KR20010029677A - A internet phone service system and method using public switching telephone network terminal - Google Patents

Abstract

PURPOSE: An Internet phone service system using PSTN/ISDN(Public Switched Telephone Network/Integrated Services Digital Network) terminal and a method thereof are provided to implement a terminal mutually connecting an Internet network and the PSTN/ISDN, and to make an incoming party perform a speech response for a speech attempt request of an originating party through the Internet phone service using the terminal in real time. CONSTITUTION: An originating terminal transmits Internet phone connection information by Internet phone driving according to a call origination request of a user. If the transmission is responded, and the Internet phone connection information and connection signal receiving of an incoming terminal are performed, the originating terminal forms a speech path with the incoming terminal by referring to the received Internet phone connection information. An Internet phone server(40) searches whether the incoming terminal is connected to the Internet according to the transmission of the call origination request and the Internet phone connection information of the originating terminal, and requests Internet phone driving or the incoming terminal through the PSTN/ISDN(Public Switched Telephone Network/Integrated Services Digital Network). And the Internet phone server(40) transmits the Internet phone connection information of the incoming terminal to the originating terminal according to Internet phone driving results. An incoming terminal transmits Internet phone connection information by Internet phone driving according to a request of Internet phone driving. If the transmission is responded, and the Internet phone connection information and connection confirming signal receiving of the originating terminal are performed, the incoming terminal forms a speech path with the originating terminal by referring to the received Internet phone connection information.

Description

Internet phone service system and method using public switched network terminal {A INTERNET PHONE SERVICE SYSTEM AND METHOD USING PUBLIC SWITCHING TELEPHONE NETWORK TERMINAL}

The present invention relates to an Internet phone service system, and more particularly, to an Internet phone system and a method for performing an Internet phone service of a telephone-to-phone using a public switched network (PSTN, ISDN) terminal.

The telephone call service through the Internet network, that is, the Internet phone service, which is commonly used, is generally implemented in two forms.

The first is the Internet phone service method of making a call between the computer and the computer through the operation of the built-in Internet phone program, and the second is an Internet phone service method of making a call by directly connecting the call path between the phone and the telephone period.

However, in the case of the above-described Internet phone service method, which has been generally performed, each of the following users has problems of inconvenience in use and complexity of operation.

Specifically, the method of PC-to-PC Internet phone service proposed as the first method basically requires additional equipment such as a high-performance PC and a sound card for performing a voice call. In addition, the problem of the increase in the cost of purchasing the above equipment in the use of the Internet phone service, the difficulty in forming a call channel caused by the inherent characteristics of the Internet network, that is, the caller when making a call from the calling party, for example. The side must always be connected to the Internet network, and even in such a state, it is difficult to create such conditions as exchanging IP addresses with each other. In addition, there are many cases in which application programs for the Internet phone service used in the PC are different, in which case the compatibility is not guaranteed.

Next, in the case of the telephone-to-phone Internet phone service method, a user needs to select a separate telecommunication company that performs an appropriate Internet phone service in advance, and uses the Internet phone service through the corresponding telecommunication company. In addition, there is a problem that the fee must be paid quite high. In addition, the method of use for the user has also been a lot of inconvenience compared to the phone call through the existing phone. As an example, the service user may additionally perform a predetermined identification number input for performing an Internet phone service through a separate telecommunication company. In order to perform such a service, an Internet phone service provider must have a separate server for an Internet phone and a facility for performing an incoming call from the Internet phone server to a regular phone. There was also a problem such as an increase in service construction costs, such as rebuilding network infrastructure for processing.

In addition, the Internet phone service method between the PC-to-phone is proposed and implemented, but in this case, a gateway (Gate Way) equipment must be provided separately, and at the same time, a network must be constructed through such a gateway. However, because gateway equipment becomes expensive equipment, and the cost of network construction through it is also expensive, it raises the problem of increasing the cost to consumers or service providers using other Internet phone services in such a manner.

The above problems are caused by the fact that the Internet phone service is based on packet data switching operation, unlike line switching of a general telephone call. Nevertheless, the necessity of the service is greatly raised due to the cost reduction effect of the Internet phone service itself, and the development is expected to continue in the future.

As a result, in the case of the Internet phone service, which has been proposed and implemented in the related art, it has caused various inconveniences for the caller, and it is also very difficult to connect the call with the called party in real time when the call is required. .

Accordingly, an object of the present invention is to implement a terminal which establishes a connection between an internet network and a public switched network (PSTN, ISDN), and to make a call in real time by a called party in response to a call attempt request by the calling party through the Internet phone service using such a terminal. The present invention provides an Internet phone service system using the ISDN terminal and a method thereof, by which an answer can be made, and a telephone call through the internet network can be performed in real time according to the call response.

In order to achieve the above object, the present invention transmits Internet phone driving information and Internet phone connection information according to a call origination request of a user, and receives the Internet phone connection information and connection signal of a called terminal in response to the transmission. A caller terminal which forms a voice call path with the called party terminal with reference to the received Internet phone connection information; According to the call origination request of the calling terminal and the transmission of the Internet phone access information, it is searched whether the corresponding called terminal is connected to the Internet, and according to the result, it requests the driving of the called terminal through the public switching network. An Internet phone server for transmitting the Internet phone access information of the called party terminal to the calling party terminal according to the Internet phone driving result of the called party terminal; As a result of the detection of the call to the public switched network according to the request for driving the Internet phone, the operation of transmitting the Internet phone and the connection information of the Internet phone is transmitted, and the connection confirmation signal from the originating terminal and the connection information of the Internet phone transmitted in response to the transmission are made. In the case of the present invention, the receiving terminal forms a voice call path with the calling terminal, based on the received Internet phone access information.

1 is a block diagram of an Internet phone service system according to a preferred embodiment of the present invention.

