Power Control for Self-Organizing Network in LTE-Advanced System

Abstract

Self-organizing network is used for regional communications, which makes up for the coverage of mobile communication system. In LTE-Advanced network, such network forms by proximity communications and utilizes the limited bandwidth efficiently. However, the system frequencies shared by the terminals in self-organizing network belong to cellular terminals, the resource reusing leads to interference. Meanwhile, due to the mobility of devices and the dynamic topology of self-organizing network, the level of interference becomes more unpredictable. In this paper, we proposed to establish a probabilistic statistical model that randomizer the spectrum allocation problem for self-organizing terminals. Through the model, we simplify the power control algorithm with convex optimization method. Simulation shows that our proposed distributed admission and power control (DAPC) algorithm can improve the Signal to Interference plus Noise Ratio of users mostly 5-10dB. Even the network changes during the communication process, this algorithm also province that the interference is acceptable.

Achieving power and energy efficiency in self-organizing networks

“…They used the Lagrange multipliers and presented an iterative algorithm to reach Nash equilibriums. The study in [14] presented a power allocation algorithm for adjusting the transmit power in each sub-band. The algorithm creates an efficient and dynamic SFR pattern for enhancing the performance of OFDMA downlink.…”