KR100898611B1 - How to track the location of VIP internet call caller - Google Patents

Abstract

The present invention relates to a location tracking system and a location tracking method of a VIP internet call sender, and, in a VOIP internet call system through a packet network, an emergency call server for checking the IP address of a VOIP terminal that has sent a call signal for a call; IP-DB which stores geographical address information assigned IP address, and IP address module which searches geographical address information corresponding to IP address transmitted from emergency call server in IP-DB and transmits the search result to call recipient. It will include.

Description

Purchasing position method about caller in VOIP internet communication}

1 is a block diagram showing a conventional VOIP Internet call system,

2 is a flowchart sequentially illustrating a conventional VOIP Internet call process;

3 is a block diagram showing a caller's location tracking system according to the present invention;

4 is a flowchart sequentially showing a location tracking method according to the present invention;

5 is a flowchart showing one embodiment of the IP assignment position checking step in the present invention,

6 is a block diagram showing the configuration of an emergency call server according to the present invention.

The present invention relates to a location tracking system and a location tracking method of a VIP Internet call originator.

Internet call is a technology that aims to fully implement telephone and telephone application services on the Internet using Voice over Internet Protocol (VoIP) technology. Since the emergence of PC-to-PC Internet telephony applications, the number of applications has been increasing to account for a large part of long-distance telephone service, and voice quality has improved a lot, and VoIP technology will lead the future voice communication.

Internet phones, initially launched as PC-PCs, have made great strides in phone-to-phone service due to long-distance charges. This service is very simple in terms of system configuration, ensures solid sales, and reduces the burden of initial subscriber recruitment. Therefore, Internet Telephony Service Providers (ITSPs), which have already occupied the market in the international telephony sector, have established international VoIP networks. Built.

Following the phone-to-phone service, the craze is the web-to-phone. In particular, free web-to-phone has emerged as a strategy to secure subscribers of Internet service providers, which is rapidly changing the voice communication market. Web-to-phone has problems such as sound quality deterioration and inconvenience of incoming call in PC environment, but the recognition has been renewed with the appearance of telephones (IP-Phone; VOIP terminals) operating in packet networks.

The VOIP terminal uses PC-to-Phone technology internally while maintaining the form of the phone familiar to users, thus foretelling the opening of the era of VoIP communication.

Internet calls are growing rapidly in terms of technology and marketability with the advent of VOIP terminals and IP-Centrex, and IP-Centrex can control VOIP terminals virtually connected via the Internet as if they were housed in a telephone exchange. It is expected to gradually replace PBX as it can provide additional functions.

Here, VOIP is a kind of protocol that enables voice communication using IP (Internet Protocol), and VOIP internet call is a communication service currently commercialized based on VOIP internet call system constructed by applying VOIP.

Voice over IP, which stands for VOIP, refers to a technology that enables voice communication on a Packet Switch Network that is currently used as a data network.

1 is a block diagram illustrating a conventional VOIP internet call system, and FIG. 2 is a flowchart sequentially illustrating a conventional VOIP internet call process.

Conventional VOIP Internet communication system is a VOIP terminal connected to a packet network or IP network called the Internet, a telephone terminal connected to a PSTN called a circuit network or a telephone network, and the Internet relaying communication within the IP network or communication between the IP network and the PSTN. It consists of a gateway system 10.

The Internet gateway system 10 performs not only call intermediation when the communication means of the sender and the receiver are VOIP terminals, but also call intermediation when the communication means of the caller or the receiver is the VOIP terminal and the telephone terminal, respectively.

Hereinafter, a description will be given of a call process performed in a VOIP Internet call system environment, but the case where a call terminal receives a call signal transmitted from a VOIP terminal will be described as an example.

S10; Enter your phone number

The sender enters the telephone number of the receiver to be called on the VOIP terminal. When the VOIP terminal also operates a hook by lifting a handset like a general telephone terminal, the Internet gateway system 10 waits for reception of data transmitted from the VOIP terminal.

S20; Receiving destination confirmation step

The telephone number entered by the caller in the VOIP terminal is transmitted to the Internet gateway system 10 through the IP network.

