KR20020012048A - Apparatus for function testing of vocoder in high speed data mobile communication system - Google Patents

Abstract

PURPOSE: A VQTU(Vocoder Quality Test Unit) for an IMT(International Mobile Telecommunication)-2000 system and a method therefor are provided to test the quality of a vocoder through an MTH(Main Test Handling) in a test Q and M(Operation and Management) BSC(Base Station Controller. CONSTITUTION: A TSM(Test Manger)(222) transmits a command message to a vocoder to an MTH(234) and receives a tested result from the MTH(234). The MTH(234) receives the command message to access PLD(Program Load Data), transmits a message to an MSH(232) in the case of obtaining equip information, receives a message from the MSH(232), and transmits the message to a TCC(TCB Call Control)(242) in case that a processor approves the message. The MSH(232) accesses the PLD and transmits a state of the processor to the MTH(234). The TCC(242) receives the message from the MTH(234) to transmit the message to a TVH(TCB Vocoder Handling)(244), and responds to the MTH(234) in the case of receiving a tested result from the TVH(244). The TVH(244) perform a test by the message transmitted from the TCC(242) and transmits the tested result to the TCC(242).

Description

Vocoder performance test apparatus and method for next generation high-speed data mobile communication system

The present invention relates to an apparatus for testing the performance of an IMT-2000 system and a method thereof, and more particularly, to a main test handling (MTH) used as a diagnostic block in an operation & management (O & M) base station controller (BSC) of an IMT2000 system. The present invention relates to an apparatus and a method for testing the performance of a vocoder.

In the conventional IMT2000 system and corresponding mobile communication system, it is necessary to measure the quality of a vocoder, which is composed of an encoder 114 and a decoder 116 as shown in FIG. If present, a separate VQT unit (VQTU) 122 is installed as a Mobile Switching Center (MSC) 120 for the Vocoder Quality Test (VQT). The VQTUs 122 are typically installed one for each MSC. The system in which the VQTU 122 is installed has a configuration as shown in FIG. 1.

Referring to this, the VQTU 122 installed in each MSC 120 is to measure the generation of the signal used in the performance test of the vocoder and the result thereof, and measured in the VQTU 122 The data is compared with a threshold value set in the MSC 120, and the comparison result is notified to the MSC 120. As a result, the testing of the VQT is conventionally performed. On the other hand, the signal used in the VQT is selected from three frequencies 404 Hz, 1004 Hz, and 2008 Hz that are normally present in the voice band. The BTS 100 controls the formation of a channel through the air with the actual mobile communication terminal.

In the testing request of the VQT from the MSC 120, the test path is delivered to the BSC 110 via the A-interface, and the BSC 110 allows the designated path to be established through the forwarded request. When the testing is completed, the MSC 120 sends a test termination command to the BSC 110 again, and the BSC 110 releases the set path by the sent command. On the other hand, the set path typically has four lookback points as follows.

First, there is a path from which the signal sent from the VQTU is encoded at encoder 114, decoded at decoder 116 and returned to the MSC;

Secondly, a path from which the signal sent from the VQTU 122 looks back at the time switch 118 to return to the MSC 122;

And third, a path from which the signal transmitted from the VQTU 122 is returned to the CDSP (Control DSP) 112 via the encoder 114 and returned to the MSC 120 through the decoder 116;

Finally, the signal transmitted from the VQTU 122 is looped inside the MSC 120 without returning to the BSC 110 and has a path back to the VQTU 122.

In the above-mentioned four paths, the vocoder 114, 116 is not included in the intermediate path in the third path and the fourth path, that is, the quality of the vocoder as the third path and the fourth path. Says it can't be tested. Rather, the path merely measures the degree of abnormality of the path.

In addition, according to the related art, the BSC 110 is capable of performing performance testing in the case of interworking with the MSC 120, even if there is no abnormality in the vocoder to be tested. In the event of a fault in the trunk, there is room for unexpected consequences. In other words, this shows that reliable testing cannot be done.

In addition, when performing the testing according to the prior art, it is brought to the operator in practical use due to the control in the exchange, and requires a separate equipment (VQTU) 122 in the room to perform the testing. It also poses a question about the reliability and accuracy of the measurement.

Therefore, in the present invention, it is possible to measure the improved performance by replacing the existing hardware diagnostic method with a software diagnostic method for measuring the vocoder performance.

In contrast, the present invention intends to adopt the following software VQT test method. In other words, TCP is responsible for the functions of the existing VQTU. In order to generate a test signal in TCP, a diagnostic device and a method for distributing a resultant signal through each section with an initial signal are provided.

On the other hand, the path considered here can be divided into two.

