Joint QoS-control and Handover Optimization in Backhaul aware SDN-based LTE Networks

TL;DR

This paper presents a framework for SDN-based LTE networks that jointly manages QoS and non-QoS traffic across access and backhaul, improving throughput and congestion handling in dense cellular environments.

Contribution

It introduces a novel SDN-LTE framework with mechanisms for joint QoS and traffic management, tested via simulations showing significant throughput improvements.

Findings

At least 6% increase in average QoS user throughput

Up to 40% improvement for edge users

Efficient QoS achievement without high overhead

Abstract

Future cellular networks will be dense and require key traffic management technologies for fine-grained network control. The problem gets more complicated in the presence of different network segments with bottleneck links limiting the desired quality of service (QoS) delivery to the last mile user. In this work, we first design a framework for software-defined cellular networks (SDCN) and then propose new mechanisms for management of QoS and non-QoS users traffic considering both access and backhaul networks, jointly. The overall SDN-LTE system and related approaches are developed and tested using network simulator (ns-3) in different network environments. Especially, when the users are non-uniformly distributed, the results shows that compared to other approaches, the proposed load distribution algorithm enables at least 6\% and 23\% increase in the average QoS user downlink (DL) throughput for all network users and 40\%-ile edge users, respectively. Also, the proposed system efficiently achieves desired QoS and handles the network congestion without incurring significant overhead.