CN101145979A - Method and system for legal monitoring of public service in IP multimedia subsystem - Google Patents
Method and system for legal monitoring of public service in IP multimedia subsystem Download PDFInfo
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Abstract
The invention provides a method and system for legally snooping common business of PSI mark by introducing snooping module into an application server AS in an IP multimedia sub-system. A snooping management function module determines the application server to which a common business mark belongs after receiving a common business snooping request transmitted from a snooping center, and transmits the snooping request to the snooping module of the application server. The snooping module starts conversation snooping and returns a confirmation information back to the snooping center through the snooping management function module. The snooping module transmits a message satisfying the snooping condition to the snooping center. The snooping center transmits a cancel request to the snooping module through the snooping management function module when an administrator cancels the snooping of an appointed business, and feeds a confirmation message to the snooping center through the snooping management function module. The invention can be used for snooping in IP multimedia sub-system under different PSI route mechanisms.
Description
Technical field
The present invention relates to IP Multimedia System (IP Multimedia Subsystem, the method of the legal monitoring business IMS) and system thereof relate in particular in the IP Multimedia System method and the system thereof that the Intercept related information of the common service represented with public service identity are carried out Lawful Interception.
Background technology
In order to protect public interest and national security, the law of various countries stipulates that all telecom operators must can provide legal monitoring service.Legal monitoring business belongs to control type business, be meant (Law Enforcement Agency according to state's laws actuator, LEA) requirement, communication network has Content of Communication (the Content of Communication that the intercept communications business is provided to LEA, CC) and Intercept related information (Intercept Related Information, ability IRI).Content of Communication CC refers to the practical communication content in the user conversation process, as voice, Media Stream, and the carrying content of other types, Intercept related information IRI refers to the information relevant with intercepted user and session, comprises contents such as user profile, current state, communication signaling.The present invention only relates to Intercept related information IRI.
The object of Lawful Interception has two classes: terminal use and common service.The terminal use refers to domestic consumer, uses telephone number or public user identity PUI (Public User Identity) to identify; The business that provided by service provider or content supplier is provided common service, identify by some specific telephone numbers or public service identity PSI (Public Service Identity), comprise meeting, chatroom, wireless talkback business, present business such as business.
In legacy network, (comprise circuit-switched network and flexible exchanging network), adopt central controlled mode, provide unified conversation control function by core net, terminal use and common service are all controlled by core net, therefore identical to the monitor method of terminal use and common service, all finish the monitoring of Content of Communication CC and Intercept related information IRI by core net.
But IP Multimedia System adopts professional mode of separating with control, and core net is finished session control, and (Application Server, AS) management and control are professional for application server.Can realize user's monitoring by core net, but have defective and deficiency when common service Intercept related information IRI monitored.
According to " 3GPP TS 33.107:3G security; Lawful interception architecture andfunctions " definition, by P-CSCF (Proxy Call Session Control Function, Proxy Call Session Control Function) and/or S-CSCF (Serving Call Session Control Function, service call conversation control function) monitors IP Multimedia System, promptly realize to monitoring the Lawful Interception of related content IRI, referring to Fig. 1 by the equipment of core net.
Fig. 1 is the structure chart of the IP Multimedia System IRI Lawful Interception of 3GPP definition, show related network element and the annexation of IRI Lawful Interception in IMS, comprise LEMF 11 (LawEnforcement Monitoring Facility, the listening center audiomonitor), ADMF 12 (Administration Function, the management of monitor functional module), DF213 (Delivery Function2, the transmitting function module), P-CSCF/S-CSCF 14 (Proxy CSCF/Serving CSCF, proxy CSCF/serving CSCF).LEMF sends interception request by the HI1 interface to ADMF, ADMF controls DF2 and P-CSCF/S-CSCF respectively by X1-1 and X1-2 internal interface, when monitoring activation, P-CSCF/S-CSCF sends to DF2 with the information that listens to by the X2 internal interface, and is transmitted to LEMF by DF2 by HI2.
