Analytical Modeling of TCP Dynamics in Infrastructure-Based IEEE 802.11 WLANs

Date Added: Jul 2009
Format: PDF

IEEE 802.11Wireless LAN (WLAN) has become the prevailing solution for wireless Internet access while Transport Control Protocol (TCP) is the dominant transport-layer protocol in the Internet. It is known that, in an infrastructure-based WLAN with multiple stations carrying long-lived TCP flows, the number of TCP stations that are actively contending to access the wireless channel remains very small. Hence, the aggregate TCP throughput is basically independent of the total number of TCP stations. This phenomenon is due to the closed-loop nature of TCP flow control and the bottleneck downlink (i.e., AP-to-station) transmissions in infrastructure-based WLANs. In this paper, the authors develop a comprehensive analytical model to study TCP dynamics in infrastructure-based 802.11 WLANs.