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5G NR field test application scheme

The 5G NR monitoring analyzer mainly deals with the complete test cases provided by the latest 5G NR communication system. It provides efficient test methods and means for spectrum analysis, interference investigation, base station test, road coverage and other test requirements. It is an essential tool for projects such as base station opening verification and network quality improvement projects.

"Multiple uses for one table" 

———-Assist wireless engineers to better optimize wireless network 

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TDD interference troubleshooting tool - "Gating Technology" 

Gating technology can separate the time domain and frequency domain. It is mainly used in the interference investigation of TDD-5G, TDD-LTE, DMR and other standards. Through the gating technology, the time unit can be freely set, such as: GPS delay, start Time slot, start symbol and other 4G and 5G time units, and the set time length can be quickly converted into frequency domain waveform through FFT Fourier, and the minimum 100MHz frequency domain waveform corresponding to any 5G symbol can be displayed, and then By locking the GP symbol (Note: GP is the guard interval, as the transition band from the downlink signal to the uplink signal, this time is a silent period, no data is sent) to filter out the downlink signal of the base station and the uplink signal of the user, and perform interference investigation.  

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TDD waveform under normal spectrum scan


After the gating technology is adopted, three kinds of signals under a TDD system will be stripped, namely: the downlink signal of the base station, the GP signal and the uplink signal of the UE.

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Industry's first gating technology with "only 1" symbol level

The following figure uses the gating technology to synchronize the time domain waveform of the 5G signal in the mobile 2.6G band, and can display the 5G subframe ratio of 8:2, the period of 5ms, and the number of time slots S on the waveform. = period * 2u, so when the subcarrier interval is 30KHz, there are 10 time slots in total, and two periods are used cyclically.

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It is backward compatible with TDD-LTE system interference check with a maximum bandwidth of 20MHz and other network interference check work using TDMA technology

It can also support the whole network 2-3-4-5G full-scale interference investigation, ensure the high cost performance of the user's instrument, and completely realize the "multi-purpose of one meter"

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Signal coverage test

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Key Specifications

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More 5G test cases are as follows. If you need to know about relevant cases, please contact our sales, thank you.

Other Cases

An operator in the vicinity of three base stations in the Division Court district there is round-the-clock interference, resulting in complaints from neighboring 5G users perception problems, through the background network management to detect PRB noise value, found 2515-2535MHz lift, due to the three base stations are the strongest interference in the sector of the cell, the preliminary analysis for the existence of interference equipment in the small area.

Wireless WIFI signal class interference 5G network - Zhengzhou wireless network bridge interference 5G network

Detail

The south sector of a 5G base station of an operator in Xuchang is subject to long-term interference, leading to a great impact on cell access, switching and other indicators, which seriously affects the perception of 5G user access, with interference levels around -103dBm.

Jammer interferes with 5G network-Xuchang jammer interferes with 5G network

Detail

According to the feedback of a carrier's network optimization department staff, a number of 5G base stations in the Jinan area of a city have been interfered by unknown interference sources since the opening of the station, the background extraction of interference information as shown below, different base station statistics interference signal bandwidth occupies about 20 RB, interference band consistent, can be presumed to be the same source of interference.

Emulation base station jamming 5G network - Tianjin emulation base station jamming 5G network

Detail