WO2012048498A1

WO2012048498A1 - Method and system for implementing call waiting service intercepting in intelligent network

Info

Publication number: WO2012048498A1
Application number: PCT/CN2010/079825
Authority: WO
Inventors: 李刚; 王显光
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-10-13
Filing date: 2010-12-15
Publication date: 2012-04-19
Also published as: CN102448035A

Abstract

A method and system for implementing call waiting service intercepting in intelligent network are provided in the present invention. An SCP in the intelligent network sets numbers which needs to be intercepted the call waiting service; when a call of first speech channel in which the calling calls the called is initiated, conversation speech information of the first speech channel is intercepted; when a call of second speech channel in which third party calls the called is initiated, conversation speech information of the second speech channel is intercepted, and the third party is added to the ongoing first speech channel to wait for the call; when the called is switching between the first speech channel and the second speech channel, opposite end media of the called and service type of the intercepting are updated, and the speech channel switching is implemented. The present invention is based on application of wide band intelligent network system, every network element performs switching of intercepted speech channels under the control of SCP, intercepting the call waiting service can be implemented without adding other network elements, and it is of great advantage to promote complex services.

Description

Method and system for implementing call waiting service monitoring by intelligent network

The present invention relates to data communication technologies, and in particular, to a method and system for implementing call waiting service monitoring using a broadband intelligent network. Background technique

In the current data communication field, in order to realize the monitoring of the intelligent network call, the Chinese patent application 200710187476.0 proposes a method for realizing intelligent network call monitoring, as shown in FIG. 1 , the method controls the service to the intelligent network through the monitoring center. The point initiates the number setting control. When the number call triggers the intelligent network service, the service control point checks whether the number is set. If it is a controlled number, the interception information is sent in the connection signaling sent to the service switching point, and the service switching point is monitored according to the monitoring. The information connects the voice channel to the monitoring center, and the monitoring center connects the voice channel to the real called party. Thus, by setting the monitoring center as the listening network element in the voice channel, the function of monitoring the voice channel is realized.

The method carries the interception information in the connection signaling sent by the service control point to the service switching point, so that the service switching point can add the interception network element to the voice channel through the information, and the method is simple and flexible. The network changes are small, which greatly reduces the cost of network transformation. It can be realized only by adding links between the service switching point and the listening network element.

Although this method can realize the monitoring of ordinary calls, there are certain problems for the call waiting service. First, the ordinary call only carries the interception information to the service switching point in the connection signaling. The service switching point does not perform other processing after the interception network element joins the voice channel through the connection signaling, but for the call waiting service, the user can The control session is continuously switched. If the subsequent processing is not performed, the listening network element cannot be successfully added to the session, and the monitoring function cannot be implemented. Secondly, since there may be multiple numbers in the call waiting, it is no longer necessary for the user to listen to the respective call waiting numbers and switching states by merely carrying the numbers through the connection signaling. Cause Therefore, there is no solution in the prior art that can implement call waiting service monitoring in an intelligent network. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for implementing call waiting service monitoring by an intelligent network, which overcomes the defect that the call waiting service monitoring cannot be implemented in the intelligent network in the prior art.

In order to solve the above technical problem, the technical solution of the present invention is implemented as follows:

A method for implementing call waiting service monitoring by an intelligent network, comprising: setting, by a service control point SCP in an intelligent network, a number that needs to monitor a call waiting service; when the calling party calls a call of the first party of the called party Listening to the call voice information of the first session; when the third party calls the called party's second voice call, the call voice information of the second voice channel is monitored, and the third party is added to the first voice of the call. Call waiting; when the called party switches between the first session and the second session, the called party's peer media and the monitored service type are updated.

The SCP is configured to control the number of the call waiting service, and the SCP stores the number of the call waiting service to be sent to the SCP by using the control command, and the SCP stores the number that needs to be monitored by the call waiting service. Set control information.

When the number of the control information includes the calling party, the called party, and the third party, the calling party listens to the call voice information of the first voice channel when the calling party calls the called party's first voice channel, specifically Includes:

The calling party of the SCP sets the first monitoring branch information and sends the first monitoring branch information to the LIG through the X2 link. The SCP is re-triggered by the media gateway MSG, and the LIG is added to the calling media channel in the first session. Having the LIG listen to the call voice information of the first voice channel;

and / or,

The SCP sends the second interception branch information to the called party, and sends the second interception branch information to the LIG through the X2 link. The SCP is re-triggered by the MSG self-loop, and the LIG is added to the called media channel in the first session, so that the LIG is enabled. The call voice information of the first session is monitored. When the number of the control information includes the calling party, the called party, and the third party, the call voice information of the second session is monitored when the call of the second party calling the called party of the third party is initiated, specifically including :

The SCP generates a third interception branch information for the third party that controls the number, and/or generates a fourth interception branch information for the called party that controls the number, and sends the fourth interception branch information to the LIG through the X2 link;

The SCP is re-triggered by the MSG self-loop, and the LIG is added to the third-party media channel in the second session, so that the LIG listens to the voice information of the second session.

