KR100287903B1 - Integrated Multifunction Exchange Module Device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange, and more particularly, to an integrated multifunction exchange module device configured to be configured as one module that organically combines signal processing units of an exchange module to perform basic call processing functions of the exchange. Such an integrated multifunction exchange module includes a clock generator for generating a clock of a constant frequency, an ATM cell switch for receiving and transmitting data according to the clock, and a DTMF receiver for receiving and filtering output data of the ATM cell switch. And a controller for generating a control signal according to the output data of the DTMF receiver, and a bus controller for controlling transmission of the received and transmitted data according to the control signal of the controller. It consists of a module including a utopia connection block communicating with the device and a redundancy control unit that determines a control mode according to the clock of the clock generator, so that the exchanger can easily expand capacity and reduce cost. Reliability and stability can be guaranteed throughout the system.

Description

Integrated Multifunction Exchange Module Device

The present invention relates to an exchanger, and more particularly, to a method of implementing an integrated multifunction exchange module, which is configured to perform a basic call processing function of an exchange by configuring a single module in which signal processing units of an exchange module are organically combined.

In general, an asynchronous transfer board exchanger can consist of multiple nodes. That is, it consists of a Central Processor Module node (CPM node) and a Local Switching Module node (LSM node). The initialization procedure for each node is performed by the central processing unit (CPU) of the exchange. Is done.

1 is a block diagram of a general exchange module.

Referring to FIG. 1, an implementation method of an exchange module used in a general exchange includes a clock generator 120 supplying a clock used in a system and synchronizing with an input signal, and a subscriber signal according to the generated clock. Subscriber board 170 that generates, subscriber control unit 160 for controlling the subscriber board, and all the control related to the call processing of the subscriber input according to the clock generated by the clock generator 120 and generates accordingly A control unit / memory 100 for storing various kinds of data, a switching unit 130 for connecting a call path with a subscriber under the control of the control unit / memory 100, and a call with the subscriber via the call path. A message processing unit 110 for processing a related message and transmitting a result thereof, and a dual tone multiple frequency (DTMF) which is a telephone number to which a subscriber wants to talk through the communication path DTMF receiving unit 150 for recognizing a signal (DTMF) and a tone generator 140 for generating various tones required by the system when the subscriber calls.

The exchange module configured as described above makes a call by operating each functional unit mounted in a module or board unit in the exchange system.

First, when a subscriber is off-hook by lifting a handset to start a call, the subscriber board 170 and the subscriber control board 160 of the exchange module transmit a message to the message processing unit 110 when a call signal is detected. The signal is finally notified to the controller / memory 100.

At this time, the CPU of the control unit 100 examines the subscriber class of the calling signal, and if the subscriber is allowed to send out, drives the message processing unit 110 to instruct each functional unit in the exchange module to perform a corresponding function for the subscriber's call. .

That is, the tone generating unit 140 generates a tone to transmit a signal, and the DTMF receiving unit 150 receives the DTMF tone of the calling subscriber to recognize the counterpart phone number.

When the counterpart phone number recognized by the DTMF receiver 150 is notified to the controller 100, the controller 100 connects another subscriber's call path through the switch 130.

However, such a conventional exchange module is configured as a processing unit consisting of several boards or a processing unit consisting of one board in case of a large capacity accommodating a large number of subscriber's calls, so the entire exchange system is composed of a plurality of boards. It is constructed.

On the other hand, in the case of the exchange module used in the small-capacity exchanger, each processing unit for the call is made small and constituted as a single board, but due to the configuration limitations made using the conventional method, expansion to a large-capacity exchanger is not easy. .

Therefore, the exchange configured using such an exchange module has a problem that the size and complexity of the exchange module does not guarantee the reliability and stability of the overall system.

An object of the present invention has been made in view of the above-mentioned problems of the prior art, an integrated type to perform the basic call processing function of the exchange by organically combining the signal processing units of the exchange module to form a single module It is to provide a method for implementing a multifunction exchange module.

According to one aspect of the present invention for achieving the above object, the integrated multi-function switching module device according to the present invention is a clock generator for generating a clock of a constant frequency, ATM cells for receiving and transmitting data in accordance with the clock A switch, a DTMF receiver for receiving and filtering output data of the ATM cell switch, a control unit for generating a control signal according to the output data of the DTMF receiver, and data received and transmitted according to the control signal of the control unit A bus controller configured to control transmission of a signal, comprising a utopia connection block communicating with an external device according to a control signal of the controller, and a redundancy controller configured to determine a control mode according to a clock of the clock generator. It is composed.

Preferably, the utopia access block transmits data of the ATM cell switch to the outside or receives data input from the outside.

In addition, the redundancy control unit operates in an acton / standby manner so that when a board acting as the acton malfunctions, another board operating as the standby senses this to control the function of the multifunction exchange module board in which the malfunction occurs.

