RU2675784C1 - System and method for controlled disconnection of the call at the end of the maximum talk time for sending the caller to the value-added services protocols intelligent call management (cap/isup) and session establishment (sip) - Google Patents

Abstract

FIELD: electrical communication engineering.SUBSTANCE: invention relates to the field of communication, in particular, to routing an established connection of subscribers to additional types of service (value added services), and can be used in CDMA, GSM, UMTS, LTE networks. Proposed system and methods for controlled disconnection and rerouting of the calling subscriber are implemented by creating additional signaling interactions between the network switching node and the additional media platform using intelligent call control protocols (CAP/ISUP) and session establishment (SIP).EFFECT: technical result is to provide reliable controlled rerouting of the established connection to additional types of service after the maximum allowable talk time has expired using the main protocols of the signaling communication establishment without disconnecting the connection for the calling subscriber.6 cl, 6 dwg

Description

The invention relates to the field of telephone communications, in particular, to methods for routing subscribers to additional VAS-value added services and can be used in CDMA, GSM, UMTS, LTE networks.

The task of monitoring the connection and forwarding and / or notification of subscribers at different levels of solvency is one of the key for operators of mobile networks of SPS. There are enough known devices and methods aimed at solving this problem. There are various methods of notifying about a call and the necessity of forwarding a call from an insolvent subscriber, in which it is necessary to dial a certain predetermined sequence of numbers and symbols. Or, for example, the Informer service of the TELE2 SPS operator sends an outgoing call to the calling subscriber with insufficient balance that the called subscriber will be notified of the call. And the autoinformer indicates that there are not enough funds on the account to make a call. The called subscriber receives an SMS message with the text: “The subscriber called you. To call, press the call button. " Thus, the recipient subscriber is notified of the failed call.

In accordance with the IN (Intelligent Network) paradigm, also known as CAMEL (Customized Applications for Mobile networks Enhanced Logic), the DVO logic is implemented on a separate control node (SCP, Service Control Point) interacting with the SSP (Service Switching Point) switching node via network alarm. The switching node is exclusively engaged in switching, and the conditions under which it is necessary to send a request to the SCP address are determined by triggers that are added to the SSP by O-CSI (Originating CAMEL Subscription Information), T-CSI (Terminating CAMEL Subscription Information) or at the network level - N-CSI (Network Service CAMEL Subscription Information).

A patent of the Russian Federation dated 05.26.2004 No. 2361369 is known, according to which the subscriber is provided with network access for all incoming calls, and for outgoing calls, when there is insufficient funds on the actual account, they can make an outgoing call, while forcibly disconnecting the connection after a specified number of CPV signals (sending code call, what is popularly called "long beeps"). As a result, the caller does not receive voice connectivity, and the caller is notified of the missed call.

A patent is known from September 20, 2012 No. WO 2012125012, according to which a voice call of subscriber A through his operator is sent to the server, disconnect subscriber A at the command of the server, a transit (information) call is formed on the server, a transit call is sent through the operator of subscriber A to the subscriber’s operator B and disconnect the information call after receiving it by subscriber B.

The development of these inventions and the closest technical solution adopted for the prototype is represented by the RF patent dated December 30, 2013 No. 2553452, according to which the billing of the operator redirects the call to the answering machine notifying the caller about insufficient funds and at the same time to the Universal System for the provision of Additional Operator Services ( USDS), which processes information and forms a transit connection which, through the operator of the calling subscriber, is sent to the operator of the called person to notify missed call or via SMS. And to notify the caller of insufficient funds use an answering machine.

The disadvantage of the prototype is:

- limiting the application of the method to the case of a call initiation i.e. before transmitting voice data, for example, via the RTP protocol.

- not disclosing the technical implementation of the method of redirecting a call to an answering machine.

The technical result of the proposed method is a reliable controlled rerouting of the established connection to additional types of services at the end of the maximum talk time without disconnecting the connection for the caller of the service using Intelligent Call Control (CAP / ISUP) and Session Establishment (SIP) punctures.

In the first embodiment of the method, the technical result is achieved by the method of the controlled establishment and disconnection of the call at the end of the maximum talk time to direct the caller to additional types of services for the puncture of intelligent call control (CAP / INAP), by which to switch the established connection to additional types of services services use an additional media platform use an additional media platform including an additional control unit additional services, and when establishing a subscriber’s connection, they form at least one additional signal interaction between the service switching node and the additional media services control node, form the maximum talk time of at least one signal interaction on the media platform services control node, and control the maximum talk time at least one formed signal interaction at the service switching node, and upon reaching the maximum time During the conversation, at least one additional channel of signal interaction is disconnected, and the established connection with the subscriber is routed to additional types of services.

