KR20000072934A - Apparatus for testing broadband code division multiple access base transceiver station and method for controlling the apparatus - Google Patents

Abstract

PURPOSE: A method for controlling a wideband code division multiple access(W-CDMA) base station tester is provided to restrict a user operation, when a receiving sensitivity test of a wireless local loop(WLL) is performed, by the tester and a controlling program, so as to previously prevent an operator's manual errors. CONSTITUTION: A measuring equipment is set up in a wideband code division multiple access(W-CDMA) base station tester. A personal computer(PC) is connected with the tester. A window program is operated. The window program opens a transceiving attenuator control window. A variable degree is inputted through the transceiving attenuator control window. A printer porter of the PC is connected with a data input of a buffer. Corresponding information is stored in a latch. A control unit controls the stored data. The controlled data is enabled and decided to be outputted.

Description

Broadband code division multiple access base station test apparatus and control method of the test apparatus {APPARATUS FOR TESTING BROADBAND CODE DIVISION MULTIPLE ACCESS BASE TRANSCEIVER STATION AND METHOD FOR CONTROLLING THE APPARATUS}

The present invention verifies the radio frequency (RF) radio performance of a base station and a terminal station of a wireless local loop (WLL) system using a broadband code division multiple access (B-CDMA) scheme. In particular, the present invention relates to a broadband code division multiple access base station test apparatus and a test method for a test apparatus for performing transmission and reception tests of a base station and a terminal station by connecting a base station and a terminal station by a wired path and then setting up a call path. will be.

1 is a block diagram of a transmission and reception path between a base station and a terminal station for verifying a conventional high frequency performance. As shown therein, a variable step of manually varying path loss by being connected to a base station 10 for verifying high frequency performance and a transmission and reception path between the base station 10 and the terminal station 40. It consists of an attenuator 20, 30. The operation thereof is as follows.

In the conventional case, variable step attenuators 20 and 30 are inserted in the transmission and reception paths between the base station 10 and the terminal station 40 in order to verify the RF performance. The path loss was changed by manual operation using the inserted variable step attenuators 20 and 30.

Therefore, when the amount of attenuation of the variable step attenuators 20 and 30 is changed in the state where the call is set, a call, that is, a break of voice, occurs in the case of voice. On the other hand, in the case of data, when the bit error rate (BER) is measured, the data bit is broken when the attenuation amount is changed.

Therefore, in the above case, if a problem occurs in the reliable and accurate measurement, there is a problem that a lot of inconvenience occurs in the test because it becomes cumbersome during measurement and requires a lot of measurement time.

The present invention was devised to solve the problems of the prior art operating as described above, by using a test apparatus and a control program to suppress the human hand operation as much as possible when testing the sensitivity of the high-frequency wireless performance of the WLL system It is an object of the present invention to provide a wideband code division multiple access base station test apparatus and a control method of the test apparatus to prevent mistakes in advance and to simplify the test method and procedure and to increase the accuracy and reliability of the test results.

1 is a block diagram of a transmission and reception path between a base station and a terminal station for verifying a conventional high frequency performance.

2 is an overall configuration diagram according to the present invention.

3 is a detailed view of the control hardware shown in FIG.

4 is an implementation screen diagram according to the operation of FIG. 3.

5 is a detailed view of a transmission path attenuator control screen diagram of FIG. 4;

FIG. 6 is a detailed view of a reception path attenuator control screen diagram of FIG. 4. FIG.

7 is a flowchart according to a control method of a broadband code division multiple access base station test apparatus according to the present invention;

