A QoS-based Power Allocation for Cellular Users with Different Modulations

TL;DR

This paper introduces a novel power allocation method for cellular networks that optimizes QoS for users with different channel qualities and modulations, improving resource distribution efficiency.

Contribution

It proposes a new optimal power allocation approach using sigmoidal utility functions, accounting for diverse user conditions and CQI zones, with an enhanced resource allocation algorithm.

Findings

Higher CQI requires lower power thresholds for QoS

The proposed algorithm better allocates resources to users not meeting QoS

Compared to previous methods, it improves user QoS achievement

Abstract

In this paper, we propose a novel optimal power allocation method that features a power limit function and is able to ensure more users reach the desired Quality-of-Service (QoS). In our model we use sigmoidal-like utility functions to represent the probability of successful reception of packets at user equipment (UE)s. Given that each UE has a different channel quality and different location from base station (BS), it has different CQI and modulation. For each CQI zone, we evaluate the power threshold which is required to achieve the minimum QoS for each UE and show that the higher CQI the lower power threshold is. We present a resource allocation algorithm that gives limited resources to UEs who have already reached their pre-specified minimum QoS, and provides more possible resources to UEs who can not reach it. We also compare this algorithm with the optimal power allocation algorithm in [1] to show the enhancement.