The adding a third party to the first session of the call to perform call waiting includes: the SCP, by using the inter-call instance communication operation of the first session and the second session, to send the third party call leg ID and the third party number from The call of the second session is delivered to the call of the first session, the call of the first session acquires the third party call leg ID and the third party number, and the third party call leg ID is added to the first session by using the call leg join call operation. Call, change the status of the second session to call hold.

The method of updating the called party's peer media and the monitored service type when the called party switches between the first session and the second session includes:

When the called party switches from the first voice channel to the second voice channel, the SCP notifies the LIG to change the state of the first voice channel to call hold through the X2 link, and changes the state of the second voice channel to call recovery, and the SCP. Notifying the service switching point SS to update the peer media of the called party to the third party media, and the SS notifying the LIG to update the peer media of the called party to the third party media;

When the called party switches from the second voice channel to the first voice channel, the SCP notifies the LIG to change the state of the first voice channel to call recovery through the X2 link, and changes the state of the second voice channel to call hold, and the SCP. The notification SS updates the peer media of the called party to the calling party media, and the SS notifies the LIG to update the peer media of the called party to the calling party media.

A system for implementing call waiting service monitoring by an intelligent network, comprising:

SCP, used to set the number of the number that needs to monitor the call waiting service; control the LIG to monitor the voice channel where the number of the control is located, and add the third party to the calling party that is in the call. Calling the first call of the party to perform call waiting, and implementing voice channel switching control;

LIG, used to control the call voice information of the first session when the calling party calls the called party's first voice channel under the control of the SCP; when the third party calls the called party's second voice channel When the call is initiated, the call voice information of the second session is monitored; when the user switches between the first session and the second session, the type of the monitored service and the peer media of the called party are updated;

The SS is configured to update the peer media of the called party when the user switches between the first session and the second session under the control of the SCP.

The SCP is further configured to monitor the voice information of the call by adding the LIG to the first voice channel and the second voice channel by means of the MSG self-ring re-triggering the SCP.

When the third party calls the called party that is in the call, the SCP is further configured to: use the first instance and the second session of the inter-call instance communication operation to move the third party call leg ID and the third party number from the second session The call is delivered to the call of the first session, the call of the first session acquires the third party call leg ID and the third party number, and the call to join the call operation using the call leg joins the third party call leg ID to the call of the first session, The status of the two-way path is changed to call hold.

When the called party switches between the first session and the second session, the SCP is further configured to: when the called party switches from the first session to the second session, notify the LIG via the X2 link The status of the voice channel is changed to call hold, the state of the second voice channel is changed to call recovery, and the SS is notified to update the peer media of the called party to third party media;

When the called party switches from the second session to the first session, the LI2 is notified by the X2 link to change the state of the first session to call recovery, change the state of the second session to call hold, and notify the SS. The peer media of the called party is updated to the calling party media.

With the above technical solution, the present invention has at least the following advantages:

The method and system for implementing the call waiting service monitoring by the intelligent network according to the present invention, based on the application of the broadband intelligent network system, each network element performs the switching of the interception voice channel under the control of the SCP, and can implement call waiting without adding other network elements. The monitoring of the business is very conducive to the promotion of complex business. DRAWINGS

FIG. 1 is a signaling flowchart of implementing intelligent network call monitoring in the prior art;

2 is a schematic diagram of an X2 link signaling for an intelligent network to implement call waiting service monitoring according to a first embodiment of the present invention;

3 is a schematic diagram of a process of performing a relay self-loop on a MSG and adding a LIG to a voice channel according to an embodiment of the present invention;

4 is a schematic diagram of setting a monitoring branch point in the first embodiment of the present invention;

FIG. 5 is a schematic diagram of setting a monitoring branch point in a second embodiment of the present invention; FIG.

6 is a schematic diagram of setting a monitoring branch point in a third embodiment of the present invention;

7 is a schematic diagram of setting a monitoring branch point in a fourth embodiment of the present invention;

FIG. 8 is a schematic diagram showing the setting of the monitoring branch point in the fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings and preferred embodiments.

The intelligent network of the present invention implements a technical solution for call waiting service monitoring, and does not need to add special equipment, and utilizes a service control point (SCP, Service Control Point) and a service switching point (SS, Service Switching Point) of the existing broadband intelligent network system. ), Media Server (MS, Media Server), Media Gateway (MSG, Message Gateway), cooperate with the LIG (Liange Interception Gateway), and increase the communication link between the intelligent network and the LIG-X2 link. The SCP in the intelligent network service communicates with the LIG through the X2 link to report all the numbers to the LIG. The LIG associates the number information with the connection initiated session information according to the relevant unique identifier, and displays the complete number and words to the user. Road monitoring content.

The basic functions related to the network element and its completion in the implementation of the present invention are as follows: SS: Responsible for call access and trigger to the SCP, and is responsible for the call operation requested by the SCP, and forwarding the SCP invite, update, bye, etc. Interact with LIG to achieve the voice path Monitor function.

