Test Background 

An operator has 24-hour interference in three base stations near Shiyuan Community, which causes surrounding 5G users to complain about perception problems. The PRB noise value is detected through the background network management, and it is found that the 2515-2535MHz rises. Because the three base stations are facing the sector of the cell The interference is the strongest, and the preliminary analysis is that there is an interfering device in the cell.  

Test process one: 

By using the 5G-TDD gating instrument to successfully find the interference source at the gate of the cell, when the directional antenna is used to point to the monitoring backhaul device on the gate of the cell, the interference signal is the strongest.  

Test process two: 

Through the on-site notification of the property personnel to turn off the equipment and the shutdown verification, there is no interference signal on the on-site spectrum and the PRB noise interference is detected through the HW network management. The base station interference disappears, and the cell performance indicators return to normal.

Summary: 

What is a wireless bridge? It uses wireless transmission to build a bridge of communication between two or more networks; wireless bridges are divided into circuit bridges and data bridges from the communication mechanism, and wireless bridges normally use 2.4G , 5.8G frequency band is used as the backhaul frequency band, but considering that 2.4G and 5.8G are public WIFI frequency bands, there will be many APs, many users, and high utilization rate, resulting in network congestion and other phenomena during busy hours.  

Some manufacturers' wireless bridges can implement spread spectrum technology, and spread spectrum to 2.5G causes mobile 5G interference, which is mainly concentrated on the 25152575MHz segment. Because this frequency band previously corresponds to mobile LTE frequencies D4, D5 and D6, and these three Frequency point movement will only open these three frequency points for user offloading when there is a large-scale security task. Normally, it will not be opened, so some wireless bridges use the frequency band of 2515-2575MHz as data backhaul, but currently mobile 5G The frequency band is 2515MHz-2615MHz, which produces frequency overlap and causes mobile 5G interference.  

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

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