The combination of QoS,aggregation and RTS/CTS in Very High Throughput IEEE 802.11ac networks |
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Institution: | 1. Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education, Xiangtan University, Xiangtan 411105, China;2. Postdoctoral Research Station for Mechanics, Xiangtan University, Xiangtan 411105, China;3. College of Software and Communication Engineering, Xiangnan University, Chenzhou 423043, China |
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Abstract: | We consider a single WiFi cell in which multiple mobile stations transmit multiple QoS constrained Application flows to the Access Point. We investigate the efficiency of using RTS/CTS in the face of the QoS constraints, in various Access Categories that are defined in the WiFi standard, in a number of transmitting stations and in various amounts of aggregation. We show that using RTS/CTS is efficient in terms of Throughput, when there are collisions and the time to recover these collisions is within the Delay/Loss constraints of the Application flows. It turns out that RTS/CTS is most efficient in the Video and Voice Access Categories and Delay constrains in the order of several tens of milli-seconds. For smaller Delay constraints it is more efficient without RTS/CTS. Thus, we show the existence of cross-points: In Delay constraints smaller than the cross points it is more efficient without RTS/CTS and beyond the cross-points the opposite is true. |
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Keywords: | 802 11ac WiFi Aggregation QoS Application flows RTS/CTS |
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