KR0139727B1 - Cdma automatic call simulator - Google Patents

Abstract

The present invention relates to an automatic call test apparatus for testing call processing capacity and performance between a base station and a mobile station in a CDMA mobile communication system, comprising: a connection station (2) and a mobile station connected through a communication port; A connecting device (2) having a connecting terminal externally mounted to connect a mobile station and an operating device; and controlling all mobile stations by internal operating software, and outputting the status of each mobile station and test result during the test. After the test is completed, it characterized in that the operating device (3) for recording the result data in a file.

According to the present invention as described above there is an effect that can automatically test the call processing performance and the capacity of the base station between the base station and the mobile station.

Description

Code Division Multiple Access Automatic Call Simulator

1 is a block diagram of an MCS-2 for applying the present invention.

2 is a flowchart of a call control mode according to the present invention.

3 shows the operational status of all 32 mobile stations under test.

* Explanation of symbols for main parts of the drawings

1: Mobile station 2: Connection device

3: Operating device PC

The present invention relates to a test apparatus necessary for testing call processing capacity and performance between a base station and a mobile station in a CDMA mobile communication system.

This capacity and performance test is carried out through repeated call attempts with the maximum mobile station corresponding to the capacity of the base station, that is, the maximum load test for the base station. This load test is divided into call processing performance test and characteristic parameter measurement test. The call processing test is divided into call processing performance test and characteristic parameter measurement test.

Call processing performance test refers to testing the performance of the system for multiple calls and evaluating the stability of the system through repeated call attempts. Say that to evaluate.

In order to perform the call processing performance test, a number of subscribers must simultaneously perform long time trials, and as a result, a lot of manpower is actually input, and statistical data is difficult to calculate.

Accordingly, an object of the present invention is to provide a CDMA automatic call test apparatus capable of automatically testing call processing performance and capacity between a base station and a mobile station in a CDMA mobile communication system.

In order to achieve the above object, the present invention provides a device for testing call processing capacity and performance between a base station and a plurality of mobile stations in a CDMA mobile communication system, and has a communication port for serial communication with an external device. The connection device 2 and the mobile station 1 connected through the communication port; and a connection terminal of the PC (operation device) and a plurality of the mobile stations are externally mounted, and a self-power supply is built in. A connection device (2) mounted in a metal box so as not to be affected by external electromagnetic waves; and an operating software operating therein to control the plurality of mobile stations to make a synchronous / asynchronous call during the test. It is characterized in that it comprises an operating device (3) for outputting the status of each mobile station and the test result during the test, and recording the result data in a file after the test is completed.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a configuration diagram of an embodiment of the present invention, which is comprised of a mobile station 1, a connecting device 2, and an operating device PC 3. As shown in FIG.

In Fig. 1, a mobile station (MS) 1 means a mobile station, and uses a CDMA vehicle type telephone of essential products.

This vehicle-type telephone has a 25-pin communication port for serial communication with an external device, and the connection device 2 and the mobile station 1 are connected through this communication port.

The connecting device 2 is equipped with one connection terminal with a PC and 32 connection terminals with a mobile station, a built-in power supply, and is mounted in a metal box so as not to be affected by external electromagnetic waves. . On the front of the connection device, an LED indicating the status of each of the 32 mobile stations is attached, thereby displaying the status of the mobile station.

In addition, there is a reset terminal for all 32 mobile stations on the front of the connecting device, and when pressed, all mobile stations and connecting devices are initialized. The connecting device 2 is divided into a control printed board assembly (hereinafter abbreviated as PBA) and a mobile station connecting PBA.

The control PBA is connected to the operating device 3 and the PBA for mobile station connection is connected to the mobile station 1. In order to reduce the size of the connection device, eight mobile stations are connected to one PBA for mobile station connection. In this case, it is economical because the PBA for mobile station connection can be mounted according to the number of mobile stations to be connected.

The connection device 2 is equipped with a CPU and a storage device to reduce the load on the operating device PC 3 as much as possible. This allows the operating device PC 3 to control each mobile station and collect PC screen display and statistical data of each mobile station state. Try to be processed in real time as possible.

In a general IBM PC used as the operating device 3, an interface card is mounted in a slot inside the PC and connected to the connecting device. The access card installed in the PC slot communicates with the control PBA in the access device via RS-422. The communication speed at this time is 57.4 Kbps.

