Utilization of Spectrum Database for Power Control in Micro Operator Based Small Cell System by Two-Stage Stochastic Design

This paper proposes power control method in micro operator based small cell system utilizing spectrum database taking into account several scenarios which could happen in future. Here considered is situation where some of user terminals connecting to different base stations are moving, and interference management is carried out taking into account their current location and probability of next moving direction based on two-stage stochastic design for satisfying that the outage SINR of users becomes close to the desired value as possible. Through computer simulations, it has been verified that SINR degradation caused by user movement can be suppressed by the proposed method compared with the fixed location based design avoiding frequent feedback of information on location with less than 10% increase of energy consumption, except the case all users are moving in a system with small number of cells where improvement is relatively small. Some future works like reduction of computational cost are also described.