Figure 2a is a flowchart of the operation of the Internet phone system according to a preferred embodiment of the present invention.

Figure 2b is a flowchart of the operation of the Internet phone system according to another preferred embodiment of the present invention.

3A, 3B, and 3C are detailed flowcharts of operations of the Internet phone service system for performing the Internet phone service shown in FIG. 2A.

4A, 4B, and 4C are detailed operational flowcharts of the Internet phone service system for performing the Internet phone service shown in FIG. 2B.

5 is an internal block diagram of an ISDN terminal for performing an Internet phone service according to an embodiment of the present invention.

6 is an internal block diagram of an Internet phone server for performing an Internet phone service according to a preferred embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing the present invention through the reference numerals added to the components of each drawing, it should be noted that the same reference numerals are used even when the same reference numerals are shown on the other drawings to indicate the same components.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, various configurations and names used may be different in the above description, but it is different from those of ordinary skill in the art by those skilled in the art. It can be seen that it does not mean that. And the embodiment according to the following detailed description will be included in the general content of the present invention described above.

First, Figure 1 shows a block diagram of an Internet phone service system using the Internet network according to a preferred embodiment of the present invention.

Before referring to FIG. 1, in the case of the Internet and public switched network interconnection terminal configured in the Internet phone service system according to the preferred embodiment of the present invention, a general telephone can be attached and used while satisfying the H.323 protocol. Has the characteristics. In the practice of the present invention the terminal is applied and implemented as an ISDN terminal. The ISDN terminal performs a phone call and data transmission through the connection of the ISDN network. In addition, the Internet phone server according to the preferred embodiment of the present invention supports the Internet phone-related call processing according to the gatekeeper function and whether the called terminal is connected to the Internet. In the preferred embodiment of the present invention, as the implementation of the Internet phone server as described above, it is possible to provide a cheaper and easier to use Internet phone service without using a gateway and a PC. In addition, the gatekeeper may be implemented as the Internet phone server in a preferred embodiment of the present invention, but may be implemented as a separate external device if necessary. Meanwhile, the basic technology of the Internet phone service is applied to satisfy the H.323 protocol proposed by the ITU mechanism and the SIP scheme of the IETF. In particular, the Internet phone service according to the H.323 protocol is more widely implemented than the SIP method.

Referring to the configuration of the Internet phone service system according to a preferred embodiment of the present invention with reference to Figure 1, it is provided with a telephone 10 connected to the public switched network and the Internet (IP) network directly to perform a voice call And a terminal 20 for interfacing the telephone to the Internet and, as a result, for voice communication via the Internet network. In a preferred embodiment of the present invention, the public switched network is applied as ISDN, and the terminal 20 is applied as an ISDN terminal. The terminal 20 is commonly referred to as a terminal adapter (TA), and in the practice of the present invention, the TA is applied as an ISDN terminal. And anyone freely connects to the Internet 30 where necessary data transmission and use of various computer network services are made. In addition, it is provided with an Internet phone server 40 which is connected to the Internet 30 and has its own IP address in the connected state and serves as an arbitration and processing of the Internet phone service. The Internet phone server 40 simultaneously performs functions such as user authentication and authorization, call routing, charging, and conversion between phone numbers and IP addresses. This is commonly referred to as a gate keeper function.

Referring to the configuration of the Internet phone service system to which the present invention is applied with reference to FIG. 1, the telephone 10 is connected to the ISDN terminal 20. The telephone 10 basically includes a handset, a handset, a ring generator, a DTMF tone generator, and the like as a means used directly by a user for a voice call. The user performs the use of the Internet phone service according to the present invention, and optionally the voice call through the ISDN network, the voice call through the public network through the telephone 10.

The ISDN terminal 20 connects to a comprehensive information communication network that integrates and provides various types of information such as voice and non-voice into one digital network. In connection, a D channel as a control channel and a B channel as a traffic channel are used, and the B channel has two channels. In addition, an Internet connection and an Internet phone service according to the present invention are performed through the PPP protocol. The driving program of the PPP protocol is embedded in the terminal 20.

In the implementation of the present invention, the ISDN terminal 20 drives the Internet phone according to the call origination request from the user and the call reception of the predetermined Internet phone driving identification information. It transmits its own Internet connection information, and forms a voice call path with reference to the Internet phone connection information of the called party in response to the transmission.

The Internet 30 is an open computer network network, which is freely accessible anywhere and at any time. The implementation of the Internet phone service is made through the application of the Internet 30. This is accomplished through a technology called VoIP. This technology is a technology for generating an effect such as a circuit network in a packet network, and becomes a technology for making a real-time call.

The internet phone server 40 is a server proposed according to the embodiment of the present invention. This mediates the interconnection between the calling terminal and the called terminal in performing and requesting Internet phone services. Arbitration is done through telephone number and IP address exchange between called party's terminals. The Internet phone server 40 according to the present invention is interlocked with the ISDN switch 50, between them connected in accordance with the ISDN scheme. It is connected in a 2B + D channel manner. In the practice of the present invention, the Internet phone server 40 establishes a connection with the Internet 30 and at the same time establishes a connection with an ISDN network. The ISDN switch 50 is connected to the ISDN terminal 20 to control the formation of the call and data transmission path of the ISDN terminal 20. On the other hand, in the practice of the present invention it will also be possible to apply the PSTN exchange in place of the ISDN exchange 50. In this case, use of the PSTN terminal is made, and corresponding data transmission and voice transmission services will be made.

The Internet phone server 40 according to the present invention receives a call origination request and Internet phone connection information according to the driving of an Internet phone transmitted from a predetermined calling party terminal, and includes a called party included in the received Internet phone connection information. Search whether the terminal registers the Internet phone access information. Next, according to the result of the Internet phone access information search, after transmitting the Internet phone driving identification information specified for the call origination through the public switched network and the Internet phone driving request of the called terminal, the Internet of the received calling terminal is received. In response to the transmission of the access information and the Internet phone driving identification information, the Internet connection information of the called terminal which is driven by the Internet phone is used to mediate the formation of the voice call between the two terminals.

