KR20030020186A - Auto routing apparatus and method by IP network state - Google Patents

Abstract

PURPOSE: An automatic routing method according to IP(Internet Protocol) network states and a device therefor are provided to automatically changes a routing path or changes a connection to PSTN(Public Switched Telephone Network) according to the network states, so as to adjust tone quality. CONSTITUTION: An originating user selects a call mode(S101) to select whether to perform the call through an Internet network using LAN or through PSTN(S102). If the originating user selects PSTN, a general call process is performed(S103). If the originating user selects LAN, a call through the Internet network is connected(S104) and a LAN monitoring mode is started(S105). Voice data are inputted from the originating party through a phone(S106), and whether a monitoring information message is received from a data receiving party in a predetermined time T1 is checked(S107). The main controller checks whether fault information exists in the monitoring information message(S108). If the monitoring information message is for a compression rate change, the main controller commands the change of a voice compression rate to a media controller(S110). If the monitoring information message is for fault generation, whether a LAN fault message is received N times continuously is checked(S110). If so, the main controller suspends the LAN monitoring mode and informs the originating user of the LAN fault(S111), then inquires of the originating user of whether to end the call(S112). If not, whether to select a LAN call mode or a PSTN call mode is inquired of the originating user(S113). If the originating user selects the LAN call mode(S114), the main controller selects a new routing path to re-originate a call(S116) and the step S105 is returned. If the originating user selects the PSTN call mode, the main controller ends the LAN monitoring mode(S115) and performs a general call process through the PSTN(S103).

Description

Automatic routing apparatus and method according to IP network state {Auto routing apparatus and method by IP network state}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a routing method for connecting a sender and a receiver in a network for telephony over the Internet, and in particular, an internet telephony gateway system (ITGS) or a voice over internet protocol (VoIP). protocol) Automatic routing device according to the IP network status to transfer the data through the IP network, such as the system to enable the system to make a phone call variably apply the routing or transmission data rate, etc. according to the status of the IP network; It is about a method.

Internet Telephony System or Voice Support Internet Protocol System is a system that enables users to use telephones through the Internet network instead of public telephone networks.It compresses and packetizes voice signals and delivers them to the other party through the Internet network. It is a system that can be implemented at a lower cost than existing public telephone networks.

1 is a block diagram showing a configuration for a telephone call using a conventional IP network.

Referring to FIG. 1, for a telephone call using an IP network, a caller / receiver for an analog interface of a telephone 10/10 'of the calling / receiving side and voice data inputted from the phone 10/10'. Analogue interface unit 20/20 'and the originating / receiving side system 30/30' for converting and transmitting voice data transmitted from the analog interface unit 20/20 'to suit the Internet LAN environment. And a transmission / reception side LAN interface unit 40/40 'for interfacing data transmitted from the system 30/30' according to a LAN environment, and transmitted from the LAN interface unit 40/40 '. Internet network 50 for transmitting and receiving data to the calling party and the called party is configured.

Connecting a call for a telephone call using the IP network configured as described above is that when the caller makes a call using the called party's telephone number to the calling party's telephone 10, the called party's telephone is connected to the called party's LAN. The call is transmitted to the IP address corresponding to the number, and the called telephone 10 'rings through the called LAN interface unit 30' to notify that the call is received and to make a call.

In particular, the system 30/30 'is a voice codec 32/32 for compressing or demodulating voice data transmitted from the analog interface 20/20' by pulse code modulation (PCM). ') And a packet part 31/31' for packetizing PCM data or converting packet data into PCM data in the voice codec.

With reference to the accompanying drawings, a method for transmitting and receiving voice data of a telephone call using an IP network after a call is connected in the above network will be described in more detail.

2 is a flowchart illustrating an operation procedure of a voice data transmission / reception method of a telephone call using a conventional IP network.

Referring to FIG. 2, when the calling telephone 10 transmits a call (S11), a call is connected through the called telephone 10 ′ and the internet network 50 (S12).

When the call is connected, when the caller / called party speaks the application through the telephone 10/10 ', voice data is input through the analog interface 20/20' (S13), and the voice data is transmitted to the system 30 /. 30 ') is compressed into PCM data in the voice codec 32/32' (S14).

The compressed PCM data is packetized in the packet part 31/31 '(S15) and transmitted to the LAN interface part 40/40' (S16).