<Explanation of symbols for main parts of drawing>

10, 500: base station 20, 30: variable step attenuator

40, 400: terminal station 100: test apparatus

101, 102, 103, 104, 105, 106, 107: bidirectional divider

108: four-way distributor 110: first step attenuator

120: second step attenuator 130: duplexer

140: control hardware 141: buffer

142, 143: latch 144: control logic section

145, 147: Up button 146, 148: Down button

200: AWGN Generator 300: Spectrum Analyzer

410: BER tester 510: antenna ultra short

600: PC

An embodiment of a broadband code division multiple access base station test apparatus according to the present invention, which is designed to achieve the above object, includes: a test apparatus for controlling a transmission / reception path of a B-CDMA (Wideband CDMA) type WLL system; An AWGN generator and a spectrum analyzer, each of which is connected to the test apparatus through an additive white Gaussian noise (AWGN) port and a radio interface unit (RIU) port of the test apparatus, formed on the test apparatus. A RIU connected to a test device through an antenna port, a first common port formed on the test device, and a base station connected to a test device through a base station reception port (Radio Port: RP), and connected to the RIU to obtain a bit error rate. BER (Bit Error Rate) tester to measure, control hardware formed in the test device for control of the test device And consists of a PC (Personal Computer) for controlling said test apparatus through the control hardware.

In an embodiment of the invention, the test device is controlled by the control hardware and three signals input through three input ports formed on the test device for connecting the AWGN generator and the tester device. A four-way splitter that outputs a signal from the first step attenuator as a single signal and outputs it as one signal, receives the signal output by the four-way divider, divides it into two signals, and then transmits one to the second spectrum analyzer port. A duplexer which receives another signal among the signals distributed by the first bidirectional splitter and the first bidirectional splitter, sends and receives a signal with the RIU through the terminal station port, and outputs the duplexer and the signal output from the duplexer as two signals After division, one is sent to the RIU transmit port, which connects the spectrum analyzer to the test device. Another one is a second bidirectional splitter for transmitting to a first spectrum analyzer port, a third bidirectional splitter for outputting a signal input through two signal ports formed on the test apparatus as one, the first spectrum analyzer port and A fourth bidirectional splitter for generating one output signal from a signal input through a connected base station receiving port and a signal output from the third bidirectional splitter, one from an output signal of the fourth bidirectional splitter and a signal input from the control hardware A second bidirectional splitter for generating an output signal of the second step attenuator, a fifth bidirectional splitter for receiving an output signal from the second step attenuator and dividing the signal into two signals to output to two base station receiving ports formed on the test apparatus; Scene input through the first common port to connect with the test device A sixth bi-directional splitter for dividing and dividing a call into a first noise ratio port and a first noise port formed on the test apparatus, and receiving a signal outputted through the first ratio port of the noise ratio to the first step attenuator And a seventh bi-directional splitter for distributing a signal input through a base station transmission port formed on the transmitting test device and a second common port formed on the test device to a second noise port and a noise ratio to a carrier; do.

In addition, in the present embodiment, the control hardware is a first register composed of a buffer connected in correspondence with the input data in a 1: 1 manner, and a D flip-flop connected in series with the buffer and controlled to store a pulse. A latch, a latch which is a second register consisting of a D flip-flop connected and controlled in parallel with the latch which is the first register and storing a pulse, and inside each latch to control the latch which is the first and second registers. It is configured to include a control logic unit connected to an existing clock.

An embodiment of a control method of a broadband code division multiple access base station test apparatus according to the present invention comprises the steps of: setting measurement equipment to a test apparatus, making the setting and connecting a test apparatus and a PC, and after connecting with the PC Executing a window program, opening a transmission / reception attenuator control window by executing the window program, clicking a button of the opened window, and connecting the printer port of the PC and data input of the buffer by clicking the button. Storing a pulse corresponding to the connection in a latch; controlling the stored data in a control logic unit; enabling the controlled data to determine an output; and determining the output to be the first Supplied to the step attenuator to vary the forward and reverse paths.

In an embodiment of the present invention, the step of clicking the button of the open window includes the step of increasing by 0.5dB step when clicking the [Up] button and decreasing by 0.5dB step by clicking the decrease [Down] button. do.

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

After setting the initial environment of the test apparatus 100, the present invention measures values such as cable loss and path loss related to the test, fixed attenuation used, variable attenuation value, and the like. Then, after inputting the respective values into the program and proceeding the test according to the test procedure, it automatically controls the instruments 200 and 300 used for the test. Then, the output power of the terminal station is read to calculate the reception sensitivity of the system. Calculate and display the value on the screen so that the reception sensitivity can be easily obtained.