1 is a block diagram of a general exchange module.

2 is a block diagram of an exchange module according to the present invention;

3 is a detailed view of an exchange module according to the invention.

4 is a system application of the exchange module according to the present invention.

* Description of the symbols for the main parts of the drawings *

200: bus controller 210: control unit

220: DTMF receiver 230: clock generator

240: utopia connection block

250: ATM cell switch

260: redundant control unit

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of an exchange module according to the present invention.

Referring to FIG. 2, the integrated multifunction switching module according to the present invention includes a clock generator 230 for supplying a clock necessary for the operation of each processing unit of the multifunction switching module and simultaneously generating a clock synchronized with a signal of a subscriber; A DTMF receiver 220 having a function of recognizing a DTMF type signal of a subscriber which is synchronized according to the clock signal, and receiving an output of the DTMF receiver, recognizes a subscriber signal and controls the entire module. A control unit 210 for receiving and transmitting data for call processing from the function blocks of each unit and performing a corresponding function, and the CPU of the exchange module control unit 210 as an IPC (Inter Processor Controller) of the system and the lower local board. A bus controller 200 for transmitting a message to a processor and an ATM cell multiple of 53 bytes of ATM cells input according to a control signal of the controller. ATM cell switch 250 that transmits through an internal switching formed by a self-loop function of a mobile station or to an external exchange module, and a cell-type voice and message transmitted from the ATM cell switch to the outside through a 155Mbps UTP5 link. A utopia connection block 240 having a function of transmitting, and a redundancy control unit 260 having a function of controlling the acton / standby system redundancy between the two exchange modules.

An embodiment of the exchange module according to the present invention configured as described above will be described with reference to FIGS. 3 and 4.

Figure 3 is a detailed view of the exchange module according to the present invention, Figure 4 is a system application of the exchange module according to the present invention.

3 and 4, an integrated multifunction exchange module according to the present invention includes a clock generator including a VCXO 331, an SRAM 332, and a clock logic 333 having a digital PLL therein. 330, a CPU 310, a DRAM 312, a controller 310 composed of the SRAM 313, a boot ROM 314, and an address decoder 315, and 8-bit data capable of parallel and serial transmission. An X-bus controller 301 generating a bus and four control signals, a bus controller 300 composed of an M-bus controller 302 and a packet SRAM 303 which are in charge of operating a local board, and a DSP ( 321, a DTMF receiver 320 composed of a program driving SRAM 322 and a DSP controller 323, a utopia connection block 340 composed of a sonnet flamer 341 and a UTP5 transmitter 342, ATM cell multiplex (351), FIFO (352), cell / PCM converter (353), PCM / cell converter (354), SRAM (355), and transmit cell buffer An ATM cell switch 350 composed of 356 and a receiving cell buffer 357, and a redundancy control section 360 composed of a packet DRAM 361 and a redundant input / output unit 362 are comprised.

Initial driving of the integrated multifunction exchange module configured as described above is driven by a program stored in the boot ROM 314.

At this time, the actual application program is provided from the hard disk 400.

That is, as shown in FIG. 4, the application program provided from the hard disk 400 is provided to the operation / maintenance board 410 which manages lower layers in the ATM switch, and the provided data is provided through the 155Mbps UTP5 link. Via 420 is transmitted to the utopia connection block 340 of the multifunction exchange module 430.

Subsequently, the transmitted program data is input in a cell form to the ATM cell multiplex 351 of the ATM cell switch unit 350, and the ATM cell multiplex 351 reassembles the input cell data into a packet. After that, the data is transmitted to the CPU 311 of the controller 310.

Then, the packet transmitted to the CPU 311 is stored in the program area of the DRAM 312 connected to the CPU 311, the multifunction exchange module 430 is operated by the program stored in the DRAM 312, the initial drive setting Is complete.

In this state, when the general subscriber receives the handset for the call, the corresponding subscriber board 440 recognizes the off-hook signal, which is the calling signal of the subscriber, and transmits the recognized message through the message path.

At this time, the subscriber board 440 requests the use of the bus band for transmitting the subscriber's message to the multi-function switching module 430 to the X-bus controller 301 in the multi-function switching module 430.

The bus controller 300 then sends a grant signal to the subscriber board 440 if the bus is not currently in use. This permission signal ensures the minimum value by dividing the transmission band of the bus by the number of all boards accepted by the bus so that all lower boards in the multifunction exchange module 430 can use the bus evenly.

When the other board is not using the bus, information is transmitted so that the board which wants to use the bus can use up all the transmission bands of the bus.

The data transmitted from subscriber board 440 is then input through PCM / cell converter 354 of ATM cell switch 350.

Subsequently, the input subscriber signal is transformed into a packet in the ATM cell multiplex 351, and the X-bus controller 302 stores the packet generated in the ATM cell multiplex 351 in the packet SRAM 303. .

