CN100397831C - System and method for realizing IP multimedia business monitoring - Google Patents
System and method for realizing IP multimedia business monitoring Download PDFInfo
- Publication number
- CN100397831C CN100397831C CNB2004100010300A CN200410001030A CN100397831C CN 100397831 C CN100397831 C CN 100397831C CN B2004100010300 A CNB2004100010300 A CN B2004100010300A CN 200410001030 A CN200410001030 A CN 200410001030A CN 100397831 C CN100397831 C CN 100397831C
- Authority
- CN
- China
- Prior art keywords
- cscf
- user
- content
- listening center
- multimedia service
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention discloses a system for monitoring IP multimedia service. The system comprises the steps that a monitoring center issues a monitoring command to CSCF, and the monitoring command comprises monitored user identification; whether a corresponding user end of the monitored user identification carries out relevant events of the IP multimedia service or communication is monitored by the CSCF in real time. When the relevant events of the IP multimedia service are carried out by the CSCF, relevant event information of a control surface of the multimedia service is notified to the monitoring center by the CSCF. When the communication is carried out by the CSCF, the CSCF commands GGSN to transmit communication content of the user to the monitoring center, and the communication content comprises the address of the monitoring center. After the command is received by the GGSN, the communication data content of the monitored user is copied, and the relevant event information of a user terminal and the copied user communication data content are transmitted to the monitoring center according to the address of the monitoring center. Meanwhile, the present invention also discloses a method for monitoring the IP multimedia service, which can monitor relevant event information and communication content of IMS multimedia service.
Description
Technical field
The present invention relates to monitoring technique, be meant a kind of system and method for realizing that IP multimedia service is monitored especially.
Background technology
Development along with mobile communication technology, people no longer are satisfied with single voice communication mode, and needing new multimedia communication mode, this multimedia communication comprises business such as end-to-end video and audio communication, instant message, collaborative work, is the business that new traffic mode and traditional voice merge.Trend based on Internet and communication network fusion, third generation mobile International Standards Organization (3GPP) has introduced IP Multimedia System (IMS) on the basis of packet radio bearer network, the target of IMS is according to personalized user data, the shielding user mode access, the degree of opening of control professional ability provides multimedia communication experiences.
Monitor function is the function that mandatory requirement communication operator of most in the world state security department provides, and mainly when relating to national security or law some specific user is carried out person-to-person communication and monitors.Monitor function is mainly realized jointly by listening center and mobile network's communication apparatus that state security department is authorized.Most of at present country has realized the monitoring to mobile subscriber's circuit domain speech business, and part country realizes the monitoring to mobile subscriber's Packet data service.For just at developing IP multimedia service, present also very imperfect monitoring scheme and monitoring system.
The 3GPP standard is supported the monitoring to the IP multimedia service dependent event at present, and the functional entity that relates generally to comprises the agent call State Control entity (P-CSCF) and the service call state controlled entity (S-CSCF) of listening center equipment, IP multimedia domain, MMD (IMS).Listening center issues snoop command and gives CSCF (P-CSCF and/or S-CSCF), comprises the sign of intercepted user in the order, after CSCF detects this User IP multimedia service dependent event, with dependent event information notice listening center.
Simultaneously, the 3GPP standard is supported the monitoring wireless Packet data service, comprises to the monitoring of Packet data service dependent event with to the monitoring of user communication content.The functional entity that relates generally to comprises listening center, packet domain device service GPRS Support Node (SGSN) and Gateway GPRS Support Node (GGSN).Listening center issues snoop command and gives GSN (SGSN and/or GGSN), the sign that comprises intercepted user in the order, after GSN detects this user's Packet data service dependent event, with Packet data service dependent event information notice listening center, simultaneously being sent to listening center after the user communication content replication.
