KR100938558B1 - Method of offering call service according to custormer's priority call, Method of offering call service according to user authentication information in VoIP network and Recording medium thereof - Google Patents

Abstract

Disclosed are a call service providing method according to a subscriber's call priority in a VIP network, a call service providing method according to user authentication information in a VIP network, and a recording medium recording the same.

According to an aspect of the present invention, a method of providing a call service according to a call priority of a subscriber in a VIP network includes a plurality of VIP terminals and a gatekeeper. Set a call priority according to preset constraints for each subscriber of the plurality of VIP terminals within the zone managed by the keeper, and store the call priority of the set subscriber in each of the gatekeeper or the plurality of VIP terminals. The method of claim 1, wherein the subscriber of the first VIO IP terminal and the subscriber of the second VIO IP in the zone managed by the gatekeeper perform a call, and the third VIO IP in the zone to the gatekeeper during the call. The subscriber of the terminal is performing the call Requesting a call with a subscriber of a first VIP terminal, retrieving the call priority of the subscriber of the second VIP terminal requesting the call with the subscriber of the second VIP terminal from the gatekeeper; And providing a call service to a subscriber of the third VIP terminal according to the retrieved call priority.

According to the present invention, in a VoIP environment, even if a communication subscriber is in a call, the subscriber having a high communication priority attempts to make a call or an emergency situation such as a fire or theft occurs, and thus the other party is in a call. If you must make a call, or if you do not have time to wait for the end of the existing call in accordance with a preset condition, the call is forcibly terminated in the middle of the call even though the other party is busy. It is possible to ensure a prompt call, and after the emergency call is terminated has the effect of improving the reliability of the call by restoring the existing forcibly terminated call.

Description

Method of providing call service according to subscriber's call priority in VIP network, method of providing call service according to user authentication information in VIP network and recording medium {Method of offering call service according to custormer's priority call, Method of offering call service according to user authentication information in VoIP network and Recording medium

1 is a block diagram of a VIP network to which the H.323 protocol is applied.

2 is a diagram illustrating a network configuration according to a call between subscribers in a VIP system.

3 illustrates the call signaling of FIG. 2.

4 is a flowchart illustrating a call service providing method in a VIP network according to a call priority of a subscriber of the present invention.

5A shows a single byte information element representing a single information element.

5B illustrates a first multi-byte information element representing a multi-information element.

5C shows a second multi-byte information element representing a multi-information element.

6 shows a detailed structure of a first multi-byte information element applied to the present invention.

7 shows a detailed structure of a second multi-byte information element applied to the present invention.

8 illustrates a call flow between VIP terminals in a call.

9 is a diagram illustrating a call flow between VIP terminals according to a call priority of a subscriber of the present invention.

FIG. 10 illustrates call signaling of FIG. 9.

FIG. 11 illustrates a configuration of a VIO IP in which a management zone of the present invention includes different gatekeepers.

The present invention relates to a method of providing a call service in a VIP, particularly a method of providing a call service according to a call priority of a subscriber in a VIP network, and a method of providing a call service according to user authentication information in a VIP network. And a recording medium recording the same.

Voice over Internet Protocol (VoIP) refers to a technology for transmitting voice and fax data over an internet protocol network or a voice application service based on an internet network. A public switched telephone network (PSTN) ) And interworking through a gateway or an internet-only network. This is one-tenth of the bandwidth of VIP, and it has many advantages such as voice communication, low cost, and easy network management.However, service quality such as sound quality and connection stability is still higher than that of public switched telephone network. There is a downside to falling. Nevertheless, in the long run, all public switched telephone networks will be replaced by Internet protocol networks.

The VIO protocol currently in use includes ITU's H.323, IETF's Session Initiation Protocol (SIP), and CISCO's Media Gateway Control Protocol (MGCP). For transmission, Real-time Transport Control Protocol (RTCP) and Real-time Transport Protocol (RTP) are used.

This VIP is a communication service that converts voice data into Internet protocol data packets on a computer network to make a call on a general telephone network, which is a conventional protocol based on a line such as a public switched telephone network (PSTN). Rather, it is a technique for sending voice information in digital form within discrete packets. It uses packet data transmission method and transmits voice data in small units called packets by using a company-dedicated network or a national backbone network. Therefore, existing wired and wireless telephones use a fixed line exclusively using a telephone line exchange method. This can reduce the high cost per line and the large costs associated with long distance and international phone calls.

