In the current LTE daily optimization, the test tools used by telecommunications are mainly CDS, ATU, and Dingli. The equipment manufacturers mainly use the test tools developed by their respective companies, and the output indicators of different test tools are also different. In this case, through the three commonly used test equipments of Huawei PROBE, Telecom CDS and Telecom ATU, the difference between different softwares of the same terminal and the difference of the same software of different terminals are evaluated by means of DT and CQT; in order to establish a standardized scale for daily optimization and evaluation. And weights and measures.
2. Test principle and methodCDS software ABM sampling test: Based on the UDP service test, the download test and the upload test adopt the sampling bandwidth mode, and within every 1S, the UDP transmission is performed only within the 100 ms of the contact. If the test is stopped from the LTE network, the sampling test stops sampling and the terminal returns to the sleep state. The upload/download is tested in the unified terminal in time slots. When the dial-up connection is abnormal, the connection is re-initiated after 10S. 1) If the reason is that the dialing is interrupted, the sampling point and time before the dialing abnormal interruption are included in the statistics; 2) If there is no data transmission due to the network problem exceeding the 30S application layer during the testing process, the network connection needs to be disconnected, and the data transmission process The last 30S is not included in the LTE rate statistics;
Probe software test: Probe software uses FTP software for upload/download test. Upload/download separately for testing;
ATU software PBM test: PBM sampling test: Based on UDP service test, download test and upload test adopt sampling bandwidth mode, and within every 1S, UDP transmission is only performed within 100ms of contact. If the test is stopped from the LTE network, the sampling test stops sampling and the terminal returns to the sleep state. The upload/download is tested in the unified terminal in time slots. When the dial-up connection is abnormal, the connection is re-initiated after 15S. 1) If the reason is that the dialing is interrupted, the sampling point and time before the dialing abnormal interruption are included in the statistics; 2) If there is no data transmission due to the network problem exceeding the 30S application layer during the testing process, the network connection needs to be disconnected, and the data transmission process The last 30S is not included in the LTE rate statistics;
Test Equipment:
3.1. Analysis of test results of different test software
3.1.1. CQT test Probe and CDS differences (-X indicates the number of times)
Test method: use the same computer to test the indicators 3 times with CDS and Probe software respectively;
Test conclusion: The RSRP value parsed by CDS test software is slightly lower than that of Probe software, but the SINR and average download rate and average upload rate of CDS software are higher than Probe test index; SINR is 5.4dB difference, download difference is 13.2M, upload The difference is 5.3M;
3.1.2.DT test Probe and CDS differences (-X indicates the number of times)
Test method: Use the same computer to perform DT test 3 times on CDS and Probe software on the same road segment for comparison of indicators; test conclusion: The RSRP value analyzed by CDS test software is slightly lower than the value analyzed by Probe, but the SINR and average of CDS software analysis The download rate and the average upload rate are much higher than the Probe test indicators; the SINR differs by 3.9dB, the download difference is 3.4M, and the upload difference is 7.0M;
The test conclusion: The RSRP value of the CDS test software is slightly lower than the value analyzed by Probe, but the SINR and average download rate and average upload rate of the CDS software are much higher than the Probe test index; the SINR is 3.9dB, and the download is 3.4. M, the upload difference is 7.0M;
3.1.3. Different software projects with the same terminal comparison test summary Through different software in the same wireless environment and the same computer test indicators comparison, CDS software CQT indicators and DT indicators are better than Probe software analysis values;
3.2. The same test software different computer comparison analysis 3.2.1.CDS software different computer CQT test comparison; (-X indicates the number of times) Test method: use 2 computers in the same position to test with CDS software 3 times for index comparison; test conclusion The RSRP values ​​obtained by computer 1 and computer 2 test are not much different, but the SINR and average download rate and average upload rate of PC 2 are much higher than the computer 1 test index; the SINR is 3.1dB, the download difference is 7.1M, upload The difference is 7.3M;
3.2.2.Probe software CQT test comparison of different computers; (-X indicates the number of times) Test method: use 2 computers in the same position to test 3 times with Probe software respectively; the test conclusion: RSRP of computer 1 and computer 2 parsing The values ​​are not much different, but the SINR and average download rate and average upload rate of the computer 1 software are higher than the computer 2 test indicators; the SINR is 1.4dB, the download difference is 2.9M, and the upload difference is 1..8M;
3.2.3.CDS software different computer DT test comparison (-X indicates the number of times) Test method: use 2 computers in the same road segment to use CDS for DT test 3 times for index comparison; test conclusion: computer 2 parsed RSRP value is higher than computer 1 parsed value, and the SINR and average download rate and average upload rate of the computer 2 software analysis are higher than the computer 1 test index; the SINR is 2.4dB, the download difference is 6.4M, and the upload difference is 6.6M.
3.2.4.Probe software different computer DT test comparison (-X indicates the number of times) Test method: use two computers in the same road segment to use the Probe for DT test 3 times for index comparison; test conclusion: computer 1 and computer 2 parsed RSRP value The difference is not large, and the SINR and average download rate and average upload rate of the computer 2 software analysis are not much different from the computer 1 test indicators;
3.2.5. Same test software Different computer comparison test Use the same software to compare CQT and DT group test through different computers. During the test process, ensure the same position in the test process. The test index of test computer 2 is better than test computer 1 test index. , group test results as follows;
3.3. ATU and Probe comparison analysis 3.3.1. CQT test Probe and ATU difference (-X indicates the number of times) Test method: use one computer in the same location to use the Probe software for CQT test and use an ATU device for CQT test test 3 times to compare the indicators; test conclusion: no matter whether the good or bad ATU test software parsed the RSRP value is higher than the Probe parsing value, and the average download rate and average upload rate of the ATU software parsing are higher than the Probe test index; download the difference 9.7 M, the upload difference is 3.1M;
3.3.2. DT test Probe and ATU difference (-X indicates the number of times) Test method: use one computer on the same road segment to use the Probe software for DT test and one ATU device for DT test test 3 times for index comparison; test Conclusion: The RSRP value of the ATU test software is slightly higher than that of the Probe, and the SINR and average download rate and average upload rate of the ATU software are higher than the Probe test index; the SINR is not much different, the download difference is 4.9M, and the upload difference is 6.6M;
3.3.3. ATU and Probe test comparison Using ATU and Probe software for group test, through CQT and DT group comparison test, Probe software test index is better than ATU test index;
1. CDS and Probe software are compared with the unified test terminal. Through CQT and DT group test, the CDS test index is superior to the Probe test index.
2. The CDS software passes the CQT and DT group test through different terminals and the Probe software under the same conditions. The test indexes of Probe software under different terminals are not much different; the test results of CDS under different terminal conditions are very different. , the test terminal requirements are higher;
3. Compared with the ABE and the Probe, the ATU test index is worse than the Probe test index under the same conditions;
In summary, the advantages and disadvantages of the three test tools are summarized as follows:
CDS advantages: indicator display ability "Probe" ATU;
Disadvantages: The results of CDS test are particularly affected by computer configuration, and the fluctuation range is large;
Probe advantages: The results of testing with different computers are small and stable;
Disadvantages: device compatibility is not good, many mainstream terminals can not be adapted to it;
ATU advantages: simple and reliable equipment, easy to operate;
Disadvantages: The test results are the worst among the three;
High voltage Vacuum circuit breaker is an indoor power distribution device in the 3~10kV, 50Hz three-phase AC system, which can be used for the protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. It is especially suitable for places requiring oil-free, less maintenance and frequent operation. The circuit breaker can be configured in the central cabinet, double-layer cabinet, and fixed cabinet to control and protect high-voltage electrical equipment.
Specifications:
1.Vacuum circuit breakers can usually be divided into several voltage levels. Low-voltage type is generally used for explosion-proof electrical use. Like coal mines and so on.
2.The rated current reaches 5000A, the breaking current reaches 50kA, and the voltage has reached 35kV.
Voltage parameters
Rated voltage: kV 10, maximum voltage: 11.5
Insulation level: power frequency withstand voltage, pole to ground: 42
Between fractures: 48
Impulse withstand voltage between poles, pole to ground: 75
Between fractures: 84
Current parameter Rated current A; 1250 1250 3150
Rated short-circuit breaking kA: 20 31.5 40
Rated peak withstand current kA: 50 80 100
4S short-time withstand current kA: 20 31.5 40
Rated short-time closing current (peak) kA 50 80 100
Rated breaking current of single capacitor bank A: 630 800
Rated back-to-back capacitor bank breaking current A: 400 400
Service life Rated short-circuit breaking current times: 50 50 30
Mechanical life times: 10000
Other rated operation sequence: opening - 0.5s - closing - opening - 180s - closing - opening - 180s - closing - opening - 180s - closing - opening
Total breaking times: no more than 60
Equipped with operating mechanism CD or CT machine
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