KR100406488B1 - Voip use of additional service realizing for internet phone system - Google Patents

Abstract

Disclosed is an internet phone system in which an additional service is implemented. An Internet phone system in which an additional service according to the present invention is implemented includes a gatekeeper host including a local user information database and a gatekeeper, and providing an additional service associated with or communicated with a receiver terminal; A central user information database for exchanging predetermined information with the gatekeeper host; A web server for allowing a user or operator to modify user information stored in a local user information database or a central user information database using a web browser; An MTS for converting the text mail received from the user terminal into a voice message for transmission to the receiver; It includes a VMS to service the mail containing the voice of the user. A method of operating a gatekeeper system in which an additional service according to the present invention is implemented includes: (a) receiving a call request message from a user terminal; (b) the gatekeeper calling a receiver terminal according to the call request message; (c) if a release complete message is received from the called terminal, confirming whether a corresponding reason exists in an address translation table; (d) if the reason exists in the address translation table, resetting the call corresponding to the reason.

Description

VOIP USE OF ADDITIONAL SERVICE REALIZING FOR INTERNET PHONE SYSTEM}

The present invention relates to an Internet phone system in which an additional service is implemented and a method of operating the same. More particularly, the present invention relates to an H.323 gatekeeper supporting a direct call mode and a VMS (Mail Message System) or MTS (Mail To). The present invention relates to an Internet phone system and a method of operating the same.

In recent years, information and communication technologies centered on networks have been rapidly developed. The information communication technology is moving away from the technology of transmitting only data and transmitting video and voice together. Such a technology for enabling voice communication in a data network is called VoIP (Voice over Internet Protocol).

An example of the VoIP is an Internet phone. The Internet phone system is a system for connecting a sender and a receiver through a network instead of a public telephone network, and has been developed to reduce call rates of international calls because the call rates of international telephones transmitted and received through existing public telephone networks are too expensive.

However, since the function of the Internet phone developed for the above reason is not only a function of transmitting and receiving, but also an unconditional incoming call function by presetting, the Internet phone does not have a great differentiation from a transmission / reception service using an existing public telephone network.

Most of these existing Internet phone systems operate based on the H.323 standard protocol set by the International Telecommunication Union.

Meanwhile, in the case of an Internet phone system using a gatekeeper supporting H.323 in a voice communication system such as a conventional voice message system, the terminal and the terminal are directly connected one-to-one in a direct call mode.

1 is a view showing that the terminal and the terminal is connected through a gatekeeper of the conventional H.323.

As shown in FIG. 1, the H.323-based gatekeeper, which is currently commercialized, is a direct call mode and directly connects a terminal to a terminal one-to-one.

In this structure, the gatekeeper 100 only serves to change the phone number system to an IP address when the user terminal 110 requests access to the receiver terminal 120. In this case, the additional service may be provided when the call setup is changed according to the characteristics of the service.

However, since the gatekeeper 100 cannot intervene in the call of any terminal after the address translation work, the gatekeeper 100 performs only the unconditional incoming call function of the static nature of presetting only the contents of the address translation table.

Therefore, the conventional Internet phone system as described above has only a role of performing only a connection between the user terminal 110 and the receiver terminal 120, so there are some problems without having a large difference from the conventional telephone.

First, when the receiver terminal is a computer, when the computer is turned off, the program is not running, or the program terminates abnormally, the receiver computer cannot take any response to the incoming call.

Second, even if the sender is connected to the receiver terminal, if the receiver is absent, the sender cannot notify the receiver that he or she has made a call because the voice mailbox or other supplementary services cannot be executed. have.

2 is a diagram illustrating an Internet phone system supporting a conventional supplementary service such as VMS or MTS.

As illustrated in FIG. 2, an Internet phone system in which an additional service such as VMS 220 or MTS 230 is implemented uses a gatekeeper provided with a built-in user database 201.

However, in the above case, since the database is not shared, there is a problem that the contents of the database cannot be viewed unless the product is related to the manufacturer.

3 is a diagram illustrating an Internet phone system sharing a central user database based on a conventional Light-weight Directory Access Protocol (LDAP).

