KR20010083748A - Output and input matching unit of communication system - Google Patents

Abstract

PURPOSE: An apparatus for matching input/output of an exchanger of a communication system is provided to enable fast large capacity communication by using both RS-232 interface method and RS-422 interface method. CONSTITUTION: A CPU(12) generates a port switching control signal of the affected specific communication path to control the specific communication path of data inputted and outputted in a main board(20) and a terminal of an exchanger. A switch(13) selects the affected port according to the switching control signal for switching data loaded in an internal data bus. An RS-232 data framer(14) transforms data input through the channel of the switch(13) into RS-232 data format and transmits the transformed data. An RS-232 buffer(15) is connected between the RS-232 data framer(14) and the terminal for processing transmitted data in serial transmission method. An HDLC(High level Data Link Control) data framer(16) transforms data input through the channel of the switch(13) into HDLC data format and transmits the transformed data. An RS-422 buffer(17) transforms serial data in HDLC format into a differential signal for transmitting the data to the terminal and receives serial data in HDLC format transmitted from the terminal for transmitting the data to the HDLC data framer(16). A debug port(11) is connected to the CPU(12) for controlling communication of the terminal and managing the communication state of the terminal.

Description

I / O matching device of exchange in communication system {OUTPUT AND INPUT MATCHING UNIT OF COMMUNICATION SYSTEM}

The present invention relates to an input / output matching device of an exchange in a communication system, and in particular, an RS-232 interface (RS-232 interface) is used as a communication method between an input / output matching device in a switch and various terminals of a mobile communication system employing a CDMA method. The present invention relates to an input / output matching device of an exchange of a communication system which enables high-speed mass communication between the input / output matching device and a terminal by using a 422 interface system.

In general, a switch in a communication system performs man-machine communication (MMC) matching with various terminals, that is, the operator controls the switch through various terminals such as a CRT, a PC, and a work station. Monitor the various information generated through the terminal.

At this time, the various information generated by the exchange is collected in the Man-Machine Interface Processor (MMP) block through the Inter Processor Communication (IPC), and then the terminal through the Input Output Control Processor Board Assembly (IOPA), an input / output matching board in the MMP block. By outputting this information, the operator can know the information.

When the operator inputs a control command through the terminal to control the exchange, the control command is transmitted to the MMP block through the IOPA to execute an application block that performs the control command.

IOPA, the input / output matching board used in the MMP block, is dual-operated with Active / Standby, and the actively operated IOPA controls up to 16 ports, and at this time, RS- is used as a communication method between the IOPA and various terminals. Use the 232 interface method.

That is, the IOPA of the conventional exchange that uses the RS-232 interface method for communication with various terminals, the CPU 1 and the RS-232 Data Framer 2 and RS-232 as shown in FIG. It consists of an RS-232 port (4) consisting of a buffer (3).

On the other hand, referring to the operation of the conventional device of the above configuration, when transmitting a communication signal to an external board (not shown), the CPU 1 transmits the communication signal to the RS-232 data framer (2) of the RS-232 port (4) The RS-232 data framer 2 converts the input communication signal into the required form, and then performs high-speed data transmission using the internal data bus.

At this time, when the communication with the terminal connected to one port is terminated and the response signal Ack is received from the RS-232 data framer 2 and the RS-232 buffer 3, the CPU 1 communicates with the next. The port connected to the terminal is accessed and selected by a polling method to communicate with the corresponding port.

However, the conventional RS-232 interface method provides a data transfer rate of up to 115Kbps (typically 9600bps), thus providing a data transfer rate of up to 115Kbps between the RS-232 data framer 2 and the RS-232 buffer 3. You will not be able to speed outside. Therefore, such a conventional device has a problem that a lot of time delay occurs such as a data bottleneck occurs when a large amount of information is exchanged between the exchanger and the operator because the data transmission rate is low and high speed information transmission is impossible. In addition, there is a problem that causes an excessive load on the MMP block.

And if 16 terminals are connected because IOPA can match up to 16 ports, the data transmitted and received through each terminal is lost due to the occurrence of many time delays.

In addition, when the data transmission speed is increased in the RS-232 interface method, an error occurrence rate on the communication path is greatly increased, and an error recovery routine is required by software.

Accordingly, the present invention has been made to solve the above problems, and RS-232 interface method as a communication method between IOPA and various terminals in the switchboard of the mobile communication system applying the CDMA method as well as high-speed Its purpose is to provide the input / output matching device in the exchange system of the communication system that enables high-speed large-capacity communication between the IOPA and the terminal by using the RS-422 interface method capable of transmitting large amounts of information.

