KR20000013418U - Test equipment of base station wireless board in mobile communication system - Google Patents

Abstract

The present invention relates to a test apparatus for a wireless board for a base station in a mobile communication system that can be used in a variety of wireless boards to expand the range of test functions, depending on whether the system bus type is parallel or serial Extended test including a parallel bus interface or a backboard interface connection with a serial bus interface connector and a serial bus interface block that changes the parallel bus signals to the serial bus interface scheme in the case of a system configuration with the serial bus interface method. With the board; Memory block that stores and outputs data necessary for test control of wireless board, processor that reads data from memory block and stores necessary data, and is connected to personal computer using RS 232 interface cable and user communicates with main jig. It consists of a main jig that includes a monitor port used to connect to the expansion test board and a parallel bus interface connection used to interconnect parallel matched signals via a connector.

Description

Test equipment of base station wireless board in mobile communication system

The present invention relates to a test jig for wireless boards for mobile communication base stations. In particular, a test apparatus for a base station wireless board in a mobile communication system that expands the range of test functions by allowing the integrated use of various wireless boards. It is about.

Hereinafter, a test apparatus in a mobile communication system according to the related art will be described with reference to the accompanying drawings.

1 is a connection configuration diagram of a wireless board and a jig of the prior art.

2 is a jig connection configuration diagram in the conventional PLL control, and FIG. 3 is a jig connection configuration diagram in the amplification gain control in the prior art.

The test apparatus of the prior art is made separately according to the test purpose and connected to the base station wireless board if necessary to perform the desired test.

1 shows a connection configuration of a wireless board and a jig, in which a PLL control jig 4 and a gain control jig 3, which is a type of test apparatus, include a frequency conversion board 2 and a frequency conversion board 2 for a wireless base station. It is connected to the control board (1) for controlling each.

Here, the jig to be connected according to the test purpose of each test device may be changed.

And the function of each block will be described as follows.

First, the frequency conversion board 2 is a radio frequency up and down conversion board for converting a frequency (usually hundreds of MHz to several kHz) for communication with a mobile communication terminal in a mobile communication base station to a baseband frequency for IQ modulation. The control board 1 is a board for controlling the frequency conversion board 2, and usually has a built-in processor and has a parallel or serial interface specification.

The use of the gain control jig 3 and the PLL control jig 4 is used under the condition that the control board 1 malfunctions or does not operate normally.

Also, as shown in FIG. 2, the PLL control jig 4 uses an 8-bit controller (8751, etc.) 7 for data transmission with a PLL chip which usually uses a serial data transmission method, and additionally, a keypad 6 ) And the LCD module 5.

The gain control jig 3 includes a variable resistor 9 for controlling the CDMA signal transmission and reception gain in the frequency conversion board 2 and outputs a gain control signal to control the transmission / reception gain control block 10.

The test jig of the conventional wireless communication base station wireless board is configured separately for each function and the operation according to the function is as follows.

Fig. 2 shows a jig connection configuration during PLL control. The PLL control jig 4 uses an 8-bit controller 7 or the like for the PLL block 8 of the frequency conversion board 2 and the address, serial data, and serial. Send and receive clock and synchronous detection signals to control the PLL block (8) and check the lock status.

3 shows a jig connection configuration in gain control, and the gain control jig 3 uses a variable resistor 9 or the like to control the control voltage (usually 0 to 5 V) of the transmit / receive gain control block 10. When generated and transferred to the frequency conversion board 2, the transmit / receive gain control block 10 controls the gain of the transmit and receive power according to the received control voltage.

Such a test apparatus for a base station radio board of the prior art has the following problems.

First, there is no test extension, so there is no general purpose.

This is because different types of jigs must be prepared separately according to the test mode so that each test can be performed.

Second, only a small portion of the various test functions of wireless boards can be tested, making accuracy and reliability testing impossible.

This is because the test apparatus of the prior art has a limited function.

The present invention was devised to solve the problems of the wireless board test apparatus in the conventional mobile communication system, and the mobile communication system that has expanded the scope of the test function by being able to use various wireless boards integrally. In order to provide a test apparatus for a base station wireless board.

In the mobile communication system according to the present invention for achieving the above object, the test apparatus of the base station wireless board is a parallel bus interface connector or a connector of a parallel bus interface or a serial bus interface depending on whether the bus type of the system shape is parallel or serial. An extended test board including a back board interface connection to which the serial bus interface is applied and a serial bus interface block for converting the parallel bus signals to the serial bus interface method when the system configuration is applied to the serial bus interface; Memory block that stores and outputs data, Processor that reads data from memory block and stores necessary data, Connects to personal computer using RS 232 interface cable and user communicates with main jig. It is characterized by consisting of a main jig that includes a parallel bus interface connection that is connected via a connector to the monitor port and the extended test board used to mutually transmit parallel matching signals.

