Title: Quality of service class mapping and scheduling scheme for converged LTE-WiFi in the next generation networks

Authors: Amer T. Saeed; Amir Esmailpour

Addresses: Department of Electrical and Computer Engineering, University of New Haven, West Haven, CT, USA ' Department of Electrical and Computer Engineering, University of New Haven, West Haven, CT, USA

Abstract: In this paper, a novel quality of service (QoS) class mapping and scheduling scheme for the LTE-WiFi converged network is proposed to ensure that end-to-end QoS support is provisioned seamlessly. A mapping among QoS classes of LTE and WiFi is performed first, then scheduling scheme is outlined. For scheduling scheme, traffic is separated into real-time (RT) and non-real-time (NRT) components, then a two-stage complex queuing strategy is performed. In the first stage, deficit weighted round robin queuing (DWRRQ) and class-based weighted fair queuing (CBWFQ) are used for RT and NRT applications respectively to segregate and forward traffic according to resource requirements. Whereas in the second stage, rate-control priority queuing (RCPQ) is used for all types of traffic to give each class appropriate priority level. Performance evaluation of the converged network was done based on different metrics such as jitter, end-to-end delay, throughput, and packet loss ratio. Simulation results show significant improvements for RT with slight degradation on NRT applications after using the new scheduling scheme.

Keywords: quality of service; QoS; long-term evolution; LTE; wireless fidelity; WiFi; converged; next generation networks; NGNs; scheduling scheme.

DOI: 10.1504/IJCNDS.2019.101917

International Journal of Communication Networks and Distributed Systems, 2019 Vol.23 No.3, pp.352 - 379

Received: 27 Jun 2017
Accepted: 23 Mar 2018
Published online: 30 Aug 2019 *

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