KR980013468A - Device and method for transmitting information between exchanger and remote center - Google Patents

Abstract

And performs data communication with a center that processes data of other protocol type remote from the exchange.

To this end, in the embodiment of the present invention, when data is communicated between a center that is remote from the exchange and processes information of the exchange using a protocol different from the exchange, the interface function of the center standard is implemented inside the exchange, The internal communication protocol and the function of mutual conversion and transmission are added, so that exchanges which are installed and operated locally can mutually transfer information to each other or a centralized center.

Description

Device and method for transmitting information between exchanger and remote center

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transmitting information in an exchange, and more particularly, to a method of transmitting information between an exchange and a remotely located operation / maintenance and charging center.

Usually, the exchanger performs the exchange function by sharing the respective functions in the distributed control manner. The switch of the above and the distributed control scheme includes a subscriber subsystem that performs an interface function with a subscriber side, a subscriber subsystem that performs an interface function with the subscriber side, a switch subsystem that performs a switch function, And an operation and maintenance subsystem that performs functions.

The operation and maintenance subsystem services MMC (Man-Machine Communication) functions between billing information processing and operator exchanges. However, the conventional exchanger did not have an interface for transmitting information to a remote charging center when processing billing information. Therefore, the billing information was transferred to a magnetic tape, stored, and then transported. In the case of operation / maintenance / management information, each terminal has a separate terminal for each switching system using asynchronous communication, and the MMC function is performed through the terminal.

However, in the case of using the operation and maintenance and charging method as described above, various information generated during the operation of the exchange and information for controlling the exchange are collected and transmitted locally so that they can be managed remotely or integrated on-line And it is difficult to control. Accordingly, it is necessary to provide a service for the subscribers because the exchange personnel installed and distributed locally are required to have the manpower and equipment, the information to be shared among the exchangers is not transmitted in real time, There was a problem that was not possible.

It is therefore an object of the present invention to provide a method by which an exchange can communicate information with remote operation / maintenance and billing centers.

It is another object of the present invention to provide a method and system for managing and maintaining an exchange in which the operation and maintenance subsystem of an exchange has an X.25 interface and the operation is performed by a maintenance subsystem, Exchange information and control information to each other.

In order to accomplish the objects of the present invention, there is provided a method for transmitting different protocol information between centers and a center for processing information of the exchanges via a data communication network, comprising the steps of: And establishing a data path between the center and the exchange in response to the exchange, and after the call is established, converting into a protocol type of the opposite station through a data path established between the exchange and the center, and performing bidirectional data communication And canceling the data path and releasing the call when the call release occurs during the data communication.

1 is a flowchart showing a network connection relationship between an exchange and an operation / maintenance and charging center

2 is a diagram illustrating a protocol layer of an exchange for transferring information between a remotely located operation / maintenance and charging center in accordance with an embodiment of the present invention;

3 is a block diagram of a software block of an exchange for transferring information between a remotely located operation / maintenance and billing center in accordance with an embodiment of the present invention

4 is a flowchart illustrating a process for processing a call and transferring information in an exchange according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a network connection relationship between switches connected to a Public Switched Data Network (PSDN) through a DSU / CSU and a central operation / maintenance and charging center. Herein, the operation / maintenance and charging center is referred to as a center. It is assumed that the exchanges distributed to the center are connected through the PSDN network, the PSDN transmits data in the X.25 protocol as a packet switched network, and the exchange transmits data in the IPC protocol. The exchange includes a protocol conversion device embedded in a module form. In the exchange according to the embodiment of the present invention, the apparatus for performing the function of the protocol conversion apparatus may be an operation and maintenance subsystem.

Referring to FIG. 1, the protocol conversion apparatus is connected to an operation / maintenance and charging center located at a remote location through an X.25 interface. The transmission line uses a DSU / CSU or a dedicated line modem and can be connected using a dedicated line or a packet network. In addition, the protocol conversion apparatus is connected to a module responsible for operation / maintenance and accounting as an information transmission protocol between internal modules of an exchange, and transmits mutual information. The contents of the information include all the information of the exchange except for the subscriber service such as operation / maintenance information and billing information by defining a module for exchanging information and a corresponding module of the corresponding module of the center for mutual transmission . That is, the information transmission apparatus is a broad system for connecting a remote computer, not for a specific service.

