KR100897081B1 - System and method for monitoring the voice call of mobile terminal - Google Patents

Abstract

Disclosed are a mobile terminal interception system and an interception method through a mobile switch in a mobile communication network. According to an embodiment of the present invention, when a call channel between another mobile terminal to be monitored is connected to the mobile terminal, the mobile terminal automatically detects the call channel and performs a call forwarding to the mobile terminal. The call channel connected between the mobile terminal and the other terminal is connected to the call channel of the eavesdropping terminal, thereby intercepting the call voice between the eavesdropping target terminal and the other terminal through the intercepting called mobile terminal. The call channel connection between the eavesdropping target terminal and the incoming call receiving terminal may use Global Service Control (GSC) and Call Mixer (CMX) that support a three-party / conference call function. Accordingly, the mobile terminal can be intercepted without setting a separate protocol / voice data processing and an additional voice data transmission channel for interworking with the main monitoring device.

Mobile terminal, switchboard, interception

Description

Mobile terminal interception system and interception method {SYSTEM AND METHOD FOR MONITORING THE VOICE CALL OF MOBILE TERMINAL}

1 is a block diagram of a mobile communication system for a conventional mobile terminal interception;

2 is a block diagram of a mobile communication system for interception of a mobile terminal according to one embodiment;

3 is an internal block diagram of the mobile exchange of FIG. 2;

4 is a detailed block diagram of the interception function processor of FIG. 3;

5 is a flowchart of a method of intercepting a mobile terminal according to an embodiment;

* Explanation of symbols for the main parts of the drawings

1, 3, 5: mobile terminal 10: base station

20: base station controller 30: mobile switching center

40: home location register 70: MMI

310: CCS 320: ASS-T

330, 350: ASS-M 340: ASS-S

341: interception function processing unit 342: interception command receiver

343: interception command processing unit 344: interception command execution unit

345: interception DB 347: GSC

349: CMX 360: INS

361: switching network control unit 363: space switch

The present invention relates to a mobile terminal interception system, and more particularly, to a mobile terminal interception system and an interception method through a mobile switch of a mobile communication system.

As shown in FIG. 1, the conventional mobile communication system includes a mobile station (MS) 100, a base station system (BTS) 110, and a base station controller (BSC) 120. ), A Mobile Switching Center (MSC) 130, and a Home Location Register (HLR) 140. The mobile switch 130 includes a visitor location register (VLR) therein, and is connected to a public switched telephone network (PSTN) as well as to another public land mobile network (PLMN). do.

The BTS 110 forms a wireless communication path together with the mobile terminal 100 and manages radio resources. The BSC 110 performs radio link and wired link control, hand-off functions. The HLR 140 stores subscriber information and performs terminal location registration. The VLR performs location registration of the mobile terminal outside the home mobile switch.

When the mobile terminal sends an outgoing call and looks at the processing in the MSC 130 when another mobile terminal of its own country receives the call, it is as follows.

First, when a mobile subscriber attempts to make a call, the call request is made through the MS 100, the BTS 110, and the BSC 120 through an outgoing mobile call control unit in an access switching subsystem (ASS) of the MSC 130. ASS-M) the caller's incoming request signal is received. The calling mobile call controller ASS-M requests the calling terminal information from the VLR to obtain the calling terminal information. The originating mobile call controller checks whether the call request of the calling terminal can be accepted, and if the call request is acceptable, notifies the BSC 120 that the call request can be accepted. The BSC 120 transmits the called number to the calling mobile call controller. The outgoing call control unit receiving the called number forwards the called number to the number translation unit and requests translation of the number. If the called subscriber is the mobile terminal, the number translation unit transmits the mobile call notification to the calling mobile call controller. The calling mobile call controller requests the location information of the called terminal from the HLR 140. When the originating mobile call controller receives the called location information from the HLR 140, it transmits a mobile call request to the VLR. The VLR forwards the paging request to the terminating mobile call control unit in an access exchange subsystem (ASS) with the terminating terminal. The incoming mobile call controller delivers a paging request to the BSC 120.

