Indoor distribution system is an important component of the wireless network.According to the statistics 70% of the packet service happens indoors

but the signal propagation ability of TD-LTE is weak because of the high frequency band of TD-LTE

so that the indoor signal coverage ability of TD-LTE is poor.Therefore we must construct indoor distribution system to absorb indoor business

and to enhance the user perception.This paper gives the solution to indoor distribution system

and analyzes the interference between systems to make sure that the user peak rate is guaranteed.