Cost factor analysis of QoS in LTE/EPC mobile networks

Abstract

Apart from its tremendous enhanced transfer performances, the LTE/EPC mobile network is intended to distinguish itself from previous mobile technologies as an all-IP system. Nevertheless, far from usual IP QoS management policies, its QoS model inherits many characteristics of circuit oriented model of legacy standards. Additional signalling procedures are required in order to establish an end-to-end dedicated bearer for each desired QoS level. A major issue of this QoS model is the management load related to contexts and bearers established by each user equipment. This paper proposes an analytical model to evaluate the impact of this standard QoS model in terms of Context Load, Processing Load and Memory Access Rate in various LTE/EPC network elements. Simulation results are then presented to evaluate the impact of different realistic scenarios of QoS deployment.

Performance Comparison of QoS Deployment Strategies for Cellular Network Services

“…QoS Support: There are various works that investigate QoS support for different mobile network deployment scenarios. For QoS Long Term Evolution (LTE) networks, the article in [4] proposes an analytical QoS model in terms of context load, processing load and memory access rate in various elements. QoS provisioning solutions are presented in [8], [9] and the QoS needs of critical communications are detailed in [10] for 5G networks.…”

“…In a mMTC scenario, massive number of UEs with NB-IoT capabilities accessing cellular network are simulated together using a QoS-aware priority-based scheduling strategy in [18]. Based on 3GPP QoS rule, an algorithm design that prioritizes GBR and non-GBR bearers of difference QCIs is designed [4], [5], [6], [7].…”

“…Therefore, in the following section, we will discuss a heuristic approach to the optimization problem given in (4). In our scheduling design methodology, UEs-RBs assignments are done while providing the necessary QoS guarantees for different UE types.…”