1 is a block diagram of an input / output matching device in an exchange in a conventional communication system;

2 is a block diagram of an input / output matching device in an exchange in a communication system according to the present invention;

Figure 3 (a) and (b) is a flow chart showing the operation of the input and output matching device in the exchange of the communication system according to the present invention.

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

10: IOPA 11: debug port

12: CPU 13: switch

14: RS-232 data framer 15: RS-232 buffer

16: HDLC data framer 17: RS-422 buffer

20: main board

The present invention for achieving the above object is a CPU for generating a port switching control signal of the specific communication path to control the specific communication path of the data input and output to the main board and the terminal of the switch, and switching control of the CPU A switch that selects a corresponding port according to a signal for switching and transmitting data on an internal data bus, an RS-232 data framer that converts and transmits data input through the switch path into an RS-232 data format, and the RS An RS-232 buffer connected between the -232 data framer and the terminal to process the inputted transmission data in a serial transmission method, and an HDLC data framer that converts the data input through the path of the switch into an HDLC data format and transmits the converted data; The serial data of HDLC format inputted from the HDLC data framer is converted into a differential signal. And an RS-422 buffer for receiving the HDLC format serial data transmitted from the terminal to the HDLC data framer, and a debug port connected to the CPU to manage communication control and status of the terminal. An input / output matching device in an exchange of a communication system is provided.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the input and output matching device of the communication system switch according to the present invention.

2 is a block diagram of the IOPA 10 in the exchange of the communication system according to the present invention. First, the device of the present invention IOPA (10) transmits the data transmitted from the main board (Main Board) 20 for controlling and maintaining the function of the MMP block to the framers constituting each port through the internal data bus, A communication function of the CPU 12 and the CPU 12 which receives data inputted from each terminal to each port through an internal data bus and transmits the same to the main board 20, and outputs a switch control signal for selecting a port. Converts the data input through the data bus to the RS-232 data format according to the control signal to the RS-232 buffer 15, and transmits the data input from the RS-232 buffer 15 via the data bus. RS-232 data framer 14 and the RS-232 data framer 14 to transmit the data of the RS-232 data framer 14 to a terminal, receive the data transmitted from the terminal, and transmit the RS-232 data framer 14 to the RS-232 data framer 14; 232 According to the buffer 15 and the communication control signal of the CPU 12, the data input through the data bus is converted into the HDLC data format and transmitted to the RS-422 buffer, and the HDLC data input from the RS-422 buffer is read. The HDLC data framer 16 transferring the data to the data bus through the switch 13 and the corresponding port is selected according to the switch control signal of the CPU 12 to transfer the data on the internal data bus to the RS-232 data framer or HDLC ( High level Data Link Control) switch 13 for transmitting to a data framer and transferring data input from an RS-232 data framer or an HDLC data framer to an internal data bus to the CPU 12, and the HDLC data framer ( 16) HDLC format serial data transmitted from 16) is converted into differential signal and transmitted to the terminal, and HDLC format serial data transmitted from the terminal is transmitted. Receiving and consists of the HDLC data framer RS-422 buffer (17) for transmitting (16).

Here, the CPU 12 of the IOPA 10 is connected to a debug port 11 connected to a terminal (not shown) for managing communication control and status.

The port consisting of the RS-232 data framer 14 and the RS-232 buffer 15 is an RS-232 port, and the port consisting of the HDLC data framer 16 and the RS-422 buffer 17 is an RS-422 port. Port.

In addition, the RS-232 buffer 15 and the RS-422 buffer 17 are connected to various terminals such as a CRT, a PC, a workstation, and the like for communicating with an exchange, and the RS-232 buffer 15 is connected to the RS-232 buffer 15. A CRT dedicated to 232 communication is connected, and a PC or workstation providing a commercially available built-in HDLC control card is connected to the RS-422 buffer 17 to perform high-speed mass data transmission.

On the other hand, in the present invention, the control of the CPU 12 for the switch 13 for data bus matching is not controlled by the dip switch or the debug port 11, but each of 16 individual ports using 16EA switches is used. Match it.

In the present invention configured as described above, when the large-capacity data is exchanged between the IOPA 10 and the terminal at high speed, the terminal may be connected to an external network such as a local area network (LAN) to allow the operator to remotely control and monitor the IOPA. have.

The main board 20 is a configuration in which an operating system (OS) and an application block are mounted to control and maintain an MMP block. The main board 20 communicates data with the IOPA 10 through a VME bus. In addition, the application blocks interact with each other to process data sent and received between the IOPA and the terminal.

