KR920011075B1 - Isdn calls simulator - Google Patents

Abstract

The circuit analyzes and measures the operation performing ability of a system by generating great amount of calls continously. The circuit is composed of a main process board (MPB;3) for controlling an external displaying device (CRT;S) and a floppy disk driver (4) and storing the results of calls, a "U" interface process board (UPB;1) for supplying "S" interfaces to users, and a "S" interface process board (SPB;2) for controlling the calls with network according to the command from the main process board (MPB;3).

Description

ISDN Call Simulator

1 is a block diagram showing the overall configuration of the present invention;

2 is an extended configuration block diagram of the present invention connected to the personal computer of the present invention;

3 is a block diagram showing an MPB configuration;

4 is a block diagram showing a module configuration of the SPB of the present invention;

5 is a block diagram showing a module configuration of the UPB of the present invention.

* Explanation of symbols for main parts of the drawings

MPB: Main Process Board SPB: “S” Interface Process Board

UPB: “U” Interface Process Board

The present invention is an ISDN that is connected to the "S" or "U" interface of the ISDN unit based on the integrated provision of various services, the ISDN subscribers accept the circuit to analyze and evaluate the performance of the ISDN exchange, etc. A terminal device, which relates to an ISDN call simulator for continuously generating a large number of calls into a network.

In the ISDN generating various services, there is no room for deciding on the characteristics of the service and the ISDN exchange that can provide such services, and there are currently terminal devices (TEs) or existing terminals with various service provisioning capabilities of ISDN. In parallel with the development of a matching function (TA), the development of ISDN network-related functions has been greatly activated to satisfy various types of service needs. The development of the ISDN terminal can be carried out separately from the development of network-related devices provided by the network provider. The international standardization work related to the realization of bearer service and teleservice on the manganese-interface centered on the CCITT is completed. And recommendations in Recommendations I.430, I.440, and I.450. On the other hand, since ISDN terminal integrates service and digital multiplexing in subscriber's house, it is necessary to define data link configuration and signal processing function, user call information and message control procedure according to this regulation. By configuring the system, compatibility with all CCITT standard subscriber access devices and exchanges can be maintained.

In addition, in developing ISDN exchanges, if the exchange performs basic functions to some extent, the ISDN service provisioning function should be tested in conjunction with the ISDN terminal, and then, any number of calls similar to the environment in which the exchange will be installed and operated. It needs to be controlled and tested. Connecting individual ISDN terminals to each subscriber line to operate individual terminals to generate a large number of calls continuously over the network is not only cumbersome but also inefficient and almost impossible to generate the necessary amount of calls. Therefore, a large number of calls can be generated efficiently by the processor and a large amount can be generated instantaneously depending on the method of generating the call. This method reduces the call processing capability of the exchange for call generation that can occur in an environment in which the exchange is to be installed and operated. You can check it.

An object of the present invention is to provide an ISDN call simulator for accommodating several subscriber lines of an ISDN according to the above requirements, and for analyzing and evaluating performance of an associated system by generating an arbitrary large number of calls continuously by an ISDN exchange. In order to achieve the above object, the present invention consists of a main process board (MPB), an interface process board (SPB), an interface process board (UPB), a CRT, and a floppy drive. The UPB is connected to the “U” interface and has the function of transmitting and receiving 2B + D signals according to the line coding method of the “U” interface, clock recovery function, and providing “S” interface. The SPB is connected to the “S” interface of the UPB. “S” interface means and HDCL connected to perform “S” frame configuration function, 4-wire connection function for transmission and reception, start / stop processing function, 100% AMI code processing function, clock recovery function, frame rearrangement and recovery function Data link control means that performs frame composition function and D channel priority control function, B channel control function that performs B channel exchange and allocation, connection with MPB, data transmission / reception function by HDCL frame, and each of the above means It is composed of the function that controls all the above functions, the software program processing function related to layer 1 to layer 3 and the interrupt processing function. The MPB is a control and management processor of the present invention. The MPB is a control and management processor of the present invention. The MPB is connected to the SPB and transmits / receives data by HDLC frames, and controls and manages the SPB. It consists of the execution function of the scenario, the drive interface function, the input / output of the scenario through the disk, the storage of the scenario results, the connection function with the PC, and the command and scenario execution functions received from the PC that can report the scenario results to the PC. Is used to create and monitor call control scenarios in MPB, and Polari Drive is composed of functions to store programs and data required by MPB.

