KR100565576B1 - Method and apparatus for supporting multi-conversation LAN Telephony system - Google Patents

Abstract

In a LAN telephony system, a call control module that receives a call-related command from a user through a user interface and controls call connection and call termination, and a call processing module that outputs a call setting or call change signal according to the output of the call control module. And a media management module for controlling a voice channel to be supported for each call according to the output of the call control module, and collecting and recording a user's voice according to the output of the call control module or reproducing voice data received through a data network. It consists of media processing module. It is easy and various LAN telephony system by adding call processing module that responds to connection request for multiple call or single call and call control module that receives and manages information about each call. To maintain, maintain and expand the system There is something that can be effective.

Multi call

Description

Method and apparatus for supporting multi-conversation LAN Telephony system of LAN telephony system

1 shows a typical LAN telephony system

2 is a diagram showing the infrastructure of a LAN telephony system according to the prior art;

3 is a diagram illustrating an apparatus for supporting multiple calls in a LAN telephony system according to the present invention.

4 is a flowchart illustrating a method of connecting an external call in a LAN telephony system according to the present invention.

5 is a flowchart illustrating a multi-call support method of a LAN telephony system according to the present invention.

Explanation of symbols for main parts of the drawings

21: LAN Telephony User 22: LAN Telephony Application System

23: call control module 23a: the first call management module

23b: second call management module 23c: multiple call management module

23d: media management module 24: call processing module

25: media management module 25a: media processing control module

25b: Media data transmission / reception module 26: Media processing module

27: signal transmission module 28: data transmission and reception protocol

29: Media I / O

The present invention relates to a LAN telephony system, and more particularly, to an apparatus and method for supporting a multi-call in a LAN telephony system that can receive and manage information on a connection request for a multi-call or a single call in a batch.

In general, LAN telephony system supports one call at a time like a conventional telephone. Due to the nature, a specific line is not assigned to a user, but network resources are allocated whenever a call is requested. It has an infrastructure that can be flexibly adjusted by software.

Hereinafter, a LAN telephony system according to the prior art will be described with reference to the accompanying drawings.

1 is a view showing a LAN telephony system according to the prior art.

As shown in FIG. 1, the call server 1 performs central control, such as adjusting the quality of service by measuring user information management and congestion in the data network 6, and the gateway 2 performs the data. By modifying the different signaling systems of the telephone network 6a by the network 6 and the external telephone 5 to be the same, the telephone network 6a is replaced with the external telephone 5 via the telephone network 6a to the data network 6. Create channels and exchange data.

In addition, the additional service server 4 includes a plurality of user systems 3 to be used by a plurality of users connected to the data network 6 to make a call, and a voice mailbox and a fax service connected to the data network 6. It is in charge of the same additional service.

2 is a view showing the substructure of the LAN telephony system according to the prior art.

The call processing module 13 processes a call connection signal, the media processing control module 14 sends and receives a signal to open a voice channel after a call connection, and the media processing module 15 communicates with a user to send and receive media. It is in charge of I / O and I / O with data network.

The signal transmission module 16 performs data communication with the call processing module 13 and the media processing control module 14, and the media transmission module 17 performs data communication with the media processing module 15. do. Here, the signal transmission module 16 is made of a protocol such as TCP or UDP / IP, and the media transmission module 17 is made of RTP or RTCP.

Each of the above modules is designed to handle one call, and in order to support multiple calls, the call processing module 13 processes a new call connection request, and controls the media processing control on the result of the call connection request. Send to module 14.

Subsequently, the media processing control module 14 manages the media channels for each call by referring to the call signal transmitted from the call processing module 13, and in this case, the media processing module 15 performs data communication with the user. Voice can be sent to the appropriate subject.

However, the local area network communication system according to the prior art has the following problems.

First, in order to support multiple calls, duplicate call management is performed by having all basic modules support necessary functions while managing information on multiple calls separately.

Second, due to duplicate call management, extra effort is required to ensure the integrity of data.

Third, the development burden for each call management module is increased when a system specification is changed or expanded.

Accordingly, an object of the present invention is to provide a communication system of a local area network that enables multi-call and media data transmission and reception by allocating network support whenever a call connection request is made.

A feature of the present invention is that in a LAN telephony system, in a LAN telephony system, a call control module that receives a call-related command from a user through a user interface and controls a call connection and call termination, and establishes a call according to the output of the call control module. Or a call processing module for outputting a call change signal, a media management module for controlling a voice channel to be supported for each call according to the output of the call control module, and collecting and recording a user's voice according to the output of the call control module. And a media processing module for playing the voice data received through the network.

Hereinafter, a multi-call support apparatus and method of a LAN telephony system according to the present invention will be described with reference to the accompanying drawings.

