Multi-user access mechanism with intra-access categories differentiation for IEEE 802.11ac wireless local area networks

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• 作者：Emna Charfi ; Lamia Chaari ; Souha Ben Hlima ; Lotfi Kammoun
• 关键词：IEEE 802.11aa ; IEEE 802.11ac ; Multicast ; Multi ; user ; TXOP sharing ; MUMAM ; Delay ; Intra ; AC differentiation
• 刊名：Telecommunication Systems
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：64
• 期：3
• 页码：479-494
• 全文大小：
• 刊物类别：Business and Economics
• 刊物主题：IT in Business; Computer Communication Networks; Artificial Intelligence (incl. Robotics); Probability Theory and Stochastic Processes;
• 出版者：Springer US
• ISSN：1572-9451
• 卷排序：64

文摘

To cope with the increasing demand of multimedia applications, new IEEE 802.11 wireless local area networks devices have been defined such as IEEE 802.11aa and IEEE 802.11ac. The former proposes new intra-access categories (AC) differentiation based on stream classification service (SCS) scheme. The latter standard allows simultaneous downlink transmissions thanks to downlink multi-user MIMO technology and sharing transmission opportunity (TXOP) period scheme. In this paper, we focus on the basis of this technique and the behavior of the access point (AP) to manage the multi-user access. Then, we propose a hybrid access mechanism entitled multi-user multi-cast access mechanism (MUMAM) that supports downlink multi-user transmissions while considering intra-AC differentiation. MUMAN considers SCS scheme to prioritize between multicast and unicast flows of an AC and follows transmissions based on IEEE 802.11ac TXOP sharing technique. Extensive simulation and analysis show that MUMAM has a significant positive impact on delay and throughput performance of different AC(s).