Firstly, the signal sent from TCP is decoded at the decoder, encoded at the encoder and flowed into TCP, and secondly, the signal sent from TCP is decoded at the decoder and encoded in the intoder through the time switch and flowed into TCP. This is the case.

In this way, there is no need to install a board for VQT diagnosis. Both paths include an encoder and a decoder in the intermediate path, so that the test can be performed in a range suitable for the test purpose.

1 is a system configuration diagram of a VQT test apparatus in the IMT2000 system according to the prior art.

2A is a system configuration diagram of a VQT test apparatus in an IMT2000 system according to a preferred embodiment of the present invention.

2B is a state configuration diagram of a VQT test apparatus and a control signal flow chart thereof in the IMT2000 system according to the preferred embodiment of the present invention.

3 is a control signal flow diagram for each block for the VQT test in the IMT2000 system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. Also, in the following description, many specific details such as components of specific circuits are shown, which are provided to help a more general understanding of the present invention, and the present invention may be practiced without these specific details. It is self-evident to those of ordinary knowledge in Esau. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2A is a system configuration diagram of a VQT test apparatus in an IMT2000 system according to a preferred embodiment of the present invention, and FIG. 2B is a state configuration diagram of the VQT test apparatus illustrated in FIG. 2A and a control signal flow diagram thereof.

Referring to this, in the case of FIG. 2A, the configuration of the test apparatus according to the related art described with reference to FIG. 1 is different as follows.

First, the test apparatus according to the present invention is provided with the TCP 212 in the BSC 210 instead of the CDSP 110.

The test apparatus according to the present invention with the TCP 212 is such that the testing is performed by the BSC 210 itself without making the testing through the MSC 122. In addition, the configuration and provision of the BTS 200, the time switch 218, the encoder 214, and the decoder 216 perform the same operations as those of the system shown in FIG.

Next, referring to FIG. 2B, a state diagram of the VQT test apparatus according to the present invention and a control signal flow thereof will be described.

The VQT related blocks are largely within the Test Manager (TSM) 222 and the BSC (Base Station Controller) 210 in the base station management (BSM) 220, in particular, the main test handling (MTH) 234 and the MSH ( 232), and a TCB Call Control (TCC) 242 and a TCB Vocoder Handling (TVH) 244 in the TCP 212.

The TCP 212 generates a packet composed of a plurality of frames, and sends the packet to the decoder 216 in the DSP. The decoder 216 converts the packet into a PCM code. The encoder 214 converts the PCM code into a packet, and the TCP 212 compares the first packet with the packet received through the encoder 214 on a frame basis. Instead of using a packet of a certain standard, a packet is randomly generated in the TVH 244 block. This packet encodes a voice signal and has a sampling frequency of 8000 hz.

The flow state of the control signal for the VQT test will be described with reference to FIGS. 2A and 2B.

First, a command message for the vocoder from the TSM 222 is sent to the MTH 234 as (a). The MTH 234 sends a message to the MSH 232 as the state (b) when the PLD accesses the PLD to obtain the information EQUIP. The MSH 232 accesses the PLD and sends the state of the processor to the MTH 234 as the state (c). The MTH 234 receives the message from the MSH 232 as (c) state and then the processor acknowledges it, and the MTH 234 sends a test message as the (d) state to the TCC 242. The MTH 234 reports a result of the processor disapproval (N_OK) to the TSM 222 as the (h) state if the processor is disapproved (N_OK) after receiving a message from the MSH 232. The TCC 242 receives the message from the MTH 234 and sends the message to the TVH 244 as (e). After performing the test, the TVH 244 sends the test result to the TCC 242 in the state (f). The TCC 242 sends a response as the (g) state to the MTH 234 upon receiving the test result from the TVH 244. MTH 234 then sends the test result to TSM 22 as (h) state.

Hereinafter, a message flow diagram of a diagnostic block according to an embodiment of the present invention will be described with reference to FIG. 3. FIG. 3 is a flowchart illustrating control signals between blocks for a VQT test in the IMT2000 system according to an exemplary embodiment of the present invention, which is a flowchart illustrating control signals between components in FIG. 2B. Therefore, the control signal flow state according to the present invention in FIG. 2B described above with reference to FIG. 3 can be clearly seen.

First, the message flow shown in FIG. 3 may be expressed as UIM-> TSM-> MTH-> MSH-> MTH-> TCC-> TVH-> TCC-> MTH-> TSM-> UIM.

When an operator issues a Man Machine Command (MMC) command in the UIM (User Interface Manager), the TSM 222 reformats a message to be sent to the MTH 234. It then sends a message to MTH 234. Then, in step 310, the MTH 234 receives the message from the TSM 222 and accesses PLD (Program Load Data) to obtain information EQUIP, N_EQUIP.