In IP Multimedia System, introduced public service identity PSI (Public ServiceIdentity), be used to define common service, business such as can represent meeting, conversation group, chatroom, present, for example the business of a chat type can use the method for PSI (sip:chatlist X@example.com) to identify.These PSI are created and management by AS, and the business that they identified also is responsible for execution by AS, and the IMS system provides the ability of carrying out the message route by PSI.Need carry out Lawful Interception to common service in some occasion, as monitor the session of certain chatroom, certain meeting, certain PoC group,, at this moment need common service to be monitored by PSI because the user who participates in has uncertainty.
Because it is uncertain using the user of common service, the access approach is also uncertain, the user may be from the P-CSCF visit common service of local network or other networks, and therefore there is defective in monitoring to common service by P-CSCF, can't realize the complete monitoring of common service.
In IP Multimedia System, S-CSCF can provide professional ground, home to return to service, but since very flexible to the routing mode of PSI, by S-CSCF common service is monitored also existing problems, and this can be found out by following analysis.
According to " 3GPP TS 23.228:Technical Specification Group Services and SystemAspects; IP Multimedia Subsystem (IMS) ", PSI route principle there are following 7 kinds of modes:
(1) origination side S-CSCF forwards SIP (conversation initialized protocol) request on the application server AS of control PSI to according to the rule that is provided with.
(2) HSS of termination side is the assignation information of PSI user management S-CSCF, will be asked directly to be transferred to the AS of control PSI by corresponding S-CSCF.
(3) HSS of termination side is the AS address information of PSI user management control corresponding PSI, will be asked directly to be transferred to the AS of control PSI by I-CSCF.
(4) for the PSI based on subdomain, initial S-CSCF utilizes the mechanism of DNS inside, and PSI is resolved to the actual address of AS, and will ask directly to be transferred to the AS of control PSI.
(5) for the PSI based on subdomain, termination side I-CSCF utilizes the mechanism of DNS inside, and PSI is resolved to the actual address of AS, and will ask directly to be transferred to the AS of control PSI.
(6) request of the AS initiation of control PSI, AS can request directly forward objective network to.
(7) if PSI has distributed S-CSCF, the request that the AS of control PSI initiates forwards this S-CSCF to.
In upper type, (2) and the sip message of (7) session through S-CSCF, can carry out common service is carried out the monitoring of IRI by S-CSCF, and other 5 kinds of routing modes, because sip message is uncertain without the S-CSCF of S-CSCF or process, causes to carry out IRI by S-CSCF to common service and monitor.
From top analysis as can be seen, because IP Multimedia System has adopted the professional framework that separates with control, simultaneously more flexible with the routing mode of the relevant signaling of common service, the simple agreement of formulating according to 3GPP can't satisfy monitoring to common service by equipment of the core network (P-CSCF and S-CSCF).
Summary of the invention
The technical problem to be solved in the present invention provides in IP Multimedia System method and the system thereof that the Intercept related information IRI of the common service of PSI sign is carried out Lawful Interception, can be applied to the monitoring under the PSI routing mechanisms different in the IP Multimedia System.
In order to solve the problems of the technologies described above, the invention provides a kind of method of the common service Lawful Interception to IP Multimedia System, may further comprise the steps:
(a) listening center is to the interception request of management of monitor functional module transmission to common service, and request comprises eavesdropping target's public service identity;
(b) after the management of monitor functional module is received described interception request,, determine the application server at public service identity institute home to return to, and send interception request to the monitoring module of this application server according to the public service identity of eavesdropping target in the message;
(c) described monitoring module is registered the public service identity in this request in the monitor log district, starts the monitoring to this session, returns confirmation by the management of monitor functional module to listening center then;
(d) described monitoring module is monitored the message from service call conversation control function S-CSCF or intercommunication CSCF I-CSCF, as meet the monitoring condition then when the application server Service Processing Module is transmitted this message, to this message of transmitting function module forwards; For message, as meet the monitoring condition and then this message is forwarded to simultaneously S-CSCF or I-CSCF and transmitting function module from the application server Service Processing Module.
