KR100289313B1 - Call process performance tester by loopback in the mobile communication system and method thereof - Google Patents

Abstract

According to the present invention, as the control station of the mobile communication system processes a mobile call by itself without interworking with an exchange, it is possible to perform a call processing performance test by two-way communication, and loop back a specific call during normal call processing to perform a specific vocoder performance. An apparatus and method for testing call processing performance by loopback in a mobile communication system capable of performing a test, the call processing unit of a control station requesting a channel allocation from a control unit in a TSB according to a channel allocation request of a base station, Subsequently, the controller determines whether the call data according to the channel allocation request is general call data for general call processing or loopback call data for call processing performance test, and the call data is general call data for normal call processing. The vocoder encodes call data and assigns it to the corresponding channel on the E1-link. In case of performing general call processing and the call data is loopback call data for call processing performance test, or performing a loopback function for a specific call when performing general call processing, the vocoder encodes the call data to E1-link. The loopback mode is set by assigning to the corresponding channel on the loop and then looping back to the input section after decoding the vocoder, and testing the sound quality and call processing performance of the vocoder or a specific vocoder in this loopback mode. It is done.

Description

Call processing performance tester by loopback in mobile communication system and method thereof {Call process performance tester by loopback in the mobile communication system and method}

The present invention provides a mobile communication system employing a code division multiple access (CDMA) scheme such as a digital cellular system (hereinafter referred to as 'DCS') or a personal communication system (hereinafter referred to as 'PCS'). In a communication system, call processing performance by two-way communication as a control station processes a mobile to mobile call (hereinafter referred to as a "mobile call") from a mobile terminal to itself without interworking with an exchange. Apparatus and method for call processing performance testing by loopback in a mobile communication system capable of performing a test and loopbacking a specific call during normal call processing to perform a performance test of a specific vocoder It is about.

In general, a mobile communication system such as a DCS or a PCS includes a mobile terminal 1, a base station 2 that wirelessly transmits and controls data to and from the mobile terminal 1, and the base station. And a control station 3 and an exchanger 4 for transmitting and receiving data to and from the data.

In the mobile communication system having such a configuration, conventionally, call data flowing into the control station 3 via the mobile terminal 1 and the base station 2 are looped back to the mobile terminal 1, and The call processing state at the control station 3 was tested by comparing the originating data with the incoming data looped back.

That is, in the conventional loopback call processing performance test method, the call data introduced into the TSB (Transcoder Selector Bank) in the control station 3 via the base station 2 is immediately looped back without passing through the vocoder, and the mobile terminal 1 again. In this way, since the outgoing data and the incoming data of the mobile terminal 1 are the same, the user hears his or her own voice with one mobile terminal 1.

However, the conventional call processing performance test method by the loopback has the following problems.

First, since the vocoding operation of encoding and decoding by the vocoder is not performed on the call data introduced into the TSB in the control station 3, accurate sound quality and call processing performance test at the control station 3 is performed. It is difficult to expect the results, and secondly, since it is simply a loopback that speaks and listens to voice data with one mobile terminal 1, sound quality and call processing tests by two-way communication with other mobile terminals cannot be accurately performed.

Finally, the loopback set up for call processing performance is set to normal mode because all calls are operated and maintained at the control station already set up once, allowing only one independent test at a time. During normal normal call processing, no test can be performed on sound quality and call processing performance on a particular vocoder, ie a particular channel.

In other words, in order to loop back and test the call, the call processing unit in the control station must be set to the loopback mode state.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is that an application software for controlling an E1-link in a control station of a mobile communication system plays a role similar to some functions of an exchange so that a call is established on the same link. Call handling performance tests by two-way communication can be performed as the operator handles a mobile call by connecting each call to a desired one, and during the normal general call processing, loopbacks a specific call to perform a call processing performance test of a specific vocoder. An apparatus and method for testing call processing performance by loopback in a mobile communication system are provided.

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

2 is a block diagram of an apparatus for testing call processing performance by loopback in a mobile communication system according to the present invention;

3 is a flowchart illustrating a method for testing call processing performance by loopback in a mobile communication system according to the present invention;

<Explanation of symbols for main parts of the drawings>

10: call processing unit 20: TSB

21: input unit 22: output unit

23: input / output buffer 24: detector

25 control unit 26 switching unit

30: Vocoder

In the mobile communication system of the present invention for achieving the above object, a loopback call processing performance testing apparatus and method thereof include a call processing unit of a control station requesting a channel allocation from a control unit in a TSB according to a channel allocation request of a base station. Subsequently, the controller determines whether the call data according to the channel allocation request is general call data for general call processing or loopback call data for call processing performance test, and the call data is general call data for normal call processing. In the vocoder, call data is encoded and allocated to the corresponding channel on the E1-link to perform general call processing, and when the call data is loopback call data for call processing performance test or when performing general call processing, When performing the loopback function, the vocoder encodes the call data. The loopback mode is set by assigning to the corresponding channel on the E1-link, looping back, decoding the vocoder and re-input to the input unit, and testing the sound quality and call processing performance of the vocoder or a specific vocoder in this loopback mode. It is characterized by.