3 is a view showing a multi-call support apparatus of a LAN telephony system according to the present invention, Figure 4 is a flow chart illustrating a method for connecting an external call of the LAN telephony system according to the present invention, Figure 5 is a LAN telephony according to the present invention This is a flow chart showing the method for requesting a new call connection from outside the system.

As shown in FIG. 3, the present invention always receives a call processing module 24 that responds to a connection request for a multi-call or a single call, and receives information on each call from the call processing module 24 in a batch. Call management module 23 that manages automatically, the media management module 25 that is associated with the voice channel to support the call for each call managed by the call control module 23, and the user's voice is collected and recorded; And a media processing module 26 for playing the voice data received through the data network.

Here, the media management module 25 is composed of a media processing control module 25a and a media data transmission / reception module 25b.

The call processing module 24 exchanges system control signals with a counterpart user or a server managing call settings to set or change a call, and manages a call connection request from the outside or the inside, in addition to the current call information. Generate or respond to signals that arrive.

The call control module 23 receives a call-related command from a user through a user interface, or outputs newly input call information, and a call received from the call processing module 24. A second call management module 23b for determining whether to connect a call according to information, a multi-call management module 23c for performing call management of several users according to the output of the second call management module 23b, and The media management module 23d outputs a control signal to the media processing module according to the output of the multi-call management module 23c.

The first call management module 23a receives a call-related command from a user through a user interface (not shown) in the LAN telephony application system 22 or outputs newly input call information.

The second call management module 23b receives call information from the call processing module 24 and determines whether or not a real call is connected through an interface with the first call management module 23a.

In addition, the multi-call management module 23c activates the appropriate call and detects the end of the call according to the output of the second call management module 23b.

The media management module 23d generates and manages the media processing control module 25a and the media data transmission / reception module 25b when the call is connected, or connects the media processing module 26 to the media processing module 26.

The media processing control module 25a generates a data channel using a system control signal protocol, and applies the agreed transmission protocol and voice data compression / restore method to the media processing module 26 and the media data transmission / reception module 25b. To control.

In addition, by continuously transmitting and receiving a signal during a call, the media data channel specification can be adjusted as needed even during a call.

The media data transmission / reception module 25b transmits / receives voice data using a multimedia data transmission / reception protocol such as RTP, and uses a separate network interface resource (network communication port) for each call to apply a transmission protocol differently depending on the call. Can be.

The media processing module 26 is composed of a hardware voice input / output module (not shown), a media data reconstruction and mixing module (not shown), and a media data compression module (not shown).

The hardware voice input / output module (not shown) records a user's voice using a microphone and allows the user to hear the voice restored through the speaker.

The media data restoration and mixing module (not shown) transmits the media data to the counterpart via the media channel opened by the media data control signal.

In addition, the media data compression module (not shown) may use different voice data restoration and compression algorithms for each call, and the module may also be generated for each call, but a single voice-related hardware module is provided so that each module has hardware. Since accessing to the system may cause a malfunction of the system, the media processing module 26 accesses the corresponding hardware, and the call control module supports multiple calls using information of the media related module.

The multi-call support method of the above-described LAN telephony system will be described with reference to FIGS. 4 to 5.

First, when making a call to the outside, referring to FIG. 3, the user inputs a phone number of the other party through a user interface and performs a call (S1).

Subsequently, the call control module outputs a call connection request signal to the phone number input to the call processing module (S2).

The call processing module determines whether a response signal for receiving a call from the other party is input (S3).

As a result of the determination (S3), when a response signal for receiving a call from the other party is input to the call processing module, a response signal and a telephone connection success signal are output to the call control module (S4).

Subsequently, the call control module sets multi-call information and generates and initializes a media processing control module and a media data transmission / reception module to be used for a new call (S5).

The media processing control module determines a transmission protocol and a voice compression / restoration algorithm to be used for transmitting and receiving voice data using the system control signal with the counterpart (S6).

In addition, the call control module allocates a shared buffer for transmitting / receiving data received by the media data transmission / reception module and data processed by the media processing module, and outputs this information to each module (S7).

Then, the media processing module restores the voice by referring to the contents of the shared buffer, or compresses the recorded voice and hands it over to the media data transmission / reception module through the shared buffer, and the media data transmission / reception module transfers the contents of the shared buffer to the predetermined protocol. According to the transmission to the other party through the data network, or stores the received data in the shared buffer (S8).

Subsequently, when the call termination information is transmitted through the call processing module, the call control module returns the allocated media processing control module and media data transmission / reception module resources, and outputs a call termination signal to the media processing module (S9).

Meanwhile, when a new call connection request is received from the outside, the operation of the subsystem of the LAN telephony system will be described with reference to FIG. 5.

First, if another user's connection request is input to the call processing module, the connection request signal is output to the call control module (S11).

Then, the call control module notifies the user of the call request and detects whether the user responds (S12).

Subsequently, if there is a response from the user, the call currently being held is temporarily suspended and a response signal is output to the requested call (S13).

The call control module switches the ongoing phone connection to the suspended state, adds new call information to the multi-call module, and authenticates the call connection request (S14). At this time, a media processing control module and a media data transmission / reception module to be used for a new call are generated and initialized.

Subsequently, the call processing module outputs a call connection request acknowledgment signal to the counterpart (S15).

The media processing control module determines a transmission protocol and a voice compression / restore algorithm to be used for transmitting and receiving voice data using the system control signal with the counterpart (S16).

Then, the call control module outputs a transmission protocol and a compression / restore algorithm to the media data transmission / reception module and the media processing module by using the information received from the media processing control module (S17).

In addition, the call control module allocates a shared buffer for transmitting / receiving data received by the media data transmission / reception module and data processed by the media processing module, and outputs this information to each module (S18).

The media processing module restores the voice by referring to the contents of the shared buffer or compresses the recorded voice and delivers it to the media data transmission / reception module through the shared buffer, and the media data transmission / reception module transmits the contents of the received shared buffer to a predetermined protocol. According to the transfer to the other party through the data network, or stores the received data in the shared buffer (S19).

Subsequently, when the call termination information is transmitted through the call processing module, the call control module returns the assigned media processing control module and the media data transmission / reception module, and recognizes the current call termination in the media processing module (S20).

In operation S21, it is determined whether a previously held call exists.

As a result of the determination (S21), if a call previously held does not exist, the telephone connection is kept in a standby state (S22).

On the other hand, the determination result (S21), if there is a call previously held, it is determined whether the call to resume is selected (S23).

Subsequently, when the determination result (S23), the user selects a call to resume, the call control module activates the media processing control module and the media data transmission / reception module of the corresponding call, and outputs the activated shared buffer information to the media processing module. It returns to S28 (S24).

As described above, in order to modularize system components, easily extend the specifications of calls to be supported by the system, and to provide various functions such as call forwarding or transfer when attempting a call connection, the call processing module is extended.

In addition, in order to support three-way calls and various calls supporting different compression / restore algorithms simultaneously in multiple currencies, a media control processing module and a media transmission / reception module are additionally developed according to each characteristic. Regardless of module operation, the module is generated and processed for each call.

Therefore, the local area network communication system according to the present invention is easy and various LAN by adding a call processing module that waits for a connection request for multiple calls or a single call and a call control module that receives information about each call and manages them collectively. Implementing a telephony system has the effect of making the system easy to maintain, maintain and expand.

Claims (4)

In a LAN telephony system, A call control module that receives a call-related command from a user through a user interface and controls call connection and call termination; A call processing module for outputting a call setting or a call change signal according to the output of the call control module; A media management module controlling a voice channel to be supported for each call according to the output of the call control module; And a media processing module configured to collect and record a user's voice according to the output of the call control module or to play voice data received through a data network. The method of claim 1, The call control module may include a first call management module configured to receive a call-related command from a user through a user interface or to output newly input call information; A second call management module for determining whether to connect a call according to call information received from the call processing module; A multi-call management module for performing call management of several users according to the output of the second call management module; And a media management module for outputting a control signal to the media processing module according to the output of the multi-call management module. In a multi-call support method of a LAN telephony system having a call processing module and a call control module, Inputting a phone number of the other party and detecting whether a telephone connection response signal is output from the call processing module; Outputting a call connection signal to the call control module if a call connection response signal is present from the call processing module as a result of the detection, and determining a transmission protocol and a voice compression / restore algorithm to be used for transmitting and receiving voice data; Transferring the transmission protocol and the voice compression / restore algorithm determined in the step to the subsystem, and allocating a shared buffer to be transmitted / received with the subsystem; Delivering the contents of the allocated shared buffer to the counterpart through a protocol determined after voice restoration and compression; And, When the end signal of the call is delivered to the call processing module comprising the step of recognizing the end of the call. In a multi-call support method of a LAN telephony system having a call control module and a call processing module, Determining whether a connection request signal from another user is applied to the call processing module and outputting a connection request signal to the call control module and detecting a user's response when a connection request signal from another user is applied; If the response is found from the user as a result of the detection, the call control module placing the ongoing call on hold and authenticating a new call connection request; Determining a transmission protocol and a voice compression / restore algorithm to be used for transmitting and receiving voice data after outputting the new call connection request authentication signal to the other party; Allocating a shared buffer for transmitting to the determined transport protocol and voice compression / restoration algorithm subsystem and transmitting and receiving data with the subsystem; Storing the contents of the allocated shared buffer in the shared buffer, the data being transmitted or received to the other party through the determined transmission protocol; Outputting a current call termination signal when a call termination signal is transmitted to the call processing module; And, LAN telephony characterized in that it comprises the step of determining whether there is a call held before the end of the call, and if the call is on hold, outputting the held call list to the user and selecting the call to resume. How to support multiple calls in your system.

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