Further, said method can also have following characteristics: described step (d) is further comprising the steps of afterwards:
(e) when keeper cancellation during to the monitoring of specified services, listening center sends the cancellation request by the management of monitor functional module to monitoring module, comprises the public service identity of wanting monitoring service;
(f) monitor module is deleted the public service identity in this request from monitor log registration data, and return acknowledge message to listening center by the management of monitor functional module.
Further, said method can also have following characteristics:
Described management of monitor functional module has disposed routing resolution rule to public service identity according to monitoring the network planning, and in the described step (b), the management of monitor functional module is determined the application server at the professional institute of public service identity home to return to according to this rule.
Further, said method can also have following characteristics:
In the described step (c), described monitoring module is also checked the session whether this public service identity has been arranged on this equipment, if exist, then changing this session listening state is state of activation; In the described step (f), monitor module and also check the session whether this public service identity has been arranged on this equipment, if exist, then the listening state with this session changes deactivated state into.
Further, said method can also have following characteristics: in the described step (d), the processing of monitoring the message that module sends S-CSCF or I-CSCF may further comprise the steps:
(d1) monitor the message that module receives that S-CSCF or I-CSCF send after, by monitoring whether this message of module check is conversation establishing message, if conversation establishing message, execution in step (d2), otherwise, execution in step (d3);
(d2) whether the public service identity of monitoring this session of module check registers in the monitor log district:
If it is registered, monitor module with this session listening state for being set to state of activation, monitor module to this conversation establishing message of transmitting function module forwards, and monitor module and send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing;
If unregistered, monitor module and send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing;
(d3) if not conversation establishing message, whether the listening state of monitoring this session of module check is in state of activation;
If be in state of activation, monitor module and transmit this message to transmitting function module and application server Service Processing Module simultaneously;
If be not in state of activation, then monitor module and only send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing.
Further, said method can also have following characteristics: in the described step (d), the Message Processing that monitoring module application server Service Processing Module is sent may further comprise the steps:
The message of sending for the application server Service Processing Module, monitor module and judge according to the public service identity of this session in the message whether the listening state of this session is state of activation, if, monitor module and transmit this message simultaneously to transmitting function module and S-CSCF or I-CSCF, otherwise, only transmit this message to S-CSCF or I-CSCF.
Further, said method can also have following characteristics: in the described step (a), described listening center sends to by the management of monitor functional module in the interception request of described monitoring module except that the public service identity of the session that will monitor, also comprise the information of monitoring termination condition, described monitoring module is when this termination condition satisfies, automatically stop monitoring, and send the notification message that this session of cancellation is monitored to listening center by the management of monitor functional module to this session.
The system of a kind of common service Lawful Interception to IP Multimedia System provided by the invention, comprise listening center, the management of monitor functional module that links to each other with this listening center and transmitting function module, proxy call session control function module, service call conversation control function module and application server, it is characterized in that, the monitoring module of a common service that described application server is built-in, this monitoring module has the communication interface with management of monitor functional module and transmitting function module, further comprise monitoring and set up the unit and monitor processing unit, wherein:
Described monitoring is set up the unit and is used to receive the interception request message that the management of monitor functional module is sent, and the public service identity in the message is registered to the monitor log district, starts the monitoring to this session, and returns confirmation to the management of monitor functional module;
Described monitoring processing unit is used to monitor the message from service call conversation control function S-CSCF or intercommunication CSCF I-CSCF, as meet the monitoring condition then when the application server Service Processing Module is transmitted this message, to this message of transmitting function module forwards; For message, as meet the monitoring condition and then this message is forwarded to simultaneously S-CSCF or I-CSCF and transmitting function module from the application server Service Processing Module.