On the other hand, VIP has recently been booming in conjunction with the development of various Internet technologies due to the expansion of the Internet infrastructure as well as the advantage of improving the problems with the existing telephone system.

In particular, major Internet search sites are trying to expand their membership even more by adding specialized services that search sites have, for example, a call service function to provide various search and information services, and a messenger service.

However, in case of providing a call service using VIP, a public telephone network is generally used. In this case, a security problem may occur, and one of the methods to solve the problem is a virtual private network (VPN). The private sector private network is a service for establishing a virtual private network in the Internet Protocol (IP) network provided by a service provider.

A virtual private network is a virtual construction of a closed private circuitry network protected by authentication technology, encryption, etc. in a public network. However, the virtual private network has a problem in that processing time is required for encoding and decoding by encrypting data, and a packet overhead for encryption and authentication occurs.

Therefore, VIP is used to provide detailed, systematic and personalized information to customers on the Internet and to promote high quality customer service and VIP service using VIP, which has a relatively fast processing time. Efforts have been made to improve and utilize them.

Moreover, the communication environment of developed countries is shifting from public switched telephone network (PSTN) based on voice communication-oriented circuit switching to broadband convergence network (BcN) based on internet protocol. Under the supervision of the Ministry of Information and Communication, the company is planning to gradually switch the telecommunications operators' international and domestic telecommunications switches to broadband integrated network by 2010.

Operating on the Internet protocol, VIP has been introduced for the purpose of voice communication services over the Internet in 1995. Since then, H.323, Session Initiation Protocol (SIP), and media gateway control have not been unified to the world standard. Various protocols such as Media Gateway Control Protocol (MGCP) have been proposed and implemented.

In addition, the use of VIP is rapidly increasing due to various effects such as reduced call rates. Most PSTN networks are expected to be replaced by Internet protocol networks in the near future.

However, in the case of providing a communication service using a conventional VIP, if the other party is already in communication with another communication subscriber, the exchange actually blocks the other subscriber's call connection until both parties in the call are terminated. There is a problem in that even if more urgent communication demand occurs until the call is completed, the call cannot be made.

Therefore, the first technical problem to be achieved by the present invention is a V that can provide a fast and stable call connection when the subscriber with a high communication priority attempts to make a call or when making a call with the other party in an emergency. The present invention provides a call service providing method according to a subscriber's call priority in an OIP network.

In addition, a second technical problem to be achieved by the present invention is a call service according to user authentication information in a VIP network capable of forming a communication network for a closed user group constituting a communication network for a specific user only in a VIP network. It is to provide a method of providing.

In addition, a third technical problem to be achieved by the present invention is to provide a computer-readable recording medium recording a program capable of providing a call service in a VIO network.

The present invention to achieve the first technical problem,

A method of providing a call service in a VIP network including a plurality of VIP terminals and a gatekeeper, the call priority based on a preset constraint for each subscriber of the VIP terminals managed in the gatekeeper Setting a rank and storing call priority of the subscriber set in each of the gatekeeper or the plurality of VIP terminals, and a subscriber and a second V of the first VIP terminal in an area managed by the gatekeeper. The subscriber of the OIP terminal conducts a call, and during the call, the gatekeeper requests a call with the subscriber of the first VIOIP terminal in which the subscriber of the third VIP terminal in the zone is performing the call. If the gatekeeper, the second VIP terminal Retrieving the call priority of the subscriber of the third VIP terminal requesting the call with the subscriber, and providing a call service to the subscriber of the third VIP terminal according to the retrieved call priority. The present invention provides a call service providing method according to a call priority of a subscriber in a VIP network.

And, in order to achieve the first technical problem, the present invention,

A method of providing a call service in a VIP network including a VIP terminal and a gatekeeper included in a plurality of management zones, the method comprising: providing a preset constraint for each subscriber of the VIP terminal managed by the gatekeeper; Setting a call priority according to the call priority, and storing the call priority of the subscriber set in each of the gatekeeper or the plurality of VIPs, the first VIP of the area managed by the first gatekeeper. When the subscriber attempts to speak with the subscriber of the second VIP terminal in another zone, the first gatekeeper informs the second gatekeeper managing the VIP terminal in the other zone of the first VIP terminal. A second multi-byte information element storing the subscriber's call priority Transmitting, the call priority of the subscriber of the first VIO IP requesting the call according to the received second multi-byte information element in the second gatekeeper, and the retrieved first VIO IP According to the call priority of the subscriber of the terminal, the second gatekeeper transmits the Internet protocol address of the first VIP terminal to the second VIP terminal to provide a call service to the subscriber of the first VIP terminal. It provides a call service providing method according to the call priority of the subscriber in the VIP network comprising the step of providing.