In the second embodiment of the method, the technical result is achieved by the method of the controlled establishment and disconnection of the call at the end of the maximum talk time to direct the caller to additional types of services to puncture the session establishment (SIP / ISUP), by which to switch the established connection to additional types of services use an additional media platform including an additional services management node and an additional services implementation node and when establishing a subscriber’s connection, at least one signal interaction channel is formed between the service switching node and the additional services center of the media platform using the CAP or INAP protocol and at least one signal interaction channel between the services switching node and the additional services implementation node is based on SIP or ISUP protocol, control the maximum talk time of the established signal interaction via SIP protocol on the service control node, and when the maximum time is reached, a thief, a team of additional services control unit produce SIP or ISUP rerouting established connection to the service additional services on site implementation of additional services or media platforms on the switching node.

The technical result of the device of the proposed system is reliable controlled rerouting of the established connection to additional types of services at the end of the maximum talk time using the main communication signaling interaction protocols without breaking the connection for the calling subscriber.

The technical result is achieved for a controlled call disconnection system at the end of the maximum talk time for directing the caller to additional types of services containing interconnected switching nodes and a service management node, which additionally includes a media platform consisting of an additional services management node and an additional services implementation node made with the possibility of establishing at least one additional signal connection is established I’m calling the service switching node and the service control node using the CAP protocol and at least one signal connection of the service switching node and the additional services implementation node via the SIPt protocol, and also with the possibility of receiving the maximum duration of the conversation from the service management node, its modification and transmission to the node switching, and with the possibility of redirecting at least one signal connection to additional services

The method is illustrated by drawings:

In FIG. 1 shows a simplified scheme of ATP.

In FIG. Figure 2 shows the ATP scheme for call forwarding using the ATS protocol.

In FIG. Figure 3 shows the ATP scheme for SIP redirection

In FIG. Figure 4 shows the ATP scheme for SIP redirection without using an additional services implementation node.

In FIG. Figure 5 shows the signaling dialog for forwarding according to the ATS protocol.

In FIG. Figure 6 shows the SIP forwarding signaling dialog.

Moreover, in FIG. 1-4 ATS signaling is shown by dashed lines, the media session and SIP signaling are solid. In FIG. 5, 6 subscribers of Subscriber 1, Subscriber 2 for compact recording are designated as Subsc 1, Subsc 2, respectively.

The specified method is implemented in the ATP of FIGS. 1-3, including the interacting main nodes — mobile subscriber terminals (Subscriber 1, Subscriber 2) 100, 200; nodes switching services VMSS / VMSC (Visitor Mobile Switching Service / Center) 110, 210 performing in the general case the functions of SSP communication networks; SCP 301 Service Management Node; media platform, including SCP QNECT Plus 302 additional services management node and iMCF QNECT Plus 402 additional services implementation node; node DVO MRP (Media Resource Function) 401. SCP QNECT Plus implements the management of additional services in the ATP, iMCF QNECT Plus implements support for additional services in the ATP in accordance with the policy implemented by SCP QNECT Plus. MRF node is an additional platform providing DVO - IVR, auto redial, etc.

The operation of the system and the method are shown by the example of routing a subscriber to a service management service using the IVR voice menu when the maximum talk time occurs during a conversation. The system and method are not limited only to this example, and, as is obvious to a person skilled in the art, it is applicable to other TWOs known in the art, without going beyond the scope of the invention. This embodiment of the method is presented as illustrative and does not limit the scope of the invention defined by its claims.