The Internet phone access information is address information for internet phone connection between incoming and outgoing terminals through the Internet, which basically includes a phone number corresponding to the public network address of the terminal and an IP address corresponding to the address of the Internet network. Is done. In the practice of the present invention, the Internet phone access information is registered with the Internet phone server and includes the telephone number of the called terminal when there is an internet phone call of the calling terminal. When performing the Internet phone service according to the present invention, the Internet phone server searches for the Internet phone access information registered by the terminal as an Internet phone server, and transmits an IP address corresponding to the telephone number of the terminal to the called party. Enable internet phone access.

The Internet phone driving identification information used in the present invention is used in the case where the destination terminal is not connected to the Internet and the Internet connection information is not registered with the Internet phone server. Identification information used in controlling to register Internet phone connection information in the Internet phone server.

2A is a flowchart of an operation of an Internet phone system using an Internet network according to a preferred embodiment of the present invention. FIGS. 3A, 3B, and 3C are caller-side ISDN terminals 20 for performing the procedure shown in FIG. 2A. And a control flowchart of the Internet phone server 40.

The overall operation thereof will be briefly described with reference to the accompanying FIG. 2A. After the call attempt of the calling user (s1), the information of the receiving party is not registered in the Internet phone server, and thus the phone number received from the calling party is used to identify the Internet phone driving. A call attempt that includes a message indicating that there is an Internet phone request to the receiving terminal (s2). At this time, the receiving terminal releases the call and accesses the Internet, thereby providing Internet phone access information according to the operation of the Internet phone. Transmit (s3). After that, it follows the Internet phone procedure of two terminals connected to the Internet. The procedure is to notify the IP address of the calling terminal to the called party (s4), and after the called terminal confirms its own call, it notifies the calling party of the detection of the call and notifies the Internet phone server (s5), and the called party calls. In response to the fact that the answer and the destination IP address to the calling terminal and the sending operation (s6), the connection signal and the confirmation signal transmission of the called party and the calling party and the voice signal inter-transmission operation (s7) accordingly. The call attempt including the above-mentioned Internet phone driving identification information refers to a general voice call attempt through an ISDN network connected to a terminal, and uses a phone number, that is, a caller number of the Internet phone server 40 or a UUI (User). To User Information) and ISDN Sub Address Message. This is delivered through the D channel of ISDN. If the calling party number or UUI transmitted according to the call attempt matches the calling party number, UUI, and calling party subnumber previously stored in the called terminal, the called terminal sends the incoming call from the server to the Internet. Recognize it as a call attempt for a phone, and as a result, perform an Internet connection and hence Internet phone driving. In the practice of the present invention, the calling party number is mainly used, but when making such a call attempt as the UUI, the Internet phone server 40 uses the characteristics of the UUI having a small amount of data transmission / reception characteristics. And previously promised data are included in the message of the UUI to inform the operation of the Internet phone. In this case, too, the called terminal can perform processing for accessing the Internet phone. The sub address is an information element defined in Q.931 of the ITU. In case of using the sub address, information within 20 bytes is designated in advance and transmitted to the called terminal. The 20 byte is a data transmission amount of the sub-number defined in the ITU specification, and in the embodiment of the present invention, the sub-number includes a specific number for driving the Internet call attempt. The called terminal also performs the Internet phone driving process as the reception status in the state where the specific number is registered in advance.

The operation of the Internet phone service using the ISDN voice call shown in FIG. 2A will be described in more detail with reference to FIGS. 3A, 3B, and 3C. 3A is a control flow of a caller terminal according to a preferred embodiment of the present invention. FIG. 3B is a flow of control operation of an Internet phone server according to a preferred embodiment of the present invention. Control flow of the called terminal according to the embodiment.

First, in the case of the calling terminal, in step 3010, it is determined whether there is a call origination request in step 3011. In such a case, in step 3012, the calling party terminal accesses the Internet. In step 3013, the calling party terminal transmits Internet phone access information including the called party's telephone number and its own IP address and telephone number to the Internet phone server through the Internet. The called party number and calling party number are information according to a call attempt request, and the calling party IP address and calling party number are information obtained by registering the calling party as an Internet phone server. In step 3014, it is checked whether the Internet phone server is a call in response to the transmitted information. If the call is made according to the call acknowledgment, the call processing tone is generated by the telephone in step 3015, and in step 3016, reception of the answering state information of the called party is transmitted to the IP of the called party and the transmission of the outgoing call. Detect. If it is determined in step 3014 whether the call is made by the server and it is determined in step 3016 that the IP and response status information of the called party is not received, general ISDN call processing is performed. In this case, an attempt is made to make a call through an ISDN network corresponding to the transmitted called party number.

In step 3016, when the caller response state information of the called party according to the called party IP and the calling signal is received, the ringback tone is generated and processed in step 3017, and the call connection transmitted and received from the called party is received in step 3018. It is determined whether there is a signal, that is, a call connection signal Connect. Otherwise, ringback tone continues until the call connection signal is answered. When the call connection signal is received in step 3018, the call connection confirmation signal (Connect Ack) according to the confirmation of the call connection signal is transmitted to the called terminal in step 3019. Thereafter, in step 3020, a call path is formed with the called terminal, and in step 3021, a voice signal is transmitted and received through the formed call path. This state is a voice call state, and the call path becomes a call path through the Internet network. In step 3022, it is detected whether the call is terminated, and in such a case, the call is released in step 3023. In step 3024, the release of the Internet connection is notified to the Internet phone server. This is an operation of requesting the deletion of its own IP address and phone number registered in accordance with the call in the Internet phone server, and it is confirmed that the Internet connection is released by being deregistered.