Because the control signaling of IP multimedia service realizes that by the IP multimedia domain, MMD then by the packet domain carrying, there are the incidence relation of determining in control signaling and user communication content to the user communication content.But, it is fully independently that IP multimedia domain, MMD monitoring at present and Packet Service are monitored, both are not combined, listening center is monitored certain user, can only realize monitoring to this User IP multimedia service dependent event information, or to the monitoring of this user grouping data service dependent event information and user communication content.Because the mobile network packet domain is carried IP multimedia service and other data services simultaneously, browse, flow business or the like as online, if listening center need be monitored certain user's IP multimedia service dependent event information and IP multimedia service Content of communciation, but do not wish to monitor all Packet data services of this user, this demand can't realize at present.Consider that IP multimedia service is the end-to-end communication of a kind of single medium (comprising voice) or multiple media combination, soon will be used widely, all business of circuit domain comprise that voice will transfer to the IP multimedia domain, MMD gradually, so monitor the signaling and the user data of IP multimedia service, will be the stronger demand of security for all countries department.
In sum, the current IP multimedia domain, MMD is monitored and the Packet Service monitoring is fully independently, both is not combined.Listening center is monitored certain User IP multimedia service, by issuing snoop command to CSCF, realization is to the monitoring of this User IP multimedia service dependent event information, simultaneously, by issuing snoop command, realize monitoring to this user grouping data service dependent event information and user communication content to GSN.Because the mobile network packet domain is carried IP multimedia service and other data services simultaneously, browse, flow business or the like as online.If listening center need be monitored certain user's IP multimedia service dependent event information and IP multimedia service Content of communciation, but does not wish to monitor all Packet data services of this user, this demand can't realize at present.
Summary of the invention
In view of this, the purpose of this invention is to provide the system that a kind of IP multimedia service is monitored, make it realize monitoring IP multimedia service dependent event information and Content of communciation.
Another object of the present invention provides the method that a kind of IP multimedia service is monitored, and this method can realize IP multimedia service dependent event information and Content of communciation are realized monitoring.
The system that a kind of IP multimedia service provided by the invention is monitored comprises:
Listening center, issue to controlling call entity CSCF and to monitor IP multimedia service dependent event information or/and the snoop command of Content of Communication, receive the dependent event information of the IP multimedia service that Packet data service dependent event information that ggsn GGSN sends and user communication content and CSCF send; Comprise the intercepted user sign in the described snoop command;
CSCF is used to receive the snoop command that listening center issues, and according to intercepted user sign in the snoop command, detects the dependent event of the corresponding intercepted user of this sign and detected multimedia service chain of command dependent event is sent to listening center; The IP multimedia service communication of carrying out according to the snoop command monitoring users, and order GGSN sends to listening center with the Content of communciation that listens to;
GGSN receives the activation request from the packet data protocol content of user terminal, and the CSCF corresponding with the address information of CSCF in the binding information wherein carries out communication; Receive the snoop command that CSCF sends, duplicate the user communication content, and with packet data protocol content dependent event information and the user communication content after duplicating send listening center to.
Described CSCF is P-CSCF.
Described CSCF is the combination of P-CSCF and S-CSCF, and is connected by signaling interface between S-CSCF and the P-CSCF, wherein,
S-CSCF is used to receive the snoop command that listening center issues, and detects the dependent event of monitoring users and detected dependent event is sent to listening center according to snoop command; The IP multimedia service communication of carrying out according to the snoop command monitoring users, and send the order that the Content of communciation that listens to is sent to listening center to P-CSCF;
P-CSCF is used for sending to the order of listening center and carrying out communication with GGSN to the Content of communciation with listening to that GGSN forwarding S-CSCF sends.
It between listening center and the CSCF signaling interface.
Between listening center and the GGSN signaling interface and data-interface.
It between CSCF and the GGSN signaling interface.
The method that a kind of IP multimedia service provided by the invention is monitored comprises:
A. listening center issues the IP multimedia service dependent event of monitoring users and the snoop command of Content of communciation to CSCF, identifies comprising intercepted user;
B.CSCF monitors intercepted user in real time and identifies pairing user side and whether carrying out IP multimedia service dependent event or communication,
If carrying out IP multimedia service chain of command dependent event, then CSCF is with multimedia service chain of command dependent event information notice listening center;
If carrying out communication, then CSCF order GGSN sends this user's Content of communciation to listening center, wherein contains the listening center address; After GGSN receives this order, duplicate the communication data content of intercepted user, and according to the address of listening center, with the dependent event information of user terminal and the communication data content of the user after duplicating send to listening center.
