KR20010091090A - Traffic route test method between base station controller and exchanger of mobile communication system - Google Patents

Abstract

PURPOSE: A method for testing a traffic path between an MSC(Mobile Switching Center) and a BSC(Base Transceiver Subsystem) of a mobile communication system is provided to save a maintenance time and cost by comparing a test sound transmitted to the BSC with a test sound received from the BSC, testing the traffic path between the MSC and the BSC, and testing each hardware device in a vocoder and the BSC. CONSTITUTION: If a test is not operated in a CCP(Call Control Processor) of a BSC(S4), an operator inputs test instructions for testing a traffic path between an MSC and the BSC and each hardware device in a vocoder and the BSC to the CCP through a BSM(Base Station Manager)(S5). The CCP groups transmitting and receiving paths of each hardware device according to 4 test modes to perform a loop-back(S6) and transmits the test instructions to the MSC(S7). The MSC receives the test instructions and transmits a test sound having a level and frequency requested by the operator through a test equipment to the BSC(S8). The test equipment measures the level and frequency of a received test sound when the transmitted test sound is received according to the 4 test modes and transmits the measured level of frequency together with the level and frequency of the test sound transmitted to the BSC to the CCP(S9). The CCP judges whether the number of test requested by the operator is performed(S10). If the number of test requested by the operator is performed, the CCP compares the level and frequency of the transmitted test sound with the level and frequency of the received test sound using a level threshold value and frequency threshold value requested by the operator and passes a good/bad judgement to the hardware device corresponding to each test mode(S11). The CCP transmits the judgement result to the BSM and outputs the judgement result to the operator(S12).

Description

Traffic route test method between exchange and control station in mobile communication system {TRAFFIC ROUTE TEST METHOD BETWEEN BASE STATION CONTROLLER AND EXCHANGER OF MOBILE COMMUNICATION SYSTEM}

The present invention includes test equipment for transmitting a test tone to a control station at a switch in a mobile communication system, and a test tone transmitted from a control control station (CCP) to a control station and a test received from the control station. The present invention relates to a method for testing traffic paths between exchanges and control stations of a mobile communication system, which can test traffic paths between exchanges and control stations as well as test the quality of each hardware device in the control station by comparing the sound.

In general, as shown in FIG. 1, a mobile communication system includes a mobile switching center (MSC) 10 that is in charge of switching between subscriber management and a control station, and a base station controller (BSC) that manages a base station. 20, a base station transceiver subsystem (BTS) 30 in charge of wireless connection with the mobile station, and a mobile station (MS) 40 moving in wireless connection with the base station 30; And a base station manager (BSM) 50 that manages and maintains the control station 20 and the base station 30.

The control station 20 is the CCP 21 performing all control functions related to the call processing of the control station 20, the call connection control and radio link control function and the 64 Kbps PCM (Pulse Code) received from the switch 10. A vocoder 22 which converts a modulation signal into packet data and transmits it to the base station 30, converts packet data of the base station 30 into a PCM signal, and transmits the packet data to the switch 10; It consists of a Local CDMA Interconnection Network (LCIN) 23 that routes information between the CCP 21 and the vocoder 22, the base station 30, and the base station manager 50.

The base station 30 demodulates a signal received from the BCP (BTS Control Processor) 31, which controls the overall functions of the base station 30, and the signal received from the mobile station 40, and transmits the demodulated signal to the control station 20. A CE (Channel Element) 32 performing a function of modulating the packet data received from the 20 to the mobile station 40, and information between the control station 20, the BCP 31 and the CE 32. It consists of a BTS (BTS Interconnection Network) 33 for routing.

In the mobile communication system configured as described above, when the test packet is made and transmitted from the CCP 21 of the control station 20 to the switch 10, the control station 20 returns the test packet received by the switch 10 again. The traffic path between the switch 10 and the control station 20 was tested by transmitting to the CCP 21 of the control.

However, the conventional traffic path test method between the switch 10 and the control station 20 can only know the state of the traffic path between the switch 10 and the control station 20, and accurately the control station 20 I couldn't figure out what was wrong with me.

In the case of a test on the quality of the vocoder 22 in the conventional control station 20, when the test packet is generated from the CCP 21 of the control station 20 to the vocoder 22 and transmitted, the vocoder 22 receives the test packet. A test on the quality of the vocoder 22 was performed through a polling test in which a test packet was sent back to the CCP 21 of the control station 20.

However, there has been a problem that the test method for the quality of the conventional vocoder 22 as described above also knows only the state of the vocoder 22.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a test equipment for transmitting a test sound to a control station at an exchange of a mobile communication system, and to provide a test sound transmitted from the control station to the control station. By comparing the level and frequency of the test sound received from the control station with the level and frequency, the traffic path between the exchange and the control station is tested as well as the quality of each hardware device in the control station, including the quality of the vocoder. In addition, the test results provide a method of testing the traffic path between the exchange and the control station of the mobile communication system to accurately and easily find out and maintain any part of the control station.

