KR19990047899A - Experimental apparatus for performance and propagation environment of base station using CDA cellular / CS terminal - Google Patents

Abstract

The present invention can measure the base station and the radio wave environment of a plurality of operators in a single measuring equipment in real time, and also can be measured while moving the equipment mounted on the vehicle, the environment by moving people in the room using a battery The device can include a central processing unit, a ROM, a RAM, and a data storage device respectively connected to the central processing unit, and a ROM includes a program necessary for operating the system, and the data storage device is configured according to a test result. It includes a storage device for storing data on the performance of the base station and the propagation environment.

Description

Experimental apparatus for performance and propagation environment of base station using CDMA DCS / PCS terminal

1 is an overall system configuration of the present invention,

2 is a flowchart for a main routine stored in a ROM,

3 is a flowchart of a subroutine showing a process of setting plan loading stored in a ROM.

4 is a flowchart of a subroutine representing a set operation process stored in a ROM.

5 is a flowchart for a subroutine showing a test procedure stored in a ROM,

6 is a flowchart for a subroutine showing the plan loading process stored in the ROM.

[Purpose of invention]

[Technical field to which the invention belongs and the prior art in that field]

The present invention relates to an apparatus and method for testing the performance of a CDMA DCS / PCS base station, and more particularly to an apparatus for testing the performance and propagation environment of a base station using a DMA DCS / PCS terminal.

Currently, several methods are used to evaluate the performance of base stations and optimize the propagation environment in CDMA DCS / PCS systems. One of these methods is a method of performing a direct test call while moving a location with a CDMA DCS / PCS terminal in a radio environment of a base station, and collecting and recording data analyzed according to the test call at the base station. However, this method has the disadvantage of taking time to collect data and inaccurate data.

Accordingly, an object of the present invention is to provide a system and a method for measuring in real time the base station and the radio wave environment of a plurality of operators with one measuring device.

Another object of the present invention is to provide a system and a method for measuring in real time the base station and the radio wave environment of a plurality of operators as a measuring device that can measure while moving the equipment mounted on the vehicle.

Another object of the present invention is to measure in real time the base station and the radio wave environment of a plurality of operators with a single measuring equipment, to extract and store various parameters of the CDMA system to analyze the data through DATA POST PROCESSING The present invention provides a system and method for allowing an operator to monitor the current system in real time by connecting to the same personal computer and outputting the state under test on a screen.

[Configuration and Function of Invention]

The present invention includes a CPU (Central Processing Unit, or " CPU ") and a ROM, a RAM, and a data storage device respectively connected to the CPU. The ROM includes a program necessary for operating the system and stores data. The device stores data on the performance and propagation environment of the base station according to the test results. The data storage device is a F MEMORY, a magnetic disk, or a magnetic tape and a recording medium which can store and erase data.

A controller is connected to the CPU, and a plurality of portable mobile communication terminals, for example, PCS terminals, are attached to the controller, and a function key is connected to the controller.

The CPU is also connected to a display, speaker, buzzer, microphone and LED to perform each function. Portable computers, such as notebook computers, are configured to be connected to the CPU.

The device according to the present invention extracts and stores various RDMA meters of the CDMA using a terminal for performance and field optimization of the CDMA system, and analyzes the data through Data Post Processing and outputs the state under test on the screen. Monitor, monitor, and test the current system status in real time. The system of the present invention is used for a CDMA System Fie1d Test Tool, a CDMA System Call Ouality Test, and an RF Quality Monitor.

For this purpose, the measurement of each parameter to be measured by the system of the present invention is as follows.

1.Measurement of Pilot / Finger Signal Strength

The most important factor in determining the service area and service radius in the CDMA network is the signal strength of the pilot transmitted from each base station. Therefore, the pilot's reception strength measured by the searcher operation of the terminal should be collected by the pilot of the cell currently being serviced.

[EmDM measurement method]

1) Call waiting state

Calculate and output Ec / 1o by measuring Paging Channel Signal Strength of Finger locked in Active Service Cell.

2) busy state

The signal strength of the finger locked in the traffic channel of the active cell in the call is measured and calculated. If Sifter / Soft Hand is OFF, up to 3 Finger Eb / No is calculated and output.

2) Pilot Set Data Measurement

EmDM can measure up to 32PN of Pilot.

The values of each pilot are managed in the form used when the mobile sends a Pilot Strength Measurement Message.

Up to 3 active sets can be measured

Candidate set determined by parameter

Neighbor Set is determined by parameter

The sum of Active Set + Candidate + Neighbor Set should not exceed 32.