When paging is transmitted to the BSC 120, the BTS 110, and the called terminal 160, the called terminal 160 transmits a paging response to the BTS 110, the BSC 120, and the called mobile call controller. The called mobile call controller sends a notification of the incoming mobile terminal occupation to the calling mobile call controller.

 The originating mobile call control unit sends a switch connection notification to the incoming mobile call control unit after the switch connection. The incoming mobile call control unit starts setting up the incoming call. Thereafter, after the called party location is determined and the call setting is completed, if the called terminal 160 is in a call, the called party BSC sends an incoming signal to the MSC 130. The incoming mobile call control unit of the MSC 130 which has received this transmits a ring back tone from the called party mobile call control unit to the calling party through internal switching of the MSC 130 that has already been set. Then, when the called terminal responds, the called mobile call controller stops the incoming call and connects the call path to make a call between the two terminals.

In the conventional mobile communication system, as shown in FIG. 1, the main monitoring device 150 is connected to the MSC 130 to monitor and listen to a call of a specific mobile terminal making a call in the above-described process.

The main monitoring unit 150 receives a monitoring and interception command for a specific mobile terminal from the user and requests the MSC 130 from the user. Upon receiving it, the MSC 130 transmits a response to the monitoring and listening command, intercepts the voice data transmitted through the call channel connected between the mobile terminal and the other terminal, and transmits it to the main monitoring apparatus 150. The voice data intercepted by the MSC 130 is transmitted to the primary monitoring apparatus 150 through the voice channel generated by the fixed subscriber call controller (ASS-S) to which the public network is connected, and the MSC 130. And the data between the primary monitoring device 150 and the primary monitoring device 150 are transmitted to the primary monitoring device 150 through a PCM link by a digital service unit or a data channel through a dedicated network implemented by a modem link.

As such, in the related art, in monitoring and intercepting a specific mobile terminal, a main monitoring device connected to a separate voice / data channel must be provided. In addition, a separate protocol (e.g., X2.5 protocol) / voice data processing is necessary in the mobile exchange to interwork with the main monitoring device, and the mobile exchange is transmitted through a communication channel connected between the mobile terminal and another terminal. Since the voice data to be delivered to the main monitoring device, an additional voice data transmission channel to the main monitoring device is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a system and an interception method for performing interception of a mobile terminal without setting a separate protocol / voice data processing and an additional voice data transmission channel for interworking with a main monitoring device.

According to one embodiment, a mobile terminal interception system and a method of interception are provided through a mobile switch in a mobile communication network. In this embodiment, when the call channel of the mobile terminal to which the interception target mobile terminal is connected is detected, the mobile terminal automatically detects the call and performs a call forwarding to the preset intercepting mobile terminal. The call channel connected between the terminal and the other terminal is connected to the call channel of the intercepting called mobile terminal to intercept the call voice between the intercepting target mobile terminal and the other terminal through the intercepting called mobile terminal. The call channel connection between the eavesdropping target terminal and the incoming call receiving terminal may use Global Service Control (GSC) and Call Mixer (CMX) that support a three-party / conference call function.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description, when there is a risk of unnecessarily obscuring the gist of the present invention, a detailed description of well-known functions and configurations will be omitted.

The present invention relates to a method for monitoring and intercepting a call of a specific mobile terminal in a mobile switching system of a mobile communication system without a separate interception equipment or interception system. In one embodiment, the interception function of the mobile terminal is implemented in a mobile exchange in an existing mobile communication system.

2 is a block diagram of a mobile communication system for interception of a mobile terminal according to one embodiment, FIG. 3 is an internal block diagram of the mobile switch of FIG. 2, and FIG. 4 is a detailed block diagram of the interception function processing unit of FIG. 3. As shown in FIG. 2, the mobile communication system 200 includes a BTS 10, a BSC 20, an MSC 30, and an HLR 40. The BTS 10 is matched with the MSC 30 through the BSC 20 and performs functions such as wireless connection, synchronization maintenance, call channel allocation and release, etc. of the mobile terminal 1. The BSC 20 exists between the BTS 10 and the MSC 30 and performs control of a base station, radio resource management, a handover function, and the like.