As shown in FIG. 3, since the LDAP protocol uses a TCP transmission scheme, the gatekeeper 310 is provided with a handshaking scheme with the LDAP server in order to receive information of the sender terminal. In this case, when a plurality of terminals are connected to the LDAP server, if a delay occurs due to TCP characteristics during network transmission, the response may be slowed as a whole. In such a case, the speed of media processing for a message such as an e-mail is more important for an additional service such as a VMS or an MTS.

On the other hand, it is more important how the gatekeeper connects a call between two terminals for a certain time. However, when the gatekeeper 310 needs to withdraw user information from the central user database 300 of LDAP, the performance of the gatekeeper 310 is inevitably deteriorated.

Each time a call is connected between terminals, the gatekeeper 310 must read the user information from the central user database 300, so that the speed of the gatekeeper 310 is reduced.

This problem can be solved by using the embedded database, but it can be a problem in linking with other supplementary services.

In order to effectively solve the above problems of the prior art, an Internet phone having a gatekeeper host equipped with a local user information database and a gatekeeper and an additional service for providing a VMS and an MTS based on the central user information database is implemented. The object is to provide a system and a method of operation thereof.

1 is a view showing that the terminal and the terminal is connected through a gatekeeper of the conventional H.323.

2 is a diagram illustrating an Internet phone system supporting a conventional supplementary service such as VMS or MTS.

3 is a diagram illustrating an Internet phone system sharing a conventional LDAP-based user database.

4 is a diagram illustrating an Internet phone system in which a gatekeeper and an additional service are integrated and constructed according to an embodiment of the present invention.

5 is a diagram illustrating a dynamic address translation information message according to an embodiment of the present invention.

6A through 6C are flowcharts illustrating a method of providing an additional service through an address translation table according to an embodiment of the present invention.

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

400: gatekeeper host 410: web server

420: central user information database 430: VMS

440: MTS

One aspect of the present invention for achieving the above technical problem includes a local user information database and a gatekeeper, receiving a call setup request message from a registered user terminal, the call setup permission is included in the user terminal address conversion information A gatekeeper host that transmits a message and provides an additional service associated with or communicated with a receiver terminal;

A central user information database for exchanging predetermined information with the gatekeeper host;

A web server for allowing a user or operator to modify user information stored in a local user information database or a central user information database using a web browser;

An MTS for converting the text mail received from the user terminal into a voice message for transmission to the receiver;

It includes a VMS to service the mail containing the voice of the user.

Another aspect for achieving the technical problem of the present invention comprises the steps of (a) receiving a call request message from the user terminal;

(b) the gatekeeper calling a receiver terminal according to the call request message;

(c) if a release complete message is received from the called terminal, confirming whether a corresponding reason exists in an address translation table;

(d) if the reason exists in the address translation table, resetting the call corresponding to the reason.

Hereinafter, an internet phone system provided with an additional service according to the present invention and an operation method thereof will be described in detail with reference to FIGS. 4 to 6.

4 is a diagram illustrating an integrated system of a gatekeeper and an additional voice communication service according to an embodiment of the present invention.

As shown in FIG. 4, the Internet phone system provided with an additional service includes a gatekeeper host 400, a web server 410, a central user information database 420, a voice mail service (VMS) 430, and an MTS ( Mail To Speech) 440.

The gatekeeper host 400 includes a gatekeeper 400a and a local user information database 400b. The gatekeeper 400a is based on a direct call modem using an H.323 protocol. If a request for registration or address translation is performed, the corresponding operation is performed. In this case, the gatekeeper 400a uses the user information through the local user information database 400b provided therein.

In addition, the gatekeeper 400a includes information about the VMS 430 and the MTS 440, and when the interworking relationship with each additional service is established, the user terminal according to a call reset message requested from the user terminal. To use the additional service.

The local user information database 400b is a user information database that is used exclusively by the gatekeeper 400a. Since the local user information database 400b is required to include a phone number having a common character, it is maintained around the phone number. In this case, information stored in the local user information database 400b may not be stored in the central user database 420. Therefore, the user information stored in the local user information database 400b is updated by the gatekeeper 440a.