In addition, the present invention to achieve the second technical problem,
A method of providing a call service in a VIP network including a VIP terminal and a gatekeeper included in a plurality of management zones, the method comprising: configuring a communication network for a closed user group targeting only a specific user in the VIP network; ; In the specific gatekeeper included in the configured closed user group communication network, an authentication identifier for the closed user group according to a preset constraint is transmitted to a VIP terminal within a zone (management zone) managed by the specific gatekeeper, and the management Storing an authentication identifier for the closed user group in each VIP terminal in an area; When the subscriber of the first VIP terminal belonging to the VIP network attempts to speak with the subscriber of the second VIP terminal in the closed user group communication network, the specific VKIP terminal receives the first VIP terminal. Requesting user authentication information from the user; Transmitting, by the first VIP terminal, user information according to its second multi-byte information element to the specific gatekeeper according to the request; And when the transmitted second multi-byte information element includes an authentication identifier for the closed user group, transmitting the Internet protocol address of the second VIP terminal to the first VIP terminal by the specific gatekeeper. Provided is a call service providing method according to user authentication information in a VIP network comprising providing a call service to a subscriber of a first VIP terminal.

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And, in order to achieve the third technical problem the present invention,

Provided is a computer-readable recording medium having recorded thereon a program capable of providing a call service according to a subscriber's call priority and user authentication information in a VIP network.

1 is a block diagram of a VIP network to which the H.323 protocol is applied.

Referring to FIG. 1, the VoIP gateways 111 and 112 are end points of a network that enables real-time bidirectional communication on a packet-based network, and are public telephones based on Internet protocols and non-Internet protocols. Performs signal processing and voice compression and restoration with non-Internet protocols such as Public Switched Telephone Network (PSTN), Integrated Services Digital Network (ISDN), and asynchronous transfer mode (ATM). One side is connected to a general voice network and the other side is connected to a packet network. In other words, the gateway performs interworking between H.323 and non-H.323 networks.

The gatekeeper 120 is a device that provides services related to call control for registered endpoints, such as terminals 121 and 122 and gateways 111 and 112 in the control region, and virtual gateways for all calls in the network. As a switch, it serves as a central point of the network and performs functions such as internet protocol address translation, number management, authentication control, call authentication, or bandwidth control.

The terminals 121 and 122 constitute one end point of real-time two-way communication on the network, and should have both a call origination and an incoming call function. In this case, the terminals 121 and 122 may be operated as Internet terminals having an IP function such as an Internet Protocol terminal (IP phone) and a personal computer (PC), and connected to a gatekeeper, a gateway, a counterpart terminal, and the like. Will be performed.

The Time Division Multiplexing Switch (TDM Switch) (151, 152) transmits TDM traffic in a time-division manner to handle large calls, thereby making a two-way call by connecting to an existing public switched telephone network, In order to connect with the terminal, a bi-directional call is made with the H.323 terminal based on the packet data converted by the VIP gateway.

In addition, the H.323 terminals 121 and 122 are obliged to support audio services, and the VIO IP network includes a public switched telephone network (PSTN) telephone network 130 and a packet data network 140. Interworking through the gateway 111, 112 having a VIP function between.

On the other hand, the network configuration according to the call between subscribers in the VIP system is as shown in Figure 2 below.

Referring to FIG. 2, first, the VIP terminal A 210 attempts to call the gatekeeper 220 to connect with the VIP terminal B 230.

The gatekeeper 220 receives the telephone number of the BIO terminal B 230 included in the call according to the call, and converts the BIP terminal B into the Internet protocol address of the BIO terminal B.

Then, the gatekeeper 220 informs the VIP terminal A 210 of the VIP terminal B 230 of the Internet protocol address.

The VIP terminal A 210 transmits the H.225 message to the VIP terminal B 230 using this address. Here, the H.225 message is a protocol that manages the creation, maintenance, and termination of calls, like ISDN's Q.931 protocol.

