC-I IF是核心网部件, 属于 IMS core实现合法监听的配套部 件, 不需要在 IMS core和接入侧设备之间采用扩展的私有接口。 通过使 用 IMS网元锚定媒体信息给 CCTF ,使得当发生补充业务时, 也可以实现补 充业务的媒体监听。 IMS的所有业务都在归属网络的 S-CSCF集中触发, 保 证了所有用户在归属网络集中实现媒体流的监听。 而且通过使对通讯内容 的监听可以在媒体锚定点上实现, 从而对漫游到其它网络的用户也可以进 行媒体监听。
通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本 发明可以通过硬件实现, 也可以借助软件加必要的通用硬件平台的方式来 实现。 基于这样的理解, 本发明的技术方案可以以软件产品的形式体现出 来, 该软件产品可以存储在一个非易失性存储介质(可以是 CD-ROM, U盘, 移动硬盘等) 中, 包括若干指令用以使得一台计算机设备(可以是个人计
算机, 服务器, 或者网络设备等)执行本发明各个实施例所述的方法。 以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的 普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进 和润饰, 这些改进和润饰也应视本发明的保护范围。
Claims
1、 一种 IP多媒体子系统 IMS监听的实现方法, 其特征在于, 包括: 为通讯方分配媒体锚定点;
在所述通讯方通过所述媒体锚定点通讯时, 复制通讯内容, 以完成对 所述通讯内容的监听。
2、 如权利要求 1所述的方法, 其特征在于, 所述为通讯方分配媒体 锚定点包括: 控制会话内容监听复制功能 CC-I I F为通讯方分配媒体锚定 点;
所述复制通讯内容包括: 控制所述 CC-I IF复制所述通讯内容。
3、 如权利要求 1所述的方法, 其特征在于, 在所述为通讯方分配媒 体锚定点之前, 还包括:
接收来自 IMS网元的通过媒体锚定请求消息发送的需要监听的通讯方 的媒体信息。
4、 如权利要求 3所述的方法, 其特征在于, 所述方法还包括: 将所 述 IMS网元的通过媒体锚定请求消息发送的需要监听的通讯方的媒体信息 替换为所述通讯方分配的媒体锚定点的媒体信息。
5、 如权利要求 1所述的方法, 其特征在于, 在所述为通讯方分配媒 体锚定点之后, 还包括:
通过媒体锚定结果响应消息将为通讯方分配的媒体锚定点发送给 IMS 网元。
6、 如权利要求 3或 4或 5所述的方法, 其特征在于, 所述 IMS网元 包括以下中的一种或几种:
服务呼叫会话控制功能 S-CSCF;
应用服务器 AS;
媒体网关控制功能 MGCF;
代理呼叫会话控制功能 P-CSCF。
7、 如权利要求 3或 4或 5所述的方法, 其特征在于, 所述媒体锚定 请求消息包括: 呼叫内会话初始化协议 S IP消息、 呼叫外消息; 所述锚定 结果响应消息包括: 呼叫内会话初始化协议 S IP消息、 呼叫外消息;
所述呼叫外消息包括: s iP消息中的呼叫外消息或非 S IP消息的呼叫 外消息; 所述 S IP消息中的呼叫外消息包括 INFO消息或 MESSAGE消息; 所述非 S IP消息的呼叫外消息包括 D iameter消息;
所述呼叫内 S IP消息包括直接将 S IP会话消息作为锚定请求消息发给 CCTF的消息。
8、 如权利要求 1所述的方法, 其特征在于, 所述通讯内容包括: 语 音通话内容、 传真内容、 MODEM内容、 视频通话内容、 数据交互内容中的 一种或多种。
9、 如权利要求 1所述的方法, 其特征在于, 在所述复制通讯内容之 后, 还包括:
所述 CC-I I F将所述通讯内容发送给监听中心;
所述将通讯内容发送给监听中心包括以下中的一种或几种:
通过窄带电路连接在连接电路上复制所述通讯内容的方式将所述通 讯内容发送给所述监听中心;
通过窄带电路连接向监听中心发起窄带呼叫的方式将所述通讯内容 发送给所述监听中心;
通过 IP连接在所述 IP连接上复制所述通讯内容的方式将所述通讯内 容发送给所述监听中心;
通过 IP连接在所述 IP连接上发起 S IP呼叫的方式将所述通讯内容发 送给所述监听中心。
10、 一种 IMS监听的实现系统, 其特征在于, 包括:
通讯内容监听触发功能 CCTF ,用于控制会话内容监听复制功能 CC-I I F 为通讯方分配媒体锚定点, 并在所述通讯方通过所述媒体锚定点通讯时,
控制所述 CC-I IF复制通讯内容, 以完成对所述通讯内容的监听;
CC-I I F , 用于为通讯方分配媒体锚定点, 并在所述通讯方通过所述媒 体锚定点通讯时复制通讯内容。
11、 如权利要求 10所述的系统, 其特征在于, 还包括:
IMS网元, 用于通过媒体锚定请求消息将锚定的通讯方的媒体信息发 送给 CCTF。
12、 如权利要求 11所述的系统, 其特征在于, 所述 IMS网元还用于 根据所述 CC-I IF为通讯方分配的媒体锚定点, 替换原有的会话描述协议 SDP地址。
13、 一种 IMS监听的实现装置, 其特征在于, 包括:
第一控制模块, 用于控制会话内容监听复制功能 CC-I I F为通讯方分 配媒体锚定点;
第二控制模块, 用于在所述通讯方通过所述媒体锚定点通讯时, 控制 所述 CC-I IF复制通讯内容, 以完成对所述通讯内容的监听。
14、 如权利要求 13所述的装置, 其特征在于, 还包括:
接收模块, 用于接收来自 IMS网元的通过媒体锚定请求消息发送的需 要监听的通讯方的媒体信息。
15、 一种 IMS监听的实现装置, 其特征在于, 包括:
分配模块, 用于为通讯方分配媒体锚定点;
复制模块, 用于在所述通讯方通过所述媒体锚定点通讯时, 复制通讯 内容, 以完成对所述通讯内容的监听。
16、 如权利要求 15所述的装置, 其特征在于, 还包括:
发送模块, 用于将所述通讯内容发送给监听中心。