1 is a block diagram of a general mobile communication system;

2 is a view showing a test path when performing a traffic path test method between an exchange and a control station of a mobile communication system according to the present invention;

3 is a flowchart illustrating a method for testing a traffic path between an exchange and a control station of a mobile communication system according to the present invention;

<Description of the symbols for the main parts of the drawings>

10: exchanger 11: test equipment

12: time switch 20: control station

21: CCP 21 ': SIP

22: Vocoder 22 ': Selector

23: LCIN 30: base station

31: BCP 32: CE

33: BIN 40: Mobile station

50: base station manager

In order to achieve the above object, a traffic path test method between an exchange and a control station of a mobile communication system of the present invention includes a test command for an operator to test each hardware device in the control station including a traffic path and a vocoder between the exchange and the control station through a base station manager. Is input to CCP in the control station, CCP binds the transmit and receive paths of each hardware device according to the test mode, loops back, transmits the test command to the exchange, and controls the test sound through the test equipment at the exchange according to the test command. After transmitting to the station, it loops back and measures the level and frequency of the test sound received by the test equipment and transmits it to the CCP.Then, the level and frequency of the test sound transmitted with the level threshold and frequency threshold requested by the operator in the CCP. Compare the level and frequency of the received test sound with the hardware corresponding to each test mode. After making a good / unfavorable decision for the device, and outputs the result of the determination to the operator through the base station manager.

Hereinafter, a traffic path test method between a switch and a control station of a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a diagram illustrating a test path when a traffic path test method between an exchange and a control station of the mobile communication system according to the present invention is performed. In the present invention, a test sound is transmitted to the switch station 10 to the control station 20. FIG. Test equipment 11 called VQTU (Vocoder Quality Test Unit) for each hardware device in the control station 20, including the traffic path between the switch 10 and the control station 20 and the quality of the vocoder 22 Test the quality

One test equipment 11 is provided in the exchanger 10 so that one test apparatus 11 is provided for the control station 20. The test equipment 11 includes up to 1920 vocoders mounted on the control station 20. You will be in charge of the test.

The test equipment 11 in the exchanger 10 transmits the PCMized test sound to the control station 20 so that the test sound is returned when the test sound is looped back from each hardware device of the control station 20. By measuring the level and frequency of the control station 20 and transmitting it to the CCP 21 of the control station 20 by comparing the level and frequency of the test sound transmitted from the CCP 21 with the level and frequency of the received test sound, Check the quality.

As shown in FIG. 2, the test equipment 11 in the exchanger 10 transmits the test sounds to the control station 20 via a time switch 12 according to four test modes. , ① denotes the test equipment 11 at the SIP (just before exiting the traffic path between the switch and the control station) 21 'in the control station 20 to test the traffic path between the switch 10 and the control station 20. In the first test mode in which the test sound is looped back, ② denotes a test sound of the test equipment 11 at the vocoder 22 in the control station 20 to test the quality of the vocoder 22 in the control station 20. Indicates a second test mode that is looped back, and ③ denotes a test sound of the test equipment 11 at the selector 22 'in the control station 20 to test the selector 22' in the control station 20. Indicates a third test mode that is looped back, and? Indicates a test site at the LCIN 23 in the control station 20 to test the traffic path to the LCIN 23 in the control station 20. A test tone of ratio 11 represents the fourth test mode in which the loopback is performed.

A traffic path test method between a switch and a control station of a mobile communication system according to the present invention will be described.

The test equipment 11 in the exchanger 10 controls the level and frequency of the test sound received from the control station 20 and the level and frequency of the test sound received from the control station 20. 21) the traffic path and hardware device corresponding to each test mode by comparing the level and frequency of the test sound and the level and frequency of the received test sound with the tolerance input by the operator in the CCP 21. An OK / NOK determination is made for.

At this time, only when the comparison result with respect to the level and frequency of the test sound is good, the final decision is made on the traffic path and the hardware device.

In addition, the test is performed as many times as required by the operator, and if the unfavorable number is greater than or equal to the block count input by the operator, the corresponding hardware device is blocked and excluded from the call service.

The value used to make a good / unfavorable decision on the test sound output at the level and frequency from the CCP 21 in the control station 20 means an error tolerance of the level threshold (Threshold_dB) and the frequency distortion. It is the frequency threshold value (Threshold_Hz) to be input by the operator.

The test sound level transmitted from the test equipment 11 in the switch 10 to the control station 20 is 0dB, -5dB, -10dB, and the frequency of the test sound is 404Hz, 1004Hz, 2804Hz, and the CCP At 21, if the level of the test sound received from the control station 20 is within the ± level threshold using the level threshold, a good decision is made, and the test received from the control station 20 using the frequency threshold. If the negative frequency is within the ± frequency threshold, a good decision is made.

The traffic path test method between the exchange and the control station of the mobile communication system according to the present invention as described above will be described in more detail with reference to the operation flowchart of FIG. 3.

The operator inputs a parameter through the base station manager 50 to test each hardware device in the control station 20 including the traffic path and the vocoder 22 between the switch 10 and the control station 20. When the command is input (S1), the base station manager 50 first checks whether the input parameter is correct to check whether the test command is correctly input (S2).