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

1 is a block diagram showing the overall configuration of the present invention, wherein (1) is UPB, (2) is SPB, (3) is MPB, (4) is Flappy Brave, (5) is CRT, ( 6) represents PC, respectively. As shown in the figure, the present invention accommodates 32 subscriber lines using four UPBs and eight SPBs, and the UPB has the same eight independent modules in the board, and the SPB has eight independent modules in the board. Has The network access criteria shall be accessible to the “S” reference point and shall be accessible to the “U” reference point by accommodating the UPB. In addition, the UPB should be able to be replaced according to the line coding method of the “U” reference point. In order to have the independent Man-Machine interface of the present invention, CRT is used as an external display function and an input function, and a floppy drive is used to store test scenarios and test results. MPB uses CP / M as OS and controls 32 SPB modules as shown in the figure.The SPB controls the form of ISDN call control messages related to call origination or edits them in MPB or PC and sends them to SPB. It has the ability to perform call control message generation and analysis in a format.

2 is an expanded block diagram of the present invention connected to a PC of the present invention, where 21 is a PC, 22 is an EIA RS-232C connection point of a PC, and 23 represents the present invention. As shown in the figure, the present invention can be connected to the EIA RS-232C connection terminal of the PC by the number of EIA RS-232C connection terminals that can be provided by the PC, and generated for a large amount of calls from the PC. And control the truncation, watch the call performance and save the results.

3 is a block diagram showing the configuration of the MPB, in which 31 is a system controller, 32 is an SPB communication unit, 33 is a drive control unit, 34 is a PC communication unit, and 35 is a CRT connection unit, respectively. Indicates. The system control unit 1 is connected to the SPB communication unit, the drive control unit, the PC communication unit, and the CRT connection unit, and has an interface signal similar to that of the 80-based LSI, and is compatible with software for CP / M. It is composed of peripheral I / O logic to control all functions by using CP / M, command to SPB communication unit, analyze received data, read and save data with drive, and receive data by polling of PC. It has the function of sending a response, creating a call control scenario using CRT, displaying the necessary contents, and RTC function to have a reference time. The SPB communication unit 2 is connected to the system control unit, and has a function of connecting to the SPB and the EIA RS-485 and a point-to-multipoint configuration function and an HDLC communication function by DMA to communicate with multiple SPBs in polling. Full-duplex communication is performed by separating the receiving function. The drive controller 33 is connected to the system controller, and is composed of an FDC and a PIO, and performs a driver connection function, so that the FDC reads and writes data, seeks, and loads the head of the drive onto a disk surface. The PIO performs the step motor's on / off control, head selection, flow density selection and drive selection. The PC communication unit 4 is connected to the system control unit and performs asynchronous communication with the PC through the EIA RS-232C connection. The CRT connection unit 5 is connected to the system control unit by EIA RS-232C, and transmits and receives data for creating a call control scenario and displaying the necessary data.

4 is a block diagram showing the configuration of one module among four identical modules independently executed by the SPB, and each module has a function of generating a call to an ISDN network independently under the control of the MPB. The system control unit 42 is an MPB connection unit, 43 is a monitor connection unit, 44 is a line interface connection unit, 45 is a data link connection unit, and 46 is a B channel control unit. As shown in the figure, the system control unit 41 of the present invention is connected to the MPB connection unit, the monitor connection unit, the line interface unit, the data link control unit, the B channel control unit, and has one processor, 64K byte, ROM, 32K byte RAM, and a peripheral device. It is composed of input / output logic to control all functions, control the software program related to layer 1, layer 2, and layer 3, control data transmission / reception of data link control unit, and analyze and transmit data of MPB connection unit and interrupter. Has a processing function.