On the other hand, the HLR 40 is a large capacity real-time database system that manages the information of the subscriber mobile terminal in the mobile communication, this system interacts with other equipment to perform various functions. The MSC 30 is located in the middle of the mobile communication system and performs a function of forming a voice and non-voice communication path by matching with the BSC 20, the HLR 40, and other additional service centers. In addition, the MSC 30 provides an interception function processing unit that functions as a mobile terminal interception system to perform the interception function of the calling terminal.

As shown in FIG. 3, the MSC 30 establishes a switching connection to form a call path between the calling terminal and the called terminal, and the connection switching subsystem performs the overall function of localized call processing. Access Switching Subsystem (ASS), Interconnection Network Subsystem (INS) 360 to realize the overall functionality of centralized call processing, and Central Control Subsystem (CCS) responsible for centralized operation and maintenance functions. Central Control Subsystem (310).

Here, the CCS 310 provides a communication window and means between the MSC 30 and the operator, and the interaction between the mobile switch and the operator to provide functions such as operator matching, billing, traffic measurement, network management data management, and the like. To regulate. The CCS 310 is provided with an Operation Maintenance Processor (OMP) 311 for operation and maintenance. The OMP 311 is a processor that controls input / output matching for an operator, and may include a communication port such as RS-232 for matching with a peripheral device. According to an embodiment, the OMP 311 is implemented with a function of receiving an eavesdropping command from the operator / user and processing the eavesdropping command. The OMP 311 is connected to a man machine interface (MMI) 70, so that an operator may input an interception command through the MMI 70.

The ASS is a relay line call control unit (ASS-T) 320, a mobile subscriber call control unit (ASS-M) 330 and 350, and a fixed subscriber call control unit (ASS-S) 340 according to the information attribute of the terminal accommodated. Each call control unit (320, 330, 340, 350) is provided with a time switch (T-switch).

The INS 360 connects the CCS 310 and the plurality of call controllers (ASS-S, ASS-T, and ASS-M) to each other, performs number translation, route control, and centralized call processing. Perform the function. The INS 360 is a Number Translation (not shown), a total switch of the MSC 30, which notifies and executes a translation for the requested number in response to the number translation request from the ASS-M 330 (not shown). Time of each ASS according to the control of the Switching Network Control (SNC) 361 and the Switching Network Control 361, which performs the functions of allocating and releasing a call for connection / release of a call to a channel of a TST switch network). Space-switch (SSW) 363, which is connected to a location and performs a function of connecting and releasing a call path for a call processing service, is included.

According to an embodiment, the ASS-S 340 is provided with an interception function processor 341. In order to perform the interception function, the Global Service Control (GSC) 347 and the Call Mixer (CMX) 349 provided in the ASS-S 340 are used to control a multi-call service such as a 3 party / conference call service. Can be. In the present embodiment, the interception function processing unit 341 is described as provided in the ASS-S, but may be configured in the CCS 310 or the INS 360 or may be implemented as a separate module in the MSC 30.

The GSC 347 retrieves and manages output information of the recording guide device for a call using a one-way voice path such as a recording guide, and manages assignment and release of the CMX 349 used for a three-way or conference call.

In one embodiment, the interception function processing unit 341 is a subscriber monitoring, and detects the connection of the call channel of the eavesdropping target mobile terminal and the incoming call to any pre-determined incoming mobile terminal to perform the interception. In addition, the interception function processing unit 341 is a subprogram block for performing the interception function, as illustrated in FIG. 4, and includes an interception command reception unit 342, an interception command processing unit 343, and an interception command execution unit 344. It may include an interception DB 345.

When the operator / user inputs an eavesdropping command in the MMI 70 connected to the mobile switching center 30, the interception command receiving unit 342 issues an interception command through an operator command processing unit implemented in the OMP 311 of the CCS 310. Receive. In addition, the intercepting command processor 343 receives the intercepting command from the intercepting command receiving unit 342, analyzes the corresponding command, and stores information such as the number of the intercepting target mobile terminal and the intercepting incoming mobile terminal in the interrogation DB 345.

