This post refers to the issue of interference in the radio network. Please read further down to find the solution to the problem.
Problem Progress:
1. Use of the original frequency: 380-385 m, 390-395 m
2. Examples of planned usage frequency:
Interference regio: 380-390 m, 390-400 m, 400-410 m, 410-420 m
3. Impact assessment:
3.1. 1 phase ii terminal EP682 in XX only supports 380 ~ 410MHz, and does not support more than 410M;
3.2. At present, RRU of 380-400m is used in the first phase in XX. If the interference area is connected by any 10M+10M bandwidth in the range of 400-450m, the RRU and external filter need to be replaced, and the external filter needs to be customized.
Root cause:
The microwave working frequency band is 388-389MHz 398-399MHz, which causes the interference to the radio network.
Solution Description:
1. The 400-410 frequency band has no system interference.
2. Microwave working frequency band: 388-389MHz 398-399MHz. It is recommended that the working bandwidth (400-405MHz) in the interference area of the eLTE network be 1MHz, which requires frequency scanning at the site. If there is no interference, this solution can be used.
3. The RRU and external filter need to be replaced. The external filter needs to be customized.