Further, said system can also comprise following feature: described monitoring module also comprises monitors the cancellation unit:
Further, said system can also comprise following feature: described monitoring cancellation unit is used to receive the monitoring cancellation request that the management of monitor functional module is sent, delete the public service identity of corresponding session in the monitor log district according to the public service identity in the message, stop monitoring, and return confirmation to the management of monitor functional module to this session.
Further, said system can also comprise following feature: described monitoring module receives the management control request of management of monitor functional module by the X1-1 interface, sends monitoring information to common service by X2 interface to the transmitting function module.
Further, said system can also comprise following feature: described monitoring is set up the unit after receiving interception request message, also checks the session whether this public service identity has been arranged on this equipment, if exist, then changing this session listening state is state of activation; The session whether this public service identity has been arranged on this equipment is also checked in described monitoring cancellation unit after receiving that monitoring cancellation asks, if exist, then the listening state with this session changes deactivated state into.
Further, said system can also comprise following feature: described monitoring processing unit further comprises:
First subelement, be used for after receiving the message that the application server Service Processing Module is sent, whether the listening state of judging this session according to the public service identity of this session in the message is state of activation, if, transmit this message simultaneously to transmitting function module and S-CSCF or I-CSCF, otherwise, only transmit this message to S-CSCF or I-CSCF;
Second subelement is used for after receiving the message that S-CSCF or I-CSCF send, and judges its whether conversation establishing message:
If conversation establishing message, check then whether the public service identity of this session registers in the monitor log district, as registered, with this session listening state for being set to state of activation, simultaneously transmit this message to transmitting function module and application server Service Processing Module, as unregistered, then only transmit this message to the application server Service Processing Module;
If not conversation establishing message, whether the listening state of monitoring this session of module check is in state of activation, if be in state of activation, transmits this message to transmitting function module and application server Service Processing Module simultaneously, otherwise, only transmit this message to the application server Service Processing Module.
Further, said system can also comprise following feature: the monitoring termination condition information in the interception request is also preserved in described monitoring cancellation unit, and when this termination condition satisfies, automatically stop monitoring, and return the notification message that this session of cancellation is monitored to the management of monitor functional module to this session.
Compared with prior art, because the present invention has used the mode in the built-in monitoring module of AS in IP Multimedia System, therefore reached under different PSI routing mechanisms concentrating with the common service of PSI sign and the effect of complete monitoring, avoided the defective and the deficiency of the mode that the 3GPP related protocol defines.Simultaneously, this mode does not need to change topology of networks and routing configuration, and network architecture is not had influence, has good exploitativeness and autgmentability.
Description of drawings
Fig. 1 is the structure chart of the IP Multimedia System IRI Lawful Interception of 3GPP definition.
Fig. 2 adopts the built-in common service of AS to monitor the structure chart of modular manner.
Fig. 3 is the schematic diagram of AS snoop procedure interacting message.
Fig. 4 is that AS monitors the flow chart that activates.
Fig. 5 is that the message of AS is monitored flow chart.
Fig. 6 is the flow chart that AS monitors cancellation.
Embodiment
The IP Multimedia System common service is monitored the implementation method that related news carry out Lawful Interception elaborate present embodiment is a kind of below in conjunction with accompanying drawing.
Fig. 1 is the structure chart of the IP Multimedia System IRI Lawful Interception of 3GPP definition, show network element and the annexation related with the IRI Lawful Interception, comprise LEMF 11 (Law EnforcementMonitoring Facility, the listening center audiomonitor), ADMF 12 (Administration Function, the management of monitor functional module), DF2 13 (Delivery Function 2, the transmitting function module), P-CSCF/S-CSCF 14 (Proxy CSCF/Serving CSCF, proxy CSCF/serving CSCF).LEMF sends interception request by the HI1 interface to ADMF, ADMF controls DF2 and P-CSCF/S-CSCF respectively by X1-1 and X1-2 internal interface, when monitoring activation, P-CSCF/S-CSCF sends to DF2 with the information that listens to by the X2 internal interface, and is transmitted to LEMF by DF2 by HI2.