Intercepted user described in the steps A is designated initial session protocol SIP sign, or the telephone number sign.
Dependent event comprises described in the step B: register, go registration, SIP call signaling.
When CSCF described in the steps A was S-CSCF, S-CSCF sent this user's Content of communciation among the step B to listening center by P-CSCF order GGSN.
When CSCF described in the steps A was P-CSCF, P-CSCF was direct command GGSN sends a Content of communciation from this user to listening center among the step B.
The present invention can realize monitoring to IMS multimedia service dependent event information and Content of communciation, satisfies the demand that the national security structure is monitored IP multimedia service.
Description of drawings
Fig. 1 is for realizing system configuration schematic diagram of the present invention;
Fig. 2 is for realizing the schematic flow sheet of method of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The network frame of monitoring IP multimedia service dependent event information of the present invention and Content of communciation as shown in Figure 1.Realize that the network functional entity of monitoring comprises: listening center 101, CSCF 102, GGSN 103 and user terminal (UE) 104.Wherein, between listening center 101 and the CSCF 102 between interface and CSCF102 and the GGSN 103 interface all be signaling interface, interface comprises signaling interface and data-interface between listening center 101 and the GGSN 103.IMS control signaling between UE 104 and the IMS territory 105 is by 106 carryings of PS territory, and the user communication content does not need through IMS territory 105 by 106 carryings of PS territory.CSCF refers to P-CSCF and/or S-CSCF, and the interface between P-CSCF and the S-CSCF is a signaling interface.The function of listening center is: issue the snoop command of IP multimedia service dependent event information and Content of communciation to CSCF, comprise the intercepted user sign, this sign can be SIP sign or telephone number sign; Receive Packet data service dependent event information and user communication content that GGSN sends.
The CSCF function comprises: detect the dependent event of intercepted user, as registering, go registration, SIP call signaling etc., with dependent event information notice listening center; Detect the IP multimedia service Content of communciation that needs this user and carry out monitoring, order GGSN notify listening center with this packet data protocol content (PDP context) dependent event information, and give listening center with the user communication content replication.Here, CSCF can be P-CSCF, can CSCF be the combination of P-CSCF and S-CSCF also.
When CSCF is the combination of P-CSCF and S-CSCF, be connected by signaling interface between S-CSCF and the P-CSCF.The CSCF that receives snoop command can have three kinds of situation: P-CSCF to receive, and P-CSCF and S-CSCF receive, S-CSCF receives.P-CSCF says the word to GGSN after receiving interception request, and S-CSCF says the word to GGSN by P-CSCF after receiving interception request.
If that receive snoop command is S-CSCF, then S-CSCF detects the multimedia service chain of command dependent event of monitoring users and detected dependent event is sent to listening center according to snoop command; The IP multimedia service communication of carrying out according to the snoop command monitoring users, and send the order that the Content of communciation that listens to is sent to listening center to GGSN by P-CSCF;
The GGSN function comprises: the CSCF address information that the PDP context that initiates by UE activates in the binding information that carries in the signaling finds corresponding CSCF, initiatively initiates the communication with this CSCF; Accept and carry out the snoop command of CSCF,, and will send listening center to after the user communication content replication PDP context dependent event information notice listening center.
At above-mentioned network frame, IP multimedia service dependent event information and Content of communciation are realized that the flow process of monitoring is as follows:
Step 201: listening center issues snoop command to CSCF, and comprising the intercepted user sign, the monitoring users sign can be SIP sign or telephone number sign, monitors IP multimedia service dependent event information and Content of communciation that content comprises intercepted user.