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| EP09829958.9A EP2247031B1 (en) | 2008-12-01 | 2009-07-22 | Implementation method, system and device for ims monitoring |
| US12/628,416 US8320363B2 (en) | 2008-12-01 | 2009-12-01 | Implementation method, system and device of IMS interception |
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| US8320363B2 (en) | 2008-12-01 | 2012-11-27 | Huawei Technologies Co., Ltd. | Implementation method, system and device of IMS interception |
| CN101420432B (zh) * | 2008-12-01 | 2012-10-17 | 华为技术有限公司 | 一种ims监听的实现方法、系统及装置 |
| CN101583129A (zh) * | 2009-06-12 | 2009-11-18 | 中兴通讯股份有限公司 | 一种ip多媒体子系统网络中的合法监听系统及方法 |
| US8886789B2 (en) | 2010-05-19 | 2014-11-11 | Avaya Inc. | SIP monitoring and control anchor points |
| US9450989B2 (en) * | 2010-05-19 | 2016-09-20 | Avaya Inc. | SIP anchor points to populate common communication logs |
| CN101980481B (zh) * | 2010-11-05 | 2012-12-05 | 杭州思福迪信息技术有限公司 | 一种安全终端仿真协议监控时实现会话复制和跟踪的方法 |
| CN102487520B (zh) * | 2010-12-02 | 2015-08-12 | 中兴通讯股份有限公司 | Ip多媒体子系统中媒体内容监听方法及装置 |
| CN102487521B (zh) * | 2010-12-03 | 2016-06-08 | 中兴通讯股份有限公司 | Ip多媒体子系统中媒体内容监听方法及装置 |
| US8510435B2 (en) | 2010-12-27 | 2013-08-13 | Avaya Inc. | Highly scalable and distributed call/media modeling and control framework |
| CN102647311A (zh) * | 2012-04-28 | 2012-08-22 | 中兴通讯股份有限公司南京分公司 | 通信监听的指示、实现方法及装置 |
| EP3086593B1 (en) * | 2015-04-20 | 2019-09-11 | Vodafone IP Licensing limited | Network entity and method for monitoring an ims-based service |
| CN108235299B (zh) * | 2016-12-21 | 2020-08-28 | 中国移动通信集团公司 | 一种VoLTE媒体面质量的测试方法及装置 |
| CN111866772B (zh) * | 2019-04-25 | 2022-06-14 | 中国移动通信集团安徽有限公司 | 防止盗打电话的方法、装置、计算机设备及计算机存储介质 |
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| CN1642115A (zh) * | 2004-01-16 | 2005-07-20 | 华为技术有限公司 | 一种实现ip多媒体业务监听的系统及方法 |
| CN1870543A (zh) * | 2005-12-30 | 2006-11-29 | 华为技术有限公司 | 应用服务器、使用其的监听相关事件的上报方法和系统 |
| CN101420432A (zh) * | 2008-12-01 | 2009-04-29 | 华为技术有限公司 | 一种ims监听的实现方法、系统及装置 |
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| CN101141761A (zh) * | 2007-09-30 | 2008-03-12 | 华为技术有限公司 | 一种监听的方法、系统及装置 |
| CN101237660B (zh) * | 2008-02-28 | 2012-05-09 | 中兴通讯股份有限公司 | 一种在下一代网络中实现监听的系统和方法 |
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| CN1642115A (zh) * | 2004-01-16 | 2005-07-20 | 华为技术有限公司 | 一种实现ip多媒体业务监听的系统及方法 |
| CN1870543A (zh) * | 2005-12-30 | 2006-11-29 | 华为技术有限公司 | 应用服务器、使用其的监听相关事件的上报方法和系统 |
| CN101420432A (zh) * | 2008-12-01 | 2009-04-29 | 华为技术有限公司 | 一种ims监听的实现方法、系统及装置 |
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