The main control process unit (MCPU) of the Internet gateway system 10 checks the hook signal transmitted from the VOIP terminal and the telephone number of the receiver, and provides a trunk gateway (TG) for converting the voice data format. Choose.

The trunk gateway (TG) is a device used in conjunction with a circuit-switched network (circuit network) switch and transmits a packetized TDM trunk line to a packet network under the control of a soft switch (SSW) or performs a reverse function. At this time, it plays a role of transferring call connection control and bearer data between the packet network and the circuit network.

The trunk gateway (TG) is important as the communication network evolves from the circuit to the packet-based, and is a transitional current communication network in which the circuit network and the packet network are mixed, which is a step before moving to an all IP-based packet network. Is essential.

On the other hand, softswitch (SSW) is a software-oriented intelligent switching device that controls the call processing of media gateways that bridge the circuit and packet networks.Initially, softswitch (SSW) is mainly focused on signaling interworking of packet networks and building a programmable service platform. However, the focus was on the possibility of providing packet-based IP services, and then expanded its applicability as a distributed switching / control platform for circuit-to-packet call processing conversion. This is a pivotal model of an open control switch platform that separates a transmission unit (trunk gateway; TG) and a control unit (soft switch; SSW) of the existing exchange model.

S30; Call request step

The trunk gateway (TG) operates the corresponding H.323 protocol, and the main control unit (MCPU) receives a receiver telephone number transmitted from the caller's VOIP terminal and requests a call setup together with an H.323 call setup message.

S40; Routing steps

The gate keeper (GK), which has been requested to set up a call, searches for an IP address corresponding to the telephone number of the receiver by setting up a communication path by referring to routing table information stored in its memory.

Here, the gatekeeper (GK) is a control server used to provide Internet telephony service. It is one of the functions defined in ITU-T Recommendation H.323, and manages and responds to telephone numbers and IP addresses. The Internet gateway system receiving a call from the VOIP terminal is an Internet gateway that manages the destination VOIP gateway or the recipient's telephone terminal, which is the H.323 terminal, through the gatekeeper (GK) based on the entered recipient's telephone number. Inquire the system's IP address.

S50; Call signal outgoing step

The Internet gateway system 10 converts the data transmission format transmitted from the sender's VOIP terminal into a dedicated PSTN through a trunk gateway (TG) and a soft switch (SSW) and transmits the data to the receiver's telephone terminal.

Call processing for the recipient telephone terminal in the PSTN is a well known technique, and thus detailed description thereof is omitted here.

'SG', which has not been described, is a 'signaling gateway' and is a device that performs a function of transmitting signaling messages between signaling stations using an IP core network. Through signaling gateway (SG), it is possible to deliver signal message in real time without loss and performs functions such as interface matching between systems and generation of statistical information.

In the VOIP Internet call system described above, when voice and fax communication are handled in a data network, communication can be performed at a lower price than conventional PSTN fax transmission, and the equipment cost can be greatly reduced. Many companies, including telecommunications companies, are currently looking for solutions to reduce the cost of long distance calls, head-to-point and branch office calls, or local calls. Most companies have a VOIP network.

However, the VOIP Internet call system having such an advantage has a problem that the appropriate emergency communication service is not provided.

In the case of the PSTN, when a caller attempts to call an emergency service center such as '119' in an emergency, the caller tracks the caller's phone number and transmits a call signal to the 119 command room in the jurisdiction. That is, the call is directly connected to the 119 command room in the area where the caller is located.

However, in the case of the conventional VOIP Internet call system, the caller's location is determined based on the address registered by the caller first.If the caller originates from a place other than the address registered by the caller, the caller's current location is not the first 119 command room. The call is routed to the 119 command room in the jurisdiction of the calling party address registered in. As a result, the caller informs the caller of the 119 command room of his current location, and the caller of the 119 command room causes inconvenience to turn the line to the jurisdiction 119 command room of the caller's current location. However, in an emergency situation, the addition of such a call procedure may pose a great risk.