The protocol conversion apparatus always operates in the server, and when an X.25 method call is attempted at the center, a subaddress is extracted from an X.25 called address, It is responsible for connecting the module of the designated exchange according to the value, transmitting the information to be transferred, and releasing the connection when there is a connection release request from one of the two sides.

2 is a diagram showing a protocol layer of an information transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 2, an exchange and a center protocol transmission apparatus according to an embodiment of the present invention are configured in three ways. There is an X.25 protocol stack 230 connected to the PSDN for interfacing the central information with the exchange, and second, an exchange protocol stack unit 210 for interfacing the information with the internal module And a protocol conversion unit 220 which is located inside the exchange and converts the information of the X.25 protocol stack unit 230 and the exchange protocol stack unit 210 into a protocol type of the relative protocol stack unit and transmits the protocol type.

The X.25 protocol stack unit 230 uses an RS-232 or V.35 standard as a physical layer, an LAPB as a data link layer, and an X.25 PLP as a network layer. Also, the exchange protocol stack unit 210 may vary according to a transmission protocol. In the embodiment of the present invention, it is assumed that the exchange protocol is an IPC (Inter Processor Communication) method. Then, the exchange protocol stack unit 210 uses the RS-422 or RS-485 standard as the physical layer and configures the IPC processing layer in the upper layer. Between the two stack units 210 and 230, there is a protocol conversion unit 220 serving as an application layer, which handles call processing and information transfer of mutually different protocols.

FIG. 3 is a diagram showing a software block configuration of an information transmission apparatus according to an embodiment of the present invention, which is divided into functions. In the embodiment of the present invention, the information transfer protocol of the exchange is assumed to be the IPC scheme as described above.

Referring to FIG. 3, protocol stacks 321, 331, and 341 for connecting different protocols when transmitting information should be provided. The call processing unit 310 carries out call processing and route assignment functions that are not dependent on any one protocol considering different call connection and release methods of various protocols. The protocol stack units 321, 331, and 341 include interface units 322, 332, and 342 for buffering processing between the call processing and the data transfer method. It takes into consideration the addition of a new protocol. If there is a request for acceptance of a new protocol, the corresponding protocol stack section may be implemented, and the interface section may be implemented above the protocol stack section.

4 shows a flow diagram illustrating the operation of communicating information with a call center and a remotely located center in an exchange in accordance with an embodiment of the present invention. FIG. 4 shows a flow of a call connection, a data transmission, and a call release operation.

3 and 4, a data transfer operation between an exchange that processes data in different protocol schemes and a remote remote center according to an embodiment of the present invention will be described. In the embodiment of the present invention, it is assumed that the center tries to connect and release a call.

First, we examine the operation of call connection. When the X.25 protocol stack unit 331 receives the X.25 call request packet, the call request message is output to the X.25 interface unit 332 in step 411. Then, the X.25 interface unit 332 extracts the call-related information from the call request packet, converts the call-related information into an internal format, and transmits a connection request primitive (CONN_REQ primitive) to the call control unit 310 in step 412. In step 413, the call control unit 310 transmits a connection request primitive having a signal ID and a signal ID to the IPC interface unit 322 in step 413. The call control unit 310 also generates a data path for directly connecting the X.25 interface unit 332 and the IPC interface unit 322. Then, the IPC interface unit 322 converts the connection request primitive into an IPC connection request signal and transmits the IPC connection request signal to the IPC protocol stack unit 321 in step 414.

The IPC protocol stack unit 321 receiving the IPC connection request signal transfers an IPC connection response signal to the IPC interface unit 322 in step 421, and the IPC interface unit 322 transmits a connection response signal to the call control unit 310. Then, the call control unit 310 outputs a connection response message to the X.25 interface unit 332, and the X.25 interface unit 322 generates a packet related to call accept of the X.25 protocol type, 25 protocol stack unit 331, respectively.

When the above operation is performed, the call connection between the remote center and the exchange is completed, and then the data is transferred between the exchange and the center. At this time, data is directly transmitted through the data path established between the X.25 interface unit 332 and the IPC interface unit 332 as in steps 431 to 433 and 441 to 443. The interface units 332 and 322 extract only a pure data area from the data received from the counterpart and transmit the data to the counterpart protocol interface unit through the generated data path, And transmits it.

Upon completion of the data transmission operation as described above, an operation of releasing the set call is performed. The release of the call can be requested in any direction of both directions, and in the embodiment of the present invention, a case where a request is made by the center using the X.25 protocol as described above will be described.

When the X.25 protocol stack unit 331 receives an X.25 call clear request packet from the mobile station, the X.25 protocol stack unit 331 transmits the call clear request packet to the X.25 interface unit 332 in step 451. Then, the X.25 interface unit 332 extracts necessary information from the call release request packet, converts the extracted information into a disconnection request primitive (DISC_REQ), and transmits the disconnection request primitive to the call control unit 310. The X.25 interface unit 332 transmits the clearing request primitive to the call control unit 310 and then transmits a clear confirm packet to the X.25 protocol stack unit 331 to transmit the call path of the center Release.

In step 453, the call control unit 310 adds the signal ID and the contents related to the call release to the request primitive, and transmits the signal ID and the content to the IPC interface unit 322, thereby destroying the data path formed between the two interface units 332 and 322 . Then, the IPC interface unit 322 converts the call release request signal transmitted from the call control unit 310 into a call release request of the IPC protocol, and then transmits the call release request to the IPC protocol stack unit 321 in step 454. After receiving the call disconnection request IPC signal, the IPC protocol stack unit 321 transmits a response IPC signal to the IPC interface unit 322.

As described above, exchanges that are distributed and operated locally can be connected to a center located at a remote location to share various information, thereby adding various online-type supplementary services. In addition, the internal structure of the system facilitates modularization, and it is easy to implement a new protocol matching.

Claims (6)

An exchange protocol processor for exchanging information according to an internal information transmission protocol, and an exchange protocol processor for exchanging information between the exchange protocol processor and the data communication network And an X.25 protocol processing unit for transmitting information of the X.25 protocol type to the center, wherein the X.25 protocol processing unit transmits the X.25 protocol type information to the center, And transmits different protocol data to the remote center. The apparatus of claim 1, wherein the exchange processes data in the form of an IPC protocol. A method for transmitting different protocol information between exchanges and a center for processing information of the exchanges via a data communication network, the method comprising the steps of: converting a protocol type of the exchange into a protocol type of the exchange upon occurrence of a call request packet at the center, The method comprising: a call establishing step of establishing a data path between the center and the exchange at the time of establishing the call; And canceling the established data path and releasing the call when the call release occurs. The method of claim 3, wherein the call setup process comprises: extracting call related information when a call request packet is received by the center interface unit and delivering a connection request primitive to the call control unit; Transmitting a connection request primitive having a signal ID and a signal content to an exchange interface unit, converting the connection request primitive into an exchange protocol form upon reception of the connection request primitive, Transmitting a connection response primitive to the center interface unit when the call control unit receives a connection response signal and setting a data path between the center and the exchange interface unit; This process consists of transferring call acceptance data. The data transmission method between the exchange and the center as claimed. 5. The method of claim 4, wherein the call release process comprises: extracting call release related information upon a call release request and delivering the call release related information to the call control unit; and adding the signal ID and contents to the received call release related information Transmitting data to the counterpart interface and destroying the formed data path; and releasing the call formed by the call release signal received at the call control unit. 6. The method according to any one of claims 3 to 5, wherein the center uses the X.25 protocol and the exchange uses the IPC protocol. ※ Note: It is disclosed by the contents of the first application.