SCP: is the core component of the intelligent network, storing user data and business logic; the main function of the SCP is to receive trigger messages from the SS, process the listening logic and control, send and update the channel monitoring information to the SS, and pass the X2 link to the LIG. Report the listening number and monitor the service information.

MSG: is the media channel of the call.

MS: Media that forwards and processes the session.

LIG: The function of monitoring is implemented, receiving the signaling processing session monitoring from the SS, receiving the signaling processing interception number sent by the SCP through the X2 link, and displaying the two together to the user or reporting to the upper listening interface. Show it.

The following several embodiments take a specific call process as an example: Caller A calls the called party B, the called party B answers, the third party C calls the called party B, and the call waits. The voice channel between the calling party A and the called party B is called the first voice channel, and the voice channel between the third party C and the called party B is called the second voice channel.

According to a first embodiment of the present invention, a method for implementing call waiting service monitoring by an intelligent network includes the following specific steps:

Step 101: The LIG sends a control command to the SCP to set the number of the calling party A, the called party B, and the third party C. The SCP stores the setting information of the calling number, the called number, and the third party number. The number of the control has a call waiting function.

Step 102: The calling party A calls the called party B to trigger the SCP, and the SCP determines whether the calling number is controlled. If yes, the process proceeds to step 103. Otherwise, the normal call processing is performed, and the process ends.

Step 103: The SCP generates first listening branch information CIN1 of the calling number, where the first identifier cin1, the calling number, the called number, the called ringing information, the service type, and the like are sent, and the Begin message is sent on the X2 link. The CIN1 is reported to the LIG, as shown in the signaling (1) in FIG. 2, and the SCP is re-triggered by the MSG self-loop, and the LIG is added to the calling media channel in the first session, so that the LIG is on the first session. The call voice information is monitored. Listening branch information usually includes identification, The calling number, the called number, the waiting number, the called ringing time information, the called response time, and the service type can be deleted and updated according to the needs of the steps in this embodiment.

In this step, the self-loop on the MSG means that the trunk of the outgoing trunk port of the MSG is directly connected to the inbound trunk port of the MSG. The SCP re-triggers the SCP through the MSG, and adds the LIG to the calling media channel in the first session, so that the LIG listens to the voice information of the first session. As shown in FIG. 3, the following process is specifically included:

Step A: After adding a special prefix to the called number in CIN1, the SCP sends the invite signaling carrying CIN1 to the SS.

Step A2, the SS sends the invite signaling to the LIG.

In step A3, the LIG returns its media address to the SS. The SS adds the LIG to the first interception branch point, that is, the media address of the calling party and the MS according to the media address of the LIG, and the LIG is connected to the MS through the MSG, and the LIG is According to cinl, the calling number and the called number are associated with the first voice channel, and the call voice information of the first voice channel is monitored at the first monitoring branch point, and the location of the first listening branch point is as shown in FIG. 4 Shown. Media addresses include: IP address and port number.

Step A4: After the SS removes the special prefix of the called number in CIN1, the SS sends the invite signaling carrying CIN1 to the MSG.

Step A5: After the MSG performs the relay self-loop, the invite signaling is sent to the SS.

In step A6, the SS triggers the SCP again according to the called number to perform subsequent call processing. Step 104: The SCP is triggered again by the loopback, and the SCP generates the second interception branch information CIN2 of the called number, including the second identifier cin2, the calling number, the called number, the called ringing information, the service type, and the like. Sending the Beginning signaling on the X2 link sends the second interception branch information CIN2 to the LIG, as shown in the signaling (2) in Figure 2, and re-triggers the SCP through the MSG self-loop, and adds the LIG to the first session. The called media channel, so that the LIG listens to the call voice information of the first session.

In this step, the principle of the MSG self-loop is the same as the principle of A1~A6 in step 103. SCP The SCP is re-triggered by the MSG, and the LIG is added to the called media channel in the first session, so that the LIG listens to the voice information of the first session, including the following process:

Step Bl, the SCP adds a special prefix to the called number in CIN2, and sends the invite signaling carrying CIN2 to the SS.

Step B2, the SS sends the invite signaling to the LIG.

Step B3, the LIG returns its media address to the SS, and the SS adds the LIG to the second interception branch point, that is, the media address of the calling party and the MS according to the media address of the LIG, and the LIG dials the calling number and the called party according to cin2. The number is associated with the first voice channel, and the call voice information of the first voice channel is monitored at the second interception branch point, and the location of the second interception branch point is as shown in FIG. 4 .

Step B4: After the SS removes the special prefix of the called number in the CIN2, the SS sends the invite signaling carrying the CIN2 to the MSG.

Step B5: After the MSG performs the relay self-loop, the invite signaling is sent to the SS.

In step B6, the SS triggers the SCP again according to the called number to perform subsequent call processing.

Step 105, the called number rings, and the SCP updates the called ringing time information of CIN1 and CIN2.

