KR100241702B1 - Atm private net exchanger - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asynchronous transfer mode (ATM) private network switch, and more particularly, to a capacity-extended ATM private network switch for switching input / output cells by configuring a system with a multi-shelf system.

Conventional ATM private network exchanges are suitable for application to a small-sized private network. However, when the ATM private network is used for a relatively large-scale private network, the capacity of the ATM private network exchange is small.

The present invention constitutes a multi-shelf system and switches input / output cells in each shelf, so that the number of subscription lines can be easily expanded, and a large-scale private network can be efficiently constructed.

Description

Capacity-extended ATM private network switch

FIG. 1 is a block diagram of a conventional ATM private network switch.

FIG. 2 is a block diagram of a capacity expansion type ATM private network switch according to the present invention; FIG.

FIG. 3 is a detailed block diagram of the input / output matching module shown in FIG. 2;

FIG. 4 illustrates the connection of each shelf-specific switching module; FIG.

Figure 5 shows the interconnection of each self-service system / call control module;

DESCRIPTION OF THE REFERENCE NUMERALS

SF1 to SF3: Self 110: Self input / output matching module

120: non-ATM terminal matching module 130: input buffer type grating structure switching module

140: System / call control module

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asynchronous transfer mode (ATM) private network exchanger, and more particularly, to a capacity expansion type ATM private network exchanger for switching input / output cells by configuring a system with a multi-shelf system.

In general, an ATM private network switch exchanges information transmitted and received through a private network.

As shown in FIG. 1, a conventional ATM private network switch having the above functions includes a plurality of input / output matching modules 10, a plurality of non-ATM terminal matching modules 20, an input buffered grid switching module 30, Cell combining / partitioning module 40 and a system / call control module 50. [ The input / output matching modules 10R-1 to 10R-N are provided for matching the ATM terminals. The input / output matching modules 10R-1 to 10R-N receive cells applied from the receiving end Rx and process the cells in the input buffer type grid switching module 30 And outputs it to the input buffer type grid structure switching module 30 side. The non-ATM terminal matching modules 20R-1 to 20R-M are used for matching non-ATM terminals. Upon receiving the call information from the receiving terminal Rx, the non-ATM terminal matching modules 20R- 30 and outputs it to the input buffer type grid structure switching module 30 side. The input buffer type lattice-structure switching module 30 switches cells applied from the input / output matching modules 10R-1 to 10R-N and the non-ATM terminal matching modules 20R-1 to 20R-M, -1 to 10T-N) and non-ATM terminal matching modules 20T-1 to 20T-M. The input / output matching modules 10T-1 to 10T-N are provided for matching the ATM terminals. The input / output matching modules 10T-1 to 10T-N receive the cells applied from the input buffer type grid switching module 30, receive the corresponding cells, And outputs it to the transmitting end Tx side. The non-ATM terminal matching modules 20T-1 to 20T-M are used to match and supply non-ATM terminals. The non-ATM terminal matching modules 20T-1 to 20T-M receive the cells applied from the input buffer type switching module 30, And outputs it to the transmitter Tx side. In addition, the cell combining / dividing module 40 converts the signal cells received from the input / output matching modules 10R-1 to 10R-N and the non-ATM terminal matching modules 20R-1 to 20R-M into corresponding VPI ) And a VCI (Virtual Channel Identifier) to output to the system / call control module 50 in the form of a packet, divides the data applied in a packet form from the system / call control module 50 into a cell form, 1 to 10T-N and the non-ATM terminal matching modules 20R-1 to 20R-M, 20T-1 to 20T-M . The system / call control module 50 performs processing such as call control, call volume management, transmission path abnormality detection, and the like on the basis of data applied in packet form from the cell combining / division module 40, 1 to 10T-1 to 10T-N and the non-ATM terminal matching modules 20R-1 to 20R-M and 20T-1 1 to 10T-N and non-ATM terminal matching modules 20R-1 to 20R-M, respectively, for correcting the VXT included in the input / , 20T-1 to 20T-M).

Conventional ATM private network exchanges as described above can not be applied to a small-scale private network, but when the ATM private network is used for a relatively large-scale private network, the capacity of the ATM private network exchanger is small.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a capacity expansion type ATM private network exchanger for switching a plurality of input / output cells to multi- There is purpose in.