Because IP Multimedia System has adopted the professional framework that separates with control, simultaneously more flexible with the routing mode of the relevant signaling of common service, the simple agreement of formulating according to 3GPP can't satisfy monitoring to common service by equipment of the core network (P-CSCF and S-CSCF).In IP Multimedia System, introduced public service identity PSI (Public Service Identity), be used to define common service.These PSI are created and management by AS, and the business that they identified also is responsible for execution by AS.Therefore, need monitor common service by PSI by AS.
Fig. 2 is that the present invention adopts the built-in common service of AS to monitor the structure chart of modular manner, show AS25 (Application Server, application server) position and and audiomonitor between annexation, AS and the corresponding interface on the basis of Fig. 1, have been increased, monitor module at the built-in common service of application server AS, in the inner monitoring that realizes common service of AS, and the interface of setting and audiomonitor.AS receives the management control request of ADMF 22 by the X1-1 interface, sends monitoring information to common service by X2 interface to DF223.
Monitoring module further comprises: monitor and set up the unit, monitor the cancellation unit and monitor processing unit, wherein:
Described monitoring is set up the unit and is used to receive the interception request message that the management of monitor functional module is sent, public service identity in the message is registered to the monitor log district, startup is to the monitoring of this session, and whether the session of this public service identity arranged on this equipment of inspection, if exist, then changing this session listening state is state of activation, returns confirmation to the management of monitor functional module then;
Described monitoring processing unit is used to monitor the message of discrepancy application server, and the message that will meet the monitoring condition sends to the transmitting function module, further comprises:
First subelement, be used for after receiving the message that the application server Service Processing Module is sent, whether the listening state of judging this session according to the public service identity of this session in the message is state of activation, if, transmit this message simultaneously to transmitting function module and service call conversation control function S-CSCF or intercommunication CSCF I-CSCF (S-CSCF or I-CSCF), otherwise, only transmit this message to S-CSCF or I-CSCF;
Second subelement is used for after receiving the message that S-CSCF or I-CSCF send, and judges its whether conversation establishing message:
If conversation establishing message, check then whether the public service identity of this session registers in the monitor log district, as registered, with this session listening state for being set to state of activation, simultaneously transmit this message to transmitting function module and application server Service Processing Module, as unregistered, then only transmit this message to the application server Service Processing Module;
If not conversation establishing message, whether the listening state of monitoring this session of module check is in state of activation, if be in state of activation, transmits this message to transmitting function module and application server Service Processing Module simultaneously, otherwise, only transmit this message to the application server Service Processing Module.
Described monitoring cancellation unit is used to receive the monitoring cancellation request that the management of monitor functional module is sent, delete the public service identity of corresponding session in the monitor log district according to the public service identity in the message, also check the session whether this public service identity has been arranged on this equipment, if exist, then the listening state with this session changes deactivated state into, stop monitoring then, and return confirmation to the management of monitor functional module to this session.
Fig. 3 is the interaction figure of AS snoop procedure, has described the snoop procedure to professional related news on the whole, may further comprise the steps:
Step 301, AS monitors module and ADMF establishes a connection, according to monitoring the network planning, disposed routing resolution rule at management of monitor functional module elements ADMF to PSI, wherein said resolution rules can use ripe routing resolution rules such as local profile, DNS configuration neatly.According to this rule, ADMF can determine the listening point of PSI business, i.e. AS under the PSI.For snoop procedure is got ready;
Step 302, the monitoring that ADMF receives listening center equipment (LEMF) activates request, resolves the PSI of monitoring service, sends the request of activation of monitoring according to the PSI that resolves gained to the AS of business ownership;
Step 303, AS monitors module and receives the request of activation of monitoring, and starts the monitoring to this session, sends to ADMF and monitors the activation confirmation response;
Step 304, S-CSCF or I-CSCF monitor module to AS and send session foundation request according to the service identification PSI in user's request;
Step 305, AS monitors module and transmits this message to the Service Processing Module of AS or AS;
Step 306 in step 305, is checked the PSI of the service identification of asking in the request message, monitors if desired, sends this message to DF2;
Step 307, AS returns session to listening center equipment (LEMF) and sets up response;
Step 308, AS monitors module and transmits corresponding message to S-CSCF or I-CSCF;
Step 309 in step 308, sends the information of response message to DF2;
Step 310 continues to handle other session informations;
If finish whole snoop procedure, listening center equipment sends the request that cancellation is monitored to monitoring module so, and concrete steps are as follows
Step 311, when keeper cancellation during to the monitoring of specified services, ADMF receives the monitoring cancellation request of listening center equipment (LEMF), monitors module to AS and sends the deactivation request of monitoring;
Step 312, AS monitoring module stops the monitoring to corresponding service, and monitors deactivation to the ADMF transmission and confirm to respond, and returns acknowledge message by ADMF to listening center.