Step 106: The called number is answered, and the SCP reports the CIN1 and CIN2 Answer signaling to the LIG through the X2 link, as shown in the signaling (3) and (4) in FIG.

Step 107: The third party C calls the called party B to trigger the SCP, and the SCP determines whether the called number is in the middle of the call and sets the control. If yes, step 108 is performed; otherwise, the normal call processing is performed, and the process ends;

Step 108: The SCP generates third interception branch information CIN3 of the third party number, including the third identifier cin3, the third party number, the called number, the called response time, the service type, and the like, by sending the Begin signaling on the X2 link. Report CIN3 to LIG, as shown in Figure 2 (5). Regenerating the fourth interception branch information CIN4 of the called number, including the fourth identifier cin4, the third party number, the called number, the called response time, the service type, etc., by sending on the X2 link The Begin signaling reports the CIN4 to the LIG. As shown in Figure 2, the SCP re-triggers the SCP through the MSG. The LIG is added to the third-party media channel in the second session to make the LIG pair. The voice information of the call of the voice channel is monitored. In the technical field, when the monitoring function is turned on for a number, it means that the call voice information of the number is monitored in the used voice channel in which the number participates, so the CIN2 generated by the called number of the number setting control is performed. CIN4 exists at the same time or does not exist at the same time.

In this step, the principle of the MSG self-loop is the same as the principle of A1~A6 in step 103. The SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the third-party media channel in the second session to monitor the voice information of the second session, including the following process:

Step CI: After adding the special prefix to the called number in CIN3 and CIN4, the SCP sends the invite signaling carrying CIN3 and CIN4 to the SS.

Step C2, the SS sends the invite signaling to the LIG.

Step C3, the LIG returns its media address to the SS, and the SS adds the LIG to the third interception branch point and the fourth interception branch point, that is, the third-party media address and the MSG according to the media address of the LIG, and the LIG passes the MSG and The MS is connected, and the LIG associates the calling number and the called number with the second voice channel according to cin3 and cin4, and monitors the voice information of the second voice channel at the third monitoring branch point and the fourth monitoring branch point. The positions of the third listening branch point and the fourth listening branch point are as shown in FIG. 4.

Step C4: After removing the special prefix of the called number in CIN3 and CIN4, the SS sends the invite signaling carrying CIN3 and CIN4 to the MSG.

Step C5: After the MSG performs the relay self-loop, the invite signaling is sent to the SS.

In step C6, the SS triggers the SCP again according to the called number to perform subsequent call processing. Step 109: The SCP is triggered again by the loopback, and the SCP will transmit the third party call leg ID and the third party number from the second session through the inter-call instance communication operation of the first session and the second session. One-way call, the first voice call gets the third-party call leg ID and the third The party number is added to the call operation by using the call leg. The third party call leg ID is added to the call of the first session, and the call of the second session is released. The SCP changes the service type of CIN3 and CIN4 to call waiting, and reports the message through the X2 link. The service type updates the Service signaling to the LIG. As shown in Figure 2, the signaling (7) and the step 110, the called party B user presses the * key. The SCP determines that it is the first time to switch to the third party C call, and then sends the message to the SS. Update signaling updates the peer media of the called party to a third-party media, and the SS sends update signaling to the LIG to update the peer media of the called party as a third-party media;

The SCP then reports the CIN3 and CIN4 response Answer signaling to the LIG through the X2 link, as shown in the signaling (9), (10) in Figure 2, and the LIG updates the called response time in CIN3 and CIN4;

The SCP updates the service types of CIN3 and CIN4 respectively to call recovery, and updates the Service signaling to the LIG through the X2 link reporting service type, such as signaling (11) and (12) in Figure 2; SCP updates the services of CIN1 and CIN2 respectively. The type is call hold, and the Service Type Update Service Signal is sent to the LIG through the X2 link, as shown in Figure 2 (13), (14).

Step 111: The called party B user presses the * key again, and the SCP determines that the call is switched with the calling party A, and the service types of CIN1 and CIN2 are respectively updated to call recovery, and the service type update service signaling is reported through the X2 link. For LIG, as shown in Figure 2 (15), (16); SCP updates the service type of CIN3 and CIN4 respectively to call hold, and updates the Service signal to LIG through the X2 link reporting service type, as shown in Figure 2 Signaling (17), (18); and so on.

Step 112, the call ends, the SCP sends a bye signaling to the SS to release the calling party A, the called party B, and the third party C call leg, and the SS sends the bye signaling to the LIG to end the session monitoring; the SCP sends the CIN1 through the X2 link. , CIN2, CIN3, and CIN4 release Release signaling, releasing the interception, as shown in Figure 2 (19), (20), (21), (22).

The second embodiment of the present invention is substantially the same as the first embodiment except that the number of monitoring branch points set in the first session is different because the first listening branch point and the second listening branch point are generated for different user numbers. , but they are all listening to the voice information of the first voice channel. Therefore, this embodiment is only added to the first listening branch point or the second monitoring branch point in the first session.