The H.225 message transmits a signal to the BIP terminal B 230 to ring.

The VIP terminal B 230 then transmits the H.225 connection message to the VIP terminal A 210. The VIP terminal A 210 starts negotiation with the VIP terminal B 230 for establishing a communication channel using the H.245 protocol. Similarly, the H.245 protocol is a protocol for exchanging parameter values necessary to complete a call between a terminal or gateway participating in a call, selection of a codec necessary for completion of a call, and negotiation of a port.

Then, the logical channel is opened after the H.245 negotiation between the VIP terminal A 210 and the VIP terminal B 230 to start a call.

Here, RAS (Registration, Admission, Satus), which is a protocol of H.323 substructure, uses H.225 as a protocol between an endpoint and a gatekeeper. H.225 uses messages to perform registration, access, grant, bandwidth change, status or discard procedures between the terminal and the gatekeeper.

The RAS channel uses the User Datagram Protocol (UDP) and is set in preference to any channel established between the endpoint and the gatekeeper at call setup.

In H.323, call signaling is based on Q.931, which is used in H.320 in the Integrated Services Digital Network (ISDN), and H.245 control signaling is the end that controls the operation of the H.323 endpoint. It is used to exchange end-to-end control messages. It performs functions such as channel capability exchange, logical channel start and end, and message flow control.

A typical connection procedure consists of establishing a call using H.225, then exchanging information using H.245, establishing a communication channel, and finally calling the service and ending the call.

When the RAS signaling between the terminal and the gatekeeper is open and the call is established, the H.245 control channel is established to negotiate the available capacity of the channel, and then a logical channel for data transmission is established according to the negotiation result, and a real-time transmission protocol for transmission Communication is performed using a real-time transport control protocol (RTCP), a real-time transport protocol (RTP), or a user datagram protocol (UDP).

The real time transport protocol, which is a transport protocol, is an Internet standard protocol for real time data transmission including audio and video in a packet network. This is done on the User Datagram Protocol and uses Time-Stamps to know the Sequence Number and Packet Interval to determine whether packets arrived in sequence.

The real-time transmission control protocol is a protocol used together to maintain the QoS of the real-time transmission protocol, and analyzes the network status of the real-time transmission protocol node, that is, the terminal, and periodically loses packets and jitters to each other to inform network congestion. It transmits information such as QoS such as jitter) or packet delay.

3 illustrates the call signaling of FIG. 2.

Referring to FIG. 3, the VIP terminal A attempts to call the VIP terminal B through the RAS protocol with the gatekeeper.

First, the BIP terminal A requests the gatekeeper to permit a call to the BIO terminal B through an ARQ RAS message, which is an Admission ReQuest (ARQ) message (310).

Then, the gatekeeper accepts the above call with an ACF RAS message, which is an Admission Conformation (ACF) message, to the VQ terminal A for the ARQ RAS message and informs the VIP terminal B's Internet protocol address (Adress). (320).

In response, the VIP terminal A transmits a setup message for the call to the VIP terminal B (330).

The VIP terminal B then sends a H.225 Call Proceeding message in response to the H.225 call setup message (340).

At this time, the BIP terminal B also requests permission for the call to the gatekeeper in the ARQ RAS message (350). This two ARQ messages are used because the call is bidirectional. For this reason, Bandwidth for completing a call in Call Admission Control (CAC) using a gatekeeper is 128 kbps.

Then, the gatekeeper accepts the above call as an ACF RAS message when the BIP terminal B permits the call, and transmits an ARJ RAS message (Admission ReJection: ARJ) if the call cannot be accepted. (360).

  Thereafter, the VIP terminal B transmits an Alerting message to the VIP terminal A with respect to the transmission of the H.225 Call Proceeding message 340 and the VIP terminal B with the 370. When the user of the VIP terminal A answers the call, the connection message is transmitted to the VIP terminal A (380).

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

However, embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Embodiments of the invention are provided to more fully illustrate the invention to those skilled in the art.

4 is a flowchart illustrating a call service providing method in a VIP network according to a call priority of a subscriber according to the present invention.

Referring to FIG. 4, first, in a method of providing a call service in a VIP network including a plurality of VIP terminals and gatekeepers, preset in each subscriber of a plurality of VIP terminals in an area managed by the gatekeeper The priority of call is set according to the constraint, and the call priority of the subscriber is set in the gatekeeper or the plurality of VIO IP terminals (step 410).