In addition, by looping back the call data of one channel according to the operator's command through the debugging monitor of TSB, and looping back the call data of the other channel where the call is set up again, the two call paths are cross-switched to allocate mutual channel. It is characterized by testing the call processing performance by communication.

Hereinafter, an apparatus and method for testing call processing performance by loopback in a mobile communication system according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a block diagram of a block diagram of an apparatus for testing call processing performance by loopback in a mobile communication system according to the present invention, and includes a call for controlling the overall call processing operation at the control station 3. A TSB 20 for controlling and managing a call and control data input through the call processing unit 10, a loopback function for a mobile call or a specific call, and the TSB 20. The TSB 20 encodes the call data inputted through the channel and outputs the same to the corresponding channel on the E1-link and outputs to the switch 4 or decodes the call data allocated to the corresponding channel on the E1-link input from the switch 4 to the TSB 20. It consists of a vocoder 30 to output.

The TSB 20 exchanges an input unit 21 for inputting call and control data input through the call processing unit 10 and call data encoded by the vocoder 30 through a corresponding channel on an E1-link. 4) an output unit 22 for outputting the call data decoded by the vocoder 30 to the input unit 21 in case of loopback control, and a call and control data input through the input unit 21 temporarily. An input / output buffer 23 for temporarily storing call and control data to be stored or output through the output unit 22, and a detection for detecting and analyzing call and control data stored in the input / output buffer 23 The control unit 25 outputs a switching control signal by determining whether the call data analyzed by the detecting unit 24 is general call data for general call processing or loopback call data for call processing performance test. ) And the control unit 25 It consists of a switching unit 26 for switching operation according to the switching control signal output.

The operation of the call processing performance test apparatus by loopback in the mobile communication system of the present invention configured as described above will be described with reference to the flowchart of FIG. 3.

With the call processing procedure between the mobile terminal 1 and the base station 2 being made, a channel allocation request corresponding to the channel of the base station 2 itself is transmitted from the base station 2 to the call processing unit 10 in the control station 3. Upon entering (S1), the call processing unit 10 of the control station 3 artificially requests channel allocation again from the control unit 25 in the TSB 20 through the input unit 21 in the TSB 20 (S2). .

At this time, in step S2, the input unit 21 in the TSB 20 stores the call and control data according to the channel allocation request of the call processing unit 10 in the input / output buffer 23, and the sensing unit 24. By analyzing the call and control data stored in the input / output buffer 23 through (S3) it is confirmed that the call and control data according to the channel allocation request.

Accordingly, the controller 25 recognizes that the call and control data stored in the input / output buffer 23 are call and control data according to a channel allocation request through the analysis result of the sensing unit 24 (S2). You will receive a channel allocation request for.

Here, the steps (S1, S2), actually, when the exchange 4 is interlocked with the switch 4, the switch 4 determines the vocoder resources of the control station 3 to request the channel processing unit 10 of the control station (3) Then, the flow is made to the flow required by the TSB 20 in the control station 3.

However, in the present invention, the call processing unit 10 of the control station 3 determines the vocoder resource to the TSB 20 to artificially create the same flow as required by the exchange 4 without interworking with the exchange 4. This is done with a flow that requires channel allocation.

As described above, the channel allocation request transmitted to the TSB 20 means that the vocoder 30 encodes the call data and allocates it to a specific channel on the E1-link.

Subsequently, the controller 25 determines whether the call data according to the channel allocation request is general call data for general call processing or loopback call data for call processing performance test of the base station 2 and the control station 3 alone. The operation of the switching unit 26 is controlled (S4).

If the call data according to the channel allocation request in step S4 is general call data for normal call processing, the vocoder 30 encodes the call data stored in the input / output buffer 23 to correspond to the corresponding data on the E1-link. After assigning to the channel (S5), the general call processing is performed by outputting to the switch 4 through the output unit 22 (S6).

If the call data according to the channel allocation request in the step S4 is loopback call data for call processing performance test, the vocoder 30 in the input / output buffer 23 is the same as in the step S5. The stored call data is encoded and allocated to the corresponding channel on the E1-link (S7).

Thereafter, the call data encoded by the vocoder 30 is looped back without being output to the switch 4 through the output unit 22, decoded by the vocoder 30, and then inputted again into the input unit 21 to perform the loopback mode. To set (S8).

That is, the loopback call data input to the input unit 21 is looped back after the encoding process of the vocoder 30 and is transmitted to the control station 3 again through the decoding process of the vocoder 30 so that it is 1: 1 with the base station channel. Communication is made, and thus, the mobile terminal 1 enters the loopback mode in which the mobile terminal 1 listens to its own voice after the vocoding process of the vocoder 30.

In the loopback mode as described above, it is possible to perform a test regarding the sound quality and the call processing performance of the vocoder 30 (S9).

On the other hand, when performing a general call processing in the normal mode as in step S6, when performing a loopback function for a specific call, that is, a specific channel for the test of a specific vocoder (S10), the operator monitors the debugging of the TSB (Debugging Monitor) (not shown) instructs the control unit 25 to loop back only the corresponding call data of the specific channel to which the specific call is assigned to vocoder the call data of the specific channel encoded as in step S8. Loop back to 30 to decode and re-enter the input unit 21.