The MPB connection unit 42 is connected to the system control unit, has MPB and EIA RS-485 connection functions, FCS processing and address checking functions for flag detection and generation, zero insertion and removal, error detection, and MPB as an HDLC communication means using an interrupter. Performs data transmission and reception by the polling method. The monitor connection unit 43 is connected to the system control unit and has an EIA RS-232C connection function for monitoring a process in the SPB module and transmits data received from the system control unit to the monitor. It is connected to the line interface unit 44, the B-channel control unit, the data link control unit, and the system control unit, and the “S” frame configuration function, 4-wire connection function for transmission and reception, start / stop processing function, 100% AMI code processing function, and clock Performs recovery and frame rearrangement and recovery. The data link control unit 45 is connected to the line interface unit and the system control unit. The data link control unit 45 is composed of D channel control and LAPD control to detect and generate a flag, zero insertion and removal, FCS processing for error detection, and D channel priority control function. And address verification function. The B channel control unit 46 is connected to the line interface unit and the system control unit, has a B channel switching function, a B1 and B2 channel allocation function, and receives a command from the system control unit.

FIG. 5 is a block diagram showing a configuration of one module among eight identical modules independently performed by UPB, and performs a function of a network terminator (NTE) connecting an “U” connection point and an “S” connection point. Reference numeral 51 denotes a "U" connection, and 52 denotes a "S" connection. The “U” connection is connected to the “S” connection by the internal bus and has the frame configuration function, clock replay function, and test function on the network side or subscriber side of the “U” interface, and the “S” connection 52 is connected to the internal bus. It transmits data with “U” connection, has start / stop function, D channel control function and S frame configuration function and provides “S” interface to subscriber.

The use of the present invention as described above allows the generation of ISDN exchanges by randomly generating a large amount of calls similar to the actual environment in which the exchanges are to be operated, thereby analyzing and checking the call processing capability of the exchanges. Contributes greatly to realization.

Claims (5)

Display and input means (CRT) having display and input functions external to the device, a flappy drive for storing the scenarios and test results, connected to the display and input means and the flappy drive to control the means and drive “U” which is connected to “U” interface of main process board (MPB) and ISDN network that gives commands by generating and cutting call to network and saves the result of the call and provides “S” interface to subscriber. "S" connected to the interface process board (UPB) and the "U" interface process board (UPB) and the main process board (MPB) to control a call to the network by a command of the main process board (MPB). ISDN call simulator, characterized in that consisting of the interface process board (SPB). The ISDN call simulator according to claim 1, further comprising an EIA RS-232C connection means for connecting to a personal computer, and configured to be extended by as many connection terminals as said personal computer. The apparatus of claim 1, wherein the “U” interface processor board receives 32 “U” interfaces to provide network control means for creating and cutting calls into a network, and to provide call control commands and to manage statistics of results. ISDN call simulator, characterized in that the distributed configuration. 4. The ISDN call simulator according to claim 3, wherein the user management means is configured to perform data transmission / reception on an HDLC frame by connecting to the network related control means via a DIA RS-485. 4. The network control means according to claim 3, wherein the control means associated with the network is connected to the "S" interface, the "S" frame configuration function, 4-wire connection function for transmission and reception, start / stop processing function, 100% AMI code processing function, and clock recovery function. And “S” interface means to perform frame rearrangement and recovery, data link control means to perform HDLC frame composition and D channel priority control, and B channel control to perform B channel exchange and allocation. It is connected to each means and consists of the function to control all the above functions, the software program processing function related to layer 1 to layer 3 and the interrupt processing function. ISDN call simulator featuring.

Images