On the other hand, in the call through the PSTN, even if the caller does not directly inform the location information, the 119 command room can check the location of the caller to actively provide emergency services. However, the conventional VOIP internet calling system is unable to track the caller's location. Eventually, if the caller changes location and uses VOIP Internet call system, the receiver providing emergency service receives the location information registered at the time of initial sign-up, not the information about the caller's changed location, and the caller is sent to the current location. If the information is not delivered or cannot be delivered, there is a problem that the appropriate emergency service cannot be provided to the sender.

Accordingly, the present invention has been invented to solve the above problems, the location tracking system and location tracking method of VIP Internet call sender to be able to receive prompt emergency service by checking the location information of the caller when using the VOIP Internet call The technical task of this is to provide.

The present invention to achieve the above technical problem,

In a VOIP Internet call system through a packet network, an emergency call server that checks the IP address of the VOIP terminal that has sent a call signal for a call, an IP-DB that stores geographical address information assigned an IP address, and an emergency call server It is a location tracking system of a VIP internet call originator that includes an IP verification module for retrieving geographical address information corresponding to the transmitted IP address from the IP-DB and transmitting the search result to the call receiver.

In order to achieve the above technical problem, the present invention, in the location tracking system of the VIP Internet call sender,

The VOIP Internet telephony system supports the H.323 and SIP protocols for compatibility.

The present invention to achieve the above technical problem,

In VOIP Internet Calling System over Packet Network,

Receiving, by a MCPU of the VOIP Internet call system, a call signal transmitted from a VOIP terminal;

An outgoing IP verification step of the emergency telephone server communicating with the main control unit (MCPU) checking the IP address of the VOIP terminal and transmitting it to the IP verification module;

The IP verification module may include: an IP assignment location checking step of retrieving geographical address information corresponding to the IP address transmitted from an emergency call server in an IP-DB storing geographical address information assigned an IP address; And

The IP identification module is a location information transmission step of transmitting the retrieved geographical address information to the call recipient with a call signal;

The location tracking method of the VIP internet call sender including a.

In order to achieve the above technical problem, the present invention, in the location tracking method of the VIP Internet call sender,

The main control unit (MCPU) checks the telephone number of the receiver sent from the VOIP terminal, the emergency call confirmation step so that the calling IP confirmation step, IP assignment location confirmation step and location information transmission step proceeds only in the case of a designated phone number It is to include more.

In order to achieve the above technical problem, the present invention, in the location tracking method of the VIP Internet call sender,

If the IP address is a fixed IP, the step of checking the IP assignment position

An IP address verification step of performing the IP assignment location checking step when the IP verification module checks the IP address for the calling number in the IP-DB and is identical to the stored information; And

In the IP address verification step, if the IP address and IP-DB information for the calling number is different, if the same IP address is found by searching the same IP address in the IP-DB, the IP assignment location checking step Searching the same IP address to proceed;

It is to include more.

In order to achieve the above technical problem, the present invention, in the location tracking method of the VIP Internet call sender,

If the IP address for the calling number does not exist in the IP-DB in the same IP address search step, the method further includes an address input request step of outputting an address input request message to the sender's VOIP terminal.

The present invention to achieve the above technical problem,

In a VOIP Internet call system in which a plurality of emergency service systems having the same reception number but having a communication path are separated by region, communicate through a communication network including a packet network,

Receiving, by a MCPU of the VOIP Internet call system, a call signal of a VOIP terminal to which a reception number of the emergency service system is input;

An outgoing IP verification step of the emergency telephone server communicating with the main control unit (MCPU) checking the IP address of the VOIP terminal and transmitting it to the IP verification module;

The IP verification module may include: an IP assignment location checking step of retrieving geographical address information corresponding to the IP address transmitted from an emergency call server in an IP-DB storing geographical address information assigned an IP address;

The main control unit (MCPU) is a call request step for receiving a call from the caller's VOIP terminal to receive a call setup request;

A gatekeeper requesting a call establishment, the routing step of establishing a communication path to a competent emergency service system corresponding to geographical address information of the identified IP address; And

A call signal sending step of sending a call signal of the VOIP terminal according to a set communication path;

The location tracking method of the VIP internet call sender including a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram showing a location tracking system of a caller according to the present invention, and FIG. 4 is a flowchart sequentially showing a location tracking method according to the present invention.

