QoS-TEOS: QoS Guaranteed Throughput-Efficiency Optimal Distributed Scheduling in WiMAX Mesh Networks |
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Authors: | Da Teng Shou-Bao Yang Wei-Qing He Yun Hu |
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Affiliation: | (1) Department of Computer Science, Thomas J. Watson School of Engineering and Applied Science, State University of New York at Binghamton Binghamton, 6000, Binghamton NY, 13902-6000, USA; |
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Abstract: | WiMAX distributed scheduling can be modeled as two procedures: three-way handshaking procedure and data subframe scheduling
procedure. Due to manipulating data transmission directly, data subframe scheduling has a closer relationship with user Quality
of Service (QoS) satisfaction, and has more severe impact on network performance, compared with handshaking procedure. A QoS
guaranteed Throughput-Efficiency Optimal distributed data subframe Scheduling scheme, named as QoS-TEOS, is proposed. QoS-TEOS
achieves QoS guarantee through modeling services into different ranks and assigning them with corresponding priorities. A
service with higher priority is scheduled ahead of that with lower priority and offered with high QoS quality. Same kinds
of services that request similar QoS quality are classified into one service set. Different service sets are scheduled with
different strategies. QoS-TEOS promotes network performance through improving network throughput and efficiency. Theoretical
analysis shows that the scheduled data transmission should balance data generation rate from upper layer and transmission
rate of physical layer, to avoid network throughput and efficiency declining. Simulation results show that QoS-TEOS works
excellently to achieve throughput-efficiency optimization and guarantee a high QoS. |
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