Interference in Wireless Networks -- A Power Allocation Approach
Tzalik Maimon, Shirley Alus, Gil Kedar
TL;DR
The paper tackles Co-Channel Interference (CCI) in dense wireless networks by introducing a deterministic Power Allocation (PA) framework that uses time-slot division to minimize interference and reduce frequency usage. It models interference with a graph-coloring approach, derives per-slot transmission powers using path-loss and antenna radiation patterns, and introduces an allowed-interference interpolation to optimize a ratio $x$ governing interference. A frequency allocation planning method based on Power-Gain (PG) metrics and a greedy, deterministic algorithm achieves near-optimal balance of power and interference, with a provable runtime bound. Experimental results from Python simulations show capacity gains and lower energy waste compared to single-frequency baselines, highlighting the practical impact of time-division PA and frequency planning for next-generation networks.
Abstract
Co-Channel Interference (CCI) is a fundamental problem in wireless communication networks. It is a well-studied problem in the field. As channels use the same frequency, interference in the radio waves occurs which, in turn, reduces the capacity of the interfered channels. There is a need to use the least number of frequencies as communication networks advance to 5G. In this paper, we present a novel technique to manage interference on channels. We use time division for links of the same frequency and, as a result, we show a significant reduction in the number of frequencies used overall in the network.