After step 202:CSCF receives snoop command, arrive the multimedia service chain of command dependent event of corresponding intercepted user according to the intercepted user label detection after, as registration, remove registration, SIP call signaling etc., and notify listening center with detected dependent event information.
Step 203: when user terminal need transmit user data, by GGSN initiation packet territory PDP context activation, comprising binding information, GGSN found corresponding C SCF according to the CSCF address information in the binding information, initiated the communication with CSCF.
Step 204:CSCF judges whether to carry out this user's IP multimedia service Content of communciation and monitors, if desired, then order GGSN with this PDP context dependent event information notice listening center, and give listening center with the user communication content replication, the address that comprises listening center in this order, execution in step 205 then, otherwise, jump out this flow process.
When listening center issues snoop command to the S-CSCF among the CSCF, owing between P-CSCF and the GGSN signaling interface is arranged, S-CSCF need order GGSN to send this user's Content of communciation to listening center by P-CSCF, and when listening center issued snoop command for P-CSCF among the CSCF, P-CSCF can direct command GGSN sends this user's Content of communciation to listening center.
After step 205:GGSN receives the order of CSCF,,, and will send to listening center after the user communication content replication with this PDP context dependent event information notice listening center according to the listening center address in the order.
From said process as can be seen, listening center issues the snoop command that contains the intercepted user sign to CSCF, CSCF monitors intercepted user in real time and identifies pairing user side and whether carrying out IP multimedia service dependent event or communication, if carrying out the IP multimedia service dependent event, then CSCF is with multimedia service chain of command dependent event information notice listening center; If carrying out communication, then CSCF order GGSN sends this user's Content of communciation to listening center, GGSN duplicates the communication data content of intercepted user afterwards, and according to the listening center address of containing in the order, with the dependent event information of user terminal and the intercepted user communication data content after duplicating send to listening center, finish user's the IP multimedia service dependent event and the monitoring of Content of communciation.
Claims (11)
1. one kind is carried out the system that IP multimedia service is monitored, and it is characterized in that this system comprises:
Listening center, issue to controlling call entity CSCF and to monitor IP multimedia service dependent event information or/and the snoop command of Content of Communication, receive the dependent event information of the IP multimedia service that Packet data service dependent event information that ggsn GGSN sends and user communication content and CSCF send; Comprise the intercepted user sign in the described snoop command;
CSCF is used to receive the snoop command that listening center issues, and according to intercepted user sign in the snoop command, detects the dependent event of the corresponding intercepted user of this sign and detected multimedia service chain of command dependent event is sent to listening center; The IP multimedia service communication of carrying out according to the snoop command monitoring users, and order GGSN sends to listening center with the Content of communciation that listens to;
GGSN receives the activation request from the packet data protocol content of user terminal, and the CSCF corresponding with the address information of CSCF in the binding information wherein carries out communication; Receive the snoop command that CSCF sends, duplicate the user communication content, and with packet data protocol content dependent event information and the user communication content after duplicating send listening center to.
2. system according to claim 1 is characterized in that, described CSCF is agent call State Control entity P-CSCF.
3. system according to claim 1 is characterized in that, described CSCF is the combination of P-CSCF and service call state controlled entity S-CSCF, and is connected by signaling interface between S-CSCF and the P-CSCF, wherein,
S-CSCF is used to receive the snoop command that listening center issues, and detects the dependent event of monitoring users and detected dependent event is sent to listening center according to snoop command; The IP multimedia service communication of carrying out according to the snoop command monitoring users, and send the order that the Content of communciation that listens to is sent to listening center to P-CSCF;
P-CSCF is used for sending to the order of listening center and carrying out communication with GGSN to the Content of communciation with listening to that GGSN forwarding S-CSCF sends.
4. system according to claim 1 is characterized in that, is signaling interface between listening center and the CSCF.
5. system according to claim 1 is characterized in that, is signaling interface and data-interface between listening center and the GGSN.
6. system according to claim 1 is characterized in that, is signaling interface between CSCF and the GGSN.
