Interference Performance Analysis of Frequency Reuse Techniques for LTE-R Systems

摘要

Due to the technical advantages and performance enhancement of Long Term Evolution (LTE), LTE for railway system is a promising evolutional train to ground communication system instead of the Global System for Mobile Communications-Railway (GSM-R) in High-Speed Railway (HSR). To mitigate the effects of inter-cell interference of LTE-R on the QoS of HSR communication applications, the fractional frequency reuse (FFR) and soft frequency reuse (SFR) schemes are designed in the linear radio coverage scenario. Based on the moment generating function (MGF) approach, a novel theoretical analysis method of area spectral efficiency (ASE) in uplink and downlink for both FFR and SFR schemes is presented. We also investigate the impacts of overlapping depth between the adjacent cells on the system performance of LTE-R. The simulation results show that the reasonable frequency reuse techniques can be selected in accordance with different overlapping depths to improve the performance of LTE-R.