Power Control Factor Selection in Uplink OFDMA Cellular Networks

TL;DR

This paper evaluates the uplink power control factor in OFDMA cellular networks to optimize transmit power, coverage, and data rate, finding that a factor near 0.5 balances these aspects effectively.

Contribution

It introduces a method to select the optimal power control factor based on key network performance parameters, providing practical guidelines for uplink power control.

Findings

Optimal power control factor is close to 0.5.

Trade-off between power, coverage, and rate is effectively managed.

Numerical results support the proposed selection criterion.

Abstract

Uplink power control plays a key role on the performance of uplink cellular network. In this work, the power control factor ($\in[0,1]$) is evaluated based on three parameters namely: average transmit power, coverage probability and average rate. In other words, we evaluate power control factor such that average transmit power should be low, coverage probability of cell-edge users should be high and also average rate over all the uplink users should be high. We show through numerical studies that the power control factor should be close to $0.5$ in order to achieve an acceptable trade-off between these three parameters.