The operating software running on the PC (3), the operating device, controls all mobile stations through the PC, outputs the status of each mobile station and the test results on the PC screen during the test, and records the result data in a file on the PC after the test is completed. . In addition, the operating software performs the necessary analysis using the test result data file recorded on the PC to find out the overall operation status, operation status of each mobile station, test result, cause of failure and time of failure, and also records the test condition data in the file. .

The operating software is divided into the ready mode → operation mode → analysis mode. Hereinafter, each mode will be described.

First, the setup mode is a mode for setting test conditions. The setup conditions are as follows.

Test time (start time, end time) or total number of tests

· Selection of sending or receiving test mobile station number, telephone number, and telephone number

Standby and talk time in call control mode

Measurement CDMA Parameter Types

Synchronous or asynchronous

Types of tones

Antenna Tx attenuation level by mobile station

Preliminary and post-test continuous operation time

Operation Mode is the mode that the device actually tests according to the set test conditions. The main functions in this mode are the preparation mode setting condition screen display and the test result screen display from the start of the test to the present (total test results and test results by mobile station).

Analysis Mode is a mode in which the test results data file recorded on the hard disk is analyzed after completion of the test. This mode has the functions of analyzing the entire mobile station test results, analyzing individual test results, and analyzing the test results by failure cause.

In Mobile-Mobile, two mobile stations (Rx-Tx) can be operated separately regardless of the operation of other mobile stations.

The detailed description of each mode is as follows.

First, the operation of the preparation mode will be described.

The preparation mode is a mode in which MCS-2 test parameters are set before the operation of the call test. Control functions (telephone number, function keys) for each of the mobile station handsets are input processed via a PC keyboard or a mouse.

The preparation mode is responsible for a function of selecting a user in one of a transmission / reception mode arbitrarily for each mobile station, inputting a transmission / reception mobile station number, and performing (calling) and answering an actual call.

The Tx power gain level setting is made at 0-2 kHz intervals for each mobile station. With regard to Figure 2, during one cycle of the next normal call processing, call preparation and release periods will vary depending on the throughput of the measurement system and the load on the system. Can be set.

In each call processing, a failure may occur. If a failure occurs, a message corresponding to the cause of the failure is received by the mobile station and output to the PC, and the PC classifies it and performs statistical processing.

The user inputs a call duration and a pause period.

In addition, a random mode or a synchronous mode is selected, wherein the random mode is a mode in which each mobile station operates independently regardless of other mobile station operating states, and in the synchronous mode, all selected mobile stations simultaneously view a call. (Call Attempt) is executed and finished, that is, 32 mobile stations simultaneously press the call button in each call cycle. It also has the function of recording the preparation data in file form and reusing / modifying it for other tests.

The following describes the operation mode.

After entering test condition in ready mode, switch to operation mode by command key or function key. After switching to the operation mode, the mobile stations selected by MCS-2 start the call. The operation mode displays the operation status of each mobile station for each call processing process.

Display and record the corresponding base station / sector code number for each mobile station (sending and receiving) and for each call.

Measure data of Rx / Tx power level (m), power adjustment level, Ec / Io, FER, number of fingers, delay time, base station code once during call and standby period and display it on the screen. And record.

Display the status of the test results for each mobile station (number of calls / number of failures / number of successes / high equipment rate)-data for each mobile station / MCS-2 total data-and save and record the data file.

Display and record the start time and completion time for each mobile station / house.

If a fault occurs during the processing-base station fault or mobile station fault separation-a message (base station or mobile station itself) on the cause of the fault is displayed and recorded on the screen for each door / mobile station.

When not in the logging state, the operation mode may be switched to the logging state. During the operation mode, the screen is switched to the initial screen by the reset command, and the test results are stored when the logging state is logging.

You can choose to save (log) the test results to a data file or not.

In addition, statistical data is grouped by mobile station / failure cause / failure time zone for the failure of the total failure call and displayed on the screen and recorded.

The following describes the operation of the analysis mode. The analysis mode is a mode in which the analysis of the test results and the processing of the analysis results are performed after completing the test. Test conditions Prepare Print and print the data on the screen.

All test data files recorded in the operation mode are analyzed and printed on the PC screen.

Classify and process statistical data by failure cause.

A graph of the failure rate by mobile station / overall mobile station test period is made. Process statistics on the call setup time distribution. Statistics on Rx Power, FER, and Eb / No Great Lake Failure rates are processed. At the same time, the measurement data obtained from the same base station is synthesized and statistically processed.

Comprehensive analysis of each test data is made by comparing several test data and a graph is drawn.