On the other hand, the interception command execution unit 344 monitors the mobile subscriber call control unit (ASS-M) (330, 350), detects whether or not the mobile terminal of the target of the eavesdropping call, and the interception of the eavesdropping stored in the interception DB (345) The translation of the terminal number is requested by the INS 360 to be performed. Here, the call connection of the eavesdropping target terminal may be performed at the time of call establishment. Then, the interception command execution unit 344 requests the call reception to the call control unit (ASS-M (330, 350) or ASS-T 320) corresponding to the number of the eavesdropping terminal according to the number translation result. Subsequently, upon detecting a response from the intercepting incoming mobile terminal 5, the call of the interrogation target mobile terminal is transmitted to the interrogation DB 345 through the GSC 347 and the CMX 349 performing the three-party / conference call function. It connects to the preset intercepting incoming mobile terminal, and outputs the details to the operator / user through the MMI 70.

The interrogation DB 345 may store information on the eavesdropping target mobile terminal and information on the eavesdropping mobile terminal to receive the eavesdropping voice of the eavesdropping target mobile terminal. For example, the information of the mobile terminal to be intercepted and the mobile terminal to which the interception is to be received may be input by an operator through the MMI 70 and stored in the interception DB 345 in advance.

In one embodiment, the GSC 347 controls the CMX 349 when the call channel of the eavesdropping target terminal is connected at the request of the eavesdropping function processor, so that the third party / conference call function is performed, and the eavesdropping target movement is performed. The call channel of the terminal is connected to the call channel of the eavesdropping mobile terminal previously stored in the interception DB 345.

For example, to intercept the intercepted mobile terminal 5, the GSC 347 controls the CMX 349 to transfer the call channel of the intercepted mobile terminal 1 to the call channel of the intercepted mobile terminal 5. The connection method may be performed as follows.

When the interception command execution unit 344 requests the connection of the third party terminal to the GSC 347 supporting the 3rd party / conference call function, the GSC 347 controls the CMX 349 to establish a channel for the interception terminating terminal. The SNC 361 provided in the INS 360 requests the connection of the allocated channel. The SNC 361 of the INS 360 controls the SSW 363 to connect the time switch of the ASS on the eavesdropping mobile terminal 5 to the assigned Eavesdropping channel. The GSC 347 controls the call mixer 349 to further allocate a channel for the eavesdropping target terminal. The GSC 347 requests the SNC 361 of the INS 360 to connect the allocated channel. The SNC 361 of the INS 360 controls the SSW 363 to connect the interception target mobile terminal side time switch to the assigned interception channel. When the interception command execution unit 344 receives a report from the GSC 347 that a call channel between the interception originating mobile terminal 1 and the interception terminating mobile terminal 5 is connected, the interrogation command execution unit 344 requests the GSC 347 for the CMX 349. By controlling the control, the transmission channel of the eavesdropping incoming mobile terminal 5 is blocked.

Hereinafter, a mobile terminal interception method according to an embodiment will be described in detail with reference to FIG. 5.

As shown in FIG. 5, an operator / user makes a call to an arbitrary intercepting mobile terminal when a call is connected to the interrogation target mobile terminal through a user interface of the interception system, and intercepts a specific interception target mobile terminal. When inputting the interception command requesting, the interception function processing unit of the interception system receives the corresponding commands (S1). For example, as shown in FIGS. 3 and 4, when an operator / user inputs interception commands through the MMI 70, the operator command processing unit implemented in the OMP 311 in the mobile exchange 30 receives the interception command. It is transmitted to the interception function processing unit 341 provided in the ASS-S 340, and the interception command receiver 342 of the interception function processing unit 341 receives the interception command.

The interception command processor 343 analyzes the interception command received by the interception command receiver 342 and stores the information of the interception target mobile terminal and the interception receiver terminal in the interception DB 345 (S3). The interception command execution unit 344 detects whether the interrogation target terminal is connected to a call (S5). When the interception command execution unit 344 detects a call connection of the eavesdropping target terminal, it performs translation of the eavesdropping called terminal number stored in the interception DB 345 (S9) and requests a call termination from the corresponding called terminal. For example, the eavesdropping command performing unit 344 receives the number information of the eavesdropping target terminal translated by the number translation unit of the INS 310 and translates the number into the INS 360 of the MSC 30. By requesting the call request may be requested to the call control unit (ASS-M 350 or ASS-T 320) corresponding to the interception of the terminal number.

