This paper mainly analyzes the development trend of interior network co-construction and sharing

introduces the indoor distribution system and the present situation

studies the POI passive chamber subsystem based on the large indoor environments and the BBU + pRRU chamber subsystem based on small indoor environments

and summarizes the difficulties of design

puts forward the improvement measures

at last shows the case of BBU + pRRU chamber subsystem and gives the design suggestions

provides an important reference for the co-construction and sharing of the chamber subsystem.