If the test command is properly input in the step (S2), the base station manager 50 next checks the flag (flag) to determine whether the test is allowed (S3), and if the test is allowed, then the CCP of the control station 20 Check (21) whether the test is being performed (S4).

If the test is not being performed in the CCP 21 of the control station 20 in step S4, the operator passes the traffic path between the switch 10 and the control station 20 to the CCP 21 through the base station manager 50. And a test command for testing each hardware device in the control station 20 including the vocoder 22 (S5).

Subsequently, the CCP 21 inputting the test command loops back and forth the transmission / reception paths of each hardware device according to four test modes (S6), and then transmits the test command to the switch 10 (S7).

The exchanger 10 inputting the test command transmits a test sound having the level and frequency requested by the operator to the control station 20 through the test equipment 11 (S8), and the transmitted test sound is four When the loopback according to the test mode is received and received by the test equipment 11, the level and frequency of the test sound received by the test equipment 11 are measured and the level of the test sound transmitted to the control station 20 in step S8 and Along with the frequency is transmitted to the CCP 21 (S9).

Subsequently, the CCP 21 determines whether the test has been performed as many times as required by the operator (S10). If the test is performed, the CCP 21 has the level threshold and the frequency threshold requested by the operator and are transmitted in step S9. After comparing the level and frequency of one test sound with the level and frequency of the received test sound and making a good / unfavorable decision on a hardware device corresponding to each test mode (S11), the base station manager 50 determines the determination result. To transmit to the operator to output (S12).

If the test is not performed as many times as required by the operator in step S10, the process proceeds to step S6 to repeat the following steps.

At this time, when the determination result of the CCP 21 in the step (S11), if the level and frequency of the test sound received from the control station 20 is more than the level threshold and the frequency threshold, the corresponding hardware device is blocked to call service. Exclude from.

On the other hand, the test method according to the present invention is not limited to the request made by the operator, and can be periodically tested by setting a predetermined time or automatically tested once at a desired date and time, and until the operator ends the test. Tests may be performed.

As described above, the present invention is to test the traffic path between the exchange and the control station by comparing the test sound received from the control station and the test sound transmitted from the control station to the control station through the test equipment of the exchange in the CCP of the control station. Of course, it is possible to test the quality of each hardware device in the control station, including the vocoder, and through these test results, it is possible to accurately and easily find out which part of the control station has an error in the event of an error, thereby reducing maintenance time and cost There is an effect that can be done.

Claims (4)

A first step in which the operator inputs, through the base station manager, the traffic path between the switch and the control station and a test command for testing each hardware device in the control station to the CCP in the control station; A second step of binding and looping a transmission / reception path of each hardware device according to a test mode in the CCP inputting the test command of the first step, and transmitting the test command to an exchange; The switch inputting the test command of the second step transmits the test sound to the control station through the test equipment, loops back according to the test mode, measures the level and frequency of the test sound received by the test equipment, and sends the test sound to the control station. A third step of transmitting to the CCP together with the level and frequency of the test sound; With the level threshold and the frequency threshold in the CCP, the level and frequency of the transmitted test tones and the level and frequency of the received test tones transmitted in the third step are compared to be good / hard for a hardware device corresponding to each test mode. The fourth step of making an unfavorable decision; And a fifth step of outputting the determination result of the fourth step to the operator through the base station manager in the CCP. 2. The method of claim 1, wherein the first step comprises the steps of an operator inputting a parameter through a base station manager to input a traffic path between the exchange and the control station and a test command for testing each hardware device in the control station. A step of confirming whether the test command in the step is correctly input; and, if the test command is properly input as a result of the checking of the step, the base station manager determines whether the test is permitted, and if the test is permitted, the base station The manager checks whether the test is being performed in the CCP, and if the test is not being performed in the CCP, the operator inputs the test command to the CCP through the base station manager. Method of testing traffic path between exchange and control station in communication system. 2. The test mode of claim 1, wherein the test mode of the second step comprises: a first test mode in which the test sound of the test equipment is looped back in the control station SIP, and a second test mode in which the test sound of the test equipment is looped back in the control station vocoder; And a third test mode in which the test sound of the test equipment is looped back at the selector in the control station, and a fourth test mode in which the test sound of the test equipment is looped back at the LCIN in the control station. Route test method. The method of claim 1, wherein the fourth step comprises: determining whether the test has been performed as many times as required by the operator in the CCP; and when the determination result test of the step is performed, the fourth step has a level threshold value and a frequency threshold value in the CCP. Comparing the level and frequency of the transmitted test sound with the level and frequency of the received test sound; and if the test of the determination result of the step has not been performed, proceed to the third step and proceed as follows. Performing, and if the level and frequency of the test sound received as a result of the comparison of the steps are within the level threshold and the frequency threshold, the CCP makes a good decision for the hardware device corresponding to each test mode; If the level and frequency of the test tone received as a result of the comparison of the steps is greater than the level threshold and the frequency threshold, the CCP is the hardware corresponding to each test mode. Exchange and path test method for controlling traffic between stations in the mobile communication system characterized by comprising the step of block hardware device corresponding to lower the ratio for a good determination device.