Then, when detecting a response from the interception terminating terminal 5 (S13), the interception command execution unit 344 requests the connection of the CMX 349 to perform the three-way call function (S15). The CMX 349 is controlled to allocate a channel (S17), and the call of the eavesdropping terminal is connected to the allocated channel of the CMX 349 (S19). For example, the interception command execution unit 344 requests the GSC 347 to connect the CMX 349 to allocate the channel to the CMX 349, and the SNC of the INS 310 through the GSC 347. By requesting 361 to control the SSW 363, the time switch (not shown) of the interception terminating terminal side call control unit (ASS-M 350 or ASS-T 320) is assigned to the CMX 349. You can connect to the channel.

Next, the interception command execution unit 344 controls the CMX 349 to further allocate a channel (S21), and connects the call of the interception target terminal to the allocated channel of the CMX 349 (S23). For example, the interception command execution unit 344 requests the SNC 361 of the INS 310 to control the SSW 363 through the GSC 347 to control the interception target terminal side call control unit ASS-M 350. ) Can be connected to an assigned channel of the CMX 349.

Thereafter, the interception command execution unit 344 blocks the transmission channel of the interception terminating terminal 5 (S25). For example, when the interception command execution unit 344 receives a report from the GSC 347 that a call channel between the interception call originating terminal 1 and the interception terminating call receiving terminal 5 is connected, the GSC 347 transmits a CMX 349 through the CSC 349. By controlling the, it is possible to block the transmission channel of the intercepting destination terminal (5).

As such, when a call channel of another mobile terminal to be intercepted is connected, an eavesdropping command unit detects this and automatically receives a preset eavesdropping mobile terminal, and performs an eavesdropping command when the preset eavesdropping mobile terminal answers. The voice connection between the wired target mobile terminal and the other terminal is intercepted by connecting a call channel connected between the additional wired target mobile terminal and the other terminal to the call channel of the wired reception target terminal.

Accordingly, the above embodiments add the interception function to the inside of the mobile exchange without additional interception equipment or the interception system, thereby connecting the call channel of a specific mobile terminal with any preset mobile terminal and intercepting the desired mobile subscriber through any subscriber. Operator's / user's voice data can be intercepted.

While the invention and its various functional components have been described in particular embodiments, the invention may be implemented in hardware, software, firmware, middleware, or a combination thereof, and the system, subsystem, components or sub-configurations thereof. It should be understood that they can be used as elements. If implemented in software, the elements of the invention are instructions / code segments for performing the necessary tasks. The program or code segments may be stored in a machine readable medium, such as a processor readable medium, a computer program product, or via a transmission medium or communication link by a computer data signal embodied in a carrier wave or a signal modulated by a carrier. Can be sent. Machine readable media or processor readable media may include any medium that can store or transmit information in a form readable and executable by a machine (eg, processor, computer, etc.).

In addition, while the present invention has been described in connection with some embodiments, it is to be understood that various modifications and changes can be made without departing from the spirit and scope of the invention as will be understood by those skilled in the art. You will need to know Also, such modifications and variations are intended to fall within the scope of the claims appended hereto.

As described above, according to embodiments of the present invention, a mobile terminal capable of performing a mobile terminal interception without setting a separate protocol / voice data processing and an additional voice data transmission channel for interworking with a main monitoring apparatus. An interception system and a mobile terminal interception method are provided.

