Mathematical modeling for optimal deployment of in-building Distributed Antenna Systems

In-building Distributed Antenna System (IB-DAS) has been proved to be one of the most efficient methods to provide sufficient coverage and capacity for indoor users. The target of a successful IB-DAS deployment is to guarantee the coverage as well as the capacity of the in-building areas with minimum deployment cost. We consider the optimal deployment of the IB-DAS based on passive DAS in this paper. Mixed Integer Programming model has been developed for the topology design of IB-DAS through the optimal installation of power splitters in order to connect all the antennas with minimum cable cost, meanwhile, the transmit power at each antenna are kept within the satisfied level for the service guarantee. The model can deliver optimal solutions to systems with a practical size where passive DAS is commonly deployed. To improve the time efficiency, preprocessing has been done to integrate the building layout data into the modeling. Application of the model over realistic IB-DAS deployment has been conducted, which demonstrates the effectiveness of the model.