In the case of the Internet phone server, in step 3030, it is determined whether there is a call origination request from the calling terminal in step 3031. Internet phone access information includes the calling party's telephone number and the calling party's IP and calling party's telephone number simultaneously with the called party's telephone number. Through this transmission, the IP address and the telephone number of the calling terminal are registered in step 3032. The IP address registration and the telephone number registration of the calling party terminal are performed by the called party in knowing the IP address and phone number of the calling party terminal in performing the Internet phone service. In step 3033, it is checked whether the called party IP corresponding to the called party terminal phone number is registered, and at the same time, information indicating that a call origination request has been received is transmitted to the calling party terminal. In step 3034, it is determined whether the called terminal has registered the IP address according to the search. If the IP address is not registered, the ISDN voice call is sent to the called terminal with reference to the transmitted called phone number in step 3035. Perform. This is done earlier in the s2 procedure in FIG. 2a. The call is made through the D channel of the ISDN, which is performed through the use of the ISDN network, not the use of the Internet network. The ISDN voice call operation is performed simultaneously with a transmission operation of predetermined Internet phone driving identification information through the ISDN network. For example, according to the voice call origination of the server, the ISDN exchange transmits the calling party number of the server or the corresponding information to the called party, and the called party can recognize the transmitted calling party number as the Internet driving identification information. Will be. That is, the Internet driving identifier information transmitted according to the ISDN call attempt of the server through the ISDN exchange is recognized and processed by the called terminal as information according to the Internet phone driving command. The transmission form of the Internet driving identification information is transmitted as a calling party number, a UUI message, and a calling party sub address. As the above-mentioned Internet phone driving identification information, the Internet phone driving command is transmitted to the called party through the ISDN network, and the called terminal also performs the Internet phone driving through the reception of such caller number, UUI or caller minor number. will be. Thereafter, in step 3037, it is determined whether the IP of the called party and the Internet phone driving information are received according to the driving of the Internet phone of the called terminal, which is received in response to the transmission of the Internet driving identification information. That is, in response to the ISDN voice call, it is determined whether the called terminal has transmitted the Internet access and the corresponding IP address and access information. In this case, in step 3038, the IP address and telephone number of the transmitted and registered calling terminal are transmitted to the called terminal. In step 3039, in response to the transmission in step 3038, it is detected whether there is transmission of response information according to an outgoing signal from the called party. In that case, in step 3040, the IP address of the called party and the response state information of the transmitted outgoing signal are detected. Send to the calling terminal. The Internet phone server terminates its call connection arbitration role and performs connection state check processing for the connected and formed call in step 3041 as necessary. As a result, the call arbitration operation of the Internet phone server is terminated.

In the case of the called terminal, in step 3050, it is determined whether there is an ISDN voice call in step 3051. If there is a call reception, in step 3052, it is determined whether or not a caller number has been received in response to the incoming voice call, and in such a case, caller number decoding processing in step 3053 is performed. Next, in step 3054, it is checked whether the received caller number matches the Internet phone driving identification information according to the Internet phone driving request. If not, the call is made to a general ISDN call and the ISDN call processing operation is performed accordingly. If it matches the pre-registered Internet phone driving identification information, the ISDN call is released in step 3055, and the Internet connection and the Internet phone are sequentially driven through steps 3056 and 3057. In step 3058, the user transmits his / her IP, telephone number, and Internet phone driving information to the Internet phone server that has transmitted the ISDN voice call through the Internet. Then, it is determined whether the calling party IP address and the telephone number are received in step 3059 or not, and if the call is received, a call bell is generated in step 3060. At this time, the ring is generated by the telephone connected to the called terminal. In other words, a call has come. In step 3061, the response information according to the response of the call is transmitted to the Internet phone server. In step 3062, it is checked whether there is a hook-off from the user, that is, whether or not a call is received. If the hookoff is checked, in step 3063, a connection signal (Connect) is transmitted to the calling terminal. In response to the transmission, in step 3064, it is detected whether a connection acknowledgment signal (Connect Ack) transmitted from the originating terminal is received. If detected, in step 3065, a call path is formed with the originating terminal. A voice signal is transmitted and received through the formed communication path. This state is also the voice call state with the calling terminal. The call path also becomes a call path through the Internet network. In step 3067, whether the call is terminated is detected, and in such a case, the call is released in step 3068. In step 3069, the Internet phone server is notified of the release of the Internet connection, and in step 3070, the Internet connection is released. Through this, the registration of the called terminal can be released.

FIG. 2B is a flowchart illustrating an operation of an Internet phone system using an Internet network according to another preferred embodiment of the present invention. FIGS. 4A, 4B, and 4C are caller-side ISDN terminals for performing the procedure shown in FIG. 20) and a control flow chart of the Internet phone server 40.