So, finished from setting up snoop procedure, sending all processes that monitoring information is monitored to cancellation.
In Fig. 4, Fig. 5 and Fig. 6, introduce respectively below and monitor the detailed process that activation, message monitoring and cancellation are monitored.
Fig. 4 is a flow chart of monitoring activation at the AS of concrete monitoring activation, has described the detailed process of the activation of monitoring, and may further comprise the steps:
Whether step 404 has had the session of this PSI on this equipment of monitoring module check on the AS, if exist, forward step 405 to, otherwise jump to step 406;
More than monitoring module is optionally to the inspection whether session of this PSI has been arranged on this equipment, and the real-time of monitoring when less demanding, can not carried out yet.
Fig. 5 is that the message of AS is monitored flow chart, has described AS and has monitored the processing procedure of module to message, may further comprise the steps:
Step 502 monitors whether this message of module check is conversation establishing message, if change step 503 over to, otherwise jump to step 506;
Step 504 is monitored this session listening state of module and is set to state of activation;
Step 505 is monitored module and is transmitted this conversation establishing message to DF2, and jumps to step 508;
Step 506 is monitored module check session listening state and whether is in state of activation, if be in state of activation, forwards step 507 to, otherwise directly jumps to step 508;
Step 507 is monitored module and is transmitted this message to DF2;
Step 508 is monitored module and is sent a message to the AS Service Processing Module, by Service Processing Module according to this message of business logic processing.
After this, for message from S-CSCF or I-CSCF, monitor module and judge according to PSI whether the listening state of this session is activated, if activate, monitor module when the AS Service Processing Module is transmitted this message, transmit this message to DF2, otherwise, just forward the message to the AS Service Processing Module.For message from the AS Service Processing Module, monitor module and judge according to PSI whether the listening state of this session is activated equally,, this message is forwarded to S-CSCF or I-CSCF and DF2 simultaneously if activate, otherwise, only be forwarded to S-CSCF or I-CSCF.
Fig. 6 is the flow chart that AS monitors cancellation, has described the cancellation process of monitoring, and may further comprise the steps:
More than monitoring module also is optionally to the inspection whether session of this PSI has been arranged on this equipment,
In another embodiment, described listening center sends to by the management of monitor functional module in the interception request of described monitoring module except that the public service identity of the session that will monitor, also comprise the information of monitoring termination condition, described monitoring module is when this termination condition satisfies, automatically stop monitoring, and return the notification message that this session of cancellation is monitored to listening center by ADMF to this session.This monitoring termination condition can maybe need time period of monitoring for the duration of monitoring.In system, accordingly, the monitoring termination condition information in the interception request also need be preserved in described monitoring cancellation unit, and when this termination condition satisfies, automatically stop monitoring, and return the notification message that this session of cancellation is monitored to the management of monitor functional module to this session.
