With the advent of 5 G era

people put forward higher requirements for all aspects of indoor coverage. The traditional DAS scheme does not adapt to the development trend of 5 G due to the deployment difficulties

limited capacity growth and other factors. However

the 4 G distributed base station of the current network can support 5 G NR through transformation. The project is relatively simple and can achieve 4×4 MIMO with excellent capacity performance. Therefore

the distributed base station construction scheme is suitable for many scenes covered by 5 G indoors. In this paper

the placement position of Pico RRU in distributed leather base station construction scheme is studied

and the function of automatic placement of Pico RRU in drawings is designed based on genetic algorithm

which improves the efficiency of the indoor distribution system scheme design.