Scheduling in multihop WiMAX networks
ACM SIGMOBILE Mobile Computing and Communications Review
An adaptive cross-layer design for multiservice scheduling in OFDMA based mobile WiMAX systems
Computer Communications
Scheduling in IEEE 802.16e Mobile WiMAX networks: key issues and a survey
IEEE Journal on Selected Areas in Communications - Special issue on broadband access networks: Architectures and protocols
An optimized scheduling scheme in OFDMA WiMax networks
International Journal of Communication Systems
Downlink resource management for QoS scheduling in IEEE 802.16 WiMAX networks
Computer Communications
Computer Networks: The International Journal of Computer and Telecommunications Networking
WiMAX/OFDMA Burst Scheduling Algorithm to Maximize Scheduled Data
IEEE Transactions on Mobile Computing
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In IEEE 802.16 WiMAX, it is a challenging task to achieve quality of service QoS by using scheduling technique as it requires understanding the traffic features and service requirements. Also most of existing works have considered only one of the service flows among rtPS, ertPS, nrtPS, UGS and BE. In addition, the existing priority estimation methods are not so accurate. To overcome these problems, in this paper, we propose a fuzzy based scheduling technique for multiple service flows in IEEE 802.16 WiMAX networks. This technique involves two entities namely evaluator and slot allocator. When the service flow enters into the network, the evaluator distinguishes the service flow as real time or non real time and estimates its priority using fuzzy logic technique. Then the evaluator arranges the real time and non real time service flows in two sub queues and then sorts them by their priority levels. The slot allocator obtains the priority information of service flows from the evaluator to allocate slots. By simulation results, we show that the proposed approach is better in terms of the measured channel utilization and received bandwidth for real-time and non real time flows.