Fairness and QoS guarantees of WiMAX OFDMA scheduling with fuzzy controls

Authors:
Chao-Lieh Chen;Jeng-Wei Lee;Chi-Yuan Wu;Yau-Hwang Kuo
Affiliations:
Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung, Taiwan;Department of Computer Science & Information Engineering, National Cheng Kung University, Tainan, Taiwan;Department of Computer Science & Information Engineering, National Cheng Kung University, Tainan, Taiwan;Department of Computer Science & Information Engineering, National Cheng Kung University, Tainan, Taiwan
Venue:
EURASIP Journal on Wireless Communications and Networking - Special issue on fairness in radio resource management for wireless networks
Year:
2009

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Abstract

A fairness and QoS guaranteed scheduling approach with fuzzy controls (FQFCs) is proposed for WiMAX OFDMA systems. The controllers, respectively, adjust priority and transmission opportunity (TXOP) for each WiMAX connection according to QoS requirements and service classes. The FQFC provides intra- and interclass fairness guarantees by making connections within the same class achieve equal degree of QoS while at the same time making those without QoS requirements equally share the remaining resources. Even in dynamic environments such as mobile WiMAX networks with time-variant traffic specifications, the FQFC fairly guarantees delay, throughput, and jitter, which are seldom achieved at the same time by state-of-the-art solutions.