That is, the priority of call is set for each subscriber of the plurality of VIP terminals included in the area managed by the gatekeeper according to a specific constraint.

The specific constraints here include granting the call priority right in the organization to which the subscriber belongs, taking into account the position and position, or granting the call priority right according to the urgent and important extent of the communication, ie the content of the message to be delivered. can do.

Then, the call priority is set according to the specific constraint, and the call priority of the subscriber is set in the gatekeeper or each of the plurality of VIP terminals.

Specifically, in the case of implementing the above constraints, if the organization or company is small and the gatekeeper can accommodate VIO terminals in the management area with only one gatekeeper, the specific constraints may be applied to the inside of the gatekeeper. Integrated storage and use of the subscriber's communication priorities.

If the subscriber capacity is large and there are a plurality of gatekeepers on the VIP network, call priorities according to specific constraints may be stored in each VIP terminal and used as needed.

Next, the subscriber of the first VIP terminal and the subscriber of the second VIP terminal in the area managed by the gatekeeper perform the call (step 420).

Since the call execution process between the subscribers of the VIP terminal is the same as described above, duplicated descriptions will be omitted.

Next, when the subscriber of the third VIP terminal requests a call with the subscriber of the first VIP terminal which is already conducting the call to the gatekeeper during the call, the gatekeeper receives the second VIP terminal. The call priority of the subscriber of the third VIP terminal requesting the call with the subscriber is retrieved (step 430).

The subscriber of the first VIP terminal attempts to make a call by the subscriber of the third VIP terminal belonging to the area of the gatekeeper while the subscriber of the first VIP terminal and the subscriber of the second VIP terminal communicate with each other. This is the case.

In this case, the subscriber of the third VIP terminal should wait until the end of the call of the subscriber of the first VIP terminal, but at the end of the call even if the subscriber of the third VIP terminal needs to perform the call urgently. It is inefficient to wait until.

Therefore, the present invention has a configuration in which the call priority is set in advance according to a specific constraint and the call is connected accordingly. Accordingly, when the subscriber of the third VIP terminal requests a call with the subscriber of the first VIP terminal performing the call, the gatekeeper makes the call with the subscriber of the second VIP terminal. The call priority of the subscriber of the requested third VIP terminal is retrieved.

Here, the call priority may be retrieved by the gatekeeper by a second multi-byte information element included in data transmitted from the second VIP terminal and the third VIP terminal. A description of the two multi-byte information element will be described later.

Finally, the call service is provided to the subscribers of the third VIP terminal according to the retrieved call priority (step 440).

Specifically, the gatekeeper compares the call priority of the subscriber of the third VIP terminal with the subscriber of the second VIP terminal, so that the call priority of the subscriber of the third VIP terminal becomes the second VIP. If the subscriber's call priority is higher than the terminal's call priority, the gatekeeper connects the subscriber of the first VIP terminal to the subscriber of the third VIP terminal and the first VIP terminal and the second VIP terminal. Forcibly disconnect the call by sending a pre-scheduled signal to.

Then, the gatekeeper transmits the internet protocol address of the first VIP terminal disconnected from the call to the third VIP terminal, and thus, between the subscriber of the first VIP terminal and the subscriber of the third VIP terminal. The call will proceed.

However, the gatekeeper compares the call priorities of the subscribers of the third VIP terminal and the subscribers of the second VIP terminal, so that the call priority of the subscribers of the third VIP terminal becomes the second VIO IP terminal. When the subscriber's call priority is lower than the subscriber's call priority, the gatekeeper transmits a signal indicating that the subscriber of the first VIP terminal is busy to the subscriber of the third VIP terminal and the subscriber of the first VIP terminal. And the subscriber of the second VIP terminal to maintain the call.

Meanwhile, even in this case, a separate function may be added to enable a call for notification of important matters such as an emergency situation.

That is, even when the call priority of the subscriber of the third VIP terminal is lower than the call priority of the subscriber of the second VIP terminal, the subscriber of the third VIP terminal gatekeeper receives the emergency call message that has been previously agreed. When transmitting to, the gatekeeper transmits an emergency call message to the subscriber of the first VIP terminal to inquire about disconnection.

Then, when the subscriber of the first VIP terminal accepts the query for disconnection, the gatekeeper disconnects the call by transmitting a predetermined signal to the first VIP terminal and the second VIP terminal.