3) RSSI, TX power, Power adjust data Measurement

Receiving field strength and power adjustment for power control in CDMA networks are important data to be measured in CDMA system. The signal received at the mobile station is changed by the following path loss and fading.

RSSI Measurement of EmDM

EmDM measures the strength of the received In-Band signal, including the mobile station receiver antenna. An AGC (Automatic Gain Control) loop circuit operates to equalize the strength of the received signal at the end of the receiving modem. In this loop, the mobile station can measure the received power strength of the antenna receiver. In general, the measurement range is about -100 bBm to -20bBm.

Since the strength of the transmission signal is determined by the closed loop power control since the measurement of the mobile station transmission output is started, the transmission output can be known by measuring Tx Gain Adjust.

The Tx Gain Adjust at the mobile station is as follows.

Transmit output [bBm = Received power [bBm -73

+ Nor_Pwr [bB]

+ Init_Pwr [bB]

+ The Sum of All Acess Probe Correction [bB]

+ The Sum of All c1osed loop power Correction [bB]

(3) CLMA data logging

(4) System status trace & processing

(5) Location tracking (position data logging with GPS)

(6) Mobile information

(7) Auto call test

(8) Finger & Searcher data display

(9) Logging Mask

(10) Dip Switch Mask

(11) Handset Emulation

(12) Mobile event message disp1ay

(13) CDMA Common Air Interface (CAI) massage & parament display

The present invention will be described with reference to the accompanying drawings.

Figure 1 is the overall system configuration of the present invention, Figure 2 is a flowchart for the main routine stored in the ROM, Figure 3 is a flowchart for the subroutine showing the setting process of the plan loading stored in the ROM, Figure 4 is a ROM FIG. 5 is a flowchart for a subroutine representing a test procedure stored in a ROM, and FIG. 6 is a flowchart for a subroutine representing a plan loading process stored in a ROM. It is a chart.

First, referring to FIG. 1, the CPU 12 includes a ROM 28 having a program necessary for operating a system, a RAM 30 temporarily storing a signal or data necessary for performing function reading of the CPU 12, And a F MEMORY 32 for storing data on the performance and propagation environment of the base station according to the test result.

A controller that transmits a signal to a terminal according to the control operation of the CPU 12, receives a signal from the terminal, transmits the signal to the CPU 12, and transmits a selection control signal of the connected function key 48 to the CPU 12. 18 is connected to the CPU 12.

When power is applied, the CPU 12 operates according to the program of FIG. 2 stored in the ROM 28. First, the process proceeds from the start block 101 to the port initialization block 103 of the CPU to initialize each port. Next, proceed to block 105 to initialize the internal data.

Then, LCD initialization is performed (block 107), debug command registration is performed (block 109), and plan loading is performed. The execution of plan loading (block 111) is described next. After performing Plan Loading, the operation of the CPU is checked (block 113), the tone detection chip is initialized (block 115), and the registered operation is performed (block 117). The performance of the registered operation is described next. The test procedure is then performed (block 119). This test procedure is described next.

Plan loading is performed by the subroutine of FIG. 3, which causes initialization of the LCD 18 to be performed, and Debug Comnnnd is registered, and then proceeds to block 111 to perform plan loading. Check (block 301). First, it is determined whether or not the menu key (block 303), and if the menu key is output (block 305), the process proceeds to block 307 to return to the main routine. If it is not the menu key, it is determined whether it is the F1 key (block 309), and if the F1 key is selected (block 311), the process proceeds to block 307 to return to the main routine.

If it is not the F1 key, it is determined whether it is the F2 key (block 313). If the F2 key is pressed, the test is started (block 315), and the process proceeds to block 307 to return to the main routine.

If it is not the F2 key, it is determined whether it is the F3 key (block 317). If the F3 key is displayed, PN and Echo are displayed (block 319), and then the process proceeds to block 307 to return to the main routine. If the key is not F3, it is determined whether the key is F4 (block 321). If the key is F4, the test ends (block 323), and the process proceeds to block 307 to return to the main routine.