The overall operation thereof will be briefly described with reference to FIG. 2B. When the calling terminal user attempts to make a call, the calling terminal sends the called phone number, calling phone number, and calling IP address to the Internet phone server, and the Internet phone server requests the server to make a call to the calling terminal. The caller recognizes that the call is being attempted, and the calling terminal notifies the user of the call through the generation process of the call attempt sound (s1). However, if the corresponding IP address of the called party's phone number is not registered in the Internet phone server, a call attempt including the Internet phone driving identification information for the PPP connection is made to the called party's terminal by the called party's phone number received from the calling party. Inform that the phone request is from the calling party (s2), which is performed through the data call of the ISDN. At this time, the called terminal establishes the PPP connection through the incoming ISDN data call and transmits the Internet phone access information and the information related to the operation of the Internet phone to the Internet phone server (s3). In the figure, the data call is transmitted through ISDN, but this represents a physical connection state, and the actual logical connection is a call to the called terminal through the Internet network according to the PPP protocol. That is, the figure is a state shown to clarify whether or not to use the data call of ISDN, which is a feature of the present invention. After that, it follows the Internet phone procedure of two terminals connected to the Internet. In this procedure, the called party terminal confirms its call through the call reception process according to the PPP protocol operation, and informs the Internet phone server of the Internet phone driving information according to the Internet connection and the Internet phone driving state (s3). The phone server notifies the calling terminal of the fact that the called terminal answers the call and the IP address transmitted from the called party (s4). The calling party's IP address and telephone number are transmitted to the called party's terminal (s5). At this time, an incoming ring occurs at the called terminal and a ring back tone occurs at the calling terminal. When the called party responds by picking up the receiver, the called terminal transmits a connection signal (Connect) to the calling terminal according to the fact that it is connected to the calling terminal, and the calling terminal also receives a connection acknowledgment signal (Connect Ack). Call) according to the mutual transmission of the voice signals (s6).

The operation of the Internet phone service using the PPP protocol according to the ISDN data call will be described in more detail with reference to FIGS. 4A, 4B, and 4C. 4A is a flow of control operation of a calling terminal according to another preferred embodiment of the present invention, and FIG. 4B is a flow of control operation of an Internet phone server according to another preferred embodiment of the present invention. Control flow of the called terminal according to another embodiment of the present invention.

First, in the case of the calling terminal, it is determined whether there is a call origination request in step 3111 in the waiting state of step 3110. In such a case, in step 3112, the calling party terminal accesses the Internet. In step 3113, the calling party terminal transmits Internet phone access information including the called party's telephone number and its IP address and phone number to the Internet phone server through the Internet. The called party number and calling party number are information according to a call attempt request, and the calling party IP address and calling party number are information obtained by registering the calling party with the Internet phone server. In step 3114, it is checked whether the Internet phone server is a call in response to the transmitted information. If the call is made according to the call acknowledgment, the call processing tone is generated by the telephone in step 3115, and in step 3116, reception of the answering state information of the called party is transmitted to the destination IP and the transmission of the outgoing call. Detect. If it is determined in step 3114 whether or not the call is made by the server, and in step 3016, it is determined that the IP and response status information of the called party is not received, general ISDN call processing is performed. In this case, an attempt is made to make a call through an ISDN network corresponding to the transmitted called party number.

In step 3116, when the caller response state information of the called party according to the called party IP and the calling signal is received, the ringback tone is generated and processed in step 3117, and the call is transmitted and received from the called party in step 3118. It is determined whether there is a signal or call connection signal (Connect). Otherwise, ringback tone continues until the call connection signal is answered. When the call connection signal is received in step 3118, the call connection confirmation signal (Connect Ack) according to the confirmation of the call connection signal is transmitted to the called party terminal in step 3119. Thereafter, in step 3120, a call path is formed with the called terminal, and in step 3021, a voice signal is transmitted and received through the formed call path. This state is a voice call state, and the call path becomes a call path through the Internet network. In step 3122, whether the call is terminated is detected, and in such a case, the call is released in step 3123. In step 3124, the release of the Internet connection is notified to the Internet phone server. This is an operation of requesting the deletion of its own IP address and phone number registered as a call is performed in the Internet phone server, through which the registration of the calling terminal can be released. In step 3125, the Internet is released.

In the case of the Internet phone server, in step 3130, it is determined whether there is a call origination request from the calling terminal in step 3131. Internet phone access information includes the calling party's telephone number and the calling party's IP and telephone number from the calling terminal at the same time. In step 3132, the IP address and the phone number of the calling terminal are registered. The IP address registration and the telephone number registration of the calling party terminal are performed by the called party in knowing the IP address and phone number of the calling party terminal in performing the Internet phone service. In step 3133, it is detected whether the called party IP corresponding to the called party terminal phone number has been registered, and at the same time, call origination identification information indicating that a call origination request has been received is transmitted to the calling party terminal. In step 3134, it is determined whether the called terminal has registered the IP address according to the search. If the IP address is not registered, in step 3135, the ISDN D channel is used as the called terminal by referring to the called telephone number. Data call attempt for PPP connection is performed. This is an operation performed in the S2 procedure of FIG. 2B. Although the above operation may be performed by using an ISDN network, this is in accordance with the physical channel formation point of view, and is actually an internet connection according to the operation of the PPP protocol. In operation 3135, Internet phone driving identification information is simultaneously transmitted through the ISDN network. This is done according to the ISDN data call attempt. This type of transmission is also sent as a calling party number and UUI message, and a calling party sub address. The called terminal recognizes the received Internet phone driving identification information as information according to the Internet phone driving command. The recognition processing procedure is determined as described above whether or not the previously registered Internet phone driving identification information and the transmitted information match. Then, in step 3136, it is determined whether the PPP connection to the called terminal is successful. If it is determined that the access is successful, in step 3137, it is checked whether the IP address and the phone number of the called terminal are registered in the server, and in that case, the called IP address and the phone number of the called terminal that has been transmitted and registered in step 3138 are called. Send to the side terminal. In step 3139, in response to the transmission in step 3138, whether there is transmission of response information according to the outgoing signal from the called party is detected. In such a case, in step 3140, the IP address of the called party and the response state information of the transmitted outgoing signal are detected. Send to the calling terminal. The Internet phone server terminates its call connection arbitration role and performs connection state check processing for the connected and formed call in step 3141 as necessary. As a result, the call arbitration operation of the Internet phone server is terminated.