The object of the invention can also be achieved by LIG. For example, if the second monitoring branch point in the first session is added to the LIG as an example, the setting of the monitoring branch point is as shown in FIG. 5.

A method for implementing call waiting service monitoring by an intelligent network includes the following specific steps: Step 201: The LIG sends a control command to the SCP to set the number of the calling party A, the called party B, and the third party C, and the SCP stores the master. Control information for the number, called number, and third party number. The number of the control has a call waiting function.

Step 202: The calling party A calls the called party B to trigger the SCP, and the SCP determines whether the calling number is controlled. If yes, the process proceeds to step 203. Otherwise, the normal call processing is performed, and the process ends.

Step 203: The SCP generates a second interception branch information CIN2 of the called number, where the second identifier cin2, the calling number, the called number, the called ringing information, the service type, etc.

Sending the Begin signaling on the X2 link to report the CIN2 to the LIG and re-trigger through the MSG self-loop.

The SCP adds the LIG to the second intercept branch point in the first session, so that the LIG listens to the call voice information of the first session.

Step 204: The called number rings, and the SCP updates the called ringing time information of CIN2.

Step 205: The called number is answered, and the SCP reports the CIN2 Answer signaling to the LIG through the X2 link.

Step 206: The third party C calls the called party B to trigger the SCP, and the SCP determines whether the called number is in the middle of the call and sets the control. If yes, step 207 is performed; otherwise, the normal call processing is performed, and the process ends;

Step 207: The SCP generates third interception branch information CIN3 of the third party number, including the third identifier cin3, the third party number, the called number, the called response time, the service type, and the like, by sending the Begin signaling on the X2 link. Report CIN3 to LIG. Regenerating the fourth interception branch information CIN4 of the called number, including the fourth identifier cin4, the third party number, the called number, the called response time, the service type, etc., by sending the Begin signaling on the X2 link to the CIN4 Reported to the LIG, the SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the third listening branch point and the fourth monitoring branch point in the second session, so that the LIG listens to the call voice information of the second session. .

Step 208: The SCP is triggered again by the loopback, and the SCP will transmit the third-party call leg ID and the third-party number from the second session to the first call through the inter-call instance communication operation of the first session and the second session. The call of the road, the call of the first session acquires the third party call leg ID and the third party number, uses the call leg join call operation to add the third party call leg ID to the call of the first session, and releases the call of the second session, The SCP changes the service type of CIN3 and CIN4 to call waiting, and reports the service type update service signaling to the LIG through the X2 link.

Step 209, the called party B user presses the * key, and the SCP determines that it is the first time to switch to the third party C call, then sends update signaling to the SS to update the called party's peer media as a third party media, and the SS sends the message to the LIG. The update signaling updates the peer media of the called party to a third party media;

The SCP then reports the response of CIN3 and CIN4 to the LIG through the X2 link, and the LIG updates the called response time in CIN3 and CIN4.

The SCP updates the service types of CIN3 and CIN4 respectively to call recovery, and updates the service signaling to the LIG through the X2 link reporting service type. The service type of the SCP update CIN2 is call hold, and the service type update service signaling is sent to the LIG through the X2 link. .

Step 210: The called party B user presses the * key again, and the SCP determines that the call is switched with the calling party A, and the service type of the CIN2 is updated to call recovery, and the service type update service signaling is sent to the LIG through the X2 link; The SCP updates the service types of CIN3 and CIN4 to call hold, and updates the service signaling to the LIG through the X2 link reporting service type; and so on.

Step 211: The call ends. The SCP sends the bye signaling to the SS to release the calling party A, the called party B, and the third party C. The SS sends the bye signaling to the LIG to end the session monitoring. The SCP sends the CIN2 through the X2 link. Release of Release signaling by CIN3 and CIN4, releasing the listener.

The third embodiment of the present invention is substantially the same as the first embodiment except that it is in the second session. The number of the monitoring branch points is different, because the third listening branch point and the fourth monitoring branch point are generated for different user numbers, but the call voice information of the second session is monitored, so this embodiment is only Joining the third listening branch point or the fourth monitoring branch point in the second session

The object of the invention can also be achieved by LIG. For example, if the fourth monitoring branch point in the second session is added to the LIG, the setting of the monitoring branch point is as shown in FIG. 6.

A method for implementing call waiting service monitoring by an intelligent network includes the following specific steps: Step 301: The LIG sends a control command to the SCP to set the number of the calling party A, the called party B, and the third party C, and the SCP stores the master. Control information for the number, called number, and third party number. The number of the control has a call waiting function.

Step 302: The calling party A calls the called party B to trigger the SCP, and the SCP determines whether the calling number is controlled. If yes, the process proceeds to step 303. Otherwise, the normal call processing is performed, and the process ends.

Step 303: The SCP generates a first interception branch information CIN1 of the calling number, where the first identifier cin1, the calling number, the called number, the called ringing information, the service type, and the like are sent by sending the Begin message on the X2 link. The CIN1 is reported to the LIG, and the SCP is re-triggered by the MSG self-loop, and the LIG is added to the first listening branch point in the first session, so that the LIG listens to the call voice information of the first session.