1 is a connection diagram of a wireless board and a jig of the prior art

2 is a jig connection configuration diagram of a conventional PLL control.

3 is a jig connection configuration diagram of amplification gain control in the prior art;

4 is a block diagram of the integrated jig according to the present invention

5 is a connection diagram of the integrated jig according to the present invention

Explanation of symbols for main parts of the drawings

41. Main Jig 42. Extended Test Board

43. Processor 44. 48. Parallel bus interface connection

45. Romans 46

47. Monitor port 49. Backboard interface connection

50. Serial Bus Interface Block 51. Back Board

52. Transmission power measuring board 53. Frequency conversion board

54. Power Pack 55. Personal Computer

Hereinafter, a test apparatus for a base station wireless board in a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a configuration block diagram of the integrated jig according to the present invention, Figure 5 is a connection configuration diagram of the integrated jig according to the present invention.

4 shows an integrated jig according to the present invention, and is composed of a main jig 41 and an extended test board 42 connected to each other by a connector.

The main jig 41 includes a ROM (Read Only Memory) 45 and a RAM 46 for storing and outputting data required for control, and data from the ROM 45 using a general purpose processor. Processor 43 for reading the data and storing necessary data in RAM 46, and a monitor port 47 that is connected to a personal computer using an RS 232 interface cable and used by the user to communicate with the main jig 41. And a parallel bus interface connected to the extended test board 42 through a connector and used to mutually transmit parallel matching signals including address, data, address stove, data stove, lead / right stove, and the like. The connection part 44 is comprised.

The extended test board 42 connected to the main jig 41 configured as described above is connected to the parallel bus interface connecting part 44 of the main jig 41 and the system bus type system. Depending on whether it is parallel or serial, the backboard interface connector 49 to which the connector of the parallel bus interface or the serial bus interface is applied and the system configuration of the system to which the serial bus interface is applied are changed so that the parallel bus signals are adapted to the serial bus interface method. The main includes a serial bus interface block 50.

Here, the monitor port 47 exchanges data with the processor 43 in the main jig 41 using a prepared jig program, a test jig ROM, or the like, and is used to control and control lower wireless boards.

The serial bus interface block 50 is used to convert the parallel interface data into the serial interface data and transmit it to the backboard interface connector 49. When implementing this in hardware, a commercially available FPGA (Filed Programmable Gate Array) is used.

Referring to the test operation of the test apparatus of the base station wireless board in the mobile communication system having the above configuration as follows.

Connection of the integrated jig according to the present invention is configured by connecting the expansion test board 42 to the main jig 41 in the control board position, as shown in FIG.

Thereafter, the personal computer 55 controls the frequency conversion board 53, the transmission power measurement board 52, and the like using a JIG software program prepared in advance.

In a specific test operation, the address and data input / output from the personal computer 55 are exchanged with the processor 43 in the integrated jig through a serial communication method of the RS232 interface.

The processor 43 in the integrated jig is matched with the extended test board 42 in a parallel communication manner to transmit a signal, and the extended test board 42 is again connected to the back board in the shelf according to each shape such as PCS or IMT2000. It is matched with an edge pin (Edge pin) and exchanges a control signal and a status check signal with the frequency conversion board 53 and the transmission power measurement board 52 through a back board.

As described above, the test apparatus according to the present invention can perform all the following functional tests through the integrated jig based on each shape, and the types of the functional tests are as follows.

SHELF BUS TEST, PLL FREQUENCY SYNTHESIZER LOCKING TEST, EEPROM WRITE AND READ TEST, D / A CONVERTER SET TO DESIRED VALUE TEST), THERMAL SENSOR READ TEST, STATUS AND TEST RESULT DISPLAY TEST, Debugging Test of A / D and D / A Converters (A / D & D / The test types can be divided into A CONVERTER DEBUG TEST and SERIAL DATA DEBUG TEST.

Each test function as described above is as follows.

First, the shelf bus test function checks whether the data and address signals are correctly transmitted to the frequency conversion board 53 and the transmission power measurement board 52 through an 8-bit parallel bus or serial bus generated by the integrated jig. to be.

The bus method between the integrated jig and the wireless boards may be parallel or serial. However, in the case of the serial type, the wireless bus is similar to the parallel / serial converter which converts the parallel bus signals from the processor 43 in the integrated jig to serial. Additional on-board serial / parallel converters are needed.