In the case of the called terminal, in step 3150, it is determined whether there is an ISDN data call in step 3151. If there is an ISDN data call call, it is determined whether or not a caller number has been received in response to the received data call in step 3152, and if so, the caller number decoding process of step 3153 is performed. Next, in step 3154, it is checked whether the received caller number matches the Internet phone driving identification information according to the Internet phone driving request. If not, since a general ISDN data call is received, the ISDN data call processing operation is performed accordingly. If it matches the Internet phone driving identification information registered in advance in step 3154, the Internet phone is driven in step 3155, and the ISDN call connection is sequentially performed in step 3156, and the Internet connection is performed in step 3157. In step 3158, its IP, telephone number, and Internet phone driving information are transmitted to the Internet phone server that has transmitted the ISDN data call through the Internet. Thereafter, in step 3159, it is determined whether the calling party confirms whether the calling IP address and the telephone number are received, and if it is confirmed, the call is generated in step 3160. At this time, the ring is generated by the telephone connected to the called terminal. The call was received. In step 3161, the response information according to the response of the call is transmitted to the Internet phone server. In step 3162, it is checked whether there is a hook-off from the user, that is, whether or not the call is received. If the hookoff is checked, in step 3163, a connection signal (Connect) is transmitted to the calling terminal. In response to the transmission, in step 3164, a connection confirmation signal (Connect Ack) transmitted from the calling terminal is received. If detected, in step 3165, a call path is formed with the calling terminal, and in step 3166 A voice signal is transmitted and received through the formed communication path. This state is also the voice call state with the calling terminal. The call path also becomes a call path through the Internet network. In step 3167, whether the call is terminated is detected, and in such a case, the call is released in step 3168. In step 3169, the Internet connection server is notified to the Internet phone server, and in step 3170, the Internet connection is released. Through this, the registration of the called terminal can be released.

5 is a block diagram illustrating an internal configuration of an ISDN terminal that performs an Internet phone service according to an exemplary embodiment of the present invention.

Referring to this, the RAM 24 functions as an operation memory of the terminal, and becomes a data processing memory which is transmitted and received in the practice of the present invention. This is commonly referred to as volatile memory.

The ROM 25 stores an operation program of the Internet phone service according to the embodiment of the present invention, and stores various data used in the program. It is implemented as a nonvolatile memory and also stores system information and the like.

The POTS interface 21 performs the functions of the codec and the subscriber processor (SLIC) for the POTS interface and control thereof. This interfaces the connection of a regular telephone.

The central processing unit 22 controls the overall operation of the terminal, and overall controls the operation of performing the Internet phone service according to the embodiment of the present invention. It is usually implemented as a one-chip microprocessor, which itself quickly handles operations such as computation and accumulation.

The ISDN interface 23 forms a connection of the ISDN network and is connected to the ISDN switch as a 2B + D channel structure. Its operation satisfies I.430 protocol and performs its operation. In the practice of the present invention, the transmission of the ISDN voice call, the transmission of the ISDN data call, and the transmission to the ISDN network such as the calling party number are interfaced at a lower layer.

The ISDN application / protocol processor 260 processes an ISDN voice call origination, an ISDN data call origination, and a transmission to an ISDN network such as an originator number at an upper layer with the ISDN network according to the present invention. Its operating state is determined by protocols Q.921 and Q.931.

The Internet phone application / protocol processing unit 27 is designed to satisfy the H.323 protocol, and performs processing for driving and operating the Internet phone.

The PPP and TCP / IP protocol processing unit 28 performs processing in accordance with the Internet connection. It functions as a lower layer of the Internet application. In this way, the Internet access and data transmission process according to the embodiment of the present invention is performed.

The Internet phone access information storage unit 29 receives the IP address of the calling party and the called party and stores the received IP address. It is implemented as flash memory and RAM. The Internet phone service is performed through the stored IP address and the telephone number. And if necessary, the storage of Internet phone information is also achieved.

6 is an internal block diagram of an Internet phone server for performing an Internet phone service according to a preferred embodiment of the present invention.

Referring to this, the RAM 44 functions as an operating memory of the server, and becomes a temporary processing memory of data transmitted and received in the practice of the present invention. This is commonly referred to as volatile memory.

The ROM 45 stores an operation program of the Internet phone service according to the embodiment of the present invention, and stores various data used in the program. It is implemented as a nonvolatile memory and also stores system operation information and the like. The Internet interface 43 interfaces with a connection with the Internet, and the PPP satisfies the PPP protocol in the TCP / IP connection, thereby performing internet transmission and reception processing of data.

The gatekeeper processing unit 49 operates according to the H.323 protocol, which simultaneously performs call origination attempts, user authentication and authorization, call routing, charging, and conversion between terminal addresses and IP addresses. .

The ISDN processing interface 42 performs operations such as accessing and transmitting / receiving data to, and transmitting and receiving voice and data calls to an ISDN communication network according to I.430 and Q.921 and Q.931 protocols. This is applied for interworking of the Internet phone server and the ISDN network.

The IP address and ISDN telephone number DB 46 stores the IP address and ISDN telephone number of the called party. They can be registered upon call request or upon internet connection. In addition, in the practice of the present invention, Internet phone driving request command identification information transmitted to the called party's terminal is also stored in the DB 46.

Therefore, as an embodiment of the present invention as described above, an implementation of a terminal making a connection between an internet network and a public switched network (PSTN, ISDN), and a called party to a call attempt request of an originating party through such an internet phone service using such a terminal This real-time call response can be performed, and the effect of enhancing the user's convenience is achieved by allowing the telephone call through the internet network to be carried out in real time according to the call response.