Step 304: The SCP is triggered again by the loopback, and the SCP generates the second interception branch information CIN2 of the called number, including the second identifier cin2, the calling number, the called number, the called ringing information, the service type, and the like. Sending the Beginning signaling on the X2 link, the CIN2 is reported to the LIG, and the SCP is re-triggered by the MSG. The LIG is added to the second interception branch point in the first session to enable the LIG to talk to the first session. Voice information is monitored.

Step 305, the called number rings, and the SCP updates the called ringing time information of CIN1 and CIN2.

Step 306, the called number is answered, and the SCP reports the Answer signaling of CIN1 and CIN2 to the LIG through the X2 link. Step 307: The third party C calls the called party B to trigger the SCP, and the SCP determines whether the called number is in the middle of the call and sets the control. If yes, step 308 is performed; otherwise, the normal call processing is performed, and the process ends;

Step 308, the SCP generates fourth listening branch information CIN4 of the called number, including the fourth identifier cin4, the third party number, the called number, the called response time, the service type, and the like, by sending the Begin signaling on the X2 link. The CIN4 is reported to the LIG, and the SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the fourth monitoring branch point in the second session, so that the LIG listens to the call voice information of the second session.

Step 309, the SCP is triggered again by the loopback, and the SCP will transmit the third party call leg ID and the third party number from the second session to the first call through the inter-call instance communication operation of the first session and the second session. The call of the road, the call of the first session acquires the third party call leg ID and the third party number, uses the call leg join call operation to add the third party call leg ID to the call of the first session, and releases the call of the second session, The SCP changes the service type of the CIN4 to the call waiting, and reports the service type update service signaling to the LIG through the X2 link.

Step 310: The called party B user presses the * key, and the SCP determines that it is the first time to switch to the third party C call, and sends update signaling to the SS to update the called party's peer media as a third party media, and the SS sends the message to the LIG. The update signaling updates the peer media of the called party to a third party media;

The SCP then reports the CIN4 response via the X2 link. The answer signaling is sent to the LIG, and the LIG updates the called response time in the CIN4.

The service type of the SCP update CIN4 is call recovery, and the service type update service signaling is sent to the LIG through the X2 link; the SCP updates the service types of the CIN 1 and CIN2 respectively to call hold, and the service type update service signaling is reported by the X2 link. LIG.

Step 311: The called party B user presses the * key again, and the SCP determines that the call is switched with the calling party A, and the service types of CIN1 and CIN2 are respectively updated for call recovery, and the service type update service signaling is reported by the X2 link. For LIG; SCP updates CIN4's service type to call protection Hold, report the service type update service signaling to the LIG through the X2 link; and so on.

Step 312, the call ends, the SCP sends a bye signaling to the SS to release the calling party A, the called party B, and the third party C call leg, and the SS sends the bye signaling to the LIG to end the session monitoring; the SCP sends the CIN1 through the X2 link. Release the Release signaling by CIN2 and CIN4 to release the listener.

The fourth embodiment of the present invention is substantially the same as the third embodiment, except that the LIG is not set at the first interception branch point of the first session, and the first session is performed only by setting the LIG at the second interception branch point. Monitoring, the LIG is set at the fourth monitoring branch point to monitor the second session, and the object of the present invention can be achieved. The setting of the monitoring branch point is shown in Figure 7.

A method for implementing call waiting service monitoring by an intelligent network includes the following specific steps: Step 401: The LIG sends a control command to the SCP to set the number of the calling party A, the called party B, and the third party C, and the SCP stores the master. Control information for the number, called number, and third party number. The number of the control has a call waiting function.

Step 402: The calling party A calls the called party B to trigger the SCP, and the SCP determines whether the calling number is controlled. If yes, the process proceeds to step 403. Otherwise, the normal call processing is performed, and the process ends.

Step 403: The SCP generates a second interception branch information CIN2 of the called number, where the second identifier cin2, the calling number, the called number, the called ringing information, the service type, etc.

Step 404: The called number rings, and the SCP updates the called ringing time information of CIN2.

Step 405: The called number is answered, and the SCP reports the CIN2 Answer signaling to the LIG through the X2 link.

Step 406: The third party C calls the called party B to trigger the SCP, and the SCP determines whether the called number is in the middle of the call and sets the control. If yes, step 407 is performed; otherwise, the normal call processing is performed, and the process ends; Step 407: The SCP generates fourth listening branch information CIN4 of the called number, where the fourth identifier cin4, the third party number, the called number, the called response time, the service type, and the like are sent, and the Begin signaling is sent on the X2 link. The CIN4 is reported to the LIG, and the SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the fourth interception branch point in the second session, so that the LIG listens to the call voice information of the second session.

