KR100428862B1 - Method for Tracing Call Between Source MSC and Destination MSC Using Integrated Services Digital Network User Part Message - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

A method for performing call tracking of an originating exchange and an incoming exchange period in an exchange system using the ISUP protocol, and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. Technical problem to be solved by the invention

Provided are a computer-readable recording medium having a method for tracking a call even during an incoming exchange and an incoming exchange period through several exchanges and a program for realizing the method.

3. Summary of the Solution of the Invention

A first step of receiving a calling / called number transmitted by a calling mobile station and performing a routing process to a called exchange to which a called mobile station belongs, and determining whether the received calling / called number is a call tracking target and not a call tracking target. A second step of performing a normal outgoing call processing, and if the call / call number received in the first step is a call tracking target, the received call / call number is included in the call exchange; Transmitting a first common address message (IAM) to the destination exchange until the message of the termination type is received according to the initial address message (IAM). The originating / called number of the called exchange and the called exchange based on the exchange unique ID received from the called exchange in the fourth step of exchanging and performing the fourth step; And a fifth step of transmitting data including the unique ID to the exchange operator system.

4. Important uses of the invention

Used to track calls at exchanges.

Description

Method for Tracing Call Between Source MSC and Destination MSC Using Integrated Services Digital Network User Part Message}

The present invention relates to a switching system of a mobile communication network, and more particularly, an outgoing exchange (Mobile) in a switching system using a common line signaling type Integrated Information Digital Network User Part (ISP) protocol. And a computer readable recording medium having recorded thereon a program for realizing the method.

ITU-T No.7 signaling is a general purpose common signaling scheme standardized by ITU-T in 1980. Designed to be suitable for digital communication network, it can transmit not only for telephone exchange but also various signals for circuit switched data communication service or network operation management. In order to increase the versatility, the scheme has a hierarchical structure, and is divided into a signal transmission unit and a user unit. The signal transmitter is responsible for controlling the transmission of signals, correcting errors, and security measures for the signal network, and the user unit is individually designed according to application areas such as telephone exchange and data exchange. ISUP signal processing must be done for ISUP, and ISUP recommends ITU-T. Q.763-Signaling system No. 7-Defined in ISDN user part formats and codes.

However, exchange call tracking by conventional R2 signaling is performed by route, access switching processor (ASP), trunk, or prefix, and such a gateway-type call tracking is only specific. Since it is possible only for an arbitrary originating / incoming call occurring at two exchanges, there is a problem that call tracking between a specific call passing through multiple exchanges or an originating exchange and receiving exchange passing through multiple exchanges is impossible.

The present invention has been made to solve the above problems, and by using the origin / call number included in the ISUP message in the exchange period for exchanging ISUP messages, call tracking in the outgoing exchange and the incoming exchange period passing through several exchanges It is an object of the present invention to provide a computer-readable recording medium having recorded thereon a method capable of doing this and a program for realizing the method.

Those skilled in the art to which the present invention pertains can easily recognize other objects and advantages of the present invention from the drawings, the detailed description of the invention, and the claims.

1 is a configuration diagram of an exchange system using an ISUP signal;

2 is a block diagram of an exchange performing a call tracking method according to the present invention;

3 is a flowchart showing a call tracking method at an originating exchange;

4 is a flowchart illustrating a call tracking method in a destination exchange.