As described above, when the gatekeeper host 400 having the local user information database 400b receives the call setup request message from the user terminal, it recognizes the call setup authority with minimum delay and accepts the address translation request. This is improved. In other words, since the gatekeeper host 400 uses a dedicated local user information database 400b, the gatekeeper host 400 may provide a faster service than using a central user information database having a common characteristic.

The web server 410 connects a user terminal connected through a web browser to the gatekeeper host 400 and to a central user information database 420 at the request of the user or operator. In this case, the user or the operator may modify user information stored in the central user information database 420 through the web server 410. In this case, the user can modify only the information related to the user.

When the user or the operator modifies the central user information database 420, the web server 410 may simultaneously modify the local user information database 400b and the fields requiring uniformity.

The central user information database 420 stores user information based on the LDAP protocol and takes a TCP transmission scheme. In addition, the central user information database 420 minimizes a problem that occurs when user information is updated by minimizing a field requiring uniformity with the local user information database 400b.

The voice mail service (VMS) 430 is a service system capable of transmitting and receiving voice mail and the like, interlocked with a mail server, and grasps user information using the central user information database 420.

The mail to speech (MTS) 440 is a service system for converting a voice to a plain text mail to a user and is linked with a mail server. The MTS 440 also incorporates a text-to-speech (TTS) engine and uses a central user information database 420.

The additional services such as the VMS 430 and the MTS 440 are used only when confirming the registration of the receiver terminal or confirming the receiver receiving the voice message when receiving the service request message from the user terminal. This does not apply as a criterion for evaluating services.

The evaluation criteria of the additional services such as the VMS 430 and the MTS 440 how to quickly transmit a message provided from the user terminal to the receiver terminal, how quickly to extract the message received from the user terminal and listen to the voice Or how clean and smooth text messages are converted to voice and presented to the user.

Therefore, in view of the above characteristics of the service, if the additional service system such as the VMS (430) and MTS (440) uses a local user information database dedicated to voice services, the non-uniformity of the user information and maintenance of the database Inefficiencies, such as unnecessary resources required, occur. Therefore, it is much more efficient for the supplementary services such as the VMS 430 and the MTS 440 to improve the voice transmission / reception function while using the central user information database 420.

As described above, the gatekeeper's dynamic call setup using the Internet phone system integrated with the supplementary service system and the address translation message will be described.

First, an Internet phone system based on the H.323 protocol uses a series of H.323-specific call signaling procedures: setup, call prceeding, alerting, connect, and release complete. These are described in more detail in the Q.931, H.323 and H.225 standards of the International Telecommunication Union. In addition, a series of registration, entry and status signals (RAS) are used as described in the International Telecommunication Standard H.323.

5 is a diagram illustrating an address translation message required for dynamic call setup according to an embodiment of the present invention.

As shown in FIG. 5, when the gatekeeper host 400 establishes a call, in the structure of the message entering the data field, A is set to 01H for the address translation, and B is the number of address translation records. Enters, up to 255. C contains s (r), which is the size of the address translation record in B.

Then, in the structure of the address translation record, D defines whether to use the address translation record when receiving a predetermined event. At this time, the upper 3 bits are divided according to the server of the associated supplementary service, and the lower 5 bits are defined as the rise code of the release complete message of H.323.

In E, when a new call is established by address translation, it is used for call establishment purposes and follows the code defined in the conference goal of Q.931 specified by the International Telecommunication Union.

And F contains new call setup destination information.

On the other hand, the recent H.323 may check whether the user terminal can be registered by periodically sending a registration request message for KeepAlive. At this time, when the gatekeeper host 400 transmits a registration permission request message in response to the registration request message for KeepAlive, an operator may arbitrarily change the location of the server or dynamically reset the reason for address translation. .

6A illustrates a call resetting method of a user terminal based on a reason according to release complete received from a receiver terminal according to an embodiment of the present invention.

