Multi-frequency Large-Scale Channel Modeling and Green Networking Design

In this paper, we conduct the measurement campaign in the urban microcell (UMi) outdoor-to-indoor (O2I) scenario, with the object to investigate the large-scale fading at 900 MHz, 2.6 GHz, and 3.5 GHz. Specifically, the path loss model is constructed based on the experimental data and the 3GPP TR36.873 channel model standard. Furthermore, according to the channel model, we propose a triple-band frequency-switching (TB-FS) scheme, which can minimize the transmitting power of a base station. Simulation results indicate that considering the propagation characteristics, the low frequency is preferred under small rate requirement and the high frequency is preferred under the large rate requirement. Furthermore, we find that the optimal spectrum is independent from positions of the devices. These results are valuable for the design and optimization of green communications and network deployment.