Claims (58)

In the Internet phone service system using an ISDN terminal, In response to the call origination request, the user transmits the Internet phone connection information and the corresponding Internet phone connection information. When the Internet phone connection information and the connection signal are received in response to the transmission, the received Internet phone connection information is received. A calling party terminal forming a voice call path with the called party terminal for reference; According to the call origination request of the calling terminal and the transmission of the Internet phone access information, it is searched whether the corresponding called terminal is connected to the Internet, and according to the result, it requests the driving of the called terminal through the public switching network. An Internet phone server for transmitting the Internet phone access information of the called party terminal to the calling party terminal according to the Internet phone driving result of the called party terminal; As a result of the detection of the call to the public switched network according to the request for driving the Internet phone, the operation of transmitting the Internet phone and the connection information of the Internet phone is transmitted, and the connection confirmation signal from the originating terminal and the connection information of the Internet phone transmitted in response to the transmission are made. The Internet phone system comprising a called terminal forming a voice call path with the calling terminal with reference to the received Internet phone access information. The method of claim 1, wherein the calling terminal, In response to the transmitted Internet phone access information, it is determined whether the call is made by the Internet phone server, and when a call is made, a predetermined type of call attempt sound is generated and controlled by the connected telephone. . The method of claim 1, wherein the Internet phone server, An Internet phone system comprising requesting an Internet phone of the called terminal through transmission of ISDN voice call and transmission of pre-stored Internet phone driving identification information according to a search result of the Internet connection of the called terminal; The method of claim 3, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted in the form of caller ID in accordance with ISDN voice call origination, The method of claim 3, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted as the form of the calling party sub-number according to the ISDN voice call origination, The method of claim 3, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted as a UUI form according to the ISDN voice call origination, The method of claim 1, wherein the Internet phone server, An Internet phone system, characterized in that it requires an Internet phone to be driven by a called terminal by sending ISDN data calls according to the PPP protocol and transmitting previously stored Internet phone driving identification information according to a PPP protocol; The method of claim 7, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted in the form of caller ID in accordance with the ISDN data call origination, The method of claim 7, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted as the form of the caller minor number according to the ISDN data call origination, The method of claim 7, wherein the Internet phone driving identification information, Internet phone system, characterized in that transmitted as a UUI form according to the ISDN data call origination, In the service method of the Internet phone system having an originating and destination terminal for making an Internet connection by driving the Internet phone, and having an Internet phone server for mediating the connection between the two terminals, In the calling terminal, a first process of transmitting an Internet phone and corresponding Internet phone connection information according to a call origination request of a user; In the Internet phone server, according to the call origination request of the calling terminal and the transmission of the Internet phone access information, it is detected whether the corresponding called terminal is connected to the Internet, and according to the result, the called terminal through the public switching network. A second process requiring the internet phone to be driven, In the called terminal, a third process of transmitting the Internet phone driving and the Internet phone connection information as a result of the detection of the call to the public switched network according to the Internet phone driving request; In the calling terminal and the called terminal, if the Internet phone access information and connection signal from each terminal are mutually mediated through the Internet phone server, the received Internet phone access information is referred to with reference to the received Internet phone access information. And a fourth process of forming a voice call path between the terminals. The method of claim 11, wherein the second process, And requesting to drive the Internet terminal of the called terminal by sending an ISDN voice call and transmitting pre-stored Internet phone driving identification information. The method of claim 12, wherein the Internet phone driving identification information, Characterized in that it is transmitted in the form of calling party number according to ISDN voice call origination. The method of claim 12, wherein the Internet phone driving identification information, Characterized in that it is transmitted in the form of a calling party subnumber according to ISDN voice call origination. The method of claim 12, wherein the Internet phone driving identification information, Method is characterized in that the transmission is in the form of UUI according to the ISDN voice call origination. The method of claim 11, wherein the second process, And requesting to drive the Internet terminal of the called terminal through transmission of ISDN data call according to the PPP call attempt and transmission of previously stored Internet phone driving identification information. The method of claim 16, wherein the Internet phone driving identification information, Characterized in that it is transmitted in the form of calling party number according to ISDN data call origination. The method of claim 16, wherein the Internet phone driving identification information, Characterized in that it is transmitted in the form of a calling party subnumber according to the ISDN data call origination. The method of claim 16, wherein the Internet phone driving identification information, Method is characterized in that the transmission is in the form of UUI according to the ISDN data call origination. The method of claim 11, wherein the third process, Comparing the Internet phone driving identification information received according to the public exchange network call with the Internet phone driving identification information stored in advance; If it is determined that the same identification information, characterized in that the Internet connection driven by the operation of the Internet phone, and the process of transmitting the Internet phone access information. In a terminal device that performs an Internet phone service, An Internet phone driving unit which drives the Internet phone in response to a call origination request from a user and a call reception of predetermined Internet phone driving identification information; An internet phone connection information transmission unit for transmitting a call counterpart and his or her internet connection information according to the driving of the internet phone; And a call path forming unit for forming a voice call path with reference to the received Internet phone connection information. The method of claim 21, In accordance with the reception state of the Internet phone access information transmitted from the other party, the Internet phone / public switched network selection unit for selecting and processing the voice call via the Internet phone and the voice call via the public switching network is further provided. Terminal device. The method of claim 21, wherein the Internet phone driving unit, And a built-in Internet phone driving control when the ISDN voice call is received and the Internet phone driving identification information received accordingly is read as predetermined Internet phone driving identification information. The method of claim 23, wherein the Internet phone driving identification information, Terminal device characterized in that the calling party number according to the ISDN voice call origination. The method of claim 23, wherein the Internet phone driving identification information, Terminal device characterized in that the calling party minor number according to the ISDN voice call origination. The method of claim 23, wherein the Internet phone driving identification information, Terminal device characterized in that the UUI message according to the ISDN voice call origination. The method of claim 21, wherein the Internet phone driving unit, The terminal apparatus characterized by controlling the built-in Internet phone driving