As shown in Figure 6a, the user terminal transmits a call request message to the gatekeeper host 400 (s600). Here, the call request message is collectively referred to until the gatekeeper host 400 receives a registration request message (RRQ) from the user terminal and transmits a registration permission message to the user terminal. In this case, the gatekeeper host 400 configures and transmits a nonstandarddata field in the format of the registration permission message as shown in FIG. 5.

Then, the receiver terminal corresponding to the call requested by the user terminal is called (s601).

In this case, if the receiver does not pick up the phone for a certain time despite receiving the call signal, the user terminal receives a release complete message including a reason corresponding thereto (S602). In this case, the user terminal performs a step of searching for a corresponding reason using the address translation table provided from the gatekeeper host 400 (s603). If the corresponding reason is found in the address translation table in the search step s603, the user terminal resets the call with reference to the address translation table (s604). For example, if the reset call is connected to the VMS 430 or the MTS 440 linked to the gatekeeper host 400, the call is reset to be connected to the VMS 430 or the MTS 440.

On the other hand, if the corresponding reason is not found in the address translation table in step s603, the call is disconnected (s605).

FIG. 6B is a diagram illustrating call resetting by the user terminal according to a specific event.

As shown in Figure 6b, when the power of the receiver terminal is off (off) state as follows. Until the step (s601) in which the gatekeeper 400b calls the receiver terminal is the same as the case of FIG. 6A. Then, when a call is received at the receiver terminal, an event message defined in the event code table is generated (s612).

Then, it is checked whether the corresponding event exists in the address translation table (S613). If an event exists in the verification step (S613), the call is reset with reference to the address translation table (S614).

On the other hand, if there is no event in the checking step (s613), the call is disconnected (s615).

6C is a diagram illustrating a method for resetting a call to be connected with a user terminal by a receiver terminal to a specific server according to one embodiment of the present invention.

As shown in FIG. 6C, a receiver terminal registered with the gatekeeper establishes an address translation table using the gatekeeper (S620).

When the receiver terminal, which has constructed the address conversion table as described above, receives the call request message from the user terminal (s621), it checks the type of server used by the user terminal (s622).

Thereafter, according to the server of the user terminal identified in the address translation table, a step of checking whether there is a server to which the call of the user terminal is reset is performed (S623).

In the checking step (s623), if there is a server to be reset in the address translation table, set the call of the user terminal to the reset servo address (s624), and the address to be reset to the facility message of Q.931 user terminal Send to (s625).

On the other hand, in the checking step (s623), if there is no server to be reset in the address translation table, the call of the user terminal is disconnected (s626).

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The Internet phone system providing the additional service according to the present invention as described above can bring the effect of increasing the added value by integrating and building the respective voice-related additional services that were previously operated separately with the Internet phone system.

Claims (6)

It includes a local user information database and a gatekeeper, and receives a call setup request message from a registered user terminal, and transmits a call setup permission message including the address translation information to the user terminal to communicate or associated with the receiver terminal A gatekeeper host providing a service; A central user information database for exchanging predetermined information with the gatekeeper host; A web server for allowing a user or operator to modify user information stored in a local user information database or a central user information database using a web browser; An MTS for converting the text mail received from the user terminal into a voice message for transmission to the receiver; And Internet phone system that implements an additional service, characterized in that it comprises a VMS to service the mail containing the user's voice. The method of claim 1, And the user terminal periodically transmits a keepalive registration request message to the gatekeeper, so that the user terminal can be registered at a predetermined time. The method of claim 1, The Internet phone system in which an additional service is implemented, wherein the gatekeeper includes address translation information in an authorization permission message corresponding to the authorization request message received from the user terminal. The method of claim 1, And the gatekeeper transmits the call setup permission message including address translation information corresponding to the call setup request message received from the user terminal. (a) receiving a call request message from a user terminal; (b) the gatekeeper calling a receiver terminal according to the call request message; (c) if a release complete message is received from the called terminal, confirming whether a corresponding reason exists in an address translation table; and (d) if the reason exists in the address translation table, resetting the call corresponding to the reason. The method of claim 5, wherein step (b) The gatekeeper receiving the call request message from the user terminal further comprises the step of providing the address translation information to the user terminal operating method of the Internet phone system is implemented.