The location tracking system according to the present invention includes an Internet gateway system 10 'having an Emergency Call Server (ECS) for emergency call processing, and a telephone terminal for telephony with the Internet gateway system 10'. 21 and an emergency service system 20 including an IP verification module 22 for confirming a location through IP address verification of the sender and an IP-DB 23 for storing location information corresponding to the IP address. .

3 shows that the IP verification module 22 and the IP-DB 23 are included in the emergency service system 20, this is only an embodiment according to the present invention, and the IP verification module 22 is shown. ) And the IP-DB 23 are included in the Internet gateway system 10 'so that the entire process of checking the sender's IP address and the geographical location based on the verified IP address is performed in the Internet gateway system 10'. In this case, the emergency service system 20 may be merely to receive the geographical location information of the confirmed caller.

The location tracking method according to the present invention by the location tracking system having the above-described configuration will be described, and the location tracking system will be embodied.

S10; Enter your phone number

The caller enters the emergency service telephone number into the VOIP terminal to receive emergency services.

S20; Receiving destination confirmation step

The telephone number entered by the caller in the VOIP terminal is transmitted to the Internet gateway system 10 'through the IP network.

Since the process description has been described in detail above, the description thereof is omitted here.

S22; Emergency call verification step

If it is confirmed that the telephone number entered by the caller is an emergency service telephone number, the main control unit MCPU transmits a processing message to the emergency telephone server ECS through the soft switch SSW.

S24; Outgoing IP Verification Step

Through the process message sent from the soft switch (SSW), the emergency call server (ECS) performs the following following procedure.

First, check the caller's calling number.

In general, the outgoing phone number is given a unique number by the caller submitting an application containing his / her personal information, and the outgoing phone number and personal information are recorded together.

Therefore, the emergency service system 20 can verify the personal information including the address using the outgoing phone number after confirming the outgoing phone number of the caller, so even if the caller does not directly inform his location, the emergency caller can check the location of the caller. This is possible.

In particular, the PSTN needs to change the phone number or coordinate the connection between the phone terminal and the PSTN when the caller moves, etc., so that the phone number and personal information (address) associated with the phone number are always accompanied. Therefore, by tracking the outgoing phone number and confirming the personal information associated with it, it is possible to track the location of the caller with high reliability.

By the way, in the case of a VOIP internet call, if the place can be connected to the Internet, the internet call can be made simply by connecting the VOIP terminal to the internet and inputting an ID of a user (sender). After all, if a caller makes an Internet call and calls an emergency service at a location other than the address at the time of first sign-up using the VOIP terminal, the address at the time of sign-up is printed as personal information even if the caller's phone number is checked. do. In other words, the caller may not be provided with an appropriate emergency service in case of lack of reliability of the caller's location tracking.

Second, check the sender's calling IP.

In order to overcome the limitations of the outgoing telephone number verification method described above, the location tracking system and the location tracking method according to the present invention, when the caller attempts to make an Internet call using the VOIP terminal, the IP verification module 22 determines the caller's outgoing IP. Check it.

As shown in Table 1, the IP address system is divided into classes A, B, C, D, and E, of which A, B, and C are generally used.

class Address range Usage A 0.0.0.0-127.255.255.255  General purpose use B 128.0.0.0-191.255.255.255 C 192.0.0.0-223.255.255.255 D 224.0.0.0 ~ 239.255.255.255 Multicast E 240.0.0.0-255.255.255.255 Research purpose

The IP address consists of two parts representing the network and the host. The network represents a specific entity and the host is a computer installed on that network. Therefore, checking the network portion of the IP address can identify the location of the network where the IP address is being used.

Therefore, the location tracking system according to the present invention confirms the current location of the caller by checking the IP address instead of tracking the caller's calling number.

S26; IP assignment location confirmation step

The IP verification module 22 searches the IP-DB 23 based on the IP address transmitted through the communication network (including the packet network and the circuit network) to track the sender's location.