Print out all the recorded data (monochrome and print).

As a main function of the embodiment of the present invention as described above, it connects 32 mobile stations (CDMA vehicle type telephone), selects and sets the telephone by transmission and reception, call idle time and traffic time for each mobile station. Time) is arbitrarily set, the test period or number of test calls is arbitrarily set, and a synchronous mode call or an asynchronous mode call is generated, and a mobile-to-mobile call and a mobile-to-land. It can handle three kinds of call, Land-to-Land call, generate four tones during the talk time, detect transmit and receive tones, record and analyze the message of the cause of failure in case of failure. It generates the call call data and transmits / receives arbitrary data, records and analyzes CDMA parameters, adjusts the Tx power gain for each mobile station, the number of calls under test, the number of failures, and the success rate. Collect and display statistical data, Stores high statistical data files and analyzes them by mobile station and failure cause.

2 is a call control flowchart according to the present invention.

As shown in FIG. 2, the control is performed in the order of Call Setup, Traffic, Release, and Idle for the Nth call.

Hereinafter, each of the control states will be described in detail. First, the operation of the call preparation period will be described.

Call preparation period means paging state and ringing state, and after pressing SND button, ringing / ring back tone occurs until the call line is connected. In time, it depends on the DCN system throughput.

If the system fails to process (call ready) within the specified time, the call fails according to the mobile station time-out.

In this case, call failure occurs even when an error message is not received from the base station. If a message for establishing a call is not received from the base station, the call fails.

In this case, record an error message and switch to standby. In normal cases, record the call preparation period.

Hereinafter, the operation of the traffic state will be described.

The call duration refers to the duration of the call from the time when the call is started by pressing SND to the end of the call by pressing END after ringing (Rx mobile station), and is arbitrarily input by the MCS-2 user.

The call mode of MCS-2 can be selected by operating in three modes: real voice (conversation), Markov call, and call. If a failure occurs in this mode and the call cannot be made from the beginning, or if the call is interrupted within the specified call time, the cause is recorded and the standby state is switched.

Displays and saves the frame error rate (FER) during a call.

In the Markoff mode, the sender and the receiver transmit the Markov data to the base station, respectively, and carry data of an actual call state on the forward and reverse links.

In the tone mode, a tone of a certain frequency and level is generated and transmitted to the other party, and the quality of the call is measured by measuring the frequency and level of the tone received by both mobile stations, and displaying and recording it.

The tone is selected by the user from a single frequency to four frequencies, and the duration of each frequency can also be determined and tested.

If the received tone is different from the reference frequency and reference level, it is displayed and recorded.

Hereinafter, the operation of the release state will be described.

The release period means the time from when the end button is pressed to the standby state, and the end button is pressed by the transmitting mobile station first, and the receiver presses the end button.

This time depends on the DCN system throughput. Anyone can send or receive, but in MCS-2, the sender takes care of this.

After pressing the end button, confirm that the timeout function is released within a predetermined time, and if a failure occurs in this mode, the mobile station is repeatedly put in standby mode and the state is recorded.

Hereinafter, the idle state will be described.

The waiting period is the time of waiting for a call after the call is completed, and MCS-2 has a function for random input.

The test call control will be described with reference to FIG. 3 attached to the operation states of all 32 mobile stations under test described above.

Idle State

After call release is completed, it means waiting time of call until the next call.

Paging State

After transmitting a Call Origination Message to a mobile station, it indicates the state until a ring back tone occurs in the mobile station.

Ringing State

The ring back tone generated by the mobile station is detected and the ring back tone is maintained for a predetermined time. When the tone transmitted from the incoming mobile station is transmitted or the ring back tone is maintained, and the tone transmitted from the incoming mobile station is transmitted or the reception of the ring back tone is stopped, the state transitions to the traffic state.

◆ Traffic (Conversation) State

The call duration refers to the duration of the call from the time when the called party starts the call to the time when the call ends. The duration is determined by the user's definition.

◆ Release State

It is a state until a call end command is transmitted to a mobile station in a state in which the call duration has ended, and the mobile station changes to the state in which the call is terminated.

The handling procedure for the call test and the processing method of the call test result are as follows.

All call results are processed when each call ends and is released.

◆ The result processing of the calling mobile station and the result processing of the incoming call mobile station are processed separately.

◆ The call test result of mobile station is divided into the number of successful call, No Service Error, call setup failure, call disconnection during call, no answer and bad call condition.