Claims (13)

A mobile terminal interception system, An eavesdropping command receiving unit for receiving an eavesdropping command including a number of the eavesdropping target mobile terminal and an eavesdropping incoming mobile terminal; An eavesdropping command processor for extracting information on the number of the eavesdropping target mobile terminal and the eavesdropping incoming mobile terminal from the eavesdropping command; Receiving the extracted number of the eavesdropping target mobile terminal and the eavesdropping mobile terminal, detecting whether the eavesdropping target mobile terminal is connected to a call, and if the call connection is detected, performs a call to the eavesdropping mobile terminal, A mobile terminal including an interception command execution unit for connecting a call channel of the eavesdropping target mobile terminal to a call channel of the eavesdropping mobile terminal when the response is received from the eavesdropping mobile terminal; Interception system. The method of claim 1, Interworking with a mobile switch having a relay line call control unit, a mobile subscriber call control unit, a fixed subscriber call control unit, an interconnection control unit which interconnects each call control unit and performs a number translation function, and a call mixer supporting a three-way call function So, In order to connect the call channel of the eavesdropping target mobile terminal to the call channel of the eavesdropping mobile terminal, the call mixer is controlled to allocate a channel for the eavesdropping terminal, and the eavesdropping mobile terminal is called through the interconnection control unit. Connect the transmission / reception path of the control unit to the assigned channel for the intercepting called terminal, control the call mixer to allocate a channel for the intercepting target terminal, and transmit the interception control unit of the call controlling unit through the interconnect control unit A mobile terminal interception system, which connects a reception / reception path to the assigned channel for the intercepting destination terminal. The method of claim 2, The detecting of the call connection of the eavesdropping target mobile terminal is performed by the eavesdropping command execution unit detecting a call setup state by the mobile subscriber call control unit on the eavesdropping target mobile terminal side. delete The method of claim 2, The interception command execution unit, when performing the incoming call to the interception of the incoming mobile terminal number, Perform a number translation on the intercepting called mobile terminal number through the interconnection control unit, and check whether the number of the intercepting called mobile terminal is a number of a terminal in a domestic station or a number of a terminal of another network; And if the number of the terminal is a domestic terminal, request a call reception to the mobile subscriber call control unit, and if the number of the intercepting incoming mobile terminal is a terminal of another destination, request a call reception to the relay line call controller. The method of claim 1, The interception command receiver receives the interception command through a MMI (Man Machine Interface) provided in the mobile switch, the mobile terminal interception system. A mobile terminal interception method through a mobile switch in a mobile communication network, A first step of receiving an eavesdropping command including a number of the eavesdropping target terminal and the incoming and outgoing mobile terminal; A second step of extracting information on the number of the eavesdropping target mobile terminal and the eavesdropping called mobile terminal from the eavesdropping command; Detecting whether the interrogation target mobile terminal is connected to a call; A fourth step of performing a call forwarding on the intercepting mobile terminal number when the call of the interrogation target mobile terminal is connected as a result of the detection; And a fifth step of connecting a call channel of the eavesdropping target mobile terminal to a call channel of the intercepting called mobile terminal when receiving a response from the intercepting called mobile terminal. The method of claim 7, wherein In the fifth step, the call channel of the eavesdropping target mobile terminal is connected to the call channel of the eavesdropping mobile terminal. Allocating a channel for the eavesdropping terminal by controlling a call mixer provided in the mobile exchange; Connecting the allocated interception channel for the called terminal to the transmit / receive path of the intercepted mobile terminal through an interconnection control unit provided at the mobile exchange; Allocating a channel for an eavesdropping target terminal by controlling the call mixer; Connecting a channel for the supervised target terminal to a transmit / receive path of the supervised target mobile terminal through a switching network controller; And controlling the call mixer to block a transmission path of the intercepting incoming mobile terminal. The method of claim 7, wherein The third step is And detecting a call setup state of the eavesdropping target mobile terminal. delete The method of claim 7, wherein The fourth step, Performing number translation on the number of the intercepting incoming mobile terminal; Checking whether the number of the intercepting mobile terminal is a number of a terminal in a home country or a terminal of another network; If the number of the interception terminating mobile terminal is a domestic terminal, a call request is made to a subscriber call control unit provided to the mobile exchange. If the number of the interception terminating mobile terminal is a terminal of another network, the relay line call control unit provided to the mobile exchange. Requesting an incoming call to the mobile terminal. The method of claim 8, The interception command is received through the MMI (Man Machine Interface) provided to the mobile switching, mobile terminal interception method. A computer readable storage medium storing computer executable instructions for performing the method of any one of claims 7 to 9, 11 or 12.

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