When the call is disconnected as described above, the Internet protocol address of the first VIP terminal is transmitted from the gatekeeper to the third VIP terminal to communicate with the subscriber of the first VIP terminal and the subscriber of the third VIP terminal. Will be connected.

In the present invention, in consideration of the urgency and importance of the contents of the call, such as the communication priority according to the specific constraints of the subscriber or the urgent situation of the call requester forcibly interrupts any call in the call and provides access to a new call. .

In the present invention, the Q.931 protocol used for call signaling includes various types of messages, such as setup, call proceeding, Internet protocol, port number, Necessary information such as voice codec information and telephone numbers of recipients and callers are included.

Detailed structure of Q.931 message is shown in Table 1.

As shown in Table 1, the Q.931 message format consists of an 8-bit system. A protocol discriminator is a value used to distinguish it from other protocols, indicating which protocol the message belongs to. , Q.931 is 0x08.

In addition, the Call Ref length may indicate the length of a Call Ref Value that follows, in bytes, and may be represented by two bytes in the present invention.

In addition, the Call Ref Value is a unique call reference value for the call so that it can be known which call the request related to call control belongs to. The call reference value may be represented by the most significant bit and the least significant bit.

On the other hand, the message type is a value used to classify messages used in the Q.931 protocol and represents messages related to the establishment, release, and control of all connections described in Q.931, such as circuit switching and packet switching. .

In particular, an information element (IE) means information that is additionally delivered for each message. In the present invention, information about a call priority according to a preset constraint is particularly stored in the information element.

Table 2 below shows a message type used in Q.931. As shown in Table 2, channel identifiers, incoming and outgoing telephone numbers, voice codec information and port numbers are included.

An information element (IE) indicates additionally necessary information elements. As shown in FIGS. 5A to 5C, information elements (IEs) may be composed of single byte and multi byte according to the nature and amount of information to be delivered.

FIG. 5A shows a single byte information element representing a single information element, FIG. 5B shows a first multibyte information element representing a multi information element, and FIG. 5C shows a second multi-information representing a multi information element. The byte information element is shown.

Referring to FIG. 5A, a single byte information element indicates a single information element, and may include an information element identifier and a content of 1 byte in length, that is, single byte information.

In addition, referring to FIG. 5B, the first multi-byte information element may mean a complex information element, and the length may indicate the length of the information element as 1 byte, and then the information element contents may be stored. have. The information element content may include substantial control contents.

In addition, referring to FIG. 5C, when the identifier of the information element is user information, specifically, when the identifier of the information element is 0 × 7e, the length of the information element may be 2 bytes. From then on, the user information transferred between the VIP terminals may be stored in the following information element content.

6 shows a detailed structure of a first multi-byte information element applied to the present invention.

Referring to FIG. 6, the telephone number of the subscriber of the VIP terminal is recorded in the form of the first multi-byte information element, and it may be determined whether the caller or the receiver is through the identifier of the information element.

For example, the information element identifier for the caller's telephone number may be 0x6c, and the information element identifier for the receiver's telephone number may be 0x70.

In the item for the length of the information element according to FIG. 6, B8 is an extension bit. If the bit of B8 is 1, it means a phone number from the next byte to the entire length of the information element, and the bit of B8 is 0. This means that additional information is still present.

In addition, B7 to B5 of FIG. 6 designate a recording format of a telephone number as an address type, and B4 to B1 according to an Integrated Services Digital Network (ISDN) scheme according to E.163 or E.164 standards. Indicates the numbering method.

7 shows a detailed structure of a second multi-byte information element applied to the present invention.

Referring to FIG. 7, the second multi-byte information element includes information about an identifier of a VIP terminal, a length of the information element of the VIP terminal, and call priority according to a preset constraint.

In this case, the length of the information element of the VIP terminal may be stored as a Most Significant Bit (MSB), and the length of the information element may be stored as a Least Significant Bit (LSB).

Meanwhile, in FIG. 7, when the identifier of the information element is 0 × 7e, the length of the information element may be designated as 2 bytes, and the information thereafter may refer to user information transmitted between VIO terminals.

If the identifier of the information element is 0 × 05, it may mean the H.225 protocol, in which the 1st and 2st flags indicate what information is included in the Contents item.

On the other hand, with respect to the function to be implemented in the present invention in detail as follows.