<Explanation of symbols for the main parts of the drawings>

117: calling terminal 127: called terminal

110, 120: mobile communication network 130: gateway switching center

111 to 115 and 121 to 125

201 trunk line exchange subsystem

203: common line signaling subsystem

205: MCT 207: TC7

209: TI7

In order to achieve the above object, the present invention provides a call tracking method using a common line signaling method integrated information network user unit (ISUP) message, which is applied to a switching system of a mobile communication network, and a calling / called number transmitted by an originating mobile station. First step of performing a routing process to the destination exchange to which the called mobile station belongs, and determining whether the received call / calling number is a call tracking target and performing normal outgoing call processing if it is not a call tracking target. In the second step, if the caller / called number received in the first step is a call tracking target, the initial address message (IAM) including the received caller / called number is transmitted to the destination exchange. In a third step, a common line signaling method integrated information network user unit (ISUP) message is received until an end type message is received according to the initial address message (IAM). Exchange operator system with data including the origin / call number and the unique ID of the destination exchange based on the exchange unique ID received from the destination exchange during the fourth step and the fourth step of exchanging the message with the destination exchange. The present invention provides a call tracking method in an outgoing exchange including a fifth step of transmitting the same. In order to achieve the above object, the present invention provides a common line signaling method integrated information network user unit applied to a switching system of a mobile communication network. (1SUP) A first function for receiving a call / call number sent by an originating mobile station and performing a routing process to the destination exchange to which the called mobile station belongs, to an exchange equipped with a processor, for call tracking at an originating exchange using an ISUP message. Determining whether or not the received call / call number is a call tracking target and not a call tracking target. A second function for performing normal outgoing call processing, and if the call / call number received in the first function is a call tracking target, the received call / call number is included in the call exchange; A third function of transmitting an initial address message (IAM), and a common line signaling method integrated information network user unit (ISUP) message to the destination exchange until receiving a termination type message according to the initial address message (IAM). A fifth function of transmitting data including the call / call number and the unique ID of the destination exchange based on the exchange ID received from the destination exchange in the process of performing the fourth function and the fourth function to the exchange operator system; According to the present invention, a computer-readable recording medium having recorded thereon a program for realizing a function is provided. Call tracking is possible on the basis of the included call / call number. The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment according to the present invention in detail. Figure 1 is a block diagram of an exchange system using the ISUP signal. The A network 110 and the B network 12 represent different networks of the same or different mobile communication systems, and the exchanges and the mobile stations 111 to 117 and 121 to 127 constituting each network are mutually connected by the gateway exchange 130. Connected. Each exchange exchanges messages via the ISUP protocol.

That is, when the subscriber mobile station 117 belonging to the A network 110 wants to set up a call to the subscriber mobile station 127 belonging to the B network 120, the mobile station 117 transmits to the switching station 113 through the base station (not shown). When the call forwarding / receiving number is transmitted, the exchange 113 transmits the call forwarding / receiving number to the switching center 125 of the B network 120 through the gateway switching station 130 by including the calling / calling number in the initial address message (IAM). . The exchange station 125 receiving the IAM transmits an ACM (Address Complete Message) to the calling exchange station 113 to confirm receipt, and receives an ANM (ANswer Message) when the hook-up signal is received from the destination terminal 127. It transmits to the calling exchange 113.

If either of the originating mobile station 117 and the terminating mobile station 127 generates a hook-off signal after the traffic channel is established, the competent exchange-the originating exchange 113 or the terminating exchange 125-sends a RELese message (REL) to the other exchange. The other exchange receives the RLC (ReLese Complete message) to confirm receipt. The ISUP message includes the unique ID of the message originating exchange. In this figure, although each network is composed of three switches and is connected through one gateway exchange, in practice, a large number of exchanges exist in the network and relay calls from one network to the other network. Since it is common to go through many gateway exchanges in the course of processing, it is common for at least two exchanges to intervene between the originating exchange 113 and the destination exchange 125. Fig. 2 performs a call tracking method according to the present invention. It is a block diagram of the exchanger. As shown in the figure, the exchange includes an Access Switching Subsystem for Trunk (ASS-T) 201 connected to an Operation Maintenance I / O Device (OMID) 211 of the operator system. ) And a common line signaling subsystem (Access Switching Subsystem for No. 7, ASS-No. 7) 203. In order to process the relay call of the ISUP service, the ASS-T 201 may use a Mobile Call Trace (MCT) 205, a Trunk Call for No. 7 (TC7) 207, and a Trunk Interface for No. 7 (TI7) 209. ) Has a process block.

The MCT 205 receives the call tracking target number input by the exchange operator from the OMID 211 and transmits the call tracking target number to the TC7 207 to request the call tracking. The TC7 207 has a function of performing normal relay call processing through ISUP message transmission and reception with the TI7 209 and a call tracking according to a call tracking request received from the MCT 205.