If it is not the F4 key, it is determined whether the F5 key is used (block 325). If the F5 key is used, the memory is deleted (block 327), and then the process proceeds to block 307 to return to the main routine. If it is not the F5 key, it is determined whether the F6 key is used (block 329). If the F6 key is used, the test plan is displayed (block 331), and the process proceeds to block 307 to return to the main routine. If it is not the F6 key, determine whether it is the F7 key (block 333); if the F7 key determines whether it is being tested (show block PN and Echo (block 335), then perform the float function (block 337); Proceed to step 307 and return to the main routine. If not in block 335, make the current plan the same as the existing measurement (block 339), then proceed to block 307 and return to the main routine. Determine if F8 is key (block 341), if F8 is key, perform GPS related operation (block 343), and proceed to block 307. If not, press F9 key (block 345) and F9 key. If it is, then it is determined whether it is being tested (block 347), if it is under test, the function selection is deleted (block 349), and the process proceeds to block 307. If it is not under test at block 347, the test is paused. Proceed to block 307 and return to the main routine.

The process of performing the registered operation is performed by the subroutine of FIG. 4. When the process proceeds to block 117, which is the process of performing the block registered operation in the main routine, the TA graph request is first transmitted (block 401), and the pilot request transmission ( Block 403), Status request transmission (block 405), and Log Mask request transmission (block 407) are performed respectively, and then displayed on the LCD (block 409). Then check the memory size (block 411), get the distance and time from the GPS (block 413), and then get the TA information, the graph information, Status, PN (blocks 415, 417, 419). Check the function key (block 421), perform the queued work (block 423), receive the RX message (block 425), save the packet to the personal computer if requested (block 427), and count the tones. Then (block 429), return to the main routine (block 431).

The following describes the test process. Proceeding from the main routine to block 119, the main routine proceeds to the subroutine of FIG. 5 to perform a call test transaction (block 501).

The test proceeds to block 501, waiting for the start time (block 503), preparing to call test and after a certain time has elapsed, and starts the call (block 507).

When the call is initiated, it initializes the various variables (block 509), determines whether an ACCESS-ORIG page message is detected (block 511), and if so, determines whether to allocate a channel (block 513), if an ACCESS-ORIG page message. If is not detected or if no channel is assigned, repeat this process until it is detected. If a channel is allocated (block 513), a BASE STATlON-request message is detected across block 515 (block 517) and if not detected, it is repeated until detected, and if detected, the base station order is processed (block 519), then Proceed to step. In the next step, it is determined whether the order message 1 of the terminal 1 is detected (block 521), if not detected, it is repeated until it is detected, and if it is not detected (block 523), it is repeated until it is detected. If detected, process the service option (block 525) and then proceed to step. In the next step, the allocation information message is detected (block 527), if not detected, is repeated until it is detected, if detected, the allocation information message is processed (block 529), and the flow proceeds to the next step. In the next step, the message of terminal 2 is detected (block 531) and if not detected, it is repeated until it is detected, if detected, release order detection is detected (block 533), the release order is processed (block 535), and the call counter expires. (Block 537), if not expired, return to block 507 and repeat the above process; if expired, terminate the call test (block 539), terminate the test (block 541), then Return to the routine (block 543).

The plan loading process in the main routine is as follows.

First, in the main routine, block 111 is composed of the subroutine of FIG. 6, and when the user prepares the test setup (block 601), the state of the terminal is checked (block 605). At this time, various experiment setting data is loaded into the RAM (30). If it is determined whether or not a new experiment is set (block 607), the set new terminal is selected (block 611), and if not set, previously stored plan data is enumerated (block 609). If a new terminal is selected in block 611, it is determined which terminal among the plurality of terminals (block 613) sets various parameters according to it (block 615), and then it is determined whether the plan is clear. If the plan is cleared, return to block 613 to select a new terminal. Repeat the procedure. If the plan is cleared, set up the plan (block 621), then determine whether to save the plan data (block 625), and save it accordingly (block 623). If not, load the plan (block 627) and return to the main routine to complete the experiment.

[Effects of the Invention]

As described above, the present invention can measure the base stations and the radio wave environment of a plurality of operators in one measuring device in real time, and can also measure while moving the equipment mounted in a vehicle, and move a person indoors using a battery. It has the advantage of being able to measure. Furthermore, it extracts and stores various parameters of the CDMA system and analyzes it through DATA POST PROCESSING, and outputs the status under test by connecting a NOTE-PC to the operator, so that the operator can monitor the current system in real time. have.

Claims (1)

It includes a central processing unit, ROM, RAM, and data storage device connected to the central processing unit, and the ROM includes a program necessary for operating the system, and the data storage device includes performance and propagation environment of the base station according to the test results. Test equipment for performance and propagation environment optimization of base station using CDMA DCS / PCS terminal including storage device for data storage