文章基本信息

标题：An Adaptive MAC Scheduling Algorithm for Guaranteed QoS in IEEE 802.11e HCCA
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作者：Sung-Ryun Kim ; Dong-Yul Lee ; Chae-Woo Lee 等
期刊名称：International Journal of Future Generation Communication and Networking
印刷版ISSN：2233-7857
出版年度：2008
卷号：1
期号：1
出版社：SERSC
摘要：The IEEE 802.11e standard guarantees QoS in the MAC layer by using new HCF (Hybrid Coordination Function) protocol. The HCF is composed of two access functions: A distributed contention-based channel access function (EDCA) providing prioritized QoS and a cen- tralized polling-based channel access function (HCCA) providing para- meterized QoS. In this paper, we propose a new scheduling algorithm for HCCA to support QoS. The proposed scheduler guarantees QoS by using adaptive service intervals, transmission opportunities, and polling order. The service schedule is based not only on the tra±c's TSPEC parameters but also on the instance bu®ered tra±c conditions and transmission de- lay of other tra±c. Simulation results show that the proposed scheduling algorithm is superior to the existing TGe Reference scheduler, SETT- EDD, and ARROW algorithms in terms of throughput, transmission delay and jitter