In a variant of the CAP protocol (CAMEL Application Part) of FIG. 2, 5, the system operates as follows: A call from a Subscriber 1 100 Call1-1 100-1 subscriber (Fig. 2) arrives at the VMSS / VMSC 110. The call state IDP (Initial Detection Point) DP2 (collected info) 302-1 is generated (Fig. 2), 1 (Fig. 5), indicating the status of the call at the beginning of its processing to SCP QNECT Plus. SCP QNECT Plus forms a new dialogue in the direction of SCP 301-1 (Fig. 2), 2 (Fig. 5) and receives from the SCP a request for permission call RRB (Request report Basic Call State Model-BCSM) and ACH (Apply Charging) with the maximum allowable duration of 3 (Fig. 5) (not shown in Fig. 2). SCP QNECT Plus generates an RRB response to the original IDP based on the response from SCP, with the maximum connection duration increasing by the configured ACH (duration + delta). Instead of CONTINUE (or CONNECT with a normalized number), a CONNECT message is generated with the prefix and number В CONN (prefix1 + Subscriber 2 #), in the RRB message, the o-Disc event is set in Interrupted 302-1 mode (Fig. 2), 4 (Fig. 2). 5). Upon receipt of a CONNECT message to a number with the N-csi prefix, the VMSS / VMSC trigger software routes the call and generates an IDP to SCP QNECT Plus 302-1 (Fig. 2), 5 (Fig. 5). Upon receipt of the second IDP, SCP QNECT Plus uses the previously obtained maximum call duration time and modifies the number, removing the prefix 302-1 (FIG. 2), 6 (FIG. 5). A second signaling dialog is established between VMSS / VMSC 110 and SCP QNECT Plus 302-1 (Fig. 2). Further, the VMSS / VMSC software exchanges standard connection establishment messages with the VMSS / VMSC 210 100-2 (FIG. 2) 7.8 (FIG. 5). A Call 1-3 call is established on a 200 Subscriber 2 subscriber via VMSS / VMSC 210 Ca112-1 200-1 (Fig. 2) and signal monitoring of the duration of the media session begins, and the maximum time of the media session for the first signaling dialogue is increased by the set delta. The event of establishing a conversation and the beginning of charging is sent in the message ERB (Event Report BCSM (O_Answer)) to the address of SCP QNECT Plus for the first dialogue 302-1 (Fig. 2), 9 (Fig. 5). Upon reaching the maximum allotted time ACR (duration) for the second dialogue, an ACR message (Apply Charging Report) 302-1 (Fig. 2), 10 (Fig. 5) is formed, the process of disconnecting the subscriber 200 Subscriber 2 11 (Fig. 5) is initiated and formed the disconnection signal towards the subscriber 100 Subscriber 1. The second signal dialog 302-1 (Fig. 2) 5.6 (Fig. 5) is broken. Disconnect event for the first dialogue 302-1 (Fig. 2) 1.4 (Fig. 5) is detected as disconnection from the subscriber 200 side of Subscriber 2, a message is sent to SCP QNECT Plus about the duration of the connection and an indication of the end of the call 302- 1 (FIG. 2) 12 (FIG. 5). SCP QNECT Plus informs SCP of the end of call 13 (FIG. 5) (not shown in FIG. 2) and instructs the VMSS / VMSC 110 to route the connection to the IVR number of the MRF service of node 401 (not shown in FIG. 5) 14 (FIG. . 5). A call is established on the IVR service 401-1 (Fig. 2), 15 (Fig. 5).

In another embodiment of the Session Initiation Protocol method of FIG. 3.6, the system operates as follows: The connection establishment signaling dialog is identical to the first embodiment 302-1, 301-1 (FIG. 3) 1-4 (FIG. 6). After receiving a message to establish a connection to a number with a prefix, the call is routed to the SIP node iMCF QNECT Plus 402-1 (Fig. 3) 5 (Fig. 6). The SIP node modifies the Invite message and sends the request to establish a connection between Subscriber 1 and Subscriber 2 402-1 (Fig. 3) 6 (Fig. 6) via the SDP of the incoming message 402-1 (Fig. 3). VMSS / VMSC software sends a standard call setup message with Subscriber 2 100-2 (FIG. 3) 7 (FIG. 6) and receives a “response” response from Subscriber 1 100-2 (FIG. 3) 8 (FIG. 6). VMSS / VMSC software generates a 200 Ok message to the SIP node address, the message indicates the SDP for the SDP-Subscriber 2 402-1 connection coming from the SIP node (Fig. 3) 9 (Fig. 6 is indicated schematically). The SIP node uses the same SDP-Subscriber 2 and generates 200 Ok for incoming connection 10 (Fig. 6). The VMSS / VMSC software informs the SIP node of the call setup event in the ERB message (o-Answer) 11 (FIG. 6). The SIP node notifies SCP 12 (Fig. 6). A media session is established between VMSS / VMSC 110 and VMSS / VMSC 210 (Subscriber 1 and Subscriber 2) without passing through the SIP node 100-2, 200-1 (Fig. 3). Upon reaching the maximum connection time, the SCP sends the FCI (Forward Call Indicators) indicator of forced disconnection of the RC (Release Call) connection to the SCP QNECT Plus 302 13 (Fig. 6). SCP QNECT Plus 302 directs the FCI indicator to the VMSS / VMSC software for disconnecting the media session 14 from the CAP (Fig. 6) and the disconnect command to the SIP node 15 (Fig. 6). The SIP node sends a BYE request to disconnect Subscriber 2 16 to the VMSS / VMSC software (Fig. 6).

In the first version of routing Subscriber 2 to the IVR service of the MRF node of the SIP method, the SIP node initiates an invite 17 request (Fig. 6) to the IVR service address for Subscriber 1 and uses the SDP received during SIP signaling 5 (Fig. 6). VMSS / VMSC software establishes a connection with the MRF node and routes the call to IVR 401-1 18 (Fig. 6), after the IVR answers the incoming connection 19 and sends a confirmation to the SIP node with the SDP description for the IVR service 20 (Fig. 6). The SIP node forms the forwarding of the installed media session to the IVR service 21 (Fig. 6) after confirmation of the forwarding 22 (Fig. 6), a media session 401-1 with the IVR service of the MRF 401 node is established.

