Analytical Modeling of Interference Aware Power Control for the Uplink of Heterogeneous Cellular Networks

摘要

Inter-cell interference is one of the main limiting factors in currentHeterogeneous Cellular Networks (HCNs). Uplink Fractional Power Control (FPC)is a well known method that aims to cope with such limiting factor as well asto save battery live. In order to do that, the path losses associated withMobile Terminal (MT) transmissions are partially compensated so that a lowerinterference is leaked towards neighboring cells. Classical FPC techniques onlyconsider a set of parameters that depends on the own MT transmission, likedesired received power at the Base Station (BS) or the path loss between the MTand its serving BS, among others. Contrary to classical FPC, in this paper weuse stochastic geometry to analyze a power control mechanism that keeps theinterference generated by each MT under a given threshold. We also consider amaximum transmitted power and a partial compensation of the path loss.Interestingly, our analysis reveals that such Interference Aware (IA) methodcan reduce the average power consumption and increase the average spectralefficiency. Additionally, the variance of the interference is reduced, thusimproving the performance of Adaptive Modulation and Coding (AMC) since theinterference can be better estimated at the MT.