◆ Type of call test result of incoming call mobile station is classified into incoming call success, bad call condition and no reception tone.

◆ Types of Ho Exam Results

-. Call origination success means that the call quality is good while the mobile station maintains the call in the traffic state for a specified time. No Service Error is treated as a service failure if No Service is indicated in the message sent from the mobile station when the call is made. The call setup failure is treated as a call setup failure if a call failure is indicated in the message of the mobile station after a call origination attempt. Call Drop refers to a case in which the call is not maintained for a specified time while the call is in progress and the state of the mobile station is changed from the traffic state to the idle state during a normal call. Non-response refers to a case in which a ring back tone is continuously received for a predetermined time in a ringing state. Poor call status refers to a case in which the call proceeds normally but the call quality is poor.

As described in detail above, in the CDMA mobile communication system, in order to simultaneously test the CDMA characteristic parameters together with the call processing performance test, multiple subscribers should simultaneously call for a long time. Data is also difficult to calculate, but if the present invention is applied, there is an effect that can be automatically performed instead.

According to the present invention configured and operated as described above, it is possible to test the load of the system for testing mobile communication base station as a device for testing call processing performance and capacity, and for mobile station testing, call processing time for repetitive call views, Call success rate can be tested. That is, the call processing performance between the base station and the mobile station can be tested, and the base station capacity test can be automatically performed.

Claims (12)

An apparatus for testing call processing capacity and performance between a base station and a plurality of mobile stations in a CDMA mobile communication system, the apparatus having a communication port for serial communication with an external device and connected to the connection device 2 through this communication port. With the plurality of mobile stations 1 to be operated and the operating software operating inward, the predetermined plurality of mobile stations are controlled to perform synchronous / asynchronous calls during the test, and the state of each mobile station under test and the state of the test result are outputted. After completion of the test, the operating device (3) for recording the result data in a file, and the connection terminal between the operating device and the communication port of the mobile station are externally mounted, and its own power supply is built-in. And a connection device (2) mounted in a metal box so as not to be influenced by external electromagnetic waves and serving to connect the mobile station (1) and the operating device (3). CDMA automatic call test apparatus as. According to claim 1, CDMA automatic call test apparatus characterized in that the front of the connection device (2) is attached to the LED indicating the status for each of the mobile station to display the status of each mobile station through this. The CDMA automatic call test apparatus according to claim 2, wherein there is a reset terminal for the entire mobile station on the front surface of the connection device, and when pressed, all mobile stations and the connection device are initialized. The CDMA automatic call test according to claim 1, characterized in that the connection device (2) comprises a control printing fund assembly connected to the operating device (3) and a mobile station connection printing board assembly connected to the mobile station (1). Device. The CDMA automatic call test apparatus according to claim 4, wherein the connection device (2) allows several mobile stations to be connected to one sheet of a printed circuit board assembly for mobile station connection in order to reduce the size of the connection device. The apparatus (2) according to claim 5, wherein the connection device (2) has a cpu and a storage device to relieve the load on the operating device (3), whereby the operating device (3) displays screens of each mobile station control and the status of each mobile station and statistical data. CDMA automatic call test apparatus, characterized in that the collection is processed in real time. The CDMA automatic call test apparatus according to claim 1, wherein a connection card installed in an internal slot of the operating device (3) communicates with a control printed circuit board assembly in the connection device via RS-422. According to claim 1, The operating software of the operating device (3) performs the necessary analysis by using the test result data file recorded in the operating device (3), the overall operating state or each mobile station operating state, test results, failure causes and CDMA automatic call tester, characterized in that it detects the time of failure and writes the test condition data in a file. The test software according to claim 1, wherein the operating software comprises a preparation mode for setting a predetermined test condition, an operation mode in which the apparatus of the present invention performs an actual test according to the set test condition, and a test result recorded on the hard disk after completion of the test. CDMA automatic call test apparatus, characterized in that for operating in the analysis mode to perform a predetermined analysis using a data file. The CDMA automatic call test apparatus according to claim 9, wherein the operation mode displays a preparation mode setting condition and displays a total test result and a test result for each mobile station from the start of the test to the present. The CDMA automatic call test apparatus according to claim 9, wherein the analysis mode performs a function of analyzing all mobile station test results, analyzing individual test results, and analyzing test results for each cause of failure. The CDMA automatic call test apparatus according to claim 1, wherein in the case of a mobile-to-mobile call, two mobile stations can be operated separately regardless of the operation of other mobile stations.