7. one kind is utilized the system of claim 1 to carry out the method that IP multimedia service is monitored, and it is characterized in that this method may further comprise the steps:
A. listening center issues the IP multimedia service dependent event of monitoring users and the snoop command of Content of communciation to CSCF, identifies comprising intercepted user;
B.CSCF monitors intercepted user in real time and identifies pairing user side and whether carrying out IP multimedia service dependent event or communication,
If carrying out IP multimedia service chain of command dependent event, then CSCF is with multimedia service chain of command dependent event information notice listening center;
If carrying out communication, then CSCF order GGSN sends this user's Content of communciation to listening center, wherein contains the listening center address; After GGSN receives this order, duplicate the communication data content of intercepted user, and according to the address of listening center, with the dependent event information of user terminal and the communication data content of the user after duplicating send to listening center.
8. method according to claim 7 is characterized in that, intercepted user described in the steps A is designated initial session protocol SIP sign, or the telephone number sign.
9. method according to claim 7 is characterized in that dependent event comprises described in the step B: register, go registration, SIP call signaling.
10. method according to claim 7 is characterized in that, when CSCF described in the steps A was S-CSCF, S-CSCF sent this user's Content of communciation among the step B to listening center by P-CSCF order GGSN.
11. method according to claim 7 is characterized in that, when CSCF described in the steps A was P-CSCF, P-CSCF was direct command GGSN sends a Content of communciation from this user to listening center among the step B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100010300A CN100397831C (en) | 2004-01-16 | 2004-01-16 | System and method for realizing IP multimedia business monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100010300A CN100397831C (en) | 2004-01-16 | 2004-01-16 | System and method for realizing IP multimedia business monitoring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1642115A CN1642115A (en) | 2005-07-20 |
| CN100397831C true CN100397831C (en) | 2008-06-25 |
Family
ID=34866984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100010300A Expired - Fee Related CN100397831C (en) | 2004-01-16 | 2004-01-16 | System and method for realizing IP multimedia business monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100397831C (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE394848T1 (en) * | 2005-10-25 | 2008-05-15 | Siemens Ag | METHOD AND NETWORK ELEMENTS FOR CONTENT DUPLICATION IN PACKET NETWORKS |
| CN1964266B (en) * | 2005-11-09 | 2011-08-17 | 朗迅科技公司 | IP multimedia subsystem gateway system and method able to check conversation status |
| CN100421409C (en) * | 2005-12-06 | 2008-09-24 | 华为技术有限公司 | Method for selecting service call conversation control function physical body |
| CN100414896C (en) * | 2005-12-13 | 2008-08-27 | 华为技术有限公司 | Method and system for down-link monitoring data |
| CN100450024C (en) * | 2005-12-13 | 2009-01-07 | 华为技术有限公司 | Method for monitoring multi-medium sub-system domain |
| CN100428700C (en) * | 2005-12-30 | 2008-10-22 | 华为技术有限公司 | Reporting method and system of using server, monitoring correlation event using it |
| CN101064644B (en) * | 2006-04-30 | 2011-04-20 | 华为技术有限公司 | Method and system for sensing state of user to perform IMS service and give notice |
| CN100459532C (en) * | 2006-05-26 | 2009-02-04 | 华为技术有限公司 | Method for implementing legal listening |
| CN101212351B (en) * | 2006-12-30 | 2011-05-25 | 中兴通讯股份有限公司 | User service tracking method for IMS network |
| WO2008086639A1 (en) * | 2006-12-30 | 2008-07-24 | Huawei Technologies Co., Ltd. | System for voice interception of video phone services in a multi-media network |
| CN101291233B (en) * | 2007-04-20 | 2011-04-20 | 华为技术有限公司 | Method and system realizing event detection |
| CN101222378B (en) * | 2007-07-26 | 2011-08-03 | 华为技术有限公司 | Monitoring method, system and device in IMS network |
| CN101247431B (en) * | 2008-03-14 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for implementing IP multimedia subsystem monitoring |