According to another aspect of the present invention, there is provided an ATM private network switch, comprising: a plurality of switching means for receiving a unit access line and switching a cell applied to a receiving terminal and outputting the switched cell through a transmitting terminal; The switching means outputs the cell that is switched and output by itself to the transmitting terminal of another self; Wherein the switching means provided in each of the shelves includes a system / call control module for receiving and processing signal cells and OAM cells and outputting information for correcting VXTs; The control unit performs a function of matching the ATM terminals and outputs the signal cell and the OAM cell to the system / call control module side by receiving the cell applied from the receiving end, And converting the data cells into a form that can be processed by a plurality of input buffer type lattice-structure switching modules based on the VXT to generate a corresponding input buffer type lattice according to the self selection information provided in the VXT, A first input / output matching module for outputting the first input / output matching module to the structure switching module; Converts the call information received from the receiver into cells capable of being processed by the input buffer type lattice-structure switching module, and outputs the applied call information to the system / call control module side And a plurality of first bits for outputting cells to the corresponding input buffer type lattice-structure switching module in accordance with the VXT self-selection information based on information applied from the system / call control module, An ATM terminal matching module; ATM terminals are matched and receive cells applied from an input buffer type lattice-structure switching module belonging to a self and a cell belonging to the self, and converts the cells into a form that can be transmitted based on the VXTs provided therein, A plurality of second input / output matching modules for outputting a plurality of input / output signals; ATM terminals, and receives cells applied from an input buffer type lattice-structure switching module belonging to a self and a cell belonging to the self, and converts the corresponding cells into a form that can transmit the cells based on the VXTs And a plurality of second non-ATM terminal matching modules outputting the same to the transmitting end.

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

As shown in FIG. 2, the ATM private network switch according to the present invention includes a plurality of cells SF1 to SF3. Each cell SF1 to SF3 includes a plurality of input / output matching modules 110, A matching module 120, a plurality of input buffer type trellis switching modules 130, and a system / call control module 140. In addition, each of the shelves SF1 to SF3 is provided with the input buffer type grid structure switching module 130 in the number corresponding to the total number of selfs. That is, as shown in FIG. 2, in the case where the total number of selfs is three, three input buffer type lattice-structure switching modules 130 are provided in each of the selfs (SF1 to SF3) Among the input buffer type grid-based switching modules, the output terminal of the input buffer type grid structure switching module 130-1 is connected to the self input / output matching modules 110T-1 to 110T- And output terminals of the input buffer type lattice-structure switching module 130-2 are connected to the input / output matching modules 110T-1 to 110T-N and other non-ATM terminal matching modules 110T-1 to 110T- And the output terminal of the input buffer type grid structure switching module 130-3 is connected to another self input / output matching module 110T-1 to 110T-N and a non- And are connected to the matching modules 120T-1 to 120T-M. Therefore, each of the shelves SF1 to SF3 can not only output the cell inputted to its own receiving end Rx to the transmitting end Tx of its own but also output it to the transmitting end Tx of the other self, So that the number of lines accommodated can be increased.

