Low-Complexity QoS-Aware Coordinated Scheduling for Heterogenous Networks

TL;DR

This paper introduces a low-complexity, QoS-aware coordinated scheduling strategy for heterogeneous networks with femtocells, enhancing user throughput while maintaining fairness and requiring limited coordination.

Contribution

It proposes a novel QoS-aware coordinated scheduling method with limited coordination, providing exact statistical analysis of achievable rates in HetNets.

Findings

Improved femtocell user throughput

Maintains QoS for macrocell users

Ensures scheduling fairness

Abstract

In this paper, we consider a heterogenous network (HetNet), where low-power indoor femtocells are deployed in the coverage area of the existing macro base station (MBS). This paper proposes a novel coordinated random beamforming and user scheduling strategy to improve the throughput of users served by the femtocell access point (FAP) while satisfying the quality-of-service (QoS) requirements of users served by both MBS and FAP. The strategy, termed as QoS-Aware Coodinated Scheduling (QACS), requires limited coordination between the MBS and FAP, i.e., only the indexes of the qualified beams are shared. Exact statistical analysis for the ergodic achievable rate of both FAP and MBS with the proposed strategy are presented. Scheduling fairness is also addressed for the proposed QACS.