KR100222410B1 - Method of multi-datalink access in exchange - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

The present invention relates to a method for connecting multiple data links when transmitting and receiving data through a public data communication network in an electronic exchange.

I. The technical problem to be solved by the invention

It is installed by connecting a complex data link that accommodates a variety of application layers, and by not configuring a dedicated line, application layer, and protocol processing layer separately for each purpose whenever a data processing function request for various uses occurs. Help reduce costs

All. Summary of Solution of the Invention

In order to transmit / receive data from a plurality of upper application layer units, a circuit setting is requested using a plurality of XNET values provided by the routing information processing layer unit. The link is provided to the upper application layer unit to transmit and receive data between the plurality of higher application layer units and the plurality of matching devices connected to the public data communication network.

la. Important uses of the invention

Applicable to switching system with data link function.

Description

Multiple Data Link Connection Method of Switching System

The present invention relates to a multiple data link connection method of an electronic exchange, and more particularly, to a method of connecting multiple data links when transmitting and receiving data through a public data communication network.

In general, an electronic exchange using a public data communication network has a generalized protocol system to connect a protocol processing layer connected to a private line to a public data communication network, and defines a generalized interface protocol between the application layer and the protocol processing layer to define various application layers. Design with a structure that can communicate with.

1 is a connection diagram illustrating a data link management scheme of a general leased line concept.

The block supporting the upper application layer and the protocol is implemented to transmit and receive data through the promised communication system in the system, and the protocol processing layer takes the form of one-to-one using a permanent virtual line or a dedicated line. It is a structure in which application layer and protocol processing layer are closely related. Since there is no need for another path between the application layer and the protocol processing layer, one-to-one (1: 1) data can be exchanged, and data can be transmitted and received without any other overhead. The 1: 1 link access method may transmit and receive data between both protocol protocol layers if only a physical data link is connected without a separate path setting procedure. Therefore, it is effective to use this structure when used as a data link for a sole purpose. However, the data transmission / reception function using a 1: 1 link connection is mostly applied to a general computer system using a public data network (PSPDN), and a public communication network mainly uses data transmission through a dedicated line using its own network. . As public telecommunication networks are diversified and complicated, they need data processing functions for various purposes such as data management, centralization of charging, and remote control functions. Accordingly, a dedicated line, an application layer, a protocol processing layer, etc. should be separately configured for each use, and there is a problem in that an additional installation cost increases whenever a new processing function request is generated. In other words, the requirements of various applications can not be flexibly accommodated, there is a considerable additional installation cost, and there is an inconvenience in that maintenance is not easy due to the close inter-layer relationship.

Accordingly, an object of the present invention is to provide a multiple data link access method for connecting a complex data link accommodating various application layers for solving the above problems.

Another object of the present invention is not to separately configure a dedicated line, an application layer, a protocol processing layer, etc. for each use whenever a data processing function request for various uses is generated, thereby enabling multiple data link connections to reduce additional installation costs. In providing a method.

It is another object of the present invention to provide a multiple data link connection method that is easy to maintain.

In order to achieve the above object, the present invention provides a virtual line setting in a protocol processing layer unit by requesting a circuit setting using a plurality of XNET values provided by a routing information processing layer unit in order to transmit and receive data in a plurality of higher application layer units. In this case, by providing information on the open communication port to the upper application layer unit is characterized in that the link is connected to transmit and receive data between a plurality of higher application layer units and a plurality of matching devices connected to the public data communication network, respectively. .

1 is a connection diagram for a data link management scheme of a general leased line concept

2 is a block diagram of an electronic switching system having a multiple data link function according to an embodiment of the present invention.

Figure 3 is a network diagram using the XNET value according to an embodiment of the present invention

4 is a structural diagram linking a data structure and associated information according to an embodiment of the present invention;

5 is a diagram illustrating a procedure for connecting a virtual line using XNET according to an embodiment of the present invention.

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

2 is a configuration diagram of an electronic switching system having a multi-data link function according to an embodiment of the present invention, the protocol processing layer 10 is a public data network matching module X.25, TCP / IP (Transsmision Control Protocol / Iternet Protocal) It performs the function of matching the electronic exchange to the public network and transmitting / receiving data transmitted from the upper layer via the network. The routing information and status processing layer unit 12 is an operation and maintenance function module that manages the information of the matching devices connected through each data link, and establishes and releases virtual lines with the matching devices that need to communicate with each application layer unit. Performs the function of. Subscriber and relay line matching module 14 processes outgoing and incoming calls of subscribers, and processes outgoing and incoming calls that are processed through the relay line. Station number analysis and relay routing module 16 analyzes the station number and provides routing related information. The billing information collection module 18 collects and provides billing information according to data transmission and reception. The statistical information collecting module 20 collects and provides various statistical information.

3 is a diagram illustrating a network using XNET values according to an embodiment of the present invention.

The network is configured to transmit and receive information generated in one electronic exchange with one or more external matching devices as one-to-one (1: 1).

The application layer can use a virtual line or a permanent virtual line using only XNET values, and can transmit and receive data through this line. Each application layer unit can open a data link port using a kit value of XNET and use this virtual line as if it is a dedicated line. Thus, as long as the XNET kit value allows, the data link port can be opened between many application layer units and external matching devices. At this time, the port opened by using XNET is matched one-to-one (1: 1) based on the number assigned from the network to prevent access from inside to the electronic exchange. Each application layer unit requests a line setting using the XNET value provided by the routing information and state information processing layer unit 12 to transmit and receive data. When the virtual line is successfully established in the protocol processing layer 10, information on the open communication port is provided to the application layer. From this point, the application layer unit can transmit data with the external matching device. The routing information and state information processing layer unit 12 performs a function of managing information about XNET. This layer establishes a database for each XNET value to generate, accumulate, delete, and output information for accessing the network, and establishes a virtual line through internal communication with the protocol processing layer unit 10. do. In addition, it monitors the status of the established virtual line and performs the function of re-establishing the circuit when the circuit is restored due to a failure. In addition, it monitors the status of the established virtual line and performs the function of re-establishing the circuit when the circuit is restored due to a failure. The database stores information and status of the physical link of the data link, network identification information of the external matching device logically, and stores an identifier that can distinguish each application layer in the exchange. It consists of parts that store and manage protocol data, and each part consists of a structure that links related information.

4 is a structural diagram linking a data structure and associated information according to an embodiment of the present invention.

R_USER_BLK_TBL is a database defined in a specific application layer. USER BLOCK designates and stores XNET values according to specific purposes. The application layer unit requests the virtual line connection to the routing information and state information processing layer unit 12 using this XNET value.

R_XRTG_INF contains general information about XNET, and when a line connection request is received, the routing information and status information processing layer unit 12 transfers the information stored in this relation to the protocol processing layer unit 10 to establish a virtual line. Do it.

R_XLNK_INF is a relation that manages information about a physical data link. When attempting a virtual line connection, the line connection is made only when the physical link is in a normal state. Otherwise, the line connection fails.

R_XMOD_INF defines the mode used in each system or project of each country as a mode to verify when registering XNET and to accurately distinguish the purpose of each XNET.

5 is a diagram illustrating a procedure for connecting a virtual line using XNET according to an embodiment of the present invention.

The protocol processing layer unit 10 receives the line connection command, connects the virtual line according to its own protocol processing procedure, and notifies the upper application layer unit of the result of the connection success. Thereafter, data transmission and reception is performed directly with the upper application layer unit. The routing information and state processing layer unit 12 receives the line connection request of the application layer unit, checks the link state, determines whether the virtual line connection is possible, collects XNET-related information, and instructs the protocol processing layer unit 10 to connect the line. . At this time, even if a circuit connection request is received by various application layer units with reference to the data structure shown in FIG. 4, data links independent of each other can be provided to each application layer unit. In addition, even if the upper layer does not know the internal structure of the protocol processing layer 10, if only a few internal communication modes are defined, the network can be easily accessed, thereby providing a simple interface and providing various data links as communication ports. . Even if the upper layer part is composed of several blocks, each block may independently request a virtual line connection to receive one independent line and transmit and receive data.

As described above, since the present invention transmits and receives data using a public data communication network, additional installation costs for data link installation can be reduced, and the electronic exchange becomes a subscriber of the public data communication network and forms a separate network by itself. Since it is possible to send and receive various information, there is an advantage that can use the additional service provided by the public communication network.

Claims (2)

In the multiple data link connection method in a switching system in which a protocol processing layer unit is connected to a public data communication network and a plurality of external matching devices are connected to the public data communication network, In order to transmit / receive data from a plurality of upper application layer units, a circuit setting is requested using a plurality of XNET values provided by the routing information processing layer unit. A link provided to the upper application layer unit to connect a link to transmit and receive data between the plurality of higher application layer units and the plurality of external matching devices connected to the public data communication network, respectively. Way. A plurality of higher application layer units for requesting line setting using the XNET value provided by the routing information and state information processing layer unit to transmit and receive data, to open a data link port, and to use this virtual line as a dedicated line; When connected to a public data communication network and successfully established the virtual line, a protocol processing layer unit for providing information on an open communication port to the plurality of upper application layer units and a database for each XNET value to access a network And a routing information and a status information processing layer to perform the function of creating, accumulating, deleting, and outputting the information, and establishing a virtual line through the internal communication with the protocol processing layer 10. In the multiple data link connection method, Making a line connection request according to an XNET key value from the upper application layer unit to the routing information and state processing layer unit; Sending a circuit connection command to the protocol processing layer unit when the link state is normal by checking the corresponding link state in the routing information and the state processing layer unit when there is a line connection request from the upper application layer unit; When receiving the line connection command from the routing information and the state processing layer unit, the protocol processing layer unit proceeds with the virtual line connection execution protocol procedure and notifies the upper layer application layer unit of the virtual connection result to the application layer unit and the external matching device. Multiple data link connection method of a switching system, characterized in that the process of performing data transmission and reception.

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