2 is an overall configuration diagram according to the present invention. As shown in the drawing, a test device 100 capable of controlling a transmission / reception path, that is, a forward and a reverse channel, of a BLL-CDMA WLL system and an addition device, which is a measurement device set in the test device 100, are added. An Additive White Gaussian Noise (AWGN) generator 200, a spectrum analyzer 300, a Radio Interface Unit (RIU) 400 connected to a port of the test device 100, and an RP. (Radio Port) 500, the BER tester 410 and PC (Personal Computer) 600 is connected to the RIU 400 to measure the bit error rate.

The test apparatus 100 includes a bidirectional distributor 101, 102, 103, 104, 105, 106, 107, a four-way distributor 108, a first step attenuator 110, The second step attenuator 120, the duplexer 130, and the test device 100 and the PC 600 are connected to control the first step attenuator 110 and the second step attenuator 120 of the test device 100. It consists of control hardware 140.

The antenna front end unit (AFEU) 510 in the RP 500 is connected to the test apparatus 100. Also, a configuration diagram of the control hardware 140 is illustrated in FIG. 3.

As shown in FIG. 3, buffers 74HC244 and 141 connected 1: 1 to the data line 8 bits of the printer port of the PC 600 and the data inputs 1 to 7, and the D flip to store the pulses. A latch 74HC374, 142, 143, which is a register constituted by a flop, and a control logic unit 144 for controlling the latches 142,143. The operation and effects thereof will be described in detail with reference to FIGS. 2 to 7.

As shown in FIG. 2, the AWGN generator 200 and the spectrum analyzer, which are measuring equipments, are provided in the test apparatus 100 so as to control transmission / reception paths which are forward and reverse channels of the B-CDMA WLL system. (300) is set. Then, the test apparatus 100 and the PC 600 are connected to execute a window program that can control transmission / reception attenuation as shown in FIG. 4.

As shown in the detailed screens shown in FIGS. 5 and 6 by the execution of the window program, a window for controlling the variation of the transmission and reception paths is shown. Thus, it is possible to adjust the attenuation of the transmission and reception paths through the mouse or the keyboard by using the illustrated window.

And the control hardware 140 shown in FIG. 3 controls the 1st step attenuator 110 and the 2nd step attenuator 120 of each test apparatus 100 by the program which controls attenuation amount.

The transmission path attenuator control screen diagram shown in FIG. 5 is configured to be able to vary the first step attenuator 110 of the forward channel of FIG. Therefore, when the user clicks the up button 145 with the mouse or presses the U key on the keyboard, the user increases by 0.5 dB steps.

On the other hand, when the user clicks the down button 146 with the mouse or presses the D key on the keyboard, it decreases by 0.5 dB steps. At this time, the data line 8 bits (No. 2 to No. 9 pins) of the printer port (parallel port 25-pin D-sub connector) of the PC 600 and the data input IN 1 to No. 7 of the buffer 141 of FIG. 3 are 1: 1. Each time the up or down button is pressed, the corresponding one bit is incremented or decremented, and the corresponding pulse is latched when it is input to IN 1 to 8 of FIG. The control inputs of the latches 142 and 143 are enabled by the control logic unit 144 which is stored in the (142) and 143 and controls the latches 142 and 143 to output the outputs ATT_1 to 8. This 8421 code format is determined and supplied to the first step attenuator 110 to vary the path of the forward channel.

The reception path attenuator control screen shown in FIG. 6 also operates in the same way as the transmission path attenuator control screen. In addition, the input IN 8 of the buffer 141 illustrated in FIG. 3 allows the first step attenuator 110 and the second step attenuator 120, which are transmission and reception paths, to be separately controlled, and latches 142 and 143. Control signal.

7 is a flowchart illustrating a control method of a broadband code division multiple access base station test apparatus according to the present invention. As shown therein, the measurement apparatus 200 and 300 are set in the test apparatus 100 (s1), and the test apparatus 100 and the PC 600 are connected (s2).

After the connection is executed, the window program is executed (s3), and the transmission / reception attenuator control window is opened by the execution of the program (s4). Then, the buttons 145, 146, 147 and 148 of the open transmission / reception attenuator control window are clicked (s5), and the printer port of the PC 600 and the data input of the buffer 141 are connected (s6). .