The operation of the input / output matching device, that is, the IOPA according to the present invention configured as described above will be described with reference to the flowcharts of FIGS. 3A and 3B.

The operator operates the dip switch in the IOPA 10 or selects whether the input / output port for the MMC communicates via RS-232 or RS-422 through the debug port 11.

That is, the operator can designate a port to be used in the data packet transmitted in the order of application block, OS, and IOPA (10) in the MMP block when transmitting data to the terminal, and receiving data when receiving data from the terminal. The port generates an interrupt to the CPU 12 to notify that it has received data.

When data is transmitted to the terminal, as shown in FIG. 3A, if data to be transmitted to the terminal is transmitted from the main board 20 in the state in which the IOPA 10 is active (S11), the CPU ( 12) check whether the port designated in the data packet transmitted in the order of application block, OS, and IOPA in the MMP block is an RS-232 port or an RS-422 port (S13); The data loaded on the data bus is transmitted to the RS-232 data framer 14 through S14. If the RS-422 port is used, the data loaded on the data bus is transmitted to the HDLC data framer 16 through the switch 13 ( S15).

When receiving data from the terminal, as shown in (b) of FIG. 3, when an interrupt is generated from the corresponding port while the IOPA 10 is active (S21) (S22), the CPU 12 Check whether the generated interrupt is generated in the RS-232 data framer 14 or the HDLC data framer 16 (S23), and if it is generated in the RS-232 data framer 14, the data is transmitted through the switch 13. The bus is connected to the RS-232 data framer 14 (S24), and if generated in the HDLC data framer 16, the data bus is connected to the HDLC data framer 16 via the switch 13 (S25).

As described above, when data carried on the data bus via the switch 13 is transmitted to the RS-232 data framer 14 in the RS-232 port, the RS-232 data framer 14 transfers the data to RS-232 data. After converting to a format, the RS-232 buffer 15 transmits the data, and the RS-232 buffer 15 transmits the data transmitted from the RS-232 data framer 14 to the terminal.

When the data loaded on the data bus via the switch 13 is transmitted to the HDLC data framer 16 in the RS-422 port, the HDLC data framer 16 converts the data into the HDLC data format and transmits the RS-422 buffer ( 17), and then the RS-422 buffer 17 converts the serial data of the HDLC format transmitted from the HDLC data framer 16 into a differential signal and transmits the differential signal to the terminal.

Conversely, if an interrupt from the port occurs at the RS-232 data framer 14 in the RS-232 port and the data bus is connected to the RS-232 data framer 14, the RS-232 data framer 14 has RS-232. The data of the terminal input from the buffer 15 is transferred to the CPU 12 through the data bus by the operation of the switch 13 and finally transferred to the main board 20.

When an interrupt from the port occurs in the HDLC data framer 16 in the RS-422 port and the data bus is connected to the HDLC data framer 16, the HDLC data framer 16 inputs from the RS-422 buffer 17. The serial data of the HDLC format of the terminal is transmitted to the CPU 12 through the data bus by the operation of the switch 13 and finally to the main board 20.

As described above, according to the present invention, the IOPA in the exchange uses the RS-232 interface method and the RS-422 interface method in combination so that high-speed and large-capacity information can be exchanged between the IOPA and the terminal, that is, the exchanger and the operator. The efficiency can be increased, and the terminal can be connected to an external network, so that the exchange can be controlled and monitored remotely.

In addition, it is possible to prevent the loss of data caused by the time delay during communication between the IOPA and the terminal.

Claims (2)

An input / output matching device for performing data communication between an exchange and a terminal of a CDMA mobile communication system, A CPU for generating a port switching control signal of a specific communication path to control a specific communication path of data input and output to and from the main board and the terminal of the switch, and selecting a corresponding port according to the switching control signal of the CPU to select an internal data bus. A switch for switching and transmitting the data contained in the data, an RS-232 data framer for converting and transmitting data inputted through the switch path into an RS-232 data format, and connected between the RS-232 data framer and a terminal. RS-232 buffer for processing the transmitted data by serial transmission method, HDLC data framer converting the data input through the path of the switch into HDLC data format, and HDLC format serial input from the HDLC data framer Convert data into differential signals and transmit them to the terminal, and transmit from the terminal An RS-422 buffer for receiving the serial data in the HDLC format and transmitting the received serial data to the HDLC data framer, and a debug port connected to the CPU to manage communication control and status of the terminal. Input / output matching device. The method of claim 1, And the switch is connected to each individual port of the RS-232 port and the RS-422 port for 16EA, respectively.