when the incoming of the ISDN data call according to the PPP call attempt and the Internet phone driving identification information received accordingly is read out by the predetermined Internet phone driving identification information. The method of claim 27, wherein the Internet phone driving identification information, Terminal device characterized in that the calling party number according to the ISDN data call origination. The method of claim 27, wherein the Internet phone driving identification information, Terminal device characterized in that the calling party minor number according to the ISDN data call origination. The method of claim 27, wherein the Internet phone driving identification information, Terminal device characterized in that the UUI message according to the ISDN data call origination. A method of performing Internet phone service in an internet and public switched network interconnection terminal, An Internet phone driving process of driving an Internet phone according to a call origination request from a user and a call reception of predetermined Internet phone driving identification information; An internet phone access information transmission process of transmitting a call counterpart and his or her internet access information according to the operation of the internet phone And a voice call path forming step of forming a voice call path with reference to the received Internet phone access information of the called party. The method of claim 31, wherein Internet phone / public switched network selection process for selecting and processing voice call via Internet phone and voice call through public switched network according to the reception state of Internet phone connection information transmitted from the call partner. How to feature. The method of claim 31, wherein the Internet phone driving process, And if the ISDN voice call is received and the Internet phone driving identification information received accordingly is read as predetermined Internet phone driving identification information, controlling the embedded Internet phone driving. The method of claim 33, wherein the received Internet phone driving identification information, Caller ID according to ISDN voice call origination. The method of claim 33, wherein the received Internet phone driving identification information, Caller minor number according to ISDN voice call origination. The method of claim 33, wherein the received Internet phone driving identification information, Method characterized in that the UUI message according to the ISDN voice call origination. The method of claim 31, wherein the Internet phone driving process, And receiving the ISDN data call according to the PPP protocol, and if the received Internet phone driving identification information is read out by the predetermined Internet phone driving identification information, further comprising controlling the embedded Internet phone driving. Way. The method of claim 37, wherein the received Internet phone driving identification information, Caller ID according to ISDN data call origination. The method of claim 37, wherein the received Internet phone driving identification information, Caller minor number according to ISDN data call origination. The method of claim 37, wherein the received Internet phone driving identification information, Method characterized in that the UUI message according to the ISDN data call origination. An internet phone server device for performing an internet phone service, An Internet phone connection information receiver for receiving a call origination request and Internet phone connection information according to the operation of the Internet phone from a predetermined calling party terminal; An internet access information search unit for searching whether or not to register internet access information of a called terminal included in the internet phone access information; An internet phone driving control unit for transmitting predetermined Internet phone driving identification information for making a call through a public switched network and a request for driving an internet phone of a called terminal according to the Internet access information search result; In response to the transmission of the Internet access information of the calling terminal and the Internet phone driving identification information, the Internet phone call path forming unit which mediates the formation of a voice call between the two terminals as the Internet access information of the called terminal driven by the Internet phone. Server device, characterized in that made. The method of claim 41, wherein the Internet phone drive control unit, And, according to the Internet access information retrieval result, transmits a call through an ISDN voice call and Internet phone driving identification information predetermined for driving an Internet phone of a called terminal. 43. The method of claim 42, wherein the transmitted Internet phone driving identification information, Server device characterized in that the calling party number according to the ISDN voice call origination. 43. The method of claim 42, wherein the transmitted Internet phone driving identification information, Server device characterized in that the calling party minor number according to the ISDN voice call origination. 43. The method of claim 42, wherein the Internet phone driving identification information, Server device characterized in that the UUI message according to the ISDN voice call origination. The method of claim 41, wherein the Internet phone drive control unit, A server device characterized in that for transmitting the ISDN data call according to the PPP protocol and the Internet phone driving identification information specified in advance for driving the Internet phone of the called terminal. The method of claim 46, wherein the transmitted Internet phone driving identification information, Server device characterized in that the calling party number according to the ISDN data call origination. The method of claim 46, wherein the transmitted Internet phone driving identification information, Server device characterized in that the calling party minor number according to the ISDN data call origination. The method of claim 46, wherein the Internet phone driving identification information, Server device characterized in that the UUI message according to the ISDN data call origination. In the method of performing the service of the Internet phone server, An internet phone access information receiving process for receiving a call call request and internet phone access information according to the operation of an internet phone from a predetermined calling party terminal; An Internet phone connection information retrieval process for retrieving whether or not the Internet terminal connection information of the called terminal included in the Internet phone connection information is registered; An Internet phone driving control process for transmitting predetermined Internet phone driving identification information for making a call through a public switched network and a request for driving an Internet phone of a called terminal according to the Internet phone access information search result; An Internet phone call path which mediates the formation of a voice call between the two terminals as the Internet phone connection information of the called terminal which is driven by the Internet phone in response to the transmission of the Internet phone access information and the Internet phone driving identification information of the called terminal. Characterized in that it consists of a forming process. 51. The method of claim 50, wherein the Internet phone driving control process, And transmitting, based on a result of the Internet phone access information search, a call through an ISDN voice call and transmission of predetermined Internet phone driving identification information for driving the Internet phone of the called terminal. The method of claim 51, wherein the transmitted Internet phone driving identification information, Caller ID according to ISDN voice call origination. The method of claim 51, wherein the transmitted Internet phone driving identification information, Caller minor number according to ISDN voice call origination. The method of claim 51, wherein the Internet phone driving identification information, Method characterized in that the UUI message according to the ISDN voice call origination. 51. The method of claim 50, wherein the Internet phone driving control process, The method further comprises the step of transmitting an ISDN data call according to the PPP protocol and transmitting predetermined Internet phone driving identification information for driving the Internet phone of the called terminal. The method of claim 55, wherein the transmitted Internet phone driving identification information, Caller ID according to ISDN data call origination. The method of claim 55, wherein the transmitted Internet phone driving identification information, Caller minor number according to ISDN data call origination. The method of claim 55, wherein the Internet phone driving identification information, Method characterized in that the UUI message according to the ISDN data call origination.