The normal call handling process can be divided into outgoing call and incoming call. In the case of outgoing call, TC7 207 transfers call / call number transmitted from originating mobile station 117 to IAM according to ISUP standard. Include, pack, and send to TI7 209. TI7 209 packs the IAM in raw data format and sends it to ASS-No.7 203 to transmit the IAM over the exchange period link to send originating exchange 113 and terminating exchange 125. Subsequent messages ACM, ANM, REL and RLC are exchanged to perform outgoing call processing. In case of incoming call, when TI7 209 receives / unpacks raw data format IAM from ASS-No.7 and transmits to TC7 207, TC7 207 complies with ISUP standard. Unpacking IAM sends the incoming / outgoing number included in IAM to the subsystem performing incoming call processing and call setup processing, and exchanges incoming messages ACM, ANM, REL, and RLC to receive incoming calls. The call tracking process determines whether the call / calling number included in the IAM and the call tracking target / calling number required by the MCT 205 match each other in the normal relay call processing. If the called number is subject to call tracking, the exchange is sent / displayed to the OMID 211 by sending / displaying the originating exchange and called exchange information to the OMID 211 based on the unique ID of the originating / exchanging exchange included in the ACM, ANM, REL, and RLC exchanged for subsequent messages Report to the operator. A flow diagram illustrating a method of call trace on the originating exchange. In the call tracking method in the originating exchange 113 according to the present invention, after performing the call setup process and the routing process according to the call setup request of the originating mobile station 117, the calling / calling number transmitted by the calling mobile station 117 is TC7. 207 starts from the process of receiving (S301). The TC7 207 compares the call / called number previously received from the OMID 211 and the call / call number requested for call tracking through the MCT 205 with the call / called number received in the step S301 and received in step S301. It is determined whether the called number is the call tracking target (S303). If it is determined that the call tracking target is not the target outgoing call processing process described in Fig. 2 is performed (S305). As a result of the determination in step S303, if the call / call number received in step S301 is the call tracking target, the call tracking process is started (S307). First, when the TC7 207 includes the incoming / outgoing number received in step S301 in the IAM, packs it, and sends it to the TI7 209, the TI7 209 packs the IAM in a raw data format. packing) to transmit to the power through ASS-No.7 (203) (S309), outgoing call processing by exchanging subsequent messages ACM, ANM, REL and RLC between the originating exchange 113 and the destination exchange 125. It is performed (S311). In the message exchange process, when the TC7 207 recognizes the unique ID of the destination exchange 125 included in the message and transmits the call trace result to the MCT 205, the MCT 205 sends the call trace result to the OMID 211. The call trace result is reported by transmitting the information to the exchange operator CRT (S313). Therefore, the call tracking result includes the originating / called number and the unique ID of the originating exchange / terminating exchange which are the call tracking targets. Fig. 4 is a flowchart showing a call tracking method in the destination exchange. The call tracking method in the destination exchange 125 according to the present invention starts from the process (S401) in which the TI7 209 receives an IAM in the form of raw data format from the large power through ASS-No.7 203. do. The received data is unpacked by the TI7 209 into an IAM of ISUP standard and unpacked by the TC7 207 to confirm the called / called number included in the IAM. TC7 207 compares the incoming / outgoing number received in step S401 with the incoming / outgoing number identified in step S401 and the incoming / outgoing number previously inputted from OMID 211 and requested for call tracking through MCT 205. It is determined whether the number is a call tracking target (S403). If the determination result is not the call tracking target, the normal incoming call processing process described in FIG. 2 is performed (S405). As a result of the determination in step S403, when the call / calling number identified in step S401 is the call tracking target, the call tracking process is started (S407). First, the TC7 207 transmits ACM, ANM, REL, and RLC, which are subsequent messages of the IAM, to the power station to perform ISUP signal processing between the originating exchange 113 and the destination exchange 125 (S409). In the message exchange process, when the TC7 207 recognizes the unique ID of the originating exchange 113 included in the message and transmits the call trace result to the MCT 205, the MCT 205 sends the call trace result to the OMID 211. The call tracking result is reported by transmitting the information to the exchange operator CRT (S411). Therefore, the call tracking result includes the calling / called number and the unique ID of the calling / exchanging exchange that are the call tracking targets. ROM, floppy disk, hard disk, magneto-optical disk, etc.) The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and is not limited to the technical spirit of the present invention. It will be apparent to those skilled in the art that various substitutions, modifications, and alterations are possible in the art.