IP is divided into fixed IP and floating IP. Static IP is always assigned the same IP address when accessing the Internet through the same route, and Dynamic IP is to assign IP address flexibly to the Internet access route in the same network. Recently, as the number of Internet users has increased due to the spread of the Internet, the floating IP method is widely used to efficiently manage a limited resource of IP address.

Therefore, when the sender's IP address is a fixed IP, the location can be tracked most accurately. In the case of a floating IP, the location may be expanded within the geographical range of the network including the corresponding floating IP.

S30; Call request step

The trunk gateway (TG) operates the corresponding H.323 protocol, and the main control unit (MCPU) receives a receiver telephone number transmitted from the caller's VOIP terminal and requests a call setup together with an H.323 call setup message.

S40; Routing steps

The gate keeper (GK), which has been requested to set up a call, searches for an IP address corresponding to the telephone number of the receiver by setting up a communication path by referring to routing table information stored in its memory. That is, the communication route is established to the emergency service center having jurisdiction of the caller's IP address.

S50; Call signal outgoing step

The Internet gateway system 10 converts the data transmission format transmitted from the sender's VOIP terminal into a dedicated PSTN through a trunk gateway (TG) and a soft switch (SSW) and transmits the data to the receiver's telephone terminal.

Subsequently, the location tracking method of the VIP internet call sender according to the present invention checks the current location information of the sender and sends it to the receiver, or the receiver can directly check the location information through the IP address of the sender.

To this end, the location tracking method according to the present invention further includes a location information transmitting step (S28).

S28; Location information transmission step

When the caller's location is confirmed through the above-described process, the sender's location information is transmitted to the monitor of the emergency service person so that the emergency service can be provided quickly.

5 is a flowchart illustrating an embodiment of an IP assignment location checking step in the present invention, which will be described with reference to the drawing.

In the following example, it may be applied when the sender's IP address is a fixed IP.

S110, S120; IP address verification step

The caller ID and IP address checked in the caller IP verification step (S24) are compared with the caller's caller ID and IP address stored in the IP-DB 23 to check whether they are the same.

As a result of the check, if the two calling numbers and the IP address are the same, the location information transmitting step S28 is performed.

S130, S140; Same IP Address Search Step

If the result of the IP address verification step (S110, S120), the sender's IP address stored in the IP-DB (23) and the sender's current IP address confirmed in the caller's IP verification step (S24) is not the same , The current IP address is retrieved from the IP-DB (23).

As a result of the search, if the current IP address exists in the IP-DB 23, the geographical address associated with the searched IP address is confirmed, and the location information transmission step S28 is performed.

If it is not the same, proceed to the next step.

S150, S160; Address input request step

As a result of searching the same IP address, the same address as the current IP address is not searched, and the sender is prompted to enter the address of the current location to change the sender's personal information, and the address input and change are completed. When the location information transmission step (S28) proceeds.

However, the guidance method is not limited to the address input request steps S150 and S160.

That is, in another embodiment of the present invention, the guidance of inputting the address of the current location may be performed through a separate message call (voice guidance) during or after the call.

S170; Warning output stage

In the address input request step (S150, S160), if the caller refuses or inputs the address input, the caller can be alerted by outputting a warning message that the appropriate emergency service cannot be received.

The majority of Internet phone service providers, both at home and abroad, use H.323 call processing, but this is the subject of controversy. Because H.323 only considers LAN environment, includes not only voice but also multimedia communication, and includes a fairly complicated procedure, a simpler and more flexible protocol is required to build a large Internet telephony network at the SCN level.

The Session Initiation Protocol (SIP) defined by the IETF (RFC 2543) is a protocol for call connection between components. Since it uses simple messages, it is easy to develop and has the advantage of sending signaling messages including SCNs.

Accordingly, the location tracking system and the location tracking method of the VIP internet call originator according to the present invention may be able to recognize not only H.323 format but also SIP protocol.

Figure 6 is a block diagram showing the configuration of an emergency call server according to the present invention, will be described with reference to this. At this time, the emergency call server (ECS) is configured as follows, the case where the SIP protocol is applied will be described with an example.