| CN101568091B (en) * | 2008-04-24 | 2011-02-02 | 华为技术有限公司 | Method, system and equipment for providing service |
| 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 |
| CA2745661C (en) | 2009-01-16 | 2011-11-29 | Neuralitic Systems | A method and system for subscriber base monitoring in ip data networks |
| CN101562810B (en) * | 2009-05-13 | 2011-12-07 | 中兴通讯股份有限公司 | Method and system for legally monitoring IP multimedia subsystem network |
| CN101605342B (en) * | 2009-07-01 | 2012-12-19 | 中兴通讯股份有限公司 | Method, system and device for monitoring communication contents in IMS network |
| CN102223356B (en) * | 2010-04-19 | 2015-06-03 | 中兴通讯股份有限公司 | Lawful interception system for media security of Internet protocol (IP) multimedia subsystem (IMS) based on key management server (KMS) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1192817A1 (en) * | 1999-07-12 | 2002-04-03 | Nokia Corporation | Access context management for macro-level mobility management registration in an access network |
| WO2003047162A2 (en) * | 2001-11-28 | 2003-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Policy co-ordination in a communications network |
| CN1451248A (en) * | 2000-08-25 | 2003-10-22 | 诺基亚公司 | Monitoring connection to user terminal in telecommuncations system |
| CN1454434A (en) * | 2000-10-09 | 2003-11-05 | 诺基亚公司 | Method and system for establishing a connection between network elements |
-
2004
- 2004-01-16 CN CNB2004100010300A patent/CN100397831C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1192817A1 (en) * | 1999-07-12 | 2002-04-03 | Nokia Corporation | Access context management for macro-level mobility management registration in an access network |
| CN1451248A (en) * | 2000-08-25 | 2003-10-22 | 诺基亚公司 | Monitoring connection to user terminal in telecommuncations system |
| CN1454434A (en) * | 2000-10-09 | 2003-11-05 | 诺基亚公司 | Method and system for establishing a connection between network elements |
| WO2003047162A2 (en) * | 2001-11-28 | 2003-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Policy co-ordination in a communications network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1642115A (en) | 2005-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100397831C (en) | System and method for realizing IP multimedia business monitoring | |
| CN101069442B (en) | Presence management in packet-switched networks using circuit-switched USSD signalling | |
| EP1393588B1 (en) | Packet mode speech communication | |
| US8576878B2 (en) | Method for controlling parties in real-time data communication | |
| US7408948B2 (en) | Packet mode speech communication | |
| JP4001813B2 (en) | Monitoring connections to user terminals in telecommunications systems | |
| KR100933121B1 (en) | Method and apparatus for processing CIS terminal call request of IMS terminal including real time service through IMS domain | |
| CN101568091B (en) | Method, system and equipment for providing service | |
| CN100384188C (en) | Method and system for realizing bidirectional alternative operation of circuit field and group field | |
| US7650159B2 (en) | Communication system | |
| WO2006055280A9 (en) | Method and apparatus for proving push-to-talk services to non-push-to-talk enabled networks | |
| CN102714873A (en) | Mobile communication method, call control node, priority control node, and mobile management node | |
| CN100495973C (en) | Method and device for push-to-talk service | |
| CN101517960A (en) | Method, system and device for application IMS communication service identification in communication system | |
| CN100493114C (en) | Method for implementing legal monitoring | |
| US8351899B2 (en) | Generation of charging information in group communications system | |
| JP2006320003A (en) | Connection set-up in communication system | |
| CN101141761A (en) | Monitoring method, system and device | |
| CN100455045C (en) | One-to-one communication | |
| CN100499467C (en) | Signalling loading billing method in multi-media subsystem | |
| CN100495988C (en) | The method for detecting the signaling bearer availability | |
| KR100907986B1 (en) | Communication systems | |
| CN101001444A (en) | Anonymous emergency session setting method | |
| CN100396025C (en) | Monitoring method, as well as device and system for collecting monitored data | |
| CN101217603B (en) | A device to transfer IP voice into TDM voice and corresponding snooping method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 Termination date: 20210116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |