Mobile base station quality appraisal

mobile base station takes wireless communication and network coverage coordination as its core principle. By optimizing radio frequency power, antenna gain and signal modulation accuracy, it achieves coordination of 5G NR, network capacity and coverage radius. It is widely used in areas such as urban dense areas, rural wide coverage, emergency communications and indoor distributed systems. In 5G network deployment, it is used for Massive MIMO beamforming; in IoT scenarios, it meets the low power consumption and wide connection requirements of NB-IoT/eMTC; in edge computing, it ensures the industrial control reliability of URLLC. Compared with traditional base stations, mobile base stations have the characteristics of flexible deployment, energy saving and high efficiency, and intelligent operation and maintenance. They are the core nodes of mobile communication networks.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide mobile base station quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for mobile base station quality appraisal.

With the large-scale construction of 5G networks, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance indicator dispute: coverage radius is not up to standard, insufficient throughput;

2, material defects: insufficient linearity of RF PA chip, antenna oscillator impedance mismatch;

3, process issues: AAU heat dissipation design defects, power module efficiency;

4, contract performance disputes: core modules (such as the number of baseband board carriers, network slicing support capabilities) are inconsistent with the technical agreement.

Mobile base station quality appraisal technical methods mainly include:

1. On-site inspection: Conduct an inspection of the base station installation site to check the appearance, infrastructure, antenna installation, etc. of the base station.

2. Performance testing: Use professional testing instruments to test the coverage capabilities, signal quality, radio frequency performance and other indicators of the base station.

3. Material analysis: Sampling and analyzing materials used in base stations, such as cables, base station machines, etc., to detect their compliance.

4. Installation inspection: Check whether the installation process of the base station complies with the specifications and whether there are problems such as cutting corners or improper installation.

An operator of the applicant signed a "5G Macro Station Procurement Contract" with an equipment vendor of the respondent, agreeing that the coverage radius should be ≥ 2km. After actual deployment, the edge rate was less than 100Mbps, and the manufacturer argued that it was due to terrain obstruction.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "mobile base station", contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis opinions:

The AAU radio frequency power of the mobile base station involved in the case is only 35W (agreement ≥ 40W), Massive The MIMO beamforming failure rate is 15%; the baseband board only supports 16 carriers (protocol 32 carriers), and the network capacity is less than 50% of the protocol value.

The appraisal conclusion concluded that hardware performance and protocol implementation defects are the main reasons for coverage failure.

The mobile base station quality appraisal report should include:

1, the purpose of the appraisal (such as network performance disputes, protocol compliance verification) and reference standards;

2, the base station model involved, software version, deployment record;

3, detection method and equipment list (such as arrow network analyzer, protocol analyzer);

4, analysis of detection data and failure correlation (such as the impact of radio frequency power on coverage radius);