The LAN interface unit 40/40 'transmits packet data to the destination / calling side LAN interface unit 40' / 40 through the Internet network 50 (S17), and the received packet data is transmitted to the system 30. The packet unit 31 '/ 31 of' / 30 'is converted into PCM data (S18), and the voice codec 32' / 32 is converted into voice data (S19).

The voice data is output to the telephone 10 '/ 10 through the analog interface 20' / 20 (S20) so that the subscriber can make a call.

The data transmission and reception process is repeated until the call is terminated (S21) to enable a telephone call through the Internet network.

However, the telephone call method through the IP network as described above greatly depends on the quality of the Internet network, that is, the IP network.

That is, when the load of the IP network becomes large and the data transmission rate becomes slow, the subscriber may feel that the voice in the telephone call is cut off, the silent state continues, or the call is severely broken.

In order to solve the current problem, a method of allocating bandwidth by using a quality of service (QoS) technology may be used, but this method requires that the router of the LAN interface unit connected to the network supports the QoS method.

Accordingly, the conventional IP communication method has a problem in that the call quality is significantly lowered according to network conditions, and there is a problem in that a router supporting QoS technology is required to solve such a problem.

In order to solve the above problems, in the telephone call method using the IP network of the present invention, the call quality is changed according to the network state, and the router is automatically routed according to the state of the network in the conventional method where a router supporting QoS technology is required. Additional system configuration to control the call quality by changing the route or changing the connection to the public telephone network to automatically maintain the high call quality regardless of the IP network status. Its purpose is to provide a routing method and apparatus.

1 is a block diagram showing a configuration for a telephone call using a conventional IP network.

2 is a flowchart illustrating an operation procedure of a voice data transmission / reception method for a telephone call using a conventional IP network.

Figure 3 is a block diagram showing the configuration of the automatic routing device according to the IP network state according to an embodiment of the present invention.

4 is a flowchart illustrating a network state monitoring operation procedure at a data transmission side of an automatic routing method according to an IP network state according to an embodiment of the present invention.

5 is a flowchart illustrating a network state monitoring operation procedure at a data receiving side of an automatic routing method according to an IP network state according to an embodiment of the present invention.

<Brief description of the main parts of the drawings>

10, 10 ', 100, 100': phone

20, 20 ', 200, 200': analog interface

30, 30 ', 300, 300': system 310, 310 ': main fisherman

31, 31 ', 322, 322': packet part 32, 32 ', 321, 321': voice codec

320, 320 ': media processing unit 330, 330': memory

40, 40 ', 400, 400': LAN interface unit

50, 500: Internet network 600: Public telephone network

Automatic routing device according to the IP network state according to the present invention,

A telephone for making a telephone call according to an originating or incoming call by a subscriber;

An analog interface unit for transmitting the voice data input from the telephone to a system for transmitting to an IP network or to a public telephone network;

A media processing unit including a voice codec for compressing voice data transmitted from the analog interface unit and a packet unit for packetization;

A main control unit for changing the voice data compression ratio of the media processing unit according to the state of the IP network, resetting routing, and switching a call connection to a public telephone network;

A memory for storing announcements for guiding the IP network status to a user;

And a LAN interface unit for receiving the packetized data from the media processing unit and transmitting the packetized data to the IP network.

Preferably, the media processing unit includes a voice codec for compressing voice data into digital data or converting the digital data into voice data, and a packet for packetizing the digital data compressed in the voice codec or converting the packet data into digital data. Characterized in that it comprises a part.

In addition, the automatic routing method according to the IP network state according to the present invention,

Connecting a call through an IP network to start monitoring a LAN state in a main control unit at a data transmitting side;

Receiving, by the main controller, monitoring information transmitted every predetermined time from a receiving side and transmitting a response message;

Determining whether abnormality of the received monitoring information message has occurred by a specific number or more;

As a result of the check, if a failure occurs continuously for a predetermined number of times or more, terminating a LAN state monitoring mode and providing a calling party user with a LAN failure notification message and a call termination or a new call mode selection message;

The user selects a new call mode as a LAN call, resets routing information, connects a new LAN call, and restarts the LAN state monitoring mode.

Preferably, as a result of determining whether there is an abnormality of the monitoring information, if the failure occurs less than a certain number of times, the compression rate of the media processing unit is changed to be equal to the compression rate of the receiving side.

Preferably, in case of LAN failure, when the user selects a new call mode as a public telephone network call, the user connects a call through the public telephone network.