Subsequently, the CPU 311 analyzes the data stored in the packet SRAM 303 and if it is determined that the subscriber class of the data is a call signal of a normal subscriber, the CPU / 311 via the cell / PCM converter 353 in the ATM cell switch 350. The dial tone of the tone source stored in the receiving cell buffer 357 is transmitted to the timeslot of the receiving hardware of the subscriber, and this signal is transmitted to the subscriber again, so that the subscriber board 440 and the multifunction switching module 430 are transmitted. Basic call setup is completed.

In this state, the subscriber presses the DTMF digit to transmit the telephone number to be called to the PCM / cell converter 354 of the multifunction exchange module 430, and the PCM / cell converter 354 of the multifunction exchange module 430 A time slot coming in at 2 Mbps from the transmission hardware of the subscriber board 440 is converted to a transmission rate of 4 Mbps and transmitted to the DSP 321 in the DTMF receiver 320.

At this time, the DSP 321 is operated by the DSP program, which is stored by the CPU 311 as the DSP program driving SRAM 322 in the boot ROM 314 when the multifunction exchange module 430 is initially driven. will be.

The DSP 321 filters the digits of the cell input by the digital filter portion of the DSP program to recognize the counterpart phone number, and transmits the value to the CPU 311 of the controller 310 through the DSP controller 323. do.

The DSP controller 323 generates various clocks necessary for the DSP 321 to operate, transmits the output values of the DSP 321 to the CPU 311, and the CPU 311 is stored in the boot ROM 314. It serves to store a program to the DSP program driving SRAM 322.

As such, when the called party's telephone number which the subscriber recognized by the DTMF receiver 320 wants to talk is notified to the CPU 311 of the controller 310, the CPU 311 connects the desired call path through the ATM cell switch 350. Give it.

That is, the ATM cell switch 350 having the capacity to switch 1000 PCM time slots (32 channels), which is a 64 Kbps transmission rate, is inputted to the PCM / cell converter 354 under the control of the CPU 311. Converts PCM information, which is a signal of?, Into a cell form, and temporarily stores it in the transmission cell buffer 356; The stored data is then transformed into a 53-byte ATM cell and stored in the FIFO 352 for transmission to the ATM cell multiplex 351.

Then, the ATM multiplex 351 analyzes the virtual path identifier (VPI) and the virtual channel identifier (VCI) of the 53-byte ATM cell, which is the voice data transmitted from the PCM / cell converter 354, so that the input signal is itself. If it is a call between subscribers between exchange modules, it switches locally to the cell / PCM converter 353 and transmits it.

However, if the ATM multiplex 351 is a call with a subscriber connected with another exchange module as a result of analyzing the input ATM cell, the ATM cell multiplexes with the global message to be transmitted to the corresponding exchange module and then the sonnet of the utopia access block 340. It transmits to the framer 341.

Accordingly, the data to be transmitted to the external exchange module is transmitted to the ATM switch board 420 shown in FIG. 4 via the sonnet framer 341 and the UTP5 transmitter 342 to the subscriber in the corresponding exchange module.

As such, when the subscriber attempts to make a call, the multi-function exchange module according to the present invention switches internally and transmits the data to the internal subscriber board under the control of the controller 310 or transmits data through the utopia access block 340 to the ATM switch board 420. ), It can be transmitted to the subscriber board of the external exchange module.

On the other hand, the redundancy control unit 360 serves to control the redundancy of the Acton / Standby method between the plurality of multi-function exchange module 430.

That is, the redundancy control unit 360 is a board that is controlled by a plurality of lines, when a board operating in normal acton causes a malfunction or abnormality occurs, other boards operating in standby at the same time detects it and converts itself into an acton. By exchanging the functions of the exchange module, the exchange module can always operate normally.

As described above, the present invention implements a plurality of functional boards in charge of various functions in order to make a call in the exchange module in the form of a single integrated module board, so that the capacity of the exchange can be easily expanded and the cost can be reduced. It has the effect of ensuring reliability and stability as a whole.

Claims (3)

A clock generator for generating a clock of a constant frequency, an ATM cell switch for receiving and transmitting data according to the clock, a DTMF receiver for receiving and filtering output data of the ATM cell switch, and output data of the DTMF receiver A control unit for generating a control signal according to the control unit; and a bus controller for controlling transmission of the received and transmitted data according to the control signal of the control unit. A utopia access block communicating with an external device according to a control signal of the controller; Integrated multi-function switching module device comprising a redundancy control unit for determining a control mode according to the clock of the clock generator. The integrated multifunction exchange module device according to claim 1, wherein the utopia access block transmits data of the ATM cell switch to the outside or receives data input from the outside. According to claim 1, wherein the redundancy control unit is operated in the acton / standby mode, the other board operating in the standby when the board acting as the acton detects this to control the function of the multifunction exchange module board in which the malfunction occurs Integrated multifunction exchange module device, characterized in that.