In step 312, it is determined whether the PLD has obtained EQUIP. In such a case, in step 314, a message is sent to the status block (MSH) 232 to obtain information about the status of the processor (TCP) 212. In step 314, the status block (MSH) 232 receives this message and then accesses the PLD to send the status of the processor to the MTH (234). The MTH 234 receives this message from the status block (MSH) 232 and then determines in step 318 whether the status of the processor (TCP) 212 is approved or disapproved. In the case of the approval state, a test message is sent to the test block (TCC) 242 in step 320.

However, if the state of the processor received from the state block (MSH) 232 in step 318 is NOK status, the result is sent to the TSM 222 in step 313 and the test item ends.

When the message is sent to the TCC block 242 in step 320, the MTH block 234 is used to test the first path, the second path, or both paths as a test item. Set). This is done by sending a test execution request in step 322 to the TVH 244, and the TVH 244 responding to this sends a test result request to the TCC 242 in step 324.

The TCC 242 receives the message in step 324 and then performs a test, and then sends the result to the MTH block 234 in step 326. The MTH block 234 receives this message and then sends the result to the TSM 222 in step 328.

The TSM 222 shows the received result to the operator through the UIM.

On the other hand, if the PLD is in an unauthorized state in step 312, step 313 is performed.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

Through the implementation of the present invention as described above, when testing the VQT there is an advantage that can be tested in SOFRWARE without the existing BOARD called VQTU. When testing the existing VQT, the MSC must have a dedicated board for VQT TEST, but the test can be performed without the board through the present invention, and thus, there is an advantage of saving resources. Will be.

And, since the existing path is signaled on the link between the BSC and the MSC, if the link is abnormal, there may be an unexpected result of the link even if there is no problem in the TCP itself. In the present invention, since the path is formed only within TCP, the performance of the vocoder can be measured more accurately. Conventionally, since the test can be performed by a test command issued by the MSC, only the on-demand test is possible in the diagnostic block of the BSC. However, in the present invention, the test subject is the diagnostic block of the BSC. This has the advantage that testing is possible.

Claims (8)

In the vocoder performance test apparatus of the next generation high speed data transmission mobile communication system, A decoder provided in the digital signal processor and converting the generated packet into a PCM code; An encoder for converting the converted PCM code into a packet; A packet composed of a plurality of frames is generated and transmitted to the decoder, and the TCP and the result of testing a vocoder's performance as a result of comparing the generated packet and the packet converted by the encoder with each frame. Apparatus characterized by having. The method of claim 1, wherein the generated packet, The device characterized in that it is generated in any specification by the TVH (TVH). The method of claim 2, wherein the packet, And an encoded word is generated after sampling at a predetermined frequency. In the vocoder performance test apparatus of the next generation high speed data transmission mobile communication system, A command message for a vocoder to an MTH, and a TSM for receiving a test result from the MTH; Accessing the program load data (PLD) by receiving the command message, thereby obtaining the EQUIP information to deliver the message to the MS (MSH), receives the message from the MS (MSH) and receives the processor MTH delivers the message to the TCC if approved by MSH (MSH) for accessing the program load data (PLD) to transfer the state of the processor to the MTH, After receiving the message from the MTH (MTH) delivers the message to the TV (TVH), and when receiving a test result from the TV (TCH) to transfer the response to the MTH (TCC) Wow, Device for performing a test as a mesh delivered from the TCC (TCC), and the TVH (TVH) for passing the test results to the TCC (TCC). The method of claim 4, wherein the MTH, If the processor is disapproved (N_OK) after receiving a message from the MSH (MSH) characterized in that the test is terminated after reporting the result of the processor disapproved (N_OK) to the TS (TSM). The method of claim 4, wherein the MTH, In delivering the message to the TCC, a test item for the first path or the second path and a test for both paths are set as test items, and the request for performing the test is transmitted to the TVH. Device characterized in that. In the vocoder performance test method of the next generation high speed data transmission mobile communication system, A first process of transmitting a vocoder command message to an MTH in TSM; A second process of accessing the program load data PLD from the MTH to obtain EQUIP information, and transmitting a message to the MSH; A third process of accessing the program load data PLD from the MSH and transferring a message of a state of a processor to the MTH; The MTH is a fourth process of delivering a test message to the TCC when the processor approves the delivered message; The TCC is a fifth process of delivering a message to the TVH in accordance with the message delivery; The TVH performs a test through a message transmitted, and a sixth process of delivering a test result to the TCC; The TCC is a seventh process of delivering a response to the MTH in accordance with the transfer of the test results, The MTH comprises a eighth process of delivering the test result through the transmitted response to the TSM. The method of claim 7, wherein The MTH may further include reporting a result of N_OK status of the processor to the TSM when the processor does not approve the delivered message. .