The input / output matching modules 110R-1 to 110R-N perform functions of matching ATM terminals, receive cells applied from the receiving end Rx, VCI Translation Table (VPI / VCI Translation Table) provided in the system / call control module 140 based on the information applied from the system / call control module 140, VCI conversion table) and converts the corresponding data cell into a form that can be processed by the input buffer type lattice structure switching modules 130-1 to 130-3 based on the corresponding VXT to form an input buffer type lattice structure switching module 130-1 to 130-3, and outputs the corresponding cells to the corresponding input buffer type lattice-structure switching modules 130-1 to 130-3 according to the salad selection information provided in the VXT. The non-ATM terminal matching modules 120R-1 to 120R-M perform a function of matching non-ATM terminals and input call information received from the receiving terminal Rx into an input buffer type lattice structure switching module 130-1 to 130-3, and outputs the converted cells to the input buffer type lattice-structure switching modules 130-1 to 130-3. The system / And controls the VXT included in itself based on the information applied from the system / call control module 140 and outputs the corresponding input buffer type lattice structure switching modules 130-1 to 130- 3) side. The input buffer type grid structure switching module 130-2 switches cells applied from the input / output matching modules 110R-1 to 110R-N and the non-ATM terminal matching modules 120R-1 to 120R-M, 1 to 110T-N and the non-ATM terminal matching modules 120T-1 to 120T-M, and the input buffer type lattice-structure switching module 130-3 outputs the input / output matching matched modules 110T- The input / output matching modules 110T-1 to 110T-N, which belong to other shelves by switching the cells applied from the modules 110R-1 to 110R-N and the non-ATM terminal matching modules 120R-1 to 120R- And the non-ATM terminal matching modules 120T-1 to 120T-M, and the input buffer type grating switching module 130-3 is connected to the input / output matching modules 110R-1 to 110R- 1 through 120T-N and non-ATM terminal matching modules 120T-1 through 120T-M that belong to another self, ) Side . In addition, the input / output matching modules 110T-1 to 110T-N match the ATM terminals and receive input signals from the self-contained input buffer type lattice-structure switching modules 130-1 to 130-3 And converts the cell into a form that can be transmitted on the basis of the VXT provided in itself and outputs it to the transmitter Tx side. The non-ATM terminal matching modules 120T-1 to 120T-M match the non-ATM terminals and receive input from the self-contained input buffer type grid switching modules 130-1 to 130-3 And converts the cell into a form that can be transmitted based on the VXT included in itself, and outputs it to the transmitting end Tx side. The system / call control module 140 receives and processes signal cells and OAM cells from the input / output matching modules 110R-1 to 110R-N to correct VXT of the input / output matching modules 110R-1 to 110R-N And outputs the information to the input / output matching modules 110R-1 to 110R-N to perform the call control operation, receives the signal information from the non-ATM terminal matching modules 120R-1 to 120R-M, Performs call control operations by outputting information for correcting the VXT of the matching modules 120R-1 to 120R-M, and manages call volume.

2, the input / output matching module 110 is divided into a receiving unit Rx and a transmitting unit Tx. However, in practice, the input / output matching module 110R and the input / output matching module 110T are connected to one device As shown in FIG. 3, the input / output matching module 110 includes an interface 111, an input processor 112, an output processor 113, a CPU 114, a FIFO 115 First-Out, a dual-port RAM 116, and a serial input / output unit 117. The interface unit 111 performs a function of interfacing a line and receives a cell applied from the receiving end Rx and outputs the cell to the input processing unit 112 and transmits the cell applied from the output processing unit 113 to the transmitting end Tx side . The input processing unit 112 receives the cell applied from the interface unit 111 and extracts the signal cell and the OAM cell in the header of the corresponding cell and outputs the signal cell and the OAM cell to the CPU 114 through the FIFO 115, And outputs the data cell to the input buffer type grid structure switching modules 130-1 to 130-3 corresponding to the VXT based on the self selection information of the VXT. The input FIFO state switching module 130-1 to 130-3 receives the input FIFO state signal and the cell start signal applied from the I / O type switching modules 130-1 to 130-3, And outputs the data cells to the input buffer type grid structure switching modules 130-1 to 130-3 via the input data bus. The output processing unit 113 receives the data cells applied from the input buffer type grid switching modules 130-1 to 130-3 and inserts the header information based on the VXT provided therein to make the cells transmittable, 111), and receives an output FIFO state signal from the input buffer type lattice-structure switching modules 130-1 to 130-3 and outputs it to the input buffer type lattice-structure switching modules 130-1 to 130-3 Outputs a FIFO selection signal, and receives and outputs the data cells input through the output data bus from the input buffer type grid structure switching modules 130-1 to 130-3. The CPU 114 reads the signal cell and the OAM cell applied through the FIFO 115 from the input processing unit 112 and outputs the packet to the system / call control module 140 through the dual port RAM 116 , Reads information applied in a packet form from the system / call control module 140 through the dual port RAM 116 and outputs the information to the input processing unit 112 and the output processing unit 113 to thereby process the input processing unit 112 and the output processing unit 113, and inputs / outputs information through the serial input / output unit 117 to display a call connection status on a monitor (not shown in the figure).

An output terminal of the input buffer type lattice-structure switching module 130 provided in each of the shelves SF1 to SF3 is connected as shown in FIG. 4. In FIG. 4, an input terminal The connection of the output stages of the buffer type grid structure switching modules 130-1 to 130-3 is shown. That is, the input buffer type trellis switching modules 130-1 to 130-3 include a plurality of input FIFOs 131, a switching chip 132, and a plurality of output FIFOs 133, The structure switching module 130-1 is connected to the input / output matching modules 110R-1 to 110R-N of the self SF1 and the non-ATM terminal matching modules 120R-1 to 120R- the input and output port matching module (110T-1~110T-N) and the ratio of its self (SF1) to be output to the transmitting end (Tx) and the switching of the cells received from the _(N P1~P) itself self (SF1) And the input buffer type lattice-structure switching module 130-2 outputs to the ATM terminal matching modules 120T-1 to 120T-M the I / O matching modules 110R-1 to 110R -N) and the non-ATM terminal matching module (120R-1~120R-M) to the switching the cells input from the plurality of ports (P1~P _N) connected to be outputted to the transmission terminal (Tx) of the self (SF2) Self-Self (SF2) input and output To the modules 110T-1 to 110T-N and the non-ATM terminal matching modules 120T-1 to 120T-M, and the input buffer type grid structure switching module 130-3 outputs the self- N input from the plurality of ports P1 to P _N connected to the input / output matching modules 110R-1 to 110R-N and the non-ATM terminal matching modules 120R-1 to 120R- Output modules 110T-1 to 110T-N and the non-ATM terminal matching modules 120T-1 to 120T-M so as to be output to the transmission terminal Tx of the non-ATM SF3 . On the other hand, the input buffer type lattice-structure switching modules 130-1 to 130-3 provided in the shelves SF2 and SF3 are also connected to the self-transmitting terminal Tx and the self-transmitting terminal Tx in the same manner as the self- And to transmit the cell to another transmitting end of the self.

In addition, the system / call control modules 140 provided in each of the shelves SF1 to SF3 are interconnected via a bus as shown in FIG. 5, and the bus transmits data at a high speed. In this manner, each system / call control module 140 is interconnected through a bus to exchange information related to call control, and to exchange information for controlling cell input / output timing. The system / call control module 140 provided in the self-designated self is connected to the system / call control module 140 of the other self, And provides information to the other system / call control module 140 to control the cell input / output timing.

The capacity expansion type ATM private network switch of the present invention operates as follows.

First, input / output matching modules 110R-1 to 110R-N of each of the shelves SF1 to SF3 receive a cell applied from a receiving end Rx and extract signal cells and OAM cells inside the header of the corresponding cell And outputs it to the system / call control module 140, modifies the VXT included in itself based on the information applied from the system / call control module 140, and based on the VXT, Cells are converted into a form that can be processed by the input buffer type lattice-structure switching modules 130-1 to 130-3 and output to the input buffer type lattice-structure switching modules 130-1 to 130-3. In this case, the VXT To the corresponding input buffer type grid structure switching modules 130-1 to 130-3 in accordance with the sel selection information provided in the input buffer type grid structure switching modules 130-1 to 130-3. At the same time, when the non-ATM terminal matching modules 120R-1 to 120R-M receive call information from the receiving end Rx, the non-ATM terminal matching modules 120-1 to 120- And outputs it to the input buffer type grid structure switching modules 130-1 to 130-3. Signal cells are generated according to the received call information and output to the system / call control module 140 Based on the information applied from the system / call control module 140, corrects the VXT included in the VXT and provides the corresponding input buffer type lattice structure switching modules 130-1 to 130-3 in accordance with the VXT self selection information Cells are output. Accordingly, the input buffer type lattice-structured switching modules 130-1 to 130-3 are supplied from the input / output matching modules 110R-1 to 110R-N and the non-ATM terminal matching modules 120R-1 to 120R-M The input buffer type lattice-structured switching module 130-1 is connected to the self input / output matching modules 110T-1 to 110T-N and the non-ATM terminal matching modules 120T-1 And the input buffer type lattice-structure switching module 130-2 outputs the input / output matching modules 110T-1 to 110T-N and the non-ATM terminal matching modules 120T-1 And the input buffer type lattice-structure switching module 130-3 outputs the input-output matching matrixes 110T-1 to 110T-N belonging to another self to the non-ATM terminal matching modules 120T- 1 to 120T-M). Thereafter, the input / output matching modules 110T-1 to 110T-N and the non-ATM terminal matching modules 120T-1 to 120T-M are connected to the input buffer type lattice structure switching module 130-1 To 130-3, converts the cell into a form that can transmit the cell based on the VXT provided therein, and outputs it to the transmitting end Tx side. On the other hand, when a signal cell and an OAM cell are input from the input / output matching modules 110R-1 to 110R-N, the system / call control module 140 processes the corresponding signal cell and the OAM cell, N to the input / output matching modules 110R-1 to 110R-N to perform the call control operation, and outputs the information for correcting the VXT of the non-ATM terminal matching modules 120R-1 to 110R-N When a signal cell is received, the signaling cell is processed to output information for correcting the VXT of the non-ATM terminal matching modules 120R-1 to 120R-M, thereby performing a call control operation. In addition, the system / call control module 140 of the self, which is designated as the base self, provides information for controlling the cell input / output operation timing to the other system / call control module side through the bus and mediates occupancy of the bus. When the input buffer type switching modules 130-1 to 130-3 switch and output the received cells, the input buffer type switching modules 130-1 to 130-3 switch to the corresponding output ports according to the output port information in the header of the received cell.