Step 408: The SCP is triggered again by the loopback, and the SCP will transmit the third-party call leg ID and the third-party number from the second session to the first call through the inter-call instance communication operation of the first session and the second session. The call of the road, the call of the first session acquires the third party call leg ID and the third party number, uses the call leg join call operation to add the third party call leg ID to the call of the first session, and releases the call of the second session, The SCP changes the service type of the CIN4 to the call waiting, and reports the service type update service signaling to the LIG through the X2 link.

Step 409, the called party B user presses the * key, and the SCP determines that it is the first time to switch to the third party C call, then sends update signaling to the SS to update the called party's peer media as a third party media, and the SS sends the message to the LIG. The update signaling updates the peer media of the called party to a third party media;

The SCP updates the service type of the CIN4 to call recovery, and the service type is updated by the X2 link to update the service signaling to the LIG. The SCP updates the service type of the CIN2 to call hold, and reports the service type update service signaling to the LIG through the X2 link.

Step 410, the called party B user presses the * key again, the SCP determines that the call is a call with the calling party A, and the service type of the CIN2 is updated to call recovery, and the service type update service signaling is sent to the LIG through the X2 link; The SCP updates the service type of the CIN4 to call hold, and updates the Service signaling to the LIG through the X2 link reporting service type; and so on.

Step 411, the call ends, the SCP sends a bye signaling to the SS to release the calling party A, the called party B, and the third party C call leg, and the SS sends the bye signaling to the LIG to end the session monitoring; the SCP passes The X2 link sends Release Release signaling for CIN2 and CIN4, releasing the interception.

According to the fifth embodiment of the present invention, the first session is monitored only by the LIG at the first interception branch point, and the second session is monitored at the third interception branch point, thereby achieving the object of the present invention. The setting of the listening branch point is shown in Figure 8.

A method for implementing call waiting service monitoring by an intelligent network includes the following specific steps: Step 501: The LIG sends a control command to the SCP to set the number of the calling party A, the called party B, and the third party C, and the SCP stores the master. Control information for the number, called number, and third party number. The number of the control has a call waiting function.

Step 502: The calling party A calls the called party B to trigger the SCP, and the SCP determines whether the calling number is controlled. If yes, the process proceeds to step 503. Otherwise, the normal call processing is performed, and the process ends.

Step 503: The SCP generates a first interception branch information CIN1 of the calling number, which includes a first identifier cinl, a calling number, a called number, a called ringing information, a service type, and the like,

Sending the Begin signaling on the X2 link to report the CIN1 to the LIG and re-trigger through the MSG self-loop.

The SCP adds the LIG to the first listening branch point in the first session, so that the LIG listens to the call voice information of the first session.

Step 504: The called number rings, and the SCP updates the called ringing time information of CIN1.

Step 505: The called number is answered, and the SCP reports the CIN1 Answer signaling to the LIG through the X2 link.

Step 506: The third party C calls the called party B to trigger the SCP, and the SCP determines whether the called number is in the middle of the call and sets the control. If yes, step 507 is performed; otherwise, the normal call processing is performed, and the process ends;

Step 507: The SCP generates third interception branch information CIN3 of the third party number, including the third identifier cin3, the third party number, the called number, the called response time, the service type, and the like, by sending the Begin signaling on the X2 link. The CIN3 is reported to the LIG, and the SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the third interception branch point in the second session, so that the LIG is enabled. The call voice information of the second session is monitored.

Step 508: The SCP is triggered again by the loopback, and the SCP will transmit the third-party call leg ID and the third-party number from the second session to the first call through the inter-call instance communication operation of the first session and the second session. The call of the road, the call of the first session acquires the third party call leg ID and the third party number, uses the call leg join call operation to add the third party call leg ID to the call of the first session, and releases the call of the second session, The SCP changes the service type of the CIN3 to call waiting, and reports the service type update service signaling to the LIG through the X2 link.

Step 509, the called party B user presses the * key, and the SCP determines that it is the first time to switch to the third party C call, then sends update signaling to the SS to update the called party's peer media as a third party media, and the SS sends the message to the LIG. The update signaling updates the peer media of the called party to a third party media;

The SCP then reports the response of CIN3 through the X2 link to the LIG, and the LIG updates the called response time in CIN3.

The service type of the SCP update CIN3 is call recovery, and the service type is updated by the X2 link to update the service signal to the LIG. The service type of the SCP update CIN1 is call hold, and the service type update service signaling is sent to the LIG through the X2 link.

In step 510, the called party B user presses the * key again, and the SCP determines that the call is forwarded to the calling party A, and the service type of the CIN1 is updated to call recovery, and the service type update service signaling is sent to the LIG through the X2 link; The SCP updates the service type of the CIN3 to call hold, and updates the Service signaling to the LIG through the X2 link reporting service type; and so on.

Step 511, the call ends, the SCP sends a bye signaling to the SS to release the calling party A, the called party B, and the third party C call leg, and the SS sends the bye signaling to the LIG to end the session monitoring; the SCP sends the CIN1 through the X2 link. Release the Release signaling with CIN3 and release the listener.

