HARQ performance modelling and evaluation of mobile WiMAX for network simulators

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.

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