When connected, the corresponding pulse is stored in the latches 142 and 143 (s7), and the stored data is controlled by the control logic unit 144 (s8). When the controlled data is enabled to determine the output (s9), the determined output is supplied to the first step attenuator 110 to vary the forward and reverse paths (s10).

As described in detail above, the present invention devises a hardware device and a software program for controlling the hardware device for reliably testing the forward / receive channels, which are forward and reverse channels, between a base station and a terminal station in a B-CDMA WLL system. This increases the efficiency of the WLL test and makes it easier to obtain reception sensitivity.

Claims (5)

A test apparatus for controlling a transmission / reception path of a B-CDMA (Wideband CDMA) type WLL system; An AWGN generator and a spectrum analyzer, each of which is a measurement device connected to the test device through an additive white Gaussian noise (AWGN) port and a radio interface unit (RIU) port of the test device; A RIU connected to the test device through an antenna port formed on the test device; A base station connected to the test apparatus through a first common port and a base station receiving port formed on the test apparatus; A Bit Error Rate (BER) tester connected to the RIU to measure a bit error rate; Control hardware formed in the test device for control of the test device; And And a personal computer (PC) for controlling the test device through the control hardware. The method of claim 1, wherein the test device, Three signals input through three input ports formed on the test apparatus for connecting the AWGN generator and the tester apparatus, and a signal by a first step attenuator controlled by the control hardware as one input terminal. A four-way splitter for outputting a signal; A first bidirectional splitter which receives a signal output by the four-way splitter and divides the signal into two signals and transmits one to a second spectrum analyzer port; A duplexer which receives another signal among the signals distributed by the first bidirectional splitter, exchanges a signal with the RIU through the terminal station port, and outputs the signal; A second bidirectional splitter for dividing the signal output from the duplexer into two and sending one to the RIU transmit port connecting the spectrum analyzer to the test device and the other to the first spectrum analyzer port; A third bidirectional splitter for outputting a signal input through two signal ports formed on the test apparatus into one; A fourth bidirectional divider configured to generate one output signal from a signal input through a base station receive port connected to the first spectrum analyzer port and a signal output from the third bidirectional divider; A second step attenuator for generating one output signal from an output signal of the fourth bidirectional divider and a signal input from the control hardware; A fifth bidirectional splitter which receives the output signal from the second step attenuator and divides the signal into two signals and outputs the two signals to two base station receiving ports formed on the test apparatus; A sixth bidirectional splitter for dividing and distributing a signal input through the first common port connecting the base station to the test apparatus into a first noise port and a first noise port in a carrier-to-noise ratio formed on the test apparatus; A base station transmission port formed on the test apparatus for receiving a signal output through the first port based on a noise-to-noise ratio and transmitting the signal to the first step attenuator; And a seventh bidirectional divider for distributing a signal input through a second common port formed on the test apparatus to a second noise port and a second noise ratio to a carrier wave. The method of claim 2, wherein the control hardware, A buffer connected to the input data in a 1: 1 correspondence; A latch which is a first register connected in series with the buffer and controlled by a D flip-flop for storing a pulse; A latch, the second register being configured to be controlled in parallel with the latch as the first register and configured as a D flip-flop to store a pulse; And And a control logic unit connected to a clock present in each latch to control the latches of the first and second registers. Setting metrology equipment in the test apparatus; Connecting a PC to the test device after the setting; Executing a window program; Opening a transmission / reception attenuator control window by executing the window program; Inputting a variable degree of a transmission / reception path through the transmission / reception attenuator control window; Connecting the printer port of the PC and a data input of a buffer when the variable degree is input; Storing corresponding data in a latch; Controlling the stored data by a control logic unit; Enabling the controlled data to determine an output; And And supplying the determined output to the first step attenuator to vary the forward and reverse paths. 5. The method of claim 4, wherein the step of inputting a variable degree for the transmission / reception path through the transmission / reception attenuator control window is increased by 0.5 dB when clicking the up button in the transmission / reception attenuator control window. A method for controlling a wideband code division multiple access base station test apparatus comprising the step of decreasing the step by 0.5 dB when clicking the down button.