Then, it is possible to perform a test on the sound quality and call processing performance of the specific vocoder 30 in the loopback mode.

On the other hand, in order to perform the call processing performance test by the two-way communication, the mobile call processing is performed. First, the call data of one channel is looped back according to the operator's command through the debugging monitor of the TSB, and the call of the other channel is set again. By looping back the data in the same way, each of the two mobile terminals hears its own voice.

In this state, the control unit 25 instructs cross switching of the call paths of the mobile terminals through the debugging monitor of the TSB so that the mutual call paths can be directly allocated to the loopback function for the two calls.

That is, the transmitting side Tx of the first mobile terminal becomes the receiving side Rx of the second mobile terminal, and the receiving side Rx of the first mobile terminal becomes the transmitting side Tx of the second mobile terminal. The two-way communication path is established.

As described above, in the present invention, a general call for general call processing and a loopback call for call processing performance test may coexist, thus loopbacking only corresponding call data for a few vocoders determined to have problems during general call processing. This allows performance tests on vocoder to be performed.

Through the debugging monitor of the TSB, the operator adjusts the switching directly, loops back the call data allocated to an arbitrary channel, loads it in the data memory inside the TSB, and switches the loaded call data to the desired vocoder to connect with the vocoder connected. Intercommunication can be performed.

As described above, the present invention can perform the sound call and performance test for a specific vocoder by performing the mobile call processing by the control station alone, and performing the call processing performance test for the specific call during the general call processing. It works.

In addition, it is possible to perform interworking test with the exchange after performing the call processing performance test that could be performed only when interworking with the exchanger and the call processing performance test for a specific call during general call processing alone. There is an effect that can significantly reduce the time and cost accordingly.

Claims (2)

In the test apparatus for the call processing performance test at the control station (3) of the mobile communication system, A call processing unit 10 for controlling the overall call processing operation at the control station 3, An input unit 21 for inputting call and control data input through the call processing unit 10 and outputting call data encoded by the vocoder 30 to the switch 4 through a corresponding channel on the E1-link or looping back. In the case of control, the output unit 22 outputs the call data decoded by the vocoder 30 to the input unit 21, and temporarily stores the call and control data input through the input unit 21 or the output unit ( An input / output buffer 23 for temporarily storing call and control data to be output through 22), a detector 24 for detecting and analyzing call and control data stored in the input / output buffer 23; A controller 25 for determining whether the call data analyzed by the detector 24 is general call data for general call processing or loopback call data for call processing performance test, and outputting a switching control signal; Output from 25) TSB for controlling and managing the call and control data input through the call processing unit 10, and processing the loopback function for a mobile call or a specific call. 20, The call data input through the TSB 20 is encoded and assigned to the corresponding channel on the E1-link to output to the switch 4 or to decode the call data allocated to the corresponding channel on the E1-link input from the switch 4. And a vocoder (30) for outputting to the TSB (20). In the test method for the call processing performance test at the control station of the mobile communication system, In a state in which a call processing procedure is performed between the mobile terminal 1 and the base station 2, when the channel allocation request is received from the base station 2, the call processing unit 10 of the control station 3 enters the input unit 21 of the TSB 20. The first step of requesting the channel assignment to the control unit 25 in the TSB 20 and the call data input through the input unit 21 according to the channel assignment request in the first step is used for general call processing. A second step of determining whether it is general call data or loopback call data for call processing performance test; and if the call data according to the channel allocation request in the second step is general call data for normal call processing, the vocoder 30 ) Encodes the call data stored in the input / output buffer 23 and assigns it to the corresponding channel on the E1-link, and then outputs to the switch 4 through the output unit 22 to perform general call processing. Step, and the second step If the call data according to the channel allocation request is loopback call data for call processing performance test, the vocoder 30 encodes the call data stored in the input / output buffer 23 and assigns the corresponding call data to the corresponding channel on the E1-link. After that, the loopback mode state is set by loopbacking the call data encoded by the vocoder 30 without outputting to the switch 4 through the output unit 22, decoding the vocoder 30, and then re-input to the input unit 21. A fourth step of performing a test on sound quality and call processing performance of the vocoder 30 in the loopback mode of the fourth step, and a specific call during the general call processing in the third step. When performing the loopback function, the operator instructs the control unit 25 to loop back only the corresponding call data of the specific channel to which the specific call is assigned through the debugging monitor of the TSB. A fifth step of setting the loopback mode state by looping back and decoding the call data to the vocoder 30 and then re-input to the input unit 21, and the sound quality of the specific vocoder 30 in the loopback mode state of the fifth step. In the sixth step of performing the test on the call processing performance, and the mobile call processing in the normal mode state of the third stage or the loopback mode of the fourth and fifth stages, the operator's command is performed through the debugging monitor of the TSB. According to the seventh step of looping back the call data of one channel, looping back the call data of the other channel to which the call is set up, and cross-switching the paths of the two calls and allocating mutual call paths, the seventh step of testing call processing performance by bilateral communication Call processing performance test method by loopback in a mobile communication system, characterized in that further comprises.