As described above, the present invention can be traced to the call passing through the various exchanges in the outgoing exchange and the incoming exchange period, it is possible to grasp the call state and the outgoing exchange and the destination exchange of the call.

Claims (6)

A call tracking method using a common line signaling system integrated information network user unit (ISUP) message applied to a switching system of a mobile communication network, A first step of receiving a called / called number transmitted by the calling mobile station and performing a routing process to the called exchange to which the called mobile station belongs; A second step of determining whether the received call / calling number is a call tracking target and performing a normal outgoing call processing if the call tracking target is not a call tracking target; A third step of transmitting an initial address message (IAM) including the received call / call number to the called exchange when the call / call number received in the first step is a call tracking target as a result of the determination of the second step; Exchanging a common line signaling method integrated information network user unit (ISUP) message with the destination exchange until receiving an end type message according to the initial address message (IAM); And A fifth step of transmitting data including the call / call number and the unique ID of the called exchange to the exchange operator system based on the unique exchange ID received from the called exchange in the fourth step; Call tracking method at the originating exchange comprising a. The method of claim 1, The second step is Determining whether or not it is a call tracking target based on a call / call number received from the exchange operator system Call tracking method at originating exchange. A call tracking method using a common line signaling system integrated information network user unit (ISUP) message applied to a switching system of a mobile communication network, A first step of receiving, from a large station, an initial address message (IAM) transmitted by an originating exchange to which an originating subscriber belongs and including an originating / called number; A second step of determining whether the received call / calling number is a call tracking target and performing normal incoming call processing and call setup processing if the call tracking target is not a call tracking target; If the call / call number of the first step is a call tracking target as a result of the determination of the second step, the common line signaling method integrated information network user unit (ISUP) until the termination type message is received according to the initial address message (IAM). Exchanging a message with the originating exchange; And A fourth step of transmitting data including the origin / call number and the unique ID of the originating exchange to the exchange operator system based on the exchange unique ID received from the originating exchange in the third step; Call tracking method in the destination exchange comprising a. The method of claim 3, The second step is Determining whether or not it is a call tracking target based on a call / call number received from the exchange operator system Call tracking method at the destination exchange. In an exchange having a processor for call tracking in an originating exchange using a common line signaling system integrated information network user part (ISUP) message applied to a switching system of a mobile communication network, A first function of receiving a calling / called number transmitted by the calling mobile station and performing a routing process to the called exchange to which the called mobile station belongs; A second function of determining whether the received call / calling number is a call tracking target and performing a normal outgoing call processing if the call tracking target is not a call tracking target; A third function of transmitting an initial address message (IAM) including the received call / call number to the call exchange when the call / call number received in the first function is a call tracking target as a result of the determination of the second function; A fourth function of exchanging a common line signaling method integrated information network user part (ISUP) message with the destination exchange until receiving an end type message according to the initial address message (IAM); And A fifth function of transmitting data including the origin / call number and the unique ID of the called exchange to the exchange operator system based on the exchange unique ID received from the called exchange in the process of performing the fourth function; A computer-readable recording medium having recorded thereon a program for realizing this. In the exchange having a processor for call tracking in the destination exchange using the common line signaling system integrated information network user unit (ISUP) message applied to the switching system of the mobile communication network, A first function for receiving from the large station an initial address message (IAM) transmitted by the originating exchange to which the originating subscriber belongs and containing a called / called number; A second function of determining whether or not the received call / destination number is a call tracking target and performing normal incoming call processing and call setup processing if the call tracking target is not a call tracking target; If the caller / caller number of the first function is a call tracking target as a result of the determination of the second function, the common line signaling method integrated information network user unit (ISUP) until the end type message is received according to the initial address message (IAM). A third function for exchanging a message with the originating exchange; And A fourth function of transmitting data including the call / call number and the unique ID of the originating exchange to the exchange operator system based on the exchange unique ID received from the originating exchange in the process of performing the third function; A computer-readable recording medium having recorded thereon a program for realizing this.