Claims (13)
1. method to the common service Lawful Interception of IP Multimedia System, a built-in common service is monitored module in the application server in this IP Multimedia System, and this module has the communication interface with management of monitor functional module and transmitting function module, and this method may further comprise the steps:
(a) listening center is to the interception request of management of monitor functional module transmission to common service, and request comprises eavesdropping target's public service identity;
(b) after the management of monitor functional module is received described interception request,, determine the application server at public service identity institute home to return to, and send interception request to the monitoring module of this application server according to the public service identity of eavesdropping target in the message;
(c) described monitoring module is registered the public service identity in this request in the monitor log district, starts the monitoring to this session, returns confirmation by the management of monitor functional module to listening center then;
(d) described monitoring module is monitored the message from service call conversation control function S-CSCF or intercommunication CSCF I-CSCF, as meet the monitoring condition then when the application server Service Processing Module is transmitted this message, to this message of transmitting function module forwards; For message, as meet the monitoring condition and then this message is forwarded to simultaneously S-CSCF or I-CSCF and transmitting function module from the application server Service Processing Module.
2. method according to claim 1, it is characterized in that: described step (d) is further comprising the steps of afterwards:
(e) when keeper cancellation during to the monitoring of specified services, listening center sends the cancellation request by the management of monitor functional module to monitoring module, comprises the public service identity of wanting monitoring service;
(f) monitor module is deleted the public service identity in this request from monitor log registration data, and return acknowledge message to listening center by the management of monitor functional module.
3. method according to claim 1 is characterized in that:
Described management of monitor functional module has disposed routing resolution rule to public service identity according to monitoring the network planning, and in the described step (b), the management of monitor functional module is determined the application server at the professional institute of public service identity home to return to according to this rule.
4. as method as described in the claim 2, it is characterized in that:
In the described step (c), described monitoring module is also checked the session whether this public service identity has been arranged on this equipment, if exist, then changing this session listening state is state of activation; In the described step (f), monitor module and also check the session whether this public service identity has been arranged on this equipment, if exist, then the listening state with this session changes deactivated state into.
5. method according to claim 1 is characterized in that, in the described step (d), the processing of monitoring the message that module sends S-CSCF or I-CSCF may further comprise the steps:
(d1) monitor the message that module receives that S-CSCF or I-CSCF send after, by monitoring whether this message of module check is conversation establishing message, if conversation establishing message, execution in step (d2), otherwise, execution in step (d3);
(d2) whether the public service identity of monitoring this session of module check registers in the monitor log district:
If it is registered, monitor module with this session listening state for being set to state of activation, monitor module to this conversation establishing message of transmitting function module forwards, and monitor module and send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing;
If unregistered, monitor module and send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing;
(d3) if not conversation establishing message, whether the listening state of monitoring this session of module check is in state of activation;
If be in state of activation, monitor module and transmit this message to transmitting function module and application server Service Processing Module simultaneously;
If be not in state of activation, then monitor module and only send a message to the application server Service Processing Module, by Service Processing Module according to this message of business logic processing.
6. method according to claim 1 is characterized in that, in the described step (d), monitors the Message Processing that module application server Service Processing Module sends and may further comprise the steps:
The message of sending for the application server Service Processing Module, monitor module and judge according to the public service identity of this session in the message whether the listening state of this session is state of activation, if, monitor module and transmit this message simultaneously to transmitting function module and S-CSCF or I-CSCF, otherwise, only transmit this message to S-CSCF or I-CSCF.
7. method according to claim 1, it is characterized in that, in the described step (a), described listening center sends to by the management of monitor functional module in the interception request of described monitoring module except that the public service identity of the session that will monitor, also comprise the information of monitoring termination condition, described monitoring module stops the monitoring to this session automatically when this termination condition satisfies, and sends the notification message that this session of cancellation is monitored by the management of monitor functional module to listening center.