The stack module is a core processor of an emergency call server (ECS), which processes processing messages transmitted from the soft switch. The stack module provides SIP UA functions necessary for providing SIP UA (User Agent) function and development of intelligent end-to-end communication service, and provides SDP (Session Description Protocol) and RTP (Real time) to transmit voice. It is a processor that supports Transport Protocol) / RTCP (RTP Control Protocol).

The scenario module is a processor that processes a scenario. The scenario module is a processor that analyzes a processing message from the stack module and determines which service is actually processed. All processors in an emergency call server (ESC) can communicate with the scenario module to know what to do. As an example of the service, when the subscriber's outgoing telephone number is transmitted from the stack module to the scenario module, the scenario module transmits the subscriber's outgoing telephone number to the following DB control module to obtain subscriber information.

Media module is a module that can recognize DTMF tone on voice band processing and VOIP using Dialogic's HMP library.

DB control module is a module that brings subscriber information in conjunction with the IP-DB (23).

The management module is a processor that collects logs or status information of each processor of the emergency call server through the IPC and periodically checks the HDD, memory and CPU usage of the emergency call server (ECS). This module checks the state of (ECS).

According to the present invention as described above, it is possible to track the current calling position of the caller when the phone call through the VOIP terminal, there is an effect that the caller can be provided quickly emergency services, etc. without delivering their location.

Claims (7)

delete delete In VOIP Internet Calling System over Packet Network, Receiving, by a MCPU of the VOIP Internet call system, a call signal transmitted from a VOIP terminal; An outgoing IP verification step of the emergency telephone server communicating with the main control unit (MCPU) checking the IP address of the VOIP terminal and transmitting it to the IP verification module; The IP verification module may include: an IP assignment location checking step of retrieving geographical address information corresponding to the IP address transmitted from an emergency call server in an IP-DB storing geographical address information assigned an IP address; And The IP identification module is a location information transmission step of transmitting the retrieved geographical address information to the call recipient with a call signal; Including, but if the IP address is a fixed IP, the step of confirming the IP assignment location, if the IP verification module checks the IP address for the calling number in the IP-DB and the same as the stored information, the IP assignment location check IP address verification step of proceeding; And when the IP address and the IP-DB information of the calling number are different in the IP address checking step, searching for the same IP address in the IP-DB and checking the IP assignment location if there is the same IP address. Location tracking method of the VIP Internet call sender further comprising the step of searching for the same IP address proceeding. The method of claim 3, wherein If the IP address for the calling number does not exist in the IP-DB in the search for the same IP address, the VIP IP further comprises an address input request step of outputting an address input request message to the caller's VOIP terminal. How to track the location of Internet callers. In VOIP Internet Calling System over Packet Network, Receiving, by a MCPU of the VOIP Internet call system, a call signal transmitted from a VOIP terminal; An outgoing IP verification step of the emergency telephone server communicating with the main control unit (MCPU) checking the IP address of the VOIP terminal and transmitting it to the IP verification module; The IP verification module may include: an IP assignment location checking step of retrieving geographical address information corresponding to the IP address transmitted from an emergency call server in an IP-DB storing geographical address information assigned an IP address; The IP identification module is a location information transmission step of transmitting the retrieved geographical address information to the call recipient with a call signal; And The main control unit (MCPU) checks the telephone number of the receiver sent from the VOIP terminal, emergency call confirmation step so that the calling IP confirmation step, IP assignment location confirmation step and location information transmission step proceeds only in the case of a designated phone number ; Including, but if the IP address is a fixed IP, the step of confirming the IP assignment location, if the IP verification module checks the IP address for the calling number in the IP-DB and the same as the stored information, the IP assignment location check IP address verification step of proceeding; And when the IP address and the IP-DB information of the calling number are different in the IP address checking step, searching for the same IP address in the IP-DB and checking the IP assignment location if there is the same IP address. Location tracking method of the VIP Internet call sender further comprising the step of searching for the same IP address proceeding. The method of claim 5, wherein If the IP address for the calling number does not exist in the IP-DB in the search for the same IP address, the VIP IP further comprises an address input request step of outputting an address input request message to the caller's VOIP terminal. How to track the location of Internet callers. delete

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