Title: HARQ performance modelling and evaluation of mobile WiMAX for network simulators

Authors: Puttipong Mahasukhon; Hamid Sharif; Michael Hempel; Ting Zhou; Wei Wang; Tao Ma

Addresses: University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA. ' University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA. ' University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA. ' University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA. ' University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA. ' University of Nebraska - Lincoln, 6001 Dodge Street, 200 Peter Kiewit Institute Omaha, NE 68182, USA

Abstract: While the development of Mobile Worldwide Interoperability for Microware Access (WiMAX) devices is still an ongoing process, complete and accurate simulations become more important in order to study the performance of Mobile-WiMAX based broadband wireless access networks. To further improve network simulation models for Mobile WiMAX, we have theoretically modelled the hybrid automatic repeat request (HARQ) mechanism and evaluated its performance and accuracy. In this paper, we present the design and implementation methodology of the Mobile WiMAX HARQ simulation model in system-level network simulators in order to gain benefits in link quality provided by enabling HARQ. Our results show that HARQ achieves higher throughput even at low signal strength, which can be considered as a non-line-of-sight scenario.

Keywords: IEEE 802.16e-2005; mobile WiMAX; worldwide interoperability; microwave access; HARQ; hybrid automatic repeat request; performance evaluation; modelling; ns-2; network simulation; Markov chain; broadband access.

DOI: 10.1504/IJAACS.2012.049477

International Journal of Autonomous and Adaptive Communications Systems, 2012 Vol.5 No.4, pp.342 - 359

Published online: 05 Dec 2014 *

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