8. system to the common service Lawful Interception of IP Multimedia System, comprise listening center, the management of monitor functional module that links to each other with this listening center and transmitting function module, proxy call session control function module, service call conversation control function module and application server, it is characterized in that, the monitoring module of a common service that described application server is built-in, this monitoring module has the communication interface with management of monitor functional module and transmitting function module, further comprise monitoring and set up the unit and monitor processing unit, wherein:
Described monitoring is set up the unit and is used to receive the interception request message that the management of monitor functional module is sent, and the public service identity in the message is registered to the monitor log district, starts the monitoring to this session, and returns confirmation to the management of monitor functional module;
Described monitoring processing unit is used to monitor the message from service call conversation control function S-CSCF or intercommunication CSCF I-CSCF, as meet the monitoring condition then when the application server Service Processing Module is transmitted this message, to this message of transmitting function module forwards; For message, as meet the monitoring condition and then this message is forwarded to simultaneously S-CSCF or I-CSCF and transmitting function module from the application server Service Processing Module.
9. as system as described in the claim 8, it is characterized in that: described monitoring module also comprises monitors the cancellation unit:
Described monitoring cancellation unit is used to receive the monitoring cancellation request that the management of monitor functional module is sent, delete the public service identity of corresponding session in the monitor log district according to the public service identity in the message, stop monitoring, and return confirmation to the management of monitor functional module to this session.
10. system as claimed in claim 8 is characterized in that, described monitoring module receives the management control request of management of monitor functional module by the X1-1 interface, sends monitoring information to common service by X2 interface to the transmitting function module.
11. system as claimed in claim 8 is characterized in that, described monitoring is set up the unit after receiving interception request message, also checks the session whether this public service identity has been arranged on this equipment, if exist, then changing this session listening state is state of activation; The session whether this public service identity has been arranged on this equipment is also checked in described monitoring cancellation unit after receiving that monitoring cancellation asks, if exist, then the listening state with this session changes deactivated state into.
12. system as claimed in claim 8 is characterized in that, described monitoring processing unit further comprises:
First subelement, be used for after receiving the message that the application server Service Processing Module is sent, whether the listening state of judging this session according to the public service identity of this session in the message is state of activation, if, transmit this message simultaneously to transmitting function module and S-CSCF or I-CSCF, otherwise, only transmit this message to S-CSCF or I-CSCF;
Second subelement is used for after receiving the message that S-CSCF or I-CSCF send, and judges its whether conversation establishing message:
If conversation establishing message, check then whether the public service identity of this session registers in the monitor log district, as registered, with this session listening state for being set to state of activation, simultaneously transmit this message to transmitting function module and application server Service Processing Module, as unregistered, then only transmit this message to the application server Service Processing Module;
If not conversation establishing message, whether the listening state of monitoring this session of module check is in state of activation, if be in state of activation, transmits this message to transmitting function module and application server Service Processing Module simultaneously, otherwise, only transmit this message to the application server Service Processing Module.
13. system as claimed in claim 9, it is characterized in that, the monitoring termination condition information in the interception request is also preserved in described monitoring cancellation unit, and when this termination condition satisfies, automatically stop monitoring, and return the notification message that this session of cancellation is monitored to the management of monitor functional module to this session.
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| CNB2006101272085A CN100518101C (en) | 2006-09-12 | 2006-09-12 | Method and system for legal monitoring of public service in IP multimedia subsystem |
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| CNB2006101272085A CN100518101C (en) | 2006-09-12 | 2006-09-12 | Method and system for legal monitoring of public service in IP multimedia subsystem |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420432B (en) * | 2008-12-01 | 2012-10-17 | 华为技术有限公司 | Implementing method, system and apparatus for IMS listening |
| US8320363B2 (en) | 2008-12-01 | 2012-11-27 | Huawei Technologies Co., Ltd. | Implementation method, system and device of IMS interception |
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2006
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420432B (en) * | 2008-12-01 | 2012-10-17 | 华为技术有限公司 | Implementing method, system and apparatus for IMS listening |
| US8320363B2 (en) | 2008-12-01 | 2012-11-27 | Huawei Technologies Co., Ltd. | Implementation method, system and device of IMS interception |
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| CN100518101C (en) | 2009-07-22 |
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