In the second embodiment of the SIP routing, the SIP node initiates disconnection in the Bye message in the direction of Subscriber 1 23 (Fig. 6). After the trigger is triggered on the VMSS / VMSC 110, it informs SCP QNECT Plus 302 that they are triggered when the set connection time for the ATS dialogue 24 is exceeded (Fig. 6). In response, SCP QNECT Plus 302 contains call setup parameters for IVR 25 (FIG. 6), the call is routed to the IVR MRF service of node 401, and a call is established between Subscriber 1 and IVR service 401-1 (FIG. 3), 26 (FIG. 26).

The method can be implemented by generating a signal interaction between the services switching node and the additional services center for managing the media platform using the INAP protocol and signaling interaction between the services switching nodes and the additional services implementation node using the ISUP protocol. In this case, upon reaching the maximum talk time, ISUP redirects the established connection to the additional services service at the additional services platform of the media platform. In this embodiment of the method, the signaling interaction logic is similar to the SIP method embodiment.

In another embodiment of the SIP or ISUP method, Subscriber 1 is forwarded to the network switching node - VMSS / VMSC 110, without the participation of the media platform nodes, in this case the establishment and disconnection logic is similar to the second embodiment of the method using the SIP protocol, but the forwarding occurs to VMSS / VMSC without signaling interaction with iMCF QNECT Plus.

In order to route subscriber 1 to other VMSCa additional services, SCPqnect can set up more than one additional signaling channel, while the routing algorithm of the connection with disconnecting Subscriber 2 and forwarding Subscriber 1 does not change.

The program logic for controlling the establishment and separation of signaling channels is implemented by SCP QNECT Plus using the open call control APIs (Parlay and others). The interaction of SCP QNECT Plus and iMCF QNECT Plus 302-1 (Fig. 3) for the second SIP embodiment of the method is implemented by the API QNECT Plus software package, which is the know-how of the applicant.

After routing Subscriber 1 to an IVR service, the standard logic of the voice messaging and routing system is implemented, for example, if Subscriber 1 is suitable for scoring a trust payment, the available amount is automatically calculated and the amount and the offer to enable the service are calculated, otherwise standard auto-notification is played about the need to replenish the balance. If necessary, Subscriber 2 - an SMS notification is sent about the possibility to call back Subscriber 1.

The technical effect of the presented method consists in implementing a simple reliable method for routing an established prepaid subscriber connection without breaking the established connection to additional network services.

Claims (6)

1. A method for the controlled establishment and disconnection of a call at the end of the maximum talk time to direct the caller to additional types of services using the Intelligent Call Control Protocol (CAP / INAP), which uses an additional media platform including an additional control unit to switch the established connection to additional types of services services, characterized in that when establishing a connection of subscribers form at least one supplement the signal interaction between the services switching node and the control center for additional services of the media platform, form the maximum talk time of at least one signal interaction on the services platform of the media platform, control the maximum talk time of at least one generated signal interaction on the services switching node, and when reaching the maximum talk time disconnect at least one additional signal interaction I, and the established connection with the subscriber is routed to additional types of services. 2. A method for the controlled establishment and disconnection of a call at the end of the maximum talk time to direct the caller to additional types of services using the Session Establishment Protocol (SIP / ISUP), which uses an additional media platform including an additional management node to switch the established connection to additional types of services services and a node for the implementation of additional services, characterized in that when establishing a connection, subscribers are formed at at least one channel of signal interaction between the node of switching services and the node for managing additional services of the media platform using the CAP / INAP protocol and at least one channel of signal interaction between the node of switching services and the node for implementing additional services in the SIP protocol, control the maximum talk time of the established signal interaction using SIP protocol on the service control node, and upon reaching the maximum talk time at the command of the additional services control node, produce SI P rerouting the established connection to the additional services service at the node for the implementation of additional services of the media platform. 3. The method according to p. 2, characterized in that when the maximum talk time is reached, the ISUP is re-routed for the established connection to the additional services service at the node for the implementation of additional media platform services. 4. The method according to p. 2, characterized in that when reaching the maximum talk time, SIP redirects the established connection to the additional services service on the switching node. 5. The method according to p. 2, characterized in that upon reaching the maximum talk time, ISUP redirects the established connection to the additional services service on the switching node. 6. A system for the controlled establishment and disconnection of a call at the end of the maximum talk time to direct the caller to additional services, comprising interconnected switching nodes and a service management node, which additionally includes a media platform including an additional services management node and an additional services implementation node, characterized in that the media platform is configured to establish at least one additional signal connected establishing a call to the service switching node and the service control node via CAP / INAP protocol and at least one signal connection of the service switching node and the additional services implementation node via the SIP protocol, by the possibility of obtaining the maximum duration of the conversation from the service control node, its modification and transmission to the node switching and the ability to redirect at least one signal connection to additional services.

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