Preferably, the receiving side for receiving the voice data

Determining a LAN failure by using information of the received packet data;

Transmitting a monitoring information message to a calling party when the LAN failure occurs and waiting for a response message;

If the response message is not received for a certain period of time characterized in that it comprises a step of releasing the call connection.

Preferably, determining the LAN failure,

When the packet data received more than a predetermined number of times the time delay and the loss value is determined to be a LAN failure, it is determined that the LAN failure.

The automatic routing apparatus and method according to the IP network state according to the present invention configured as described above will be described with reference to the accompanying drawings.

3 is a block diagram illustrating a configuration of an automatic routing device according to an IP network state according to an exemplary embodiment of the present invention.

Referring to FIG. 3, an outgoing / receiving side analog interface unit 200/200 'for an outgoing / receiving side phone 100/100' and an analog interface of voice data input from the phone 100/100 '. And the calling / receiving side system (300/300 ') for converting and transmitting voice data transmitted from the analog interface unit 200/200' according to the Internet LAN environment, and monitoring the LAN state to change the call mode. ), An outgoing / receiving side LAN interface unit 400/400 'for transmitting and receiving packet data transmitted from the system 300/300' to the Internet network, and an internet network 500 and a public telephone network 600. do.

In addition, the system 300/300 ′ is a media processing unit 320/320 ′ for compressing and packetizing voice data transmitted from the analog interface unit 200/200 ′, and monitors the LAN state of the LAN. In the event of a failure, the router reconfigures the route to another path or switches the call mode to the public telephone network 600, and the main control unit 310/310 'detects a LAN failure in the main control unit 310/310'. And a memory 330/330 'for storing announcements for informing.

The media processing unit 320/320 'includes a voice codec 321/321' for compressing voice data and a packet unit 322/322 'for packetizing.

The automatic routing setting method according to the IP network state according to the present invention configured as described above will be described with reference to FIGS. 4 and 5.

4 is a flowchart illustrating a network state monitoring operation procedure at a data transmitting side of an automatic routing method according to an IP network state according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the calling party first selects a call mode (S101), and selects whether to make a call through the Internet network 500 using a LAN or a call through a public telephone network (S102).

At this time, when the calling user selects a public telephone network call, the telephone call is made in the same manner as a general telephone through the existing public telephone network (S103).

However, when the calling user selects a LAN call, a call through the Internet network 500 is connected (S104), and the LAN state monitoring mode of the main control unit 310 of the calling system 300 is started (S105). .

In the monitoring mode, when the sender inputs the voice data through the phone 100 (S106) and transmits the data, it waits for a predetermined time T1 to check whether the monitoring information message is received from the data receiver (S107). . At this time, the monitoring information message has the compression rate change information or network network failure information due to the state unrest of the IP network.

Therefore, when the monitoring information message is received, the main controller 310 checks whether there is abnormal information such as a LAN failure in the monitoring information message (S108), and if the message is about a change in compression rate that is not an abnormal LAN state, the media control unit 320. Command to change the voice compression rate to change the calling voice compression rate to be equal to the receiving compression rate (S110).

However, if the monitoring information message is a message about an abnormal occurrence, it is confirmed whether the LAN failure message has arrived N times or more consecutively (S109), and if the failure message arrives less than N times, the voice compression rate is changed (S110). If more than N failure messages have been received, it is determined that the LAN state of the IP network is abnormal. In this case, N may be set by the user to any integer value.

If the LAN state abnormality is determined, the main control unit 310 temporarily stops the LAN state monitoring mode, loads the announcement stored in the memory 330 and outputs it to the calling party to inform the LAN failure (S111), and terminates the call. In step S112, the caller selects a LAN call or a public telephone network call mode when the calling user selects to continue the call (S113).

When the calling user selects a new call mode as a LAN call mode according to the LAN failure (S114), the main controller 310 selects a new routing path to redial the call (S116), and monitors the LAN state again when the call is connected. The process from step S105 of starting the mode is repeated until the call ends.

In addition, if the new call mode is selected as a public telephone network call, the LAN state monitoring mode ends (S115). To make a call by connecting a call through a public telephone network (S103).

When sending a message from the calling party to the called party as described above, the called party receiving data while determining the LAN status according to the monitoring information message transmitted from the called party is automatically configured to use the data transmitted from the calling party. It sends the monitoring information to determine the LAN status to the calling party.

That is, the process of transmitting the monitoring information from the data receiving side in more detail as follows.

5 is a flowchart illustrating a network state monitoring operation procedure at a data receiving side of an automatic routing method according to an IP network state according to an embodiment of the present invention.