8 illustrates a call flow between VIP terminals in a call.

As shown in FIG. 8, in the VIP network, subscriber 1 of the VIP terminal and subscriber 2 of the VIP terminal are already in a call, and subscriber 3 of the new VIP terminal is a subscriber of the VIP network. Figure 2 shows a case where a call with 2 is attempted.

First, subscriber 3 of the VIP terminal attempts to call a subscriber of the VIP terminal in the management area of the gatekeeper using the gatekeeper (810). In other words, subscriber 2 of the VIP terminal is normal. If not, the gatekeeper translates the Internet address of subscriber 2 of the VIP terminal (820).

Meanwhile, the gatekeeper transmits the converted internet protocol address of subscriber 2 of the VIO terminal to subscriber 3 of the VIO terminal (830), but if the subscriber 2 of the VIO terminal is When the subscriber 1 is in a call, the gatekeeper transmits a signal indicating a predetermined call to subscriber 3 of the VIP terminal attempting the call (840).

9 is a diagram illustrating a call flow between VIP terminals according to a call priority of a subscriber of the present invention.

In FIG. 9, after setting appropriate communication priorities in consideration of constraints such as subscriber's hierarchical order in each subscriber information in the area managed by the gatekeeper and storing them in the gatekeeper in advance, call service is performed according to the subscriber's communication priority. To provide.

First, referring to FIG. 9, an appropriate communication priority is set in advance in consideration of constraints on the hierarchy of subscribers in an area managed by the gatekeeper and stored in advance in the gatekeeper. When subscriber 3 of the IP terminal attempts to make a call with subscriber 2 of the VIP terminal using the gatekeeper (901), the gatekeeper is a subscriber of the VIP terminal communicating with subscriber 3 of the VIP terminal requesting the call. A call priority of 1 is retrieved (902).

After retrieving the call priority of subscriber 1 of the VIP terminal talking to the subscriber 3 of the VIP terminal, if the call priority of subscriber 3 of the VIP terminal is higher, the gatekeeper is a VIP. Sending a predetermined signal to the subscriber 1 and subscriber 2 of the terminal and then forcibly disconnects the call (903), and converts the Internet protocol address of the subscriber 2 of the VIP terminal that the subscriber 3 wants to call the VIO IP The translated address is transmitted to subscriber 3 of the terminal (904).

After that, as described above, the subscriber 3 of the VIP terminal can perform a call with the subscriber 2 of the VIP terminal to be called through the same process as the conventional method (905).

However, if the call priority of subscriber 3 of the VIP terminal is lower than the call priority of subscriber 1 of the VIP terminal, the gatekeeper indicates to subscriber 3 that subscriber 2 of the VIP terminal is busy. Send a signal (913). Then, subscriber 3 of the VIP terminal should wait until the call between subscriber 1 and subscriber 2 ends.

In this case, in the present invention, a call is made for a notification of important matters such as an emergency and a separate process is performed as follows.

As shown in FIG. 9, when the gatekeeper confirming that subscriber 2 of the VIP terminal, which is the target of the call, is busy, transmits a signal indicating that the subscriber 3 of the VIP terminal requesting the call is busy, Subscriber 3 of the VIP terminal transmits another signal previously agreed to for the purpose of an emergency call to the gatekeeper (914).

Then, the gatekeeper transmits a message informing of an emergency call to subscriber 2 of the VIP terminal in a call, and transmits a signal to the subscriber 2 of the VIP terminal inquiring whether there is a call disconnection currently in progress (915).

On the other hand, if the subscriber 2 of the VIP terminal agrees to disconnect the call with the subscriber 1 of the VIP terminal (916), the gatekeeper disconnects the call between the subscriber 1 and the subscriber 2 of the VIP terminal ( In step 917, the Internet protocol address of subscriber 2 of the VIO terminal is converted and transmitted to subscriber 3 of the VIO terminal (918).

Then, subscriber 3 of the VIP terminal transmits an H.225 message to subscriber 2 of the VIP terminal using the Internet protocol address (919). When the subscriber 2 of the V. IP terminal receives the H.225 message, the subscriber 2 of the V. IP terminal sends the H.225 connection message to the subscriber 3 of the V. IP terminal (920), and the V.IP. Subscriber 3 of the terminal starts negotiation of communication channel with subscriber 2 of VIO terminal using H.245 protocol, logical channel is opened after negotiation of H.245, subscriber 2 of VIP terminal and subscriber 3 of VIP terminal The call between starts (921).

