Jeng Farn LeeMeng Chang ChenWANJIUN LIAO2018-09-102018-09-102007-121383469Xhttp://scholars.lib.ntu.edu.tw/handle/123456789/333770https://www.scopus.com/inward/record.uri?eid=2-s2.0-33846288321&doi=10.1007%2fs11036-006-0007-8&partnerID=40&md5=d5189d141f5af7ff7b5e009ad72a49aaIn this paper, we propose a new differentiated service model, referred to as Differentiated Service-EDCA (DS-EDCA), for the Enhanced Distributed Channel Access (EDCA) of IEEE 802.11e wireless local area networks (WLANs). With DS-EDCA, both strict priority and weighted fair service can be provided. The strict priority service is provided for high priority traffic through carefully setting the EDCA parameter sets of lower priority traffic; the proportional fairness service is enabled by determining the backoff intervals according to the distributed scheduling discipline (DFS). We also propose a hierarchical link sharing model for IEEE 802.11e WLANs, in which AP and mobile stations are allocated different amounts of link resource. The performance of DS-EDCA and EDCA is compared via ns-2 simulations. The results show that DS-EDCA outperforms the original EDCA in terms of its support for both strict priority and weighted fair service. More importantly, DS-EDCA can be easily implemented, and is compatible to the IEEE 802.11 Standard. © Springer Science+Business Media, LLC 2007.application/pdfapplication/pdf802.11e; EDCA; Hierarchical link sharing; Strict priority; Weighted fair serviceChannel capacity; Local area networks; Parameter estimation; Telecommunication links; Telecommunication services; Telecommunication traffic; 802.11e; EDCA; Hierarchical link sharing; Strict priority; Weighted fair service; Wireless telecommunication systemsconference paper10.1007/s11036-006-0007-82-s2.0-33846288321WOS:000243466300007