Referring to FIG. 5, when a call is initiated by a call connection request from a calling party (S201), the receiving party determines whether the connected call is a LAN call through an IP network (S202), and establishes a public telephone network instead of a LAN call. If the call is connected through a telephone call through a conventional public telephone network, the call is made (S204).

However, if the call is a LAN call over the IP network, the main control unit 310 'starts monitoring the LAN state (S203), and compares and analyzes information such as delay time and loss value of the packet received from the calling party with a constant average value. It is managed (S205). At this time, if the delay time or loss value of the received packet is more than a certain average value means that the LAN state is unstable, the average value can be arbitrarily designated by the user.

As described above, it is determined whether packets having a delay time or loss value of the received packet equal to or more than a predetermined average value are received at least M times in succession (S206), and when M or more times are received, a network monitoring information message is transmitted to the calling party ( S208). At this time, the monitoring information message has a content of the occurrence of a LAN failure.

Further, even if a packet whose delay time or loss value is equal to or greater than a constant average value is not received more than M times in step S206, the main controller 310 'of the receiving side transmits the monitoring information message at regular time intervals. S208). At this time, the monitoring information mesh has LAN state information including compression rate information of the calling party. At this time, M is also defined by the user as an integer value.

The main control unit 310 ′ having sent the LAN status monitoring information message waits for a response to the monitoring information message from the calling party for a predetermined time T2 (S209), and when the response is received (S210), monitors the LAN status monitoring from step S205. The call is repeated until the call is terminated, and if the monitoring information message is not received for a predetermined time T2, the call is determined to be a LAN failure and the call is terminated (S211).

As described above, the present invention monitors the LAN status in the main controller of the calling party and the called party, respectively, and transmits and receives LAN status information, thereby automatically changing the voice compression rate when the LAN status is unstable, or routing in case of LAN failure. It is to be able to reset or switch the connection to the public telephone network.

In addition, the user can hear the LAN failure status guide message during the call, it is easy to determine the LAN status.

As described above, the automatic routing apparatus and method according to the IP network state according to the present invention monitors the network state in the telephone call through the IP network and changes the voice compression rate according to the change of state, or user in case of LAN failure. The user can easily identify the LAN status, improve the call quality, and transfer the phone to the public telephone network even in the event of a LAN failure by informing the user of a failure condition and selecting a reset or a call connection change to the public telephone network. There is.

Claims (6)

A telephone for making a telephone call according to an originating or incoming call by a subscriber; An analog interface unit for transmitting the voice data input from the telephone to a system for transmitting to an IP network or to a public telephone network; A media processing unit including a voice codec for compressing voice data transmitted from the analog interface unit and a packet unit for packetization; A main control unit for changing the voice data compression ratio of the media processing unit according to the state of the IP network, resetting routing, and switching a call connection to a public telephone network; A memory for storing announcements for guiding the IP network status to a user; And a LAN interface unit for receiving the packetized data from the media processing unit and transmitting the packetized data to the IP network. Connecting a call through an IP network to start monitoring a LAN state in a main control unit at a data transmitting side; Receiving, by the main controller, monitoring information transmitted every predetermined time from a receiving side and transmitting a response message; Determining whether abnormality of the received monitoring information message has occurred by a specific number or more; As a result of the check, if a failure occurs continuously for a predetermined number of times or more, terminating a LAN state monitoring mode and providing a calling party user with a LAN failure notification message and a call termination or a new call mode selection message; Wherein the user selects a new call mode as a LAN call, resets routing information, connects a new LAN call, and restarts the LAN state monitoring mode. Way. The automatic routing method according to the IP network state according to claim 2, wherein the compression rate of the media processing unit is changed to be equal to the compression rate of the receiving side when a failure of less than a specific number of times occurs as a result of the abnormality determination of the monitoring information. The method of claim 2, wherein when the LAN is selected, the user selects a new call mode as a public telephone network call and connects a call through the public telephone network. The receiving side of claim 2, wherein the receiving side receives the voice data. Determining a LAN failure by using information of the received packet data; Transmitting a monitoring information message to a calling party when the LAN failure occurs and waiting for a response message; If the response message is not received for a certain period of time, the method comprising the step of releasing a call connection, characterized in that the automatic routing method according to the IP network status. The method of claim 5, wherein determining the LAN failure, The automatic routing method according to the IP network status, characterized in that the LAN failure is determined when the packet data received more than a predetermined number of times the time delay and the loss value is more than a predetermined average value.