Networks with gatekeepers need to be aware of bandwidth release. At the end of the call, H.245 must send a Disengage ReQuest message (DRQ) to its gatekeeper through the RAS channel, and the gatekeeper must respond with a Dis- tance ConFirmation (DRF). After sending the subscription revocation message, VIP terminals can no longer send a message to the gatekeeper. Therefore, if the subscription withdrawal message is received, the call ends from that point.

FIG. 10 illustrates call signaling of FIG. 9.

Since the call signaling is redundant with the above description, a detailed description thereof will be omitted. In FIG. 10, ARQ represents an Admission ReQuest (ARQ), ARJ represents an Admission ReJect (ARJ), ACF represents an Admission ConFirmation message, and DRQ represents a subscription withdrawal request message. (Disengage ReQuest: DRQ), and DCF stands for Disengage ConFirmation (DCF).

11 illustrates a VIO configuration in which a management zone of the present invention includes different gatekeepers.

In the network as shown in FIG. 11, when the subscriber F of the BIO terminal of the management zone L wants to talk to the subscriber J of the VIO terminal of the management zone N, the first entry of the information elements is transmitted to the gatekeeper of the management zone N. 2 Sends the sender's communication priority information using multi-byte information elements.

As the gatekeeper does not store the communication priority information of the subscribers having different management zones, the caller requests the second multibyte information to the gatekeeper of the management zone to which the subscriber wants to call when the caller requests a call between subscribers leaving the management zone. Element to send information about constraints, including sender and receiver communication priorities.

In this case, the information to be transmitted utilizes a second multibyte information element, has the same configuration as the above-described second multibyte information element, and the information of the subscriber of the VIP terminal included in the second multibyte information element is 0. It may be x7e and may include 0x05, which means information indicating the H.225 protocol.

The communication priority of the subscriber of the VIP terminal is given at the time of initial registration, and may be classified into a plurality of groups according to the size and grade of the subscriber. In addition, parts of communication contents such as an emergency situation may be classified and applied to a plurality of groups in consideration of a user's environment.

On the other hand, when configuring a closed user group communication network constituting a communication network for a specific user in the VIP network, the gatekeeper that gives each terminal specific information indicating a normal user and manages the closed user group After receiving the corresponding information from each terminal through the authentication process to check whether the user is a normal group can be allowed to access the communication network.

Even in this case, the information transmission of the subscriber of the VIP terminal may use the second multi-byte information element.

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

As described above, according to the present invention, in a VoIP environment, even if a communication subscriber is in a call, the subscriber having a high communication priority attempts to make a call or an emergency situation such as fire or theft occurs. If you must make a call with the other party, or if you do not have time to wait until the end of the existing call due to a certain condition set in advance, the call is forcibly terminated in the middle of the call even though the communication party is busy. After making an emergency call to ensure a prompt call, and after the emergency call is terminated, there is an effect of improving the reliability of the call by restoring the existing forcibly terminated call.

Claims (13)

delete delete delete delete delete delete delete delete delete delete delete A call service providing method in a VIP network including a VIP terminal and a gatekeeper included in a plurality of management zones, Configuring a communication network for a closed user group targeting only a specific user in the VIP network; In the specific gatekeeper included in the configured closed user group communication network, an authentication identifier for the closed user group according to a preset constraint is transmitted to a VIP terminal within a zone (management zone) managed by the specific gatekeeper, and the management Storing an authentication identifier for the closed user group in each VIP terminal in an area; When the subscriber of the first VIP terminal belonging to the VIP network attempts to speak with the subscriber of the second VIP terminal in the closed user group communication network, the specific VKIP terminal receives the first VIP terminal. Requesting user authentication information from the user; Transmitting, by the first VIP terminal, user information according to its second multi-byte information element to the specific gatekeeper according to the request; And When the transmitted second multi-byte information element includes the authentication identifier for the closed user group, the specific gatekeeper transmits the Internet protocol address of the second VIP terminal to the first VIP terminal by transmitting the Internet protocol address. 1. A method of providing a call service according to user authentication information in a VIP network comprising providing a call service to a subscriber of a VIP terminal. A computer-readable recording medium having recorded thereon a program for executing the method of claim 12 on a computer.

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