Modeling and Analysis of TXOP Differentiation in Infrastructure-Based WLANs
The Access Point (AP) is the bottleneck of infrastructure-based Wireless Local Area Networks (WLANs) due to its responsibility for forwarding all the incoming and outgoing frames. As a result, the network performance is significantly deteriorated by the unbalanced traffic loads at AP and other mobile stations. A potential solution to the bottleneck problem is to assign different Transmission OPportunity (TXOP) limits to the AP and mobile stations, respectively. This paper develops a new analytical model to investigate the Quality-of-Service (QoS) performance metrics including throughput, total frame delay, and frame loss probability in infrastructure-based WLANs with TXOP differentiation under the unbalanced traffic loads.