Such parallel / serial converters and serial / parallel converters can be implemented by using a field programmable array (FPGA), which is widely used.

The actual circuit operation is a test function that finds and corrects an error part by writing data at regular intervals from the lowest value (0x00: hexadecimal) of the digital data to the highest value (0xff: hexadecimal).

The PLL FREQUENCY SYNTHESIZER LOCKING TEST function performs the test operation as follows.

In the frequency conversion board 53 and the transmission power measurement board 52, it is necessary to convert a frequency (typically hundreds of MHz to several kHz) for communicating with a mobile communication terminal in a mobile communication base station to a baseband frequency for IQ modulation. Several local oscillators (PLL FREQUENCY SYNTHESIZER) are required, a test function that sets the frequency of this local oscillator and checks its locking status.

The data format used for frequency setting uses a serial data format. There are two types of data formats, the IIC method and the 3 WIRE method.

The PLL chip used uses the 3 WIRE method of clock, data, and enable. The operation is synchronized with the clock, and when the data is input to the PLL chip, the enable signal is finally controlled and the data is stored in a register inside the PLL IC. do.

When the PLL is locked, the PLL IC generates a locking signal, which is detected by a detection circuit in the wireless board, converted into digital data, and transmitted to the main jig 41.

The nonvolatile memory write and read test stores board calibration data in the transmit power measurement board 52 to record the board history and the like in the frequency conversion board 53. EEPROM is used to test and write data to and read data from this EEPROM.

This feature uses the serial data format as well, which uses the IIC data format.

The data format of the IIC method uses only two signals, serial clock and serial data.The transmission method starts data transmission when the serial data signal is converted from high to low when the serial clock is high and when the serial clock is high. When the serial data signal is converted from low to high, the data transmission is stopped.

The D / A CONVERTER SET TO DESIRED VALUE TEST is used to digitally control the control voltage of the digital signal attenuator used to adjust the gain of the CDMA signal's transmit output and the received signal on the frequency converter board. It converts the data through the / analog converter and transfers the data to the monitor screen through the main jig 41 for testing.

The thermal sensor read test is a test function that reads temperature data of a temperature sensor used to check board characteristics according to temperature change in the frequency conversion board 53 and the transmission power measurement board 52. .

Similarly, this function uses the serial data format, which uses an IIC data format.

The status and test result display test (STATUS AND TEST RESULT DISPLAY TEST) indicates the presence or absence of a signal of 10 MHz which is used as a reference signal of the local signal generator in the frequency conversion board 51 and the transmission power measurement board 52. It is a test function that informs the locking status, checks the fail status of the wireless board itself and the status of the parallel bus and checks the display of the status.

The presence of a 10 MHz signal or the locking state of the local signal generator displays the data detected by each detection circuit, and the FAIL state of the wireless board itself displays the corresponding DATA on the monitor screen to determine whether the data transmission / reception port is operating normally. Check it.

The A / D & D / A converter debugging test (A / D & D / A CONVERTER DEBUG TEST) is a control voltage when the control function of the digital signal attenuator is controlled through the digital / analog converter. It is a test function that finds and corrects an error part while writing data from the lowest value to the highest value at regular intervals.

SERIAL DATA DEBUG TEST Parts such as PLL chips, EEPROMs, and temperature sensors used in local signal generators send and receive serial data and test the serial data send / receive ports for proper operation.

In this case, the serial data to be transmitted is displayed on the monitor screen to check whether the serial data transmit / receive port is working properly.

In the mobile communication system according to the present invention, the test apparatus of the base station wireless board has the following effects.

The test apparatus of the present invention implements a jig composed of a wireless board control part in an integrated manner including a processor, a ROM, a RAM, a parallel bus interface connector, a monitor port, and an extended test board. The device is versatile.

In other words, when testing different types of wireless boards, it is not only necessary to prepare an extended test board for each test purpose, but also to perform all the required tests, and to accurately and reliably test using a personal computer, thereby increasing the range of test functions. You can.

Claims (1)

Parallel bus signals are serialized when the parallel bus interface connection is connected, the back board interface connection to which the parallel bus interface or serial bus interface connector is applied, depending on whether the system bus is parallel or serial. An extended test board including a serial bus interface block adapted to a bus interface scheme; Memory block that stores and outputs data necessary for test control of wireless board, processor that reads data from memory block and stores necessary data, and is connected to personal computer using RS 232 interface cable and user communicates with main jig. Test of the base station wireless board in a mobile communication system comprising a main port including a monitor port used to connect to the expansion test board and a parallel bus interface connection connected to the extended test board for mutual transmission of parallel matching signals. Device.