A sixth embodiment of the present invention provides a system for implementing call waiting service monitoring by an intelligent network, including:

1) The SCP is used to set the number of the number that needs to monitor the call waiting service, and set the calling party, the called party and the third party to control the number; control the LIG to perform the voice path of the set number Monitoring, adding a third party to the calling party of the calling party to call the called party's first voice channel to perform call waiting, and implementing voice channel switching control;

Specifically, the SCP re-triggers the SCP through the MSG self-loop, and adds the LIG to the voice channel where the number of the control is located, so that the LIG listens to the voice information of the call.

When the third party calls the called party that is on the call, the SCP is further used to call the third party call leg ID and the third party number from the second session through the inter-call instance communication operation of the first session and the second session. The call delivered to the first session, the call of the first session acquires the third party call leg ID and the third party number, and uses the call leg join call operation to add the third party call leg ID to the call of the first session, the second call The status of the road changes to call hold.

Specifically, when the called party switches between the first session and the second session, the SCP is further used to:

When the called party switches from the first session to the second session, the LI2 is notified by the X2 link to change the state of the first session to call hold, change the state of the second session to call recovery, and notify the SS. Update the peer media of the called party to third-party media;

2) LIG, used to listen to the call voice information of the first session when the calling party initiates the call of the first party of the called party under the control of the SCP; When the call of the session is initiated, the call voice information of the second session is monitored; when the user switches between the first session and the second session, the type of the monitored service and the peer media of the called party are updated;

3) SS, used to update the called party's peer media when the user switches between the first session and the second session under the control of the SCP.

By using the technical solution of the invention, the call waiting service monitoring is implemented based on the intelligent network, and no additional network element is needed, which is very beneficial to the promotion of complex services. The technical means and functions of the present invention for achieving the intended purpose can be more deeply and specifically understood by the description of the specific embodiments. However, the accompanying drawings are only for the purpose of reference and description, and are not intended to be Limit it.

Claims

Claim

A method for implementing call waiting service monitoring by an intelligent network, which is characterized in that: the service control point SCP in the intelligent network controls a number that needs to monitor a call waiting service;

When the calling party calls the call of the called party's first voice channel, the call voice information of the first voice channel is monitored;

When the third party calls the call of the second party of the called party, the voice information of the second session is monitored, and the third party is added to the first session of the call to perform call waiting;

When the called party switches between the first session and the second session, the called party's peer media and the monitored service type are updated.

The method according to claim 1, wherein the SCP performs control on a number that needs to monitor a call waiting service, and specifically includes:

The monitoring network element LIG sends the number of the call waiting service monitoring to the SCP by setting a control command, and the SCP stores the setting control information of the number that needs to perform the call waiting service monitoring.

The method according to claim 1, wherein when the number of the control information includes a calling party, a called party, and a third party, the calling party calls the called party's first voice channel. The call voice information of the first session is monitored when the call is initiated, and includes:

and / or,

The SCP sends the second interception branch information to the called party, and sends the second interception branch information to the LIG through the X2 link. The SCP is re-triggered by the MSG self-loop, and the LIG is added to the called media channel in the first session, so that the LIG is enabled. The call voice information of the first session is monitored.

4. The method according to claim 1, 2 or 3, characterized in that said setting information When the number includes the calling party, the called party, and the third party, the call voice information of the second session is monitored when the third party calls the call of the second party of the called party, including:

The method according to claim 1, 2 or 3, wherein the adding a third party to the first session of the call for call waiting comprises:

The SCP transmits the third party call leg identification code ID and the third party number from the call of the second session to the call of the first session through the inter-call inter-information communication operation of the first session and the second session, the first session The call acquires the third party call leg ID and the third party number, and uses the call leg join call operation to add the third party call leg ID to the call of the first session, and changes the state of the second session to call hold.

The method according to claim 1, 2 or 3, wherein the called party updates the called party's peer media and the monitored service when the called party switches between the first session and the second session. Type, specifically including:

A system for implementing call waiting service monitoring by an intelligent network, comprising: an SCP, configured to control a number that needs to monitor a call waiting service; and control a LIG pair setting The voice channel where the controlled number is located is monitored, and the third party is added to the calling party of the calling party to call the called party's first voice channel to perform call waiting, and the voice channel switching control is implemented;

The system according to claim 7, wherein the SCP is further configured to add the LIG to the first voice channel and the second voice channel to call voice information by means of the MSG self-ringing to re-trigger the SCP. Monitor.

The system according to claim 7, wherein when the third party calls the called party that is in the call, the SCP is further used to perform an inter-call instance communication operation by using the first session and the second session. Passing the third party call leg ID and the third party number from the call of the second session to the call of the first session, the call of the first session acquires the third party call leg ID and the third party number, and using the call leg to join the call operation will The third party call leg ID joins the call of the first session, and changes the state of the second session to call hold.

10. The system of claim 7, 8 or 9, wherein the SCP is further used when: the called party switches between the first session and the second session: