KR20010054038A - Method for fixing call in a asynchronous transfer mode exchange - Google Patents

Abstract

PURPOSE: A method for setting a call of an asynchronous transmitting mode exchanger is provided to process a call requested from a transmitting terminal by using one call processing unit child process. CONSTITUTION: A transmitting terminal dials a telephone number of a receiving terminal and transmits a set-up message to a transmitting port(201). A transmitting port receives the set-up message from the transmitting terminal and transmits the received set-up message to a call processing unit main process(202). The call processing unit main process creates a call processing unit child process and transmits the set-up message to the call processing unit child process(203). The call processing unit child process transmits the set-up message to a number transmitting unit(204). The number transmitting unit decides whether the set-up message is a self-station call or a repeating call(205). If the set-up message is a repeating call, a result message of the repeating call is transmitted to the call processing unit child process(206). The call processing unit child process transmits the set-up message to a repeating call processor(207). Another exchanger performs a call processing using a receiving terminal(208). If the set-up message is the self-station call, a result message of the self-station call is transmitted to the call processing unit child process(209). The call processing unit child process sets a flag thereof as a true(210). The call processing unit child process demands a VPI/VCI resource allocation to a resource managing unit(211). The resource managing unit allocates the VPI/VCI resource for transmitting/receiving an ATM cell(212). The call processing unit child process sets a flag for confirming an allocation of transmitting/receiving resource(213). The call processing unit child process transmits the set-up message to a receiving port(214). The receiving port transmits the set-up message to the receiving terminal(215). The call processing unit child process receives a connection message responded to the set-up message and transmits the connection message to the transmitting port.

Description

How to set up a call in an asynchronous transfer mode switch {METHOD FOR FIXING CALL IN A ASYNCHRONOUS TRANSFER MODE EXCHANGE}

The present invention relates to a call establishment method of an asynchronous transfer mode (hereinafter, referred to as ATM) exchange. In particular, in the case of a local call, a call for processing one call using one child process. It is about setting method.

Typically, a call processing structure in an ATM exchange system creates an originating child process and a called child process in the main process to process one call requested from an originating terminal, and then generates the originating / receiving side. Set up a call using the child process.

That is, in the ATM switch, a tag (Virtual Path Identification: hereinafter abbreviated as VPI) and a virtual channel identifier for distinguishing a relay line from a header of one call information requested from an originating terminal. (Virtual Path Identification: hereinafter abbreviated as VCI) to determine whether it is a local call or a foreign call, so that the call is set to the corresponding destination terminal.In this way, the VPI and VCI resources are first identified to distinguish the relay line. And then, the called number is set to the corresponding called terminal through number translation for the called number.

As described above, in order to perform call setup to the destination terminal, in the conventional ATM exchanger, the originating child process and the destination child process must be generated in the main processor, and this is not only a time and memory required to generate the child process, but also a process between processes. There is a problem that the IPC path is increased to inhibit call processing performance.

Accordingly, the present invention has been made to solve the above-mentioned problems, and its purpose is to process a call requested from an originating terminal by using one call processor_child process, and perform number translation on the call first. Therefore, the present invention provides a method for setting up a call in an ATM switcher so that a call can be handled by a called terminal by referring to a VPI / VCI resource only for a local call.

In order to achieve the above object, a call setup method of an ATM switch includes: a first step of receiving a setup message from an originating terminal and generating a call processor_child process to process the received setup message; A second step of controlling the number translation by transmitting a setup message to the number translation unit from the generated call processor _child process; A third step of, if the setup message is a local call, sets a flag of the call processor _child process and requests VPI / VCI resource allocation to the resource manager; A fourth step of allocating the VPI / VCI resources according to the VPI / VCI resource allocation request and transmitting them to the call processor_child process; And setting a flag for confirming whether the VPI / VCI resource received from the resource management unit has been allocated, referring to the set flag, transmitting a setup message to the called terminal, and receiving a connection message corresponding to the setup message from the called terminal. And a fifth process of setting up a call between called terminals.

1 is a block diagram for performing a call setup method of an asynchronous transmission mode switch according to the present invention;

2 is a detailed flowchart illustrating a call setup method of an asynchronous transmission mode switch according to the present invention.

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

10: ATM Switch 11: Outgoing Port

12: call processor_main process 13: call processor_child process

14: Resource Management Department 15: Number Translation Department

16: incoming port 17: relay call process

A: calling terminal B: called terminal

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

1 is a block diagram for performing a call setup method of an ATM switch according to an embodiment of the present invention, and includes caller / receiver terminals A and B, and sets up a call between the caller / receiver terminals A and B. An ATM switch 10 for switching.

The ATM switch 10 is a block for controlling the call path between the calling / receiving terminals A and B. The ATM switch 10 includes an originating port 11, a call processing unit_main process 12, and a call processing unit-child. A child process 13, a resource management unit 14, a number translation unit 15, a destination port 16, and a relay call process 17 are provided.

The originating port 11 receives the setup message corresponding to the call connection request received from the originating terminal A and transmits it to the call processor _main process 12. The originating port 11 also receives a connection message from the call processor _child process 13 and transmits it to the originating terminal A. FIG.

The call processor _ main process 12 receives a setup message from the originating port 11 and generates a call processor _child process 13 for processing one call, and then generates the call processor _child process 13. Send a setup message to

The call processor _child process 13 receives the setup message from the call processor _main process 12, and then transmits the received setup message to the number translation unit 15 for analyzing the received setup message. When the analysis result message received from the local call is set, the flag of the call processor _child process 13 is set to true. On the other hand, when the analysis result message received from the number translation unit 15 is a relay call, the setup message is transmitted to the relay call process 17.

In addition, the call processing unit _child process 13 makes a VPI / VCI resource allocation request to the resource management unit 14 to allocate the originating / receiving side VPI / VCI resources, and again receives the VPI / VCI received from the resource management unit 14. In response to the resource, a flag for checking whether an originating / receiving side VPI / VCI resource is allocated is set. Thereafter, the call processor _child process 13 transmits a setup message to the destination port 16, receives a connection message corresponding to the setup message from the destination port 16 again, and then connects the connection message to the originating port 11. At the same time, the connection information is set to the originating / receiving ports 11 and 16, and a flag for confirming whether the connection information is set is set.

The number translation unit 15 analyzes whether the setup message received from the call processing unit _child process 13 is a local call or a relay call and transmits the message to the call processing unit _child process 13.

The resource manager 14 allocates the originating / receiving side VPI / VCI resources according to the VPI / VCI resource allocation request received from the call processor _child process 13 and allocates the allocated VPI / VCI resources to the call processor _child process ( To 13).

The destination port 16 transmits the setup message received from the call processor _child process 13 to the destination terminal B, receives a connect message from the destination terminal B again, and receives the received connection message. Is transmitted to the call processor _child process 13.

The relay call process 17 transmits the setup message received from the call processor _child process 13 to the other exchange C to set up the relay call.

With reference to the flowchart of FIG. 2, the call setup method of the ATM switch machine according to the present invention having the above-described configuration will be described in detail.

First, the calling terminal A dials the telephone number of the called terminal B in order to make a call connection with the called terminal B which it wants to call, and sends a setup message corresponding to the call connection request according to the dialing. Send to port 11 (step 201).

The originating port 11 receives the setup message from the originating terminal A and sends the received setup message to the call processor _main process 12 (step 202).

The call processor _ main process 12 generates a call processor _child process 13 to set up a call to the destination terminal B in response to the setup message received from the originating port 11, and then generates the call processor _ The setup message is sent to the child process 13 (step 203).

The call processor child process 13 generated by the call processor main process 12 transmits the setup message to the number translation unit 15 to analyze the setup message received from the originating port 11 (step 204). ).

The number translation unit 15 analyzes the setup message received from the call processing unit _child process 13 to determine whether it is a local call or a relay call (step 205).

If the setup message in the determination step is a relay call, a result message called a relay call is transmitted to the call processor _child process 13 (step 206).

If the result message received from the number translation unit 15 is a relay call, the call processing unit _child process 13 transmits a setup message to the relay call process 17 for transmission to the other exchange C (step 207). .

The relay call process 17 transmits a setup message received from the call processor _child process 13 to the other exchange C for relay call processing, and then the other exchange C internally corresponds to the relay call. Call processing is performed to the destination terminal D (step 208).

If the setup message is the local call in the determination step, a result message of the local call is transmitted to the call processor _child process 13 (step 209).

The call processing unit _child process 13 may process as a process when the result message received from the number translation unit 15 is a local call. The call processing unit _child process 13 sets a flag of the call processing unit _child process 13. Set to true (step 210).

After the flag of the call processor _child process 13 is set to true, the call processor _child process 13 sends to the resource manager 14 to allocate the calling / called party VPI / VCI resources. A VPI / VCI resource allocation request is made (step 211).

The resource manager 14 receives the VPI / VCI resource allocation request from the call processor _child process 13, and then allocates the VPI / VCI resource for the ATM cell to be transmitted / received to the originating / receiving party, and allocates the allocated VPI. The / VCI resource is sent to the call processor _child process 13 (step 212).

The call processor _child process 13 receives the VPI / VCI resource from the resource manager 14 and checks whether the calling / called party VPI / VCI resource is allocated to release the call between the calling / called terminals A and B. A flag to be set is set (step 213).

Thereafter, the call processor _child process 13 transmits a setup message to the destination port 16 with reference to the set flag (step 214), and the destination port 16 receives the call from the call processor _child process 13. The received setup message is sent to the destination terminal B (step 215).

The destination port 16 receives a connection message (hook off signal of the destination terminal B) corresponding to the setup message from the destination terminal B, and receives the received connection message. Transfer to child process 13 (step 216).

The call processor _child process 13 receives the connection message corresponding to the setup message from the destination port 16, and then transmits the connection message to the originating port 11 and simultaneously to the originating / receiving port 11, 16. The connection information is set, and a flag for checking whether the connection information is set is set (step 217).

The originating port 11 transmits the connection message received from the call processor _child process 13 to the originating terminal A, whereby call setup between the originating and terminating terminals A and B is completed (step 218).

Therefore, in the case of setting up a local call of an ATM exchanger, in order to improve call processing performance, in the case of a local call, two processes (the calling party caller_child process and the called party caller_child process) are generated. It is reduced to (call processing unit _child process 13) to enable call setup between calling / receiving terminals A and B.

As described above, the present invention is to process a call requested from an originating terminal using a single call processor _child process, and performs a number translation on the call first to refer to the VPI / VCI resource only when it is a native call. Therefore, by processing the call to the called terminal, the system load can be reduced, and the number of processes and the process path between processes can be reduced, thereby improving the performance of the call processing block.

Claims (2)

The asynchronous transfer mode switch which includes a call processing unit_main process, a call processing unit_child process, a resource management unit, a number translation unit, and a relay call process, controls call settings between originating and receiving terminals. In A first step of receiving a setup message from the originating terminal and generating a call processor_child process to process the received setup message; A second process of controlling the number translation by transmitting the setup message to the number translation unit in the generated call processor _child process; As a result of the number translation, when the setup message is a local call, after setting a flag of a call processor_child process to perform call setup with one call processor_child process in the asynchronous transmission mode switch, the resource manager Requesting a virtual path identifier / virtual channel identifier (VPI / VCI) resource allocation to the third process; A fourth process of allocating VPI / VCI resources according to the VPI / VCI resource allocation request and transmitting the VPI / VCI resources to the call processor _child process; And In response to confirming that the VPI / VCI resources received from the resource management unit are allocated, call release is performed between the calling / calling terminals to set a flag, and with reference to the set flag, a setup message is transmitted to the called terminal. And a fifth process of receiving a connection message corresponding to a setup message from a called terminal and setting up a call between the calling / called terminals. The method of claim 1, If the setup message is a relay call, sending the setup message to the relay call process for transmission to another exchange; And transmitting the setup message received from the call processor _child process to another switch to perform call processing in the relay call process. .