Although the ATM private network switch of FIG. 2 is shown to have three self-service routers (SF1 to SF3), it is not limited thereto and may have three or more self-service routers. Each self- Type grid switching module so that each self can output a cell inputted to its own receiving end Rx to its own transmitting end Tx side and also to a transmitting end Tx side of another self, can do. If the various buses connected between the respective shelves are connected using print wiring, the system configuration can be effectively performed.

INDUSTRIAL APPLICABILITY As described above, the present invention constitutes a multi-shelf system and switches input / output cells in each shelf, so that the number of subscription lines can be easily expanded, thereby efficiently configuring a large-scale private network.

Claims (4)

In an ATM private network switch, an exchange means for accommodating a unit affiliation line and switching the cells applied to the receiving end and outputting the cells through a transmission end is installed in a plurality of selfs, and each self exchange means exchanges cells To the transmitting end of another self; Wherein the switching means provided in each of the shelves includes a system / call control module for receiving and processing signal cells and OAM cells and outputting information for correcting VXTs; The control unit performs a function of matching the ATM terminals and outputs the signal cell and the OAM cell to the system / call control module side by receiving the cell applied from the receiving end, And converting the data cells into a form that can be processed by a plurality of input buffer type trellis switching modules based on the corresponding VXT to generate a corresponding input buffered grid A first input / output matching module for outputting the first input / output matching module to the structure switching module; Converts the call information received from the receiver into cells capable of being processed by the input buffer type lattice-structure switching module, and outputs the applied call information to the system / call control module side And a plurality of first bits for outputting cells to the corresponding input buffer type lattice-structure switching module in accordance with the sal selection information of the VXT by modifying the VXT included in the system / call control module, ATM terminal matching module; ATM terminals are matched and receive cells applied from an input buffer type lattice-structure switching module belonging to a self and a cell belonging to the self, and converts the cells into a form that can be transmitted based on the VXTs provided therein, A plurality of second input / output matching modules for outputting a plurality of input / output signals; ATM terminals, and receives cells applied from an input buffer type lattice-structure switching module belonging to a self and a cell belonging to the self, and converts the corresponding cells into a form that can transmit the cells based on the VXTs And a plurality of second non-ATM terminal matching modules for outputting the data to the transmitting terminal. The capacity-expanding ATM private network switch of claim 1, wherein each of the self-system / call control modules is interconnected via a bus for transmitting / receiving data at high speed. The capacity-expanding ATM private network switch of claim 1, wherein the first input / output matching module and the second input / output matching module are provided in pairs in the same device. The apparatus of claim 3, further comprising: an interface unit for interfacing a line to the same device, and transmitting an input / output cell; A FIFO for transferring an authorized signal cell and an OAM cell; A dual port RAM for transmitting packet type information to and from the system / call control module; The OAM cell is read from the signal cell and the OAM cell applied through the FIFO to form a packet and output to the system / call control module through the dual port RAM. A CPU for reading and outputting VXT correction information; Receives a cell applied from the interface unit, extracts a signal cell and an OAM cell in a header of the corresponding cell, and outputs the signal cell and the OAM cell to the CPU through the FIFO, thereby correcting the VXT of the cell based on information applied from the CPU, The input FIFO status signal and the cell start signal received from the input buffer type trellis switching module and outputs an input FIFO selection signal to the input buffer type trellis switching module, An input processor for outputting data cells via the input data bus to the input buffer type grid structure switching module; The VXT corrects the VXT provided by the CPU, receives the output FIFO upper order signal from the input buffer type lattice structure switching module, and outputs the output FIFO selection signal to the input buffer type lattice structure switching module And an output processor for receiving a data cell input through an output data bus from the input buffered trellis switching module and inserting header information based on the VXT to output a cell capable of being transmitted to the interface unit, Capacity extended ATM private network switch.